[net-next,1/3] Add LAN743X driver

diff --git a/drivers/net/ethernet/microchip/lan743x.c b/drivers/net/ethernet/microchip/lan743x.c
new file mode 100644
index 0000000..44d04ac
--- /dev/null
+++ b/drivers/net/ethernet/microchip/lan743x.c
@@ -0,0 +1,6842 @@ 
+/*
+ * Copyright (C) 2017 Microchip Technology
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * 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.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, see <http://www.gnu.org/licenses/>.
+ */
+
+#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/phy.h>
+#include "lan743x.h"
+
+#define DRIVER_AUTHOR   "Bryan Whitehead <Bryan.Whitehead@microchip.com>"
+#define DRIVER_DESC "LAN743x PCIe Gigabit Ethernet Driver"
+#define DRIVER_NAME "lan743x"
+#define DRIVER_VERSION  "0.2.0.0"
+
+/* use ethtool to change the message enable for any given adapter */
+static int msg_enable =	NETIF_MSG_DRV | NETIF_MSG_PROBE | NETIF_MSG_LINK |
+			NETIF_MSG_IFUP | NETIF_MSG_IFDOWN | NETIF_MSG_TX_QUEUED;
+module_param(msg_enable, int, 0000);
+MODULE_PARM_DESC(msg_enable, "Override default message enable");
+
+#define LAN743X_COMPONENT_FLAG_PCI          BIT(0)
+#define LAN743X_COMPONENT_FLAG_CSR          BIT(1)
+#define LAN743X_COMPONENT_FLAG_INTR         BIT(2)
+#define LAN743X_COMPONENT_FLAG_DP           BIT(3)
+#define LAN743X_COMPONENT_FLAG_GPIO         BIT(4)
+#define LAN743X_COMPONENT_FLAG_MAC          BIT(5)
+#define LAN743X_COMPONENT_FLAG_PHY          BIT(6)
+#define LAN743X_COMPONENT_FLAG_PTP          BIT(7)
+#define LAN743X_COMPONENT_FLAG_RFE          BIT(8)
+#define LAN743X_COMPONENT_FLAG_FCT          BIT(9)
+#define LAN743X_COMPONENT_FLAG_DMAC         BIT(10)
+#define LAN743X_COMPONENT_FLAG_TX(channel)  BIT(16 + (channel))
+#define LAN743X_COMPONENT_FLAG_RX(channel)  BIT(20 + (channel))
+
+#define LAN743X_INIT_FLAG_NETDEV_REGISTERED BIT(24)
+
+/* PCI */
+#define INIT_FLAG_PCI_DEVICE_ENABLED        BIT(0)
+#define INIT_FLAG_PCI_REGIONS_REQUESTED     BIT(1)
+#define INIT_FLAG_CSR_MAPPED                BIT(2)
+
+static int lan743x_pci_init(struct lan743x_adapter *adapter,
+			    struct pci_dev *pdev)
+{
+	int ret = -ENODEV;
+	int bars = 0;
+	struct lan743x_pci *pci = &adapter->pci;
+
+	NETIF_ASSERT(adapter, probe, adapter->netdev, pdev);
+	memset(pci, 0, sizeof(struct lan743x_pci));
+	pci->pdev = pdev;
+
+	ret = pci_enable_device_mem(pdev);
+	if (ret) {
+		NETIF_WARNING(adapter, probe, adapter->netdev,
+			      "failed pci_enable_device_mem, ret = %d", ret);
+		goto clean_up;
+	}
+	pci->init_flags |= INIT_FLAG_PCI_DEVICE_ENABLED;
+
+	if (pdev->vendor != PCI_VENDOR_ID_SMSC) {
+		NETIF_ERROR(adapter, probe, adapter->netdev,
+			    "Unsupported Vendor ID, 0x%04X,", pdev->vendor);
+		ret = -ENODEV;
+		goto clean_up;
+	}
+
+	if (pdev->device != PCI_DEVICE_ID_SMSC_LAN7430) {
+		NETIF_ERROR(adapter, probe, adapter->netdev,
+			    "Unsupported Device ID, 0x%04X", pdev->device);
+		ret = -ENODEV;
+		goto clean_up;
+	}
+
+	NETIF_INFO(adapter, probe, adapter->netdev,
+		   "PCI: Vendor ID = 0x%04X, Device ID = 0x%04X",
+		   pdev->vendor, pdev->device);
+
+	bars = pci_select_bars(pdev, IORESOURCE_MEM);
+	ret = pci_request_selected_regions(pdev, bars, DRIVER_NAME);
+	if (ret) {
+		NETIF_WARNING(adapter, probe, adapter->netdev,
+			      "failed pci_request_selected_Regions, ret = %d",
+			      ret);
+		goto clean_up;
+	}
+	pci->init_flags |= INIT_FLAG_PCI_REGIONS_REQUESTED;
+	pci->bar_flags = bars;
+
+	pci_set_master(pdev);
+
+clean_up:
+	if (ret) {
+		NETIF_WARNING(adapter, probe, adapter->netdev,
+			      "pci init failed, performing cleanup");
+		lan743x_pci_cleanup(adapter);
+	}
+	return ret;
+}
+
+static void lan743x_pci_cleanup(struct lan743x_adapter *adapter)
+{
+	struct lan743x_pci *pci = &adapter->pci;
+
+	if (pci->init_flags & INIT_FLAG_PCI_REGIONS_REQUESTED) {
+		pci_release_selected_regions(pci->pdev,
+					     pci_select_bars(
+					     pci->pdev, IORESOURCE_MEM));
+		pci->init_flags &= ~INIT_FLAG_PCI_REGIONS_REQUESTED;
+	}
+
+	if (pci->init_flags & INIT_FLAG_PCI_DEVICE_ENABLED) {
+		pci_disable_device(pci->pdev);
+		pci->init_flags &= ~INIT_FLAG_PCI_DEVICE_ENABLED;
+	}
+
+	memset(pci, 0, sizeof(struct lan743x_pci));
+}
+
+static u8 __iomem *lan743x_pci_get_bar_address(struct lan743x_adapter *adapter,
+					       int bar_index)
+{
+	u8 __iomem *result = NULL;
+	struct lan743x_pci *pci = &adapter->pci;
+
+	NETIF_ASSERT(adapter, drv, adapter->netdev,
+		     (bar_index >= 0) && (bar_index < 6));
+
+	if (test_bit(bar_index, &pci->bar_flags)) {
+		resource_size_t bar_start, bar_length;
+
+		bar_start = pci_resource_start(pci->pdev, bar_index);
+		bar_length = pci_resource_len(pci->pdev, bar_index);
+		result = ioremap(bar_start, bar_length);
+	}
+
+	return result;
+}
+
+static void lan743x_pci_release_bar_address(struct lan743x_adapter *adapter,
+					    int bar_index,
+					    u8 __iomem *bar_address)
+{
+	NETIF_ASSERT(adapter, drv, adapter->netdev,
+		     (bar_index >= 0) && (bar_index < 6));
+	NETIF_ASSERT(adapter, drv, adapter->netdev, bar_address);
+
+	iounmap(bar_address);
+}
+
+static unsigned int lan743x_pci_get_irq(struct lan743x_adapter *adapter)
+{
+	struct lan743x_pci *pci = &adapter->pci;
+
+	return pci->pdev->irq;
+}
+
+/* CSR */
+static int lan743x_csr_init(struct lan743x_adapter *adapter)
+{
+	struct lan743x_csr *csr = &adapter->csr;
+	int result = -ENOMEM;
+	int supported = 0;
+
+	NETIF_ASSERT(adapter, probe, adapter->netdev, csr);
+	memset(csr, 0, sizeof(struct lan743x_csr));
+
+	csr->csr_address = lan743x_pci_get_bar_address(adapter, 0);
+	if (!csr->csr_address) {
+		NETIF_ERROR(adapter, probe, adapter->netdev,
+			    "failed to get 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",
+		   csr->id_rev,	(csr->fpga_rev) & 0x000000FF,
+		   ((csr->fpga_rev) >> 8) & 0x000000FF);
+
+	if ((csr->id_rev & 0xFFFF0000) == 0x74300000)
+		supported = 1;
+
+	if (!supported) {
+		NETIF_ERROR(adapter, probe, adapter->netdev,
+			    "unsupported adapter, ID_REV = 0x%08X",
+			    csr->id_rev);
+		result = -ENODEV;
+		goto clean_up;
+	}
+
+	result = lan743x_csr_light_reset(adapter);
+	if (result) {
+		NETIF_ERROR(adapter, probe, adapter->netdev,
+			    "light reset failed");
+		goto clean_up;
+	}
+
+	result = 0;
+
+clean_up:
+	if (result)
+		lan743x_csr_cleanup(adapter);
+	return result;
+}
+
+static void lan743x_csr_cleanup(struct lan743x_adapter *adapter)
+{
+	struct lan743x_csr *csr = &adapter->csr;
+
+	if (csr->csr_address)
+		lan743x_pci_release_bar_address(adapter, 0, csr->csr_address);
+
+	memset(csr, 0, sizeof(struct lan743x_csr));
+}
+
+static int lan743x_csr_light_reset(struct lan743x_adapter *adapter)
+{
+	int result = -EIO;
+	u32 data;
+	unsigned long timeout;
+
+	data = lan743x_csr_read(adapter, HW_CFG);
+	data |= HW_CFG_LRST_;
+	lan743x_csr_write(adapter, HW_CFG, data);
+
+	timeout = jiffies + (10 * HZ);
+	do {
+		if (time_after(jiffies, timeout)) {
+			NETIF_ERROR(adapter, drv, adapter->netdev,
+				    "timeout, incomplete soft reset");
+			result = -EIO;
+			goto done;
+		}
+		msleep(100);
+		data = lan743x_csr_read(adapter, HW_CFG);
+	} while (data & HW_CFG_LRST_);
+	result = 0;
+done:
+	return result;
+}
+
+static inline u32 lan743x_csr_read(struct lan743x_adapter *adapter, int offset)
+{
+	return ioread32(&adapter->csr.csr_address[offset]);
+}
+
+static inline void lan743x_csr_write(
+	struct lan743x_adapter *adapter, int offset, u32 data)
+{
+	iowrite32(data, &adapter->csr.csr_address[offset]);
+}
+
+/* INTERRUPTS */
+#define INTR_FLAG_IRQ_REQUESTED(vector_index)	BIT(0 + vector_index)
+#define INTR_FLAG_MSI_ENABLED			BIT(8)
+#define INTR_FLAG_MSIX_ENABLED			BIT(9)
+#define INTR_FLAG_OPENED			BIT(10)
+
+static void lan743x_vector_init(struct lan743x_vector *vector,
+				struct lan743x_adapter *adapter,
+				int vector_index, int irq, u32 int_mask,
+				lan743x_vector_handler handler, void *context)
+{
+	NETIF_ASSERT(adapter, probe, adapter->netdev, vector);
+	NETIF_ASSERT(adapter, probe, adapter->netdev, adapter);
+	NETIF_ASSERT(adapter, probe, adapter->netdev, int_mask);
+	NETIF_ASSERT(adapter, probe, adapter->netdev, handler);
+
+	memset(vector, 0, sizeof(struct lan743x_vector));
+
+	vector->adapter = adapter;
+	vector->vector_index = vector_index;
+	vector->irq = irq;
+	vector->int_mask = int_mask;
+	vector->handler = handler;
+	vector->context = context;
+}
+
+static void lan743x_intr_software_isr(void *context)
+{
+	struct lan743x_adapter *adapter = (struct lan743x_adapter *)context;
+	struct lan743x_intr *intr = &adapter->intr;
+	u32 int_sts;
+
+	NETIF_ASSERT(adapter, drv, adapter->netdev, adapter);
+
+	int_sts = lan743x_csr_read(adapter, INT_STS);
+	if (int_sts & INT_BIT_SW_GP_) {
+		lan743x_csr_write(adapter, INT_STS, INT_BIT_SW_GP_);
+
+		intr->software_isr_flag = 1;
+	}
+}
+
+static void lan743x_intr_other_isr(void *context, u32 int_sts)
+{
+	struct lan743x_adapter *adapter = (struct lan743x_adapter *)context;
+
+	NETIF_ASSERT(adapter, drv, adapter->netdev, adapter);
+
+	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 & INT_BIT_MAC_) {
+			lan743x_mac_isr(adapter);
+			int_sts &= ~INT_BIT_MAC_;
+		}
+		if (int_sts & INT_BIT_FCT_) {
+			lan743x_fct_isr(adapter);
+			int_sts &= ~INT_BIT_FCT_;
+		}
+		if (int_sts & INT_BIT_DMA_GEN_) {
+			lan743x_dmac_isr(adapter);
+			int_sts &= ~INT_BIT_DMA_GEN_;
+		}
+	}
+	if (int_sts) {
+		NETIF_WARNING(adapter, drv, adapter->netdev,
+			      "unhandled interrupt, int_sts = 0x%08X", int_sts);
+		lan743x_csr_write(adapter, INT_EN_CLR, int_sts);
+	}
+}
+
+static void lan743x_intr_union_isr(void *context, u32 int_sts)
+{
+	struct lan743x_adapter *adapter = (struct lan743x_adapter *)context;
+	int channel;
+
+	NETIF_ASSERT(adapter, drv, adapter->netdev, adapter);
+
+	if (int_sts & INT_BIT_ALL_RX_) {
+		for (channel = 0; channel < LAN743X_NUMBER_OF_RX_CHANNELS;
+		     channel++) {
+			u32 int_bit = INT_BIT_DMA_RX_(channel);
+
+			if (int_sts & int_bit) {
+				lan743x_rx_isr(&adapter->rx[channel],
+					       int_bit);
+				int_sts &= ~int_bit;
+			}
+		}
+	}
+	if (int_sts & INT_BIT_ALL_TX_) {
+		for (channel = 0; channel < LAN743X_NUMBER_OF_TX_CHANNELS;
+		     channel++) {
+			u32 int_bit = INT_BIT_DMA_TX_(channel);
+
+			if (int_sts & int_bit) {
+				lan743x_tx_isr(&adapter->tx[channel],
+					       int_bit);
+				int_sts &= ~int_bit;
+			}
+		}
+	}
+	if (int_sts & INT_BIT_ALL_OTHER_) {
+		lan743x_intr_other_isr(adapter, int_sts & INT_BIT_ALL_OTHER_);
+		int_sts &= ~INT_BIT_ALL_OTHER_;
+	}
+	if (int_sts) {
+		NETIF_ERROR(adapter, drv, adapter->netdev,
+			    "unhandled interrupt, int_sts = 0x%08X", int_sts);
+		lan743x_csr_write(adapter, INT_EN_CLR, int_sts);
+	}
+}
+
+static irqreturn_t lan743x_vector_isr(int irq, void *ptr)
+{
+	irqreturn_t result = IRQ_NONE;
+	struct lan743x_vector *vector = (struct lan743x_vector *)ptr;
+	struct lan743x_adapter *adapter = NULL;
+	u32 int_sts;
+	u32 mask;
+
+	NETIF_ASSERT(adapter, drv, adapter->netdev, vector);
+	adapter = vector->adapter;
+	NETIF_ASSERT(adapter, drv, adapter->netdev, adapter);
+
+	int_sts = lan743x_csr_read(adapter, INT_STS);
+	if (!(int_sts & INT_BIT_MAS_))
+		goto irq_done;
+
+	if (adapter->intr.number_of_vectors > 1) {
+		NETIF_ASSERT(adapter, drv, adapter->netdev,
+			     vector->vector_index >= 0);
+		/* disable vector interrupt */
+		lan743x_csr_write(adapter,
+				  INT_VEC_EN_CLR,
+				  INT_VEC_EN_(vector->vector_index));
+	} else {
+		/* disable master interrupt */
+		lan743x_csr_write(adapter, INT_EN_CLR, INT_BIT_MAS_);
+	}
+
+	mask = lan743x_csr_read(adapter, INT_EN_SET);
+	int_sts &= mask;
+
+	int_sts &= (vector->int_mask);
+
+	if (int_sts) {
+		if (vector->handler) {
+			vector->handler(vector->context, int_sts);
+		} else {
+			NETIF_ERROR(adapter, drv, adapter->netdev,
+				    "vector->handler == NULL");
+			/* disable interrupts on this vector */
+			lan743x_csr_write(adapter, INT_EN_CLR,
+					  vector->int_mask);
+		}
+		result = IRQ_HANDLED;
+	}
+
+	if (adapter->intr.number_of_vectors > 1) {
+		NETIF_ASSERT(adapter, drv, adapter->netdev,
+			     vector->vector_index >= 0);
+		/* enable vector interrupt */
+		lan743x_csr_write(adapter,
+				  INT_VEC_EN_SET,
+				  INT_VEC_EN_(vector->vector_index));
+	} else {
+		/* enable master interrupt */
+		lan743x_csr_write(adapter, INT_EN_SET, INT_BIT_MAS_);
+	}
+
+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;
+	} else {
+		NETIF_ERROR(adapter, drv, adapter->netdev,
+			    "timed out while waiting for test interrupt");
+	}
+
+	/* disable interrupts */
+	lan743x_csr_write(adapter, INT_EN_CLR, INT_BIT_SW_GP_);
+
+	return result;
+}
+
+static int lan743x_intr_init(struct lan743x_adapter *adapter)
+{
+	struct lan743x_intr *intr = &adapter->intr;
+
+	memset(intr, 0, sizeof(struct lan743x_intr));
+
+	intr->irq = lan743x_pci_get_irq(adapter);
+
+	lan743x_csr_write(adapter, INT_EN_CLR, 0xFFFFFFFF);
+
+	return 0;
+}
+
+static void lan743x_intr_cleanup(struct lan743x_adapter *adapter)
+{
+	struct lan743x_intr *intr = &adapter->intr;
+
+	lan743x_csr_write(adapter, INT_EN_CLR, 0xFFFFFFFF);
+
+	memset(intr, 0, sizeof(struct lan743x_intr));
+}
+
+static int lan743x_intr_open(struct lan743x_adapter *adapter)
+{
+	int ret = -ENODEV;
+	struct lan743x_intr *intr = &adapter->intr;
+	int index = 0;
+
+	NETIF_ASSERT(adapter, ifup, adapter->netdev,
+		     !(intr->flags & INTR_FLAG_OPENED));
+
+	intr->number_of_vectors = 0;
+
+	memset(&intr->msix_entries[0], 0,
+	       sizeof(struct msix_entry) * LAN743X_MAX_VECTOR_COUNT);
+	for (index = 0; index < LAN743X_MAX_VECTOR_COUNT; index++)
+		intr->msix_entries[index].entry = index;
+
+	ret = pci_enable_msix_range(adapter->pci.pdev,
+				    intr->msix_entries,
+				    LAN743X_MAX_VECTOR_COUNT,
+				    LAN743X_MAX_VECTOR_COUNT);
+	if (ret > 0) {
+		intr->flags |= INTR_FLAG_MSIX_ENABLED;
+		NETIF_INFO(adapter, ifup, adapter->netdev,
+			   "Using MSIX interrupt mode");
+		if (ret == LAN743X_MAX_VECTOR_COUNT) {
+			lan743x_vector_init(&intr->vector_list[0], adapter,
+					    0, intr->msix_entries[0].vector,
+					    INT_BIT_DMA_RX_(0),
+					    lan743x_rx_isr, &adapter->rx[0]);
+
+			ret = request_irq(intr->vector_list[0].irq,
+					  lan743x_vector_isr, 0,
+					  DRIVER_NAME,
+					  &intr->vector_list[0]);
+			if (ret) {
+				NETIF_ERROR(adapter, ifup, adapter->netdev,
+					    "request_irq failed, ret = %d",
+					    ret);
+				goto clean_up;
+			}
+			intr->flags |= INTR_FLAG_IRQ_REQUESTED(0);
+
+			lan743x_vector_init(&intr->vector_list[4], adapter,
+					    4, intr->msix_entries[4].vector,
+					    INT_BIT_DMA_TX_(0),
+					    lan743x_tx_isr, &adapter->tx[0]);
+
+			ret = request_irq(intr->vector_list[4].irq,
+					  lan743x_vector_isr, 0,
+					  DRIVER_NAME,
+					  &intr->vector_list[4]);
+			if (ret) {
+				NETIF_ERROR(adapter, ifup, adapter->netdev,
+					    "request_irq failed, ret = %d",
+					    ret);
+				goto clean_up;
+			}
+			intr->flags |= INTR_FLAG_IRQ_REQUESTED(4);
+
+			lan743x_vector_init(&intr->vector_list[5], adapter,
+					    5, intr->msix_entries[5].vector,
+					    INT_BIT_ALL_OTHER_,
+					    lan743x_intr_other_isr, adapter);
+
+			ret = request_irq(intr->vector_list[5].irq,
+					  lan743x_vector_isr, 0,
+					  DRIVER_NAME,
+					  &intr->vector_list[5]);
+			if (ret) {
+				NETIF_ERROR(adapter, ifup, adapter->netdev,
+					    "request_irq failed, ret = %d",
+					    ret);
+				goto clean_up;
+			}
+			intr->flags |= INTR_FLAG_IRQ_REQUESTED(5);
+			intr->number_of_vectors = 3;
+
+			/* map all interrupts */
+			lan743x_csr_write(adapter, INT_VEC_MAP0, 0);
+			lan743x_csr_write(adapter, INT_VEC_MAP1, 4);
+			lan743x_csr_write(adapter, INT_VEC_MAP2, 0x00555555);
+
+			/* enable vector 0, 4, 5 */
+			lan743x_csr_write(adapter, INT_VEC_EN_SET,
+					  INT_VEC_EN_(0));
+			lan743x_csr_write(adapter, INT_VEC_EN_SET,
+					  INT_VEC_EN_(4));
+			lan743x_csr_write(adapter, INT_VEC_EN_SET,
+					  INT_VEC_EN_(5));
+
+			/* enable interrupts */
+			lan743x_csr_write(adapter, INT_EN_SET, INT_BIT_MAS_);
+
+			ret = lan743x_intr_test_isr(adapter);
+			if (ret) {
+				NETIF_ERROR(adapter, ifup, adapter->netdev,
+					    "ISR test failed, irq = %d",
+					    intr->vector_list[5].irq);
+				goto clean_up;
+			} else {
+				NETIF_INFO(adapter, ifup, adapter->netdev,
+					   "irq = %d, passed ISR Test",
+					   intr->vector_list[5].irq);
+			}
+		} else {
+			if (ret != LAN743X_MAX_VECTOR_COUNT) {
+				NETIF_WARNING(adapter, ifup, adapter->netdev,
+					      "pci_enable_msix_range returned %d, but requested %d MSIX vectors",
+					      ret, LAN743X_MAX_VECTOR_COUNT);
+				NETIF_WARNING(adapter, ifup, adapter->netdev,
+					      "Will use only 1 MSIX vector instead");
+			}
+
+			lan743x_vector_init(&intr->vector_list[0], adapter,
+					    0, intr->msix_entries[0].vector,
+					    INT_BIT_ALL_RX_ | INT_BIT_ALL_TX_ |
+					    INT_BIT_ALL_OTHER_,
+					    lan743x_intr_union_isr, adapter);
+
+			ret = request_irq(intr->vector_list[0].irq,
+					  lan743x_vector_isr, 0,
+					  DRIVER_NAME,
+					  &intr->vector_list[0]);
+			if (ret) {
+				NETIF_ERROR(adapter, ifup, adapter->netdev,
+					    "request_irq failed, ret = %d",
+					    ret);
+				goto clean_up;
+			}
+			intr->flags |= INTR_FLAG_IRQ_REQUESTED(0);
+			intr->number_of_vectors = 1;
+
+			/* map all interrupts to vector 0 */
+			lan743x_csr_write(adapter, INT_VEC_MAP0, 0);
+			lan743x_csr_write(adapter, INT_VEC_MAP1, 0);
+			lan743x_csr_write(adapter, INT_VEC_MAP2, 0);
+
+			/* enable vector 0 */
+			lan743x_csr_write(adapter, INT_VEC_EN_SET,
+					  INT_VEC_EN_(0));
+
+			/* enable interrupts */
+			lan743x_csr_write(adapter, INT_EN_SET, INT_BIT_MAS_);
+
+			ret = lan743x_intr_test_isr(adapter);
+			if (ret) {
+				NETIF_ERROR(adapter, ifup, adapter->netdev,
+					    "ISR test failed, irq = %d",
+					    intr->vector_list[0].irq);
+				goto clean_up;
+			} else {
+				NETIF_INFO(adapter, ifup, adapter->netdev,
+					   "irq = %d, passed ISR Test",
+					   intr->vector_list[0].irq);
+			}
+		}
+	} else if (!pci_enable_msi(adapter->pci.pdev)) {
+		intr->flags |= INTR_FLAG_MSI_ENABLED;
+		NETIF_INFO(adapter, ifup, adapter->netdev,
+			   "Using MSI interrupt mode");
+
+		lan743x_vector_init(&intr->vector_list[0], adapter,
+				    0, adapter->pci.pdev->irq,
+				    INT_BIT_ALL_RX_ | INT_BIT_ALL_TX_ |
+				    INT_BIT_ALL_OTHER_,
+				    lan743x_intr_union_isr, adapter);
+
+		ret = request_irq(intr->vector_list[0].irq, lan743x_vector_isr,
+				  0, DRIVER_NAME, &intr->vector_list[0]);
+		if (ret) {
+			NETIF_ERROR(adapter, ifup, adapter->netdev,
+				    "request_irq failed, ret = %d", ret);
+			goto clean_up;
+		}
+		intr->flags |= INTR_FLAG_IRQ_REQUESTED(0);
+		intr->number_of_vectors = 1;
+
+		/* map all interrupts to vector 0 */
+		lan743x_csr_write(adapter, INT_VEC_MAP0, 0);
+		lan743x_csr_write(adapter, INT_VEC_MAP1, 0);
+		lan743x_csr_write(adapter, INT_VEC_MAP2, 0);
+
+		/* enable vector 0 */
+		lan743x_csr_write(adapter, INT_VEC_EN_SET, INT_VEC_EN_(0));
+
+		/* enable interrupts */
+		lan743x_csr_write(adapter, INT_EN_SET, INT_BIT_MAS_);
+
+		ret = lan743x_intr_test_isr(adapter);
+		if (ret) {
+			NETIF_ERROR(adapter, ifup, adapter->netdev,
+				    "ISR test failed, irq = %d",
+				    intr->vector_list[0].irq);
+			goto clean_up;
+		} else {
+			NETIF_INFO(adapter, ifup, adapter->netdev,
+				   "irq = %d, passed ISR Test",
+				   intr->vector_list[0].irq);
+		}
+	} else {
+		NETIF_INFO(adapter, ifup, adapter->netdev,
+			   "Using legacy interrupt mode");
+
+		lan743x_vector_init(&intr->vector_list[0], adapter,
+				    -1, intr->irq,
+				    INT_BIT_ALL_RX_ | INT_BIT_ALL_TX_ |
+				    INT_BIT_ALL_OTHER_,
+				    lan743x_intr_union_isr, adapter);
+
+		ret = request_irq(intr->vector_list[0].irq, lan743x_vector_isr,
+				  IRQF_SHARED, DRIVER_NAME,
+				  &intr->vector_list[0]);
+		if (ret) {
+			NETIF_ERROR(adapter, ifup, adapter->netdev,
+				    "request_irq failed, ret = %d", ret);
+			goto clean_up;
+		}
+		intr->flags |= INTR_FLAG_IRQ_REQUESTED(0);
+		intr->number_of_vectors = 1;
+
+		/* enable interrupts */
+		lan743x_csr_write(adapter, INT_EN_SET, INT_BIT_MAS_);
+
+		ret = lan743x_intr_test_isr(adapter);
+		if (ret) {
+			NETIF_ERROR(adapter, ifup, adapter->netdev,
+				    "ISR test failed, irq = %d",
+				    intr->vector_list[0].irq);
+			goto clean_up;
+		} else {
+			NETIF_INFO(adapter, ifup, adapter->netdev,
+				   "irq = %d, passed ISR Test",
+				   intr->vector_list[0].irq);
+		}
+	}
+
+	intr->flags |= INTR_FLAG_OPENED;
+	ret = 0;
+
+clean_up:
+	if (ret)
+		lan743x_intr_close(adapter);
+	return ret;
+}
+
+static void lan743x_intr_close(struct lan743x_adapter *adapter)
+{
+	struct lan743x_intr *intr = &adapter->intr;
+	int index = 0;
+
+	intr->flags &= ~INTR_FLAG_OPENED;
+
+	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)) {
+			free_irq(intr->vector_list[index].irq,
+				 &intr->vector_list[index]);
+			intr->flags &= ~INTR_FLAG_IRQ_REQUESTED(index);
+		}
+	}
+	if ((intr->flags) & INTR_FLAG_MSI_ENABLED) {
+		pci_disable_msi(adapter->pci.pdev);
+		intr->flags &= ~INTR_FLAG_MSI_ENABLED;
+	}
+	if ((intr->flags) & INTR_FLAG_MSIX_ENABLED) {
+		pci_disable_msix(adapter->pci.pdev);
+		intr->flags &= ~INTR_FLAG_MSIX_ENABLED;
+	}
+}
+
+/* DP */
+static int lan743x_dp_init(struct lan743x_adapter *adapter)
+{
+	struct lan743x_dp *dp = &adapter->dp;
+
+	NETIF_ASSERT(adapter, probe, adapter->netdev, dp);
+	memset(dp, 0, sizeof(*dp));
+
+	mutex_init(&dp->lock);
+
+	return 0;
+}
+
+static void lan743x_dp_cleanup(struct lan743x_adapter *adapter)
+{
+	struct lan743x_dp *dp = &adapter->dp;
+
+	memset(dp, 0, sizeof(*dp));
+}
+
+static int lan743x_dp_open(struct lan743x_adapter *adapter)
+{
+	/* This empty function is kept as a place holder */
+	return 0;
+}
+
+static void lan743x_dp_close(struct lan743x_adapter *adapter)
+{
+	/* This empty function is kept as a place holder */
+}
+
+static int lan743x_dp_wait_till_not_busy(struct lan743x_adapter *adapter)
+{
+	int i;
+	u32 dp_sel = 0;
+
+	for (i = 0; i < 100; i++) {
+		dp_sel = lan743x_csr_read(adapter, DP_SEL);
+		if (dp_sel & DP_SEL_DPRDY_)
+			return 0;
+		usleep_range(40, 100);
+	}
+	NETIF_ERROR(adapter, drv, adapter->netdev,
+		    "Timed out waiting for data port not busy");
+	return -EIO;
+}
+
+static int lan743x_dp_write(struct lan743x_adapter *adapter,
+			    u32 select, u32 addr, u32 length, u32 *buf)
+{
+	struct lan743x_dp *dp = &adapter->dp;
+	int ret = -EIO;
+	int i;
+	u32 dp_sel;
+
+	NETIF_ASSERT(adapter, drv, adapter->netdev, buf);
+
+	mutex_lock(&dp->lock);
+
+	if (lan743x_dp_wait_till_not_busy(adapter))
+		goto done;
+
+	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_dp_wait_till_not_busy(adapter))
+			goto done;
+	}
+	ret = 0;
+
+done:
+	mutex_unlock(&dp->lock);
+	return ret;
+}
+
+static int lan743x_dp_write_hash_filter(struct lan743x_adapter *adapter,
+					u32 *hash_data)
+{
+	NETIF_ASSERT(adapter, drv, adapter->netdev, hash_data);
+
+	return lan743x_dp_write(adapter, DP_SEL_RFE_RAM,
+				DP_SEL_VHF_VLAN_LEN,
+				DP_SEL_VHF_HASH_LEN, hash_data);
+}
+
+/* GPIO */
+#define LAN743X_NUMBER_OF_GPIO          (12)
+
+static int lan743x_gpio_init(struct lan743x_adapter *adapter)
+{
+	struct lan743x_gpio *gpio = &adapter->gpio;
+
+	NETIF_ASSERT(adapter, probe, adapter->netdev, gpio);
+	memset(gpio, 0, sizeof(*gpio));
+
+	spin_lock_init(&gpio->gpio_lock);
+
+	gpio->gpio_cfg0 = 0; /* set all direction to input, data = 0 */
+	gpio->gpio_cfg1 = 0x0FFF0000;/* disable all gpio, set to open drain */
+	gpio->gpio_cfg2 = 0;/* set all to 1588 low polarity level */
+	gpio->gpio_cfg3 = 0;/* disable all 1588 output */
+	lan743x_csr_write(adapter, GPIO_CFG0, gpio->gpio_cfg0);
+	lan743x_csr_write(adapter, GPIO_CFG1, gpio->gpio_cfg1);
+	lan743x_csr_write(adapter, GPIO_CFG2, gpio->gpio_cfg2);
+	lan743x_csr_write(adapter, GPIO_CFG3, gpio->gpio_cfg3);
+
+	return 0;
+}
+
+static void lan743x_gpio_cleanup(struct lan743x_adapter *adapter)
+{
+	struct lan743x_gpio *gpio = &adapter->gpio;
+
+	memset(gpio, 0, sizeof(*gpio));
+}
+
+static int lan743x_gpio_open(struct lan743x_adapter *adapter)
+{
+	/* This empty function is kept as a place holder */
+	return 0;
+}
+
+static void lan743x_gpio_close(struct lan743x_adapter *adapter)
+{
+	/* This empty function is kept as a place holder */
+}
+
+#ifdef CONFIG_PTP_1588_CLOCK
+static int lan743x_gpio_reserve_ptp_output(struct lan743x_adapter *adapter,
+					   int bit, int ptp_channel)
+{
+	struct lan743x_gpio *gpio = &adapter->gpio;
+	int ret = -EBUSY;
+	unsigned long irq_flags = 0;
+	int bit_mask = BIT(bit);
+
+	NETIF_ASSERT(adapter, drv, adapter->netdev,
+		     (bit >= 0) && (bit < LAN743X_NUMBER_OF_GPIO));
+	spin_lock_irqsave(&gpio->gpio_lock, irq_flags);
+
+	if (!((gpio->used_bits) & bit_mask)) {
+		gpio->used_bits |= bit_mask;
+		gpio->output_bits |= bit_mask;
+		gpio->ptp_bits |= bit_mask;
+
+		/* set as output, and zero initial value */
+		gpio->gpio_cfg0 |= GPIO_CFG0_GPIO_DIR_(bit);
+		gpio->gpio_cfg0 &= ~GPIO_CFG0_GPIO_DATA_(bit);
+		lan743x_csr_write(adapter, GPIO_CFG0, gpio->gpio_cfg0);
+
+		/* enable gpio , and set buffer type to push pull */
+		gpio->gpio_cfg1 &= ~GPIO_CFG1_GPIOEN_(bit);
+		gpio->gpio_cfg1 |= GPIO_CFG1_GPIOBUF_(bit);
+		lan743x_csr_write(adapter, GPIO_CFG1, gpio->gpio_cfg1);
+
+		/* set 1588 polarity to high */
+		gpio->gpio_cfg2 |= GPIO_CFG2_1588_POL_(bit);
+		lan743x_csr_write(adapter, GPIO_CFG2, gpio->gpio_cfg2);
+
+		if (!ptp_channel) {
+			/* use channel A */
+			gpio->gpio_cfg3 &= ~GPIO_CFG3_1588_CH_SEL_(bit);
+		} else {
+			/* use channel B */
+			gpio->gpio_cfg3 |= GPIO_CFG3_1588_CH_SEL_(bit);
+		}
+		gpio->gpio_cfg3 |= GPIO_CFG3_1588_OE_(bit);
+		lan743x_csr_write(adapter, GPIO_CFG3, gpio->gpio_cfg3);
+
+		ret = bit;
+	} else {
+		NETIF_ERROR(adapter, drv, adapter->netdev,
+			    "GPIO %d is already in use", bit);
+	}
+	spin_unlock_irqrestore(&gpio->gpio_lock, irq_flags);
+	return ret;
+}
+#endif /* CONFIG_PTP_1588_CLOCK */
+
+#ifdef CONFIG_PTP_1588_CLOCK
+static void lan743x_gpio_release(struct lan743x_adapter *adapter, int bit)
+{
+	struct lan743x_gpio *gpio = &adapter->gpio;
+	unsigned long irq_flags = 0;
+	int bit_mask = BIT(bit);
+
+	NETIF_ASSERT(adapter, drv, adapter->netdev,
+		     (bit >= 0) && (bit < LAN743X_NUMBER_OF_GPIO));
+	spin_lock_irqsave(&gpio->gpio_lock, irq_flags);
+	if (gpio->used_bits & bit_mask) {
+		gpio->used_bits &= ~bit_mask;
+		if (gpio->output_bits & bit_mask) {
+			gpio->output_bits &= ~bit_mask;
+
+			if ((gpio->ptp_bits) & bit_mask) {
+				gpio->ptp_bits &= ~bit_mask;
+				/* disable ptp output */
+				gpio->gpio_cfg3 &= ~GPIO_CFG3_1588_OE_(bit);
+				lan743x_csr_write(adapter, GPIO_CFG3,
+						  gpio->gpio_cfg3);
+			}
+			/* release gpio output */
+
+			/* disable gpio */
+			gpio->gpio_cfg1 |= GPIO_CFG1_GPIOEN_(bit);
+			gpio->gpio_cfg1 &= ~GPIO_CFG1_GPIOBUF_(bit);
+			lan743x_csr_write(adapter, GPIO_CFG1, gpio->gpio_cfg1);
+
+			/* reset back to input */
+			gpio->gpio_cfg0 &= ~GPIO_CFG0_GPIO_DIR_(bit);
+			gpio->gpio_cfg0 &= ~GPIO_CFG0_GPIO_DATA_(bit);
+			lan743x_csr_write(adapter, GPIO_CFG0, gpio->gpio_cfg0);
+		} else {
+			NETIF_ERROR(adapter, drv, adapter->netdev,
+				    "Not Implemented, release gpio input");
+		}
+	} else {
+		NETIF_ERROR(adapter, drv, adapter->netdev,
+			    "GPIO %d is not used", bit);
+	}
+	spin_unlock_irqrestore(&gpio->gpio_lock, irq_flags);
+}
+#endif /* CONFIG_PTP_1588_CLOCK */
+
+/* PTP */
+#define LAN743X_PTP_MAX_FREQ_ADJ_IN_PPB (31249999)
+
+#define LAN743X_PTPCI_TO_PTP    \
+	(container_of(ptpci, struct lan743x_ptp, ptp_clock_info))
+#define LAN743X_PTP_TO_ADAPTER  \
+	(container_of(ptp, struct lan743x_adapter, ptp))
+
+#ifdef CONFIG_PTP_1588_CLOCK
+static int lan743x_ptp_reserve_event_ch(struct lan743x_adapter *adapter);
+static void lan743x_ptp_release_event_ch(struct lan743x_adapter *adapter,
+					 int event_channel);
+#endif
+
+#ifdef CONFIG_PTP_1588_CLOCK
+static int lan743x_ptpci_adjfreq(struct ptp_clock_info *ptpci, s32 delta_ppb)
+{
+	u32 u32_delta = 0;
+	u64 u64_delta = 0;
+	u32 lan743x_rate_adj = 0;
+	bool positive = true;
+	struct lan743x_ptp *ptp = LAN743X_PTPCI_TO_PTP;
+	struct lan743x_adapter *adapter = LAN743X_PTP_TO_ADAPTER;
+
+	if ((delta_ppb < (-LAN743X_PTP_MAX_FREQ_ADJ_IN_PPB)) ||
+	    (delta_ppb > LAN743X_PTP_MAX_FREQ_ADJ_IN_PPB)) {
+		NETIF_ERROR(adapter, drv, adapter->netdev,
+			    "delta_ppb = %d, out of range", delta_ppb);
+		return -EINVAL;
+	}
+	if (delta_ppb > 0) {
+		u32_delta = (u32)delta_ppb;
+		positive = true;
+	} else {
+		u32_delta = (u32)(-delta_ppb);
+		positive = false;
+	}
+	u64_delta = (((u64)u32_delta) * 0x800000000ULL);
+	lan743x_rate_adj = (u32)(u64_delta / 1000000000);
+	NETIF_ASSERT(adapter, drv, adapter->netdev,
+		     !(lan743x_rate_adj &
+		     (~PTP_CLOCK_RATE_ADJ_VALUE_MASK_)));
+
+	if (positive)
+		lan743x_rate_adj |= PTP_CLOCK_RATE_ADJ_DIR_;
+
+	lan743x_csr_write(LAN743X_PTP_TO_ADAPTER, PTP_CLOCK_RATE_ADJ,
+			  lan743x_rate_adj);
+
+	NETIF_INFO(adapter, drv, adapter->netdev,
+		   "adjfreq, delta_ppb = %d, lan743x_rate_adj = 0x%08X",
+		   delta_ppb, lan743x_rate_adj);
+	return 0;
+}
+#endif /*CONFIG_PTP_1588_CLOCK */
+
+#ifdef CONFIG_PTP_1588_CLOCK
+static int lan743x_ptpci_adjtime(struct ptp_clock_info *ptpci, s64 delta)
+{
+	struct lan743x_ptp *ptp = LAN743X_PTPCI_TO_PTP;
+	struct lan743x_adapter *adapter = LAN743X_PTP_TO_ADAPTER;
+
+	lan743x_ptp_clock_step(LAN743X_PTP_TO_ADAPTER, delta);
+	NETIF_INFO(adapter, drv, adapter->netdev,
+		   "adjtime, delta = %lld", delta);
+	return 0;
+}
+#endif /*CONFIG_PTP_1588_CLOCK */
+
+#ifdef CONFIG_PTP_1588_CLOCK
+static int lan743x_ptpci_gettime64(struct ptp_clock_info *ptpci,
+				   struct timespec64 *ts)
+{
+	struct lan743x_ptp *ptp = LAN743X_PTPCI_TO_PTP;
+	struct lan743x_adapter *adapter = LAN743X_PTP_TO_ADAPTER;
+
+	if (ts) {
+		u32 seconds = 0;
+		u32 nano_seconds = 0;
+
+		lan743x_ptp_clock_get(adapter, &seconds, &nano_seconds, NULL);
+		ts->tv_sec = seconds;
+		ts->tv_nsec = nano_seconds;
+		NETIF_INFO(adapter, drv, adapter->netdev,
+			   "gettime = %u.%09u", seconds, nano_seconds);
+	} else {
+		NETIF_WARNING(adapter, drv, adapter->netdev, "ts == NULL");
+		return -EINVAL;
+	}
+	return 0;
+}
+#endif /*CONFIG_PTP_1588_CLOCK */
+
+#ifdef CONFIG_PTP_1588_CLOCK
+static int lan743x_ptpci_settime64(struct ptp_clock_info *ptpci,
+				   const struct timespec64 *ts)
+{
+	struct lan743x_ptp *ptp = LAN743X_PTPCI_TO_PTP;
+	struct lan743x_adapter *adapter = LAN743X_PTP_TO_ADAPTER;
+
+	if (ts) {
+		u32 seconds = 0;
+		u32 nano_seconds = 0;
+
+		if ((ts->tv_sec > 0xFFFFFFFFLL) ||
+		    (ts->tv_sec < 0)) {
+			NETIF_WARNING(adapter, drv, adapter->netdev,
+				      "ts->tv_sec out of range, %ld",
+				      ts->tv_sec);
+			return -EINVAL;
+		}
+		if ((ts->tv_nsec >= 1000000000L) ||
+		    (ts->tv_nsec < 0)) {
+			NETIF_WARNING(adapter, drv, adapter->netdev,
+				      "ts->tv_nsec out of range, %ld",
+				      ts->tv_nsec);
+			return -EINVAL;
+		}
+		seconds = ts->tv_sec;
+		nano_seconds = ts->tv_nsec;
+		NETIF_INFO(adapter, drv, adapter->netdev,
+			   "settime = %u.%09u", seconds, nano_seconds);
+		lan743x_ptp_clock_set(adapter, seconds, nano_seconds, 0);
+	} else {
+		NETIF_WARNING(adapter, drv, adapter->netdev, "ts == NULL");
+		return -EINVAL;
+	}
+	return 0;
+}
+#endif /*CONFIG_PTP_1588_CLOCK */
+
+#ifdef CONFIG_PTP_1588_CLOCK
+static int lan743x_ptp_enable_pps(struct lan743x_adapter *adapter)
+{
+	struct lan743x_ptp *ptp = &adapter->ptp;
+	int result = -ENODEV;
+	u32 current_seconds = 0;
+	u32 target_seconds = 0;
+	u32 general_config = 0;
+
+	if (ptp->pps_event_ch >= 0) {
+		NETIF_INFO(adapter, drv, adapter->netdev, "PPS already ON");
+		result = 0;
+		goto done;
+	}
+
+	ptp->pps_event_ch = lan743x_ptp_reserve_event_ch(adapter);
+	if (ptp->pps_event_ch < 0) {
+		NETIF_WARNING(adapter, drv, adapter->netdev,
+			      "Failed to reserve event channel for PPS");
+		goto done;
+	}
+
+	NETIF_ASSERT(adapter, drv, adapter->netdev, ptp->pps_gpio_bit < 0);
+
