Adding upstream version 6.1.76.upstream/6.1.76upstream

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

1 files changed, 2827 insertions, 0 deletions

diff --git a/drivers/net/ethernet/broadcom/bcm63xx_enet.c b/drivers/net/ethernet/broadcom/bcm63xx_enet.c
new file mode 100644
index 000000000..d91fdb0c2
--- /dev/null
+++ b/drivers/net/ethernet/broadcom/bcm63xx_enet.c
@@ -0,0 +1,2827 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Driver for BCM963xx builtin Ethernet mac
+ *
+ * Copyright (C) 2008 Maxime Bizon <mbizon@freebox.fr>
+ */
+#include <linux/init.h>
+#include <linux/interrupt.h>
+#include <linux/module.h>
+#include <linux/clk.h>
+#include <linux/etherdevice.h>
+#include <linux/slab.h>
+#include <linux/delay.h>
+#include <linux/ethtool.h>
+#include <linux/crc32.h>
+#include <linux/err.h>
+#include <linux/dma-mapping.h>
+#include <linux/platform_device.h>
+#include <linux/if_vlan.h>
+
+#include <bcm63xx_dev_enet.h>
+#include "bcm63xx_enet.h"
+
+static char bcm_enet_driver_name[] = "bcm63xx_enet";
+
+static int copybreak __read_mostly = 128;
+module_param(copybreak, int, 0);
+MODULE_PARM_DESC(copybreak, "Receive copy threshold");
+
+/* io registers memory shared between all devices */
+static void __iomem *bcm_enet_shared_base[3];
+
+/*
+ * io helpers to access mac registers
+ */
+static inline u32 enet_readl(struct bcm_enet_priv *priv, u32 off)
+{
+	return bcm_readl(priv->base + off);
+}
+
+static inline void enet_writel(struct bcm_enet_priv *priv,
+			       u32 val, u32 off)
+{
+	bcm_writel(val, priv->base + off);
+}
+
+/*
+ * io helpers to access switch registers
+ */
+static inline u32 enetsw_readl(struct bcm_enet_priv *priv, u32 off)
+{
+	return bcm_readl(priv->base + off);
+}
+
+static inline void enetsw_writel(struct bcm_enet_priv *priv,
+				 u32 val, u32 off)
+{
+	bcm_writel(val, priv->base + off);
+}
+
+static inline u16 enetsw_readw(struct bcm_enet_priv *priv, u32 off)
+{
+	return bcm_readw(priv->base + off);
+}
+
+static inline void enetsw_writew(struct bcm_enet_priv *priv,
+				 u16 val, u32 off)
+{
+	bcm_writew(val, priv->base + off);
+}
+
+static inline u8 enetsw_readb(struct bcm_enet_priv *priv, u32 off)
+{
+	return bcm_readb(priv->base + off);
+}
+
+static inline void enetsw_writeb(struct bcm_enet_priv *priv,
+				 u8 val, u32 off)
+{
+	bcm_writeb(val, priv->base + off);
+}
+
+
+/* io helpers to access shared registers */
+static inline u32 enet_dma_readl(struct bcm_enet_priv *priv, u32 off)
+{
+	return bcm_readl(bcm_enet_shared_base[0] + off);
+}
+
+static inline void enet_dma_writel(struct bcm_enet_priv *priv,
+				       u32 val, u32 off)
+{
+	bcm_writel(val, bcm_enet_shared_base[0] + off);
+}
+
+static inline u32 enet_dmac_readl(struct bcm_enet_priv *priv, u32 off, int chan)
+{
+	return bcm_readl(bcm_enet_shared_base[1] +
+		bcm63xx_enetdmacreg(off) + chan * priv->dma_chan_width);
+}
+
+static inline void enet_dmac_writel(struct bcm_enet_priv *priv,
+				       u32 val, u32 off, int chan)
+{
+	bcm_writel(val, bcm_enet_shared_base[1] +
+		bcm63xx_enetdmacreg(off) + chan * priv->dma_chan_width);
+}
+
+static inline u32 enet_dmas_readl(struct bcm_enet_priv *priv, u32 off, int chan)
+{
+	return bcm_readl(bcm_enet_shared_base[2] + off + chan * priv->dma_chan_width);
+}
+
+static inline void enet_dmas_writel(struct bcm_enet_priv *priv,
+				       u32 val, u32 off, int chan)
+{
+	bcm_writel(val, bcm_enet_shared_base[2] + off + chan * priv->dma_chan_width);
+}
+
+/*
+ * write given data into mii register and wait for transfer to end
+ * with timeout (average measured transfer time is 25us)
+ */
+static int do_mdio_op(struct bcm_enet_priv *priv, unsigned int data)
+{
+	int limit;
+
+	/* make sure mii interrupt status is cleared */
+	enet_writel(priv, ENET_IR_MII, ENET_IR_REG);
+
+	enet_writel(priv, data, ENET_MIIDATA_REG);
+	wmb();
+
+	/* busy wait on mii interrupt bit, with timeout */
+	limit = 1000;
+	do {
+		if (enet_readl(priv, ENET_IR_REG) & ENET_IR_MII)
+			break;
+		udelay(1);
+	} while (limit-- > 0);
+
+	return (limit < 0) ? 1 : 0;
+}
+
+/*
+ * MII internal read callback
+ */
+static int bcm_enet_mdio_read(struct bcm_enet_priv *priv, int mii_id,
+			      int regnum)
+{
+	u32 tmp, val;
+
+	tmp = regnum << ENET_MIIDATA_REG_SHIFT;
+	tmp |= 0x2 << ENET_MIIDATA_TA_SHIFT;
+	tmp |= mii_id << ENET_MIIDATA_PHYID_SHIFT;
+	tmp |= ENET_MIIDATA_OP_READ_MASK;
+
+	if (do_mdio_op(priv, tmp))
+		return -1;
+
+	val = enet_readl(priv, ENET_MIIDATA_REG);
+	val &= 0xffff;
+	return val;
+}
+
+/*
+ * MII internal write callback
+ */
+static int bcm_enet_mdio_write(struct bcm_enet_priv *priv, int mii_id,
+			       int regnum, u16 value)
+{
+	u32 tmp;
+
+	tmp = (value & 0xffff) << ENET_MIIDATA_DATA_SHIFT;
+	tmp |= 0x2 << ENET_MIIDATA_TA_SHIFT;
+	tmp |= regnum << ENET_MIIDATA_REG_SHIFT;
+	tmp |= mii_id << ENET_MIIDATA_PHYID_SHIFT;
+	tmp |= ENET_MIIDATA_OP_WRITE_MASK;
+
+	(void)do_mdio_op(priv, tmp);
+	return 0;
+}
+
+/*
+ * MII read callback from phylib
+ */
+static int bcm_enet_mdio_read_phylib(struct mii_bus *bus, int mii_id,
+				     int regnum)
+{
+	return bcm_enet_mdio_read(bus->priv, mii_id, regnum);
+}
+
+/*
+ * MII write callback from phylib
+ */
+static int bcm_enet_mdio_write_phylib(struct mii_bus *bus, int mii_id,
+				      int regnum, u16 value)
+{
+	return bcm_enet_mdio_write(bus->priv, mii_id, regnum, value);
+}
+
+/*
+ * MII read callback from mii core
+ */
+static int bcm_enet_mdio_read_mii(struct net_device *dev, int mii_id,
+				  int regnum)
+{
+	return bcm_enet_mdio_read(netdev_priv(dev), mii_id, regnum);
+}
+
+/*
+ * MII write callback from mii core
+ */
+static void bcm_enet_mdio_write_mii(struct net_device *dev, int mii_id,
+				    int regnum, int value)
+{
+	bcm_enet_mdio_write(netdev_priv(dev), mii_id, regnum, value);
+}
+
+/*
+ * refill rx queue
+ */
+static int bcm_enet_refill_rx(struct net_device *dev, bool napi_mode)
+{
+	struct bcm_enet_priv *priv;
+
+	priv = netdev_priv(dev);
+
+	while (priv->rx_desc_count < priv->rx_ring_size) {
+		struct bcm_enet_desc *desc;
+		int desc_idx;
+		u32 len_stat;
+
+		desc_idx = priv->rx_dirty_desc;
+		desc = &priv->rx_desc_cpu[desc_idx];
+
+		if (!priv->rx_buf[desc_idx]) {
+			void *buf;
+
+			if (likely(napi_mode))
+				buf = napi_alloc_frag(priv->rx_frag_size);
+			else
+				buf = netdev_alloc_frag(priv->rx_frag_size);
+			if (unlikely(!buf))
+				break;
+			priv->rx_buf[desc_idx] = buf;
+			desc->address = dma_map_single(&priv->pdev->dev,
+						       buf + priv->rx_buf_offset,
+						       priv->rx_buf_size,
+						       DMA_FROM_DEVICE);
+		}
+
+		len_stat = priv->rx_buf_size << DMADESC_LENGTH_SHIFT;
+		len_stat |= DMADESC_OWNER_MASK;
+		if (priv->rx_dirty_desc == priv->rx_ring_size - 1) {
+			len_stat |= (DMADESC_WRAP_MASK >> priv->dma_desc_shift);
+			priv->rx_dirty_desc = 0;
+		} else {
+			priv->rx_dirty_desc++;
+		}
+		wmb();
+		desc->len_stat = len_stat;
+
+		priv->rx_desc_count++;
+
+		/* tell dma engine we allocated one buffer */
+		if (priv->dma_has_sram)
+			enet_dma_writel(priv, 1, ENETDMA_BUFALLOC_REG(priv->rx_chan));
+		else
+			enet_dmac_writel(priv, 1, ENETDMAC_BUFALLOC, priv->rx_chan);
+	}
+
+	/* If rx ring is still empty, set a timer to try allocating
+	 * again at a later time. */
+	if (priv->rx_desc_count == 0 && netif_running(dev)) {
+		dev_warn(&priv->pdev->dev, "unable to refill rx ring\n");
+		priv->rx_timeout.expires = jiffies + HZ;
+		add_timer(&priv->rx_timeout);
+	}
+
+	return 0;
+}
+
+/*
+ * timer callback to defer refill rx queue in case we're OOM
+ */
+static void bcm_enet_refill_rx_timer(struct timer_list *t)
+{
+	struct bcm_enet_priv *priv = from_timer(priv, t, rx_timeout);
+	struct net_device *dev = priv->net_dev;
+
+	spin_lock(&priv->rx_lock);
+	bcm_enet_refill_rx(dev, false);
+	spin_unlock(&priv->rx_lock);
+}
+
+/*
+ * extract packet from rx queue
+ */
+static int bcm_enet_receive_queue(struct net_device *dev, int budget)
+{
+	struct bcm_enet_priv *priv;
+	struct list_head rx_list;
+	struct device *kdev;
+	int processed;
+
+	priv = netdev_priv(dev);
+	INIT_LIST_HEAD(&rx_list);
+	kdev = &priv->pdev->dev;
+	processed = 0;
+
+	/* don't scan ring further than number of refilled
+	 * descriptor */
+	if (budget > priv->rx_desc_count)
+		budget = priv->rx_desc_count;
+
+	do {
+		struct bcm_enet_desc *desc;
+		struct sk_buff *skb;
+		int desc_idx;
+		u32 len_stat;
+		unsigned int len;
+		void *buf;
+
+		desc_idx = priv->rx_curr_desc;
+		desc = &priv->rx_desc_cpu[desc_idx];
+
+		/* make sure we actually read the descriptor status at
+		 * each loop */
+		rmb();
+
+		len_stat = desc->len_stat;
+
+		/* break if dma ownership belongs to hw */
+		if (len_stat & DMADESC_OWNER_MASK)
+			break;
+
+		processed++;
+		priv->rx_curr_desc++;
+		if (priv->rx_curr_desc == priv->rx_ring_size)
+			priv->rx_curr_desc = 0;
+
+		/* if the packet does not have start of packet _and_
+		 * end of packet flag set, then just recycle it */
+		if ((len_stat & (DMADESC_ESOP_MASK >> priv->dma_desc_shift)) !=
+			(DMADESC_ESOP_MASK >> priv->dma_desc_shift)) {
+			dev->stats.rx_dropped++;
+			continue;
+		}
+
+		/* recycle packet if it's marked as bad */
+		if (!priv->enet_is_sw &&
+		    unlikely(len_stat & DMADESC_ERR_MASK)) {
+			dev->stats.rx_errors++;
+
+			if (len_stat & DMADESC_OVSIZE_MASK)
+				dev->stats.rx_length_errors++;
+			if (len_stat & DMADESC_CRC_MASK)
+				dev->stats.rx_crc_errors++;
+			if (len_stat & DMADESC_UNDER_MASK)
+				dev->stats.rx_frame_errors++;
+			if (len_stat & DMADESC_OV_MASK)
+				dev->stats.rx_fifo_errors++;
+			continue;
+		}
+
+		/* valid packet */
+		buf = priv->rx_buf[desc_idx];
+		len = (len_stat & DMADESC_LENGTH_MASK) >> DMADESC_LENGTH_SHIFT;
+		/* don't include FCS */
+		len -= 4;
+
+		if (len < copybreak) {
+			skb = napi_alloc_skb(&priv->napi, len);
+			if (unlikely(!skb)) {
+				/* forget packet, just rearm desc */
+				dev->stats.rx_dropped++;
+				continue;
+			}
+
+			dma_sync_single_for_cpu(kdev, desc->address,
+						len, DMA_FROM_DEVICE);
+			memcpy(skb->data, buf + priv->rx_buf_offset, len);
+			dma_sync_single_for_device(kdev, desc->address,
+						   len, DMA_FROM_DEVICE);
+		} else {
+			dma_unmap_single(kdev, desc->address,
+					 priv->rx_buf_size, DMA_FROM_DEVICE);
+			priv->rx_buf[desc_idx] = NULL;
+
+			skb = napi_build_skb(buf, priv->rx_frag_size);
+			if (unlikely(!skb)) {
+				skb_free_frag(buf);
+				dev->stats.rx_dropped++;
+				continue;
+			}
+			skb_reserve(skb, priv->rx_buf_offset);
+		}
+
+		skb_put(skb, len);
+		skb->protocol = eth_type_trans(skb, dev);
+		dev->stats.rx_packets++;
