Add the rt linux 4.1.3-rt3 as base

Import the rt linux 4.1.3-rt3 as OPNFV kvm base.

It's from git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git linux-4.1.y-rt and
the base is:

commit 0917f823c59692d751951bf5ea699a2d1e2f26a2
Author: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Date:   Sat Jul 25 12:13:34 2015 +0200

    Prepare v4.1.3-rt3

    Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>

We lose all the git history this way and it's not good. We
should apply another opnfv project repo in future.

Change-Id: I87543d81c9df70d99c5001fbdf646b202c19f423
Signed-off-by: Yunhong Jiang <yunhong.jiang@intel.com>

3 files changed, 1573 insertions, 0 deletions

diff --git a/kernel/drivers/net/ethernet/xscale/Kconfig b/kernel/drivers/net/ethernet/xscale/Kconfig
new file mode 100644
index 000000000..b81bc9fca
--- /dev/null
+++ b/kernel/drivers/net/ethernet/xscale/Kconfig
@@ -0,0 +1,31 @@
+#
+# Intel XScale IXP device configuration
+#
+
+config NET_VENDOR_XSCALE
+	bool "Intel XScale IXP devices"
+	default y
+	depends on NET_VENDOR_INTEL && (ARM && ARCH_IXP4XX && \
+		   IXP4XX_NPE && IXP4XX_QMGR)
+	---help---
+	  If you have a network (Ethernet) card belonging to this class, say Y
+	  and read the Ethernet-HOWTO, available from
+	  <http://www.tldp.org/docs.html#howto>.
+
+	  Note that the answer to this question does not directly affect the
+	  kernel: saying N will just cause the configurator to skip all
+	  the questions about XSacle IXP devices. If you say Y, you will be
+	  asked for your specific card in the following questions.
+
+if NET_VENDOR_XSCALE
+
+config IXP4XX_ETH
+	tristate "Intel IXP4xx Ethernet support"
+	depends on ARM && ARCH_IXP4XX && IXP4XX_NPE && IXP4XX_QMGR
+	select PHYLIB
+	select NET_PTP_CLASSIFY
+	---help---
+	  Say Y here if you want to use built-in Ethernet ports
+	  on IXP4xx processor.
+
+endif # NET_VENDOR_XSCALE
diff --git a/kernel/drivers/net/ethernet/xscale/Makefile b/kernel/drivers/net/ethernet/xscale/Makefile
new file mode 100644
index 000000000..abc3b031f
--- /dev/null
+++ b/kernel/drivers/net/ethernet/xscale/Makefile
@@ -0,0 +1,5 @@
+#
+# Makefile for the Intel XScale IXP device drivers.
+#
+
+obj-$(CONFIG_IXP4XX_ETH) += ixp4xx_eth.o
diff --git a/kernel/drivers/net/ethernet/xscale/ixp4xx_eth.c b/kernel/drivers/net/ethernet/xscale/ixp4xx_eth.c
new file mode 100644
index 000000000..513840794
--- /dev/null
+++ b/kernel/drivers/net/ethernet/xscale/ixp4xx_eth.c
@@ -0,0 +1,1537 @@
+/*
+ * Intel IXP4xx Ethernet driver for Linux
+ *
+ * Copyright (C) 2007 Krzysztof Halasa <khc@pm.waw.pl>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of version 2 of the GNU General Public License
+ * as published by the Free Software Foundation.
+ *
+ * Ethernet port config (0x00 is not present on IXP42X):
+ *
+ * logical port		0x00		0x10		0x20
+ * NPE			0 (NPE-A)	1 (NPE-B)	2 (NPE-C)
+ * physical PortId	2		0		1
+ * TX queue		23		24		25
+ * RX-free queue	26		27		28
+ * TX-done queue is always 31, per-port RX and TX-ready queues are configurable
+ *
+ *
+ * Queue entries:
+ * bits 0 -> 1	- NPE ID (RX and TX-done)
+ * bits 0 -> 2	- priority (TX, per 802.1D)
+ * bits 3 -> 4	- port ID (user-set?)
+ * bits 5 -> 31	- physical descriptor address
+ */
+
+#include <linux/delay.h>
+#include <linux/dma-mapping.h>
+#include <linux/dmapool.h>
+#include <linux/etherdevice.h>
+#include <linux/io.h>
+#include <linux/kernel.h>
+#include <linux/net_tstamp.h>
+#include <linux/phy.h>
+#include <linux/platform_device.h>
+#include <linux/ptp_classify.h>
+#include <linux/slab.h>
+#include <linux/module.h>
+#include <mach/ixp46x_ts.h>
+#include <mach/npe.h>
+#include <mach/qmgr.h>
+
+#define DEBUG_DESC		0
+#define DEBUG_RX		0
+#define DEBUG_TX		0
+#define DEBUG_PKT_BYTES		0