+	ptp->pps_gpio_bit = lan743x_gpio_reserve_ptp_output(adapter, 0,
+							    ptp->pps_event_ch);
+
+	if (ptp->pps_gpio_bit < 0) {
+		NETIF_WARNING(adapter, drv, adapter->netdev,
+			      "Failed to reserve gpio 0 for PPS");
+		goto done;
+	}
+
+	lan743x_ptp_clock_get(adapter, &current_seconds, NULL, NULL);
+
+	/* set the first target ahead by 2 seconds
+	 *	to make sure its not missed
+	 */
+	target_seconds = current_seconds + 2;
+
+	/* set the new target */
+	lan743x_csr_write(adapter,
+			  PTP_CLOCK_TARGET_SEC_X(ptp->pps_event_ch),
+			  0xFFFF0000);
+	lan743x_csr_write(adapter,
+			  PTP_CLOCK_TARGET_NS_X(ptp->pps_event_ch), 0);
+
+	general_config = lan743x_csr_read(adapter,
+					  PTP_GENERAL_CONFIG);
+
+	general_config &= ~(PTP_GENERAL_CONFIG_CLOCK_EVENT_X_MASK_(
+			  ptp->pps_event_ch));
+	general_config |= PTP_GENERAL_CONFIG_CLOCK_EVENT_X_SET_(
+			  ptp->pps_event_ch,
+			  PTP_GENERAL_CONFIG_CLOCK_EVENT_100US_);
+	general_config &= ~PTP_GENERAL_CONFIG_RELOAD_ADD_X_(
+			  ptp->pps_event_ch);
+	lan743x_csr_write(adapter, PTP_GENERAL_CONFIG, general_config);
+
+	/* set the reload to one second steps */
+	lan743x_csr_write(adapter,
+			  PTP_CLOCK_TARGET_RELOAD_SEC_X(ptp->pps_event_ch),
+			  1);
+	lan743x_csr_write(adapter,
+			  PTP_CLOCK_TARGET_RELOAD_NS_X(ptp->pps_event_ch),
+			  0);
+
+	/* set the new target */
+	lan743x_csr_write(adapter,
+			  PTP_CLOCK_TARGET_SEC_X(ptp->pps_event_ch),
+			  target_seconds);
+	lan743x_csr_write(adapter,
+			  PTP_CLOCK_TARGET_NS_X(ptp->pps_event_ch),
+			  0);
+
+	NETIF_INFO(adapter, drv, adapter->netdev,
+		   "PPS enabled, channel = %d, gpio = %d",
+		   ptp->pps_event_ch, ptp->pps_gpio_bit);
+
+	result = 0;
+done:
+	if (result < 0) {
+		if (ptp->pps_gpio_bit >= 0) {
+			lan743x_gpio_release(adapter, ptp->pps_gpio_bit);
+			ptp->pps_gpio_bit = -1;
+		}
+		if (ptp->pps_event_ch >= 0) {
+			lan743x_ptp_release_event_ch(adapter,
+						     ptp->pps_event_ch);
+			ptp->pps_event_ch = -1;
+		}
+	}
+	return result;
+}
+#endif /* CONFIG_PTP_1588_CLOCK */
+
+#ifdef CONFIG_PTP_1588_CLOCK
+static void lan743x_ptp_disable_pps(struct lan743x_adapter *adapter)
+{
+	struct lan743x_ptp *ptp = &adapter->ptp;
+
+	if (ptp->pps_gpio_bit >= 0) {
+		lan743x_gpio_release(adapter, ptp->pps_gpio_bit);
+		ptp->pps_gpio_bit = -1;
+	}
+
+	if (ptp->pps_event_ch >= 0) {
+		u32 general_config = 0;
+
+		/* set target to far in the future, effectively disabling it */
+		lan743x_csr_write(adapter,
+				  PTP_CLOCK_TARGET_SEC_X(ptp->pps_event_ch),
+				  0xFFFF0000);
+		lan743x_csr_write(adapter,
+				  PTP_CLOCK_TARGET_NS_X(ptp->pps_event_ch), 0);
+
+		general_config = lan743x_csr_read(adapter, PTP_GENERAL_CONFIG);
+		general_config |= PTP_GENERAL_CONFIG_RELOAD_ADD_X_(
+				  ptp->pps_event_ch);
+		lan743x_csr_write(adapter, PTP_GENERAL_CONFIG, general_config);
+		lan743x_ptp_release_event_ch(adapter, ptp->pps_event_ch);
+		ptp->pps_event_ch = -1;
+	}
+}
+#endif /* CONFIG_PTP_1588_CLOCK */
+
+#ifdef CONFIG_PTP_1588_CLOCK
+static int lan743x_ptpci_enable(struct ptp_clock_info *ptpci,
+				struct ptp_clock_request *request, int on)
+{
+	struct lan743x_ptp *ptp = LAN743X_PTPCI_TO_PTP;
+	struct lan743x_adapter *adapter = NULL;
+
+	adapter = LAN743X_PTP_TO_ADAPTER;
+	if (request) {
+		switch (request->type) {
+		case PTP_CLK_REQ_EXTTS:
+			NETIF_INFO(adapter, drv, adapter->netdev,
+				   "request->type == PTP_CLK_REQ_EXTTS");
+			NETIF_INFO(adapter, drv, adapter->netdev,
+				   "request->extts.index = %d",
+				   request->extts.index);
+			NETIF_INFO(adapter, drv, adapter->netdev,
+				   "request->extts.flags = 0x%08X",
+				   request->extts.flags);
+			NETIF_INFO(adapter, drv, adapter->netdev,
+				   "on = %d", on);
+			return -EINVAL;
+		case PTP_CLK_REQ_PEROUT:
+			NETIF_INFO(adapter, drv, adapter->netdev,
+				   "request->type == PTP_CLK_REQ_PEROUT");
+			NETIF_INFO(adapter, drv, adapter->netdev,
+				   "on = %d", on);
+			{
+				NETIF_INFO(adapter, drv, adapter->netdev,
+					   "  start = %lld.%09u",
+					   request->perout.start.sec,
+					   request->perout.start.nsec);
+				NETIF_INFO(adapter, drv, adapter->netdev,
+					   "  period = %lld.%09u",
+					   request->perout.period.sec,
+					   request->perout.period.nsec);
+				NETIF_INFO(adapter, drv, adapter->netdev,
+					   "  index = %u",
+					   request->perout.index);
+			}
+			return -EINVAL;
+		case PTP_CLK_REQ_PPS:
+			if (on) {
+				if (lan743x_ptp_enable_pps(adapter) >= 0) {
+					NETIF_INFO(adapter, drv,
+						   adapter->netdev,
+						   "PPS is ON");
+				} else {
+					NETIF_WARNING(adapter, drv,
+						      adapter->netdev,
+						      "Error starting PPS");
+				}
+			} else {
+				lan743x_ptp_disable_pps(adapter);
+				NETIF_INFO(adapter, drv, adapter->netdev,
+					   "PPS is OFF");
+			}
+			break;
+		default:
+			NETIF_ERROR(adapter, drv, adapter->netdev,
+				    "request->type == %d, Unknown",
+				    request->type);
+			break;
+		}
+	} else {
+		NETIF_ERROR(adapter, drv, adapter->netdev, "request == NULL");
+	}
+	return 0;
+}
+#endif /* CONFIG_PTP_1588_CLOCK */
+
+static void lan743x_ptp_isr(void *context)
+{
+	int enable_flag = 1;
+	u32 ptp_int_sts = 0;
+	struct lan743x_adapter *adapter = (struct lan743x_adapter *)context;
+	struct lan743x_ptp *ptp = NULL;
+
+	NETIF_ASSERT(adapter, drv, adapter->netdev, adapter);
+	ptp = &adapter->ptp;
+
+	lan743x_csr_write(adapter, INT_EN_CLR, INT_BIT_1588_);
+
+	ptp_int_sts = lan743x_csr_read(adapter, PTP_INT_STS);
+	if (ptp_int_sts & PTP_INT_BIT_TX_TS_) {
+		tasklet_schedule(&ptp->ptp_isr_bottom_half);
+		enable_flag = 0;/* tasklet will re-enable later */
+	}
+	if (ptp_int_sts & PTP_INT_BIT_TX_SWTS_ERR_) {
+		NETIF_ERROR(adapter, drv, adapter->netdev,
+			    "PTP TX Software Timestamp Error");
+		/* clear int status bit */
+		lan743x_csr_write(adapter, PTP_INT_STS,
+				  PTP_INT_BIT_TX_SWTS_ERR_);
+	}
+	if (ptp_int_sts & PTP_INT_BIT_TIMER_B_) {
+		NETIF_INFO(adapter, drv, adapter->netdev,
+			   "PTP TIMER B Interrupt");
+		/* clear int status bit */
+		lan743x_csr_write(adapter, PTP_INT_STS,
+				  PTP_INT_BIT_TIMER_B_);
+	}
+	if (ptp_int_sts & PTP_INT_BIT_TIMER_A_) {
+		NETIF_INFO(adapter, drv, adapter->netdev,
+			   "PTP TIMER A Interrupt");
+		/* clear int status bit */
+		lan743x_csr_write(adapter, PTP_INT_STS,
+				  PTP_INT_BIT_TIMER_A_);
+	}
+
+	if (enable_flag) {
+		/* re-enable isr */
+		lan743x_csr_write(adapter, INT_EN_SET, INT_BIT_1588_);
+	}
+}
+
+static void lan743x_ptp_tx_ts_complete(struct lan743x_adapter *adapter)
+{
+	struct lan743x_ptp *ptp = &adapter->ptp;
+	int i;
+	int c;
+
+	mutex_lock(&ptp->tx_ts_lock);
+	c = ptp->tx_ts_skb_queue_size;
+
+	if (c > ptp->tx_ts_queue_size)
+		c = ptp->tx_ts_queue_size;
+	if (c <= 0)
+		goto done;
+
+	NETIF_ASSERT(adapter, drv, adapter->netdev,
+		     c <=
+		     LAN743X_PTP_NUMBER_OF_TX_TIMESTAMPS);
+	for (i = 0; i < c; i++) {
+		struct skb_shared_hwtstamps tstamps;
+		struct sk_buff *skb = ptp->tx_ts_skb_queue[i];
+		u32 seconds = ptp->tx_ts_seconds_queue[i];
+		u32 nseconds = ptp->tx_ts_nseconds_queue[i];
+
+		NETIF_ASSERT(adapter, drv,
+			     adapter->netdev, skb);
+
+		memset(&tstamps, 0, sizeof(tstamps));
+		tstamps.hwtstamp = ktime_set(seconds, nseconds);
+		skb_tstamp_tx(skb, &tstamps);
+		dev_kfree_skb(skb);
+
+		ptp->tx_ts_skb_queue[i] = NULL;
+		ptp->tx_ts_seconds_queue[i] = 0;
+		ptp->tx_ts_nseconds_queue[i] = 0;
+	}
+
+	/* shift queue */
+	for (i = c;
+	     i < LAN743X_PTP_NUMBER_OF_TX_TIMESTAMPS;
+	     i++) {
+		ptp->tx_ts_skb_queue[i - c] = ptp->tx_ts_skb_queue[i];
+		ptp->tx_ts_seconds_queue[i - c] = ptp->tx_ts_seconds_queue[i];
+		ptp->tx_ts_nseconds_queue[i - c] = ptp->tx_ts_nseconds_queue[i];
+
+		ptp->tx_ts_skb_queue[i] = NULL;
+		ptp->tx_ts_seconds_queue[i] = 0;
+		ptp->tx_ts_nseconds_queue[i] = 0;
+	}
+	ptp->tx_ts_skb_queue_size -= c;
+	ptp->tx_ts_queue_size -= c;
+done:
+	NETIF_ASSERT(adapter, drv, adapter->netdev,
+		     ptp->pending_tx_timestamps >= c);
+	ptp->pending_tx_timestamps -= c;
+	mutex_unlock(&ptp->tx_ts_lock);
+}
+
+static void lan743x_ptp_tx_ts_enqueue_skb(struct lan743x_adapter *adapter,
+					  struct sk_buff *skb)
+{
+	struct lan743x_ptp *ptp = &adapter->ptp;
+
+	NETIF_ASSERT(adapter, drv, adapter->netdev, skb);
+
+	mutex_lock(&ptp->tx_ts_lock);
+	if (ptp->tx_ts_skb_queue_size < LAN743X_PTP_NUMBER_OF_TX_TIMESTAMPS) {
+		NETIF_ASSERT(adapter, drv, adapter->netdev,
+			     !ptp->tx_ts_skb_queue[ptp->tx_ts_skb_queue_size]);
+		ptp->tx_ts_skb_queue[ptp->tx_ts_skb_queue_size] = skb;
+		ptp->tx_ts_skb_queue_size++;
+	} else {
+		/* this should never happen, so long as the tx channel
+		 * calls and honors the result from
+		 * lan743x_ptp_request_tx_timestamp
+		 */
+		NETIF_ERROR(adapter, drv, adapter->netdev,
+			    "tx ts skb queue overflow");
+		dev_kfree_skb(skb);
+	}
+	mutex_unlock(&ptp->tx_ts_lock);
+}
+
+static void lan743x_ptp_tx_ts_enqueue_ts(struct lan743x_adapter *adapter,
+					 u32 seconds, u32 nano_seconds)
+{
+	struct lan743x_ptp *ptp = &adapter->ptp;
+
+	mutex_lock(&ptp->tx_ts_lock);
+	if (ptp->tx_ts_queue_size < LAN743X_PTP_NUMBER_OF_TX_TIMESTAMPS) {
+		NETIF_ASSERT(adapter, drv, adapter->netdev,
+			     !ptp->tx_ts_seconds_queue[
+			     ptp->tx_ts_queue_size]);
+		ptp->tx_ts_seconds_queue[ptp->tx_ts_queue_size] = seconds;
+		NETIF_ASSERT(adapter, drv, adapter->netdev,
+			     !ptp->tx_ts_nseconds_queue[
+			     ptp->tx_ts_queue_size]);
+		ptp->tx_ts_nseconds_queue[ptp->tx_ts_queue_size] = nano_seconds;
+		ptp->tx_ts_queue_size++;
+	} else {
+		NETIF_ERROR(adapter, drv, adapter->netdev,
+			    "tx ts queue overflow");
+	}
+	mutex_unlock(&ptp->tx_ts_lock);
+}
+
+static void lan743x_ptp_isr_bottom_half(unsigned long param)
+{
+	struct lan743x_adapter *adapter = (struct lan743x_adapter *)param;
+	bool new_timestamp_available = false;
+
+	NETIF_ASSERT(adapter, drv, adapter->netdev, adapter);
+
+	while (lan743x_csr_read(adapter, PTP_INT_STS) & PTP_INT_BIT_TX_TS_) {
+		u32 cap_info = lan743x_csr_read(adapter, PTP_CAP_INFO);
+
+		if (PTP_CAP_INFO_TX_TS_CNT_GET_(cap_info) > 0) {
+			u32 seconds = lan743x_csr_read(adapter,
+						       PTP_TX_EGRESS_SEC);
+			u32 nsec = lan743x_csr_read(adapter, PTP_TX_EGRESS_NS);
+			u32 cause = (nsec &
+				    PTP_TX_EGRESS_NS_CAPTURE_CAUSE_MASK_);
+
+			if (cause == PTP_TX_EGRESS_NS_CAPTURE_CAUSE_SW_) {
+				nsec &= PTP_TX_EGRESS_NS_TS_NS_MASK_;
+				lan743x_ptp_tx_ts_enqueue_ts(
+					adapter, seconds, nsec);
+				new_timestamp_available = true;
+			} else if (cause ==
+				   PTP_TX_EGRESS_NS_CAPTURE_CAUSE_AUTO_) {
+				NETIF_ERROR(adapter, drv, adapter->netdev,
+					    "Auto capture cause not supported");
+			} else {
+				NETIF_WARNING(adapter, drv, adapter->netdev,
+					      "unknown tx timestamp capture cause");
+			}
+		} else {
+			NETIF_WARNING(adapter, drv, adapter->netdev,
+				      "TX TS INT but no TX TS CNT");
+		}
+		lan743x_csr_write(adapter, PTP_INT_STS, PTP_INT_BIT_TX_TS_);
+	}
+
+	if (new_timestamp_available)
+		lan743x_ptp_tx_ts_complete(adapter);
+
+	lan743x_csr_write(adapter, INT_EN_SET, INT_BIT_1588_);
+}
+
+static void lan743x_ptp_sync_to_system_clock(struct lan743x_adapter *adapter)
+{
+	struct timeval tv;
+
+	memset(&tv, 0, sizeof(tv));
+	do_gettimeofday(&tv);
+	lan743x_ptp_clock_set(adapter, tv.tv_sec, tv.tv_usec * 1000, 0);
+}
+
+static int lan743x_ptp_init(struct lan743x_adapter *adapter)
+{
+	struct lan743x_ptp *ptp = &adapter->ptp;
+
+	NETIF_ASSERT(adapter, drv, adapter->netdev, ptp);
+	memset(ptp, 0, sizeof(*ptp));
+
+	mutex_init(&ptp->command_lock);
+	mutex_init(&ptp->tx_ts_lock);
+
+	tasklet_init(&ptp->ptp_isr_bottom_half,
+		     lan743x_ptp_isr_bottom_half, (unsigned long)adapter);
+	tasklet_disable(&ptp->ptp_isr_bottom_half);
+
+	ptp->used_event_ch = 0;
+	ptp->pps_event_ch = -1;
+	ptp->pps_gpio_bit = -1;
+
+	return 0;
+}
+
+static void lan743x_ptp_cleanup(struct lan743x_adapter *adapter)
+{
+	struct lan743x_ptp *ptp = &adapter->ptp;
+
+	memset(ptp, 0, sizeof(*ptp));
+}
+
+static int lan743x_ptp_open(struct lan743x_adapter *adapter)
+{
+	struct lan743x_ptp *ptp = &adapter->ptp;
+	int ret = -ENODEV;
+
+	NETIF_ASSERT(adapter, drv, adapter->netdev,
+		     !ptp->pending_tx_timestamps);
+	NETIF_ASSERT(adapter, drv, adapter->netdev,
+		     !ptp->tx_ts_skb_queue_size);
+	NETIF_ASSERT(adapter, drv, adapter->netdev,
+		     !ptp->tx_ts_queue_size);
+
+	lan743x_ptp_reset(adapter);
+	lan743x_ptp_sync_to_system_clock(adapter);
+	lan743x_ptp_enable(adapter);
+
+	tasklet_enable(&ptp->ptp_isr_bottom_half);
+	lan743x_csr_write(adapter, INT_EN_SET, INT_BIT_1588_);
+	lan743x_csr_write(adapter, PTP_INT_EN_SET,
+			  PTP_INT_BIT_TX_SWTS_ERR_ | PTP_INT_BIT_TX_TS_);
+	ptp->flags |= PTP_FLAG_ISR_ENABLED;
+
+#ifdef CONFIG_PTP_1588_CLOCK
+	snprintf(ptp->pin_config[0].name, 32, "lan743x_ptp_pin_0");
+	ptp->pin_config[0].index = 0;
+	ptp->pin_config[0].func = PTP_PF_PEROUT;
+	ptp->pin_config[0].chan = 0;
+
+	ptp->ptp_clock_info.owner = THIS_MODULE;
+	snprintf(ptp->ptp_clock_info.name, 16, "%pm",
+		 adapter->netdev->dev_addr);
+	ptp->ptp_clock_info.max_adj = LAN743X_PTP_MAX_FREQ_ADJ_IN_PPB;
+	ptp->ptp_clock_info.n_alarm = 0;
+	ptp->ptp_clock_info.n_ext_ts = 0;
+	ptp->ptp_clock_info.n_per_out = 0;
+	ptp->ptp_clock_info.n_pins = 0;
+	ptp->ptp_clock_info.pps = 1;
+	ptp->ptp_clock_info.pin_config = NULL;
+	ptp->ptp_clock_info.adjfreq = lan743x_ptpci_adjfreq;
+	ptp->ptp_clock_info.adjtime = lan743x_ptpci_adjtime;
+	ptp->ptp_clock_info.gettime64 = lan743x_ptpci_gettime64;
+	ptp->ptp_clock_info.getcrosststamp = NULL;
+	ptp->ptp_clock_info.settime64 = lan743x_ptpci_settime64;
+	ptp->ptp_clock_info.enable = lan743x_ptpci_enable;
+	ptp->ptp_clock_info.verify = NULL;
+
+	ptp->ptp_clock = ptp_clock_register(&ptp->ptp_clock_info,
+					    &adapter->pci.pdev->dev);
+
+	if (IS_ERR(ptp->ptp_clock)) {
+		NETIF_ERROR(adapter, ifup, adapter->netdev,
+			    "ptp_clock_register failed");
+		goto done;
+	}
+	ptp->flags |= PTP_FLAG_PTP_CLOCK_REGISTERED;
+	NETIF_INFO(adapter, ifup, adapter->netdev,
+		   "successfully registered ptp clock");
+#endif
+
+	ret = 0;
+
+#ifdef CONFIG_PTP_1588_CLOCK
+done:
+	if (ret)
+		lan743x_ptp_close(adapter);
+#endif
+
+	return ret;
+}
+
+static void lan743x_ptp_close(struct lan743x_adapter *adapter)
+{
+	struct lan743x_ptp *ptp = &adapter->ptp;
+	int index;
+
+#ifdef CONFIG_PTP_1588_CLOCK
+	if (ptp->flags & PTP_FLAG_PTP_CLOCK_REGISTERED) {
+		NETIF_ASSERT(adapter, drv, adapter->netdev, ptp->ptp_clock);
+		ptp_clock_unregister(ptp->ptp_clock);
+		ptp->ptp_clock = NULL;
+		ptp->flags &= ~PTP_FLAG_PTP_CLOCK_REGISTERED;
+		NETIF_INFO(adapter, drv, adapter->netdev,
+			   "ptp clock unregister");
+	}
+#endif
+
+	if (ptp->flags & PTP_FLAG_ISR_ENABLED) {
+		lan743x_csr_write(adapter, PTP_INT_EN_CLR,
+				  PTP_INT_BIT_TX_SWTS_ERR_ |
+				  PTP_INT_BIT_TX_TS_);
+		lan743x_csr_write(adapter, INT_EN_CLR, INT_BIT_1588_);
+		tasklet_disable(&ptp->ptp_isr_bottom_half);
+		ptp->flags &= ~PTP_FLAG_ISR_ENABLED;
+	}
+
+	/* clean up pending timestamp requests */
+	lan743x_ptp_tx_ts_complete(adapter);
+	mutex_lock(&ptp->tx_ts_lock);
+	for (index = 0;
+	     index < LAN743X_PTP_NUMBER_OF_TX_TIMESTAMPS;
+	     index++) {
+		struct sk_buff *skb = ptp->tx_ts_skb_queue[index];
+
+		if (skb)
+			dev_kfree_skb(skb);
+		ptp->tx_ts_skb_queue[index] = NULL;
+		ptp->tx_ts_seconds_queue[index] = 0;
+		ptp->tx_ts_nseconds_queue[index] = 0;
+	}
+	ptp->tx_ts_skb_queue_size = 0;
+	ptp->tx_ts_queue_size = 0;
+	ptp->pending_tx_timestamps = 0;
+	mutex_unlock(&ptp->tx_ts_lock);
+
+	lan743x_ptp_disable(adapter);
+}
+
+static bool lan743x_ptp_is_enabled(struct lan743x_adapter *adapter)
+{
+	if (lan743x_csr_read(adapter, PTP_CMD_CTL) & PTP_CMD_CTL_PTP_ENABLE_)
+		return true;
+	return false;
+}
+
+static void lan743x_ptp_wait_till_cmd_done(struct lan743x_adapter *adapter,
+					   u32 bit_mask)
+{
+	int timeout = 1000;
+	u32 data = 0;
+
+	while (timeout && (data = (lan743x_csr_read(
+	       adapter, PTP_CMD_CTL) &
+	       bit_mask))) {
+		usleep_range(1000, 20000);
+		timeout--;
+	}
+	if (data) {
+		NETIF_ERROR(adapter, drv, adapter->netdev,
+			    "timeout waiting for cmd to be done, cmd = 0x%08X",
+			    bit_mask);
+	}
+}
+
+static void lan743x_ptp_enable(struct lan743x_adapter *adapter)
+{
+	struct lan743x_ptp *ptp = &adapter->ptp;
+
+	mutex_lock(&ptp->command_lock);
+
+	if (lan743x_ptp_is_enabled(adapter)) {
+		NETIF_WARNING(adapter, drv, adapter->netdev,
+			      "PTP already enabled");
+		goto done;
+	}
+	lan743x_csr_write(adapter, PTP_CMD_CTL, PTP_CMD_CTL_PTP_ENABLE_);
+done:
+	mutex_unlock(&ptp->command_lock);
+}
+
+static void lan743x_ptp_disable(struct lan743x_adapter *adapter)
+{
+	struct lan743x_ptp *ptp = &adapter->ptp;
+
+	mutex_lock(&ptp->command_lock);
+	if (!lan743x_ptp_is_enabled(adapter)) {
+		NETIF_WARNING(adapter, drv, adapter->netdev,
+			      "PTP already disabled");
+		goto done;
+	}
+
+	lan743x_csr_write(adapter, PTP_CMD_CTL,	PTP_CMD_CTL_PTP_DISABLE_);
+	lan743x_ptp_wait_till_cmd_done(adapter, PTP_CMD_CTL_PTP_ENABLE_);
+done:
+	mutex_unlock(&ptp->command_lock);
+}
+
+static void lan743x_ptp_reset(struct lan743x_adapter *adapter)
+{
+	struct lan743x_ptp *ptp = &adapter->ptp;
+
+	mutex_lock(&ptp->command_lock);
+
+	if (lan743x_ptp_is_enabled(adapter)) {
+		NETIF_ERROR(adapter, drv, adapter->netdev,
+			    "Attempting reset while enabled");
+		goto done;
+	}
+
+	lan743x_csr_write(adapter, PTP_CMD_CTL,	PTP_CMD_CTL_PTP_RESET_);
+	lan743x_ptp_wait_till_cmd_done(adapter, PTP_CMD_CTL_PTP_RESET_);
+done:
+	mutex_unlock(&ptp->command_lock);
+}
+
+#ifdef CONFIG_PTP_1588_CLOCK
+static int lan743x_ptp_reserve_event_ch(struct lan743x_adapter *adapter)
+{
+	struct lan743x_ptp *ptp = &adapter->ptp;
+	int index = 0;
+	int result = -ENODEV;
+
+	mutex_lock(&ptp->command_lock);
+	for (index = 0; index < LAN743X_PTP_NUMBER_OF_EVENT_CHANNELS; index++) {
+		if (!(test_bit(index, &ptp->used_event_ch))) {
+			ptp->used_event_ch |= BIT(index);
+			result = index;
+			break;
+		}
+	}
+	mutex_unlock(&ptp->command_lock);
+	return result;
+}
+#endif /* CONFIG_PTP_1588_CLOCK */
+
+#ifdef CONFIG_PTP_1588_CLOCK
+static void lan743x_ptp_release_event_ch(struct lan743x_adapter *adapter,
+					 int event_channel)
+{
+	struct lan743x_ptp *ptp = &adapter->ptp;
+
+	NETIF_ASSERT(adapter, drv, adapter->netdev,
+		     (event_channel >= 0) &&
+		     (event_channel < LAN743X_PTP_NUMBER_OF_EVENT_CHANNELS));
+	mutex_lock(&ptp->command_lock);
+	if (test_bit(event_channel, &ptp->used_event_ch)) {
+		ptp->used_event_ch &= ~BIT(event_channel);
+	} else {
+		NETIF_WARNING(adapter, drv, adapter->netdev,
+			      "attempted release on a not used event_channel = %d",
+			      event_channel);
+	}
+	mutex_unlock(&ptp->command_lock);
+}
+#endif /* CONFIG_PTP_1588_CLOCK */
+
+#ifdef CONFIG_PTP_1588_CLOCK
+static void lan743x_ptp_clock_get(struct lan743x_adapter *adapter,
+				  u32 *seconds, u32 *nano_seconds,
+				  u32 *sub_nano_seconds)
+{
+	struct lan743x_ptp *ptp = &adapter->ptp;
+
+	mutex_lock(&ptp->command_lock);
+
+	lan743x_csr_write(adapter, PTP_CMD_CTL, PTP_CMD_CTL_PTP_CLOCK_READ_);
+	lan743x_ptp_wait_till_cmd_done(adapter, PTP_CMD_CTL_PTP_CLOCK_READ_);
+
+	if (seconds)
+		(*seconds) = lan743x_csr_read(adapter, PTP_CLOCK_SEC);
+
+	if (nano_seconds)
+		(*nano_seconds) = lan743x_csr_read(adapter, PTP_CLOCK_NS);
+
+	if (sub_nano_seconds)
+		(*sub_nano_seconds) =
+			lan743x_csr_read(adapter, PTP_CLOCK_SUBNS);
+
+	mutex_unlock(&ptp->command_lock);
+}
+#endif /* CONFIG_PTP_1588_CLOCK */
+
+static void lan743x_ptp_clock_set(struct lan743x_adapter *adapter,
+				  u32 seconds, u32 nano_seconds,
+				  u32 sub_nano_seconds)
+{
+	struct lan743x_ptp *ptp = &adapter->ptp;
+
+	mutex_lock(&ptp->command_lock);
+
+	lan743x_csr_write(adapter, PTP_CLOCK_SEC, seconds);
+	lan743x_csr_write(adapter, PTP_CLOCK_NS, nano_seconds);
+	lan743x_csr_write(adapter, PTP_CLOCK_SUBNS, sub_nano_seconds);
+
+	lan743x_csr_write(adapter, PTP_CMD_CTL, PTP_CMD_CTL_PTP_CLOCK_LOAD_);
+	lan743x_ptp_wait_till_cmd_done(adapter, PTP_CMD_CTL_PTP_CLOCK_LOAD_);
+	mutex_unlock(&ptp->command_lock);
+}
+
+#ifdef CONFIG_PTP_1588_CLOCK
+static void lan743x_ptp_clock_step(struct lan743x_adapter *adapter,
+				   s64 time_step_ns)
+{
+	struct lan743x_ptp *ptp = &adapter->ptp;
+	u64 abs_time_step_ns = 0;
+	s32 seconds = 0;
+	u32 nano_seconds = 0;
+
+	if (time_step_ns >  15000000000LL) {
+		/* convert to clock set */
+		u32 seconds = 0;
+		u32 nano_seconds = 0;
+
+		lan743x_ptp_clock_get(adapter, &seconds, &nano_seconds, NULL);
+		seconds += (time_step_ns / 1000000000LL);
+		nano_seconds += (time_step_ns % 1000000000LL);
+		if (nano_seconds >= 1000000000) {
+			seconds++;
+			nano_seconds -= 1000000000;
+		}
+		lan743x_ptp_clock_set(adapter, seconds, nano_seconds, 0);
+		return;
+	} else if (time_step_ns < -15000000000LL) {
+		/* convert to clock set */
+		u32 seconds = 0;
+		u32 nano_seconds = 0;
+		u32 nano_seconds_step = 0;
+
+		lan743x_ptp_clock_get(adapter, &seconds, &nano_seconds, NULL);
+		seconds -= (time_step_ns / 1000000000LL);
+		nano_seconds_step = (time_step_ns % 1000000000LL);
+		if (nano_seconds < nano_seconds_step) {
+			seconds--;
+			nano_seconds += 1000000000;
+		}
+		nano_seconds -= nano_seconds_step;
+		lan743x_ptp_clock_set(adapter, seconds, nano_seconds, 0);
+		return;
+	}
+
+	/* do clock step */
+
+	if (time_step_ns >= 0) {
+		abs_time_step_ns = (u64)(time_step_ns);
+		seconds = (s32)(abs_time_step_ns / 1000000000);
+		nano_seconds = (u32)(abs_time_step_ns % 1000000000);
+	} else {
+		abs_time_step_ns = (u64)(-time_step_ns);
+		seconds = -((s32)(abs_time_step_ns / 1000000000));
+		nano_seconds = (u32)(abs_time_step_ns % 1000000000);
+		if (nano_seconds > 0) {
+			/* subtracting nano seconds is not allowed
+			 * convert to subtracting from seconds,
+			 * and adding to nanoseconds
+			 */
+			seconds--;
+			nano_seconds = (1000000000 - nano_seconds);
+		}
+	}
+
+	if (nano_seconds > 0) {
+		/* add 8 ns to cover the likely normal increment */
+		nano_seconds += 8;
+	}
+
+	if (nano_seconds >= 1000000000) {
+		/* carry into seconds */
+		seconds++;
+		nano_seconds -= 1000000000;
+	}
+
+	while (seconds) {
+		mutex_lock(&ptp->command_lock);
+		if (seconds > 0) {
+			u32 adjustment_value = (u32)seconds;
+
+			if (adjustment_value > 0xF)
+				adjustment_value = 0xF;
+			lan743x_csr_write(adapter, PTP_CLOCK_STEP_ADJ,
+					  PTP_CLOCK_STEP_ADJ_DIR_ |
+					  adjustment_value);
+			seconds -= ((s32)adjustment_value);
+		} else {
+			u32 adjustment_value = (u32)(-seconds);
+
+			if (adjustment_value > 0xF)
+				adjustment_value = 0xF;
+			lan743x_csr_write(adapter, PTP_CLOCK_STEP_ADJ,
+					  adjustment_value);
+			seconds += ((s32)adjustment_value);
+		}
+		lan743x_csr_write(adapter, PTP_CMD_CTL,
+				  PTP_CMD_CTL_PTP_CLOCK_STEP_SEC_);
+		lan743x_ptp_wait_till_cmd_done(adapter,
+					       PTP_CMD_CTL_PTP_CLOCK_STEP_SEC_);
+		mutex_unlock(&ptp->command_lock);
+	}
+	if (nano_seconds) {
+		NETIF_ASSERT(adapter, drv, adapter->netdev,
+			     nano_seconds < 1000000000);
+		mutex_lock(&ptp->command_lock);
+		lan743x_csr_write(adapter, PTP_CLOCK_STEP_ADJ,
+				  PTP_CLOCK_STEP_ADJ_DIR_ |
+				  (nano_seconds &
+				  PTP_CLOCK_STEP_ADJ_VALUE_MASK_));
+		lan743x_csr_write(adapter, PTP_CMD_CTL,
+				  PTP_CMD_CTL_PTP_CLK_STP_NSEC_);
+		lan743x_ptp_wait_till_cmd_done(adapter,
+					       PTP_CMD_CTL_PTP_CLK_STP_NSEC_);
+		mutex_unlock(&ptp->command_lock);
+	}
+}
+#endif /* CONFIG_PTP_1588_CLOCK */
+
+static bool lan743x_ptp_request_tx_timestamp(struct lan743x_adapter *adapter)
+{
+	struct lan743x_ptp *ptp = &adapter->ptp;
+	bool result = false;
+
+	mutex_lock(&ptp->tx_ts_lock);
+	if (ptp->pending_tx_timestamps < LAN743X_PTP_NUMBER_OF_TX_TIMESTAMPS) {
+		ptp->pending_tx_timestamps++;
+		result = true;/* request granted */
+	}
+	mutex_unlock(&ptp->tx_ts_lock);
+	return result;
+}
+
+static void lan743x_ptp_unrequest_tx_timestamp(struct lan743x_adapter *adapter)
+{
+	struct lan743x_ptp *ptp = &adapter->ptp;
+
+	mutex_lock(&ptp->tx_ts_lock);
+	if (ptp->pending_tx_timestamps > 0) {
+		ptp->pending_tx_timestamps--;
+	} else {
+		NETIF_ERROR(adapter, drv, adapter->netdev,
+			    "unrequest failed, pending_tx_timestamps==0");
+	}
+	mutex_unlock(&ptp->tx_ts_lock);
+}
+
+static void lan743x_ptp_tx_timestamp_skb(struct lan743x_adapter *adapter,
+					 struct sk_buff *skb)
+{
+	NETIF_ASSERT(adapter, drv, adapter->netdev, skb);
+	lan743x_ptp_tx_ts_enqueue_skb(adapter, skb);
+
+	lan743x_ptp_tx_ts_complete(adapter);
+}
+
+#ifdef CONFIG_PTP_1588_CLOCK
+static int lan743x_ptp_get_clock_index(struct lan743x_adapter *adapter)
+{
+	struct lan743x_ptp *ptp = &adapter->ptp;
+
+	if (ptp->ptp_clock)
+		return ptp_clock_index(ptp->ptp_clock);
+	return -1;
+}
+#endif /* CONFIG_PTP_1588_CLOCK */
+
+/* MAC */
+#define MAC_FLAG_MDIOBUS_ALLOCATED      BIT(0)
+#define MAC_FLAG_MDIOBUS_REGISTERED     BIT(1)
+
+static void lan743x_mac_isr(void *context)
+{
+	struct lan743x_adapter *adapter = (struct lan743x_adapter *)context;
+	struct lan743x_mac *mac = NULL;
+	u32 mac_int_sts = 0;
+	u32 mac_int_en = 0;
+
+	NETIF_ASSERT(adapter, drv, adapter->netdev, adapter);
+	mac = &adapter->mac;
+
+	/* disable isr */
+	lan743x_csr_write(adapter, INT_EN_CLR, INT_BIT_MAC_);
+
+	mac_int_sts = lan743x_csr_read(adapter, MAC_INT_STS);
+	mac_int_en = lan743x_csr_read(adapter, MAC_INT_EN_SET);
+	mac_int_sts = mac_int_sts & mac_int_en;
+	if (mac_int_sts & MAC_INT_BIT_MAC_ERR_) {
+		u32 err_sts = lan743x_csr_read(adapter, MAC_ERR_STS);
+
+		if (err_sts & MAC_ERR_STS_RESERVED_)
+			NETIF_ERROR(adapter, drv, adapter->netdev,
+				    "Reserved ERROR, err_sts = 0x%08X",
+				    err_sts);
+		if (err_sts & MAC_ERR_STS_LEN_ERR_)
+			NETIF_ERROR(adapter, drv, adapter->netdev,
+				    "Length Field Error");
+		if (err_sts & MAC_ERR_STS_RXERR_)
+			NETIF_ERROR(adapter, drv, adapter->netdev, "RX Error");
+		if (err_sts & MAC_ERR_STS_LFERR_)
+			NETIF_ERROR(adapter, drv, adapter->netdev,
+				    "Large Frame Error");
+		if (err_sts & MAC_ERR_STS_RWTERR_)
+			NETIF_ERROR(adapter, drv, adapter->netdev,
+				    "Receive Watchdog Timer Expired");
+		if (err_sts & MAC_ERR_STS_ECERR_)
+			NETIF_ERROR(adapter, drv, adapter->netdev,
+				    "Excessive Collision Error");
+		if (err_sts & MAC_ERR_STS_URERR_)
+			NETIF_ERROR(adapter, drv, adapter->netdev,
+				    "Under Run Error");
+
+		/* clear error bits */
+		lan743x_csr_write(adapter, MAC_ERR_STS, err_sts);
+	}
+	if (mac_int_sts & (~MAC_INT_BIT_MAC_ERR_))
+		NETIF_WARNING(adapter, drv, adapter->netdev,
+			      "Unhandled MAC Interrupt");
+
+	/* clear mac int status bits */
+	lan743x_csr_write(adapter, MAC_INT_STS, mac_int_sts);
+
+	/* enable isr */
+	lan743x_csr_write(adapter, INT_EN_SET, INT_BIT_MAC_);
+}
+
+static int lan743x_mdiobus_read(struct mii_bus *bus, int phy_id, int index);
+static int lan743x_mdiobus_write(struct mii_bus *bus, int phy_id, int index,
+				 u16 regval);
+
+static int lan743x_mac_reset(struct lan743x_adapter *adapter)
+{
+	u32 data = 0;
+	int timeout = 100;
+
+	lan743x_csr_write(adapter, MAC_CR, MAC_CR_RST_);
+	while (timeout &&
+	       ((data = lan743x_csr_read(adapter, MAC_CR)) & MAC_CR_RST_)) {
+		usleep_range(1000, 20000);
+		timeout--;
+	}
+	if (data & MAC_CR_RST_) {
+		NETIF_ERROR(adapter, drv, adapter->netdev,
+			    "timed out waiting for mac reset to finish");
+		return -EIO;
+	}
+	return 0;
+}
+
+static int lan743x_mac_init(struct lan743x_adapter *adapter)
+{
+	struct lan743x_mac *mac = &adapter->mac;
+	struct net_device *netdev;
+	u32 data;
+	int ret = -ENODEV;
+	u32 mac_addr_hi = 0;
+	u32 mac_addr_lo = 0;
+	bool mac_address_valid = true;
+
+	NETIF_ASSERT(adapter, probe, adapter->netdev, mac);
+
+	memset(mac, 0, sizeof(*mac));
+
+	netdev = adapter->netdev;
+
+	ret = lan743x_mac_reset(adapter);
+	if (ret) {
+		NETIF_ERROR(adapter, probe, adapter->netdev,
+			    "mac reset failed");
+		goto clean_up;
+	}
+
+	/* setup auto duplex, and speed detection */
+	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);
+
+	mutex_init(&mac->tx_mutex);
+	mac->tx_enable_bits = 0;
+	mutex_init(&mac->rx_mutex);
+	mac->rx_enable_bits = 0;
+
+	mac->mdiobus = mdiobus_alloc();
+	if (!(mac->mdiobus)) {
+		NETIF_ERROR(adapter, probe, adapter->netdev,
+			    "mdiobus_alloc failed");
+		ret = -ENOMEM;
+		goto clean_up;
+	}
+	mac->flags |= MAC_FLAG_MDIOBUS_ALLOCATED;
+
+	mutex_init(&mac->mii_mutex);
+	mac->mdiobus->priv = (void *)adapter;
+	mac->mdiobus->read = lan743x_mdiobus_read;
+	mac->mdiobus->write = lan743x_mdiobus_write;
+	mac->mdiobus->name = "lan743x-mdiobus";
+
+	snprintf(mac->mdiobus->id, MII_BUS_ID_SIZE,
+		 "pci-%s", pci_name(adapter->pci.pdev));
+
+	/* set to internal PHY id */
+	mac->mdiobus->phy_mask = ~(1 << 1);
+
+	/* register mdiobus */
+	ret = mdiobus_register(mac->mdiobus);
+	if (ret < 0) {
+		NETIF_ERROR(adapter, probe, adapter->netdev,
+			    "failed to register MDIO bus");
+		goto clean_up;
+	}
+	NETIF_INFO(adapter, probe, adapter->netdev,
+		   "successfully registered MDIO bus, %s", mac->mdiobus->id);
+	mac->flags |= MAC_FLAG_MDIOBUS_REGISTERED;
+
+	mac_addr_hi = lan743x_csr_read(adapter, MAC_RX_ADDRH);
+	mac_addr_lo = lan743x_csr_read(adapter, MAC_RX_ADDRL);
+	mac->mac_address[0] = mac_addr_lo & 0xFF;
+	mac->mac_address[1] = (mac_addr_lo >> 8) & 0xFF;
+	mac->mac_address[2] = (mac_addr_lo >> 16) & 0xFF;
+	mac->mac_address[3] = (mac_addr_lo >> 24) & 0xFF;
+	mac->mac_address[4] = mac_addr_hi & 0xFF;
+	mac->mac_address[5] = (mac_addr_hi >> 8) & 0xFF;
+
+	if (((mac_addr_hi & 0x0000FFFF) == 0x0000FFFF) &&
+	    (mac_addr_lo == 0xFFFFFFFF)) {
+		NETIF_INFO(adapter, probe, adapter->netdev,
+			   "MAC address not available from EEPROM or OTP");
+		mac_address_valid = false;
+	} else if (!is_valid_ether_addr(mac->mac_address)) {
+		NETIF_WARNING(adapter, probe, adapter->netdev,
+			      "MAC address is not valid");
+		mac_address_valid = false;
+	}
+
+	if (!mac_address_valid) {
+		random_ether_addr(mac->mac_address);
+		NETIF_INFO(adapter, probe, adapter->netdev,
+			   "MAC address set to random address");
+		mac_addr_lo = mac->mac_address[0] |
+			      (mac->mac_address[1] << 8) |
+			      (mac->mac_address[2] << 16) |
+			      (mac->mac_address[3] << 24);
+		mac_addr_hi = mac->mac_address[4] |
+			      (mac->mac_address[5] << 8);
+	}
+
+	lan743x_csr_write(adapter, MAC_RX_ADDRL, mac_addr_lo);
+	lan743x_csr_write(adapter, MAC_RX_ADDRH, mac_addr_hi);
+	NETIF_INFO(adapter, probe, adapter->netdev,
+		   "MAC Address = %02X:%02X:%02X:%02X:%02X:%02X",
+		   mac->mac_address[0], mac->mac_address[1],
+		   mac->mac_address[2], mac->mac_address[3],
+		   mac->mac_address[4], mac->mac_address[5]);
+
+	ether_addr_copy(netdev->dev_addr, mac->mac_address);
+
+	ret = 0;
+
+clean_up:
+	if (ret)
+		lan743x_mac_cleanup(adapter);
+	return ret;
+}
+
+static void lan743x_mac_cleanup(struct lan743x_adapter *adapter)
+{
+	struct lan743x_mac *mac = &adapter->mac;
+
+	if (mac->tx_enable_bits) {
+		NETIF_ERROR(adapter, drv, adapter->netdev,
+			    "Some TX channels have not been disabled");
+	}
+	if (mac->rx_enable_bits) {
+		NETIF_ERROR(adapter, drv, adapter->netdev,
+			    "Some RX Channels have not been disabled");
+	}
+
+	if (mac->flags & MAC_FLAG_MDIOBUS_REGISTERED) {
+		mdiobus_unregister(mac->mdiobus);
+		mac->flags &= ~MAC_FLAG_MDIOBUS_REGISTERED;
+	}
+
+	if (mac->flags & MAC_FLAG_MDIOBUS_ALLOCATED) {
+		NETIF_ASSERT(adapter, drv, adapter->netdev, mac->mdiobus);
+		mdiobus_free(mac->mdiobus);
+		mac->mdiobus = NULL;
+		mac->flags &= ~MAC_FLAG_MDIOBUS_ALLOCATED;
+	}
+
+	memset(mac, 0, sizeof(*mac));
+}
+
+static int lan743x_mac_open(struct lan743x_adapter *adapter)
+{
+	lan743x_csr_write(adapter, INT_EN_SET, INT_BIT_MAC_);
+	lan743x_csr_write(adapter, MAC_INT_EN_SET, MAC_INT_BIT_MAC_ERR_);
+
+	return 0;
+}
+
+static void lan743x_mac_close(struct lan743x_adapter *adapter)
+{
+	lan743x_csr_write(adapter, MAC_INT_EN_CLR, MAC_INT_BIT_MAC_ERR_);
+	lan743x_csr_write(adapter, INT_EN_CLR, INT_BIT_MAC_);
+}
+
+static void lan743x_mac_get_address(struct lan743x_adapter *adapter,
+				    u8 *mac_addr)