+		dev->stats.rx_bytes += len;
+		list_add_tail(&skb->list, &rx_list);
+
+	} while (processed < budget);
+
+	netif_receive_skb_list(&rx_list);
+	priv->rx_desc_count -= processed;
+
+	if (processed || !priv->rx_desc_count) {
+		bcm_enet_refill_rx(dev, true);
+
+		/* kick rx dma */
+		enet_dmac_writel(priv, priv->dma_chan_en_mask,
+					 ENETDMAC_CHANCFG, priv->rx_chan);
+	}
+
+	return processed;
+}
+
+
+/*
+ * try to or force reclaim of transmitted buffers
+ */
+static int bcm_enet_tx_reclaim(struct net_device *dev, int force, int budget)
+{
+	struct bcm_enet_priv *priv;
+	unsigned int bytes;
+	int released;
+
+	priv = netdev_priv(dev);
+	bytes = 0;
+	released = 0;
+
+	while (priv->tx_desc_count < priv->tx_ring_size) {
+		struct bcm_enet_desc *desc;
+		struct sk_buff *skb;
+
+		/* We run in a bh and fight against start_xmit, which
+		 * is called with bh disabled  */
+		spin_lock(&priv->tx_lock);
+
+		desc = &priv->tx_desc_cpu[priv->tx_dirty_desc];
+
+		if (!force && (desc->len_stat & DMADESC_OWNER_MASK)) {
+			spin_unlock(&priv->tx_lock);
+			break;
+		}
+
+		/* ensure other field of the descriptor were not read
+		 * before we checked ownership */
+		rmb();
+
+		skb = priv->tx_skb[priv->tx_dirty_desc];
+		priv->tx_skb[priv->tx_dirty_desc] = NULL;
+		dma_unmap_single(&priv->pdev->dev, desc->address, skb->len,
+				 DMA_TO_DEVICE);
+
+		priv->tx_dirty_desc++;
+		if (priv->tx_dirty_desc == priv->tx_ring_size)
+			priv->tx_dirty_desc = 0;
+		priv->tx_desc_count++;
+
+		spin_unlock(&priv->tx_lock);
+
+		if (desc->len_stat & DMADESC_UNDER_MASK)
+			dev->stats.tx_errors++;
+
+		bytes += skb->len;
+		napi_consume_skb(skb, budget);
+		released++;
+	}
+
+	netdev_completed_queue(dev, released, bytes);
+
+	if (netif_queue_stopped(dev) && released)
+		netif_wake_queue(dev);
+
+	return released;
+}
+
+/*
+ * poll func, called by network core
+ */
+static int bcm_enet_poll(struct napi_struct *napi, int budget)
+{
+	struct bcm_enet_priv *priv;
+	struct net_device *dev;
+	int rx_work_done;
+
+	priv = container_of(napi, struct bcm_enet_priv, napi);
+	dev = priv->net_dev;
+
+	/* ack interrupts */
+	enet_dmac_writel(priv, priv->dma_chan_int_mask,
+			 ENETDMAC_IR, priv->rx_chan);
+	enet_dmac_writel(priv, priv->dma_chan_int_mask,
+			 ENETDMAC_IR, priv->tx_chan);
+
+	/* reclaim sent skb */
+	bcm_enet_tx_reclaim(dev, 0, budget);
+
+	spin_lock(&priv->rx_lock);
+	rx_work_done = bcm_enet_receive_queue(dev, budget);
+	spin_unlock(&priv->rx_lock);
+
+	if (rx_work_done >= budget) {
+		/* rx queue is not yet empty/clean */
+		return rx_work_done;
+	}
+
+	/* no more packet in rx/tx queue, remove device from poll
+	 * queue */
+	napi_complete_done(napi, rx_work_done);
+
+	/* restore rx/tx interrupt */
+	enet_dmac_writel(priv, priv->dma_chan_int_mask,
+			 ENETDMAC_IRMASK, priv->rx_chan);
+	enet_dmac_writel(priv, priv->dma_chan_int_mask,
+			 ENETDMAC_IRMASK, priv->tx_chan);
+
+	return rx_work_done;
+}
+
+/*
+ * mac interrupt handler
+ */
+static irqreturn_t bcm_enet_isr_mac(int irq, void *dev_id)
+{
+	struct net_device *dev;
+	struct bcm_enet_priv *priv;
+	u32 stat;
+
+	dev = dev_id;
+	priv = netdev_priv(dev);
+
+	stat = enet_readl(priv, ENET_IR_REG);
+	if (!(stat & ENET_IR_MIB))
+		return IRQ_NONE;
+
+	/* clear & mask interrupt */
+	enet_writel(priv, ENET_IR_MIB, ENET_IR_REG);
+	enet_writel(priv, 0, ENET_IRMASK_REG);
+
+	/* read mib registers in workqueue */
+	schedule_work(&priv->mib_update_task);
+
+	return IRQ_HANDLED;
+}
+
+/*
+ * rx/tx dma interrupt handler
+ */
+static irqreturn_t bcm_enet_isr_dma(int irq, void *dev_id)
+{
+	struct net_device *dev;
+	struct bcm_enet_priv *priv;
+
+	dev = dev_id;
+	priv = netdev_priv(dev);
+
+	/* mask rx/tx interrupts */
+	enet_dmac_writel(priv, 0, ENETDMAC_IRMASK, priv->rx_chan);
+	enet_dmac_writel(priv, 0, ENETDMAC_IRMASK, priv->tx_chan);
+
+	napi_schedule(&priv->napi);
+
+	return IRQ_HANDLED;
+}
+
+/*
+ * tx request callback
+ */
+static netdev_tx_t
+bcm_enet_start_xmit(struct sk_buff *skb, struct net_device *dev)
+{
+	struct bcm_enet_priv *priv;
+	struct bcm_enet_desc *desc;
+	u32 len_stat;
+	netdev_tx_t ret;
+
+	priv = netdev_priv(dev);
+
+	/* lock against tx reclaim */
+	spin_lock(&priv->tx_lock);
+
+	/* make sure  the tx hw queue  is not full,  should not happen
+	 * since we stop queue before it's the case */
+	if (unlikely(!priv->tx_desc_count)) {
+		netif_stop_queue(dev);
+		dev_err(&priv->pdev->dev, "xmit called with no tx desc "
+			"available?\n");
+		ret = NETDEV_TX_BUSY;
+		goto out_unlock;
+	}
+
+	/* pad small packets sent on a switch device */
+	if (priv->enet_is_sw && skb->len < 64) {
+		int needed = 64 - skb->len;
+		char *data;
+
+		if (unlikely(skb_tailroom(skb) < needed)) {
+			struct sk_buff *nskb;
+
+			nskb = skb_copy_expand(skb, 0, needed, GFP_ATOMIC);
+			if (!nskb) {
+				ret = NETDEV_TX_BUSY;
+				goto out_unlock;
+			}
+			dev_kfree_skb(skb);
+			skb = nskb;
+		}
+		data = skb_put_zero(skb, needed);
+	}
+
+	/* point to the next available desc */
+	desc = &priv->tx_desc_cpu[priv->tx_curr_desc];
+	priv->tx_skb[priv->tx_curr_desc] = skb;
+
+	/* fill descriptor */
+	desc->address = dma_map_single(&priv->pdev->dev, skb->data, skb->len,
+				       DMA_TO_DEVICE);
+
+	len_stat = (skb->len << DMADESC_LENGTH_SHIFT) & DMADESC_LENGTH_MASK;
+	len_stat |= (DMADESC_ESOP_MASK >> priv->dma_desc_shift) |
+		DMADESC_APPEND_CRC |
+		DMADESC_OWNER_MASK;
+
+	priv->tx_curr_desc++;
+	if (priv->tx_curr_desc == priv->tx_ring_size) {
+		priv->tx_curr_desc = 0;
+		len_stat |= (DMADESC_WRAP_MASK >> priv->dma_desc_shift);
+	}
+	priv->tx_desc_count--;
+
+	/* dma might be already polling, make sure we update desc
+	 * fields in correct order */
+	wmb();
+	desc->len_stat = len_stat;
+	wmb();
+
+	netdev_sent_queue(dev, skb->len);
+
+	/* kick tx dma */
+	if (!netdev_xmit_more() || !priv->tx_desc_count)
+		enet_dmac_writel(priv, priv->dma_chan_en_mask,
+				 ENETDMAC_CHANCFG, priv->tx_chan);
+
+	/* stop queue if no more desc available */
+	if (!priv->tx_desc_count)
+		netif_stop_queue(dev);
+
+	dev->stats.tx_bytes += skb->len;
+	dev->stats.tx_packets++;
+	ret = NETDEV_TX_OK;
+
+out_unlock:
+	spin_unlock(&priv->tx_lock);
+	return ret;
+}
+
+/*
+ * Change the interface's mac address.
+ */
+static int bcm_enet_set_mac_address(struct net_device *dev, void *p)
+{
+	struct bcm_enet_priv *priv;
+	struct sockaddr *addr = p;
+	u32 val;
+
+	priv = netdev_priv(dev);
+	eth_hw_addr_set(dev, addr->sa_data);
+
+	/* use perfect match register 0 to store my mac address */
+	val = (dev->dev_addr[2] << 24) | (dev->dev_addr[3] << 16) |
+		(dev->dev_addr[4] << 8) | dev->dev_addr[5];
+	enet_writel(priv, val, ENET_PML_REG(0));
+
+	val = (dev->dev_addr[0] << 8 | dev->dev_addr[1]);
+	val |= ENET_PMH_DATAVALID_MASK;
+	enet_writel(priv, val, ENET_PMH_REG(0));
+
+	return 0;
+}
+
+/*
+ * Change rx mode (promiscuous/allmulti) and update multicast list
+ */
+static void bcm_enet_set_multicast_list(struct net_device *dev)
+{
+	struct bcm_enet_priv *priv;
+	struct netdev_hw_addr *ha;
+	u32 val;
+	int i;
+
+	priv = netdev_priv(dev);
+
+	val = enet_readl(priv, ENET_RXCFG_REG);
+
+	if (dev->flags & IFF_PROMISC)
+		val |= ENET_RXCFG_PROMISC_MASK;
+	else
+		val &= ~ENET_RXCFG_PROMISC_MASK;
+
+	/* only 3 perfect match registers left, first one is used for
+	 * own mac address */
+	if ((dev->flags & IFF_ALLMULTI) || netdev_mc_count(dev) > 3)
+		val |= ENET_RXCFG_ALLMCAST_MASK;
+	else
+		val &= ~ENET_RXCFG_ALLMCAST_MASK;
+
+	/* no need to set perfect match registers if we catch all
+	 * multicast */
+	if (val & ENET_RXCFG_ALLMCAST_MASK) {
+		enet_writel(priv, val, ENET_RXCFG_REG);
+		return;
+	}
+
+	i = 0;
+	netdev_for_each_mc_addr(ha, dev) {
+		u8 *dmi_addr;
+		u32 tmp;
+
+		if (i == 3)
+			break;
+		/* update perfect match registers */
+		dmi_addr = ha->addr;
+		tmp = (dmi_addr[2] << 24) | (dmi_addr[3] << 16) |
+			(dmi_addr[4] << 8) | dmi_addr[5];
+		enet_writel(priv, tmp, ENET_PML_REG(i + 1));
+
+		tmp = (dmi_addr[0] << 8 | dmi_addr[1]);
+		tmp |= ENET_PMH_DATAVALID_MASK;
+		enet_writel(priv, tmp, ENET_PMH_REG(i++ + 1));
+	}
+
+	for (; i < 3; i++) {
+		enet_writel(priv, 0, ENET_PML_REG(i + 1));
+		enet_writel(priv, 0, ENET_PMH_REG(i + 1));
+	}
+
+	enet_writel(priv, val, ENET_RXCFG_REG);
+}
+
+/*
+ * set mac duplex parameters
+ */
+static void bcm_enet_set_duplex(struct bcm_enet_priv *priv, int fullduplex)
+{
+	u32 val;
+
+	val = enet_readl(priv, ENET_TXCTL_REG);
+	if (fullduplex)
+		val |= ENET_TXCTL_FD_MASK;
+	else
+		val &= ~ENET_TXCTL_FD_MASK;
+	enet_writel(priv, val, ENET_TXCTL_REG);
+}
+
+/*
+ * set mac flow control parameters
+ */
+static void bcm_enet_set_flow(struct bcm_enet_priv *priv, int rx_en, int tx_en)
+{
+	u32 val;
+
+	/* rx flow control (pause frame handling) */
+	val = enet_readl(priv, ENET_RXCFG_REG);
+	if (rx_en)
+		val |= ENET_RXCFG_ENFLOW_MASK;
+	else
+		val &= ~ENET_RXCFG_ENFLOW_MASK;
+	enet_writel(priv, val, ENET_RXCFG_REG);
+
+	if (!priv->dma_has_sram)
+		return;
+
+	/* tx flow control (pause frame generation) */
+	val = enet_dma_readl(priv, ENETDMA_CFG_REG);
+	if (tx_en)
+		val |= ENETDMA_CFG_FLOWCH_MASK(priv->rx_chan);
+	else
+		val &= ~ENETDMA_CFG_FLOWCH_MASK(priv->rx_chan);
+	enet_dma_writel(priv, val, ENETDMA_CFG_REG);
+}
+
+/*
+ * link changed callback (from phylib)
+ */
+static void bcm_enet_adjust_phy_link(struct net_device *dev)
+{
+	struct bcm_enet_priv *priv;
+	struct phy_device *phydev;
+	int status_changed;
+
+	priv = netdev_priv(dev);
+	phydev = dev->phydev;
+	status_changed = 0;
+
+	if (priv->old_link != phydev->link) {
+		status_changed = 1;
+		priv->old_link = phydev->link;
+	}
+
+	/* reflect duplex change in mac configuration */
+	if (phydev->link && phydev->duplex != priv->old_duplex) {
+		bcm_enet_set_duplex(priv,
+				    (phydev->duplex == DUPLEX_FULL) ? 1 : 0);
+		status_changed = 1;
+		priv->old_duplex = phydev->duplex;
+	}
+
+	/* enable flow control if remote advertise it (trust phylib to
+	 * check that duplex is full */
+	if (phydev->link && phydev->pause != priv->old_pause) {
+		int rx_pause_en, tx_pause_en;
+
+		if (phydev->pause) {
+			/* pause was advertised by lpa and us */
+			rx_pause_en = 1;
+			tx_pause_en = 1;
+		} else if (!priv->pause_auto) {
+			/* pause setting overridden by user */
+			rx_pause_en = priv->pause_rx;
+			tx_pause_en = priv->pause_tx;
+		} else {
+			rx_pause_en = 0;
+			tx_pause_en = 0;
+		}
+
+		bcm_enet_set_flow(priv, rx_pause_en, tx_pause_en);
+		status_changed = 1;
+		priv->old_pause = phydev->pause;
+	}
+
+	if (status_changed) {
+		pr_info("%s: link %s", dev->name, phydev->link ?