+{
+	struct lan743x_mac *mac = &adapter->mac;
+
+	NETIF_ASSERT(adapter, drv, adapter->netdev, mac_addr);
+	ether_addr_copy(mac_addr, mac->mac_address);
+}
+
+#define MAC_MII_READ            1
+#define MAC_MII_WRITE           0
+static inline u32 lan743x_mac_mii_access(int id, int index, int read)
+{
+	u32 ret;
+
+	ret = ((u32)id << MAC_MII_ACC_PHY_ADDR_SHIFT_) &
+	      MAC_MII_ACC_PHY_ADDR_MASK_;
+	ret |= ((u32)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)
+{
+	unsigned long start_time = jiffies;
+	u32 data;
+
+	do {
+		data = lan743x_csr_read(adapter, MAC_MII_ACC);
+
+		if (!(data & MAC_MII_ACC_MII_BUSY_))
+			return 0;
+	} while (!time_after(jiffies, start_time + HZ));
+
+	NETIF_ERROR(adapter, drv, adapter->netdev, "mii is busy");
+	return -EIO;
+}
+
+static int lan743x_mac_mii_read(struct lan743x_adapter *adapter,
+				int phy_id, int index)
+{
+	struct lan743x_mac *mac = &adapter->mac;
+	u32 val, addr;
+	int ret;
+
+	mutex_lock(&mac->mii_mutex);
+
+	/* comfirm MII not busy */
+	ret = lan743x_mac_mii_wait_till_not_busy(adapter);
+	if (ret < 0)
+		goto done;
+
+	/* set the address, index & direction (read from PHY) */
+	addr = lan743x_mac_mii_access(phy_id, index, MAC_MII_READ);
+	lan743x_csr_write(adapter, MAC_MII_ACC, addr);
+
+	ret = lan743x_mac_mii_wait_till_not_busy(adapter);
+	if (ret < 0)
+		goto done;
+
+	val = lan743x_csr_read(adapter, MAC_MII_DATA);
+
+	ret = (int)(val & 0xFFFF);
+
+done:
+	mutex_unlock(&mac->mii_mutex);
+#if (LAN743X_PHY_TRACE_ENABLE != 0)
+	NETIF_INFO(adapter, drv, adapter->netdev,
+		   "MII READ: phy_id = %d, index = %d, value = 0x%04X",
+		   phy_id, index, ret);
+#endif
+	return ret;
+}
+
+static int lan743x_mdiobus_read(struct mii_bus *bus, int phy_id, int index)
+{
+	struct lan743x_adapter *adapter = bus->priv;
+
+	return lan743x_mac_mii_read(adapter, phy_id, index);
+}
+
+static int lan743x_mac_mii_write(struct lan743x_adapter *adapter,
+				 int phy_id, int index, u16 regval)
+{
+	struct lan743x_mac *mac = &adapter->mac;
+	u32 val, addr;
+	int ret;
+
+#if (LAN743X_PHY_TRACE_ENABLE != 0)
+	NETIF_INFO(adapter, drv, adapter->netdev,
+		   "MII WRITE: phy_id = %d, index = %d, value = 0x%04X",
+		   phy_id, index, regval);
+#endif
+
+	mutex_lock(&mac->mii_mutex);
+
+	/* confirm MII not busy */
+	ret = lan743x_mac_mii_wait_till_not_busy(adapter);
+	if (ret < 0)
+		goto done;
+
+	val = (u32)regval;
+	lan743x_csr_write(adapter, MAC_MII_DATA, val);
+
+	/* set the address, index & direction (write to PHY) */
+	addr = lan743x_mac_mii_access(phy_id, index, MAC_MII_WRITE);
+	lan743x_csr_write(adapter, MAC_MII_ACC, addr);
+
+	ret = lan743x_mac_mii_wait_till_not_busy(adapter);
+
+done:
+	mutex_unlock(&mac->mii_mutex);
+	return ret;
+}
+
+static int lan743x_mdiobus_write(struct mii_bus *bus,
+				 int phy_id, int index, u16 regval)
+{
+	struct lan743x_adapter *adapter = bus->priv;
+
+	return lan743x_mac_mii_write(adapter, phy_id, index, regval);
+}
+
+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_tx_enable_all(struct lan743x_adapter *adapter)
+{
+	u32 data = 0;
+
+	data = lan743x_csr_read(adapter, MAC_TX);
+	if (data & MAC_TX_TXEN_) {
+		NETIF_WARNING(adapter, drv, adapter->netdev,
+			      "Attempted to enable mac tx, when already enabled");
+		goto done;
+	}
+
+	lan743x_csr_write(adapter, MAC_TX, data | MAC_TX_TXEN_);
+
+done:
+	return 0;
+}
+
+static int lan743x_mac_tx_disable_all(struct lan743x_adapter *adapter)
+{
+	int ret = 0;
+	u32 data = 0;
+	int timeout = 100;
+
+	data = lan743x_csr_read(adapter, MAC_TX);
+	if (!(data & MAC_TX_TXEN_)) {
+		NETIF_WARNING(adapter, drv, adapter->netdev,
+			      "Attempted to disable mac tx, when already disabled");
+		ret = 0;
+		goto done;
+	}
+	if (data & MAC_TX_TXD_) {
+		NETIF_WARNING(adapter, drv, adapter->netdev,
+			      "TXD unexpectedly set, clearing now");
+		lan743x_csr_write(adapter, MAC_TX, data);
+		data &= ~MAC_TX_TXD_;
+	}
+	data &= ~MAC_TX_TXEN_;
+	lan743x_csr_write(adapter, MAC_TX, data);
+	while (timeout &&
+	       (!((data = lan743x_csr_read(adapter, MAC_TX)) & MAC_TX_TXD_))) {
+		usleep_range(1000, 20000);
+		timeout--;
+	}
+	if (!(data & MAC_TX_TXD_)) {
+		NETIF_ERROR(adapter, drv, adapter->netdev,
+			    "timed out waiting for mac to disable tx");
+		ret = -EIO;
+	} else {
+		/* clear TXD */
+		lan743x_csr_write(adapter, MAC_TX, data);
+	}
+	ret = 0;
+done:
+	return ret;
+}
+
+static int lan743x_mac_tx_enable(struct lan743x_adapter *adapter,
+				 int tx_channel)
+{
+	struct lan743x_mac *mac = &adapter->mac;
+	int ret = 0;
+
+	NETIF_ASSERT(adapter, drv, adapter->netdev, (tx_channel >= 0) &&
+		     (tx_channel < LAN743X_NUMBER_OF_TX_CHANNELS));
+	mutex_lock(&mac->tx_mutex);
+	if (test_bit(tx_channel, &mac->tx_enable_bits)) {
+		NETIF_ERROR(adapter, drv, adapter->netdev,
+			    "attempting to enable an already enabled tx channel = %d",
+			    tx_channel);
+		goto done;
+	}
+	if (!mac->tx_enable_bits) {
+		ret = lan743x_mac_tx_enable_all(adapter);
+		if (ret) {
+			NETIF_ERROR(adapter, drv, adapter->netdev,
+				    "Failed to enable mac");
+			goto done;
+		}
+	}
+	mac->tx_enable_bits |= BIT(tx_channel);
+	ret = 0;
+done:
+	mutex_unlock(&mac->tx_mutex);
+	return ret;
+}
+
+static int lan743x_mac_tx_disable(struct lan743x_adapter *adapter,
+				  int tx_channel)
+{
+	struct lan743x_mac *mac = &adapter->mac;
+	int ret = 0;
+
+	NETIF_ASSERT(adapter, drv, adapter->netdev, (tx_channel >= 0) &&
+		     (tx_channel < LAN743X_NUMBER_OF_TX_CHANNELS));
+	mutex_lock(&mac->tx_mutex);
+	if (!(test_bit(tx_channel, &mac->tx_enable_bits))) {
+		NETIF_ERROR(adapter, drv, adapter->netdev,
+			    "attempting to disable an already disabled tx channel = %d",
+			    tx_channel);
+		goto done;
+	}
+	mac->tx_enable_bits &= ~BIT(tx_channel);
+	if (!mac->tx_enable_bits) {
+		ret = lan743x_mac_tx_disable_all(adapter);
+		if (ret) {
+			NETIF_ERROR(adapter, drv, adapter->netdev,
+				    "Failed to disable mac");
+			goto done;
+		}
+	}
+	ret = 0;
+done:
+	mutex_unlock(&mac->tx_mutex);
+	return ret;
+}
+
+static int lan743x_mac_rx_enable_all(struct lan743x_adapter *adapter)
+{
+	u32 data = 0;
+
+	data = lan743x_csr_read(adapter, MAC_RX);
+	if (data & MAC_RX_RXEN_) {
+		NETIF_WARNING(adapter, drv, adapter->netdev,
+			      "Attempted to enable mac rx, when already enabled");
+		goto done;
+	}
+
+	lan743x_csr_write(adapter, MAC_RX, data | MAC_RX_RXEN_);
+
+done:
+	return 0;
+}
+
+static int lan743x_mac_rx_disable_all(struct lan743x_adapter *adapter)
+{
+	int ret = 0;
+	u32 data = 0;
+	int timeout = 100;
+
+	data = lan743x_csr_read(adapter, MAC_RX);
+	if (!(data & MAC_RX_RXEN_)) {
+		NETIF_WARNING(adapter, drv, adapter->netdev,
+			      "Attempted to disable mac rx, when already disabled");
+		ret = 0;
+		goto done;
+	}
+	if (data & MAC_RX_RXD_) {
+		NETIF_WARNING(adapter, drv, adapter->netdev,
+			      "RXD unexpectedly set, clearing now");
+		lan743x_csr_write(adapter, MAC_RX, data);
+		data &= ~MAC_RX_RXD_;
+	}
+	data &= ~MAC_RX_RXEN_;
+	lan743x_csr_write(adapter, MAC_RX, data);
+	while (timeout &&
+	       (!((data = lan743x_csr_read(adapter, MAC_RX)) & MAC_RX_RXD_))) {
+		usleep_range(1000, 20000);
+		timeout--;
+	}
+	if (!(data & MAC_RX_RXD_)) {
+		NETIF_ERROR(adapter, drv, adapter->netdev,
+			    "timed out waiting for mac to disable rx");
+		ret = -EIO;
+	} else {
+		/* clear RXD */
+		lan743x_csr_write(adapter, MAC_RX, data);
+	}
+	ret = 0;
+done:
+	return ret;
+}
+
+static int lan743x_mac_rx_enable(struct lan743x_adapter *adapter,
+				 int rx_channel)
+{
+	struct lan743x_mac *mac = &adapter->mac;
+	int ret = 0;
+
+	NETIF_ASSERT(adapter, drv, adapter->netdev, (rx_channel >= 0) &&
+		     (rx_channel < LAN743X_NUMBER_OF_RX_CHANNELS));
+	mutex_lock(&mac->rx_mutex);
+	if (test_bit(rx_channel, &mac->rx_enable_bits)) {
+		NETIF_ERROR(adapter, drv, adapter->netdev,
+			    "attempting to enable an already enabled rx channel = %d",
+			    rx_channel);
+		goto done;
+	}
+	if (!mac->rx_enable_bits) {
+		ret = lan743x_mac_rx_enable_all(adapter);
+		if (ret) {
+			NETIF_ERROR(adapter, drv, adapter->netdev,
+				    "Failed to enable mac");
+			goto done;
+		}
+	}
+	mac->rx_enable_bits |= BIT(rx_channel);
+	ret = 0;
+done:
+	mutex_unlock(&mac->rx_mutex);
+	return ret;
+}
+
+static int lan743x_mac_rx_disable(struct lan743x_adapter *adapter,
+				  int rx_channel)
+{
+	struct lan743x_mac *mac = &adapter->mac;
+	int ret = 0;
+
+	NETIF_ASSERT(adapter, drv, adapter->netdev, (rx_channel >= 0) &&
+		     (rx_channel < LAN743X_NUMBER_OF_RX_CHANNELS));
+	mutex_lock(&mac->rx_mutex);
+	if (!(test_bit(rx_channel, &mac->rx_enable_bits))) {
+		NETIF_ERROR(adapter, drv, adapter->netdev,
+			    "attempting to disable an already disabled rx channel = %d",
+			    rx_channel);
+		goto done;
+	}
+	mac->rx_enable_bits &= ~BIT(rx_channel);
+	if (!mac->rx_enable_bits) {
+		ret = lan743x_mac_rx_disable_all(adapter);
+		if (ret) {
+			NETIF_ERROR(adapter, drv, adapter->netdev,
+				    "Failed to disable mac");
+			goto done;
+		}
+	}
+	ret = 0;
+done:
+	mutex_unlock(&mac->rx_mutex);
+	return ret;
+}
+
+static int lan743x_mac_set_mtu(struct lan743x_adapter *adapter, int new_mtu)
+{
+	struct lan743x_mac *mac = &adapter->mac;
+	int ret = 0;
+	u32 mac_rx = 0;
+
+	if (new_mtu > LAN743X_MAX_FRAME_SIZE)
+		return -EINVAL;
+	if (new_mtu <= 0)
+		return -EINVAL;
+
+	mutex_lock(&mac->rx_mutex);
+	if (mac->rx_enable_bits) {
+		ret = lan743x_mac_rx_disable_all(adapter);
+		if (ret) {
+			NETIF_ERROR(adapter, drv, adapter->netdev,
+				    "Failed to disable mac");
+			goto done;
+		}
+	}
+
+	mac_rx = lan743x_csr_read(adapter, MAC_RX);
+	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 (mac->rx_enable_bits) {
+		ret = lan743x_mac_rx_enable_all(adapter);
+		if (ret) {
+			NETIF_ERROR(adapter, drv, adapter->netdev,
+				    "Failed to enable mac");
+			goto done;
+		}
+	}
+done:
+	mutex_unlock(&mac->rx_mutex);
+	return ret;
+}
+
+static struct net_device_stats *mac_get_stats(struct lan743x_adapter *adapter)
+{
+	struct lan743x_mac *mac = &adapter->mac;
+
+	memset(&mac->statistics, 0, sizeof(mac->statistics));
+	mac->statistics.rx_packets = lan743x_csr_read(adapter,
+						      STAT_RX_TOTAL_FRAMES);
+	mac->statistics.tx_packets = lan743x_csr_read(adapter,
+						      STAT_TX_TOTAL_FRAMES);
+	return &mac->statistics;
+}
+
+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.mac_address, addr);
+
+	NETIF_INFO(adapter, drv, adapter->netdev,
+		   "MAC address set to %02X:%02X:%02X:%02X:%02X:%02X",
+		   addr[0], addr[1], addr[2], addr[3], addr[4], addr[5]);
+}
+
+/* PHY */
+
+#define PHY_FLAG_OPENED     BIT(0)
+#define PHY_FLAG_ATTACHED   BIT(1)
+
+static int lan743x_phy_reset(struct lan743x_adapter *adapter)
+{
+	int ret = -EIO;
+	u32 data;
+	unsigned long timeout;
+
+	data = lan743x_csr_read(adapter, PMT_CTL);
+	data |= PMT_CTL_ETH_PHY_RST_;
+	lan743x_csr_write(adapter, PMT_CTL, data);
+
+	timeout = jiffies + HZ;
+
+	do {
+		if (time_after(jiffies, timeout)) {
+			NETIF_ERROR(adapter, drv, adapter->netdev,
+				    "timeout, incomplete phy reset");
+			ret = -EIO;
+			goto done;
+		}
+		msleep(50);
+		data = lan743x_csr_read(adapter, PMT_CTL);
+	} while ((data & PMT_CTL_ETH_PHY_RST_) || !(data & PMT_CTL_READY_));
+
+	ret = 0;
+done:
+	return ret;
+}
+
+static void lan743x_phy_update_flowcontrol(struct lan743x_adapter *adapter,
+					   u8 duplex, 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);
+
+	NETIF_INFO(adapter, drv, adapter->netdev, "rx pause %s, tx pause %s",
+		   (cap & FLOW_CTRL_RX ? "enabled" : "disabled"),
+		   (cap & FLOW_CTRL_TX ? "enabled" : "disabled"));
+}
+
+static int lan743x_phy_init(struct lan743x_adapter *adapter)
+{
+	struct lan743x_phy *phy = &adapter->phy;
+	int ret = -ENODEV;
+	struct net_device *netdev;
+
+	NETIF_ASSERT(adapter, probe, adapter->netdev, phy);
+
+	netdev = adapter->netdev;
+
+	memset(phy, 0, sizeof(struct lan743x_phy));
+
+	ret = lan743x_phy_reset(adapter);
+	if (ret) {
+		NETIF_ERROR(adapter, probe, adapter->netdev,
+			    "phy reset failed, ret = %d", ret);
+		goto clean_up;
+	}
+
+	/* carrier off reporting is important to ethtool even BEFORE open */
+	netif_carrier_off(netdev);
+
+	ret = 0;
+
+clean_up:
+	if (ret)
+		lan743x_phy_cleanup(adapter);
+	return ret;
+}
+
+static void lan743x_phy_cleanup(struct lan743x_adapter *adapter)
+{
+	struct lan743x_phy *phy = &adapter->phy;
+
+	memset(phy, 0, sizeof(struct lan743x_phy));
+}
+
+static void lan743x_phy_link_status_change(struct net_device *netdev)
+{
+	struct lan743x_adapter *adapter = netdev_priv(netdev);
+	struct phy_device *phydev = netdev->phydev;
+
+	if (phydev) {
+		if (phydev->state == PHY_RUNNING) {
+			struct ethtool_link_ksettings ksettings;
+			int local_advertisement = 0;
+			int remote_advertisement = 0;
+			struct lan743x_phy *phy = NULL;
+
+			NETIF_ASSERT(adapter, link, adapter->netdev, adapter);
+			phy = &adapter->phy;
+
+			memset(&ksettings, 0, sizeof(ksettings));
+			phy_ethtool_get_link_ksettings(netdev, &ksettings);
+
+			local_advertisement = phy_read(phydev, MII_ADVERTISE);
+			if (local_advertisement < 0) {
+				NETIF_ERROR(adapter, link, adapter->netdev,
+					    "reading local_advertisement failed");
+				goto done;
+			}
+
+			remote_advertisement = phy_read(phydev, MII_LPA);
+			if (remote_advertisement < 0) {
+				NETIF_ERROR(adapter, link, adapter->netdev,
+					    "reading remote_advertisement failed");
+				goto done;
+			}
+
+			NETIF_INFO(adapter, link, adapter->netdev,
+				   "link UP: speed: %u duplex: %d anadv: 0x%04x anlpa: 0x%04x",
+				   ksettings.base.speed, ksettings.base.duplex,
+				   local_advertisement, remote_advertisement);
+
+			lan743x_phy_update_flowcontrol(adapter,
+						       ksettings.base.duplex,
+						       local_advertisement,
+						       remote_advertisement);
+		} else if (phydev->state == PHY_NOLINK) {
+			NETIF_INFO(adapter, link, adapter->netdev,
+				   "link DOWN");
+		}
+	} else {
+		NETIF_ERROR(adapter, link, adapter->netdev, "phydev == NULL");
+	}
+done:
+	return;
+}
+
+static int lan743x_phy_open(struct lan743x_adapter *adapter)
+{
+	struct lan743x_phy *phy = &adapter->phy;
+	int ret;
+	u32 mii_adv;
+	struct phy_device *phydev;
+	struct net_device *netdev;
+	struct lan743x_mac *mac = &adapter->mac;
+	int phy_id1 = 0;
+	int phy_id2 = 0;
+
+	netdev = adapter->netdev;
+
+	NETIF_ASSERT(adapter, ifup, adapter->netdev, mac->mdiobus);
+
+	phydev = phy_find_first(mac->mdiobus);
+	if (!phydev) {
+		NETIF_ERROR(adapter, ifup, adapter->netdev, "no PHY found");
+		ret = -EIO;
+		goto clean_up;
+	}
+
+	phydev->irq = PHY_POLL;
+
+	NETIF_INFO(adapter, ifup, adapter->netdev,
+		   "phy irq assigned to %d", phydev->irq);
+	ret = phy_connect_direct(netdev, phydev,
+				 lan743x_phy_link_status_change,
+				 PHY_INTERFACE_MODE_GMII);
+	if (ret) {
+		NETIF_ERROR(adapter, ifup, adapter->netdev,
+			    "can't attach PHY to %s", mac->mdiobus->id);
+		ret = -EIO;
+		goto clean_up;
+	}
+	phy->flags |= PHY_FLAG_ATTACHED;
+
+	if (!(phydev->drv)) {
+		NETIF_ERROR(adapter, ifup, adapter->netdev,
+			    "Missing PHY Driver");
+		ret = -EIO;
+		goto clean_up;
+	}
+
+	phy_id1 = phy_read(phydev, MII_PHYSID1);
+	phy_id2 = phy_read(phydev, MII_PHYSID2);
+	NETIF_INFO(adapter, ifup, adapter->netdev,
+		   "PHY_ID1 = 0x%04x", phy_id1);
+	NETIF_INFO(adapter, ifup, adapter->netdev,
+		   "PHY_ID2 = 0x%04x", phy_id2);
+
+	/* MAC doesn't support 1000T Half */
+	phydev->supported &= ~SUPPORTED_1000baseT_Half;
+
+	/* support both flow controls */
+	phy->fc_request_control = (FLOW_CTRL_RX | FLOW_CTRL_TX);
+	phydev->advertising &= ~(ADVERTISED_Pause | ADVERTISED_Asym_Pause);
+	mii_adv = (u32)mii_advertise_flowctrl(phy->fc_request_control);
+	phydev->advertising |= mii_adv_to_ethtool_adv_t(mii_adv);
+
+	phy->fc_autoneg = phydev->autoneg;
+
+	/* PHY interrupt enabled here */
+	phy_start(phydev);
+
+	phy_start_aneg(phydev);
+
+	phy->flags |= PHY_FLAG_OPENED;
+	ret = 0;
+
+clean_up:
+	if (ret)
+		lan743x_phy_close(adapter);
+	return ret;
+}
+
+static void lan743x_phy_close(struct lan743x_adapter *adapter)
+{
+	struct lan743x_phy *phy = &adapter->phy;
+	struct net_device *netdev = adapter->netdev;
+
+	if (phy->flags & PHY_FLAG_OPENED) {
+		netif_carrier_off(netdev);
+
+		phy_stop(netdev->phydev);
+		phy->flags &= ~PHY_FLAG_OPENED;
+	}
+	if (phy->flags & PHY_FLAG_ATTACHED) {
+		phy_disconnect(netdev->phydev);
+		netdev->phydev = NULL;
+		phy->flags &= ~PHY_FLAG_ATTACHED;
+	}
+}
+
+/* RFE */
+
+static void lan743x_rfe_update_mac_address(struct lan743x_adapter *adapter)
+{
+	u8 mac_addr[ETH_ALEN];
+	u32 mac_addr_hi = 0;
+	u32 mac_addr_lo = 0;
+
+	/* Add mac address to perfect Filter */
+	lan743x_mac_get_address(adapter, mac_addr);
+	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 int lan743x_rfe_init(struct lan743x_adapter *adapter)
+{
+	struct lan743x_rfe *rfe = &adapter->rfe;
+
+	NETIF_ASSERT(adapter, probe, adapter->netdev, rfe);
+	memset(rfe, 0, sizeof(*rfe));
+
+	/* Add mac address to perfect Filter */
+	lan743x_rfe_update_mac_address(adapter);
+
+	return 0;
+}
+
+static void lan743x_rfe_cleanup(struct lan743x_adapter *adapter)
+{
+	/* This empty function is kept as a place holder */
+}
+
+static int lan743x_rfe_open(struct lan743x_adapter *adapter)
+{
+	/* This empty function is kept as a place holder */
+	return 0;
+}
+
+static void lan743x_rfe_close(struct lan743x_adapter *adapter)
+{
+	/* This empty function is kept as a place holder */
+}
+
+/* returns hash bit number for given MAC address */
+static inline u32 lan743x_rfe_get_hash_bit(char addr[ETH_ALEN])
+{
+	return (ether_crc(ETH_ALEN, addr) >> 23) & 0x1ff;
+}
+
+static void lan743x_rfe_set_multicast(struct lan743x_adapter *adapter)
+{
+	u32 rfctl;
+	u32 data;
+	struct net_device *netdev = adapter->netdev;
+	u32 hash_table[DP_SEL_VHF_HASH_LEN];
+
+	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 = lan743x_rfe_get_hash_bit(ha->addr);
+
+				hash_table[bitnum / 32] |= (1 << (bitnum % 32));
+				rfctl |= RFE_CTL_MCAST_HASH_;
+			}
+			i++;
+		}
+	}
+
+	if (lan743x_dp_write_hash_filter(adapter, hash_table))
+		NETIF_ERROR(adapter, drv, adapter->netdev,
+			    "write to hash table failed");
+
+	lan743x_csr_write(adapter, RFE_CTL, rfctl);
+}
+
+/* FCT */
+
+static void lan743x_fct_isr(void *context)
+{
+	struct lan743x_adapter *adapter = (struct lan743x_adapter *)context;
+	u32 fct_int_sts = 0;
+	u32 fct_int_en = 0;
+
+	NETIF_ASSERT(adapter, drv, adapter->netdev, adapter);
+
+	lan743x_csr_write(adapter, INT_EN_CLR, INT_BIT_FCT_);
+
+	fct_int_sts = lan743x_csr_read(adapter, FCT_INT_STS);
+	fct_int_en = lan743x_csr_read(adapter, FCT_INT_EN_SET);
+
+	fct_int_sts = fct_int_sts & fct_int_en;
+	if (fct_int_sts & FCT_INT_MASK_ERRORS_) {
+		if (fct_int_sts & FCT_INT_BIT_TXE_)
+			NETIF_ERROR(adapter, drv, adapter->netdev,
+				    "Transmitter Error");
+		if (fct_int_sts & FCT_INT_BIT_TDFO_)
+			NETIF_ERROR(adapter, drv, adapter->netdev,
+				    "Tx Data FIFO Overrun");
+		if (fct_int_sts & FCT_INT_BIT_TDFU_)
+			NETIF_ERROR(adapter, drv, adapter->netdev,
+				    "TX Data FIFO Underrun");
+	}
+	if (fct_int_sts & (~FCT_INT_MASK_ERRORS_))
+		NETIF_ERROR(adapter, drv, adapter->netdev,
+			    "unhandled interrupt, fct_int_sts = 0x%08X",
+			    fct_int_sts);
+
+	/* clear fct int status bits */
+	lan743x_csr_write(adapter, FCT_INT_STS, fct_int_sts);
+
+	/* enable isr */
+	lan743x_csr_write(adapter, INT_EN_SET, INT_BIT_FCT_);
+}
+
+static int lan743x_fct_init(struct lan743x_adapter *adapter)
+{
+	/* this empty function is kept as a place holder */
+	return 0;
+}
+
+static void lan743x_fct_cleanup(struct lan743x_adapter *adapter)
+{
+	/* this empty function is kept as a place holder */
+}
+
+static int lan743x_fct_open(struct lan743x_adapter *adapter)
+{
+	lan743x_csr_write(adapter, INT_EN_SET, INT_BIT_FCT_);
+	lan743x_csr_write(adapter, FCT_INT_EN_SET, FCT_INT_MASK_ERRORS_);
+	return 0;
+}
+
+static void lan743x_fct_close(struct lan743x_adapter *adapter)
+{
+	lan743x_csr_write(adapter, FCT_INT_EN_CLR, FCT_INT_MASK_ERRORS_);
+	lan743x_csr_write(adapter, INT_EN_CLR, INT_BIT_FCT_);
+}
+
+static int lan743x_fct_rx_reset(struct lan743x_adapter *adapter, int rx_channel)
+{
+	int ret = -EIO;
+	int timeout = 100;
+	u32 data = 0;
+
+	NETIF_ASSERT(adapter, drv, adapter->netdev, (rx_channel >= 0) &&
+		     (rx_channel < LAN743X_NUMBER_OF_RX_CHANNELS));
+
+	data = lan743x_csr_read(adapter, FCT_RX_CTL);
+	if (data & FCT_RX_CTL_EN_(rx_channel)) {
+		NETIF_ERROR(adapter, drv, adapter->netdev,
+			    "Attempting to reset fifo while enabled, rx_channel = %d",
+			    rx_channel);
+		ret = -EIO;
+		goto done;
+	}
+
+	lan743x_csr_write(adapter, FCT_RX_CTL, FCT_RX_CTL_RESET_(rx_channel));
+	while (timeout &&
+	       ((data = lan743x_csr_read(adapter, FCT_RX_CTL)) &
+	       FCT_RX_CTL_RESET_(rx_channel))) {
+		usleep_range(1000, 20000);
+		timeout--;
+	}
+	if (data & FCT_RX_CTL_RESET_(rx_channel)) {
+		NETIF_ERROR(adapter, drv, adapter->netdev,
+			    "Timed out waiting for rx fifo to reset, rx_channel = %d",
+			    rx_channel);
+		ret = -EIO;
+		goto done;
+	}
+
+	lan743x_csr_write(adapter, FCT_FLOW(rx_channel),
+			  FCT_FLOW_CTL_REQ_EN_ |
+			  FCT_FLOW_CTL_ON_THRESHOLD_SET_(0x2A) |
+			  FCT_FLOW_CTL_OFF_THRESHOLD_SET_(0xA));
+
+	ret = 0;
+done:
+	return ret;
+}
+
+static int lan743x_fct_rx_enable(struct lan743x_adapter *adapter,
+				 int rx_channel)
+{
+	u32 data = 0;
+
+	NETIF_ASSERT(adapter, drv, adapter->netdev, (rx_channel >= 0) &&
+		     (rx_channel < LAN743X_NUMBER_OF_RX_CHANNELS));
+
+	data = lan743x_csr_read(adapter, FCT_RX_CTL);
+	if (data & FCT_RX_CTL_EN_(rx_channel)) {
+		NETIF_WARNING(adapter, drv, adapter->netdev,
+			      "Attempting to enable an already enabled channel, rx_channel = %d",
+			      rx_channel);
+	} else {
+		lan743x_csr_write(adapter, FCT_RX_CTL,
+				  FCT_RX_CTL_EN_(rx_channel));
+	}
+
+	return 0;
+}
+
+static int lan743x_fct_rx_disable(struct lan743x_adapter *adapter,
+				  int rx_channel)
+{
+	int ret = -EIO;
+	int timeout = 100;
+	u32 data = 0;
+
+	NETIF_ASSERT(adapter, drv, adapter->netdev,
+		     (rx_channel >= 0) &&
+		     (rx_channel < LAN743X_NUMBER_OF_RX_CHANNELS));
+
+	data = lan743x_csr_read(adapter, FCT_RX_CTL);
+	if (!(data & FCT_RX_CTL_EN_(rx_channel))) {
+		NETIF_WARNING(adapter, drv, adapter->netdev,
+			      "Attempting to disable an already disabled channel, rx_channel = %d",
+			      rx_channel);
+		ret = 0;
+		goto done;
+	} else {
+		lan743x_csr_write(adapter, FCT_RX_CTL,
+				  FCT_RX_CTL_DIS_(rx_channel));
+	}
+
+	while (timeout &&
+	       ((data = lan743x_csr_read(adapter, FCT_RX_CTL)) &
+	       FCT_RX_CTL_EN_(rx_channel))) {
+		usleep_range(1000, 20000);
+		timeout--;
+	}
+	if (data & FCT_RX_CTL_EN_(rx_channel)) {
+		NETIF_ERROR(adapter, drv, adapter->netdev,
+			    "Timed out waiting for rx fifo to disable, rx_channel = %d",
+			    rx_channel);
+		ret = -EIO;
+		goto done;
+	}
+	ret = 0;
+done:
+	return ret;
+}
+
+static int lan743x_fct_tx_reset(struct lan743x_adapter *adapter, int tx_channel)
+{
+	int ret = -EIO;
+	int timeout = 100;
+	u32 data = 0;
+
+	NETIF_ASSERT(adapter, drv, adapter->netdev, (tx_channel >= 0) &&
+		     (tx_channel < LAN743X_NUMBER_OF_TX_CHANNELS));
+
+	data = lan743x_csr_read(adapter, FCT_TX_CTL);
+	if (data & FCT_TX_CTL_EN_(tx_channel)) {
+		NETIF_ERROR(adapter, drv, adapter->netdev,
+			    "Attempting to reset fifo while enabled, tx_channel = %d",
+			    tx_channel);
+		ret = -EIO;
+		goto done;
+	}
+
+	lan743x_csr_write(adapter, FCT_TX_CTL, FCT_TX_CTL_RESET_(tx_channel));
+	while (timeout &&
+	       ((data = lan743x_csr_read(adapter, FCT_TX_CTL)) &
+	       FCT_TX_CTL_RESET_(tx_channel)))	{
+		usleep_range(1000, 20000);
+		timeout--;
+	}
+	if (data & FCT_TX_CTL_RESET_(tx_channel)) {
+		NETIF_ERROR(adapter, drv, adapter->netdev,
+			    "Timed out waiting for tx fifo to reset, tx_channel = %d",
+			    tx_channel);
+		ret = -EIO;
+		goto done;
+	}
+	ret = 0;
+done:
+	return ret;
+}
+
+static int lan743x_fct_tx_enable(struct lan743x_adapter *adapter,
+				 int tx_channel)
+{
+	u32 data = 0;
+
+	NETIF_ASSERT(adapter, drv, adapter->netdev, (tx_channel >= 0) &&
+		     (tx_channel < LAN743X_NUMBER_OF_TX_CHANNELS));
+
+	data = lan743x_csr_read(adapter, FCT_TX_CTL);
+	if (data & FCT_TX_CTL_EN_(tx_channel)) {
+		NETIF_WARNING(adapter, drv, adapter->netdev,
+			      "Attempting to enable an already enabled channel, tx_channel = %d",
+			      tx_channel);
+	} else {
+		lan743x_csr_write(adapter, FCT_TX_CTL,
+				  FCT_TX_CTL_EN_(tx_channel));
+	}
+
+	return 0;
+}
+
+static int lan743x_fct_tx_disable(struct lan743x_adapter *adapter,
+				  int tx_channel)
+{
+	int ret = -EIO;
+	int timeout = 100;
+	u32 data = 0;
+
+	NETIF_ASSERT(adapter, drv, adapter->netdev, (tx_channel >= 0) &&
+		     (tx_channel < LAN743X_NUMBER_OF_TX_CHANNELS));
+
+	data = lan743x_csr_read(adapter, FCT_TX_CTL);
+	if (!(data & FCT_TX_CTL_EN_(tx_channel))) {
+		NETIF_WARNING(adapter, drv, adapter->netdev,
+			      "Attempting to disable an already disabled channel, tx_channel = %d",
+			      tx_channel);
+		ret = 0;
+		goto done;
+	} else {
+		lan743x_csr_write(adapter, FCT_TX_CTL,
+				  FCT_TX_CTL_DIS_(tx_channel));
+	}
+
+	while (timeout &&
+	       ((data = lan743x_csr_read(adapter, FCT_TX_CTL)) &
+	       FCT_TX_CTL_EN_(tx_channel))) {
+		usleep_range(1000, 20000);
+		timeout--;
+	}
+	if (data & FCT_TX_CTL_EN_(tx_channel)) {
+		NETIF_ERROR(adapter, drv, adapter->netdev,
+			    "Timed out waiting for tx fifo to disable, tx_channel = %d",
+			    tx_channel);
+		ret = -EIO;
+		goto done;
+	}
+	ret = 0;
+done:
+	return ret;
+}
+
+/* DMAC */
+
+#ifdef CONFIG_ARCH_DMA_ADDR_T_64BIT
+#define DMA_ADDR_HIGH32(dma_addr)   ((u32)(((dma_addr) >> 32) & 0xFFFFFFFF))
+#else
+#define DMA_ADDR_HIGH32(dma_addr)   ((u32)(0))
+#endif
+#define DMA_ADDR_LOW32(dma_addr) ((u32)((dma_addr) & 0xFFFFFFFF))
+
+#define DMAC_FLAG_TX_USED(channel)  BIT(0 + (channel))
+#define DMAC_FLAG_TX0_USED      BIT(0)
+#define DMAC_FLAG_TX1_USED      BIT(1)
+#define DMAC_FLAG_TX2_USED      BIT(2)
+#define DMAC_FLAG_TX3_USED      BIT(3)
+#define DMAC_FLAG_RX_USED(channel)  BIT(4 + (channel))
+#define DMAC_FLAG_RX0_USED      BIT(4)
+#define DMAC_FLAG_RX1_USED      BIT(5)
+#define DMAC_FLAG_RX2_USED      BIT(6)
+#define DMAC_FLAG_RX3_USED      BIT(7)
+
+#define DMA_DESCRIPTOR_SPACING_16       (16)
+#define DMA_DESCRIPTOR_SPACING_32       (32)
+#define DMA_DESCRIPTOR_SPACING_64       (64)
+#define DMA_DESCRIPTOR_SPACING_128      (128)
+
+#define DEFAULT_DMA_DESCRIPTOR_SPACING  (L1_CACHE_BYTES)
+
+static void lan743x_dmac_isr(void *context)
+{
+	struct lan743x_adapter *adapter = (struct lan743x_adapter *)context;
+	struct lan743x_dmac *dmac = NULL;
+	u32 dmac_int_sts = 0;
+	int channel = 0;
+	int found_set_bit = 0;
+
+	NETIF_ASSERT(adapter, drv, adapter->netdev, adapter);
+	dmac = &adapter->dmac;
+
+	lan743x_csr_write(adapter, INT_EN_CLR, INT_BIT_DMA_GEN_);
+
+	dmac_int_sts = lan743x_csr_read(adapter, DMAC_INT_STS);
+
+	if (!(dmac_int_sts & DMAC_INT_BIT_ERR_)) {
+		NETIF_ERROR(adapter, drv, adapter->netdev,
+			    "unexpected dmac_isr call");
+		goto done;
+	}
+
+	for (channel = 0; channel < LAN743X_NUMBER_OF_RX_CHANNELS;
+	     channel++) {
+		u32 rx_err_sts = lan743x_csr_read(adapter,
+						  DMAC_RX_ERR_STS(channel));
+
+		if (rx_err_sts &
+		    (DMAC_RX_ERR_STS_RESERVED_ |
+		    DMAC_RX_ERR_STS_RX_DESC_READ_ERR_ |
+		    DMAC_RX_ERR_STS_RX_DESC_TAIL_ERR_)) {
+			found_set_bit = 1;
+			NETIF_ERROR(adapter, drv, adapter->netdev,
+				    "RX_ERR_STS(%d) = 0x%08X",
+				    channel, rx_err_sts);
+			if (rx_err_sts & DMAC_RX_ERR_STS_RESERVED_)
+				NETIF_ERROR(adapter, drv, adapter->netdev,
+					    "  reserved bits set");
+			if (rx_err_sts &
+			    DMAC_RX_ERR_STS_RX_DESC_READ_ERR_)
+				NETIF_ERROR(adapter, drv, adapter->netdev,
+					    "  RX Descriptor Read Retry Error");
+			if (rx_err_sts &
+			    DMAC_RX_ERR_STS_RX_DESC_TAIL_ERR_)
+				NETIF_ERROR(adapter, drv, adapter->netdev,
+					    "  RX Descriptor Tail Error");
+
+			/* clear errors */
+			lan743x_csr_write(adapter, DMAC_RX_ERR_STS(channel),
+					  rx_err_sts);
+		}
+	}
+	for (channel = 0;
+	     channel < LAN743X_NUMBER_OF_TX_CHANNELS; channel++) {
+		u32 tx_err_sts = lan743x_csr_read(adapter,
+						  DMAC_TX_ERR_STS(channel));
+
+		if (tx_err_sts &
+		    (DMAC_TX_ERR_STS_RESERVED_ |
+		    DMAC_TX_ERR_STS_TX_DATA_READ_ERR_ |
+		    DMAC_TX_ERR_STS_TX_DESC_READ_ERR_ |
+		    DMAC_TX_ERR_STS_TX_DESC_TAIL_ERR_ |
+		    DMAC_TX_ERR_STS_TX_FCT_TXE_ |
+		    DMAC_TX_ERR_STS_TX_DESC_DATATYPE_ERR_ |
+		    DMAC_TX_ERR_STS_TX_DESC_EXTNTYPE_ERR_ |
+		    DMAC_TX_ERR_STS_TX_DESC_EXTRAFS_ERR_ |
+		    DMAC_TX_ERR_STS_TX_DESC_NOFS_ERR_)) {
+			found_set_bit = 1;
+			NETIF_ERROR(adapter, drv, adapter->netdev,
+				    "TX_ERR_STS(%d) = 0x%08X",
+				    channel, tx_err_sts);
+			if (tx_err_sts & DMAC_TX_ERR_STS_RESERVED_)
+				NETIF_ERROR(adapter, drv, adapter->netdev,
+					    "  reserved bits set");
+			if (tx_err_sts &
+			    DMAC_TX_ERR_STS_TX_DATA_READ_ERR_)
+				NETIF_ERROR(adapter, drv, adapter->netdev,
+					    "  TX Data Buffer Read Retry Error");
+			if (tx_err_sts &
+			    DMAC_TX_ERR_STS_TX_DESC_READ_ERR_)
+				NETIF_ERROR(adapter, drv, adapter->netdev,
+					    "  TX Descriptor Read Retry Error");
+			if (tx_err_sts &
+			    DMAC_TX_ERR_STS_TX_DESC_TAIL_ERR_)
+				NETIF_ERROR(adapter, drv, adapter->netdev,
+					    "  TX Descriptor Tail Error");
+			if (tx_err_sts & DMAC_TX_ERR_STS_TX_FCT_TXE_)
+				NETIF_ERROR(adapter, drv, adapter->netdev,
+					    "  TX FCT TX Error");
+			if (tx_err_sts &
+			    DMAC_TX_ERR_STS_TX_DESC_DATATYPE_ERR_)
+				NETIF_ERROR(adapter, drv, adapter->netdev,
+					    "  TX Data Descriptor Missing Error");
+			if (tx_err_sts &
+			    DMAC_TX_ERR_STS_TX_DESC_EXTNTYPE_ERR_)
+				NETIF_ERROR(adapter, drv, adapter->netdev,
+					    "  TX Extension Descriptor Missing Error");
+			if (tx_err_sts &
+			    DMAC_TX_ERR_STS_TX_DESC_EXTRAFS_ERR_)
+				NETIF_ERROR(adapter, drv, adapter->netdev,
+					    "  TX Descriptor Extraneous FS Error");
+			if (tx_err_sts &
+			    DMAC_TX_ERR_STS_TX_DESC_NOFS_ERR_)
+				NETIF_ERROR(adapter, drv, adapter->netdev,
+					    "  TX Descriptor Missing FS Error");
+
+			/* clear errors */
+			lan743x_csr_write(adapter, DMAC_TX_ERR_STS(channel),
+					  tx_err_sts);
+		}
+	}
+	if (!found_set_bit)
+		NETIF_ERROR(adapter, drv, adapter->netdev,
+			    "DMAC_INT_BIT_ERR_ set with out cause, DMAC_INT_STS = 0x%08X",
+			    dmac_int_sts);
+done:
+	/* clear dma int status */
+	lan743x_csr_write(adapter, DMAC_INT_STS, dmac_int_sts);
+
+	/* enable isr */
+	lan743x_csr_write(adapter, INT_EN_SET, INT_BIT_DMA_GEN_);
+}
+
+static int lan743x_dmac_reset(struct lan743x_adapter *adapter)
+{
+	int timeout = 100;
+	u32 data = 0;
+	int ret = 0;
+
+	lan743x_csr_write(adapter, DMAC_CMD, DMAC_CMD_SWR_);
+	while (timeout &&
+	       ((data = lan743x_csr_read(adapter, DMAC_CMD)) &
+	       DMAC_CMD_SWR_)) {
+		usleep_range(1000, 20000);
+		timeout--;
+	}
+	if (data & DMAC_CMD_SWR_) {
+		NETIF_ERROR(adapter, drv, adapter->netdev,
+			    "Timed out waiting for DMAC reset to complete");
+		ret = -ENODEV;
+	}
+	return ret;
+}
+
+static int lan743x_dmac_init(struct lan743x_adapter *adapter)
+{
+	struct lan743x_dmac *dmac = &adapter->dmac;
+	int ret = -ENODEV;
+	u32 dma_cfg = 0;
+
+	NETIF_ASSERT(adapter, probe, adapter->netdev, dmac);
+
+	memset(dmac, 0, sizeof(*dmac));
+
+	dmac->flags = 0;
+
+	dmac->descriptor_spacing = DEFAULT_DMA_DESCRIPTOR_SPACING;
+
+	ret = lan743x_dmac_reset(adapter);
+	if (ret) {
+		NETIF_ERROR(adapter, probe, adapter->netdev,
+			    "DMAC reset failed");
+		goto cleanup;
+	}
+
+	switch (dmac->descriptor_spacing) {
+	case DMA_DESCRIPTOR_SPACING_16:
+		dma_cfg = DMAC_CFG_MAX_DSPACE_16_;
+		break;
+	case DMA_DESCRIPTOR_SPACING_32:
+		dma_cfg = DMAC_CFG_MAX_DSPACE_32_;
+		break;
+	case DMA_DESCRIPTOR_SPACING_64:
+		dma_cfg = DMAC_CFG_MAX_DSPACE_64_;
+		break;
+	case DMA_DESCRIPTOR_SPACING_128:
+		dma_cfg = DMAC_CFG_MAX_DSPACE_128_;
+		break;
+	default:
+		ret = -EPERM;
+		goto cleanup;
+	}
+	dma_cfg |= DMAC_CFG_CH_ARB_SEL_RX_HIGH_;
+	dma_cfg |= DMAC_CFG_MAX_READ_REQ_SET_(6);
+	lan743x_csr_write(adapter, DMAC_CFG, dma_cfg);
+
+	ret = 0;
+cleanup:
+	if (ret)
+		lan743x_dmac_cleanup(adapter);
+	return ret;
+}
+
+static void lan743x_dmac_cleanup(struct lan743x_adapter *adapter)
+{
+	struct lan743x_dmac *dmac = &adapter->dmac;
+	int channel;
+
+	/* error checking */
+	for (channel = 0; channel < LAN743X_NUMBER_OF_TX_CHANNELS;
+	     channel++) {
+		if (dmac->flags & (DMAC_FLAG_TX_USED(channel))) {
+			NETIF_ERROR(adapter, drv, adapter->netdev,
+				    "TX Channel %d, is still in use",
+				    channel);
+		}
+	}
+	for (channel = 0; channel < LAN743X_NUMBER_OF_RX_CHANNELS;
+	     channel++) {
+		if (dmac->flags & (DMAC_FLAG_RX_USED(channel))) {
+			NETIF_ERROR(adapter, drv, adapter->netdev,
+				    "RX Channel %d, is still in use",
+				    channel);
+		}
+	}
+
+	memset(dmac, 0, sizeof(*dmac));
+}
+
+static int lan743x_dmac_open(struct lan743x_adapter *adapter)
+{
+	lan743x_csr_write(adapter, INT_EN_SET, INT_BIT_DMA_GEN_);
+	lan743x_csr_write(adapter, DMAC_INT_EN_SET, DMAC_INT_BIT_ERR_);
+
+	return 0;
+}
+
+static void lan743x_dmac_close(struct lan743x_adapter *adapter)
+{
+	lan743x_csr_write(adapter, DMAC_INT_EN_CLR, DMAC_INT_BIT_ERR_);
+	lan743x_csr_write(adapter, INT_EN_CLR, INT_BIT_DMA_GEN_);
+}
+
+static int lan743x_dmac_get_descriptor_spacing(struct lan743x_adapter *adapter)
+{
+	struct lan743x_dmac *dmac = &adapter->dmac;
+
+	return dmac->descriptor_spacing;
+}
+
+static int lan743x_dmac_reserve_tx_channel(struct lan743x_adapter *adapter,
+					   int tx_channel)
+{
+	struct lan743x_dmac *dmac = &adapter->dmac;
+	int ret = -EBUSY;
+
+	if ((tx_channel >= 0) && (tx_channel < LAN743X_NUMBER_OF_TX_CHANNELS)) {
+		if (!(dmac->flags & DMAC_FLAG_TX_USED(tx_channel))) {
+			/* tx channel not yet used, go ahead and reserve it */
+			dmac->flags |= DMAC_FLAG_TX_USED(tx_channel);
+			ret = 0;
+		} else {
+			NETIF_ERROR(adapter, drv, adapter->netdev,
+				    "Attempted to reserve a channel that was already reserved, tx_channel = %d",
+				    tx_channel);
+		}
+	} else {
+		NETIF_ERROR(adapter, drv, adapter->netdev,
+			    "out of range, channel_number = %d",
+			    tx_channel);
+	}
+	return ret;
+}
+
+static void lan743x_dmac_release_tx_channel(struct lan743x_adapter *adapter,
+					    int tx_channel)
+{
+	struct lan743x_dmac *dmac = &adapter->dmac;
+
+	if ((tx_channel >= 0) && (tx_channel < LAN743X_NUMBER_OF_TX_CHANNELS)) {
+		if (dmac->flags & DMAC_FLAG_TX_USED(tx_channel)) {
+			/* tx channel is in use, go ahead and release it */
+			dmac->flags &= ~DMAC_FLAG_TX_USED(tx_channel);
+		} else {
+			NETIF_ERROR(adapter, drv, adapter->netdev,
+				    "Attempted to release a tx channel that was not in use, tx_channel = %d",
+				    tx_channel);
+		}
+	} else {
+		NETIF_ERROR(adapter, drv, adapter->netdev,
+			    "out of range, tx_channel = %d",
+			    tx_channel);
+	}
+}
+
+static int lan743x_dmac_reserve_rx_channel(struct lan743x_adapter *adapter,
+					   int rx_channel)
+{
+	struct lan743x_dmac *dmac = &adapter->dmac;
+	int ret = -EBUSY;
+
+	if ((rx_channel >= 0) && (rx_channel < LAN743X_NUMBER_OF_RX_CHANNELS)) {
+		if (!(dmac->flags & DMAC_FLAG_RX_USED(rx_channel))) {
+			/* rx channel not yet used, go ahead and reserve it */
+			dmac->flags |= DMAC_FLAG_RX_USED(rx_channel);
+			ret = 0;
+		} else {
+			NETIF_ERROR(adapter, drv, adapter->netdev,
+				    "Attempted to reserve an rx channel that was already reserved, rx_channel = %d",
+				    rx_channel);
+		}
+	} else {
+		NETIF_ERROR(adapter, drv, adapter->netdev,
+			    "out of range, rx_channel = %d", rx_channel);
+	}
+	return ret;
+}
+
+static void lan743x_dmac_release_rx_channel(struct lan743x_adapter *adapter,
+					    int rx_channel)
+{
+	struct lan743x_dmac *dmac = &adapter->dmac;
+
+	if ((rx_channel >= 0) && (rx_channel < LAN743X_NUMBER_OF_RX_CHANNELS)) {
+		if (dmac->flags & DMAC_FLAG_RX_USED(rx_channel)) {
+			/* rx channel is in use, go ahead and release it */
+			dmac->flags &= ~DMAC_FLAG_RX_USED(rx_channel);
+		} else {
+			NETIF_ERROR(adapter, drv, adapter->netdev,
+				    "Attempted to release an rx channel that was not in use, rx_channel = %d",
+				    rx_channel);
+		}
+	} else {
+		NETIF_ERROR(adapter, drv, adapter->netdev,
+			    "out of range, rx_channel = %d", rx_channel);
+	}
+}
+
+#define DMAC_CHANNEL_STATE_SET(start_bit, stop_bit) \
+	(((start_bit) ? 2 : 0) | ((stop_bit) ? 1 : 0))
+#define DMAC_CHANNEL_STATE_INITIAL      DMAC_CHANNEL_STATE_SET(0, 0)
+#define DMAC_CHANNEL_STATE_STARTED      DMAC_CHANNEL_STATE_SET(1, 0)
+#define DMAC_CHANNEL_STATE_STOP_PENDING DMAC_CHANNEL_STATE_SET(1, 1)
+#define DMAC_CHANNEL_STATE_STOPPED      DMAC_CHANNEL_STATE_SET(0, 1)
+
+static int lan743x_dmac_tx_reset(struct lan743x_adapter *adapter,
+				 int tx_channel)
+{
+	struct lan743x_dmac *dmac = &adapter->dmac;
+	int ret = 0;
+	int timeout = 100;
+	u32 data = 0;
+	u32 reset_bit = 0;
+
+	NETIF_ASSERT(adapter, drv, adapter->netdev, (tx_channel >= 0) &&
+		     (tx_channel < LAN743X_NUMBER_OF_TX_CHANNELS));
+	NETIF_ASSERT(adapter, drv, adapter->netdev,
+		     dmac->flags & DMAC_FLAG_TX_USED(tx_channel));
+
+	reset_bit = DMAC_CMD_TX_SWR_(tx_channel);
+
+	lan743x_csr_write(adapter, DMAC_CMD, reset_bit);
+	while (timeout &&
+	       ((data = lan743x_csr_read(adapter, DMAC_CMD)) & reset_bit)) {
+		usleep_range(1000, 20000);
+		timeout--;
+	}
+	if (data & reset_bit) {
+		NETIF_ERROR(adapter, drv, adapter->netdev,
+			    "Timed out waiting for TX channel %d reset to complete",
+			    tx_channel);
+		ret = -ENODEV;
+	}
+	return ret;
+}
+
+static int lan743x_dmac_tx_get_state(struct lan743x_adapter *adapter,
+				     int tx_channel)
+{
+	struct lan743x_dmac *dmac = &adapter->dmac;
+	u32 dmac_cmd = 0;
+
+	NETIF_ASSERT(adapter, drv, adapter->netdev, (tx_channel >= 0) &&
+		     (tx_channel < LAN743X_NUMBER_OF_TX_CHANNELS));
+	NETIF_ASSERT(adapter, drv, adapter->netdev,
+		     dmac->flags & DMAC_FLAG_TX_USED(tx_channel));
+
+	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 result = 0;
+	int timeout = 100;
+
+	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) {
+		NETIF_ERROR(adapter, drv, adapter->netdev,
+			    "Timed out waiting for tx channel %d to stop",
+			    tx_channel);
+		result = -ENODEV;
+	}
+	return result;
+}
+
+static int lan743x_dmac_tx_start(struct lan743x_adapter *adapter,
+				 int tx_channel)
+{
+	struct lan743x_dmac *dmac = &adapter->dmac;
+	int ret = 0;
+	int state = 0;
+
+	NETIF_ASSERT(adapter, drv, adapter->netdev, (tx_channel >= 0) &&
+		     (tx_channel < LAN743X_NUMBER_OF_TX_CHANNELS));
+	NETIF_ASSERT(adapter, drv, adapter->netdev,
+		     dmac->flags & DMAC_FLAG_TX_USED(tx_channel));
+
+	state = lan743x_dmac_tx_wait_till_stopped(adapter, tx_channel);
+	if (state < 0) {
+		NETIF_ERROR(adapter, drv, adapter->netdev,
+			    "failed wait till not stop pending, tx_channel = %d",
+			    tx_channel);
+		ret = -ENODEV;
+		goto done;
+	}
+	if (state != DMAC_CHANNEL_STATE_STARTED) {
+		lan743x_csr_write(adapter, DMAC_CMD,
+				  DMAC_CMD_START_T_(tx_channel));
+		state = lan743x_dmac_tx_get_state(adapter, tx_channel);
+		if (state != DMAC_CHANNEL_STATE_STARTED) {
+			NETIF_ERROR(adapter, drv, adapter->netdev,
+				    "Failed to start tx channel %d",
+				    tx_channel);
+			ret = -ENODEV;
+			goto done;
+		}
+	} else {
+		NETIF_WARNING(adapter, drv, adapter->netdev,
+			      "Attempting to start an already started tx_channel = %d",
+			      tx_channel);
+	}
+done:
+	return ret;
+}
+
+static int lan743x_dmac_tx_stop(struct lan743x_adapter *adapter,
+				int tx_channel)
+{
+	struct lan743x_dmac *dmac = &adapter->dmac;
+	int ret = 0;
+	int state = 0;
+
+	NETIF_ASSERT(adapter, drv, adapter->netdev, (tx_channel >= 0) &&
+		     (tx_channel < LAN743X_NUMBER_OF_TX_CHANNELS));
+	NETIF_ASSERT(adapter, drv, adapter->netdev,
+		     dmac->flags & DMAC_FLAG_TX_USED(tx_channel));
+
+	state = lan743x_dmac_tx_get_state(adapter, tx_channel);
+	if (state == DMAC_CHANNEL_STATE_STARTED) {
+		lan743x_csr_write(adapter,
+				  DMAC_CMD, DMAC_CMD_STOP_T_(tx_channel));
+		state = lan743x_dmac_tx_wait_till_stopped(
+			adapter, tx_channel);
+		if (state < 0) {
+			NETIF_ERROR(adapter, drv, adapter->netdev,
+				    "failed wait till not stop pending, tx_channel = %d",
+				    tx_channel);
+			ret = -ENODEV;
+		}
+	} else if (state == DMAC_CHANNEL_STATE_STOP_PENDING) {
+		NETIF_ERROR(adapter, drv, adapter->netdev,
+			    "A stop is already pending for tx_channel = %d",
+			    tx_channel);
+		state = lan743x_dmac_tx_wait_till_stopped(
+			adapter, tx_channel);
+		if (state < 0) {
+			NETIF_ERROR(adapter, drv, adapter->netdev,
+				    "failed wait till not stop pending, tx_channel = %d",
+				    tx_channel);
+			ret = -ENODEV;
+		}
+	} else {
+		NETIF_WARNING(adapter, drv, adapter->netdev,
+			      "Attempting to stop a not started tx channel = %d",
+			      tx_channel);
+	}
+	return ret;
+}
+
+static int lan743x_dmac_rx_get_state(struct lan743x_adapter *adapter,
+				     int rx_channel)
+{
+	struct lan743x_dmac *dmac = &adapter->dmac;
+	u32 dmac_cmd = 0;
+
+	NETIF_ASSERT(adapter, drv, adapter->netdev, (rx_channel >= 0) &&
+		     (rx_channel < LAN743X_NUMBER_OF_RX_CHANNELS));
+	NETIF_ASSERT(adapter, drv, adapter->netdev,
+		     dmac->flags & DMAC_FLAG_RX_USED(rx_channel));
+
+	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 result = 0;
+	int timeout = 100;
+
+	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) {
+		NETIF_ERROR(adapter, drv, adapter->netdev,
+			    "Timed out waiting for rx channel %d to stop",
+			    rx_channel);
+		result = -ENODEV;
+	}
+	return result;
+}
+
+static int lan743x_dmac_rx_reset(struct lan743x_adapter *adapter,
+				 int rx_channel)
+{
+	struct lan743x_dmac *dmac = &adapter->dmac;
+	int ret = 0;
+	int timeout = 100;
+	u32 data = 0;
+	u32 reset_bit = 0;
+
+	NETIF_ASSERT(adapter, drv, adapter->netdev, (rx_channel >= 0) &&
+		     (rx_channel < LAN743X_NUMBER_OF_RX_CHANNELS));
+	NETIF_ASSERT(adapter, drv, adapter->netdev,
+		     dmac->flags & DMAC_FLAG_RX_USED(rx_channel));
+
+	reset_bit = DMAC_CMD_RX_SWR_(rx_channel);
+
+	lan743x_csr_write(adapter, DMAC_CMD, reset_bit);
+	while (timeout &&
+	       ((data = lan743x_csr_read(adapter, DMAC_CMD)) & reset_bit)) {
+		usleep_range(1000, 20000);
+		timeout--;
+	}
+	if (data & reset_bit) {
+		NETIF_ERROR(adapter, drv, adapter->netdev,
+			    "Timed out waiting for RX channel %d reset to complete",
+			    rx_channel);
+		ret = -ENODEV;
+	}
+	return ret;
+}
+
+static int lan743x_dmac_rx_start(struct lan743x_adapter *adapter,
+				 int rx_channel)
+{
+	struct lan743x_dmac *dmac = &adapter->dmac;
+	int ret = 0;
+	int state = 0;
+
+	NETIF_ASSERT(adapter, drv, adapter->netdev, (rx_channel >= 0) &&
+		     (rx_channel < LAN743X_NUMBER_OF_RX_CHANNELS));
+	NETIF_ASSERT(adapter, drv, adapter->netdev,
+		     dmac->flags & DMAC_FLAG_RX_USED(rx_channel));
+
+	state = lan743x_dmac_rx_wait_till_stopped(adapter, rx_channel);
+	if (state < 0) {
+		NETIF_ERROR(adapter, drv, adapter->netdev,
+			    "failed wait till not stop pending, rx_channel = %d",
+			    rx_channel);
+		ret = -ENODEV;
+		goto done;
+	}
+	if (state != DMAC_CHANNEL_STATE_STARTED) {
+		lan743x_csr_write(adapter, DMAC_CMD,
+				  DMAC_CMD_START_R_(rx_channel));
+		state = lan743x_dmac_rx_get_state(adapter, rx_channel);
+		if (state != DMAC_CHANNEL_STATE_STARTED) {
+			NETIF_ERROR(adapter, drv, adapter->netdev,
+				    "Failed to start rx channel %d",
+				    rx_channel);
+			ret = -ENODEV;
+			goto done;
+		}
+	} else {
+		NETIF_WARNING(adapter, drv, adapter->netdev,
+			      "Attempting to start an already started rx_channel = %d",
+			      rx_channel);
+	}
+done:
+	return ret;
+}
+
+static int lan743x_dmac_rx_stop(struct lan743x_adapter *adapter,
+				int rx_channel)
+{
+	struct lan743x_dmac *dmac = &adapter->dmac;
+	int ret = 0;
+	int state = 0;
+
+	NETIF_ASSERT(adapter, drv, adapter->netdev, (rx_channel >= 0) &&
+		     (rx_channel < LAN743X_NUMBER_OF_RX_CHANNELS));
+	NETIF_ASSERT(adapter, drv, adapter->netdev,
+		     dmac->flags & DMAC_FLAG_RX_USED(rx_channel));
+
+	state = lan743x_dmac_rx_get_state(adapter, rx_channel);
+	if (state == DMAC_CHANNEL_STATE_STARTED) {
+		lan743x_csr_write(adapter, DMAC_CMD,
+				  DMAC_CMD_STOP_R_(rx_channel));
+		state = lan743x_dmac_rx_wait_till_stopped(adapter, rx_channel);
+		if (state < 0) {
+			NETIF_ERROR(adapter, drv, adapter->netdev,
+				    "failed wait till not stop pending, rx_channel = %d",
+				    rx_channel);
+			ret = -ENODEV;
+		}
+	} else if (state == DMAC_CHANNEL_STATE_STOP_PENDING) {
+		NETIF_ERROR(adapter, drv, adapter->netdev,
+			    "A stop is already pending for rx_channel = %d",
+			    rx_channel);
+		state = lan743x_dmac_rx_wait_till_stopped(adapter, rx_channel);
+		if (state < 0) {
+			NETIF_ERROR(adapter, drv, adapter->netdev,
+				    "failed wait till not stop pending, rx_channel = %d",
+				    rx_channel);
+			ret = -ENODEV;
+		}
+	} else {
+		NETIF_WARNING(adapter, drv, adapter->netdev,
+			      "Attempting to stop a not started rx channel = %d",
+			      rx_channel);
+	}
+	return ret;
+}
+
+/* TX */
+
+/* TX Descriptor bits */
+#define TX_DESC_DATA0_DTYPE_MASK_     (0xC0000000)
+#define TX_DESC_DATA0_DTYPE_DATA_     (0x00000000)
+#define TX_DESC_DATA0_DTYPE_EXT_      (0x40000000)
+#define TX_DESC_DATA0_FS_             (0x20000000)
+#define TX_DESC_DATA0_LS_             (0x10000000)
+#define TX_DESC_DATA0_EXT_            (0x08000000)
+#define TX_DESC_DATA0_IOC_            (0x04000000)
+#define TX_DESC_DATA0_DTI_            (0x02000000)
+#define TX_DESC_DATA0_TSI_            (0x01000000)
+#define TX_DESC_DATA0_IGE_            (0x00800000)
+#define TX_DESC_DATA0_ICE_            (0x00400000)
+#define TX_DESC_DATA0_IPE_            (0x00200000)
+#define TX_DESC_DATA0_TPE_            (0x00100000)
+#define TX_DESC_DATA0_IVTG_           (0x00080000)
+#define TX_DESC_DATA0_RVTG_           (0x00040000)
+#define TX_DESC_DATA0_FCS_            (0x00020000)
+#define TX_DESC_DATA0_TSE_            (0x00010000)
+#define TX_DESC_DATA0_BUF_LENGTH_MASK_        (0x0000FFFF)
+
+#define TX_DESC_DATA0_EXT_LSO_            (0x00200000)
+#define TX_DESC_DATA0_EXT_PAY_LENGTH_MASK_    (0x000FFFFF)
+
+#define TX_DESC_DATA1_TADDRL_MASK_        (0xFFFFFFFF)
+#define TX_DESC_DATA2_TADDRH_MASK_        (0xFFFFFFFF)
+
+#define TX_DESC_DATA3_FRAME_LENGTH_MSS_MASK_  (0x3FFF0000)
+#define TX_DESC_DATA3_VTAG_MASK_          (0x0000FFFF)
+
+struct lan743x_tx_descriptor {
+	u32     data0;
+	u32     data1;
+	u32     data2;
+	u32     data3;
+} __aligned(DEFAULT_DMA_DESCRIPTOR_SPACING);
+
+#define TX_BUFFER_INFO_FLAG_ACTIVE                  BIT(0)
+#define TX_BUFFER_INFO_FLAG_TIMESTAMP_REQUESTED     BIT(1)
+#define TX_BUFFER_INFO_FLAG_SKB_FRAGMENT            BIT(2)
+struct lan743x_tx_buffer_info {
+	int flags;
+	struct sk_buff *skb;
+	dma_addr_t      dma_ptr;
+	unsigned int    buffer_length;
+};
+
+#define LAN743X_TX_RING_SIZE    (50)
+
+static void lan743x_tx_isr(void *context, u32 int_sts)
+{
+	int enable_flag = 1;
+	struct lan743x_tx *tx = (struct lan743x_tx *)context;
+	struct lan743x_adapter *adapter = tx->adapter;
+
+	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 dmac_int_sts = lan743x_csr_read(adapter, DMAC_INT_STS);
+		u32 dmac_int_en = lan743x_csr_read(adapter, DMAC_INT_EN_SET);
+		u32 ioc_bit = DMAC_INT_BIT_TX_IOC_(tx->channel_number);
+		u32 stop_bit = DMAC_INT_BIT_TX_STOP_(tx->channel_number);
+
+		dmac_int_en &= (ioc_bit | stop_bit);
+		dmac_int_sts &= dmac_int_en;
+
+		if (dmac_int_sts & ioc_bit) {
+			tasklet_schedule(&tx->tx_isr_bottom_half);
+			enable_flag = 0;/* tasklet will re-enable later */
+		}
+		if (dmac_int_sts & stop_bit) {
+			NETIF_ERROR(adapter, drv, adapter->netdev,
+				    "unhandled tx stop interrupt");
+			/* clear dmac int sts */
+			lan743x_csr_write(adapter, DMAC_INT_STS, stop_bit);
+		}
+	} else {
+		NETIF_ERROR(adapter, drv, adapter->netdev,
+			    "unexpected interrupt, INT_BIT_DMA_TX_(%d) == 0",
+			    tx->channel_number);
+	}
+	if (enable_flag)
+		/* enable isr */
+		lan743x_csr_write(adapter, INT_EN_SET,
+				  INT_BIT_DMA_TX_(tx->channel_number));
+}
+
+static void lan743x_tx_release_desc(struct lan743x_tx *tx,
+				    int descriptor_index, bool cleanup)
+{
+	struct lan743x_adapter *adapter = tx->adapter;
+	struct lan743x_tx_descriptor *descriptor = NULL;
+	struct lan743x_tx_buffer_info *buffer_info = NULL;
+	u32 descriptor_type = 0;
+
+	NETIF_ASSERT(adapter, drv, adapter->netdev, (descriptor_index >= 0) &&
+		     (descriptor_index < tx->ring_size));
+
+	descriptor = &tx->ring_cpu_ptr[descriptor_index];
+	buffer_info = &tx->buffer_info[descriptor_index];
+	if (!(buffer_info->flags & TX_BUFFER_INFO_FLAG_ACTIVE)) {
+		NETIF_ASSERT(adapter, drv, adapter->netdev, !buffer_info->skb);
+		NETIF_ASSERT(adapter, drv, adapter->netdev,
+			     !buffer_info->dma_ptr);
+		NETIF_ASSERT(adapter, drv, adapter->netdev,
+			     !buffer_info->buffer_length);
+		goto done;
+	}
+
+	descriptor_type = (descriptor->data0) &
+			  TX_DESC_DATA0_DTYPE_MASK_;
+	if (descriptor_type == TX_DESC_DATA0_DTYPE_DATA_) {
+		goto clean_up_data_descriptor;
+	} else if (descriptor_type == TX_DESC_DATA0_DTYPE_EXT_) {
+		/* ignore extension type */
+		NETIF_ASSERT(adapter, drv, adapter->netdev, !buffer_info->skb);
+		NETIF_ASSERT(adapter, drv, adapter->netdev,
+			     !buffer_info->dma_ptr);
+		NETIF_ASSERT(adapter, drv, adapter->netdev,
+			     !buffer_info->buffer_length);
+		goto clear_active;
+	} else {
+		NETIF_ERROR(adapter, drv, adapter->netdev,
+			    "Unexpected descriptor type");
+		goto clear_active;
+	}
+clean_up_data_descriptor:
+	if (buffer_info->dma_ptr) {
+		if (buffer_info->flags &
+		    TX_BUFFER_INFO_FLAG_SKB_FRAGMENT) {
+			NETIF_ASSERT(adapter, drv, adapter->netdev,
+				     !(descriptor->data0 &
+				     TX_DESC_DATA0_FS_));
+			dma_unmap_page(&tx->adapter->pci.pdev->dev,
+				       buffer_info->dma_ptr,
+				       buffer_info->buffer_length,
+				       DMA_TO_DEVICE);
+		} else {
+			NETIF_ASSERT(adapter, drv, adapter->netdev,
+				     (descriptor->data0 &
+				     TX_DESC_DATA0_FS_));
+			dma_unmap_single(&tx->adapter->pci.pdev->dev,
+					 buffer_info->dma_ptr,
+					 buffer_info->buffer_length,
+					 DMA_TO_DEVICE);
+		}
+		buffer_info->dma_ptr = 0;
+		buffer_info->buffer_length = 0;
+	} else {
+		NETIF_ERROR(adapter, drv, adapter->netdev,
+			    "buffer_info->phys_ptr == NULL at %d",
+			    descriptor_index);
+	}
+	if (buffer_info->skb) {
+		NETIF_ASSERT(adapter, drv, adapter->netdev,
+			     (descriptor->data0 &
+			     TX_DESC_DATA0_LS_));
+		if (buffer_info->flags &
+		    TX_BUFFER_INFO_FLAG_TIMESTAMP_REQUESTED) {
+			if (cleanup) {
+				lan743x_ptp_unrequest_tx_timestamp(tx->adapter);
+				dev_kfree_skb(buffer_info->skb);
+			} else {
+				lan743x_ptp_tx_timestamp_skb(tx->adapter,
+							     buffer_info->skb);
+			}
+		} else {
+			dev_kfree_skb(buffer_info->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 inline 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 ((*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)
+{
+	struct lan743x_adapter *adapter = tx->adapter;
+	int result = 1;/* 1 for the main skb buffer */
+	int nr_frags = 0;
+
+	NETIF_ASSERT(adapter, drv, adapter->netdev, skb);
+	if (skb_is_gso(skb))
+		result++;/* requires an extension descriptor */
+	nr_frags = skb_shinfo(skb)->nr_frags;
+	NETIF_ASSERT(adapter, drv, adapter->netdev, nr_frags >= 0);
+	result += nr_frags; /* 1 for each fragment buffer */
+	return result;
+}
+
+static int lan743x_tx_get_avail_desc(struct lan743x_tx *tx)
+{
+	struct lan743x_adapter *adapter = tx->adapter;
+	int last_head = tx->last_head;
+	int last_tail = tx->last_tail;
+
+	NETIF_ASSERT(adapter, drv, adapter->netdev,
+		     (last_tail >= 0) && (last_tail < tx->ring_size));
+	NETIF_ASSERT(adapter, drv, adapter->netdev,
+		     (last_head >= 0) && (last_head < tx->ring_size));
+	if (last_tail >= last_head)
+		return tx->ring_size - last_tail + last_head - 1;
+	else
+		return last_head - last_tail - 1;
+}
+
+static void lan743x_tx_isr_bottom_half(unsigned long param)
+{
+	unsigned long irq_flags = 0;
+	struct lan743x_tx *tx = NULL;
+	struct lan743x_adapter *adapter = NULL;
+	bool start_transmitter = false;
+	u32 ioc_bit = 0;
+
+	tx = (struct lan743x_tx *)param;
+	adapter = tx->adapter;
+	NETIF_ASSERT(adapter, drv, adapter->netdev, tx->ring_cpu_ptr);
+	ioc_bit = DMAC_INT_BIT_TX_IOC_(tx->channel_number);
+
+	spin_lock_irqsave(&tx->ring_lock, irq_flags);
+	do {
+		/* clear dmac int sts */
+		lan743x_csr_write(adapter, DMAC_INT_STS, ioc_bit);
+		lan743x_csr_read(adapter, DMAC_INT_STS);
+
+		/* clean up tx ring */
+		lan743x_tx_release_completed_descriptors(tx);
+	} while (lan743x_csr_read(adapter, DMAC_INT_STS) & ioc_bit);
+
+	if (netif_queue_stopped(tx->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_WARNING(adapter, drv, adapter->netdev,
+				      "Why was queue stopped, with out any overflow skb?");
+			netif_wake_queue(tx->adapter->netdev);
+		}
+	} else if (tx->overflow_skb) {
+		NETIF_WARNING(adapter, drv, adapter->netdev,
+			      "why is queue not stopped when overflow skb is used");
+	}
+	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);
+	}
+
+	/* enable isr */
+	lan743x_csr_write(adapter, INT_EN_SET,
+			  INT_BIT_DMA_TX_(tx->channel_number));
+	lan743x_csr_read(adapter, INT_STS);
+}
+
+static int lan743x_tx_ring_init(struct lan743x_tx *tx)
+{
+	int ret = -ENOMEM;
+	int descriptor_spacing = 0;
+	size_t ring_allocation_size = 0;
+	dma_addr_t dma_ptr;
+	void *cpu_ptr = NULL;
+	struct lan743x_adapter *adapter = tx->adapter;
+
+	NETIF_ASSERT(adapter, drv, adapter->netdev, tx->adapter);
+	NETIF_ASSERT(adapter, drv, adapter->netdev, !tx->ring_size);
+	NETIF_ASSERT(adapter, drv, adapter->netdev, !tx->ring_allocation_size);
+	NETIF_ASSERT(adapter, drv, adapter->netdev, !tx->ring_cpu_ptr);
+	NETIF_ASSERT(adapter, drv, adapter->netdev, !tx->ring_dma_ptr);
+	NETIF_ASSERT(adapter, drv, adapter->netdev, !tx->buffer_info);
+	NETIF_ASSERT(adapter, drv, adapter->netdev, !tx->head_cpu_ptr);
+	NETIF_ASSERT(adapter, drv, adapter->netdev, !tx->head_dma_ptr);
+
+	descriptor_spacing = lan743x_dmac_get_descriptor_spacing(tx->adapter);
+	if (sizeof(struct lan743x_tx_descriptor) != descriptor_spacing)	{
+		NETIF_ERROR(adapter, drv, adapter->netdev,
+			    "sizeof(struct lan743x_tx_descriptor) != descriptor_spacing");
+		ret = -EPERM;
+		goto cleanup;
+	}
+
+	tx->ring_size = LAN743X_TX_RING_SIZE;
+
+	if ((tx->ring_size) & (~TX_CFG_B_TX_RING_LEN_MASK_)) {
+		NETIF_ERROR(adapter, drv, adapter->netdev,
+			    "ring size is too large, tx_channel = %d",
+			    tx->channel_number);
+		ret = -EINVAL;
+		goto cleanup;
+	}
+
+	ring_allocation_size = ALIGN(tx->ring_size * descriptor_spacing,
+				     PAGE_SIZE);
+
+	dma_ptr = 0;
+	cpu_ptr = pci_zalloc_consistent(tx->adapter->pci.pdev,
+					ring_allocation_size, &dma_ptr);
+	if (!cpu_ptr) {
+		NETIF_ERROR(adapter, drv, adapter->netdev,
+			    "Failed to allocate tx ring, channel = %d",
+			    tx->channel_number);
+		ret = -ENOMEM;
+		goto cleanup;
+	}
+	NETIF_ASSERT(adapter, drv, adapter->netdev, dma_ptr);
+	tx->ring_allocation_size = ring_allocation_size;
+	tx->ring_cpu_ptr = (struct lan743x_tx_descriptor *)cpu_ptr;
+	tx->ring_dma_ptr = dma_ptr;
+	if ((tx->ring_dma_ptr) & 0x3) {
+		NETIF_ERROR(adapter, drv, adapter->netdev,
+			    "dma ring base is not DWORD aligned, channel = %d",
+			    tx->channel_number);
+		ret = -ENOMEM;
+		goto cleanup;
+	}
+
+	cpu_ptr = kzalloc(tx->ring_size * sizeof(*tx->buffer_info), GFP_KERNEL);
+	if (!cpu_ptr) {
+		NETIF_ERROR(adapter, drv, adapter->netdev,
+			    "Failed to allocate buffer info, channel = %d",
+			    tx->channel_number);
+		ret = -ENOMEM;
+		goto cleanup;
+	}
+	tx->buffer_info = (struct lan743x_tx_buffer_info *)cpu_ptr;
+
+	dma_ptr = 0;
+	cpu_ptr = pci_zalloc_consistent(tx->adapter->pci.pdev,
+					sizeof(*tx->head_cpu_ptr), &dma_ptr);
+	if (!cpu_ptr) {
+		NETIF_ERROR(adapter, drv, adapter->netdev,
+			    "Failed to allocate head pointer, channel = %d",
+			    tx->channel_number);
+		ret = -ENOMEM;
+		goto cleanup;
+	}
+	NETIF_ASSERT(adapter, drv, adapter->netdev, dma_ptr);
+	tx->head_cpu_ptr = cpu_ptr;
+	tx->head_dma_ptr = dma_ptr;
+	if ((tx->head_dma_ptr) & 0x3) {
+		NETIF_ERROR(adapter, drv, adapter->netdev,
+			    "head write back pointer is not DWORD aligned, channel = %d",
+			    tx->channel_number);
+		ret = -ENOMEM;
+		goto cleanup;
+	}
+
+	ret = 0;
+cleanup:
+	if (ret)
+		lan743x_tx_ring_cleanup(tx);
+	return ret;
+}
+
+static void lan743x_tx_ring_cleanup(struct lan743x_tx *tx)
+{
+	if (tx->head_cpu_ptr) {
+		pci_free_consistent(tx->adapter->pci.pdev,
+				    sizeof(*tx->head_cpu_ptr),
+				    (void *)(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) {
+		pci_free_consistent(tx->adapter->pci.pdev,
+				    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_init(struct lan743x_tx *tx,
+			   struct lan743x_adapter *adapter, int tx_channel)
+{
+	int ret = -ENODEV;
+
+	NETIF_ASSERT(adapter, probe, adapter->netdev, tx);
+	NETIF_ASSERT(adapter, probe, adapter->netdev, adapter);
+	memset(tx, 0, sizeof(*tx));
+	NETIF_ASSERT(adapter, probe, adapter->netdev, (tx_channel >= 0) &&
+		     (tx_channel < LAN743X_NUMBER_OF_TX_CHANNELS));
+
+	tx->adapter = adapter;
+	tx->channel_number = -1;
+
+	ret = lan743x_dmac_reserve_tx_channel(adapter, tx_channel);
+	if (ret) {
+		NETIF_ERROR(adapter, probe, adapter->netdev,
+			    "Failed to reserve tx channel %d", tx_channel);
+		goto cleanup;
+	}
+	tx->channel_number = tx_channel;
+
+	spin_lock_init(&tx->ring_lock);
+
+	tasklet_init(&tx->tx_isr_bottom_half,
+		     lan743x_tx_isr_bottom_half, (unsigned long)tx);
+	tasklet_disable(&tx->tx_isr_bottom_half);
+
+	ret = 0;
+
+cleanup:
+	if (ret)
+		lan743x_tx_cleanup(tx);
+	return ret;
+}
+
+static void lan743x_tx_cleanup(struct lan743x_tx *tx)
+{
+	struct lan743x_adapter *adapter = tx->adapter;
+
+	if (tx->channel_number >= 0) {
+		lan743x_dmac_release_tx_channel(adapter, tx->channel_number);
+		tx->channel_number = -1;
+	}
+
+	memset(tx, 0, sizeof(*tx));
+}
+
+static int lan743x_tx_open(struct lan743x_tx *tx)
+{
+	int ret = -ENODEV;
+	struct lan743x_adapter *adapter = NULL;
+	u32 data = 0;
+
+	NETIF_ASSERT(adapter, ifup, adapter->netdev,
+		     (tx->channel_number >= 0) &&
+		     (tx->channel_number < LAN743X_NUMBER_OF_TX_CHANNELS));
+	adapter = tx->adapter;
+
+	ret = lan743x_tx_ring_init(tx);
+	if (ret) {
+		NETIF_ERROR(adapter, ifup, adapter->netdev,
+			    "Tx Channel = %d, failed to initialize dma ring",
+			    tx->channel_number);
+		ret = -ENOMEM;
+		goto cleanup;
+	}
+	tx->flags |= TX_FLAG_RING_ALLOCATED;
+
+	/* enable mac */
+	ret = lan743x_mac_tx_enable(adapter, tx->channel_number);
+	if (ret) {
+		NETIF_ERROR(adapter, ifup, adapter->netdev,
+			    "failed to enable mac, tx_channel = %d",
+			    tx->channel_number);
+		goto cleanup;
+	}
+	tx->flags |= TX_FLAG_MAC_ENABLED;
+
+	/* initialize fifo */
+	NETIF_ASSERT(adapter, ifup, adapter->netdev,
+		     !(tx->flags & TX_FLAG_FIFO_ENABLED));
+	ret = lan743x_fct_tx_reset(adapter, tx->channel_number);
+	if (ret) {
+		NETIF_ERROR(adapter, ifup, adapter->netdev,
+			    "Failed to reset tx fifo, tx_channel = %d",
+			    tx->channel_number);
+		goto cleanup;
+	}
+
+	/* enable fifo */
+	ret = lan743x_fct_tx_enable(adapter, tx->channel_number);
+	if (ret) {
+		NETIF_ERROR(adapter, ifup, adapter->netdev,
+			    "Failed to enable tx fifo, tx_channel = %d",
+			    tx->channel_number);
+		goto cleanup;
+	}
+	tx->flags |= TX_FLAG_FIFO_ENABLED;
+
+	/* reset tx channel */
+	ret = lan743x_dmac_tx_reset(adapter, tx->channel_number);
+	if (ret) {
+		NETIF_ERROR(adapter, ifup, adapter->netdev,
+			    "Failed to reset tx dmac, tx_channel = %d",
+			    tx->channel_number);
+		goto cleanup;
+	}
+
+	/* Write TX_BASE_ADDR */
+	NETIF_ASSERT(adapter, ifup, adapter->netdev,
+		     !((tx->ring_dma_ptr) & 0x3));
+	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 */
+	NETIF_ASSERT(adapter, ifup, adapter->netdev,
+		     !((tx->ring_size) & (~TX_CFG_B_TX_RING_LEN_MASK_)));
+	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_);
+	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_;
+	lan743x_csr_write(adapter, TX_CFG_A(tx->channel_number), data);
+
+	/* Write TX_HEAD_WRITEBACK_ADDR */
+	NETIF_ASSERT(adapter, ifup, adapter->netdev,
+		     !((tx->head_dma_ptr) & 0x3));
+	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));
+	NETIF_ASSERT(adapter, ifup, adapter->netdev, !tx->last_head);
+
+	/* write TX_TAIL */
+	tx->last_tail = 0;
+	lan743x_csr_write(adapter, TX_TAIL(tx->channel_number),
+			  (u32)(tx->last_tail));
+
+	tasklet_enable(&tx->tx_isr_bottom_half);
+	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));
+	tx->flags |= TX_FLAG_ISR_ENABLED;
+
+	/*  start dmac channel */
+	ret = lan743x_dmac_tx_start(adapter, tx->channel_number);
+	if (ret) {
+		NETIF_ERROR(adapter, ifup, adapter->netdev,
+			    "Failed to start tx channel %d",
+			    tx->channel_number);
+		goto cleanup;
+	}
+	tx->flags |= TX_FLAG_DMAC_STARTED;
+
+	ret = 0;
+
+cleanup:
+	if (ret)
+		lan743x_tx_close(tx);
+	return ret;
+}
+
+static void lan743x_tx_close(struct lan743x_tx *tx)
+{
+	struct lan743x_adapter *adapter = tx->adapter;
+
+	if (tx->flags & TX_FLAG_DMAC_STARTED) {
+		lan743x_dmac_tx_stop(adapter, tx->channel_number);
+		tx->flags &= ~TX_FLAG_DMAC_STARTED;
+	}
+	if (tx->flags & TX_FLAG_ISR_ENABLED) {
+		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));
+		tasklet_disable(&tx->tx_isr_bottom_half);
+		tx->flags &= ~TX_FLAG_ISR_ENABLED;
+	}
+
+	if (tx->flags & TX_FLAG_FIFO_ENABLED) {
+		lan743x_fct_tx_disable(adapter, tx->channel_number);
+		tx->flags &= ~TX_FLAG_FIFO_ENABLED;
+	}
+
+	if (tx->flags & TX_FLAG_MAC_ENABLED) {
+		lan743x_mac_tx_disable(adapter, tx->channel_number);
+		tx->flags &= ~TX_FLAG_MAC_ENABLED;
+	}
+
+	lan743x_tx_release_all_descriptors(tx);
+
+	if (tx->overflow_skb) {
+		dev_kfree_skb(tx->overflow_skb);
+		tx->overflow_skb = NULL;
+	}
+
+	if (tx->flags & TX_FLAG_RING_ALLOCATED) {
+		lan743x_tx_ring_cleanup(tx);
+		tx->flags &= ~TX_FLAG_RING_ALLOCATED;
+	}
+}
+
+static void lan743x_tx_set_timestamping_enable(struct lan743x_tx *tx,
+					       bool enabled)
+{
+	if (enabled)
+		tx->flags |= TX_FLAG_TIMESTAMPING_ENABLED;
+	else
+		tx->flags &= ~TX_FLAG_TIMESTAMPING_ENABLED;
+}
+
+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_adapter *adapter = tx->adapter;
+	struct lan743x_tx_descriptor *tx_descriptor = NULL;
+	struct lan743x_tx_buffer_info *buffer_info = NULL;
+	struct device *dev = &adapter->pci.pdev->dev;
+	dma_addr_t dma_ptr;
+
+	NETIF_ASSERT(adapter, tx_queued, adapter->netdev, first_buffer);
+	NETIF_ASSERT(adapter, tx_queued, adapter->netdev,
+		     !(tx->frame_flags & TX_FRAME_FLAG_IN_PROGRESS));
+
+	tx->frame_flags |= TX_FRAME_FLAG_IN_PROGRESS;
+
+	tx->frame_first = lan743x_csr_read(adapter,
+					   TX_TAIL(tx->channel_number));
+	tx->frame_tail = tx->frame_first;
+
+	if (tx->frame_tail != tx->last_tail) {
+		NETIF_ERROR(adapter, tx_queued, adapter->netdev,
+			    "unexpected tail index, tail=%d, last_tail=%d",
+			    tx->frame_tail, tx->last_tail);
+		return -EPERM;
+	}
+
+	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)) {
+		NETIF_ERROR(adapter, tx_queued, adapter->netdev,
+			    "DMA mapping error");
+		return -ENOMEM;
+	}
+
+	tx_descriptor->data1 = DMA_ADDR_LOW32(dma_ptr);
+	tx_descriptor->data2 = DMA_ADDR_HIGH32(dma_ptr);
+	tx_descriptor->data3 = (frame_length << 16) &
+			       TX_DESC_DATA3_FRAME_LENGTH_MSS_MASK_;
+
+	NETIF_ASSERT(adapter, tx_queued, adapter->netdev,
+		     !((buffer_info->flags) & TX_BUFFER_INFO_FLAG_ACTIVE));
+	NETIF_ASSERT(adapter, tx_queued, adapter->netdev, !buffer_info->skb);
+
+	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)
+{
+	/* called only from within lan743x_tx_xmit_frame.