+			"UP" : "DOWN");
+		if (phydev->link)
+			pr_cont(" - %d/%s - flow control %s", phydev->speed,
+			       DUPLEX_FULL == phydev->duplex ? "full" : "half",
+			       phydev->pause == 1 ? "rx&tx" : "off");
+
+		pr_cont("\n");
+	}
+}
+
+/*
+ * link changed callback (if phylib is not used)
+ */
+static void bcm_enet_adjust_link(struct net_device *dev)
+{
+	struct bcm_enet_priv *priv;
+
+	priv = netdev_priv(dev);
+	bcm_enet_set_duplex(priv, priv->force_duplex_full);
+	bcm_enet_set_flow(priv, priv->pause_rx, priv->pause_tx);
+	netif_carrier_on(dev);
+
+	pr_info("%s: link forced UP - %d/%s - flow control %s/%s\n",
+		dev->name,
+		priv->force_speed_100 ? 100 : 10,
+		priv->force_duplex_full ? "full" : "half",
+		priv->pause_rx ? "rx" : "off",
+		priv->pause_tx ? "tx" : "off");
+}
+
+static void bcm_enet_free_rx_buf_ring(struct device *kdev, struct bcm_enet_priv *priv)
+{
+	int i;
+
+	for (i = 0; i < priv->rx_ring_size; i++) {
+		struct bcm_enet_desc *desc;
+
+		if (!priv->rx_buf[i])
+			continue;
+
+		desc = &priv->rx_desc_cpu[i];
+		dma_unmap_single(kdev, desc->address, priv->rx_buf_size,
+				 DMA_FROM_DEVICE);
+		skb_free_frag(priv->rx_buf[i]);
+	}
+	kfree(priv->rx_buf);
+}
+
+/*
+ * open callback, allocate dma rings & buffers and start rx operation
+ */
+static int bcm_enet_open(struct net_device *dev)
+{
+	struct bcm_enet_priv *priv;
+	struct sockaddr addr;
+	struct device *kdev;
+	struct phy_device *phydev;
+	int i, ret;
+	unsigned int size;
+	char phy_id[MII_BUS_ID_SIZE + 3];
+	void *p;
+	u32 val;
+
+	priv = netdev_priv(dev);
+	kdev = &priv->pdev->dev;
+
+	if (priv->has_phy) {
+		/* connect to PHY */
+		snprintf(phy_id, sizeof(phy_id), PHY_ID_FMT,
+			 priv->mii_bus->id, priv->phy_id);
+
+		phydev = phy_connect(dev, phy_id, bcm_enet_adjust_phy_link,
+				     PHY_INTERFACE_MODE_MII);
+
+		if (IS_ERR(phydev)) {
+			dev_err(kdev, "could not attach to PHY\n");
+			return PTR_ERR(phydev);
+		}
+
+		/* mask with MAC supported features */
+		phy_support_sym_pause(phydev);
+		phy_set_max_speed(phydev, SPEED_100);
+		phy_set_sym_pause(phydev, priv->pause_rx, priv->pause_rx,
+				  priv->pause_auto);
+
+		phy_attached_info(phydev);
+
+		priv->old_link = 0;
+		priv->old_duplex = -1;
+		priv->old_pause = -1;
+	} else {
+		phydev = NULL;
+	}
+
+	/* mask all interrupts and request them */
+	enet_writel(priv, 0, ENET_IRMASK_REG);
+	enet_dmac_writel(priv, 0, ENETDMAC_IRMASK, priv->rx_chan);
+	enet_dmac_writel(priv, 0, ENETDMAC_IRMASK, priv->tx_chan);
+
+	ret = request_irq(dev->irq, bcm_enet_isr_mac, 0, dev->name, dev);
+	if (ret)
+		goto out_phy_disconnect;
+
+	ret = request_irq(priv->irq_rx, bcm_enet_isr_dma, 0,
+			  dev->name, dev);
+	if (ret)
+		goto out_freeirq;
+
+	ret = request_irq(priv->irq_tx, bcm_enet_isr_dma,
+			  0, dev->name, dev);
+	if (ret)
+		goto out_freeirq_rx;
+
+	/* initialize perfect match registers */
+	for (i = 0; i < 4; i++) {
+		enet_writel(priv, 0, ENET_PML_REG(i));
+		enet_writel(priv, 0, ENET_PMH_REG(i));
+	}
+
+	/* write device mac address */
+	memcpy(addr.sa_data, dev->dev_addr, ETH_ALEN);
+	bcm_enet_set_mac_address(dev, &addr);
+
+	/* allocate rx dma ring */
+	size = priv->rx_ring_size * sizeof(struct bcm_enet_desc);
+	p = dma_alloc_coherent(kdev, size, &priv->rx_desc_dma, GFP_KERNEL);
+	if (!p) {
+		ret = -ENOMEM;
+		goto out_freeirq_tx;
+	}
+
+	priv->rx_desc_alloc_size = size;
+	priv->rx_desc_cpu = p;
+
+	/* allocate tx dma ring */
+	size = priv->tx_ring_size * sizeof(struct bcm_enet_desc);
+	p = dma_alloc_coherent(kdev, size, &priv->tx_desc_dma, GFP_KERNEL);
+	if (!p) {
+		ret = -ENOMEM;
+		goto out_free_rx_ring;
+	}
+
+	priv->tx_desc_alloc_size = size;
+	priv->tx_desc_cpu = p;
+
+	priv->tx_skb = kcalloc(priv->tx_ring_size, sizeof(struct sk_buff *),
+			       GFP_KERNEL);
+	if (!priv->tx_skb) {
+		ret = -ENOMEM;
+		goto out_free_tx_ring;
+	}
+
+	priv->tx_desc_count = priv->tx_ring_size;
+	priv->tx_dirty_desc = 0;
+	priv->tx_curr_desc = 0;
+	spin_lock_init(&priv->tx_lock);
+
+	/* init & fill rx ring with buffers */
+	priv->rx_buf = kcalloc(priv->rx_ring_size, sizeof(void *),
+			       GFP_KERNEL);
+	if (!priv->rx_buf) {
+		ret = -ENOMEM;
+		goto out_free_tx_skb;
+	}
+
+	priv->rx_desc_count = 0;
+	priv->rx_dirty_desc = 0;
+	priv->rx_curr_desc = 0;
+
+	/* initialize flow control buffer allocation */
+	if (priv->dma_has_sram)
+		enet_dma_writel(priv, ENETDMA_BUFALLOC_FORCE_MASK | 0,
+				ENETDMA_BUFALLOC_REG(priv->rx_chan));
+	else
+		enet_dmac_writel(priv, ENETDMA_BUFALLOC_FORCE_MASK | 0,
+				ENETDMAC_BUFALLOC, priv->rx_chan);
+
+	if (bcm_enet_refill_rx(dev, false)) {
+		dev_err(kdev, "cannot allocate rx buffer queue\n");
+		ret = -ENOMEM;
+		goto out;
+	}
+
+	/* write rx & tx ring addresses */
+	if (priv->dma_has_sram) {
+		enet_dmas_writel(priv, priv->rx_desc_dma,
+				 ENETDMAS_RSTART_REG, priv->rx_chan);
+		enet_dmas_writel(priv, priv->tx_desc_dma,
+			 ENETDMAS_RSTART_REG, priv->tx_chan);
+	} else {
+		enet_dmac_writel(priv, priv->rx_desc_dma,
+				ENETDMAC_RSTART, priv->rx_chan);
+		enet_dmac_writel(priv, priv->tx_desc_dma,
+				ENETDMAC_RSTART, priv->tx_chan);
+	}
+
+	/* clear remaining state ram for rx & tx channel */
+	if (priv->dma_has_sram) {
+		enet_dmas_writel(priv, 0, ENETDMAS_SRAM2_REG, priv->rx_chan);
+		enet_dmas_writel(priv, 0, ENETDMAS_SRAM2_REG, priv->tx_chan);
+		enet_dmas_writel(priv, 0, ENETDMAS_SRAM3_REG, priv->rx_chan);
+		enet_dmas_writel(priv, 0, ENETDMAS_SRAM3_REG, priv->tx_chan);
+		enet_dmas_writel(priv, 0, ENETDMAS_SRAM4_REG, priv->rx_chan);
+		enet_dmas_writel(priv, 0, ENETDMAS_SRAM4_REG, priv->tx_chan);
+	} else {
+		enet_dmac_writel(priv, 0, ENETDMAC_FC, priv->rx_chan);
+		enet_dmac_writel(priv, 0, ENETDMAC_FC, priv->tx_chan);
+	}
+
+	/* set max rx/tx length */
+	enet_writel(priv, priv->hw_mtu, ENET_RXMAXLEN_REG);
+	enet_writel(priv, priv->hw_mtu, ENET_TXMAXLEN_REG);
+
+	/* set dma maximum burst len */
+	enet_dmac_writel(priv, priv->dma_maxburst,
+			 ENETDMAC_MAXBURST, priv->rx_chan);
+	enet_dmac_writel(priv, priv->dma_maxburst,
+			 ENETDMAC_MAXBURST, priv->tx_chan);
+
+	/* set correct transmit fifo watermark */
+	enet_writel(priv, BCMENET_TX_FIFO_TRESH, ENET_TXWMARK_REG);
+
+	/* set flow control low/high threshold to 1/3 / 2/3 */
+	if (priv->dma_has_sram) {
+		val = priv->rx_ring_size / 3;
+		enet_dma_writel(priv, val, ENETDMA_FLOWCL_REG(priv->rx_chan));
+		val = (priv->rx_ring_size * 2) / 3;
+		enet_dma_writel(priv, val, ENETDMA_FLOWCH_REG(priv->rx_chan));
+	} else {
+		enet_dmac_writel(priv, 5, ENETDMAC_FC, priv->rx_chan);
+		enet_dmac_writel(priv, priv->rx_ring_size, ENETDMAC_LEN, priv->rx_chan);
+		enet_dmac_writel(priv, priv->tx_ring_size, ENETDMAC_LEN, priv->tx_chan);
+	}
+
+	/* all set, enable mac and interrupts, start dma engine and
+	 * kick rx dma channel */
+	wmb();
+	val = enet_readl(priv, ENET_CTL_REG);
+	val |= ENET_CTL_ENABLE_MASK;
+	enet_writel(priv, val, ENET_CTL_REG);
+	if (priv->dma_has_sram)
+		enet_dma_writel(priv, ENETDMA_CFG_EN_MASK, ENETDMA_CFG_REG);
+	enet_dmac_writel(priv, priv->dma_chan_en_mask,
+			 ENETDMAC_CHANCFG, priv->rx_chan);
+
+	/* watch "mib counters about to overflow" interrupt */
+	enet_writel(priv, ENET_IR_MIB, ENET_IR_REG);
+	enet_writel(priv, ENET_IR_MIB, ENET_IRMASK_REG);
+
+	/* watch "packet transferred" interrupt in rx and tx */
+	enet_dmac_writel(priv, priv->dma_chan_int_mask,
+			 ENETDMAC_IR, priv->rx_chan);
+	enet_dmac_writel(priv, priv->dma_chan_int_mask,
+			 ENETDMAC_IR, priv->tx_chan);
+
+	/* make sure we enable napi before rx interrupt  */
+	napi_enable(&priv->napi);
+
+	enet_dmac_writel(priv, priv->dma_chan_int_mask,
+			 ENETDMAC_IRMASK, priv->rx_chan);
+	enet_dmac_writel(priv, priv->dma_chan_int_mask,
+			 ENETDMAC_IRMASK, priv->tx_chan);
+
+	if (phydev)
+		phy_start(phydev);
+	else
+		bcm_enet_adjust_link(dev);
+
+	netif_start_queue(dev);
+	return 0;
+
+out:
+	bcm_enet_free_rx_buf_ring(kdev, priv);
+
+out_free_tx_skb:
+	kfree(priv->tx_skb);
+
+out_free_tx_ring:
+	dma_free_coherent(kdev, priv->tx_desc_alloc_size,
+			  priv->tx_desc_cpu, priv->tx_desc_dma);
+
+out_free_rx_ring:
+	dma_free_coherent(kdev, priv->rx_desc_alloc_size,
+			  priv->rx_desc_cpu, priv->rx_desc_dma);
+
+out_freeirq_tx:
+	free_irq(priv->irq_tx, dev);
+
+out_freeirq_rx:
+	free_irq(priv->irq_rx, dev);
+
+out_freeirq:
+	free_irq(dev->irq, dev);
+
+out_phy_disconnect:
+	if (phydev)
+		phy_disconnect(phydev);
+
+	return ret;
+}
+
+/*
+ * disable mac
+ */
+static void bcm_enet_disable_mac(struct bcm_enet_priv *priv)
+{
+	int limit;
+	u32 val;
+
+	val = enet_readl(priv, ENET_CTL_REG);
+	val |= ENET_CTL_DISABLE_MASK;
+	enet_writel(priv, val, ENET_CTL_REG);
+
+	limit = 1000;
+	do {
+		u32 val;
+
+		val = enet_readl(priv, ENET_CTL_REG);
+		if (!(val & ENET_CTL_DISABLE_MASK))
+			break;
+		udelay(1);
+	} while (limit--);
+}
+
+/*
+ * disable dma in given channel
+ */
+static void bcm_enet_disable_dma(struct bcm_enet_priv *priv, int chan)
+{
+	int limit;
+
+	enet_dmac_writel(priv, 0, ENETDMAC_CHANCFG, chan);
+
+	limit = 1000;
+	do {
+		u32 val;
+
+		val = enet_dmac_readl(priv, ENETDMAC_CHANCFG, chan);
+		if (!(val & ENETDMAC_CHANCFG_EN_MASK))
+			break;
+		udelay(1);
+	} while (limit--);
+}
+
+/*
+ * stop callback
+ */
+static int bcm_enet_stop(struct net_device *dev)
+{
+	struct bcm_enet_priv *priv;
+	struct device *kdev;
+
+	priv = netdev_priv(dev);
+	kdev = &priv->pdev->dev;
+
+	netif_stop_queue(dev);
+	napi_disable(&priv->napi);
+	if (priv->has_phy)
+		phy_stop(dev->phydev);
+	del_timer_sync(&priv->rx_timeout);
+
+	/* mask all interrupts */
+	enet_writel(priv, 0, ENET_IRMASK_REG);
+	enet_dmac_writel(priv, 0, ENETDMAC_IRMASK, priv->rx_chan);
+	enet_dmac_writel(priv, 0, ENETDMAC_IRMASK, priv->tx_chan);
+
+	/* make sure no mib update is scheduled */
+	cancel_work_sync(&priv->mib_update_task);
+
+	/* disable dma & mac */
+	bcm_enet_disable_dma(priv, priv->tx_chan);
+	bcm_enet_disable_dma(priv, priv->rx_chan);
+	bcm_enet_disable_mac(priv);
+
+	/* force reclaim of all tx buffers */
+	bcm_enet_tx_reclaim(dev, 1, 0);
+
+	/* free the rx buffer ring */
+	bcm_enet_free_rx_buf_ring(kdev, priv);
+
+	/* free remaining allocated memory */
+	kfree(priv->tx_skb);
+	dma_free_coherent(kdev, priv->rx_desc_alloc_size,
+			  priv->rx_desc_cpu, priv->rx_desc_dma);
+	dma_free_coherent(kdev, priv->tx_desc_alloc_size,
+			  priv->tx_desc_cpu, priv->tx_desc_dma);
+	free_irq(priv->irq_tx, dev);
+	free_irq(priv->irq_rx, dev);
+	free_irq(dev->irq, dev);
+
+	/* release phy */
+	if (priv->has_phy)
+		phy_disconnect(dev->phydev);
+
+	/* reset BQL after forced tx reclaim to prevent kernel panic */
+	netdev_reset_queue(dev);
+
+	return 0;
+}
+
+/*
+ * ethtool callbacks
+ */
+struct bcm_enet_stats {
+	char stat_string[ETH_GSTRING_LEN];
+	int sizeof_stat;
+	int stat_offset;
+	int mib_reg;
+};
+
+#define GEN_STAT(m) sizeof(((struct bcm_enet_priv *)0)->m),		\
+		     offsetof(struct bcm_enet_priv, m)
+#define DEV_STAT(m) sizeof(((struct net_device_stats *)0)->m),		\
+		     offsetof(struct net_device_stats, m)
+
+static const struct bcm_enet_stats bcm_enet_gstrings_stats[] = {
+	{ "rx_packets", DEV_STAT(rx_packets), -1 },
+	{ "tx_packets",	DEV_STAT(tx_packets), -1 },
+	{ "rx_bytes", DEV_STAT(rx_bytes), -1 },
+	{ "tx_bytes", DEV_STAT(tx_bytes), -1 },
+	{ "rx_errors", DEV_STAT(rx_errors), -1 },
+	{ "tx_errors", DEV_STAT(tx_errors), -1 },
+	{ "rx_dropped",	DEV_STAT(rx_dropped), -1 },
+	{ "tx_dropped",	DEV_STAT(tx_dropped), -1 },
+
+	{ "rx_good_octets", GEN_STAT(mib.rx_gd_octets), ETH_MIB_RX_GD_OCTETS},
+	{ "rx_good_pkts", GEN_STAT(mib.rx_gd_pkts), ETH_MIB_RX_GD_PKTS },
+	{ "rx_broadcast", GEN_STAT(mib.rx_brdcast), ETH_MIB_RX_BRDCAST },
+	{ "rx_multicast", GEN_STAT(mib.rx_mult), ETH_MIB_RX_MULT },
+	{ "rx_64_octets", GEN_STAT(mib.rx_64), ETH_MIB_RX_64 },
+	{ "rx_65_127_oct", GEN_STAT(mib.rx_65_127), ETH_MIB_RX_65_127 },
+	{ "rx_128_255_oct", GEN_STAT(mib.rx_128_255), ETH_MIB_RX_128_255 },
+	{ "rx_256_511_oct", GEN_STAT(mib.rx_256_511), ETH_MIB_RX_256_511 },
+	{ "rx_512_1023_oct", GEN_STAT(mib.rx_512_1023), ETH_MIB_RX_512_1023 },
+	{ "rx_1024_max_oct", GEN_STAT(mib.rx_1024_max), ETH_MIB_RX_1024_MAX },
+	{ "rx_jabber", GEN_STAT(mib.rx_jab), ETH_MIB_RX_JAB },
+	{ "rx_oversize", GEN_STAT(mib.rx_ovr), ETH_MIB_RX_OVR },
+	{ "rx_fragment", GEN_STAT(mib.rx_frag), ETH_MIB_RX_FRAG },
+	{ "rx_dropped",	GEN_STAT(mib.rx_drop), ETH_MIB_RX_DROP },
+	{ "rx_crc_align", GEN_STAT(mib.rx_crc_align), ETH_MIB_RX_CRC_ALIGN },
+	{ "rx_undersize", GEN_STAT(mib.rx_und), ETH_MIB_RX_UND },
+	{ "rx_crc", GEN_STAT(mib.rx_crc), ETH_MIB_RX_CRC },
+	{ "rx_align", GEN_STAT(mib.rx_align), ETH_MIB_RX_ALIGN },
+	{ "rx_symbol_error", GEN_STAT(mib.rx_sym), ETH_MIB_RX_SYM },
+	{ "rx_pause", GEN_STAT(mib.rx_pause), ETH_MIB_RX_PAUSE },
+	{ "rx_control", GEN_STAT(mib.rx_cntrl), ETH_MIB_RX_CNTRL },
+
+	{ "tx_good_octets", GEN_STAT(mib.tx_gd_octets), ETH_MIB_TX_GD_OCTETS },
+	{ "tx_good_pkts", GEN_STAT(mib.tx_gd_pkts), ETH_MIB_TX_GD_PKTS },
+	{ "tx_broadcast", GEN_STAT(mib.tx_brdcast), ETH_MIB_TX_BRDCAST },
+	{ "tx_multicast", GEN_STAT(mib.tx_mult), ETH_MIB_TX_MULT },
+	{ "tx_64_oct", GEN_STAT(mib.tx_64), ETH_MIB_TX_64 },
+	{ "tx_65_127_oct", GEN_STAT(mib.tx_65_127), ETH_MIB_TX_65_127 },
+	{ "tx_128_255_oct", GEN_STAT(mib.tx_128_255), ETH_MIB_TX_128_255 },
+	{ "tx_256_511_oct", GEN_STAT(mib.tx_256_511), ETH_MIB_TX_256_511 },
+	{ "tx_512_1023_oct", GEN_STAT(mib.tx_512_1023), ETH_MIB_TX_512_1023},
+	{ "tx_1024_max_oct", GEN_STAT(mib.tx_1024_max), ETH_MIB_TX_1024_MAX },
+	{ "tx_jabber", GEN_STAT(mib.tx_jab), ETH_MIB_TX_JAB },
+	{ "tx_oversize", GEN_STAT(mib.tx_ovr), ETH_MIB_TX_OVR },
+	{ "tx_fragment", GEN_STAT(mib.tx_frag), ETH_MIB_TX_FRAG },
+	{ "tx_underrun", GEN_STAT(mib.tx_underrun), ETH_MIB_TX_UNDERRUN },
+	{ "tx_collisions", GEN_STAT(mib.tx_col), ETH_MIB_TX_COL },
+	{ "tx_single_collision", GEN_STAT(mib.tx_1_col), ETH_MIB_TX_1_COL },
+	{ "tx_multiple_collision", GEN_STAT(mib.tx_m_col), ETH_MIB_TX_M_COL },
+	{ "tx_excess_collision", GEN_STAT(mib.tx_ex_col), ETH_MIB_TX_EX_COL },
+	{ "tx_late_collision", GEN_STAT(mib.tx_late), ETH_MIB_TX_LATE },
+	{ "tx_deferred", GEN_STAT(mib.tx_def), ETH_MIB_TX_DEF },
+	{ "tx_carrier_sense", GEN_STAT(mib.tx_crs), ETH_MIB_TX_CRS },
+	{ "tx_pause", GEN_STAT(mib.tx_pause), ETH_MIB_TX_PAUSE },
+
+};
+
+#define BCM_ENET_STATS_LEN	ARRAY_SIZE(bcm_enet_gstrings_stats)
+
+static const u32 unused_mib_regs[] = {
+	ETH_MIB_TX_ALL_OCTETS,
+	ETH_MIB_TX_ALL_PKTS,
+	ETH_MIB_RX_ALL_OCTETS,
+	ETH_MIB_RX_ALL_PKTS,
+};
+
+
+static void bcm_enet_get_drvinfo(struct net_device *netdev,
+				 struct ethtool_drvinfo *drvinfo)
+{
+	strscpy(drvinfo->driver, bcm_enet_driver_name, sizeof(drvinfo->driver));
+	strscpy(drvinfo->bus_info, "bcm63xx", sizeof(drvinfo->bus_info));
+}
+
+static int bcm_enet_get_sset_count(struct net_device *netdev,
+					int string_set)
+{
+	switch (string_set) {
+	case ETH_SS_STATS:
+		return BCM_ENET_STATS_LEN;
+	default:
+		return -EINVAL;
+	}
+}
+
+static void bcm_enet_get_strings(struct net_device *netdev,
+				 u32 stringset, u8 *data)
+{
+	int i;
+
+	switch (stringset) {
+	case ETH_SS_STATS:
+		for (i = 0; i < BCM_ENET_STATS_LEN; i++) {
+			memcpy(data + i * ETH_GSTRING_LEN,
+			       bcm_enet_gstrings_stats[i].stat_string,
+			       ETH_GSTRING_LEN);
+		}
+		break;
+	}
+}
+
+static void update_mib_counters(struct bcm_enet_priv *priv)
+{
+	int i;
+
+	for (i = 0; i < BCM_ENET_STATS_LEN; i++) {
+		const struct bcm_enet_stats *s;
+		u32 val;
+		char *p;
+
+		s = &bcm_enet_gstrings_stats[i];
+		if (s->mib_reg == -1)
+			continue;
+
+		val = enet_readl(priv, ENET_MIB_REG(s->mib_reg));
+		p = (char *)priv + s->stat_offset;
+
+		if (s->sizeof_stat == sizeof(u64))
+			*(u64 *)p += val;
+		else
+			*(u32 *)p += val;
+	}
+
+	/* also empty unused mib counters to make sure mib counter
+	 * overflow interrupt is cleared */
+	for (i = 0; i < ARRAY_SIZE(unused_mib_regs); i++)
+		(void)enet_readl(priv, ENET_MIB_REG(unused_mib_regs[i]));
+}
+
+static void bcm_enet_update_mib_counters_defer(struct work_struct *t)
+{
+	struct bcm_enet_priv *priv;
+
+	priv = container_of(t, struct bcm_enet_priv, mib_update_task);
+	mutex_lock(&priv->mib_update_lock);
+	update_mib_counters(priv);
+	mutex_unlock(&priv->mib_update_lock);
+
+	/* reenable mib interrupt */
+	if (netif_running(priv->net_dev))
+		enet_writel(priv, ENET_IR_MIB, ENET_IRMASK_REG);
+}
+
+static void bcm_enet_get_ethtool_stats(struct net_device *netdev,
+				       struct ethtool_stats *stats,
+				       u64 *data)
+{
+	struct bcm_enet_priv *priv;
+	int i;
+
+	priv = netdev_priv(netdev);
+
+	mutex_lock(&priv->mib_update_lock);
+	update_mib_counters(priv);
+
+	for (i = 0; i < BCM_ENET_STATS_LEN; i++) {
+		const struct bcm_enet_stats *s;
+		char *p;
+
+		s = &bcm_enet_gstrings_stats[i];
+		if (s->mib_reg == -1)
+			p = (char *)&netdev->stats;
+		else
+			p = (char *)priv;
+		p += s->stat_offset;
+		data[i] = (s->sizeof_stat == sizeof(u64)) ?