+	 * assuming tx->ring_lock has already been acquired.
+	 */
+	struct lan743x_adapter *adapter = tx->adapter;
+	struct lan743x_tx_descriptor *tx_descriptor = NULL;
+	struct lan743x_tx_buffer_info *buffer_info = NULL;
+
+	NETIF_ASSERT(adapter, tx_queued, adapter->netdev,
+		     (tx->frame_flags & TX_FRAME_FLAG_IN_PROGRESS));
+
+	/* wrap up previous descriptor */
+	tx->frame_data0 |= TX_DESC_DATA0_EXT_;
+	tx_descriptor = &tx->ring_cpu_ptr[tx->frame_tail];
+	tx_descriptor->data0 = 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 struct skb_frag_struct *fragment,
+					 unsigned int frame_length)
+{
+	/* called only from within lan743x_tx_xmit_frame
+	 * assuming tx->ring_lock has already been acquired
+	 */
+	struct lan743x_adapter *adapter = tx->adapter;
+	struct lan743x_tx_descriptor *tx_descriptor = NULL;
+	struct lan743x_tx_buffer_info *buffer_info = NULL;
+	unsigned int fragment_length = 0;
+	struct device *dev = &adapter->pci.pdev->dev;
+	dma_addr_t dma_ptr;
+
+	NETIF_ASSERT(adapter, tx_queued, adapter->netdev,
+		     (tx->frame_flags & TX_FRAME_FLAG_IN_PROGRESS));
+
+	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 = 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;
+
+		NETIF_ERROR(adapter, tx_queued, adapter->netdev,
+			    "fragment, DMA mapping error");
+
+		/* 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 = DMA_ADDR_LOW32(dma_ptr);
+	tx_descriptor->data2 = DMA_ADDR_HIGH32(dma_ptr);
+	tx_descriptor->data3 = (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)
+{
+	/* called only from within lan743x_tx_xmit_frame
+	 * assuming tx->ring_lock has already been acquired
+	 */
+	struct lan743x_adapter *adapter = tx->adapter;
+	struct lan743x_tx_descriptor *tx_descriptor = NULL;
+	struct lan743x_tx_buffer_info *buffer_info = NULL;
+
+	NETIF_ASSERT(adapter, tx_queued, adapter->netdev,
+		     (tx->frame_flags & TX_FRAME_FLAG_IN_PROGRESS));
+
+	/* wrap up previous descriptor */
+	NETIF_ASSERT(adapter, tx_queued, adapter->netdev,
+		     !(tx->frame_data0 & TX_DESC_DATA0_DTYPE_EXT_));
+	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;
+	tx_descriptor->data0 = tx->frame_data0;
+
+	tx->frame_tail = lan743x_tx_next_index(tx, tx->frame_tail);
+	tx->last_tail = tx->frame_tail;
+
+	dma_wmb();
+
+	lan743x_csr_write(adapter, TX_TAIL(tx->channel_number), 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)
+{
+	unsigned long irq_flags = 0;
+	int required_number_of_descriptors = 0;
+	struct lan743x_adapter *adapter = tx->adapter;
+	unsigned int frame_length = 0;
+	unsigned int head_length = 0;
+	unsigned int start_frame_length = 0;
+	int nr_frags = 0;
+	bool do_timestamp = false;
+	bool gso = false;
+	int j;
+
+	NETIF_ASSERT(adapter, tx_queued, adapter->netdev, skb);
+
+	if (skb->len > 0xFFFF) {
+		NETIF_WARNING(adapter, tx_queued, adapter->netdev,
+			      "dropping packet, length too large, skb->len = %d",
+			      skb->len);
+		dev_kfree_skb(skb);
+		return NETDEV_TX_OK;
+	}
+
+	spin_lock_irqsave(&tx->ring_lock, irq_flags);
+
+	required_number_of_descriptors = lan743x_tx_get_desc_cnt(tx, skb);
+	if (required_number_of_descriptors >
+		lan743x_tx_get_avail_desc(tx)) {
+		if (required_number_of_descriptors > (tx->ring_size - 1)) {
+			NETIF_WARNING(adapter, tx_queued, adapter->netdev,
+				      "dropping packet, requires too many descriptors, %d",
+				      required_number_of_descriptors);
+			dev_kfree_skb(skb);
+		} else {
+			/* save to overflow buffer */
+			NETIF_ASSERT(adapter, tx_queued, adapter->netdev,
+				     !tx->overflow_skb);
+			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) {
+		if (tx->flags & TX_FLAG_TIMESTAMPING_ENABLED) {
+			if (lan743x_ptp_request_tx_timestamp(adapter)) {
+				skb_shinfo(skb)->tx_flags |= SKBTX_IN_PROGRESS;
+				do_timestamp = true;
+			} else {
+				NETIF_WARNING(adapter, tx_queued,
+					      adapter->netdev,
+					      "Timestamp request denied, too many requests in progress");
+			}
+		} else {
+			NETIF_WARNING(adapter, tx_queued, adapter->netdev,
+				      "Tx Timestamp requested but tx timestamping is not enabled");
+		}
+	}
+
+	head_length = skb_headlen(skb);
+	frame_length = skb_pagelen(skb);
+	nr_frags = skb_shinfo(skb)->nr_frags;
+	if (!nr_frags) {
+		NETIF_ASSERT(adapter, tx_queued, adapter->netdev,
+			     head_length == frame_length);
+	}
+	start_frame_length = frame_length;
+	gso = skb_is_gso(skb);
+	if (gso) {
+		if (nr_frags <= 0) {
+			NETIF_ERROR(adapter, tx_queued, adapter->netdev,
+				    "Large segment requested, but no fragments");
+			dev_kfree_skb(skb);
+			goto unlock;
+		}
+		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)) {
+		NETIF_ERROR(adapter, tx_queued, adapter->netdev,
+			    "frame start error");
+		dev_kfree_skb(skb);
+		goto unlock;
+	}
+
+	if (gso) {
+		NETIF_ASSERT(adapter, tx_queued, adapter->netdev,
+			     nr_frags > 0);
+		lan743x_tx_frame_add_lso(tx, frame_length);
+	}
+
+	if (nr_frags <= 0) {
+		NETIF_ASSERT(adapter, tx_queued, adapter->netdev,
+			     !nr_frags);
+		goto finish;
+	}
+
+	for (j = 0; j < nr_frags; j++) {
+		const struct skb_frag_struct *frag;
+
+		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
+			 */
+			NETIF_ERROR(adapter, tx_queued, adapter->netdev,
+				    "Error adding fragment to DMA ring");
+			dev_kfree_skb(skb);
+			goto unlock;
+		}
+	}
+
+finish:
+	lan743x_tx_frame_end(tx, skb, do_timestamp);
+unlock:
+	spin_unlock_irqrestore(&tx->ring_lock, irq_flags);
+	return NETDEV_TX_OK;
+}
+
+/* RX */
+
+/* OWN bit is set. ie, Descs are owned by RX DMAC */
+#define RX_DESC_DATA0_OWN_                (0x00008000)
+#define RX_DESC_DATA0_LENGTH_MASK_        (0x00003FFF)
+#define RX_DESC_DATA1_RADDRL_MASK_        (0xFFFFFFFF)
+#define RX_DESC_DATA2_RADDRH_MASK_        (0xFFFFFFFF)
+
+/* OWN bit is clear. ie, Descs are owned by host */
+#define RX_DESC_DATA0_FS_                 (0x80000000)
+#define RX_DESC_DATA0_LS_                 (0x40000000)
+#define RX_DESC_DATA0_FRAME_LENGTH_MASK_  (0x3FFF0000)
+#define RX_DESC_DATA0_FRAME_LENGTH_GET_(data0) \
+	(((data0) & RX_DESC_DATA0_FRAME_LENGTH_MASK_) >> 16)
+#define RX_DESC_DATA0_EXT_                (0x00004000)
+#define RX_DESC_DATA0_BUF_LENGTH_MASK_    (0x00003FFF)
+#define RX_DESC_DATA1_RSS_TYPE_MASK_      (0xF0000000)
+#define RX_DESC_DATA1_RX_STATUS_MASK_     (0x00FFFFFF)
+#define RX_DESC_DATA1_RX_STATUS_PRI_      (0x00800000)
+#define RX_DESC_DATA1_RX_STATUS_LEN_ERR_  (0x00400000)
+#define RX_DESC_DATA1_RX_STATUS_TS_       (0x00200000)
+#define RX_DESC_DATA1_RX_STATUS_1588_     (0x00100000)
+#define RX_DESC_DATA1_RX_STATUS_WAKE_     (0x00080000)
+#define RX_DESC_DATA1_RX_STATUS_RFE_FAIL_ (0x00040000)
+#define RX_DESC_DATA1_RX_STATUS_ICE_      (0x00020000)
+#define RX_DESC_DATA1_RX_STATUS_TCE_      (0x00010000)
+#define RX_DESC_DATA1_RX_STATUS_IPV_      (0x00008000)
+#define RX_DESC_DATA1_RX_STATUS_PID_MASK_ (0x00006000)
+#define RX_DESC_DATA1_RX_STATUS_PFF_      (0x00001000)
+#define RX_DESC_DATA1_RX_STATUS_BAM_      (0x00000800)
+#define RX_DESC_DATA1_RX_STATUS_MAM_      (0x00000400)
+#define RX_DESC_DATA1_RX_STATUS_FVTG_     (0x00000200)
+#define RX_DESC_DATA1_RX_STATUS_RED_      (0x00000100)
+#define RX_DESC_DATA1_RX_STATUS_RWT_      (0x00000080)
+#define RX_DESC_DATA1_RX_STATUS_RUNT_     (0x00000040)
+#define RX_DESC_DATA1_RX_STATUS_LONG_     (0x00000020)
+#define RX_DESC_DATA1_RX_STATUS_RXE_      (0x00000010)
+#define RX_DESC_DATA1_RX_STATUS_ALN_      (0x00000008)
+#define RX_DESC_DATA1_RX_STATUS_FCS_      (0x00000004)
+#define RX_DESC_DATA1_RX_STATUS_UAM_      (0x00000002)
+#define RX_DESC_DATA1_RX_STATUS_ICSM_     (0x00000001)
+
+#define RX_DESC_DATA2_CSUM_MASK_          (0xFFFF0000)
+#define RX_DESC_DATA2_VTAG_MASK_          (0x0000FFFF)
+#define RX_DESC_DATA2_TS_NS_MASK_         (0x3FFFFFFF)
+
+#define RX_DESC_DATA3_RSSHASH_MASK_       (0xFFFFFFFF)
+
+#if ((NET_IP_ALIGN != 0) && (NET_IP_ALIGN != 2))
+#error NET_IP_ALIGN must be 0 or 2
+#endif
+
+#define RX_HEAD_PADDING		NET_IP_ALIGN
+
+struct lan743x_rx_descriptor {
+	u32     data0;
+	u32     data1;
+	u32     data2;
+	u32     data3;
+} __aligned(DEFAULT_DMA_DESCRIPTOR_SPACING);
+
+#define RX_BUFFER_INFO_FLAG_ACTIVE      BIT(0)
+struct lan743x_rx_buffer_info {
+	int flags;
+	struct sk_buff *skb;
+
+	dma_addr_t      dma_ptr;
+	unsigned int    buffer_length;
+};
+
+#define LAN743X_RX_RING_SIZE        (65)
+
+static inline int lan743x_rx_next_index(struct lan743x_rx *rx, int index)
+{
+	return ((++index) % rx->ring_size);
+}
+
+static int lan743x_rx_allocate_ring_element(struct lan743x_rx *rx,
+					    int element_index)
+{
+	int ret = 0;
+	struct lan743x_rx_descriptor *descriptor;
+	struct lan743x_rx_buffer_info *buffer_info;
+	int length = 0;
+	struct lan743x_adapter *adapter = rx->adapter;
+
+	NETIF_ASSERT(adapter, drv, adapter->netdev, (element_index >= 0) &&
+		     (element_index < rx->ring_size));
+	NETIF_ASSERT(adapter, drv, adapter->netdev, rx->ring_cpu_ptr);
+	NETIF_ASSERT(adapter, drv, adapter->netdev, rx->buffer_info);
+	length = (LAN743X_MAX_FRAME_SIZE + ETH_HLEN + 4 + RX_HEAD_PADDING);
+	descriptor = &rx->ring_cpu_ptr[element_index];
+	buffer_info = &rx->buffer_info[element_index];
+
+	NETIF_ASSERT(adapter, drv, adapter->netdev,
+		     !(descriptor->data0 & RX_DESC_DATA0_OWN_));
+	NETIF_ASSERT(adapter, drv, adapter->netdev, !buffer_info->skb);
+	NETIF_ASSERT(adapter, drv, adapter->netdev, !buffer_info->dma_ptr);
+	NETIF_ASSERT(adapter, drv, adapter->netdev,
+		     !buffer_info->buffer_length);
+
+	buffer_info->skb = __netdev_alloc_skb(rx->adapter->netdev,
+					      length,
+					      GFP_ATOMIC | GFP_DMA);
+	if (!(buffer_info->skb)) {
+		ret = -ENOMEM;
+		goto done;
+	}
+
+	buffer_info->dma_ptr = dma_map_single(&rx->adapter->pci.pdev->dev,
+					      buffer_info->skb->data,
+					      length,
+					      DMA_FROM_DEVICE);
+	if (dma_mapping_error(&rx->adapter->pci.pdev->dev,
+			      buffer_info->dma_ptr)) {
+		buffer_info->dma_ptr = 0;
+		ret = -ENOMEM;
+		goto done;
+	}
+	buffer_info->buffer_length = length;
+
+	descriptor->data1 = DMA_ADDR_LOW32(buffer_info->dma_ptr);
+	descriptor->data2 = DMA_ADDR_HIGH32(buffer_info->dma_ptr);
+	descriptor->data3 = 0;
+	descriptor->data0 = (RX_DESC_DATA0_OWN_ |
+			    (length & RX_DESC_DATA0_BUF_LENGTH_MASK_));
+
+	skb_reserve(buffer_info->skb, RX_HEAD_PADDING);
+
+	ret = 0;
+done:
+	return ret;
+}
+
+static void lan743x_rx_reuse_ring_element(struct lan743x_rx *rx,
+					  int element_index)
+{
+	struct lan743x_rx_descriptor *descriptor;
+	struct lan743x_rx_buffer_info *buffer_info;
+	struct lan743x_adapter *adapter = rx->adapter;
+
+	descriptor = &rx->ring_cpu_ptr[element_index];
+	buffer_info = &rx->buffer_info[element_index];
+	NETIF_ASSERT(adapter, drv, adapter->netdev,
+		     !(descriptor->data0 & RX_DESC_DATA0_OWN_));
+	NETIF_ASSERT(adapter, drv, adapter->netdev, buffer_info->skb);
+	NETIF_ASSERT(adapter, drv, adapter->netdev, buffer_info->dma_ptr);
+	NETIF_ASSERT(adapter, drv, adapter->netdev,
+		     buffer_info->buffer_length);
+
+	descriptor->data1 = DMA_ADDR_LOW32(buffer_info->dma_ptr);
+	descriptor->data2 = DMA_ADDR_HIGH32(buffer_info->dma_ptr);
+	descriptor->data3 = 0;
+	descriptor->data0 = (RX_DESC_DATA0_OWN_ |
+			    ((buffer_info->buffer_length) &
+			    RX_DESC_DATA0_BUF_LENGTH_MASK_));
+}
+
+static void lan743x_rx_release_ring_element(struct lan743x_rx *rx,
+					    int element_index)
+{
+	struct lan743x_rx_descriptor *descriptor;
+	struct lan743x_rx_buffer_info *buffer_info;
+	struct lan743x_adapter *adapter = rx->adapter;
+
+	NETIF_ASSERT(adapter, drv, adapter->netdev, (element_index >= 0) &&
+		     (element_index < rx->ring_size));
+	descriptor = &rx->ring_cpu_ptr[element_index];
+	buffer_info = &rx->buffer_info[element_index];
+	memset(descriptor, 0, sizeof(*descriptor));
+	if (buffer_info->dma_ptr) {
+		dma_unmap_single(&rx->adapter->pci.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 void lan743x_rx_isr(void *context, u32 int_sts)
+{
+	int enable_flag = 1;
+	struct lan743x_rx *rx = (struct lan743x_rx *)context;
+	struct lan743x_adapter *adapter = rx->adapter;
+
+	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 dmac_int_sts = lan743x_csr_read(adapter, DMAC_INT_STS);
+		u32 dmac_int_en = lan743x_csr_read(adapter, DMAC_INT_EN_SET);
+		u32 rx_frame_bit = DMAC_INT_BIT_RXFRM_(rx->channel_number);
+		u32 stop_bit = DMAC_INT_BIT_RX_STOP_(rx->channel_number);
+
+		dmac_int_en &= (rx_frame_bit | stop_bit);
+		dmac_int_sts &= dmac_int_en;
+		if (dmac_int_sts & rx_frame_bit) {
+			napi_schedule(&rx->napi);
+			enable_flag = 0;/* poll function will re-enable later */
+		}
+		if (dmac_int_sts & stop_bit) {
+			NETIF_ERROR(adapter, drv, adapter->netdev,
+				    "unhandled rx stop interrupt");
+			/* clear dmac int sts */
+			lan743x_csr_write(adapter, DMAC_INT_STS, stop_bit);
+		}
+	} else {
+		NETIF_ERROR(adapter, drv, adapter->netdev,
+			    "unexpected interrupt, INT_BIT_DMA_RX_(%d) == 0",
+			    rx->channel_number);
+	}
+	if (enable_flag) {
+		/* enable isr */
+		lan743x_csr_write(adapter, INT_EN_SET,
+				  INT_BIT_DMA_RX_(rx->channel_number));
+	}
+}
+
+#define RX_PROCESS_RESULT_NOTHING_TO_DO     (0)
+#define RX_PROCESS_RESULT_PACKET_RECEIVED   (1)
+#define RX_PROCESS_RESULT_PACKET_DROPPED    (2)
+static int lan743x_rx_process_packet(struct lan743x_rx *rx)
+{
+	int result = RX_PROCESS_RESULT_NOTHING_TO_DO;
+	int first_index = -1;
+	int last_index = -1;
+	int extension_index = -1;
+	int current_head_index = -1;
+	struct lan743x_rx_descriptor *descriptor;
+	struct lan743x_rx_buffer_info *buffer_info;
+	struct lan743x_adapter *adapter = rx->adapter;
+	struct skb_shared_hwtstamps *hwtstamps = NULL;
+
+	current_head_index = *rx->head_cpu_ptr;
+	if ((current_head_index < 0) || (current_head_index >= rx->ring_size)) {
+		NETIF_ERROR(adapter, drv, adapter->netdev,
+			    "out of range, current_head_index = %d",
+			    current_head_index);
+		goto done;
+	}
+	if ((rx->last_head < 0) || (rx->last_head >= rx->ring_size)) {
+		NETIF_ERROR(adapter, drv, adapter->netdev,
+			    "out of range, last_head = %d",
+			    rx->last_head);
+		goto done;
+	}
+	if (rx->last_head != current_head_index) {
+		descriptor = &rx->ring_cpu_ptr[rx->last_head];
+		if (descriptor->data0 & RX_DESC_DATA0_OWN_) {
+			NETIF_ERROR(adapter, drv, adapter->netdev,
+				    "Head index updated, but descriptor still owned by DMAC (1)");
+			goto done;
+		}
+		if (!(descriptor->data0 & RX_DESC_DATA0_FS_)) {
+			NETIF_ERROR(adapter, drv, adapter->netdev,
+				    "first segment missing");
+			goto done;
+		}
+
+		first_index = rx->last_head;
+		if (descriptor->data0 & RX_DESC_DATA0_LS_) {
+			last_index = rx->last_head;
+		} else {
+			int index;
+
+			if (descriptor->data0 & RX_DESC_DATA0_EXT_) {
+				NETIF_ERROR(adapter, drv, adapter->netdev,
+					    "Extension bit set, not expected (1)");
+			}
+			index = lan743x_rx_next_index(rx, first_index);
+			while (index != current_head_index) {
+				descriptor = &rx->ring_cpu_ptr[index];
+				if (descriptor->data0 & RX_DESC_DATA0_OWN_) {
+					NETIF_ERROR(adapter, drv,
+						    adapter->netdev,
+						    "Head index updated, but descriptor still owned by DMAC (2)");
+					goto done;
+				}
+				if (descriptor->data0 & RX_DESC_DATA0_FS_) {
+					NETIF_ERROR(adapter, drv,
+						    adapter->netdev,
+						    "First Segment set, not expected");
+				}
+				if (descriptor->data0 & RX_DESC_DATA0_LS_) {
+					last_index = index;
+					break;
+				} else if (descriptor->data0 &
+					   RX_DESC_DATA0_EXT_) {
+					NETIF_ERROR(adapter, drv,
+						    adapter->netdev,
+						    "Extension bit set, not expected (2)");
+				}
+				index = lan743x_rx_next_index(rx, index);
+			}
+		}
+		if (last_index >= 0) {
+			descriptor = &rx->ring_cpu_ptr[last_index];
+			if (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 (descriptor->data0 &
+					    RX_DESC_DATA0_OWN_) {
+						NETIF_ERROR(adapter, drv,
+							    adapter->netdev,
+							    "Head index updated, but descriptor still owned by DMAC (3)");
+						goto done;
+					}
+					if (descriptor->data0 &
+					    RX_DESC_DATA0_EXT_) {
+						extension_index = index;
+					} else {
+						NETIF_ERROR(adapter, drv,
+							    adapter->netdev,
+							    "Expected extension after last segment");
+						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)) {
+		struct sk_buff *skb = NULL;
+		u32 ts_sec = 0;
+		u32 ts_nsec = 0;
+		int real_last_index = last_index;
+		/* packet is available */
+		if (first_index == last_index) {
+			/* single buffer packet */
+			int packet_length;
+
+			buffer_info = &rx->buffer_info[first_index];
+			NETIF_ASSERT(adapter, drv, adapter->netdev,
+				     buffer_info->skb);
+			skb = buffer_info->skb;
+			descriptor = &rx->ring_cpu_ptr[first_index];
+
+			/* unmap from dma */
+			if (buffer_info->dma_ptr) {
+				dma_unmap_single(&rx->adapter->pci.pdev->dev,
+						 buffer_info->dma_ptr,
+						 buffer_info->buffer_length,
+						 DMA_FROM_DEVICE);
+				buffer_info->dma_ptr = 0;
+				buffer_info->buffer_length = 0;
+			} else {
+				NETIF_WARNING(adapter, drv, adapter->netdev,
+					      "No DMA ptr found");
+			}
+			buffer_info->skb = NULL;
+
+			packet_length =	RX_DESC_DATA0_FRAME_LENGTH_GET_(
+					descriptor->data0);
+			NETIF_ASSERT(adapter, drv, adapter->netdev,
+				     sizeof(*skb->data) == 1);
+			skb_put(skb, packet_length - 4);
+			skb->protocol = eth_type_trans(skb,
+						       rx->adapter->netdev);
+
+			lan743x_rx_allocate_ring_element(rx, first_index);
+		} else {
+			int index = first_index;
+			/* multi buffer packet */
+			NETIF_ERROR(adapter, drv, adapter->netdev,
+				    "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_release_ring_element(rx,
+									index);
+					lan743x_rx_allocate_ring_element(rx,
+									 index);
+					index = lan743x_rx_next_index(rx,
+								      index);
+				}
+			} else {
+				while ((index >= first_index) ||
+				       (index <= last_index)) {
+					lan743x_rx_release_ring_element(rx,
+									index);
+					lan743x_rx_allocate_ring_element(rx,
+									 index);
+					index = lan743x_rx_next_index(rx,
+								      index);
+				}
+			}
+		}
+		if (extension_index >= 0) {
+			NETIF_ASSERT(adapter, drv, adapter->netdev,
+				     extension_index ==
+				     lan743x_rx_next_index(rx, last_index));
+			descriptor = &rx->ring_cpu_ptr[extension_index];
+			buffer_info = &rx->buffer_info[extension_index];
+			NETIF_ASSERT(adapter, drv, adapter->netdev,
+				     !(descriptor->data0 &
+				     (RX_DESC_DATA0_FS_ |
+				     RX_DESC_DATA0_LS_ |
+				     RX_DESC_DATA0_OWN_)));
+			NETIF_ASSERT(adapter, drv, adapter->netdev,
+				     descriptor->data0 &
+				     RX_DESC_DATA0_EXT_);
+			ts_sec = descriptor->data1;
+			ts_nsec = (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);
+		} else {
+			NETIF_ERROR(adapter, drv, adapter->netdev,
+				    "hwtstamps == NULL");
+		}
+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 */
+		lan743x_csr_write(adapter, RX_TAIL(rx->channel_number),
+				  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)
+{
+	int count;
+	bool finished = false;
+	struct lan743x_rx *rx = container_of(napi,
+		struct lan743x_rx, napi);
+	struct lan743x_adapter *adapter = rx->adapter;
+
+	if (weight < 0)
+		finished = true;
+
+	count = 0;
+	while (count < weight) {
+		int rx_process_result = -1;
+
+		/* clear int status bit before reading packet */
+		lan743x_csr_write(adapter, DMAC_INT_STS,
+				  DMAC_INT_BIT_RXFRM_(rx->channel_number));
+		lan743x_csr_read(adapter, DMAC_INT_STS);
+
+		rx_process_result = lan743x_rx_process_packet(rx);
+		if (rx_process_result == RX_PROCESS_RESULT_PACKET_RECEIVED) {
+			count++;
+		} else if (rx_process_result ==
+			RX_PROCESS_RESULT_NOTHING_TO_DO) {
+			finished = true;
+			break;
+		} else if (rx_process_result ==
+			RX_PROCESS_RESULT_PACKET_DROPPED) {
+			continue;
+		} else {
+			NETIF_ERROR(adapter, drv, adapter->netdev,
+				    "Unknown rx_process_result == %d",
+				    rx_process_result);
+		}
+	}
+
+	adapter->netdev->stats.rx_packets += count;
+
+	if (!finished) {
+		NETIF_ASSERT(adapter, drv, adapter->netdev, count == weight);
+		return count;
+	}
+
+	napi_complete_done(napi, count);
+
+	lan743x_csr_write(adapter, INT_EN_SET,
+			  INT_BIT_DMA_RX_(rx->channel_number));
+	lan743x_csr_read(adapter, INT_STS);
+
+	return 0;
+}
+
+static int lan743x_rx_ring_init(struct lan743x_rx *rx)
+{
+	int ret = -ENOMEM;
+	int descriptor_spacing = 0;
+	int element_index = 0;
+	size_t ring_allocation_size = 0;
+	dma_addr_t dma_ptr = 0;
+	void *cpu_ptr = NULL;
+	struct lan743x_adapter *adapter = rx->adapter;
+
+	NETIF_ASSERT(adapter, drv, adapter->netdev, rx->adapter);
+	NETIF_ASSERT(adapter, drv, adapter->netdev, !rx->ring_size);
+	NETIF_ASSERT(adapter, drv, adapter->netdev, !rx->ring_allocation_size);
+	NETIF_ASSERT(adapter, drv, adapter->netdev, !rx->ring_cpu_ptr);
+	NETIF_ASSERT(adapter, drv, adapter->netdev, !rx->ring_dma_ptr);
+	NETIF_ASSERT(adapter, drv, adapter->netdev, !rx->buffer_info);
+	NETIF_ASSERT(adapter, drv, adapter->netdev, !rx->head_cpu_ptr);
+	NETIF_ASSERT(adapter, drv, adapter->netdev, !rx->head_dma_ptr);
+
+	descriptor_spacing = lan743x_dmac_get_descriptor_spacing(rx->adapter);
+	if (sizeof(struct lan743x_rx_descriptor) != descriptor_spacing) {
+		NETIF_ERROR(adapter, drv, adapter->netdev,
+			    "sizeof(struct lan743x_rx_descriptor) != descriptor_spacing");
+		ret = -EPERM;
+		goto cleanup;
+	}
+
+	rx->ring_size = LAN743X_RX_RING_SIZE;
+
+	if (rx->ring_size <= 1) {
+		NETIF_ERROR(adapter, drv, adapter->netdev,
+			    "rx_channel = %d, ring_size = %d",
+			    rx->channel_number, rx->ring_size);
+		ret = -EINVAL;
+		goto cleanup;
+	}
+
+	if ((rx->ring_size) & (~RX_CFG_B_RX_RING_LEN_MASK_)) {
+		NETIF_ERROR(adapter, drv, adapter->netdev,
+			    "ring size is too large, rx_channel = %d",
+			    rx->channel_number);
+		ret = -EINVAL;
+		goto cleanup;
+	}
+
+	ring_allocation_size = ALIGN(rx->ring_size * descriptor_spacing,
+				     PAGE_SIZE);
+
+	dma_ptr = 0;
+	cpu_ptr = pci_zalloc_consistent(rx->adapter->pci.pdev,
+					ring_allocation_size, &dma_ptr);
+	if (!cpu_ptr) {
+		NETIF_ERROR(adapter, drv, adapter->netdev,
+			    "Failed to allocate rx ring, channel = %d",
+			    rx->channel_number);
+		ret = -ENOMEM;
+		goto cleanup;
+	}
+	NETIF_ASSERT(adapter, drv, adapter->netdev, dma_ptr);
+	rx->ring_allocation_size = ring_allocation_size;
+	rx->ring_cpu_ptr = (struct lan743x_rx_descriptor *)cpu_ptr;
+	rx->ring_dma_ptr = dma_ptr;
+	if ((rx->ring_dma_ptr) & 0x3) {
+		NETIF_ERROR(adapter, drv, adapter->netdev,
+			    "dma ring base is not DWORD aligned, channel = %d",
+			    rx->channel_number);
+		ret = -ENOMEM;
+		goto cleanup;
+	}
+
+	cpu_ptr = kzalloc(rx->ring_size * sizeof(*rx->buffer_info),
+			  GFP_KERNEL);
+	if (!cpu_ptr) {
+		NETIF_ERROR(adapter, drv, adapter->netdev,
+			    "Failed to allocate buffer info, channel = %d",
+			    rx->channel_number);
+		ret = -ENOMEM;
+		goto cleanup;
+	}
+	rx->buffer_info = (struct lan743x_rx_buffer_info *)cpu_ptr;
+
+	dma_ptr = 0;
+	cpu_ptr = pci_zalloc_consistent(
+		rx->adapter->pci.pdev,
+		sizeof(*rx->head_cpu_ptr), &dma_ptr);
+	if (!cpu_ptr) {
+		NETIF_ERROR(adapter, drv, adapter->netdev,
+			    "Failed to allocate head pointer, channel = %d",
+			    rx->channel_number);
+		ret = -ENOMEM;
+		goto cleanup;
+	}
+	NETIF_ASSERT(adapter, drv, adapter->netdev, dma_ptr);
+	rx->head_cpu_ptr = cpu_ptr;
+	rx->head_dma_ptr = dma_ptr;
+	if ((rx->head_dma_ptr) & 0x3) {
+		NETIF_ERROR(adapter, drv, adapter->netdev,
+			    "head write back pointer is not DWORD aligned, channel = %d",
+			    rx->channel_number);
+		ret = -ENOMEM;
+		goto cleanup;
+	}
+	rx->last_head = 0;
+
+	for (element_index = 0; element_index < rx->ring_size;
+	     element_index++) {
+		ret = lan743x_rx_allocate_ring_element(rx, element_index);
+		if (ret) {
+			NETIF_ERROR(adapter, drv, adapter->netdev,
+				    "failed to allocate rx ring element, element_index = %d",
+				    element_index);
+			goto cleanup;
+		}
+	}
+	ret = 0;
+cleanup:
+	if (ret)
+		lan743x_rx_ring_cleanup(rx);
+
+	return ret;
+}
+
+static void lan743x_rx_ring_cleanup(struct lan743x_rx *rx)
+{
+	struct lan743x_adapter *adapter = rx->adapter;
+
+	NETIF_ASSERT(adapter, drv, adapter->netdev, rx->adapter);
+
+	if ((rx->buffer_info) && (rx->ring_cpu_ptr)) {
+		int element_index;
+
+		for (element_index = 0; element_index < rx->ring_size;
+		     element_index++)
+			lan743x_rx_release_ring_element(rx, element_index);
+	}
+
+	if (rx->head_cpu_ptr) {
+		pci_free_consistent(rx->adapter->pci.pdev,
+				    sizeof(*rx->head_cpu_ptr),
+				    (void *)(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) {
+		pci_free_consistent(rx->adapter->pci.pdev,
+				    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_init(struct lan743x_rx *rx,
+			   struct lan743x_adapter *adapter, int rx_channel)
+{
+	int ret = -ENODEV;
+
+	memset(rx, 0, sizeof(*rx));
+	NETIF_ASSERT(adapter, probe, adapter->netdev,
+		     (rx_channel >= 0) &&
+		     (rx_channel < LAN743X_NUMBER_OF_RX_CHANNELS));
+
+	rx->adapter = adapter;
+	rx->channel_number = -1;
+
+	ret = lan743x_dmac_reserve_rx_channel(adapter, rx_channel);
+	if (ret) {
+		NETIF_ERROR(adapter, probe, adapter->netdev,
+			    "Failed to reserve rx channel %d",
+			    rx_channel);
+		goto cleanup;
+	}
+	rx->channel_number = rx_channel;
+
+	ret = 0;
+
+cleanup:
+	if (ret)
+		lan743x_rx_cleanup(rx);
+	return ret;
+}
+
+static void lan743x_rx_cleanup(struct lan743x_rx *rx)
+{
+	struct lan743x_adapter *adapter = rx->adapter;
+
+	if (rx->channel_number >= 0) {
+		lan743x_dmac_release_rx_channel(adapter, rx->channel_number);
+		rx->channel_number = -1;
+	}
+
+	memset(rx, 0, sizeof(*rx));
+}
+
+static int lan743x_rx_open(struct lan743x_rx *rx)
+{
+	int ret = -ENODEV;
+	struct lan743x_adapter *adapter = rx->adapter;
+	u32 data = 0;
+
+	NETIF_ASSERT(adapter, ifup, adapter->netdev,
+		     (rx->channel_number >= 0) &&
+		     (rx->channel_number < LAN743X_NUMBER_OF_RX_CHANNELS));
+
+	ret = lan743x_rx_ring_init(rx);
+	if (ret) {
+		NETIF_ERROR(adapter, ifup, adapter->netdev,
+			    "Rx channel %d, ring initialization failed",
+			    rx->channel_number);
+		goto cleanup;
+	}
+	rx->flags |= RX_FLAG_RING_ALLOCATED;
+
+	NETIF_ASSERT(adapter, ifup, adapter->netdev, rx->ring_size >= 1);
+
+	netif_napi_add(rx->adapter->netdev,
+		       &rx->napi, lan743x_rx_napi_poll,
+		       rx->ring_size - 1);
+	rx->flags |= RX_FLAG_NAPI_ADDED;
+
+	ret = lan743x_dmac_rx_reset(adapter, rx->channel_number);
+	if (ret) {
+		NETIF_ERROR(adapter, ifup, adapter->netdev,
+			    "Failed to reset rx dmac, rx_channel = %d",
+			    rx->channel_number);
+		goto cleanup;
+	}
+
+	/* set ring base address */
+	NETIF_ASSERT(adapter, ifup, adapter->netdev,
+		     !((rx->ring_dma_ptr) & 0x3));
+	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 */
+	NETIF_ASSERT(adapter, ifup, adapter->netdev,
+		     !((rx->head_dma_ptr) & 0x3));
+	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));
+
+	/* set RX_CFG_A */
+	lan743x_csr_write(adapter,
+			  RX_CFG_A(rx->channel_number),
+			  RX_CFG_A_RX_HP_WB_EN_);
+
+	/* 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_;
+	lan743x_csr_write(adapter, RX_CFG_B(rx->channel_number), data);
+
+	lan743x_csr_write(adapter, RX_TAIL(rx->channel_number),
+			  ((u32)(rx->ring_size - 1)));
+	rx->last_head = lan743x_csr_read(adapter, RX_HEAD(rx->channel_number));
+	if (rx->last_head) {
+		NETIF_ERROR(adapter, ifup, adapter->netdev, "last_head != 0");
+		ret = -EIO;
+		goto cleanup;
+	}
+
+	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));
+	rx->flags |= RX_FLAG_ISR_ENABLED;
+
+	ret = lan743x_dmac_rx_start(adapter, rx->channel_number);
+	if (ret) {
+		NETIF_ERROR(adapter, ifup, adapter->netdev,
+			    "Failed to start rx channel %d, first",
+			    rx->channel_number);
+		goto cleanup;
+	}
+	rx->flags |= RX_FLAG_DMAC_STARTED;
+
+	/* initialize fifo */
+	NETIF_ASSERT(adapter, ifup, adapter->netdev,
+		     !(rx->flags & RX_FLAG_FIFO_ENABLED));
+	ret = lan743x_fct_rx_reset(adapter, rx->channel_number);
+	if (ret) {
+		NETIF_ERROR(adapter, ifup, adapter->netdev,
+			    "Failed to reset rx fifo, rx_channel = %d",
+			    rx->channel_number);
+		goto cleanup;
+	}
+
+	/* enable fifo */
+	ret = lan743x_fct_rx_enable(adapter, rx->channel_number);
+	if (ret) {
+		NETIF_ERROR(adapter, ifup, adapter->netdev,
+			    "Failed to enable rx fifo, rx_channel = %d",
+			    rx->channel_number);
+		goto cleanup;
+	}
+	rx->flags |= RX_FLAG_FIFO_ENABLED;
+
+	/* enable mac */
+	ret = lan743x_mac_rx_enable(adapter, rx->channel_number);
+	if (ret) {
+		NETIF_ERROR(adapter, ifup, adapter->netdev,
+			    "failed to enable mac, rx_channel = %d",
+			    rx->channel_number);
+		goto cleanup;
+	}
+	rx->flags |= RX_FLAG_MAC_ENABLED;
+
+	ret = 0;
+cleanup:
+	if (ret)
+		lan743x_rx_close(rx);
+	return ret;
+}
+
+static void lan743x_rx_close(struct lan743x_rx *rx)
+{
+	struct lan743x_adapter *adapter = rx->adapter;
+
+	if (rx->flags & RX_FLAG_MAC_ENABLED) {
+		lan743x_mac_rx_disable(adapter, rx->channel_number);
+		rx->flags &= ~RX_FLAG_MAC_ENABLED;
+	}
+
+	if (rx->flags & RX_FLAG_FIFO_ENABLED) {
+		lan743x_fct_rx_disable(adapter, rx->channel_number);
+		rx->flags &= ~RX_FLAG_FIFO_ENABLED;
+	}
+
+	if (rx->flags & RX_FLAG_DMAC_STARTED) {
+		lan743x_dmac_rx_stop(adapter, rx->channel_number);
+		rx->flags &= ~RX_FLAG_DMAC_STARTED;
+	}
+
+	if (rx->flags & RX_FLAG_ISR_ENABLED) {
+		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);
+		rx->flags &= ~RX_FLAG_ISR_ENABLED;
+	}
+
+	if (rx->flags & RX_FLAG_NAPI_ADDED) {
+		netif_napi_del(&rx->napi);
+		rx->flags &= ~RX_FLAG_NAPI_ADDED;
+	}
+
+	if (rx->flags & RX_FLAG_RING_ALLOCATED) {
+		lan743x_rx_ring_cleanup(rx);
+		rx->flags &= ~RX_FLAG_RING_ALLOCATED;
+	}
+}
+
+/* NETDEV */
+
+static int lan743x_netdev_close(struct net_device *netdev)
+{
+	struct lan743x_adapter *adapter = netdev_priv(netdev);
+
+	NETIF_INFO(adapter, ifdown, adapter->netdev, "LAN743x_closing");
+
+	if (adapter->open_flags & LAN743X_COMPONENT_FLAG_TX(0)) {
+		lan743x_tx_close(&adapter->tx[0]);
+		adapter->open_flags &= ~LAN743X_COMPONENT_FLAG_TX(0);
+	}
+	if (adapter->open_flags & LAN743X_COMPONENT_FLAG_RX(0)) {
+		lan743x_rx_close(&adapter->rx[0]);
+		adapter->open_flags &= ~LAN743X_COMPONENT_FLAG_RX(0);
+	}
+	if (adapter->open_flags & LAN743X_COMPONENT_FLAG_DMAC) {
+		lan743x_dmac_close(adapter);
+		adapter->open_flags &= ~LAN743X_COMPONENT_FLAG_DMAC;
+	}
+	if (adapter->open_flags & LAN743X_COMPONENT_FLAG_FCT) {
+		lan743x_fct_close(adapter);
+		adapter->open_flags &= ~LAN743X_COMPONENT_FLAG_FCT;
+	}
+	if (adapter->open_flags & LAN743X_COMPONENT_FLAG_RFE) {
+		lan743x_rfe_close(adapter);
+		adapter->open_flags &= ~LAN743X_COMPONENT_FLAG_RFE;
+	}
+	if (adapter->open_flags & LAN743X_COMPONENT_FLAG_PTP) {
+		lan743x_ptp_close(adapter);
+		adapter->open_flags &= ~LAN743X_COMPONENT_FLAG_PTP;
+	}
+	if (adapter->open_flags & LAN743X_COMPONENT_FLAG_PHY) {
+		lan743x_phy_close(adapter);
+		adapter->open_flags &= ~LAN743X_COMPONENT_FLAG_PHY;
+	}
+	if (adapter->open_flags & LAN743X_COMPONENT_FLAG_MAC) {
+		lan743x_mac_close(adapter);
+		adapter->open_flags &= ~LAN743X_COMPONENT_FLAG_MAC;
+	}
+	if (adapter->open_flags & LAN743X_COMPONENT_FLAG_GPIO) {
+		lan743x_gpio_close(adapter);
+		adapter->open_flags &= ~LAN743X_COMPONENT_FLAG_GPIO;
+	}
+	if (adapter->open_flags & LAN743X_COMPONENT_FLAG_DP) {
+		lan743x_dp_close(adapter);
+		adapter->open_flags &= ~LAN743X_COMPONENT_FLAG_DP;
+	}
+	if (adapter->open_flags & LAN743X_COMPONENT_FLAG_INTR) {
+		lan743x_intr_close(adapter);
+		adapter->open_flags &= ~LAN743X_COMPONENT_FLAG_INTR;
+	}
+	return 0;
+}
+
+static int lan743x_netdev_open(struct net_device *netdev)
+{
+	struct lan743x_adapter *adapter = netdev_priv(netdev);
+	int ret;
+
+	NETIF_ASSERT(adapter, ifup, adapter->netdev, !adapter->open_flags);
+
+	ret = lan743x_intr_open(adapter);
+	if (ret) {
+		NETIF_ERROR(adapter, ifup, adapter->netdev,
+			    "intr opened failed");
+		goto clean_up;
+	}
+	adapter->open_flags |= LAN743X_COMPONENT_FLAG_INTR;
+
+	ret = lan743x_dp_open(adapter);
+	if (ret) {
+		NETIF_ERROR(adapter, ifup, adapter->netdev, "dp_open failed");
+		goto clean_up;
+	}
+	adapter->open_flags |= LAN743X_COMPONENT_FLAG_DP;
+
+	ret = lan743x_gpio_open(adapter);
+	if (ret) {
+		NETIF_ERROR(adapter, ifup, adapter->netdev,
+			    "gpio_open failed");
+		goto clean_up;
+	}
+	adapter->open_flags |= LAN743X_COMPONENT_FLAG_GPIO;
+
+	ret = lan743x_mac_open(adapter);
+	if (ret) {
+		NETIF_ERROR(adapter, drv, adapter->netdev, "mac_open failed");
+		goto clean_up;
+	}
+	adapter->open_flags |= LAN743X_COMPONENT_FLAG_MAC;
+
+	ret = lan743x_phy_open(adapter);
+	if (ret) {
+		NETIF_ERROR(adapter, ifup, adapter->netdev, "phy_open failed");
+		goto clean_up;
+	}
+	adapter->open_flags |= LAN743X_COMPONENT_FLAG_PHY;
+
+	ret = lan743x_ptp_open(adapter);
+	if (ret) {
+		NETIF_ERROR(adapter, ifup, adapter->netdev, "ptp_open failed");
+		goto clean_up;
+	}
+	adapter->open_flags |= LAN743X_COMPONENT_FLAG_PTP;
+
+	ret = lan743x_rfe_open(adapter);
+	if (ret) {
+		NETIF_ERROR(adapter, ifup, adapter->netdev, "rfe_open failed");
+		goto clean_up;
+	}
+	adapter->open_flags |= LAN743X_COMPONENT_FLAG_RFE;
+
+	ret = lan743x_fct_open(adapter);
+	if (ret) {
+		NETIF_ERROR(adapter, ifup, adapter->netdev, "fct_open failed");
+		goto clean_up;
+	}
+	adapter->open_flags |= LAN743X_COMPONENT_FLAG_FCT;
+
+	ret = lan743x_dmac_open(adapter);
+	if (ret) {
+		NETIF_ERROR(adapter, ifup, adapter->netdev,
+			    "dmac_open failed");
+		goto clean_up;
+	}
+	adapter->open_flags |= LAN743X_COMPONENT_FLAG_DMAC;
+
+	ret = lan743x_rx_open(&adapter->rx[0]);
+	if (ret) {
+		NETIF_ERROR(adapter, ifup, adapter->netdev,
+			    "rx[0] open failed");
+		goto clean_up;
+	}
+	adapter->open_flags |= LAN743X_COMPONENT_FLAG_RX(0);
+
+	ret = lan743x_tx_open(&adapter->tx[0]);
+	if (ret) {
+		NETIF_ERROR(adapter, ifup, adapter->netdev,
+			    "tx[0] open failed");
+		goto clean_up;
+	}
+	adapter->open_flags |= LAN743X_COMPONENT_FLAG_TX(0);
+
+	NETIF_INFO(adapter, ifup, adapter->netdev,
+		   "LAN743x opened successfully");
+
+clean_up:
+	if (ret) {
+		NETIF_WARNING(adapter, ifup, adapter->netdev,
+			      "Error opening LAN743x, performing cleanup");
+		lan743x_netdev_close(netdev);
+	}
+	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);
+
+	netdev->stats.tx_packets++;
+	return lan743x_tx_xmit_frame(&adapter->tx[0], skb);
+}
+
+static int lan743x_netdev_ioctl(
+	struct net_device *netdev, struct ifreq *ifr, int cmd)
+{
+	struct lan743x_adapter *adapter = netdev_priv(netdev);
+	struct hwtstamp_config config;
+	int ret = 0;
+	int index;
+
+	if (!netif_running(netdev))
+		return -EINVAL;
+	if (cmd != SIOCSHWTSTAMP) {
+		int ret = phy_mii_ioctl(netdev->phydev, ifr, cmd);
+
+		if (ret == -EINVAL)
+			NETIF_ERROR(adapter, drv, adapter->netdev,
+				    "operation not supported");
+		return ret;
+	}
+	if (!ifr) {
+		NETIF_ERROR(adapter, drv, adapter->netdev,
+			    "SIOCSHWTSTAMP, ifr == NULL");
+		return -EINVAL;
+	}
+
+	if (copy_from_user(&config, ifr->ifr_data, sizeof(config)))
+		return -EFAULT;
+
+	if (config.flags) {
+		NETIF_WARNING(adapter, drv, adapter->netdev,
+			      "ignoring hwtstamp_config.flags == 0x%08X, expected 0",
+			      config.flags);
+	}
+
+	switch (config.tx_type) {
+	case HWTSTAMP_TX_OFF:
+		for (index = 0; index < LAN743X_NUMBER_OF_TX_CHANNELS;
+		     index++)
+			lan743x_tx_set_timestamping_enable(&adapter->tx[index],
+							   false);
+		NETIF_INFO(adapter, drv, adapter->netdev,
+			   "  tx_type = HWTSTAMP_TX_OFF");
+		break;
+	case HWTSTAMP_TX_ON:
+		for (index = 0; index < LAN743X_NUMBER_OF_TX_CHANNELS;
+		     index++)
+			lan743x_tx_set_timestamping_enable(&adapter->tx[index],
+							   true);
+		NETIF_INFO(adapter, drv, adapter->netdev,
+			   "  tx_type = HWTSTAMP_TX_ON");
+		break;
+	default:
+		NETIF_INFO(adapter, drv, adapter->netdev,
+			   "  tx_type = %d, UNKNOWN", config.tx_type);
+		ret = -EINVAL;
+		break;
+	}
+	/* currently the driver timestamps all incoming packets
+	 * so no special setting is require
+	 */
+	switch (config.rx_filter) {
+	case HWTSTAMP_FILTER_NONE:
+		NETIF_INFO(adapter, drv, adapter->netdev,
+			   "  rx_filter = HWTSTAMP_FILTER_NONE");
+		break;
+	case HWTSTAMP_FILTER_ALL:
+		NETIF_INFO(adapter, drv, adapter->netdev,
+			   "  rx_filter = HWTSTAMP_FILTER_ALL");
+		break;
+	case HWTSTAMP_FILTER_SOME:
+		NETIF_INFO(adapter, drv, adapter->netdev,
+			   "  rx_filter = HWTSTAMP_FILTER_SOME");
+		break;
+	case HWTSTAMP_FILTER_PTP_V1_L4_EVENT:
+		NETIF_INFO(adapter, drv, adapter->netdev,
+			   "  rx_filter = HWTSTAMP_FILTER_PTP_V1_L4_EVENT");
+		break;
+	case HWTSTAMP_FILTER_PTP_V1_L4_SYNC:
+		NETIF_INFO(adapter, drv, adapter->netdev,
+			   "  rx_filter = HWTSTAMP_FILTER_PTP_V1_L4_SYNC");
+		break;
+	case HWTSTAMP_FILTER_PTP_V1_L4_DELAY_REQ:
+		NETIF_INFO(adapter, drv, adapter->netdev,
+			   "  rx_filter = HWTSTAMP_FILTER_PTP_V1_L4_DELAY_REQ");
+		break;
+	case HWTSTAMP_FILTER_PTP_V2_L4_EVENT:
+		NETIF_INFO(adapter, drv, adapter->netdev,
+			   "  rx_filter = HWTSTAMP_FILTER_PTP_V2_L4_EVENT");
+		break;
+	case HWTSTAMP_FILTER_PTP_V2_L4_SYNC:
+		NETIF_INFO(adapter, drv, adapter->netdev,
+			   "  rx_filter = HWTSTAMP_FILTER_PTP_V2_L4_SYNC");
+		break;
+	case HWTSTAMP_FILTER_PTP_V2_L4_DELAY_REQ:
+		NETIF_INFO(adapter, drv, adapter->netdev,
+			   "  rx_filter = HWTSTAMP_FILTER_PTP_V2_L4_DELAY_REQ");
+		break;
+	case HWTSTAMP_FILTER_PTP_V2_L2_EVENT:
+		NETIF_INFO(adapter, drv, adapter->netdev,
+			   "  rx_filter = HWTSTAMP_FILTER_PTP_V2_L2_EVENT");
+		break;
+	case HWTSTAMP_FILTER_PTP_V2_L2_SYNC:
+		NETIF_INFO(adapter, drv, adapter->netdev,
+			   "  rx_filter = HWTSTAMP_FILTER_PTP_V2_L2_SYNC");
+		break;
+	case HWTSTAMP_FILTER_PTP_V2_L2_DELAY_REQ:
+		NETIF_INFO(adapter, drv, adapter->netdev,
+			   "  rx_filter = HWTSTAMP_FILTER_PTP_V2_L2_DELAY_REQ");
+		break;
+	case HWTSTAMP_FILTER_PTP_V2_EVENT:
+		NETIF_INFO(adapter, drv, adapter->netdev,
+			   "  rx_filter = HWTSTAMP_FILTER_PTP_V2_EVENT");
+		break;
+	case HWTSTAMP_FILTER_PTP_V2_SYNC:
+		NETIF_INFO(adapter, drv, adapter->netdev,
+			   "  rx_filter = HWTSTAMP_FILTER_PTP_V2_SYNC");
+		break;
+	case HWTSTAMP_FILTER_PTP_V2_DELAY_REQ:
+		NETIF_INFO(adapter, drv, adapter->netdev,
+			   "  rx_filter = HWTSTAMP_FILTER_PTP_V2_DELAY_REQ");
+		break;
+	default:
+		NETIF_WARNING(adapter, drv, adapter->netdev,
+			      "  rx_filter = %d, UNKNOWN", config.rx_filter);
+		NETIF_WARNING(adapter, drv, adapter->netdev,
+			      "  assuming rx_filter = HWTSTAMP_FILTER_ALL");
+		/* treat this like HWTSTAMP_FILTER_ALL */
+		break;
+	}
+	if (!ret)
+		return copy_to_user(ifr->ifr_data, &config,
+				    sizeof(config)) ? -EFAULT : 0;
+	return ret;
+}
+
+static void lan743x_netdev_set_multicast(struct net_device *netdev)
+{
+	struct lan743x_adapter *adapter = netdev_priv(netdev);
+
+	NETIF_ASSERT(adapter, drv, adapter->netdev, netdev);
+	adapter = netdev_priv(netdev);
+	lan743x_rfe_set_multicast(adapter);
+}
+
+static int lan743x_netdev_change_mtu(struct net_device *netdev, int new_mtu)
+{
+	int ret = 0;
+	struct lan743x_adapter *adapter = netdev_priv(netdev);
+
+	NETIF_INFO(adapter, drv, adapter->netdev, "new_mtu = %d", new_mtu);
+	ret = lan743x_mac_set_mtu(adapter, new_mtu);
+	if (!ret)
+		netdev->mtu = new_mtu;
+	return ret;
+}
+
+static struct net_device_stats *lan743x_netdev_get_stats(struct net_device *nd)
+{
+	struct lan743x_adapter *adapter = NULL;
+
+	NETIF_ASSERT(adapter, drv, adapter->netdev, nd);
+	adapter = netdev_priv(nd);
+	return mac_get_stats(adapter);
+}
+
+static int lan743x_netdev_set_mac_address(struct net_device *netdev,
+					  void *addr)
+{
+	struct lan743x_adapter *adapter = NULL;
+	struct sockaddr *sock_addr = addr;
+
+	NETIF_ASSERT(adapter, drv, adapter->netdev, netdev);
+
+	if (netif_running(netdev))
+		return -EBUSY;
+
+	if (!is_valid_ether_addr(sock_addr->sa_data))
+		return -EADDRNOTAVAIL;
+
+	ether_addr_copy(netdev->dev_addr, sock_addr->sa_data);
+
+	adapter = netdev_priv(netdev);
+	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_stats		= lan743x_netdev_get_stats,
+	.ndo_set_mac_address	= lan743x_netdev_set_mac_address,
+};
+
+/* ETHTOOL */
+static const char lan743x_gstrings[][ETH_GSTRING_LEN] = {
+	"RX FCS Errors",
+	"RX Alignment Errors",
+	"Rx Fragment Errors",
+	"RX Jabber Errors",
+	"RX Undersize Frame Errors",
+	"RX Oversize Frame Errors",
+	"RX Dropped Frames",
+	"RX Unicast Byte Count",
+	"RX Broadcast Byte Count",
+	"RX Multicast Byte Count",
+	"RX Unicast Frames",
+	"RX Broadcast Frames",
+	"RX Multicast Frames",
+	"RX Pause Frames",
+	"RX 64 Byte Frames",
+	"RX 65 - 127 Byte Frames",
+	"RX 128 - 255 Byte Frames",
+	"RX 256 - 511 Bytes Frames",
+	"RX 512 - 1023 Byte Frames",
+	"RX 1024 - 1518 Byte Frames",
+	"RX Greater 1518 Byte Frames",
+	"RX Total Frames",
+	"EEE RX LPI Transitions",
+	"EEE RX LPI Time",
+	"RX Counter Rollover Status",
+	"TX FCS Errors",
+	"TX Excess Deferral Errors",
+	"TX Carrier Errors",
+	"TX Bad Byte Count",
+	"TX Single Collisions",
+	"TX Multiple Collisions",
+	"TX Excessive Collision",
+	"TX Late Collisions",
+	"TX Unicast Byte Count",
+	"TX Broadcast Byte Count",
+	"TX Multicast Byte Count",
+	"TX Unicast Frames",
+	"TX Broadcast Frames",
+	"TX Multicast Frames",
+	"TX Pause Frames",
+	"TX 64 Byte Frames",
+	"TX 65 - 127 Byte Frames",
+	"TX 128 - 255 Byte Frames",
+	"TX 256 - 511 Bytes Frames",
+	"TX 512 - 1023 Byte Frames",
+	"TX 1024 - 1518 Byte Frames",
+	"TX Greater 1518 Byte Frames",
+	"TX Total Frames",
+	"EEE TX LPI Transitions",
+	"EEE TX LPI Time",
+	"TX Counter Rollover Status",
+};
+
+static const u32 lan743x_stat_addr[] = {
+	STAT_RX_FCS_ERRORS,
+	STAT_RX_ALIGNMENT_ERRORS,
+	STAT_RX_FRAGMENT_ERRORS,
+	STAT_RX_JABBER_ERRORS,
+	STAT_RX_UNDERSIZE_FRAME_ERRORS,
+	STAT_RX_OVERSIZE_FRAME_ERRORS,
+	STAT_RX_DROPPED_FRAMES,
+	STAT_RX_UNICAST_BYTE_COUNT,
+	STAT_RX_BROADCAST_BYTE_COUNT,
+	STAT_RX_MULTICAST_BYTE_COUNT,
+	STAT_RX_UNICAST_FRAMES,
+	STAT_RX_BROADCAST_FRAMES,
+	STAT_RX_MULTICAST_FRAMES,
+	STAT_RX_PAUSE_FRAMES,
+	STAT_RX_64_BYTE_FRAMES,
+	STAT_RX_65_127_BYTE_FRAMES,
+	STAT_RX_128_255_BYTE_FRAMES,
+	STAT_RX_256_511_BYTES_FRAMES,
+	STAT_RX_512_1023_BYTE_FRAMES,
+	STAT_RX_1024_1518_BYTE_FRAMES,
+	STAT_RX_GREATER_1518_BYTE_FRAMES,
+	STAT_RX_TOTAL_FRAMES,
+	STAT_EEE_RX_LPI_TRANSITIONS,
+	STAT_EEE_RX_LPI_TIME,
+	STAT_RX_COUNTER_ROLLOVER_STATUS,
+	STAT_TX_FCS_ERRORS,
+	STAT_TX_EXCESS_DEFERRAL_ERRORS,
+	STAT_TX_CARRIER_ERRORS,
+	STAT_TX_BAD_BYTE_COUNT,
+	STAT_TX_SINGLE_COLLISIONS,
+	STAT_TX_MULTIPLE_COLLISIONS,
+	STAT_TX_EXCESSIVE_COLLISION,
+	STAT_TX_LATE_COLLISIONS,
+	STAT_TX_UNICAST_BYTE_COUNT,
+	STAT_TX_BROADCAST_BYTE_COUNT,
+	STAT_TX_MULTICAST_BYTE_COUNT,
+	STAT_TX_UNICAST_FRAMES,
+	STAT_TX_BROADCAST_FRAMES,
+	STAT_TX_MULTICAST_FRAMES,
+	STAT_TX_PAUSE_FRAMES,
+	STAT_TX_64_BYTE_FRAMES,
+	STAT_TX_65_127_BYTE_FRAMES,
+	STAT_TX_128_255_BYTE_FRAMES,
+	STAT_TX_256_511_BYTES_FRAMES,
+	STAT_TX_512_1023_BYTE_FRAMES,
+	STAT_TX_1024_1518_BYTE_FRAMES,
+	STAT_TX_GREATER_1518_BYTE_FRAMES,
+	STAT_TX_TOTAL_FRAMES,
+	STAT_EEE_TX_LPI_TRANSITIONS,
+	STAT_EEE_TX_LPI_TIME,
+	STAT_TX_COUNTER_ROLLOVER_STATUS
+};
+
+static void lan743x_ethtool_get_drvinfo(struct net_device *netdev,
+					struct ethtool_drvinfo *info)
+{
+	struct lan743x_adapter *adapter = netdev_priv(netdev);
+
+	strlcpy(info->driver, DRIVER_NAME, sizeof(info->driver));
+	strlcpy(info->version, DRIVER_VERSION, sizeof(info->version));
+	strlcpy(info->bus_info,
+		pci_name(adapter->pci.pdev), sizeof(info->bus_info));
+}
+
+static u32 lan743x_ethtool_get_msglevel(struct net_device *netdev)
+{
+	struct lan743x_adapter *adapter = netdev_priv(netdev);
+
+	NETIF_INFO(adapter, drv, adapter->netdev,
+		   "get_msglevel: msg_enable == 0x%08X",
+		   adapter->msg_enable);
+	return adapter->msg_enable;
+}
+
+static void lan743x_ethtool_set_msglevel(struct net_device *netdev,
+					 u32 msglevel)
+{
+	struct lan743x_adapter *adapter = netdev_priv(netdev);
+
+	adapter->msg_enable = msglevel;
+	NETIF_INFO(adapter, drv, adapter->netdev,
+		   "set_msglevel: msg_enable == 0x%08X",
+		   adapter->msg_enable);
+}
+
+static int lan743x_ethtool_get_eeprom_len(struct net_device *netdev)
+{
+	return 0;
+}
+
+static void lan743x_ethtool_get_strings(struct net_device *netdev,
+					u32 stringset, u8 *data)
+{
+	switch (stringset) {
+	case ETH_SS_STATS:
+		memcpy(data, lan743x_gstrings, sizeof(lan743x_gstrings));
+		break;
+	}
+}
+
+static void lan743x_ethtool_get_ethtool_stats(struct net_device *netdev,
+					      struct ethtool_stats *stats,
+					      u64 *data)
+{
+	struct lan743x_adapter *adapter = netdev_priv(netdev);
+	int i;
+	u32 buf;
+
+	for (i = 0; i < (sizeof(lan743x_stat_addr) / (sizeof(u32))); i++) {
+		buf = lan743x_csr_read(adapter, lan743x_stat_addr[i]);
+		data[i] = (u64)buf;
+	}
+}
+
+static int lan743x_ethtool_get_sset_count(struct net_device *netdev, int sset)
+{
+	switch (sset) {
+	case ETH_SS_STATS:
+		return ARRAY_SIZE(lan743x_gstrings);
+	default:
+		return -EOPNOTSUPP;
+	}
+}
+
+static int lan743x_ethtool_get_ts_info(struct net_device *netdev,
+				       struct ethtool_ts_info *ts_info)
+{
+	struct lan743x_adapter *adapter = netdev_priv(netdev);
+
+	ts_info->so_timestamping = SOF_TIMESTAMPING_TX_SOFTWARE |
+				   SOF_TIMESTAMPING_RX_SOFTWARE |
+				   SOF_TIMESTAMPING_SOFTWARE |
+				   SOF_TIMESTAMPING_TX_HARDWARE |
+				   SOF_TIMESTAMPING_RX_HARDWARE |
+				   SOF_TIMESTAMPING_RAW_HARDWARE;
+#ifdef CONFIG_PTP_1588_CLOCK
+	ts_info->phc_index = lan743x_ptp_get_clock_index(adapter);
+#else
+	ts_info->phc_index = -1;
+#endif
+	ts_info->tx_types = BIT(HWTSTAMP_TX_OFF) |
+			    BIT(HWTSTAMP_TX_ON);
+	ts_info->rx_filters = BIT(HWTSTAMP_FILTER_NONE) |
+			      BIT(HWTSTAMP_FILTER_ALL);
+	return 0;
+}
+
+static int lan743x_ethtool_get_eee(struct net_device *netdev,
+				   struct ethtool_eee *eee)
+{
+	struct lan743x_adapter *adapter = netdev_priv(netdev);
+	struct phy_device *phydev = netdev->phydev;
+	u32 buf;
+	int ret;
+
+	if (!phydev)
+		return -EIO;
+	if (!phydev->drv) {
+		NETIF_ERROR(adapter, drv, adapter->netdev,
+			    "Missing PHY Driver");
+		return -EIO;
+	}
+
+	ret = phy_ethtool_get_eee(phydev, eee);
+	if (ret < 0)
+		return ret;
+
+	buf = lan743x_csr_read(adapter, MAC_CR);
+	if (buf & MAC_CR_EEE_EN_) {
+		eee->eee_enabled = true;
+		eee->eee_active = !!(eee->advertised & eee->lp_advertised);
+		eee->tx_lpi_enabled = true;
+		/* EEE_TX_LPI_REQ_DLY & tx_lpi_timer are same uSec unit */
+		buf = lan743x_csr_read(adapter, MAC_EEE_TX_LPI_REQ_DLY_CNT);
+		eee->tx_lpi_timer = buf;
+	} else {
+		eee->eee_enabled = false;
+		eee->eee_active = false;
+		eee->tx_lpi_enabled = false;
+		eee->tx_lpi_timer = 0;
+	}
+
+	return 0;
+}
+
+static int lan743x_ethtool_set_eee(struct net_device *netdev,
+				   struct ethtool_eee *eee)
+{
+	struct lan743x_adapter *adapter = netdev_priv(netdev);
+	struct phy_device *phydev = NULL;
+	u32 buf = 0;
+
+	if (!netdev)
+		return -EINVAL;
+	adapter = netdev_priv(netdev);
+	if (!adapter)
+		return -EINVAL;
+	phydev = netdev->phydev;
+	if (!phydev)
+		return -EIO;
+	if (!phydev->drv) {
+		NETIF_ERROR(adapter, drv, adapter->netdev,
+			    "Missing PHY Driver");
+		return -EIO;
+	}
+
+	if (eee->eee_enabled) {
+		buf = lan743x_csr_read(adapter, MAC_CR);
+		buf |= MAC_CR_EEE_EN_;
+		lan743x_csr_write(adapter, MAC_CR, buf);
+
+		phy_ethtool_set_eee(phydev, eee);
+
+		buf = (u32)eee->tx_lpi_timer;
+		lan743x_csr_write(adapter, MAC_EEE_TX_LPI_REQ_DLY_CNT, buf);
+		NETIF_INFO(adapter, drv, adapter->netdev, "Enabled EEE");
+	} else {
+		buf = lan743x_csr_read(adapter, MAC_CR);
+		buf &= ~MAC_CR_EEE_EN_;
+		lan743x_csr_write(adapter, MAC_CR, buf);
+		NETIF_INFO(adapter, drv, adapter->netdev, "Disabled EEE");
+	}
+
+	return 0;
+}
+
+static const struct ethtool_ops lan743x_ethtool_ops = {
+	.get_drvinfo            = lan743x_ethtool_get_drvinfo,
+	.get_msglevel           = lan743x_ethtool_get_msglevel,
+	.set_msglevel           = lan743x_ethtool_set_msglevel,
+	.get_link               = ethtool_op_get_link,
+
+	.get_eeprom_len         = lan743x_ethtool_get_eeprom_len,
+	.get_strings            = lan743x_ethtool_get_strings,
+	.get_ethtool_stats      = lan743x_ethtool_get_ethtool_stats,
+	.get_sset_count         = lan743x_ethtool_get_sset_count,
+	.get_ts_info            = lan743x_ethtool_get_ts_info,
+	.get_eee                = lan743x_ethtool_get_eee,
+	.set_eee                = lan743x_ethtool_set_eee,
+	.get_link_ksettings     = phy_ethtool_get_link_ksettings,
+	.set_link_ksettings     = phy_ethtool_set_link_ksettings
+};
+
+static void lan743x_device_cleanup(struct lan743x_adapter *adapter)
+{
+	struct net_device *netdev = NULL;
+
+	NETIF_INFO(adapter, drv, adapter->netdev, "performing cleanup");
+
+	if (adapter->init_flags & LAN743X_INIT_FLAG_NETDEV_REGISTERED) {
+		unregister_netdev(adapter->netdev);
+		adapter->init_flags &= ~LAN743X_INIT_FLAG_NETDEV_REGISTERED;
+	}
+	if (adapter->init_flags & LAN743X_COMPONENT_FLAG_TX(0)) {
+		lan743x_tx_cleanup(&adapter->tx[0]);
+		adapter->init_flags &= ~LAN743X_COMPONENT_FLAG_TX(0);
+	}
+	if (adapter->init_flags & LAN743X_COMPONENT_FLAG_RX(0)) {
+		lan743x_rx_cleanup(&adapter->rx[0]);
+		adapter->init_flags &= ~LAN743X_COMPONENT_FLAG_RX(0);
+	}
+	if (adapter->init_flags & LAN743X_COMPONENT_FLAG_DMAC) {
+		lan743x_dmac_cleanup(adapter);
+		adapter->init_flags &= ~LAN743X_COMPONENT_FLAG_DMAC;
+	}
+	if (adapter->init_flags & LAN743X_COMPONENT_FLAG_FCT) {
+		lan743x_fct_cleanup(adapter);
+		adapter->init_flags &= ~LAN743X_COMPONENT_FLAG_FCT;
+	}
+	if (adapter->init_flags & LAN743X_COMPONENT_FLAG_RFE) {
+		lan743x_rfe_cleanup(adapter);
+		adapter->init_flags &= ~LAN743X_COMPONENT_FLAG_RFE;
+	}
+	if (adapter->init_flags & LAN743X_COMPONENT_FLAG_PTP) {
+		lan743x_ptp_cleanup(adapter);
+		adapter->init_flags &= ~LAN743X_COMPONENT_FLAG_PTP;
+	}
+	if (adapter->init_flags & LAN743X_COMPONENT_FLAG_PHY) {
+		lan743x_phy_cleanup(adapter);
+		adapter->init_flags &= ~LAN743X_COMPONENT_FLAG_PHY;
+	}
+	if (adapter->init_flags & LAN743X_COMPONENT_FLAG_MAC) {
+		lan743x_mac_cleanup(adapter);
+		adapter->init_flags &= ~LAN743X_COMPONENT_FLAG_MAC;
+	}
+	if (adapter->init_flags & LAN743X_COMPONENT_FLAG_GPIO) {
+		lan743x_gpio_cleanup(adapter);
+		adapter->init_flags &= ~LAN743X_COMPONENT_FLAG_GPIO;
+	}
+	if (adapter->init_flags & LAN743X_COMPONENT_FLAG_DP) {
+		lan743x_dp_cleanup(adapter);
+		adapter->init_flags &= ~LAN743X_COMPONENT_FLAG_DP;
+	}
+	if (adapter->init_flags & LAN743X_COMPONENT_FLAG_INTR) {
+		lan743x_intr_cleanup(adapter);
+		adapter->init_flags &= ~LAN743X_COMPONENT_FLAG_INTR;
+	}
+	if (adapter->init_flags & LAN743X_COMPONENT_FLAG_CSR) {
+		lan743x_csr_cleanup(adapter);
+		adapter->init_flags &= ~LAN743X_COMPONENT_FLAG_CSR;
+	}
+	if (adapter->init_flags & LAN743X_COMPONENT_FLAG_PCI) {
+		lan743x_pci_cleanup(adapter);
+		adapter->init_flags &= ~LAN743X_COMPONENT_FLAG_PCI;
+	}
+
+	netdev = adapter->netdev;
+	memset(adapter, 0, sizeof(struct lan743x_adapter));
+	free_netdev(netdev);
+}
+
+/* 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 net_device *netdev = NULL;
+	struct lan743x_adapter *adapter = NULL;
+	int ret = -ENODEV;
+
+	NETIF_ASSERT(adapter, probe, adapter->netdev, pdev);
+
+	netdev = alloc_etherdev(sizeof(struct lan743x_adapter));
+	if (!netdev) {
+		NETIF_ERROR(adapter, probe, adapter->netdev,
+			    "alloc_etherdev returned NULL");
+		ret = -ENOMEM;
+		goto clean_up;
+	}
+
+	strncpy(netdev->name, pci_name(pdev), sizeof(netdev->name) - 1);
+	SET_NETDEV_DEV(netdev, &pdev->dev);
+	pci_set_drvdata(pdev, netdev);
+	adapter = netdev_priv(netdev);
+	if (!adapter) {
+		NETIF_ERROR(adapter, probe, adapter->netdev,
+			    "netdev_priv returned NULL");
+		ret = -ENOMEM;
+		goto clean_up;
+	}
+	memset(adapter, 0, sizeof(struct lan743x_adapter));
+	adapter->netdev = netdev;
+	adapter->init_flags = 0;
+	adapter->open_flags = 0;
+	adapter->msg_enable = msg_enable;
+	netdev->max_mtu = LAN743X_MAX_FRAME_SIZE;
+
+	ret = lan743x_pci_init(adapter, pdev);
+	if (ret) {
+		NETIF_ERROR(adapter, probe, adapter->netdev,
+			    "lan743x_pci_init failed, ret = %d", ret);
+		goto clean_up;
+	}
+	adapter->init_flags |= LAN743X_COMPONENT_FLAG_PCI;
+
+	ret = lan743x_csr_init(adapter);
+	if (ret) {
+		NETIF_ERROR(adapter, probe, adapter->netdev,
+			    "lan743x_csr_init failed, ret = %d", ret);
+		goto clean_up;
+	}
+	adapter->init_flags |= LAN743X_COMPONENT_FLAG_CSR;
+
+	ret = lan743x_intr_init(adapter);
+	if (ret) {
+		NETIF_ERROR(adapter, drv, adapter->netdev,
+			    "lan743x_intr_init failed, ret = %d", ret);
+		goto clean_up;
+	}
+	adapter->init_flags |= LAN743X_COMPONENT_FLAG_INTR;
+
+	ret = lan743x_dp_init(adapter);
+	if (ret) {
+		NETIF_ERROR(adapter, probe, adapter->netdev,
+			    "lan743x_dp_init failed, ret = %d", ret);
+		goto clean_up;
+	}
+	adapter->init_flags |= LAN743X_COMPONENT_FLAG_DP;
+
+	ret = lan743x_gpio_init(adapter);
+	if (ret) {
+		NETIF_ERROR(adapter, probe, adapter->netdev,
+			    "lan743x_gpio_init failed, ret = %d", ret);
+		goto clean_up;
+	}
+	adapter->init_flags |= LAN743X_COMPONENT_FLAG_GPIO;
+
+	ret = lan743x_mac_init(adapter);
+	if (ret) {
+		NETIF_ERROR(adapter, probe, adapter->netdev,
+			    "lan743x_mac_init failed, ret = %d", ret);
+		goto clean_up;
+	}
+	adapter->init_flags |= LAN743X_COMPONENT_FLAG_MAC;
+
+	ret = lan743x_phy_init(adapter);
+	if (ret) {
+		NETIF_ERROR(adapter, probe, adapter->netdev,
+			    "lan743x_phy_init failed, ret = %d", ret);
+		goto clean_up;
+	}
+	adapter->init_flags |= LAN743X_COMPONENT_FLAG_PHY;
+
+	ret = lan743x_ptp_init(adapter);
+	if (ret) {
+		NETIF_ERROR(adapter, probe, adapter->netdev,
+			    "lan743x_ptp_init failed, ret = %d", ret);
+		goto clean_up;
+	}
+	adapter->init_flags |= LAN743X_COMPONENT_FLAG_PTP;
+
+	ret = lan743x_rfe_init(adapter);
+	if (ret) {
+		NETIF_ERROR(adapter, probe, adapter->netdev,
+			    "lan743x_rfe_init failed, ret = %d", ret);
+		goto clean_up;
+	}
+	adapter->init_flags |= LAN743X_COMPONENT_FLAG_RFE;
+
+	ret = lan743x_fct_init(adapter);
+	if (ret) {
+		NETIF_ERROR(adapter, probe, adapter->netdev,
+			    "lan743x_fct_init failed, ret = %d", ret);
+		goto clean_up;
+	}
+	adapter->init_flags |= LAN743X_COMPONENT_FLAG_FCT;
+
+	ret = lan743x_dmac_init(adapter);
+	if (ret) {
+		NETIF_ERROR(adapter, probe, adapter->netdev,
+			    "lan743x_dmac_init failed, ret = %d", ret);
+		goto clean_up;
+	}
+	adapter->init_flags |= LAN743X_COMPONENT_FLAG_DMAC;
+
+	ret = lan743x_rx_init(&adapter->rx[0], adapter, 0);
+	if (ret) {
+		NETIF_ERROR(adapter, probe, adapter->netdev,
+			    "lan743x_rx_init failed, ret = %d", ret);
+		goto clean_up;
+	}
+	adapter->init_flags |= LAN743X_COMPONENT_FLAG_RX(0);
+
+	ret = lan743x_tx_init(&adapter->tx[0], adapter, 0);
+	if (ret) {
+		NETIF_ERROR(adapter, probe, adapter->netdev,
+			    "lan743x_tx_init failed, ret = %d", ret);
+		goto clean_up;
+	}
+	adapter->init_flags |= LAN743X_COMPONENT_FLAG_TX(0);
+
+	netdev->netdev_ops = &lan743x_netdev_ops;
+	netdev->ethtool_ops = &lan743x_ethtool_ops;
+	netdev->features = NETIF_F_SG | NETIF_F_TSO | NETIF_F_HW_CSUM;
+	netdev->hw_features = netdev->features;
+
+	strncpy(netdev->name, "eth%d", sizeof(netdev->name));
+	ret = register_netdev(netdev);
+	if (ret < 0) {
+		NETIF_ERROR(adapter, probe, adapter->netdev,
+			    "failed to register net device, ret = %d", ret);
+		goto clean_up;
+	}
+	adapter->init_flags |= LAN743X_INIT_FLAG_NETDEV_REGISTERED;
+
+	NETIF_INFO(adapter, probe, adapter->netdev, "Probe succeeded");
+	ret = 0;
+
+clean_up:
+	if (ret && adapter) {
+		NETIF_WARNING(adapter, probe, adapter->netdev,
+			      "Incomplete initialization, performing clean up");
+		lan743x_device_cleanup(adapter);
+	}
+	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 = NULL;
+	struct lan743x_adapter *adapter = NULL;
+
+	netdev = pci_get_drvdata(pdev);
+	adapter = netdev_priv(netdev);
+	lan743x_device_cleanup(adapter);
+}
+
+static const struct pci_device_id lan743x_pcidev_tbl[] = {
+	{ PCI_DEVICE(PCI_VENDOR_ID_SMSC, PCI_DEVICE_ID_SMSC_LAN7430) },
+	{ 0, }
+};
+
+static struct pci_driver lan743x_pcidev_driver = {
+	.name     = DRIVER_NAME,
+	.id_table = lan743x_pcidev_tbl,
+	.probe    = lan743x_pcidev_probe,
+	.remove   = lan743x_pcidev_remove,
+};
+
+static int __init lan743x_module_init(void)
+{
+	int result = 0;
+
+	pr_info(DRIVER_DESC " %s\n", DRIVER_VERSION);
+	pr_info("module parameter\n");
+	pr_info("  msg_enable = 0x%04X\n", msg_enable);
+
+	result = pci_register_driver(&lan743x_pcidev_driver);
+	if (result)
+		pr_warn("pci_register_driver returned error code, %d\n",
+			result);
+	return result;
+}
+
+module_init(lan743x_module_init);
+
+static void __exit lan743x_module_exit(void)
+{
+	pci_unregister_driver(&lan743x_pcidev_driver);
+}
+
+module_exit(lan743x_module_exit);
+
+MODULE_AUTHOR(DRIVER_AUTHOR);
+MODULE_DESCRIPTION(DRIVER_DESC);
+MODULE_LICENSE("GPL");
+MODULE_VERSION(DRIVER_VERSION);
diff --git a/drivers/net/ethernet/microchip/lan743x.h b/drivers/net/ethernet/microchip/lan743x.h
new file mode 100644
index 0000000..8cf4323
--- /dev/null
+++ b/drivers/net/ethernet/microchip/lan743x.h
@@ -0,0 +1,1417 @@ 
+/*
+ * Copyright (C) 2017 Microchip Technology
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * 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.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, see <http://www.gnu.org/licenses/>.