+			*(u64 *)p : *(u32 *)p;
+	}
+	mutex_unlock(&priv->mib_update_lock);
+}
+
+static int bcm_enet_nway_reset(struct net_device *dev)
+{
+	struct bcm_enet_priv *priv;
+
+	priv = netdev_priv(dev);
+	if (priv->has_phy)
+		return phy_ethtool_nway_reset(dev);
+
+	return -EOPNOTSUPP;
+}
+
+static int bcm_enet_get_link_ksettings(struct net_device *dev,
+				       struct ethtool_link_ksettings *cmd)
+{
+	struct bcm_enet_priv *priv;
+	u32 supported, advertising;
+
+	priv = netdev_priv(dev);
+
+	if (priv->has_phy) {
+		if (!dev->phydev)
+			return -ENODEV;
+
+		phy_ethtool_ksettings_get(dev->phydev, cmd);
+
+		return 0;
+	} else {
+		cmd->base.autoneg = 0;
+		cmd->base.speed = (priv->force_speed_100) ?
+			SPEED_100 : SPEED_10;
+		cmd->base.duplex = (priv->force_duplex_full) ?
+			DUPLEX_FULL : DUPLEX_HALF;
+		supported = ADVERTISED_10baseT_Half |
+			ADVERTISED_10baseT_Full |
+			ADVERTISED_100baseT_Half |
+			ADVERTISED_100baseT_Full;
+		advertising = 0;
+		ethtool_convert_legacy_u32_to_link_mode(
+			cmd->link_modes.supported, supported);
+		ethtool_convert_legacy_u32_to_link_mode(
+			cmd->link_modes.advertising, advertising);
+		cmd->base.port = PORT_MII;
+	}
+	return 0;
+}
+
+static int bcm_enet_set_link_ksettings(struct net_device *dev,
+				       const struct ethtool_link_ksettings *cmd)
+{
+	struct bcm_enet_priv *priv;
+
+	priv = netdev_priv(dev);
+	if (priv->has_phy) {
+		if (!dev->phydev)
+			return -ENODEV;
+		return phy_ethtool_ksettings_set(dev->phydev, cmd);
+	} else {
+
+		if (cmd->base.autoneg ||
+		    (cmd->base.speed != SPEED_100 &&
+		     cmd->base.speed != SPEED_10) ||
+		    cmd->base.port != PORT_MII)
+			return -EINVAL;
+
+		priv->force_speed_100 =
+			(cmd->base.speed == SPEED_100) ? 1 : 0;
+		priv->force_duplex_full =
+			(cmd->base.duplex == DUPLEX_FULL) ? 1 : 0;
+
+		if (netif_running(dev))
+			bcm_enet_adjust_link(dev);
+		return 0;
+	}
+}
+
+static void
+bcm_enet_get_ringparam(struct net_device *dev,
+		       struct ethtool_ringparam *ering,
+		       struct kernel_ethtool_ringparam *kernel_ering,
+		       struct netlink_ext_ack *extack)
+{
+	struct bcm_enet_priv *priv;
+
+	priv = netdev_priv(dev);
+
+	/* rx/tx ring is actually only limited by memory */
+	ering->rx_max_pending = 8192;
+	ering->tx_max_pending = 8192;
+	ering->rx_pending = priv->rx_ring_size;
+	ering->tx_pending = priv->tx_ring_size;
+}
+
+static int bcm_enet_set_ringparam(struct net_device *dev,
+				  struct ethtool_ringparam *ering,
+				  struct kernel_ethtool_ringparam *kernel_ering,
+				  struct netlink_ext_ack *extack)
+{
+	struct bcm_enet_priv *priv;
+	int was_running;
+
+	priv = netdev_priv(dev);
+
+	was_running = 0;
+	if (netif_running(dev)) {
+		bcm_enet_stop(dev);
+		was_running = 1;
+	}
+
+	priv->rx_ring_size = ering->rx_pending;
+	priv->tx_ring_size = ering->tx_pending;
+
+	if (was_running) {
+		int err;
+
+		err = bcm_enet_open(dev);
+		if (err)
+			dev_close(dev);
+		else
+			bcm_enet_set_multicast_list(dev);
+	}
+	return 0;
+}
+
+static void bcm_enet_get_pauseparam(struct net_device *dev,
+				    struct ethtool_pauseparam *ecmd)
+{
+	struct bcm_enet_priv *priv;
+
+	priv = netdev_priv(dev);
+	ecmd->autoneg = priv->pause_auto;
+	ecmd->rx_pause = priv->pause_rx;
+	ecmd->tx_pause = priv->pause_tx;
+}
+
+static int bcm_enet_set_pauseparam(struct net_device *dev,
+				   struct ethtool_pauseparam *ecmd)
+{
+	struct bcm_enet_priv *priv;
+
+	priv = netdev_priv(dev);
+
+	if (priv->has_phy) {
+		if (ecmd->autoneg && (ecmd->rx_pause != ecmd->tx_pause)) {
+			/* asymetric pause mode not supported,
+			 * actually possible but integrated PHY has RO
+			 * asym_pause bit */
+			return -EINVAL;
+		}
+	} else {
+		/* no pause autoneg on direct mii connection */
+		if (ecmd->autoneg)
+			return -EINVAL;
+	}
+
+	priv->pause_auto = ecmd->autoneg;
+	priv->pause_rx = ecmd->rx_pause;
+	priv->pause_tx = ecmd->tx_pause;
+
+	return 0;
+}
+
+static const struct ethtool_ops bcm_enet_ethtool_ops = {
+	.get_strings		= bcm_enet_get_strings,
+	.get_sset_count		= bcm_enet_get_sset_count,
+	.get_ethtool_stats      = bcm_enet_get_ethtool_stats,
+	.nway_reset		= bcm_enet_nway_reset,
+	.get_drvinfo		= bcm_enet_get_drvinfo,
+	.get_link		= ethtool_op_get_link,
+	.get_ringparam		= bcm_enet_get_ringparam,
+	.set_ringparam		= bcm_enet_set_ringparam,
+	.get_pauseparam		= bcm_enet_get_pauseparam,
+	.set_pauseparam		= bcm_enet_set_pauseparam,
+	.get_link_ksettings	= bcm_enet_get_link_ksettings,
+	.set_link_ksettings	= bcm_enet_set_link_ksettings,
+};
+
+static int bcm_enet_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
+{
+	struct bcm_enet_priv *priv;
+
+	priv = netdev_priv(dev);
+	if (priv->has_phy) {
+		if (!dev->phydev)
+			return -ENODEV;
+		return phy_mii_ioctl(dev->phydev, rq, cmd);
+	} else {
+		struct mii_if_info mii;
+
+		mii.dev = dev;
+		mii.mdio_read = bcm_enet_mdio_read_mii;
+		mii.mdio_write = bcm_enet_mdio_write_mii;
+		mii.phy_id = 0;
+		mii.phy_id_mask = 0x3f;
+		mii.reg_num_mask = 0x1f;
+		return generic_mii_ioctl(&mii, if_mii(rq), cmd, NULL);
+	}
+}
+
+/*
+ * adjust mtu, can't be called while device is running
+ */
+static int bcm_enet_change_mtu(struct net_device *dev, int new_mtu)
+{
+	struct bcm_enet_priv *priv = netdev_priv(dev);
+	int actual_mtu = new_mtu;
+
+	if (netif_running(dev))
+		return -EBUSY;
+
+	/* add ethernet header + vlan tag size */
+	actual_mtu += VLAN_ETH_HLEN;
+
+	/*
+	 * setup maximum size before we get overflow mark in
+	 * descriptor, note that this will not prevent reception of
+	 * big frames, they will be split into multiple buffers
+	 * anyway
+	 */
+	priv->hw_mtu = actual_mtu;
+
+	/*
+	 * align rx buffer size to dma burst len, account FCS since
+	 * it's appended
+	 */
+	priv->rx_buf_size = ALIGN(actual_mtu + ETH_FCS_LEN,
+				  priv->dma_maxburst * 4);
+
+	priv->rx_frag_size = SKB_DATA_ALIGN(priv->rx_buf_offset + priv->rx_buf_size) +
+					    SKB_DATA_ALIGN(sizeof(struct skb_shared_info));
+
+	dev->mtu = new_mtu;
+	return 0;
+}
+
+/*
+ * preinit hardware to allow mii operation while device is down
+ */
+static void bcm_enet_hw_preinit(struct bcm_enet_priv *priv)
+{
+	u32 val;
+	int limit;
+
+	/* make sure mac is disabled */
+	bcm_enet_disable_mac(priv);
+
+	/* soft reset mac */
+	val = ENET_CTL_SRESET_MASK;
+	enet_writel(priv, val, ENET_CTL_REG);
+	wmb();
+
+	limit = 1000;
+	do {
+		val = enet_readl(priv, ENET_CTL_REG);
+		if (!(val & ENET_CTL_SRESET_MASK))
+			break;
+		udelay(1);
+	} while (limit--);
+
+	/* select correct mii interface */
+	val = enet_readl(priv, ENET_CTL_REG);
+	if (priv->use_external_mii)
+		val |= ENET_CTL_EPHYSEL_MASK;
+	else
+		val &= ~ENET_CTL_EPHYSEL_MASK;
+	enet_writel(priv, val, ENET_CTL_REG);
+
+	/* turn on mdc clock */
+	enet_writel(priv, (0x1f << ENET_MIISC_MDCFREQDIV_SHIFT) |
+		    ENET_MIISC_PREAMBLEEN_MASK, ENET_MIISC_REG);
+
+	/* set mib counters to self-clear when read */
+	val = enet_readl(priv, ENET_MIBCTL_REG);
+	val |= ENET_MIBCTL_RDCLEAR_MASK;
+	enet_writel(priv, val, ENET_MIBCTL_REG);
+}
+
+static const struct net_device_ops bcm_enet_ops = {
+	.ndo_open		= bcm_enet_open,
+	.ndo_stop		= bcm_enet_stop,
+	.ndo_start_xmit		= bcm_enet_start_xmit,
+	.ndo_set_mac_address	= bcm_enet_set_mac_address,
+	.ndo_set_rx_mode	= bcm_enet_set_multicast_list,
+	.ndo_eth_ioctl		= bcm_enet_ioctl,
+	.ndo_change_mtu		= bcm_enet_change_mtu,
+};
+
+/*
+ * allocate netdevice, request register memory and register device.