+ */
+#ifndef _LAN743X_H
+#define _LAN743X_H
+
+/* Register Definitions */
+#define ID_REV					(0x00)
+#define ID_REV_CHIP_ID_MASK_			(0xFFFF0000)
+#define ID_REV_CHIP_REV_MASK_			(0x0000FFFF)
+#define ID_REV_CHIP_ID_7430_			(0x7430)
+
+#define FPGA_REV				(0x04)
+#define FPGA_REV_MINOR_MASK_			(0x0000FF00)
+#define FPGA_REV_MAJOR_MASK_			(0x000000FF)
+
+#define HW_CFG					(0x010)
+#define HW_CFG_INVERT_LED3_POLARITY		BIT(31)
+#define HW_CFG_INVERT_LED2_POLARITY		BIT(30)
+#define HW_CFG_INVERT_LED1_POLARITY		BIT(29)
+#define HW_CFG_INVERT_LED0_POLARITY		BIT(28)
+#define HW_CFG_CLK125_EN_			BIT(25)
+#define HW_CFG_REFCLK25_EN_			BIT(24)
+#define HW_CFG_LED3_EN_				BIT(23)
+#define HW_CFG_LED2_EN_				BIT(22)
+#define HW_CFG_LED1_EN_				BIT(21)
+#define HW_CFG_LED0_EN_				BIT(20)
+#define HW_CFG_EEE_PHY_LUSU_			BIT(17)
+#define HW_CFG_EEE_TSU_				BIT(16)
+#define HW_CFG_RST_PROTECT_			BIT(12)
+#define HW_CFG_RL_TYPE_EEPROM_UIT_CSR_		BIT(11)
+#define HW_CFG_RL_TYPE_EEPROM_UIT_PCIE_		BIT(10)
+#define HW_CFG_RL_TYPE_LED_CONFIG_		BIT(9)
+#define HW_CFG_RL_TYPE_MAC_CONFIG_		BIT(8)
+#define HW_CFG_RL_TYPE_PCI_CONFIG_		BIT(7)
+#define HW_CFG_RL_TYPE_MAC_ADDR_		BIT(6)
+#define HW_CFG_EE_OTP_DL_			BIT(5)
+#define HW_CFG_EE_OTP_RELOAD_			BIT(4)
+#define HW_CFG_ETC_				BIT(3)
+#define HW_CFG_EEP_GPIO_LED_PIN_DIS_		BIT(2)
+#define HW_CFG_LRST_				BIT(1)
+#define HW_CFG_SRST_				BIT(0)
+
+#define PMT_CTL					(0x014)
+#define PMT_CTL_ETH_PHY_D3_COLD_OVR_		BIT(27)
+#define PMT_CTL_MAC_D3_TX_CLK_OVR_		BIT(26)
+#define PMT_CTL_MAC_D3_RX_CLK_OVR_		BIT(25)
+#define PMT_CTL_ETH_PHY_EDPD_PLL_CTL_		BIT(24)
+#define PMT_CTL_ETH_PHY_D3_OVR_			BIT(23)
+#define PMT_CTL_INT_D3_CLK_OVR_			BIT(22)
+#define PMT_CTL_DMAC_D3_CLK_OVR_		BIT(21)
+#define PMT_CTL_1588_D3_CLK_OVR_		BIT(20)
+#define PMT_CTL_MAC_D3_CLK_OVR_			BIT(19)
+#define PMT_CTL_RX_FCT_RFE_D3_CLK_OVR_		BIT(18)
+#define PMT_CTL_TX_FCT_LSO_D3_CLK_OVR_		BIT(17)
+#define PMT_CTL_OTP_EEPROM_D3_CLK_OVR_		BIT(16)
+#define PMT_CTL_GPIO_WAKEUP_EN_			BIT(15)
+#define PMT_CTL_GPIO_WUPS_			BIT(14)
+#define PMT_CTL_EEE_WAKEUP_EN_			BIT(13)
+#define PMT_CTL_EEE_WUPS_			BIT(12)
+#define PMT_CTL_RES_CLR_WKP_MASK_		(0x00000300)
+#define PMT_CTL_RES_CLR_WKP_STS_		BIT(9)
+#define PMT_CTL_RES_CLR_WKP_EN_			BIT(8)
+#define PMT_CTL_READY_				BIT(7)
+#define PMT_CTL_EXT_PHY_RDY_EN_			BIT(5)
+#define PMT_CTL_ETH_PHY_RST_			BIT(4)
+#define PMT_CTL_WOL_EN_				BIT(3)
+#define PMT_CTL_ETH_PHY_WAKE_EN_		BIT(2)
+#define PMT_CTL_WUPS_MASK_			(0x00000003)
+#define PMT_CTL_WUPS_MLT_			(0x00000003)
+#define PMT_CTL_WUPS_MAC_			(0x00000002)
+#define PMT_CTL_WUPS_PHY_			(0x00000001)
+
+#define DP_SEL				(0x024)
+#define DP_SEL_DPRDY_			BIT(31)
+#define DP_SEL_MASK_			(0x0000001F)
+#define DP_SEL_PCIE_DRCV_RAM		(0x00000016)
+#define DP_SEL_PCIE_HRCV_RAM		(0x00000015)
+#define DP_SEL_PCIE_SOT_RAM		(0x00000014)
+#define DP_SEL_PCIE_RETRY_RAM		(0x00000013)
+#define DP_SEL_DMAC_TX_RAM_0		(0x0000000F)
+#define DP_SEL_DMAC_RX_RAM_3		(0x0000000E)
+#define DP_SEL_DMAC_RX_RAM_2		(0x0000000D)
+#define DP_SEL_DMAC_RX_RAM_1		(0x0000000C)
+#define DP_SEL_DMAC_RX_RAM_0		(0x0000000B)
+#define DP_SEL_DMAC_REORDER_BUFFER	(0x0000000A)
+#define DP_SEL_FCT_TX_RAM_0		(0x00000006)
+#define DP_SEL_FCT_RX_RAM_3		(0x00000005)
+#define DP_SEL_FCT_RX_RAM_2		(0x00000004)
+#define DP_SEL_FCT_RX_RAM_1		(0x00000003)
+#define DP_SEL_FCT_RX_RAM_0		(0x00000002)
+#define DP_SEL_RFE_RAM			(0x00000001)
+#define DP_SEL_LSO_RAM			(0x00000000)
+
+#define DP_SEL_VHF_HASH_LEN		(16)
+#define DP_SEL_VHF_VLAN_LEN		(128)
+
+#define DP_CMD				(0x028)
+#define DP_CMD_WRITE_			(0x00000001)
+#define DP_CMD_READ_			(0x00000000)
+
+#define DP_ADDR				(0x02C)
+#define DP_ADDR_MASK_			(0x00003FFF)
+
+#define DP_DATA_0			(0x030)
+
+#define DP_DATA_1			(0x034)
+
+#define DP_DATA_2			(0x038)
+
+#define DP_DATA_3			(0x03C)
+
+#define GPIO_CFG0			(0x050)
+#define GPIO_CFG0_GPIO_DIR_MASK_	(0x0FFF0000)
+#define GPIO_CFG0_GPIO_DIR_(bit)	BIT(16 + (bit))
+#define GPIO_CFG0_GPIO_DATA_MASK_	(0x00000FFF)
+#define GPIO_CFG0_GPIO_DATA_(bit)	BIT(0 + (bit))
+
+#define GPIO_CFG1			(0x054)
+#define GPIO_CFG1_GPIOEN_MASK_		(0x0FFF0000)
+#define GPIO_CFG1_GPIOEN_(bit)		BIT(16 + (bit))
+#define GPIO_CFG1_GPIOBUF_MASK_		(0x00000FFF)
+#define GPIO_CFG1_GPIOBUF_(bit)		BIT(0 + (bit))
+
+#define GPIO_CFG2			(0x058)
+#define GPIO_CFG2_1588_POL_MASK_	(0x00000FFF)
+#define GPIO_CFG2_1588_POL_(bit)	BIT(0 + (bit))
+
+#define GPIO_CFG3			(0x05C)
+#define GPIO_CFG3_1588_CH_SEL_MASK_	(0x0FFF0000)
+#define GPIO_CFG3_1588_CH_SEL_(bit)	BIT(16 + (bit))
+#define GPIO_CFG3_1588_OE_MASK_		(0x00000FFF)
+#define GPIO_CFG3_1588_OE_(bit)		BIT(0 + (bit))
+
+#define GPIO_WAKE			(0x060)
+#define GPIO_WAKE_GPIOPOL_MASK_		(0x0FFF0000)
+#define GPIO_WAKE_GPIOPOL_(bit)		BIT(16 + (bit))
+#define GPIO_WAKE_GPIOWK_MASK_		(0x00000FFF)
+#define GPIO_WAKE_GPIOWK_(bit)		BIT(0 + (bit))
+
+#define GPIO_INT_STS			(0x64)
+#define GPIO_INT_EN_SET			(0x68)
+#define GPIO_INT_EN_CLR			(0x6C)
+#define GPIO_INT_BIT_(bit)		BIT(0 + (bit))
+
+#define FCT_INT_STS			(0xA0)
+#define FCT_INT_EN_SET			(0xA4)
+#define FCT_INT_EN_CLR			(0xA8)
+#define FCT_INT_MASK_RDFPA_		(0xF0000000)
+#define FCT_INT_BIT_RDFPA_3_		BIT(31)
+#define FCT_INT_BIT_RDFPA_2_		BIT(30)
+#define FCT_INT_BIT_RDFPA_1_		BIT(29)
+#define FCT_INT_BIT_RDFPA_0_		BIT(28)
+#define FCT_INT_MASK_RDFO_		(0x0F000000)
+#define FCT_INT_BIT_RDFO_3_		BIT(27)
+#define FCT_INT_BIT_RDFO_2_		BIT(26)
+#define FCT_INT_BIT_RDFO_1_		BIT(25)
+#define FCT_INT_BIT_RDFO_0_		BIT(24)
+#define FCT_INT_MASK_RXDF_		(0x00F00000)
+#define FCT_INT_BIT_RXDF_3_		BIT(23)
+#define FCT_INT_BIT_RXDF_2_		BIT(22)
+#define FCT_INT_BIT_RXDF_1_		BIT(21)
+#define FCT_INT_BIT_RXDF_0_		BIT(20)
+#define FCT_INT_BIT_TXE_		BIT(16)
+#define FCT_INT_BIT_TDFO_		BIT(12)
+#define FCT_INT_BIT_TDFU_		BIT(8)
+#define FCT_INT_BIT_RX_DIS_3_		BIT(7)
+#define FCT_INT_BIT_RX_DIS_2_		BIT(6)
+#define FCT_INT_BIT_RX_DIS_1_		BIT(5)
+#define FCT_INT_BIT_RX_DIS_0_		BIT(4)
+#define FCT_INT_BIT_TX_DIS_		BIT(0)
+#define FCT_INT_MASK_ERRORS_	\
+	(FCT_INT_MASK_RDFO_ |	\
+	FCT_INT_MASK_RXDF_ |	\
+	FCT_INT_BIT_TXE_ |	\
+	FCT_INT_BIT_TDFO_ |	\
+	FCT_INT_BIT_TDFU_)
+
+#define FCT_RX_CTL			(0xAC)
+#define FCT_RX_CTL_EN_(channel)		BIT(28 + (channel))
+#define FCT_RX_CTL_DIS_(channel)	BIT(24 + (channel))
+#define FCT_RX_CTL_RESET_(channel)	BIT(20 + (channel))
+
+#define FCT_RX_FIFO_END			(0xB0)
+#define FCT_RX_FIFO_END_3_		(0x3F000000)
+#define FCT_RX_FIFO_END_2_		(0x003F0000)
+#define FCT_RX_FIFO_END_1_		(0x00003F00)
+#define FCT_RX_FIFO_END_0_		(0x0000003F)
+
+#define FCT_RX_USED_0			(0xB4)
+#define FCT_RX_USED_1			(0xB8)
+#define FCT_RX_USED_2			(0xBC)
+#define FCT_RX_USED_3			(0xC0)
+#define FCT_RX_USED_MASK_		(0x0000FFFF)
+
+#define FCT_TX_CTL			(0xC4)
+#define FCT_TX_CTL_EN_(channel)		BIT(28 + (channel))
+#define FCT_TX_CTL_DIS_(channel)	BIT(24 + (channel))
+#define FCT_TX_CTL_RESET_(channel)	BIT(20 + (channel))
+
+#define FCT_TX_FIFO_END			(0xC8)
+#define FCT_TX_FIFO_END_0_		(0x0000003F)
+
+#define FCT_TX_USED_0			(0xCC)
+#define FCT_TX_USED_0_MASK_		(0x0000FFFF)
+
+#define FCT_CFG					(0xDC)
+#define FCT_CFG_ENABLE_OTHER_ROUTING_HEADERS_	BIT(4)
+#define FCT_CFG_STORE_BAD_FRAMES_		BIT(0)
+
+#define FCT_FLOW(rx_channel)			(0xE0 + ((rx_channel) << 2))
+#define FCT_FLOW_CTL_OFF_THRESHOLD_		(0x00007F00)
+#define FCT_FLOW_CTL_OFF_THRESHOLD_SET_(value) \
+	((value << 8) & FCT_FLOW_CTL_OFF_THRESHOLD_)
+#define FCT_FLOW_CTL_REQ_EN_			BIT(7)
+#define FCT_FLOW_CTL_ON_THRESHOLD_		(0x0000007F)
+#define FCT_FLOW_CTL_ON_THRESHOLD_SET_(value) \
+	((value << 0) & FCT_FLOW_CTL_ON_THRESHOLD_)
+
+#define MAC_CR				(0x100)
+#define MAC_CR_MII_EN_			BIT(19)
+#define MAC_CR_EEE_TX_CLK_STOP_EN_	BIT(18)
+#define MAC_CR_EEE_EN_			BIT(17)
+#define MAC_CR_EEE_TLAR_EN_		BIT(16)
+#define MAC_CR_ADP_			BIT(13)
+#define MAC_CR_ADD_			BIT(12)
+#define MAC_CR_ASD_			BIT(11)
+#define MAC_CR_INT_LOOP_		BIT(10)
+#define MAC_CR_BOLMT_MASK_		(0x000000C0)
+#define MAC_CR_CNTR_RST_		BIT(5)
+#define MAC_CR_CNTR_WEN_		BIT(4)
+#define MAC_CR_DPX_			BIT(3)
+#define MAC_CR_SPEED_MASK_		(0x00000006)
+#define MAC_CR_SPEED_1000_		(0x00000004)
+#define MAC_CR_SPEED_100_		(0x00000002)
+#define MAC_CR_SPEED_10_		(0x00000000)
+#define MAC_CR_RST_			BIT(0)
+
+#define MAC_RX				(0x104)
+#define MAC_RX_MAX_SIZE_SHIFT_		(16)
+#define MAC_RX_MAX_SIZE_MASK_		(0x3FFF0000)
+#define MAC_RX_LEN_FLD_LT_CHK_		BIT(6)
+#define MAC_RX_WTL_			BIT(5)
+#define MAC_RX_FCS_STRIP_		BIT(4)
+#define MAC_RX_LFCD_			BIT(3)
+#define MAC_RX_VLAN_FSE_		BIT(2)
+#define MAC_RX_RXD_			BIT(1)
+#define MAC_RX_RXEN_			BIT(0)
+
+#define MAC_TX				(0x108)
+#define MAC_TX_BAD_FCS_			BIT(2)
+#define MAC_TX_TXD_			BIT(1)
+#define MAC_TX_TXEN_			BIT(0)
+
+#define MAC_FLOW			(0x10C)
+#define MAC_FLOW_CR_FORCE_FC_		BIT(31)
+#define MAC_FLOW_CR_TX_FCEN_		BIT(30)
+#define MAC_FLOW_CR_RX_FCEN_		BIT(29)
+#define MAC_FLOW_CR_FPF_		BIT(28)
+#define MAC_FLOW_CR_FCPT_MASK_		(0x0000FFFF)
+
+#define MAC_RAND_SEED			(0x110)
+#define MAC_RAND_SEED_MASK_		(0x0000FFFF)
+
+#define MAC_ERR_STS			(0x114)
+#define MAC_ERR_STS_RESERVED_		(0xFFFFF803)
+#define MAC_ERR_STS_LEN_ERR_		BIT(10)
+#define MAC_ERR_STS_RXERR_		BIT(9)
+#define MAC_ERR_STS_FERR_		BIT(8)
+#define MAC_ERR_STS_LFERR_		BIT(7)
+#define MAC_ERR_STS_RFERR_		BIT(6)
+#define MAC_ERR_STS_RWTERR_		BIT(5)
+#define MAC_ERR_STS_ECERR_		BIT(4)
+#define MAC_ERR_STS_ALERR_		BIT(3)
+#define MAC_ERR_STS_URERR_		BIT(2)
+
+#define MAC_RX_ADDRH			(0x118)
+#define MAC_RX_ADDRH_MASK_		(0x0000FFFF)
+
+#define MAC_RX_ADDRL			(0x11C)
+#define MAC_RX_ADDRL_MASK_		(0xFFFFFFFF)
+
+#define MAC_MII_ACC			(0x120)
+#define MAC_MII_ACC_PHY_ADDR_SHIFT_	(11)
+#define MAC_MII_ACC_PHY_ADDR_MASK_	(0x0000F800)
+#define MAC_MII_ACC_MIIRINDA_SHIFT_	(6)
+#define MAC_MII_ACC_MIIRINDA_MASK_	(0x000007C0)
+#define MAC_MII_ACC_MII_READ_		(0x00000000)
+#define MAC_MII_ACC_MII_WRITE_		(0x00000002)
+#define MAC_MII_ACC_MII_BUSY_		BIT(0)
+
+#define MAC_MII_DATA			(0x124)
+#define MAC_MII_DATA_MASK_		(0x0000FFFF)
+
+#define MAC_RGMII_ID			(0x128)
+#define MAC_RGMII_ID_TXC_DELAY_EN_	BIT(1)
+#define MAC_RGMII_ID_RXC_DELAY_EN_	BIT(0)
+
+#define MAC_EEE_TX_LPI_REQ_DLY_CNT		(0x130)
+#define MAC_EEE_TX_LPI_REQ_DLY_CNT_MASK_	(0xFFFFFFFF)
+
+#define MAC_EEE_TW_TX_SYS			(0x134)
+#define MAC_EEE_TW_TX_SYS_CNT1G_MASK_		(0xFFFF0000)
+#define MAC_EEE_TW_TX_SYS_CNT100M_MASK_		(0x0000FFFF)
+
+#define MAC_EEE_TX_LPI_AUTO_REM_DLY		(0x138)
+#define MAC_EEE_TX_LPI_AUTO_REM_DLY_CNT_	(0x00FFFFFF)
+
+#define MAC_WUCSR				(0x140)
+#define MAC_WUCSR_TESTMODE_			BIT(31)
+#define MAC_WUCSR_IGNORE_WU_			BIT(20)
+#define MAC_WUCSR_IGNORE_WU_TIME_		(0x000F0000)
+#define MAC_WUCSR_DISCARD_FRAMES_D0A_		BIT(15)
+#define MAC_WUCSR_RFE_WAKE_EN_			BIT(14)
+#define MAC_WUCSR_EEE_TX_WAKE_			BIT(13)
+#define MAC_WUCSR_EEE_TX_WAKE_EN_		BIT(12)
+#define MAC_WUCSR_EEE_RX_WAKE_			BIT(11)
+#define MAC_WUCSR_EEE_RX_WAKE_EN_		BIT(10)
+#define MAC_WUCSR_RFE_WAKE_FR_			BIT(9)
+#define MAC_WUCSR_STORE_WAKE_			BIT(8)
+#define MAC_WUCSR_PFDA_FR_			BIT(7)
+#define MAC_WUCSR_WUFR_				BIT(6)
+#define MAC_WUCSR_MPR_				BIT(5)
+#define MAC_WUCSR_BCST_FR_			BIT(4)
+#define MAC_WUCSR_PFDA_EN_			BIT(3)
+#define MAC_WUCSR_WAKE_EN_			BIT(2)
+#define MAC_WUCSR_MPEN_				BIT(1)
+#define MAC_WUCSR_BCST_EN_			BIT(0)
+
+#define MAC_WK_SRC				(0x144)
+#define MAC_WK_SRC_GPIOX_INT_WK_SHIFT_		(20)
+#define MAC_WK_SRC_GPIOX_INT_WK_MASK_		(0xFFF00000)
+#define MAC_WK_SRC_ETH_PHY_WK_			BIT(17)
+#define MAC_WK_SRC_IPV6_TCPSYN_RCD_WK_		BIT(16)
+#define MAC_WK_SRC_IPV4_TCPSYN_RCD_WK_		BIT(15)
+#define MAC_WK_SRC_EEE_TX_WK_			BIT(14)
+#define MAC_WK_SRC_EEE_RX_WK_			BIT(13)
+#define MAC_WK_SRC_RFE_FR_WK_			BIT(12)
+#define MAC_WK_SRC_PFDA_FR_WK_			BIT(11)
+#define MAC_WK_SRC_MP_FR_WK_			BIT(10)
+#define MAC_WK_SRC_BCAST_FR_WK_			BIT(9)
+#define MAC_WK_SRC_WU_FR_WK_			BIT(8)
+#define MAC_WK_SRC_WK_FR_SAVED_			BIT(7)
+#define MAC_WK_SRC_WK_FR_SAVE_RX_CH_		(0x00000060)
+#define MAC_WK_SRC_WUFF_MATCH_MASK_		(0x0000001F)
+
+#define MAC_WUF_CFG0			(0x150)
+#define MAC_NUM_OF_WUF_CFG		(32)
+#define MAC_WUF_CFG_BEGIN		(WUF_CFG0)
+#define MAC_WUF_CFG(index)		(WUF_CFG_BEGIN + (4 * (index)))
+#define MAC_WUF_CFG_EN_			BIT(31)
+#define MAC_WUF_CFG_TYPE_MASK_		(0x03000000)
+#define MAC_WUF_CFG_TYPE_MCAST_		(0x02000000)
+#define MAC_WUF_CFG_TYPE_ALL_		(0x01000000)
+#define MAC_WUF_CFG_TYPE_UCAST_		(0x00000000)
+#define MAC_WUF_CFG_OFFSET_SHIFT_	(16)
+#define MAC_WUF_CFG_OFFSET_MASK_	(0x00FF0000)
+#define MAC_WUF_CFG_CRC16_MASK_		(0x0000FFFF)
+
+#define MAC_WUF_MASK0_0			(0x200)
+#define MAC_WUF_MASK0_1			(0x204)
+#define MAC_WUF_MASK0_2			(0x208)
+#define MAC_WUF_MASK0_3			(0x20C)
+#define MAC_NUM_OF_WUF_MASK		(32)
+#define MAC_WUF_MASK0_BEGIN		(MAC_WUF_MASK0_0)
+#define MAC_WUF_MASK1_BEGIN		(MAC_WUF_MASK0_1)
+#define MAC_WUF_MASK2_BEGIN		(MAC_WUF_MASK0_2)
+#define MAC_WUF_MASK3_BEGIN		(MAC_WUF_MASK0_3)
+#define MAC_WUF_MASK0(index)		(MAC_WUF_MASK0_BEGIN + (0x10 * (index)))
+#define MAC_WUF_MASK1(index)		(MAC_WUF_MASK1_BEGIN + (0x10 * (index)))
+#define MAC_WUF_MASK2(index)		(MAC_WUF_MASK2_BEGIN + (0x10 * (index)))
+#define MAC_WUF_MASK3(index)		(MAC_WUF_MASK3_BEGIN + (0x10 * (index)))
+
+/* offset 0x400 - 0x500, x may range from 0 to 32, for a total of 33 entries */
+#define RFE_ADDR_FILT_HI(x)		(0x400 + (8 * (x)))
+#define RFE_ADDR_FILT_HI_VALID_		BIT(31)
+#define RFE_ADDR_FILT_HI_TYPE_MASK_	(0x40000000)
+#define RFE_ADDR_FILT_HI_TYPE_SRC_	(0x40000000)
+#define RFE_ADDR_FILT_HI_TYPE_DST_	(0x00000000)
+#define RFE_ADDR_FILT_HI_PRI_FRM_	BIT(20)
+#define RFE_ADDR_FILT_HI_RSS_EN_	BIT(19)
+#define RFE_ADDR_FILT_HI_CH_EN_		BIT(18)
+#define RFE_ADDR_FILT_HI_CH_NUM_MASK_	(0x00030000)
+#define RFE_ADDR_FILT_HI_ADDR_MASK_	(0x0000FFFF)
+
+/* offset 0x404 - 0x504, x may range from 0 to 32, for a total of 33 entries */
+#define RFE_ADDR_FILT_LO(x)		(0x404 + (8 * (x)))
+#define RFE_ADDR_FILT_LO_ADDR_MASK_	(0xFFFFFFFF)
+
+#define RFE_CTL				(0x508)
+#define RFE_CTL_EN_OTHER_RT_HEADER_	BIT(18)
+#define RFE_CTL_DEFAULT_RX_CH_0_	(0x00000000)
+#define RFE_CTL_DEFAULT_RX_CH_1_	(0x00010000)
+#define RFE_CTL_DEFAULT_RX_CH_2_	(0x00020000)
+#define RFE_CTL_DEFAULT_RX_CH_3_	(0x00030000)
+#define RFE_CTL_DEFAULT_RX_CH_MASK_	(0x00030000)
+#define RFE_CTL_PASS_WKP_		BIT(15)
+#define RFE_CTL_IGMP_COE_		BIT(14)
+#define RFE_CTL_ICMP_COE_		BIT(13)
+#define RFE_CTL_TCPUDP_COE_		BIT(12)
+#define RFE_CTL_IP_COE_			BIT(11)
+#define RFE_CTL_AB_			BIT(10)
+#define RFE_CTL_AM_			BIT(9)
+#define RFE_CTL_AU_			BIT(8)
+#define RFE_CTL_VLAN_STRIP_		BIT(7)
+#define RFE_CTL_DISCARD_UNTAGGED_	BIT(6)
+#define RFE_CTL_VLAN_FILTER_		BIT(5)
+#define RFE_CTL_SA_FILTER_		BIT(4)
+#define RFE_CTL_MCAST_HASH_		BIT(3)
+#define RFE_CTL_DA_HASH_		BIT(2)
+#define RFE_CTL_DA_PERFECT_		BIT(1)
+#define RFE_CTL_RST_			BIT(0)
+
+#define RFE_PRI_SEL			(0x50C)
+#define RFE_PRI_SEL_CH_NUM_PRI_7_	(0xC0000000)
+#define RFE_PRI_SEL_CH_NUM_PRI_6_	(0x30000000)
+#define RFE_PRI_SEL_CH_NUM_PRI_5_	(0x0C000000)
+#define RFE_PRI_SEL_CH_NUM_PRI_4_	(0x03000000)
+#define RFE_PRI_SEL_CH_NUM_PRI_3_	(0x00C00000)
+#define RFE_PRI_SEL_CH_NUM_PRI_2_	(0x00300000)
+#define RFE_PRI_SEL_CH_NUM_PRI_1_	(0x000C0000)
+#define RFE_PRI_SEL_CH_NUM_PRI_0_	(0x00030000)
+#define RFE_PRI_SEL_RSS_EN_PRI_7_	BIT(15)
+#define RFE_PRI_SEL_RSS_EN_PRI_6_	BIT(14)
+#define RFE_PRI_SEL_RSS_EN_PRI_5_	BIT(13)
+#define RFE_PRI_SEL_RSS_EN_PRI_4_	BIT(12)
+#define RFE_PRI_SEL_RSS_EN_PRI_3_	BIT(11)
+#define RFE_PRI_SEL_RSS_EN_PRI_2_	BIT(10)
+#define RFE_PRI_SEL_RSS_EN_PRI_1_	BIT(9)
+#define RFE_PRI_SEL_RSS_EN_PRI_0_	BIT(8)
+#define RFE_PRI_SEL_FM_PRI_EN_		BIT(7)
+#define RFE_PRI_SEL_FM_PRI_THRESH_	(0x00000070)
+#define RFE_PRI_SEL_USE_PRECEDENCE_	BIT(3)
+#define RFE_PRI_SEL_USE_IP_		BIT(2)
+#define RFE_PRI_SEL_USE_TAG_		BIT(1)
+#define RFE_PRI_SEL_VL_HIGHER_PRI_	BIT(0)
+
+#define RFE_DIFFSERV0			(0x510)
+#define RFE_DIFFSERV1			(0x514)
+#define RFE_DIFFSERV2			(0x518)
+#define RFE_DIFFSERV3			(0x51C)
+#define RFE_DIFFSERV4			(0x520)
+#define RFE_DIFFSERV5			(0x524)
+#define RFE_DIFFSERV6			(0x528)
+#define RFE_DIFFSERV7			(0x52C)
+
+#define RFE_RSS_CFG			(0x554)
+#define RFE_RSS_CFG_UDP_IPV6_EX_	BIT(16)
+#define RFE_RSS_CFG_TCP_IPV6_EX_	BIT(15)
+#define RFE_RSS_CFG_IPV6_EX_		BIT(14)
+#define RFE_RSS_CFG_UDP_IPV6_		BIT(13)
+#define RFE_RSS_CFG_TCP_IPV6_		BIT(12)
+#define RFE_RSS_CFG_IPV6_		BIT(11)
+#define RFE_RSS_CFG_UDP_IPV4_		BIT(10)
+#define RFE_RSS_CFG_TCP_IPV4_		BIT(9)
+#define RFE_RSS_CFG_IPV4_		BIT(8)
+#define RFE_RSS_CFG_VALID_HASH_BITS_	(0x000000E0)
+#define RFE_RSS_CFG_RSS_QUEUE_ENABLE_	BIT(2)
+#define RFE_RSS_CFG_RSS_HASH_STORE_	BIT(1)
+#define RFE_RSS_CFG_RSS_ENABLE_		BIT(0)
+
+#define RFE_HASH_KEY0			(0x558)
+#define RFE_HASH_KEY1			(0x55C)
+#define RFE_HASH_KEY2			(0x560)
+#define RFE_HASH_KEY3			(0x564)
+#define RFE_HASH_KEY4			(0x568)
+#define RFE_HASH_KEY5			(0x56C)
+#define RFE_HASH_KEY6			(0x570)
+#define RFE_HASH_KEY7			(0x574)
+#define RFE_HASH_KEY8			(0x578)
+#define RFE_HASH_KEY9			(0x57C)
+
+#define MAC_WUCSR2			(0x600)
+#define MAC_WUCSR2_CSUM_DISABLE_	BIT(31)
+#define MAC_WUCSR2_EN_OTHER_RT_HDRS_	BIT(30)
+#define MAC_WUCSR2_FARP_FR_		BIT(10)
+#define MAC_WUCSR2_FNS_FR_		BIT(9)
+#define MAC_WUCSR2_NA_SA_SEL_		BIT(8)
+#define MAC_WUCSR2_NS_RCD_		BIT(7)
+#define MAC_WUCSR2_ARP_RCD_		BIT(6)
+#define MAC_WUCSR2_IPV6_TCPSYN_RCD_	BIT(5)
+#define MAC_WUCSR2_IPV4_TCPSYN_RCD_	BIT(4)
+#define MAC_WUCSR2_NS_OFFLOAD_EN_	BIT(3)
+#define MAC_WUCSR2_ARP_OFFLOAD_EN_	BIT(2)
+#define MAC_WUCSR2_IPV6_TCPSYN_WAKE_EN_ BIT(1)
+#define MAC_WUCSR2_IPV4_TCPSYN_WAKE_EN_ BIT(0)
+
+#define MAC_INT_STS			(0x604)
+#define MAC_INT_EN_SET			(0x608)
+#define MAC_INT_EN_CLR			(0x60C)
+#define MAC_INT_BIT_EEE_START_TX_LPI_	BIT(26)
+#define MAC_INT_BIT_EEE_STOP_TX_LPI_	BIT(25)
+#define MAC_INT_BIT_EEE_RX_LPI_		BIT(24)
+#define MAC_INT_BIT_MACRTO_		BIT(23)
+#define MAC_INT_BIT_MAC_TX_DIS_		BIT(19)
+#define MAC_INT_BIT_MAC_RX_DIS_		BIT(18)
+#define MAC_INT_BIT_MAC_ERR_		BIT(15)
+#define MAC_INT_BIT_MAC_RX_CNT_ROLL_	BIT(14)
+#define MAC_INT_BIT_MAC_TX_CNT_ROLL_	BIT(13)
+
+#define INT_STS				(0x780)
+#define INT_BIT_RESERVED_		(0xF0FEF000)
+#define INT_BIT_DMA_RX_(channel)	BIT(24 + (channel))
+#define INT_BIT_ALL_RX_			(0x0F000000)
+#define INT_BIT_DMA_TX_(channel)	BIT(16 + (channel))
+#define INT_BIT_ALL_TX_			(0x000F0000)
+#define INT_BIT_GPIO_			BIT(11)
+#define INT_BIT_DMA_GEN_		BIT(10)
+#define INT_BIT_SW_GP_			BIT(9)
+#define INT_BIT_PCIE_			BIT(8)
+#define INT_BIT_1588_			BIT(7)
+#define INT_BIT_OTP_RDY_		BIT(6)
+#define INT_BIT_PHY_			BIT(5)
+#define INT_BIT_DP_			BIT(4)
+#define INT_BIT_MAC_			BIT(3)
+#define INT_BIT_FCT_			BIT(2)
+#define INT_BIT_GPT_			BIT(1)
+#define INT_BIT_ALL_OTHER_		(0x00000FFE)
+#define INT_BIT_MAS_			BIT(0)
+
+#define INT_SET				(0x784)
+
+#define INT_EN_SET			(0x788)
+
+#define INT_EN_CLR			(0x78C)
+
+#define INT_VEC_EN_SET			(0x794)
+#define INT_VEC_EN_CLR			(0x798)
+#define INT_VEC_EN_(vector_index)	BIT(0 + vector_index)
+
+#define INT_VEC_MAP0			(0x7A0)
+#define INT_VMAP0_DMA_RX3_VEC_MASK_	(0x0000F000)
+#define INT_VMAP0_DMA_RX2_VEC_MASK_	(0x00000F00)
+#define INT_VMAP0_DMA_RX1_VEC_MASK_	(0x000000F0)
+#define INT_VMAP0_DMA_RX0_VEC_MASK_	(0x0000000F)
+
+#define INT_VEC_MAP1			(0x7A4)
+#define INT_VMAP1_DMA_TX0_VEC_MASK_	(0x0000000F)
+
+#define INT_VEC_MAP2			(0x7A8)
+#define INT_VMAP2_FCT_VEC_MASK_		(0x00F00000)
+#define INT_VMAP2_DMA_GEN_VEC_MASK_	(0x000F0000)
+#define INT_VMAP2_SW_GP_VEC_MASK_	(0x0000F000)
+#define INT_VMAP2_1588_VEC_MASK_	(0x00000F00)
+#define INT_VMAP2_GPT_VEC_MASK_		(0x000000F0)
+#define INT_VMAP2_OTHER_VEC_MASK_	(0x0000000F)
+
+#define INT_MOD_MAP0			(0x7B0)
+#define INT_MMAP0_DMA_RX3_MASK_		(0x0000F000)
+#define INT_MMAP0_DMA_RX2_MASK_		(0x00000F00)
+#define INT_MMAP0_DMA_RX1_MASK_		(0x000000F0)
+#define INT_MMAP0_DMA_RX0_MASK_		(0x0000000F)
+
+#define INT_MOD_MAP1			(0x7B4)
+#define INT_MMAP1_DMA_TX0_MASK_		(0x0000000F)
+
+#define INT_MOD_MAP2			(0x7B8)
+#define INT_MMAP2_FCT_MOD_MASK_		(0x00F00000)
+#define INT_MMAP2_DMA_GEN_MASK_		(0x000F0000)
+#define INT_MMAP2_SW_GP_MASK_		(0x0000F000)
+#define INT_MMAP2_1588_MASK_		(0x00000F00)
+#define INT_MMAP2_GPT_MASK_		(0x000000F0)
+#define INT_MMAP2_OTHER_MASK_		(0x0000000F)
+
+#define INT_MOD_CFG0			(0x7C0)
+#define INT_MOD_CFG1			(0x7C4)
+#define INT_MOD_CFG2			(0x7C8)
+#define INT_MOD_CFG3			(0x7CC)
+#define INT_MOD_CFG4			(0x7D0)
+#define INT_MOD_CFG5			(0x7D4)
+#define INT_MOD_CFG6			(0x7C8)
+#define INT_MOD_CFG7			(0x7DC)
+#define INT_MOD_CFG_STATUS_		BIT(18)
+#define INT_MOD_CFG_START_		BIT(17)
+#define INT_MOD_CFG_TMODE_MASK_		(0x00010000)
+#define INT_MOD_CFG_TMODE_ABS_		(0x00000000)
+#define INT_MOD_CFG_TMODE_CREDIT_	(0x00010000)
+#define INT_MOD_CFG_INTERVAL_MASK_	(0x00001FFF)
+
+#define PTP_CMD_CTL					(0x0A00)
+#define PTP_CMD_CTL_PTP_CLOCK_TARGET_READ_		BIT(13)
+#define PTP_CMD_CTL_PTP_MANUAL_CAPTURE_SEL_MASK_	(0x00001E00)
+#define PTP_CMD_CTL_PTP_MANUAL_CAPTURE_			BIT(8)
+#define PTP_CMD_CTL_PTP_CLOCK_TEMP_RATE_		BIT(7)
+#define PTP_CMD_CTL_PTP_CLK_STP_NSEC_			BIT(6)
+#define PTP_CMD_CTL_PTP_CLOCK_STEP_SEC_			BIT(5)
+#define PTP_CMD_CTL_PTP_CLOCK_LOAD_			BIT(4)
+#define PTP_CMD_CTL_PTP_CLOCK_READ_			BIT(3)
+#define PTP_CMD_CTL_PTP_ENABLE_				BIT(2)
+#define PTP_CMD_CTL_PTP_DISABLE_			BIT(1)
+#define PTP_CMD_CTL_PTP_RESET_				BIT(0)
+#define PTP_GENERAL_CONFIG				(0x0A04)
+#define PTP_GENERAL_CONFIG_TSU_ENABLE_			BIT(31)
+#define PTP_GENERAL_CONFIG_GPIO_FECR_			BIT(25)
+#define PTP_GENERAL_CONFIG_GPIO_RECR_			BIT(24)
+#define PTP_GENERAL_CONFIG_GPIO_PTP_TIMER_INT_X_CLEAR_EN_(channel) \
+	(BIT(12 + ((channel) << 3)))
+#define PTP_GENERAL_CONFIG_GPIO_PTP_TIMER_INT_X_CLEAR_SEL_SET_(channel, value) \
+	(((value) & 0xF) << (8 + ((channel) << 3)))
+#define PTP_GENERAL_CONFIG_CLOCK_EVENT_X_MASK_(channel) \
+	(0x7 << (1 + ((channel) << 2)))
+#define PTP_GENERAL_CONFIG_CLOCK_EVENT_100NS_	(0)
+#define PTP_GENERAL_CONFIG_CLOCK_EVENT_10US_	(1)
+#define PTP_GENERAL_CONFIG_CLOCK_EVENT_100US_	(2)
+#define PTP_GENERAL_CONFIG_CLOCK_EVENT_1MS_	(3)
+#define PTP_GENERAL_CONFIG_CLOCK_EVENT_10MS_	(4)
+#define PTP_GENERAL_CONFIG_CLOCK_EVENT_200MS_	(5)
+#define PTP_GENERAL_CONFIG_CLOCK_EVENT_TOGGLE_	(6)
+#define PTP_GENERAL_CONFIG_CLOCK_EVENT_INT_	(7)
+#define PTP_GENERAL_CONFIG_CLOCK_EVENT_X_SET_(channel, value) \
+	(((value) & 0x7) << (1 + ((channel) << 2)))
+#define PTP_GENERAL_CONFIG_RELOAD_ADD_X_(channel)	(BIT((channel) << 2))
+
+#define PTP_INT_STS				(0x0A08)
+#define PTP_INT_EN_SET				(0x0A0C)
+#define PTP_INT_EN_CLR				(0x0A10)
+#define PTP_INT_BIT_GPIO_FE(gpio_num)		BIT(24 + (gpio_num))
+#define PTP_INT_BIT_GPIO_RE(gpio_num)		BIT(16 + (gpio_num))
+#define PTP_INT_BIT_TX_SWTS_ERR_		BIT(13)
+#define PTP_INT_BIT_TX_TS_			BIT(12)
+#define PTP_INT_BIT_RX_TS_			BIT(8)
+#define PTP_INT_BIT_TIMER_B_			BIT(1)
+#define PTP_INT_BIT_TIMER_A_			BIT(0)
+#define PTP_INT_BIT_TIMER_(channel)		BIT(channel)
+
+#define PTP_CLOCK_SEC				(0x0A14)
+#define PTP_CLOCK_NS				(0x0A18)
+#define PTP_CLOCK_SUBNS				(0x0A1C)
+#define PTP_CLOCK_RATE_ADJ			(0x0A20)
+#define PTP_CLOCK_RATE_ADJ_DIR_			BIT(31)
+#define PTP_CLOCK_RATE_ADJ_VALUE_MASK_		(0x3FFFFFFF)
+#define PTP_CLOCK_TEMP_RATE_ADJ			(0x0A24)
+#define PTP_CLOCK_TEMP_RATE_DURATION		(0x0A28)
+#define PTP_CLOCK_STEP_ADJ			(0x0A2C)
+#define PTP_CLOCK_STEP_ADJ_DIR_			BIT(31)
+#define PTP_CLOCK_STEP_ADJ_VALUE_MASK_		(0x3FFFFFFF)
+#define PTP_CLOCK_TARGET_SEC_X(channel)		(0x0A30 + ((channel) << 4))
+#define PTP_CLOCK_TARGET_NS_X(channel)		(0x0A34 + ((channel) << 4))
+#define PTP_CLOCK_TARGET_RELOAD_SEC_X(channel)	(0x0A38 + ((channel) << 4))
+#define PTP_CLOCK_TARGET_RELOAD_NS_X(channel)	(0x0A3C + ((channel) << 4))
+#define PTP_USER_MAC_HI				(0x0A50)
+#define PTP_USER_MAC_LO				(0x0A54)
+#define PTP_GPIO_SEL				(0x0A58)
+#define PTP_LATENCY				(0x0A5C)
+#define PTP_CAP_INFO				(0x0A60)
+#define PTP_CAP_INFO_TX_TS_CNT_GET_(reg_val)	((reg_val & 0x00000070) >> 4)
+#define PTP_RX_PARSE_CONFIG			(0x0A64)
+#define PTP_RX_TIMESTAMP_CONFIG			(0x0A68)
+
+#define PTP_RX_INGRESS_SEC			(0x0A78)
+#define PTP_RX_INGRESS_NS			(0x0A7C)
+#define PTP_RX_MSG_HEADER			(0x0A80)
+#define PTP_TX_PARSE_CONFIG			(0x0A9C)
+#define PTP_TX_TIMESTAMP_CONFIG			(0x0AA0)
+#define PTP_TX_MOD				(0x0AA4)
+#define PTP_TX_MOD2				(0x0AA8)
+#define PTP_TX_EGRESS_SEC			(0x0AAC)
+#define PTP_TX_EGRESS_NS			(0x0AB0)
+#define PTP_TX_EGRESS_NS_CAPTURE_CAUSE_MASK_	(0xC0000000)
+#define PTP_TX_EGRESS_NS_CAPTURE_CAUSE_AUTO_	(0x00000000)
+#define PTP_TX_EGRESS_NS_CAPTURE_CAUSE_SW_	(0x40000000)
+#define PTP_TX_EGRESS_NS_TS_NS_MASK_		(0x3FFFFFFF)
+#define PTP_TX_MSG_HEADER			(0x0AB4)
+#define PTP_TX_ONE_STEP_SYNC_SEC		(0x0AC0)
+#define PTP_GPIO_CAP_CONFIG			(0x0AC4)
+#define PTP_GPIO_RE_CLOCK_SEC_CAP		(0x0AC8)
+#define PTP_GPIO_RE_CLOCK_NS_CAP		(0x0ACC)
+#define PTP_GPIO_FE_CLOCK_SEC_CAP		(0x0AD0)
+#define PTP_GPIO_FE_CLOCK_NS_CAP		(0x0AD4)
+
+#define DMAC_CFG				(0xC00)
+#define DMAC_CFG_INTR_DSCR_RD_EN_		BIT(18)
+#define DMAC_CFG_INTR_DSCR_WR_EN_		BIT(17)
+#define DMAC_CFG_COAL_EN_			BIT(16)
+#define DMAC_CFG_CMPL_RETRY_CNT_MASK_		(0x00006000)
+#define DMAC_CFG_CMPL_RETRY_EN_			BIT(12)
+#define DMAC_CFG_CH_ARB_SEL_MASK_		(0x00000C00)
+#define DMAC_CFG_CH_ARB_SEL_RX_HIGH_		(0x00000000)
+#define DMAC_CFG_CH_ARB_SEL_CH_ORDER_		BIT(10)
+#define DMAC_CFG_CH_ARB_SEL_RX_HIGH_RR_		BIT(11)
+#define DMAC_CFG_CH_ARB_SEL_RR_			(0x00000C00)
+#define DMAC_CFG_MAX_READ_REQ_MASK_		(0x00000070)
+#define DMAC_CFG_MAX_READ_REQ_SET_(val) \
+	((((u32)(val)) << 4) & DMAC_CFG_MAX_READ_REQ_MASK_)
+#define DMAC_CFG_MAX_DSPACE_MASK_		(0x00000003)
+#define DMAC_CFG_MAX_DSPACE_16_			(0x00000000)
+#define DMAC_CFG_MAX_DSPACE_32_			(0x00000001)
+#define DMAC_CFG_MAX_DSPACE_64_			BIT(1)
+#define DMAC_CFG_MAX_DSPACE_128_		(0x00000003)
+
+#define DMAC_COAL_CFG				(0xC04)
+#define DMAC_COAL_CFG_TIMER_LIMIT_MASK_		(0xFFF00000)
+#define DMAC_COAL_CFG_FLUSH_INTS_		BIT(18)
+#define DMAC_COAL_CFG_INT_EXIT_COAL_		BIT(17)
+#define DMAC_COAL_CFG_CSR_EXIT_COAL_		BIT(16)
+#define DMAC_COAL_CFG_TX_THRES_MASK_		(0x0000FF00)
+#define DMAC_COAL_CFG_RX_THRES_MASK_		(0x000000FF)
+
+#define DMAC_OBFF_CFG				(0xC08)
+#define DMAC_OBFF_TX_THRES_MASK_		(0x0000FF00)
+#define DMAC_OBFF_RX_THRES_MASK_		(0x000000FF)
+
+#define DMAC_CMD				(0xC0C)
+#define DMAC_CMD_SWR_				BIT(31)
+#define DMAC_CMD_COAL_EXIT_			BIT(28)
+#define DMAC_CMD_TX_SWR_(channel)		BIT(24 + (channel))
+#define DMAC_CMD_START_T_(channel)		BIT(20 + (channel))
+#define DMAC_CMD_STOP_T_(channel)		BIT(16 + (channel))
+#define DMAC_CMD_RX_SWR_(channel)		BIT(8 + (channel))
+#define DMAC_CMD_START_R_(channel)		BIT(4 + (channel))
+#define DMAC_CMD_STOP_R_(channel)		BIT(0 + (channel))
+
+#define DMAC_INT_STS				(0xC10)
+#define DMAC_INT_EN_SET				(0xC14)
+#define DMAC_INT_EN_CLR				(0xC18)
+#define DMAC_INT_BIT_RXPRI_(channel)		BIT(24 + (channel))
+#define DMAC_INT_BIT_ERR_			BIT(21)
+#define DMAC_INT_BIT_RXFRM_(channel)		BIT(16 + (channel))
+#define DMAC_INT_BIT_RX_STOP_(channel)		BIT(12 + (channel))
+#define DMAC_INT_BIT_TX_STOP_(channel)		BIT(8 + (channel))
+#define DMAC_INT_BIT_TX_IOC_(channel)		BIT(0 + (channel))
+
+#define DMAC_RX_ABS_TIMER_CFG			(0xC1C)
+#define DMAC_RX_ABS_TIMER_CFG_SHARE_MASK_	(0x00F00000)
+#define DMAC_RX_ABS_TIMER_CFG_SHARE_3_		BIT(23)
+#define DMAC_RX_ABS_TIMER_CFG_SHARE_2_		BIT(22)
+#define DMAC_RX_ABS_TIMER_CFG_SHARE_1_		BIT(21)
+#define DMAC_RX_ABS_TIMER_CFG_SHARE_0_		BIT(20)
+#define DMAC_RX_ABS_TIMER_CFG_WR_		BIT(19)
+#define DMAC_RX_ABS_TIMER_CFG_SEL_MASK_		(0x00070000)
+#define DMAC_RX_ABS_TIMER_CFG_CNT_MASK_		(0x0000FFFF)
+
+#define DMAC_RX_TIMER_CFG				(0xC20)
+#define DMAC_RX_TIMER_CFG_TMR_MODE_MASK_		(0x1F000000)
+#define DMAC_RX_TIMER_CFG_TMR_SHARED_FRAME_MODE_	BIT(28)
+#define DMAC_RX_TIMER_CFG_TMR_TIMER3_FRAME_MODE_	BIT(27)
+#define DMAC_RX_TIMER_CFG_TMR_TIMER2_FRAME_MODE_	BIT(26)
+#define DMAC_RX_TIMER_CFG_TMR_TIMER1_FRAME_MODE_	BIT(25)
+#define DMAC_RX_TIMER_CFG_TMR_TIMER0_FRAME_MODE_	BIT(24)
+#define DMAC_RX_TIMER_CFG_SHARE_MAP_MASK_		(0x00F00000)
+#define DMAC_RX_TIMER_CFG_SHARE_MAP_TIMER3_		BIT(23)
+#define DMAC_RX_TIMER_CFG_SHARE_MAP_TIMER2_		BIT(22)
+#define DMAC_RX_TIMER_CFG_SHARE_MAP_TIMER1_		BIT(21)
+#define DMAC_RX_TIMER_CFG_SHARE_MAP_TIMER0_		BIT(20)
+#define DMAC_RX_TIMER_CFG_WR_				BIT(19)
+#define DMAC_RX_TIMER_CFG_CH_SEL_MASK_			(0x00070000)
+#define DMAC_RX_TIMER_CFG_CH_SEL_TIMER0_		(0x00000000)
+#define DMAC_RX_TIMER_CFG_CH_SEL_TIMER1_		(0x00010000)
+#define DMAC_RX_TIMER_CFG_CH_SEL_TIMER2_		(0x00020000)
+#define DMAC_RX_TIMER_CFG_CH_SEL_TIMER3_		(0x00030000)
+#define DMAC_RX_TIMER_CFG_CH_SEL_SHARED_		(0x00040000)
+#define DMAC_RX_TIMER_CFG_CNT_MASK_			(0x0000FFFF)
+
+#define DMAC_TXTMR_CFG				(0xC24)
+#define DMAC_TXTMR_CFG_TX_DELAY_WR_		BIT(23)
+#define DMAC_TXTMR_CFG_TX_DELAY_CNT_		(0x0000FFFF)
+
+#define DMAC_TX_ABSTMR_CFG		(0xC28)
+#define DMAC_TX_ABSTMR_WR_		BIT(23)
+#define DMAC_TX_ABSTMR_CNT_		(0x0000FFFF)
+
+#define RX_CFG_A(channel)			(0xC40 + ((channel) << 6))
+#define RX_CFG_A_RX_WB_SWFLUSH_			BIT(31)
+#define RX_CFG_A_RX_WB_ON_INT_TMR_		BIT(30)
+#define RX_CFG_A_RX_WB_THRES_MASK_		(0x1F000000)
+#define RX_CFG_A_RX_PF_THRES_MASK_		(0x001F0000)
+#define RX_CFG_A_RX_PF_PRI_THRES_MASK_		(0x00001F00)
+#define RX_CFG_A_RX_HP_WB_EN_			BIT(5)
+#define RX_CFG_A_RX_HP_WB_THRES_MASK_		(0x0000000F)
+
+#define RX_CFG_B(channel)			(0xC44 + ((channel) << 6))
+#define RX_CFG_B_TS_ALL_RX_			BIT(29)
+#define RX_CFG_B_TS_DECR_EN_			BIT(28)
+#define RX_CFG_B_RX_PAD_MASK_			(0x03000000)
+#define RX_CFG_B_RX_PAD_0_			(0x00000000)
+#define RX_CFG_B_RX_PAD_2_			(0x02000000)
+#define RX_CFG_B_RX_COAL_DIS_			BIT(23)
+#define RX_CFG_B_RX_DESCR_RO_EN_		BIT(21)
+#define RX_CFG_B_RX_DATA_RO_EN_			BIT(20)
+#define RX_CFG_B_RDMABL_MASK_			(0x00070000)
+#define RX_CFG_B_RDMABL_32_			(0x00000000)
+#define RX_CFG_B_RDMABL_64_			(0x00010000)
+#define RX_CFG_B_RDMABL_128_			(0x00020000)
+#define RX_CFG_B_RDMABL_256_			(0x00030000)
+#define RX_CFG_B_RDMABL_512_			(0x00040000)
+#define RX_CFG_B_RDMABL_1024_			(0x00050000)
+#define RX_CFG_B_RDMABL_2048_			(0x00060000)
+#define RX_CFG_B_RDMABL_4096_			(0x00070000)
+#define RX_CFG_B_RX_RING_LEN_MASK_		(0x0000FFFF)
+
+#define RX_BASE_ADDRH(channel)			(0xC48 + ((channel) << 6))
+#define RX_BASE_ADDRH_MASK_			(0xFFFFFFFF)
+
+#define RX_BASE_ADDRL(channel)			(0xC4C + ((channel) << 6))
+#define RX_BASE_ADDRL_MASK_			(0xFFFFFFFC)
+
+#define RX_HEAD_WRITEBACK_ADDRH(channel)	(0xC50 + ((channel) << 6))
+
+#define RX_HEAD_WRITEBACK_ADDRL(channel)	(0xC54 + ((channel) << 6))
+
+#define RX_HEAD(channel)			(0xC58 + ((channel) << 6))
+#define RX_HEAD_MASK_				(0x0000FFFF)
+
+#define RX_TAIL(channel)			(0xC5C + ((channel) << 6))
+#define RX_TAIL_MASK_				(0x0000FFFF)
+
+#define DMAC_RX_ERR_STS(channel)		(0xC60 + ((channel) << 6))
+#define DMAC_RX_ERR_STS_RESERVED_		(0xFFDFFF9F)
+#define DMAC_RX_ERR_STS_RX_DESC_TAIL_ERR_EN_	BIT(21)
+#define DMAC_RX_ERR_STS_RX_DESC_READ_ERR_	BIT(6)
+#define DMAC_RX_ERR_STS_RX_DESC_TAIL_ERR_	BIT(5)
+
+#define TX_CFG_A(channel)			(0xD40 + ((channel) << 6))
+#define TX_CFG_A_TX_HP_WB_SWFLUSH_		BIT(31)
+#define TX_CFG_A_TX_HP_WB_ON_INT_TMR_		BIT(30)
+#define TX_CFG_A_TX_TMR_HPWB_SEL_MASK_		(0x30000000)
+#define TX_CFG_A_TX_TMR_HPWB_SEL_DIS_		(0x00000000)
+#define TX_CFG_A_TX_TMR_HPWB_SEL_IOC_		(0x10000000)
+#define TX_CFG_A_TX_TMR_HPWB_SEL_LS_		(0x20000000)
+#define TX_CFG_A_TX_TMR_HPWB_SEL_IOC_LS_	(0x30000000)
+#define TX_CFG_A_TX_PF_THRES_MASK_		(0x001F0000)
+#define TX_CFG_A_TX_PF_PRI_THRES_MASK_		(0x00001F00)
+#define TX_CFG_A_TX_STOP_TXE_			BIT(7)
+#define TX_CFG_A_TX_HP_WB_EN_			BIT(5)
+#define TX_CFG_A_TX_HP_WB_ON_TXTMR_		BIT(4)
+#define TX_CFG_A_TX_HP_WB_THRES_MASK_		(0x0000000F)
+
+#define TX_CFG_B(channel)			(0xD44 + ((channel) << 6))
+#define TX_CFG_B_TX_COAL_DIS_			BIT(23)
+#define TX_CFG_B_TX_DESC_RO_EN_			BIT(22)
+#define TX_CFG_B_TX_DATA_RO_EN_			BIT(21)
+#define TX_CFG_B_TX_HEAD_RO_EN_			BIT(20)
+#define TX_CFG_B_TDMABL_MASK_			(0x00070000)
+#define TX_CFG_B_TDMABL_32_			(0x00000000)
+#define TX_CFG_B_TDMABL_64_			(0x00010000)
+#define TX_CFG_B_TDMABL_128_			(0x00020000)
+#define TX_CFG_B_TDMABL_256_			(0x00030000)
+#define TX_CFG_B_TDMABL_512_			(0x00040000)
+#define TX_CFG_B_TX_RING_LEN_MASK_		(0x0000FFFF)
+
+#define TX_BASE_ADDRH(channel)			(0xD48 + ((channel) << 6))
+#define TX_BASE_ADDRH_MASK_			(0xFFFFFFFF)
+
+#define TX_BASE_ADDRL(channel)			(0xD4C + ((channel) << 6))
+#define TX_BASE_ADDRL_MASK_			(0xFFFFFFFC)
+
+#define TX_HEAD_WRITEBACK_ADDRH(channel)	(0xD50 + ((channel) << 6))
+#define TX_HEAD_WRITEBACK_ADDRH_MASK_		(0xFFFFFFFF)
+
+#define TX_HEAD_WRITEBACK_ADDRL(channel)	(0xD54 + ((channel) << 6))
+#define TX_HEAD_WRITEBACK_ADDRL_MASK_		(0xFFFFFFFC)
+
+#define TX_HEAD(channel)			(0xD58 + ((channel) << 6))
+#define TX_HEAD_MASK_				(0x0000FFFF)
+
+#define TX_TAIL(channel)			(0xD5C + ((channel) << 6))
+#define TX_TAIL_MASK_				(0x0000FFFF)
+
+#define DMAC_TX_ERR_STS(channel)		(0xD60 + ((channel) << 6))
+#define DMAC_TX_ERR_STS_RESERVED_		(0xFFDEFF00)
+#define DMAC_TX_ERR_STS_TX_DESC_TAIL_ERR_EN_	BIT(21)
+#define DMAC_TX_ERR_STS_TX_DESC_SEQ_ERR_EN_	BIT(16)
+#define DMAC_TX_ERR_STS_TX_DATA_READ_ERR_	BIT(7)
+#define DMAC_TX_ERR_STS_TX_DESC_READ_ERR_	BIT(6)
+#define DMAC_TX_ERR_STS_TX_DESC_TAIL_ERR_	BIT(5)
+#define DMAC_TX_ERR_STS_TX_FCT_TXE_		BIT(4)
+#define DMAC_TX_ERR_STS_TX_DESC_DATATYPE_ERR_	BIT(3)
+#define DMAC_TX_ERR_STS_TX_DESC_EXTNTYPE_ERR_	BIT(2)
+#define DMAC_TX_ERR_STS_TX_DESC_EXTRAFS_ERR_	BIT(1)
+#define DMAC_TX_ERR_STS_TX_DESC_NOFS_ERR_	BIT(0)
+
+#define DMAC_DEBUG_0	(0xFF0)
+#define DMAC_DEBUG_1	(0xFF4)
+#define DMAC_DEBUG_2	(0xFF8)
+
+/* MAC statistics registers */
+#define STAT_RX_FCS_ERRORS			(0x1200)
+#define STAT_RX_ALIGNMENT_ERRORS		(0x1204)
+#define STAT_RX_FRAGMENT_ERRORS			(0x1208)
+#define STAT_RX_JABBER_ERRORS			(0x120C)
+#define STAT_RX_UNDERSIZE_FRAME_ERRORS		(0x1210)
+#define STAT_RX_OVERSIZE_FRAME_ERRORS		(0x1214)
+#define STAT_RX_DROPPED_FRAMES			(0x1218)
+#define STAT_RX_UNICAST_BYTE_COUNT		(0x121C)
+#define STAT_RX_BROADCAST_BYTE_COUNT		(0x1220)
+#define STAT_RX_MULTICAST_BYTE_COUNT		(0x1224)
+#define STAT_RX_UNICAST_FRAMES			(0x1228)
+#define STAT_RX_BROADCAST_FRAMES		(0x122C)
+#define STAT_RX_MULTICAST_FRAMES		(0x1230)
+#define STAT_RX_PAUSE_FRAMES			(0x1234)
+#define STAT_RX_64_BYTE_FRAMES			(0x1238)
+#define STAT_RX_65_127_BYTE_FRAMES		(0x123C)
+#define STAT_RX_128_255_BYTE_FRAMES		(0x1240)
+#define STAT_RX_256_511_BYTES_FRAMES		(0x1244)
+#define STAT_RX_512_1023_BYTE_FRAMES		(0x1248)
+#define STAT_RX_1024_1518_BYTE_FRAMES		(0x124C)
+#define STAT_RX_GREATER_1518_BYTE_FRAMES	(0x1250)
+#define STAT_RX_TOTAL_FRAMES			(0x1254)
+#define STAT_EEE_RX_LPI_TRANSITIONS		(0x1258)
+#define STAT_EEE_RX_LPI_TIME			(0x125C)
+#define STAT_RX_COUNTER_ROLLOVER_STATUS		(0x127C)
+
+#define STAT_TX_FCS_ERRORS			(0x1280)
+#define STAT_TX_EXCESS_DEFERRAL_ERRORS		(0x1284)
+#define STAT_TX_CARRIER_ERRORS			(0x1288)
+#define STAT_TX_BAD_BYTE_COUNT			(0x128C)
+#define STAT_TX_SINGLE_COLLISIONS		(0x1290)
+#define STAT_TX_MULTIPLE_COLLISIONS		(0x1294)
+#define STAT_TX_EXCESSIVE_COLLISION		(0x1298)
+#define STAT_TX_LATE_COLLISIONS			(0x129C)
+#define STAT_TX_UNICAST_BYTE_COUNT		(0x12A0)
+#define STAT_TX_BROADCAST_BYTE_COUNT		(0x12A4)
+#define STAT_TX_MULTICAST_BYTE_COUNT		(0x12A8)
+#define STAT_TX_UNICAST_FRAMES			(0x12AC)
+#define STAT_TX_BROADCAST_FRAMES		(0x12B0)
+#define STAT_TX_MULTICAST_FRAMES		(0x12B4)
+#define STAT_TX_PAUSE_FRAMES			(0x12B8)
+#define STAT_TX_64_BYTE_FRAMES			(0x12BC)
+#define STAT_TX_65_127_BYTE_FRAMES		(0x12C0)
+#define STAT_TX_128_255_BYTE_FRAMES		(0x12C4)
+#define STAT_TX_256_511_BYTES_FRAMES		(0x12C8)
+#define STAT_TX_512_1023_BYTE_FRAMES		(0x12CC)
+#define STAT_TX_1024_1518_BYTE_FRAMES		(0x12D0)
+#define STAT_TX_GREATER_1518_BYTE_FRAMES	(0x12D4)
+#define STAT_TX_TOTAL_FRAMES			(0x12D8)
+#define STAT_EEE_TX_LPI_TRANSITIONS		(0x12DC)
+#define STAT_EEE_TX_LPI_TIME			(0x12E0)
+#define STAT_TX_COUNTER_ROLLOVER_STATUS		(0x12FC)
+
+/* End of Register definitions */
+
+#define LAN743X_NUMBER_OF_TX_CHANNELS	(1)
+#define LAN743X_NUMBER_OF_RX_CHANNELS	(4)
+#define LAN743X_PHY_TRACE_ENABLE	(0)
+struct lan743x_adapter;
+
+#define NETIF_INFO(adapter, type, netdev, fmt, ...) \
+	netif_info(adapter, type, netdev, "%s.INFO: " fmt "\n", \
+	__func__, ##__VA_ARGS__)
+#define NETIF_WARNING(adapter, type, netdev, fmt, ...) \
+	netif_warn(adapter, type, netdev, "%s.WARNING: " fmt "\n", \
+	__func__, ##__VA_ARGS__)
+#define NETIF_ERROR(adapter, type, netdev, fmt, ...) \
+	netif_err(adapter, type, netdev, "%s.ERROR: " fmt "\n", \
+	__func__, ##__VA_ARGS__)
+#define NETIF_ASSERT(adapter, type, netdev, condition) \
+	do { if (!(condition)) netif_err(adapter, type, netdev, \
+	"ASSERTION_FAILURE, File = %s, Line = %d\n", \
+	__FILE__, __LINE__); } while (0)
+
+/* PCI */
+/* SMSC acquired EFAR late 1990's, MCHP acquired SMSC 2012 */
+#define PCI_VENDOR_ID_SMSC		PCI_VENDOR_ID_EFAR
+#define PCI_DEVICE_ID_SMSC_LAN7430	(0x7430)
+
+#define PCI_CONFIG_LENGTH		(0x1000)
+
+struct lan743x_pci {
+	struct pci_dev *pdev;
+	int init_flags;
+	unsigned long bar_flags;
+};
+
+static int lan743x_pci_init(struct lan743x_adapter *adapter,
+			    struct pci_dev *pdev);
+static void lan743x_pci_cleanup(struct lan743x_adapter *adapter);
+static u8 __iomem *lan743x_pci_get_bar_address(struct lan743x_adapter *adapter,
+					       int bar);
+static void lan743x_pci_release_bar_address(struct lan743x_adapter *adapter,
+					    int bar, u8 __iomem *bar_address);
+static unsigned int lan743x_pci_get_irq(struct lan743x_adapter *adapter);
+
+/* CSR */
+#define CSR_LENGTH					(0x2000)
+
+struct lan743x_csr {
+	u8 __iomem *csr_address;
+	u32 id_rev;
+	u32 fpga_rev;
+};
+
+static int lan743x_csr_init(struct lan743x_adapter *adapter);
+static void lan743x_csr_cleanup(struct lan743x_adapter *adapter);
+static int lan743x_csr_light_reset(struct lan743x_adapter *adapter);
+static inline u32 lan743x_csr_read(struct lan743x_adapter *adapter, int offset);
+static inline void lan743x_csr_write(struct lan743x_adapter *adapter,
+				     int offset, u32 data);
+
+/* INTERRUPTS */
+typedef void(*lan743x_vector_handler)(void *context, u32 int_sts);
+
+struct lan743x_vector {
+	struct lan743x_adapter	*adapter;
+	int			vector_index;
+	int			irq;
+	u32			int_mask;
+	lan743x_vector_handler	handler;
+	void			*context;
+};
+
+#define LAN743X_MAX_VECTOR_COUNT	(6)
+
+struct lan743x_intr {
+	int			flags;
+
+	unsigned int		irq;
+
+	struct msix_entry	msix_entries[LAN743X_MAX_VECTOR_COUNT];
+
+	struct lan743x_vector	vector_list[LAN743X_MAX_VECTOR_COUNT];
+	int			number_of_vectors;
+
+	int			software_isr_flag;
+};
+
+static void lan743x_vector_init(struct lan743x_vector *vector,
+				struct lan743x_adapter *adapter,
+				int vector_index, int irq, u32 int_mask,
+				lan743x_vector_handler handler, void *context);
+
+static int lan743x_intr_init(struct lan743x_adapter *adapter);
+static void lan743x_intr_cleanup(struct lan743x_adapter *adapter);
+static int lan743x_intr_open(struct lan743x_adapter *adapter);
+static void lan743x_intr_close(struct lan743x_adapter *adapter);
+
+/* DP */
+struct lan743x_dp {
+	int		flags;
+
+	/* lock, used to prevent concurrent access to data port */
+	struct mutex	lock;
+};
+
+static int lan743x_dp_init(struct lan743x_adapter *adapter);
+static void lan743x_dp_cleanup(struct lan743x_adapter *adapter);
+static int lan743x_dp_open(struct lan743x_adapter *adapter);
+static void lan743x_dp_close(struct lan743x_adapter *adapter);
+
+static int lan743x_dp_write_hash_filter(
+	struct lan743x_adapter *adapter,
+	u32 *hash_data);
+
+/* GPIO */
+struct lan743x_gpio {
+	/* gpio_lock: used to prevent concurrent access to gpio settings */
+	spinlock_t gpio_lock;
+
+	int used_bits;
+	int output_bits;
+	int ptp_bits;
+	u32 gpio_cfg0;
+	u32 gpio_cfg1;
+	u32 gpio_cfg2;
+	u32 gpio_cfg3;
+};
+
+static int lan743x_gpio_init(struct lan743x_adapter *adapter);
+static void lan743x_gpio_cleanup(struct lan743x_adapter *adapter);
+static int lan743x_gpio_open(struct lan743x_adapter *adapter);
+static void lan743x_gpio_close(struct lan743x_adapter *adapter);
+
+/* PTP */
+#include "linux/ptp_clock_kernel.h"
+
+#define LAN743X_PTP_NUMBER_OF_TX_TIMESTAMPS (4)
+
+#define PTP_FLAG_PTP_CLOCK_REGISTERED	BIT(1)
+#define PTP_FLAG_ISR_ENABLED			BIT(2)
+
+struct lan743x_ptp {
+	int flags;
+
+	/* command_lock: used to prevent concurrent ptp commands */
+	struct mutex	command_lock;
+
+#ifdef CONFIG_PTP_1588_CLOCK
+	struct ptp_clock *ptp_clock;
+	struct ptp_clock_info ptp_clock_info;
+	struct ptp_pin_desc pin_config[1];
+#endif /* CONFIG_PTP_1588_CLOCK */
+
+	struct tasklet_struct	ptp_isr_bottom_half;
+
+#define LAN743X_PTP_NUMBER_OF_EVENT_CHANNELS (2)
+	unsigned long used_event_ch;
+
+	int pps_event_ch;
+	int pps_gpio_bit;
+
+	/* tx_ts_lock: used to prevent concurrent access to timestamp arrays */
+	struct mutex	tx_ts_lock;
+	int pending_tx_timestamps;
+	struct sk_buff *tx_ts_skb_queue[
+		LAN743X_PTP_NUMBER_OF_TX_TIMESTAMPS];
+	int tx_ts_skb_queue_size;
+	u32 tx_ts_seconds_queue[
+		LAN743X_PTP_NUMBER_OF_TX_TIMESTAMPS];
+	u32 tx_ts_nseconds_queue[
+		LAN743X_PTP_NUMBER_OF_TX_TIMESTAMPS];
+	int tx_ts_queue_size;
+};
+
+static void lan743x_ptp_isr(void *context);
+
+static int lan743x_ptp_init(struct lan743x_adapter *adapter);
+static void lan743x_ptp_cleanup(struct lan743x_adapter *adapter);
+static int lan743x_ptp_open(struct lan743x_adapter *adapter);
+static void lan743x_ptp_close(struct lan743x_adapter *adapter);
+
+static bool lan743x_ptp_is_enabled(struct lan743x_adapter *adapter);
+static void lan743x_ptp_enable(struct lan743x_adapter *adapter);
+static void lan743x_ptp_disable(struct lan743x_adapter *adapter);
+static void lan743x_ptp_reset(struct lan743x_adapter *adapter);
+
+#ifdef CONFIG_PTP_1588_CLOCK
+static void lan743x_ptp_clock_get(struct lan743x_adapter *adapter,
+				  u32 *seconds, u32 *nano_seconds,
+				  u32 *sub_nano_seconds);
+#endif /* CONFIG_PTP_1588_CLOCK */
+
+static void lan743x_ptp_clock_set(struct lan743x_adapter *adapter,
+				  u32 seconds, u32 nano_seconds,
+				  u32 sub_nano_seconds);
+
+#ifdef CONFIG_PTP_1588_CLOCK
+static void lan743x_ptp_clock_step(struct lan743x_adapter *adapter,
+				   s64 time_step_ns);
+#endif /* CONFIG_PTP_1588_CLOCK */
+
+static bool lan743x_ptp_request_tx_timestamp(struct lan743x_adapter *adapter);
+static void lan743x_ptp_tx_timestamp_skb(struct lan743x_adapter *adapter,
+					 struct sk_buff *skb);
+
+#ifdef CONFIG_PTP_1588_CLOCK
+static int lan743x_ptp_get_clock_index(struct lan743x_adapter *adapter);
+#endif
+
+/* MAC */
+struct lan743x_mac {
+	int	flags;
+
+	struct mii_bus	*mdiobus;
+	/* mii_mutex: used to prevent concurrent access to mdiobus */
+	struct mutex	mii_mutex;
+
+	u8	mac_address[ETH_ALEN];
+
+	/* tx_mutext: used to prevent concurrent access to tx_enable_bits */
+	struct mutex tx_mutex;
+	unsigned long tx_enable_bits;
+
+	/* rx_mutex: used to prevent concurrent access to rx_enable_bits */
+	struct mutex rx_mutex;
+	unsigned long rx_enable_bits;
+
+	struct net_device_stats statistics;
+};
+
+#define LAN743X_MAX_FRAME_SIZE			(9 * 1024)
+
+static void lan743x_mac_isr(void *context);
+
+static int lan743x_mac_init(struct lan743x_adapter *adapter);
+static void lan743x_mac_cleanup(struct lan743x_adapter *adapter);
+static int lan743x_mac_open(struct lan743x_adapter *adapter);
+static void lan743x_mac_close(struct lan743x_adapter *adapter);
+
+static void lan743x_mac_get_address(struct lan743x_adapter *adapter,
+				    u8 *mac_addr);
+
+static int lan743x_mac_mii_read(struct lan743x_adapter *adapter,
+				int phy_id, int index);
+static int lan743x_mac_mii_write(struct lan743x_adapter *adapter,
+				 int phy_id, int index, u16 regval);
+
+static void lan743x_mac_flow_ctrl_set_enables(struct lan743x_adapter *adapter,
+					      bool tx_enable, bool rx_enable);
+
+static int lan743x_mac_tx_enable(struct lan743x_adapter *adapter,
+				 int tx_channel);
+static int lan743x_mac_tx_disable(struct lan743x_adapter *adapter,
+				  int tx_channel);
+static int lan743x_mac_rx_enable(struct lan743x_adapter *adapter,
+				 int rx_channel);
+static int lan743x_mac_rx_disable(struct lan743x_adapter *adapter,
+				  int rx_channel);
+static int lan743x_mac_set_mtu(struct lan743x_adapter *adapter, int new_mtu);
+
+static struct net_device_stats *mac_get_stats(struct lan743x_adapter *adapter);
+
+/* PHY */
+struct lan743x_phy {
+	int	flags;
+
+	bool	fc_autoneg;
+	u8	fc_request_control;
+};
+
+static int lan743x_phy_init(struct lan743x_adapter *adapter);
+static void lan743x_phy_cleanup(struct lan743x_adapter *adapter);
+static int lan743x_phy_open(struct lan743x_adapter *adapter);
+static void lan743x_phy_close(struct lan743x_adapter *adapter);
+
+/* RFE */
+struct lan743x_rfe {
+	int	flags;
+};
+
+static int lan743x_rfe_init(struct lan743x_adapter *adapter);
+static void lan743x_rfe_cleanup(struct lan743x_adapter *adapter);
+static int lan743x_rfe_open(struct lan743x_adapter *adapter);
+static void lan743x_rfe_close(struct lan743x_adapter *adapter);
+
+static void lan743x_rfe_set_multicast(struct lan743x_adapter *adapter);
+
+/* FCT */
+
+static void lan743x_fct_isr(void *context);
+
+static int lan743x_fct_init(struct lan743x_adapter *adapter);
+static void lan743x_fct_cleanup(struct lan743x_adapter *adapter);
+static int lan743x_fct_open(struct lan743x_adapter *adapter);
+static void lan743x_fct_close(struct lan743x_adapter *adapter);
+
+static int lan743x_fct_rx_reset(struct lan743x_adapter *adapter,
+				int rx_channel);
+static int lan743x_fct_rx_enable(struct lan743x_adapter *adapter,
+				 int rx_channel);
+static int lan743x_fct_rx_disable(struct lan743x_adapter *adapter,
+				  int rx_channel);
+
+static int lan743x_fct_tx_reset(struct lan743x_adapter *adapter,
+				int tx_channel);
+static int lan743x_fct_tx_enable(struct lan743x_adapter *adapter,
+				 int tx_channel);
+static int lan743x_fct_tx_disable(struct lan743x_adapter *adapter,
+				  int tx_channel);
+
+/* DMAC */
+struct lan743x_dmac {
+	int flags;
+
+	int descriptor_spacing;
+};
+
+static void lan743x_dmac_isr(void *context);
+
+static int lan743x_dmac_init(struct lan743x_adapter *adapter);
+static void lan743x_dmac_cleanup(struct lan743x_adapter *adapter);
+static int lan743x_dmac_open(struct lan743x_adapter *adapter);
+static void lan743x_dmac_close(struct lan743x_adapter *adapter);
+
+static int lan743x_dmac_get_descriptor_spacing(struct lan743x_adapter *adapter);
+
+static int lan743x_dmac_reserve_tx_channel(struct lan743x_adapter *adapter,
+					   int tx_channel);
+static void lan743x_dmac_release_tx_channel(struct lan743x_adapter *adapter,
+					    int tx_channel);
+static int lan743x_dmac_reserve_rx_channel(struct lan743x_adapter *adapter,
+					   int rx_channel);
+static void lan743x_dmac_release_rx_channel(struct lan743x_adapter *adapter,
+					    int rx_channel);
+static int lan743x_dmac_tx_reset(struct lan743x_adapter *adapter,
+				 int tx_channel);
+static int lan743x_dmac_tx_start(struct lan743x_adapter *adapter,
+				 int tx_channel);
+static int lan743x_dmac_tx_stop(struct lan743x_adapter *adapter,
+				int tx_channel);
+static int lan743x_dmac_rx_reset(struct lan743x_adapter *adapter,
+				 int rx_channel);
+static int lan743x_dmac_rx_start(struct lan743x_adapter *adapter,
+				 int rx_channel);
+static int lan743x_dmac_rx_stop(struct lan743x_adapter *adapter,
+				int rx_channel);
+
+/* TX */
+struct lan743x_tx_descriptor;
+struct lan743x_tx_buffer_info;
+
+#define TX_FLAG_MAC_ENABLED		BIT(1)
+#define TX_FLAG_FIFO_ENABLED		BIT(2)
+#define TX_FLAG_ISR_ENABLED		BIT(3)
+#define TX_FLAG_DMAC_STARTED		BIT(4)
+#define TX_FLAG_GPIO0_RESERVED		BIT(5)
+#define TX_FLAG_GPIO1_RESERVED		BIT(6)
+#define TX_FLAG_GPIO2_RESERVED		BIT(7)
+#define TX_FLAG_GPIO3_RESERVED		BIT(8)
+#define TX_FLAG_TIMESTAMPING_ENABLED	BIT(9)
+#define TX_FLAG_RING_ALLOCATED		BIT(10)
+
+#define GPIO_QUEUE_STARTED		(0)
+#define GPIO_TX_FUNCTION		(1)
+#define GPIO_TX_COMPLETION		(2)
+#define GPIO_TX_FRAGMENT		(3)
+
+#define TX_FRAME_FLAG_IN_PROGRESS	BIT(0)
+
+struct lan743x_tx {
+	struct lan743x_adapter *adapter;
+	int	flags;
+	int	channel_number;
+
+	int	ring_size;
+	size_t	ring_allocation_size;
+	struct lan743x_tx_descriptor *ring_cpu_ptr;
+	dma_addr_t ring_dma_ptr;
+	/* ring_lock: used to prevent concurrent access to tx ring */
+	spinlock_t ring_lock;
+	u32		frame_flags;
+	u32		frame_first;
+	u32		frame_data0;
+	u32		frame_tail;
+
+	struct lan743x_tx_buffer_info *buffer_info;
+
+	u32		*head_cpu_ptr;
+	dma_addr_t	head_dma_ptr;
+	int		last_head;
+	int		last_tail;
+
+	struct tasklet_struct	tx_isr_bottom_half;
+
+	struct sk_buff *overflow_skb;
+};
+
+static void lan743x_tx_isr(void *context, u32 int_sts);
+
+static int lan743x_tx_ring_init(struct lan743x_tx *tx);
+static void lan743x_tx_ring_cleanup(struct lan743x_tx *tx);
+static int lan743x_tx_init(struct lan743x_tx *tx,
+			   struct lan743x_adapter *adapter,
+			   int channel_number);
+static void lan743x_tx_cleanup(struct lan743x_tx *tx);
+static int lan743x_tx_open(struct lan743x_tx *tx);
+static void lan743x_tx_close(struct lan743x_tx *tx);
+
+static void lan743x_tx_set_timestamping_enable(struct lan743x_tx *tx,
+					       bool enabled);
+
+static netdev_tx_t lan743x_tx_xmit_frame(struct lan743x_tx *tx,
+					 struct sk_buff *skb);
+
+/* RX */
+struct lan743x_rx_descriptor;
+struct lan743x_rx_buffer_info;
+
+#define RX_FLAG_NAPI_ADDED	BIT(0)
+#define RX_FLAG_DMAC_STARTED	BIT(1)
+#define RX_FLAG_ISR_ENABLED	BIT(2)
+#define RX_FLAG_FIFO_ENABLED	BIT(3)
+#define RX_FLAG_MAC_ENABLED	BIT(4)
+#define RX_FLAG_RING_ALLOCATED	BIT(5)
+
+struct lan743x_rx {
+	struct lan743x_adapter *adapter;
+	int	flags;
+	int	channel_number;
+
+	int	ring_size;
+	size_t	ring_allocation_size;
+	struct lan743x_rx_descriptor *ring_cpu_ptr;
+	dma_addr_t ring_dma_ptr;
+
+	struct lan743x_rx_buffer_info *buffer_info;
+
+	u32		*head_cpu_ptr;
+	dma_addr_t	head_dma_ptr;
+	u32		last_head;
+
+	struct napi_struct napi;
+};
+
+static void lan743x_rx_isr(void *context, u32 int_sts);
+
+static int lan743x_rx_ring_init(struct lan743x_rx *rx);
+static void lan743x_rx_ring_cleanup(struct lan743x_rx *rx);
+static int lan743x_rx_init(struct lan743x_rx *rx,
+			   struct lan743x_adapter *adapter, int channel_number);
+static void lan743x_rx_cleanup(struct lan743x_rx *rx);
+static int lan743x_rx_open(struct lan743x_rx *rx);
+static void lan743x_rx_close(struct lan743x_rx *rx);
+
+struct lan743x_adapter {
+	struct net_device       *netdev;
+	int                     init_flags;
+	int                     open_flags;
+
+	int                     msg_enable;
+
+	struct lan743x_pci      pci;
+	struct lan743x_csr      csr;
+	struct lan743x_intr     intr;
+	struct lan743x_dp       dp;
+	struct lan743x_gpio     gpio;
+	struct lan743x_ptp      ptp;
+	struct lan743x_mac      mac;
+	struct lan743x_phy      phy;
+	struct lan743x_rfe      rfe;
+	struct lan743x_dmac     dmac;
+	struct lan743x_tx       tx[LAN743X_NUMBER_OF_TX_CHANNELS];
+	struct lan743x_rx       rx[LAN743X_NUMBER_OF_RX_CHANNELS];
+};
+
+#endif /* _LAN743X_H */