+ */
+static int bcm_enet_probe(struct platform_device *pdev)
+{
+	struct bcm_enet_priv *priv;
+	struct net_device *dev;
+	struct bcm63xx_enet_platform_data *pd;
+	int irq, irq_rx, irq_tx;
+	struct mii_bus *bus;
+	int i, ret;
+
+	if (!bcm_enet_shared_base[0])
+		return -EPROBE_DEFER;
+
+	irq = platform_get_irq(pdev, 0);
+	irq_rx = platform_get_irq(pdev, 1);
+	irq_tx = platform_get_irq(pdev, 2);
+	if (irq < 0 || irq_rx < 0 || irq_tx < 0)
+		return -ENODEV;
+
+	dev = alloc_etherdev(sizeof(*priv));
+	if (!dev)
+		return -ENOMEM;
+	priv = netdev_priv(dev);
+
+	priv->enet_is_sw = false;
+	priv->dma_maxburst = BCMENET_DMA_MAXBURST;
+	priv->rx_buf_offset = NET_SKB_PAD;
+
+	ret = bcm_enet_change_mtu(dev, dev->mtu);
+	if (ret)
+		goto out;
+
+	priv->base = devm_platform_ioremap_resource(pdev, 0);
+	if (IS_ERR(priv->base)) {
+		ret = PTR_ERR(priv->base);
+		goto out;
+	}
+
+	dev->irq = priv->irq = irq;
+	priv->irq_rx = irq_rx;
+	priv->irq_tx = irq_tx;
+
+	priv->mac_clk = devm_clk_get(&pdev->dev, "enet");
+	if (IS_ERR(priv->mac_clk)) {
+		ret = PTR_ERR(priv->mac_clk);
+		goto out;
+	}
+	ret = clk_prepare_enable(priv->mac_clk);
+	if (ret)
+		goto out;
+
+	/* initialize default and fetch platform data */
+	priv->rx_ring_size = BCMENET_DEF_RX_DESC;
+	priv->tx_ring_size = BCMENET_DEF_TX_DESC;
+
+	pd = dev_get_platdata(&pdev->dev);
+	if (pd) {
+		eth_hw_addr_set(dev, pd->mac_addr);
+		priv->has_phy = pd->has_phy;
+		priv->phy_id = pd->phy_id;
+		priv->has_phy_interrupt = pd->has_phy_interrupt;
+		priv->phy_interrupt = pd->phy_interrupt;
+		priv->use_external_mii = !pd->use_internal_phy;
+		priv->pause_auto = pd->pause_auto;
+		priv->pause_rx = pd->pause_rx;
+		priv->pause_tx = pd->pause_tx;
+		priv->force_duplex_full = pd->force_duplex_full;
+		priv->force_speed_100 = pd->force_speed_100;
+		priv->dma_chan_en_mask = pd->dma_chan_en_mask;
+		priv->dma_chan_int_mask = pd->dma_chan_int_mask;
+		priv->dma_chan_width = pd->dma_chan_width;
+		priv->dma_has_sram = pd->dma_has_sram;
+		priv->dma_desc_shift = pd->dma_desc_shift;
+		priv->rx_chan = pd->rx_chan;
+		priv->tx_chan = pd->tx_chan;
+	}
+
+	if (priv->has_phy && !priv->use_external_mii) {
+		/* using internal PHY, enable clock */
+		priv->phy_clk = devm_clk_get(&pdev->dev, "ephy");
+		if (IS_ERR(priv->phy_clk)) {
+			ret = PTR_ERR(priv->phy_clk);
+			priv->phy_clk = NULL;
+			goto out_disable_clk_mac;
+		}
+		ret = clk_prepare_enable(priv->phy_clk);
+		if (ret)
+			goto out_disable_clk_mac;
+	}
+
+	/* do minimal hardware init to be able to probe mii bus */
+	bcm_enet_hw_preinit(priv);
+
+	/* MII bus registration */
+	if (priv->has_phy) {
+
+		priv->mii_bus = mdiobus_alloc();
+		if (!priv->mii_bus) {
+			ret = -ENOMEM;
+			goto out_uninit_hw;
+		}
+
+		bus = priv->mii_bus;
+		bus->name = "bcm63xx_enet MII bus";
+		bus->parent = &pdev->dev;
+		bus->priv = priv;
+		bus->read = bcm_enet_mdio_read_phylib;
+		bus->write = bcm_enet_mdio_write_phylib;
+		sprintf(bus->id, "%s-%d", pdev->name, pdev->id);
+
+		/* only probe bus where we think the PHY is, because
+		 * the mdio read operation return 0 instead of 0xffff
+		 * if a slave is not present on hw */
+		bus->phy_mask = ~(1 << priv->phy_id);
+
+		if (priv->has_phy_interrupt)
+			bus->irq[priv->phy_id] = priv->phy_interrupt;
+
+		ret = mdiobus_register(bus);
+		if (ret) {
+			dev_err(&pdev->dev, "unable to register mdio bus\n");
+			goto out_free_mdio;
+		}
+	} else {
+
+		/* run platform code to initialize PHY device */
+		if (pd && pd->mii_config &&
+		    pd->mii_config(dev, 1, bcm_enet_mdio_read_mii,
+				   bcm_enet_mdio_write_mii)) {
+			dev_err(&pdev->dev, "unable to configure mdio bus\n");
+			goto out_uninit_hw;
+		}
+	}
+
+	spin_lock_init(&priv->rx_lock);
+
+	/* init rx timeout (used for oom) */
+	timer_setup(&priv->rx_timeout, bcm_enet_refill_rx_timer, 0);
+
+	/* init the mib update lock&work */
+	mutex_init(&priv->mib_update_lock);
+	INIT_WORK(&priv->mib_update_task, bcm_enet_update_mib_counters_defer);
+
+	/* zero mib counters */
+	for (i = 0; i < ENET_MIB_REG_COUNT; i++)
+		enet_writel(priv, 0, ENET_MIB_REG(i));
+
+	/* register netdevice */
+	dev->netdev_ops = &bcm_enet_ops;
+	netif_napi_add_weight(dev, &priv->napi, bcm_enet_poll, 16);
+
+	dev->ethtool_ops = &bcm_enet_ethtool_ops;
+	/* MTU range: 46 - 2028 */
+	dev->min_mtu = ETH_ZLEN - ETH_HLEN;
+	dev->max_mtu = BCMENET_MAX_MTU - VLAN_ETH_HLEN;
+	SET_NETDEV_DEV(dev, &pdev->dev);
+
+	ret = register_netdev(dev);
+	if (ret)
+		goto out_unregister_mdio;
+
+	netif_carrier_off(dev);
+	platform_set_drvdata(pdev, dev);
+	priv->pdev = pdev;
+	priv->net_dev = dev;
+
+	return 0;
+
+out_unregister_mdio:
+	if (priv->mii_bus)
+		mdiobus_unregister(priv->mii_bus);
+
+out_free_mdio:
+	if (priv->mii_bus)
+		mdiobus_free(priv->mii_bus);
+
+out_uninit_hw:
+	/* turn off mdc clock */
+	enet_writel(priv, 0, ENET_MIISC_REG);
+	clk_disable_unprepare(priv->phy_clk);
+
+out_disable_clk_mac:
+	clk_disable_unprepare(priv->mac_clk);
+out:
+	free_netdev(dev);
+	return ret;
+}
+
+
+/*
+ * exit func, stops hardware and unregisters netdevice
+ */
+static int bcm_enet_remove(struct platform_device *pdev)
+{
+	struct bcm_enet_priv *priv;
+	struct net_device *dev;
+
+	/* stop netdevice */
+	dev = platform_get_drvdata(pdev);
+	priv = netdev_priv(dev);
+	unregister_netdev(dev);
+
+	/* turn off mdc clock */
+	enet_writel(priv, 0, ENET_MIISC_REG);
+
+	if (priv->has_phy) {
+		mdiobus_unregister(priv->mii_bus);
+		mdiobus_free(priv->mii_bus);
+	} else {
+		struct bcm63xx_enet_platform_data *pd;
+
+		pd = dev_get_platdata(&pdev->dev);
+		if (pd && pd->mii_config)
+			pd->mii_config(dev, 0, bcm_enet_mdio_read_mii,
+				       bcm_enet_mdio_write_mii);
+	}
+
+	/* disable hw block clocks */
+	clk_disable_unprepare(priv->phy_clk);
+	clk_disable_unprepare(priv->mac_clk);
+
+	free_netdev(dev);
+	return 0;
+}
+
+static struct platform_driver bcm63xx_enet_driver = {
+	.probe	= bcm_enet_probe,
+	.remove	= bcm_enet_remove,
+	.driver	= {
+		.name	= "bcm63xx_enet",
+		.owner  = THIS_MODULE,
+	},
+};
+
+/*
+ * switch mii access callbacks
+ */
+static int bcmenet_sw_mdio_read(struct bcm_enet_priv *priv,
+				int ext, int phy_id, int location)
+{
+	u32 reg;
+	int ret;
+
+	spin_lock_bh(&priv->enetsw_mdio_lock);
+	enetsw_writel(priv, 0, ENETSW_MDIOC_REG);
+
+	reg = ENETSW_MDIOC_RD_MASK |
+		(phy_id << ENETSW_MDIOC_PHYID_SHIFT) |
+		(location << ENETSW_MDIOC_REG_SHIFT);
+
+	if (ext)
+		reg |= ENETSW_MDIOC_EXT_MASK;
+
+	enetsw_writel(priv, reg, ENETSW_MDIOC_REG);
+	udelay(50);
+	ret = enetsw_readw(priv, ENETSW_MDIOD_REG);
+	spin_unlock_bh(&priv->enetsw_mdio_lock);
+	return ret;
+}
+
+static void bcmenet_sw_mdio_write(struct bcm_enet_priv *priv,
+				 int ext, int phy_id, int location,
+				 uint16_t data)
+{
+	u32 reg;
+
+	spin_lock_bh(&priv->enetsw_mdio_lock);
+	enetsw_writel(priv, 0, ENETSW_MDIOC_REG);
+
+	reg = ENETSW_MDIOC_WR_MASK |
+		(phy_id << ENETSW_MDIOC_PHYID_SHIFT) |
+		(location << ENETSW_MDIOC_REG_SHIFT);
+
+	if (ext)
+		reg |= ENETSW_MDIOC_EXT_MASK;
+
+	reg |= data;
+
+	enetsw_writel(priv, reg, ENETSW_MDIOC_REG);
+	udelay(50);
+	spin_unlock_bh(&priv->enetsw_mdio_lock);
+}
+
+static inline int bcm_enet_port_is_rgmii(int portid)
+{
+	return portid >= ENETSW_RGMII_PORT0;
+}
+
+/*
+ * enet sw PHY polling
+ */
+static void swphy_poll_timer(struct timer_list *t)
+{
+	struct bcm_enet_priv *priv = from_timer(priv, t, swphy_poll);
+	unsigned int i;
+
+	for (i = 0; i < priv->num_ports; i++) {
+		struct bcm63xx_enetsw_port *port;
+		int val, j, up, advertise, lpa, speed, duplex, media;
+		int external_phy = bcm_enet_port_is_rgmii(i);
+		u8 override;
+
+		port = &priv->used_ports[i];
+		if (!port->used)
+			continue;
+
+		if (port->bypass_link)
+			continue;
+
+		/* dummy read to clear */
+		for (j = 0; j < 2; j++)
+			val = bcmenet_sw_mdio_read(priv, external_phy,
+						   port->phy_id, MII_BMSR);
+
+		if (val == 0xffff)
+			continue;
+
+		up = (val & BMSR_LSTATUS) ? 1 : 0;
+		if (!(up ^ priv->sw_port_link[i]))
+			continue;
+
+		priv->sw_port_link[i] = up;
+
+		/* link changed */
+		if (!up) {
+			dev_info(&priv->pdev->dev, "link DOWN on %s\n",
+				 port->name);
+			enetsw_writeb(priv, ENETSW_PORTOV_ENABLE_MASK,
+				      ENETSW_PORTOV_REG(i));
+			enetsw_writeb(priv, ENETSW_PTCTRL_RXDIS_MASK |
+				      ENETSW_PTCTRL_TXDIS_MASK,
+				      ENETSW_PTCTRL_REG(i));
+			continue;
+		}
+
+		advertise = bcmenet_sw_mdio_read(priv, external_phy,
+						 port->phy_id, MII_ADVERTISE);
+
+		lpa = bcmenet_sw_mdio_read(priv, external_phy, port->phy_id,
+					   MII_LPA);
+
+		/* figure out media and duplex from advertise and LPA values */
+		media = mii_nway_result(lpa & advertise);
+		duplex = (media & ADVERTISE_FULL) ? 1 : 0;
+
+		if (media & (ADVERTISE_100FULL | ADVERTISE_100HALF))
+			speed = 100;
+		else
+			speed = 10;
+
+		if (val & BMSR_ESTATEN) {
+			advertise = bcmenet_sw_mdio_read(priv, external_phy,
+						port->phy_id, MII_CTRL1000);
+
+			lpa = bcmenet_sw_mdio_read(priv, external_phy,
+						port->phy_id, MII_STAT1000);
+
+			if (advertise & (ADVERTISE_1000FULL | ADVERTISE_1000HALF)
+					&& lpa & (LPA_1000FULL | LPA_1000HALF)) {
+				speed = 1000;
+				duplex = (lpa & LPA_1000FULL);
+			}
+		}
+
+		dev_info(&priv->pdev->dev,
+			 "link UP on %s, %dMbps, %s-duplex\n",
+			 port->name, speed, duplex ? "full" : "half");
+
+		override = ENETSW_PORTOV_ENABLE_MASK |
+			ENETSW_PORTOV_LINKUP_MASK;
+
+		if (speed == 1000)
+			override |= ENETSW_IMPOV_1000_MASK;
+		else if (speed == 100)
+			override |= ENETSW_IMPOV_100_MASK;
+		if (duplex)
+			override |= ENETSW_IMPOV_FDX_MASK;
+
+		enetsw_writeb(priv, override, ENETSW_PORTOV_REG(i));
+		enetsw_writeb(priv, 0, ENETSW_PTCTRL_REG(i));
+	}
+
+	priv->swphy_poll.expires = jiffies + HZ;
+	add_timer(&priv->swphy_poll);
+}
+
+/*
+ * open callback, allocate dma rings & buffers and start rx operation
+ */
+static int bcm_enetsw_open(struct net_device *dev)
+{
+	struct bcm_enet_priv *priv;
+	struct device *kdev;
+	int i, ret;
+	unsigned int size;
+	void *p;
+	u32 val;
+
+	priv = netdev_priv(dev);
+	kdev = &priv->pdev->dev;
+
+	/* mask all interrupts and request them */
+	enet_dmac_writel(priv, 0, ENETDMAC_IRMASK, priv->rx_chan);
+	enet_dmac_writel(priv, 0, ENETDMAC_IRMASK, priv->tx_chan);
+
+	ret = request_irq(priv->irq_rx, bcm_enet_isr_dma,
+			  0, dev->name, dev);
+	if (ret)
+		goto out_freeirq;
+
+	if (priv->irq_tx != -1) {
+		ret = request_irq(priv->irq_tx, bcm_enet_isr_dma,
+				  0, dev->name, dev);
+		if (ret)
+			goto out_freeirq_rx;
+	}
+
+	/* allocate rx dma ring */
+	size = priv->rx_ring_size * sizeof(struct bcm_enet_desc);
+	p = dma_alloc_coherent(kdev, size, &priv->rx_desc_dma, GFP_KERNEL);
+	if (!p) {
+		dev_err(kdev, "cannot allocate rx ring %u\n", size);
+		ret = -ENOMEM;
+		goto out_freeirq_tx;
+	}
+
+	priv->rx_desc_alloc_size = size;
+	priv->rx_desc_cpu = p;
+
+	/* allocate tx dma ring */
+	size = priv->tx_ring_size * sizeof(struct bcm_enet_desc);
+	p = dma_alloc_coherent(kdev, size, &priv->tx_desc_dma, GFP_KERNEL);
+	if (!p) {
+		dev_err(kdev, "cannot allocate tx ring\n");
+		ret = -ENOMEM;
+		goto out_free_rx_ring;
+	}
+
+	priv->tx_desc_alloc_size = size;
+	priv->tx_desc_cpu = p;
+
+	priv->tx_skb = kcalloc(priv->tx_ring_size, sizeof(struct sk_buff *),
+			       GFP_KERNEL);
+	if (!priv->tx_skb) {
+		dev_err(kdev, "cannot allocate tx skb queue\n");
+		ret = -ENOMEM;
+		goto out_free_tx_ring;
+	}
+
+	priv->tx_desc_count = priv->tx_ring_size;
+	priv->tx_dirty_desc = 0;
+	priv->tx_curr_desc = 0;
+	spin_lock_init(&priv->tx_lock);
+
+	/* init & fill rx ring with buffers */
+	priv->rx_buf = kcalloc(priv->rx_ring_size, sizeof(void *),
+			       GFP_KERNEL);
+	if (!priv->rx_buf) {
+		dev_err(kdev, "cannot allocate rx buffer queue\n");
+		ret = -ENOMEM;
+		goto out_free_tx_skb;
+	}
+
+	priv->rx_desc_count = 0;
+	priv->rx_dirty_desc = 0;
+	priv->rx_curr_desc = 0;
+
+	/* disable all ports */
+	for (i = 0; i < priv->num_ports; i++) {
+		enetsw_writeb(priv, ENETSW_PORTOV_ENABLE_MASK,
+			      ENETSW_PORTOV_REG(i));
+		enetsw_writeb(priv, ENETSW_PTCTRL_RXDIS_MASK |
+			      ENETSW_PTCTRL_TXDIS_MASK,
+			      ENETSW_PTCTRL_REG(i));
+
+		priv->sw_port_link[i] = 0;
+	}
+
+	/* reset mib */
+	val = enetsw_readb(priv, ENETSW_GMCR_REG);
+	val |= ENETSW_GMCR_RST_MIB_MASK;
+	enetsw_writeb(priv, val, ENETSW_GMCR_REG);
+	mdelay(1);
+	val &= ~ENETSW_GMCR_RST_MIB_MASK;
+	enetsw_writeb(priv, val, ENETSW_GMCR_REG);
+	mdelay(1);
+
+	/* force CPU port state */
+	val = enetsw_readb(priv, ENETSW_IMPOV_REG);
+	val |= ENETSW_IMPOV_FORCE_MASK | ENETSW_IMPOV_LINKUP_MASK;
+	enetsw_writeb(priv, val, ENETSW_IMPOV_REG);
+
+	/* enable switch forward engine */
+	val = enetsw_readb(priv, ENETSW_SWMODE_REG);
+	val |= ENETSW_SWMODE_FWD_EN_MASK;
+	enetsw_writeb(priv, val, ENETSW_SWMODE_REG);
+
+	/* enable jumbo on all ports */
+	enetsw_writel(priv, 0x1ff, ENETSW_JMBCTL_PORT_REG);
+	enetsw_writew(priv, 9728, ENETSW_JMBCTL_MAXSIZE_REG);
+
+	/* initialize flow control buffer allocation */
+	enet_dma_writel(priv, ENETDMA_BUFALLOC_FORCE_MASK | 0,
+			ENETDMA_BUFALLOC_REG(priv->rx_chan));
+
+	if (bcm_enet_refill_rx(dev, false)) {
+		dev_err(kdev, "cannot allocate rx buffer queue\n");
+		ret = -ENOMEM;
+		goto out;
+	}
+
+	/* write rx & tx ring addresses */
+	enet_dmas_writel(priv, priv->rx_desc_dma,
+			 ENETDMAS_RSTART_REG, priv->rx_chan);
+	enet_dmas_writel(priv, priv->tx_desc_dma,
+			 ENETDMAS_RSTART_REG, priv->tx_chan);
+
+	/* clear remaining state ram for rx & tx channel */
+	enet_dmas_writel(priv, 0, ENETDMAS_SRAM2_REG, priv->rx_chan);
+	enet_dmas_writel(priv, 0, ENETDMAS_SRAM2_REG, priv->tx_chan);
+	enet_dmas_writel(priv, 0, ENETDMAS_SRAM3_REG, priv->rx_chan);
+	enet_dmas_writel(priv, 0, ENETDMAS_SRAM3_REG, priv->tx_chan);
+	enet_dmas_writel(priv, 0, ENETDMAS_SRAM4_REG, priv->rx_chan);
+	enet_dmas_writel(priv, 0, ENETDMAS_SRAM4_REG, priv->tx_chan);
+
+	/* set dma maximum burst len */
+	enet_dmac_writel(priv, priv->dma_maxburst,
+			 ENETDMAC_MAXBURST, priv->rx_chan);
+	enet_dmac_writel(priv, priv->dma_maxburst,
+			 ENETDMAC_MAXBURST, priv->tx_chan);
+
+	/* set flow control low/high threshold to 1/3 / 2/3 */
+	val = priv->rx_ring_size / 3;
+	enet_dma_writel(priv, val, ENETDMA_FLOWCL_REG(priv->rx_chan));
+	val = (priv->rx_ring_size * 2) / 3;
+	enet_dma_writel(priv, val, ENETDMA_FLOWCH_REG(priv->rx_chan));
+
+	/* all set, enable mac and interrupts, start dma engine and
+	 * kick rx dma channel
+	 */
+	wmb();
+	enet_dma_writel(priv, ENETDMA_CFG_EN_MASK, ENETDMA_CFG_REG);
+	enet_dmac_writel(priv, ENETDMAC_CHANCFG_EN_MASK,
+			 ENETDMAC_CHANCFG, priv->rx_chan);
+
+	/* watch "packet transferred" interrupt in rx and tx */
+	enet_dmac_writel(priv, ENETDMAC_IR_PKTDONE_MASK,
+			 ENETDMAC_IR, priv->rx_chan);
+	enet_dmac_writel(priv, ENETDMAC_IR_PKTDONE_MASK,
+			 ENETDMAC_IR, priv->tx_chan);
+
+	/* make sure we enable napi before rx interrupt  */
+	napi_enable(&priv->napi);
+
+	enet_dmac_writel(priv, ENETDMAC_IR_PKTDONE_MASK,
+			 ENETDMAC_IRMASK, priv->rx_chan);
+	enet_dmac_writel(priv, ENETDMAC_IR_PKTDONE_MASK,
+			 ENETDMAC_IRMASK, priv->tx_chan);
+
+	netif_carrier_on(dev);
+	netif_start_queue(dev);
+
+	/* apply override config for bypass_link ports here. */
+	for (i = 0; i < priv->num_ports; i++) {
+		struct bcm63xx_enetsw_port *port;
+		u8 override;
+		port = &priv->used_ports[i];
+		if (!port->used)
+			continue;
+
+		if (!port->bypass_link)
+			continue;
+
+		override = ENETSW_PORTOV_ENABLE_MASK |
+			ENETSW_PORTOV_LINKUP_MASK;
+
+		switch (port->force_speed) {
+		case 1000:
+			override |= ENETSW_IMPOV_1000_MASK;
+			break;
+		case 100:
+			override |= ENETSW_IMPOV_100_MASK;
+			break;
+		case 10:
+			break;
+		default:
+			pr_warn("invalid forced speed on port %s: assume 10\n",
+			       port->name);
+			break;
+		}
+
+		if (port->force_duplex_full)
+			override |= ENETSW_IMPOV_FDX_MASK;
+
+
+		enetsw_writeb(priv, override, ENETSW_PORTOV_REG(i));
+		enetsw_writeb(priv, 0, ENETSW_PTCTRL_REG(i));
+	}
+
+	/* start phy polling timer */
+	timer_setup(&priv->swphy_poll, swphy_poll_timer, 0);
+	mod_timer(&priv->swphy_poll, jiffies);
+	return 0;
+
+out:
+	bcm_enet_free_rx_buf_ring(kdev, priv);
+
+out_free_tx_skb:
+	kfree(priv->tx_skb);
+
+out_free_tx_ring:
+	dma_free_coherent(kdev, priv->tx_desc_alloc_size,
+			  priv->tx_desc_cpu, priv->tx_desc_dma);
+
+out_free_rx_ring:
+	dma_free_coherent(kdev, priv->rx_desc_alloc_size,
+			  priv->rx_desc_cpu, priv->rx_desc_dma);
+
+out_freeirq_tx:
+	if (priv->irq_tx != -1)
+		free_irq(priv->irq_tx, dev);
+
+out_freeirq_rx:
+	free_irq(priv->irq_rx, dev);
+
+out_freeirq:
+	return ret;
+}
+
+/* stop callback */
+static int bcm_enetsw_stop(struct net_device *dev)
+{
+	struct bcm_enet_priv *priv;
+	struct device *kdev;
+
+	priv = netdev_priv(dev);
+	kdev = &priv->pdev->dev;
+
+	del_timer_sync(&priv->swphy_poll);
+	netif_stop_queue(dev);
+	napi_disable(&priv->napi);
+	del_timer_sync(&priv->rx_timeout);
+
+	/* mask all interrupts */
+	enet_dmac_writel(priv, 0, ENETDMAC_IRMASK, priv->rx_chan);
+	enet_dmac_writel(priv, 0, ENETDMAC_IRMASK, priv->tx_chan);
+
+	/* disable dma & mac */
+	bcm_enet_disable_dma(priv, priv->tx_chan);
+	bcm_enet_disable_dma(priv, priv->rx_chan);
+
+	/* force reclaim of all tx buffers */
+	bcm_enet_tx_reclaim(dev, 1, 0);
+
+	/* free the rx buffer ring */
+	bcm_enet_free_rx_buf_ring(kdev, priv);
+
+	/* free remaining allocated memory */
+	kfree(priv->tx_skb);
+	dma_free_coherent(kdev, priv->rx_desc_alloc_size,
+			  priv->rx_desc_cpu, priv->rx_desc_dma);
+	dma_free_coherent(kdev, priv->tx_desc_alloc_size,
+			  priv->tx_desc_cpu, priv->tx_desc_dma);
+	if (priv->irq_tx != -1)
+		free_irq(priv->irq_tx, dev);
+	free_irq(priv->irq_rx, dev);
+
+	/* reset BQL after forced tx reclaim to prevent kernel panic */
+	netdev_reset_queue(dev);
+
+	return 0;
+}
+
+/* try to sort out phy external status by walking the used_port field
+ * in the bcm_enet_priv structure. in case the phy address is not
+ * assigned to any physical port on the switch, assume it is external
+ * (and yell at the user).
+ */
+static int bcm_enetsw_phy_is_external(struct bcm_enet_priv *priv, int phy_id)
+{
+	int i;
+
+	for (i = 0; i < priv->num_ports; ++i) {
+		if (!priv->used_ports[i].used)
+			continue;
+		if (priv->used_ports[i].phy_id == phy_id)
+			return bcm_enet_port_is_rgmii(i);
+	}
+
+	printk_once(KERN_WARNING  "bcm63xx_enet: could not find a used port with phy_id %i, assuming phy is external\n",
+		    phy_id);
+	return 1;
+}
+
+/* can't use bcmenet_sw_mdio_read directly as we need to sort out
+ * external/internal status of the given phy_id first.
+ */
+static int bcm_enetsw_mii_mdio_read(struct net_device *dev, int phy_id,
+				    int location)
+{
+	struct bcm_enet_priv *priv;
+
+	priv = netdev_priv(dev);
+	return bcmenet_sw_mdio_read(priv,
+				    bcm_enetsw_phy_is_external(priv, phy_id),
+				    phy_id, location);
+}
+
+/* can't use bcmenet_sw_mdio_write directly as we need to sort out
+ * external/internal status of the given phy_id first.
+ */
+static void bcm_enetsw_mii_mdio_write(struct net_device *dev, int phy_id,
+				      int location,
+				      int val)
+{
+	struct bcm_enet_priv *priv;
+
+	priv = netdev_priv(dev);
+	bcmenet_sw_mdio_write(priv, bcm_enetsw_phy_is_external(priv, phy_id),
+			      phy_id, location, val);
+}
+
+static int bcm_enetsw_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
+{
+	struct mii_if_info mii;
+
+	mii.dev = dev;
+	mii.mdio_read = bcm_enetsw_mii_mdio_read;
+	mii.mdio_write = bcm_enetsw_mii_mdio_write;
+	mii.phy_id = 0;
+	mii.phy_id_mask = 0x3f;
+	mii.reg_num_mask = 0x1f;
+	return generic_mii_ioctl(&mii, if_mii(rq), cmd, NULL);
+
+}
+
+static const struct net_device_ops bcm_enetsw_ops = {
+	.ndo_open		= bcm_enetsw_open,
+	.ndo_stop		= bcm_enetsw_stop,
+	.ndo_start_xmit		= bcm_enet_start_xmit,
+	.ndo_change_mtu		= bcm_enet_change_mtu,
+	.ndo_eth_ioctl		= bcm_enetsw_ioctl,
+};
+
+
+static const struct bcm_enet_stats bcm_enetsw_gstrings_stats[] = {
+	{ "rx_packets", DEV_STAT(rx_packets), -1 },
+	{ "tx_packets",	DEV_STAT(tx_packets), -1 },
+	{ "rx_bytes", DEV_STAT(rx_bytes), -1 },
+	{ "tx_bytes", DEV_STAT(tx_bytes), -1 },
+	{ "rx_errors", DEV_STAT(rx_errors), -1 },
+	{ "tx_errors", DEV_STAT(tx_errors), -1 },
+	{ "rx_dropped",	DEV_STAT(rx_dropped), -1 },
+	{ "tx_dropped",	DEV_STAT(tx_dropped), -1 },
+
+	{ "tx_good_octets", GEN_STAT(mib.tx_gd_octets), ETHSW_MIB_RX_GD_OCT },
+	{ "tx_unicast", GEN_STAT(mib.tx_unicast), ETHSW_MIB_RX_BRDCAST },
+	{ "tx_broadcast", GEN_STAT(mib.tx_brdcast), ETHSW_MIB_RX_BRDCAST },
+	{ "tx_multicast", GEN_STAT(mib.tx_mult), ETHSW_MIB_RX_MULT },
+	{ "tx_64_octets", GEN_STAT(mib.tx_64), ETHSW_MIB_RX_64 },
+	{ "tx_65_127_oct", GEN_STAT(mib.tx_65_127), ETHSW_MIB_RX_65_127 },
+	{ "tx_128_255_oct", GEN_STAT(mib.tx_128_255), ETHSW_MIB_RX_128_255 },
+	{ "tx_256_511_oct", GEN_STAT(mib.tx_256_511), ETHSW_MIB_RX_256_511 },
+	{ "tx_512_1023_oct", GEN_STAT(mib.tx_512_1023), ETHSW_MIB_RX_512_1023},
+	{ "tx_1024_1522_oct", GEN_STAT(mib.tx_1024_max),
+	  ETHSW_MIB_RX_1024_1522 },
+	{ "tx_1523_2047_oct", GEN_STAT(mib.tx_1523_2047),
+	  ETHSW_MIB_RX_1523_2047 },
+	{ "tx_2048_4095_oct", GEN_STAT(mib.tx_2048_4095),
+	  ETHSW_MIB_RX_2048_4095 },
+	{ "tx_4096_8191_oct", GEN_STAT(mib.tx_4096_8191),
+	  ETHSW_MIB_RX_4096_8191 },
+	{ "tx_8192_9728_oct", GEN_STAT(mib.tx_8192_9728),
+	  ETHSW_MIB_RX_8192_9728 },
+	{ "tx_oversize", GEN_STAT(mib.tx_ovr), ETHSW_MIB_RX_OVR },
+	{ "tx_oversize_drop", GEN_STAT(mib.tx_ovr), ETHSW_MIB_RX_OVR_DISC },
+	{ "tx_dropped",	GEN_STAT(mib.tx_drop), ETHSW_MIB_RX_DROP },
+	{ "tx_undersize", GEN_STAT(mib.tx_underrun), ETHSW_MIB_RX_UND },
+	{ "tx_pause", GEN_STAT(mib.tx_pause), ETHSW_MIB_RX_PAUSE },
+
+	{ "rx_good_octets", GEN_STAT(mib.rx_gd_octets), ETHSW_MIB_TX_ALL_OCT },
+	{ "rx_broadcast", GEN_STAT(mib.rx_brdcast), ETHSW_MIB_TX_BRDCAST },
+	{ "rx_multicast", GEN_STAT(mib.rx_mult), ETHSW_MIB_TX_MULT },
+	{ "rx_unicast", GEN_STAT(mib.rx_unicast), ETHSW_MIB_TX_MULT },
+	{ "rx_pause", GEN_STAT(mib.rx_pause), ETHSW_MIB_TX_PAUSE },
+	{ "rx_dropped", GEN_STAT(mib.rx_drop), ETHSW_MIB_TX_DROP_PKTS },
+
+};
+
+#define BCM_ENETSW_STATS_LEN	\
+	(sizeof(bcm_enetsw_gstrings_stats) / sizeof(struct bcm_enet_stats))
+
+static void bcm_enetsw_get_strings(struct net_device *netdev,
+				   u32 stringset, u8 *data)
+{
+	int i;
+
+	switch (stringset) {
+	case ETH_SS_STATS:
+		for (i = 0; i < BCM_ENETSW_STATS_LEN; i++) {
+			memcpy(data + i * ETH_GSTRING_LEN,
+			       bcm_enetsw_gstrings_stats[i].stat_string,
+			       ETH_GSTRING_LEN);
+		}
+		break;
+	}
+}
+
+static int bcm_enetsw_get_sset_count(struct net_device *netdev,
+				     int string_set)
+{
+	switch (string_set) {
+	case ETH_SS_STATS:
+		return BCM_ENETSW_STATS_LEN;
+	default:
+		return -EINVAL;
+	}
+}
+
+static void bcm_enetsw_get_drvinfo(struct net_device *netdev,
+				   struct ethtool_drvinfo *drvinfo)
+{
+	strncpy(drvinfo->driver, bcm_enet_driver_name, sizeof(drvinfo->driver));
+	strncpy(drvinfo->bus_info, "bcm63xx", sizeof(drvinfo->bus_info));
+}
+
+static void bcm_enetsw_get_ethtool_stats(struct net_device *netdev,
+					 struct ethtool_stats *stats,
+					 u64 *data)
+{
+	struct bcm_enet_priv *priv;
+	int i;
+
+	priv = netdev_priv(netdev);
+
+	for (i = 0; i < BCM_ENETSW_STATS_LEN; i++) {
+		const struct bcm_enet_stats *s;
+		u32 lo, hi;
+		char *p;
+		int reg;
+
+		s = &bcm_enetsw_gstrings_stats[i];
+
+		reg = s->mib_reg;
+		if (reg == -1)
+			continue;
+
+		lo = enetsw_readl(priv, ENETSW_MIB_REG(reg));
+		p = (char *)priv + s->stat_offset;
+
+		if (s->sizeof_stat == sizeof(u64)) {
+			hi = enetsw_readl(priv, ENETSW_MIB_REG(reg + 1));
+			*(u64 *)p = ((u64)hi << 32 | lo);
+		} else {
+			*(u32 *)p = lo;
+		}
+	}
+
+	for (i = 0; i < BCM_ENETSW_STATS_LEN; i++) {
+		const struct bcm_enet_stats *s;
+		char *p;
+
+		s = &bcm_enetsw_gstrings_stats[i];
+
+		if (s->mib_reg == -1)
+			p = (char *)&netdev->stats + s->stat_offset;
+		else
+			p = (char *)priv + s->stat_offset;
+
+		data[i] = (s->sizeof_stat == sizeof(u64)) ?
+			*(u64 *)p : *(u32 *)p;
+	}
+}
+
+static void
+bcm_enetsw_get_ringparam(struct net_device *dev,
+			 struct ethtool_ringparam *ering,
+			 struct kernel_ethtool_ringparam *kernel_ering,
+			 struct netlink_ext_ack *extack)
+{
+	struct bcm_enet_priv *priv;
+
+	priv = netdev_priv(dev);
+
+	/* rx/tx ring is actually only limited by memory */
+	ering->rx_max_pending = 8192;
+	ering->tx_max_pending = 8192;
+	ering->rx_mini_max_pending = 0;
+	ering->rx_jumbo_max_pending = 0;
+	ering->rx_pending = priv->rx_ring_size;
+	ering->tx_pending = priv->tx_ring_size;
+}
+
+static int
+bcm_enetsw_set_ringparam(struct net_device *dev,
+			 struct ethtool_ringparam *ering,
+			 struct kernel_ethtool_ringparam *kernel_ering,
+			 struct netlink_ext_ack *extack)
+{
+	struct bcm_enet_priv *priv;
+	int was_running;
+
+	priv = netdev_priv(dev);
+
+	was_running = 0;
+	if (netif_running(dev)) {
+		bcm_enetsw_stop(dev);
+		was_running = 1;
+	}
+
+	priv->rx_ring_size = ering->rx_pending;
+	priv->tx_ring_size = ering->tx_pending;
+
+	if (was_running) {
+		int err;
+
+		err = bcm_enetsw_open(dev);
+		if (err)
+			dev_close(dev);
+	}
+	return 0;
+}
+
+static const struct ethtool_ops bcm_enetsw_ethtool_ops = {
+	.get_strings		= bcm_enetsw_get_strings,
+	.get_sset_count		= bcm_enetsw_get_sset_count,
+	.get_ethtool_stats      = bcm_enetsw_get_ethtool_stats,
+	.get_drvinfo		= bcm_enetsw_get_drvinfo,
+	.get_ringparam		= bcm_enetsw_get_ringparam,
+	.set_ringparam		= bcm_enetsw_set_ringparam,
+};
+
+/* allocate netdevice, request register memory and register device. */
+static int bcm_enetsw_probe(struct platform_device *pdev)
+{
+	struct bcm_enet_priv *priv;
+	struct net_device *dev;
+	struct bcm63xx_enetsw_platform_data *pd;
+	struct resource *res_mem;
+	int ret, irq_rx, irq_tx;
+
+	if (!bcm_enet_shared_base[0])
+		return -EPROBE_DEFER;
+
+	res_mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+	irq_rx = platform_get_irq(pdev, 0);
+	irq_tx = platform_get_irq(pdev, 1);
+	if (!res_mem || irq_rx < 0)
+		return -ENODEV;
+
+	dev = alloc_etherdev(sizeof(*priv));
+	if (!dev)
+		return -ENOMEM;
+	priv = netdev_priv(dev);
+
+	/* initialize default and fetch platform data */
+	priv->enet_is_sw = true;
+	priv->irq_rx = irq_rx;
+	priv->irq_tx = irq_tx;
+	priv->rx_ring_size = BCMENET_DEF_RX_DESC;
+	priv->tx_ring_size = BCMENET_DEF_TX_DESC;
+	priv->dma_maxburst = BCMENETSW_DMA_MAXBURST;
+	priv->rx_buf_offset = NET_SKB_PAD + NET_IP_ALIGN;
+
+	pd = dev_get_platdata(&pdev->dev);
+	if (pd) {
+		eth_hw_addr_set(dev, pd->mac_addr);
+		memcpy(priv->used_ports, pd->used_ports,
+		       sizeof(pd->used_ports));
+		priv->num_ports = pd->num_ports;
+		priv->dma_has_sram = pd->dma_has_sram;
+		priv->dma_chan_en_mask = pd->dma_chan_en_mask;
+		priv->dma_chan_int_mask = pd->dma_chan_int_mask;
+		priv->dma_chan_width = pd->dma_chan_width;
+	}
+
+	ret = bcm_enet_change_mtu(dev, dev->mtu);
+	if (ret)
+		goto out;
+
+	priv->base = devm_ioremap_resource(&pdev->dev, res_mem);
+	if (IS_ERR(priv->base)) {
+		ret = PTR_ERR(priv->base);
+		goto out;
+	}
+
+	priv->mac_clk = devm_clk_get(&pdev->dev, "enetsw");
+	if (IS_ERR(priv->mac_clk)) {
+		ret = PTR_ERR(priv->mac_clk);
+		goto out;
+	}
+	ret = clk_prepare_enable(priv->mac_clk);
+	if (ret)
+		goto out;
+
+	priv->rx_chan = 0;
+	priv->tx_chan = 1;
+	spin_lock_init(&priv->rx_lock);
+
+	/* init rx timeout (used for oom) */
+	timer_setup(&priv->rx_timeout, bcm_enet_refill_rx_timer, 0);
+
+	/* register netdevice */
+	dev->netdev_ops = &bcm_enetsw_ops;
+	netif_napi_add_weight(dev, &priv->napi, bcm_enet_poll, 16);
+	dev->ethtool_ops = &bcm_enetsw_ethtool_ops;
+	SET_NETDEV_DEV(dev, &pdev->dev);
+
+	spin_lock_init(&priv->enetsw_mdio_lock);
+
+	ret = register_netdev(dev);
+	if (ret)
+		goto out_disable_clk;
+
+	netif_carrier_off(dev);
+	platform_set_drvdata(pdev, dev);
+	priv->pdev = pdev;
+	priv->net_dev = dev;
+
+	return 0;
+
+out_disable_clk:
+	clk_disable_unprepare(priv->mac_clk);
+out:
+	free_netdev(dev);
+	return ret;
+}
+
+
+/* exit func, stops hardware and unregisters netdevice */
+static int bcm_enetsw_remove(struct platform_device *pdev)
+{
+	struct bcm_enet_priv *priv;
+	struct net_device *dev;
+
+	/* stop netdevice */
+	dev = platform_get_drvdata(pdev);
+	priv = netdev_priv(dev);
+	unregister_netdev(dev);
+
+	clk_disable_unprepare(priv->mac_clk);
+
+	free_netdev(dev);
+	return 0;
+}
+
+static struct platform_driver bcm63xx_enetsw_driver = {
+	.probe	= bcm_enetsw_probe,
+	.remove	= bcm_enetsw_remove,
+	.driver	= {
+		.name	= "bcm63xx_enetsw",
+		.owner  = THIS_MODULE,
+	},
+};
+
+/* reserve & remap memory space shared between all macs */
+static int bcm_enet_shared_probe(struct platform_device *pdev)
+{
+	void __iomem *p[3];
+	unsigned int i;
+
+	memset(bcm_enet_shared_base, 0, sizeof(bcm_enet_shared_base));
+
+	for (i = 0; i < 3; i++) {
+		p[i] = devm_platform_ioremap_resource(pdev, i);
+		if (IS_ERR(p[i]))
+			return PTR_ERR(p[i]);
+	}
+
+	memcpy(bcm_enet_shared_base, p, sizeof(bcm_enet_shared_base));
+
+	return 0;
+}
+
+static int bcm_enet_shared_remove(struct platform_device *pdev)
+{
+	return 0;
+}
+
+/* this "shared" driver is needed because both macs share a single
+ * address space
+ */
+struct platform_driver bcm63xx_enet_shared_driver = {
+	.probe	= bcm_enet_shared_probe,
+	.remove	= bcm_enet_shared_remove,
+	.driver	= {
+		.name	= "bcm63xx_enet_shared",
+		.owner  = THIS_MODULE,
+	},
+};
+
+static struct platform_driver * const drivers[] = {
+	&bcm63xx_enet_shared_driver,
+	&bcm63xx_enet_driver,
+	&bcm63xx_enetsw_driver,
+};
+
+/* entry point */
+static int __init bcm_enet_init(void)
+{
+	return platform_register_drivers(drivers, ARRAY_SIZE(drivers));
+}
+
+static void __exit bcm_enet_exit(void)
+{
+	platform_unregister_drivers(drivers, ARRAY_SIZE(drivers));
+}
+
+
+module_init(bcm_enet_init);
+module_exit(bcm_enet_exit);
+
+MODULE_DESCRIPTION("BCM63xx internal ethernet mac driver");
+MODULE_AUTHOR("Maxime Bizon <mbizon@freebox.fr>");
+MODULE_LICENSE("GPL");