+#define DEBUG_MDIO		0
+#define DEBUG_CLOSE		0
+
+#define DRV_NAME		"ixp4xx_eth"
+
+#define MAX_NPES		3
+
+#define RX_DESCS		64 /* also length of all RX queues */
+#define TX_DESCS		16 /* also length of all TX queues */
+#define TXDONE_QUEUE_LEN	64 /* dwords */
+
+#define POOL_ALLOC_SIZE		(sizeof(struct desc) * (RX_DESCS + TX_DESCS))
+#define REGS_SIZE		0x1000
+#define MAX_MRU			1536 /* 0x600 */
+#define RX_BUFF_SIZE		ALIGN((NET_IP_ALIGN) + MAX_MRU, 4)
+
+#define NAPI_WEIGHT		16
+#define MDIO_INTERVAL		(3 * HZ)
+#define MAX_MDIO_RETRIES	100 /* microseconds, typically 30 cycles */
+#define MAX_CLOSE_WAIT		1000 /* microseconds, typically 2-3 cycles */
+
+#define NPE_ID(port_id)		((port_id) >> 4)
+#define PHYSICAL_ID(port_id)	((NPE_ID(port_id) + 2) % 3)
+#define TX_QUEUE(port_id)	(NPE_ID(port_id) + 23)
+#define RXFREE_QUEUE(port_id)	(NPE_ID(port_id) + 26)
+#define TXDONE_QUEUE		31
+
+#define PTP_SLAVE_MODE		1
+#define PTP_MASTER_MODE		2
+#define PORT2CHANNEL(p)		NPE_ID(p->id)
+
+/* TX Control Registers */
+#define TX_CNTRL0_TX_EN		0x01
+#define TX_CNTRL0_HALFDUPLEX	0x02
+#define TX_CNTRL0_RETRY		0x04
+#define TX_CNTRL0_PAD_EN	0x08
+#define TX_CNTRL0_APPEND_FCS	0x10
+#define TX_CNTRL0_2DEFER	0x20
+#define TX_CNTRL0_RMII		0x40 /* reduced MII */
+#define TX_CNTRL1_RETRIES	0x0F /* 4 bits */
+
+/* RX Control Registers */
+#define RX_CNTRL0_RX_EN		0x01
+#define RX_CNTRL0_PADSTRIP_EN	0x02
+#define RX_CNTRL0_SEND_FCS	0x04
+#define RX_CNTRL0_PAUSE_EN	0x08
+#define RX_CNTRL0_LOOP_EN	0x10
+#define RX_CNTRL0_ADDR_FLTR_EN	0x20
+#define RX_CNTRL0_RX_RUNT_EN	0x40
+#define RX_CNTRL0_BCAST_DIS	0x80
+#define RX_CNTRL1_DEFER_EN	0x01
+
+/* Core Control Register */
+#define CORE_RESET		0x01
+#define CORE_RX_FIFO_FLUSH	0x02
+#define CORE_TX_FIFO_FLUSH	0x04
+#define CORE_SEND_JAM		0x08
+#define CORE_MDC_EN		0x10 /* MDIO using NPE-B ETH-0 only */
+
+#define DEFAULT_TX_CNTRL0	(TX_CNTRL0_TX_EN | TX_CNTRL0_RETRY |	\
+				 TX_CNTRL0_PAD_EN | TX_CNTRL0_APPEND_FCS | \
+				 TX_CNTRL0_2DEFER)
+#define DEFAULT_RX_CNTRL0	RX_CNTRL0_RX_EN
+#define DEFAULT_CORE_CNTRL	CORE_MDC_EN
+
+
+/* NPE message codes */
+#define NPE_GETSTATUS			0x00
+#define NPE_EDB_SETPORTADDRESS		0x01
+#define NPE_EDB_GETMACADDRESSDATABASE	0x02
+#define NPE_EDB_SETMACADDRESSSDATABASE	0x03
+#define NPE_GETSTATS			0x04
+#define NPE_RESETSTATS			0x05
+#define NPE_SETMAXFRAMELENGTHS		0x06
+#define NPE_VLAN_SETRXTAGMODE		0x07
+#define NPE_VLAN_SETDEFAULTRXVID	0x08
+#define NPE_VLAN_SETPORTVLANTABLEENTRY	0x09
+#define NPE_VLAN_SETPORTVLANTABLERANGE	0x0A
+#define NPE_VLAN_SETRXQOSENTRY		0x0B
+#define NPE_VLAN_SETPORTIDEXTRACTIONMODE 0x0C
+#define NPE_STP_SETBLOCKINGSTATE	0x0D
+#define NPE_FW_SETFIREWALLMODE		0x0E
+#define NPE_PC_SETFRAMECONTROLDURATIONID 0x0F
+#define NPE_PC_SETAPMACTABLE		0x11
+#define NPE_SETLOOPBACK_MODE		0x12
+#define NPE_PC_SETBSSIDTABLE		0x13
+#define NPE_ADDRESS_FILTER_CONFIG	0x14
+#define NPE_APPENDFCSCONFIG		0x15
+#define NPE_NOTIFY_MAC_RECOVERY_DONE	0x16
+#define NPE_MAC_RECOVERY_START		0x17
+
+
+#ifdef __ARMEB__
+typedef struct sk_buff buffer_t;
+#define free_buffer dev_kfree_skb
+#define free_buffer_irq dev_kfree_skb_irq
+#else
+typedef void buffer_t;
+#define free_buffer kfree
+#define free_buffer_irq kfree
+#endif
+
+struct eth_regs {
+	u32 tx_control[2], __res1[2];		/* 000 */
+	u32 rx_control[2], __res2[2];		/* 010 */
+	u32 random_seed, __res3[3];		/* 020 */
+	u32 partial_empty_threshold, __res4;	/* 030 */
+	u32 partial_full_threshold, __res5;	/* 038 */
+	u32 tx_start_bytes, __res6[3];		/* 040 */
+	u32 tx_deferral, rx_deferral, __res7[2];/* 050 */
+	u32 tx_2part_deferral[2], __res8[2];	/* 060 */
+	u32 slot_time, __res9[3];		/* 070 */
+	u32 mdio_command[4];			/* 080 */
+	u32 mdio_status[4];			/* 090 */
+	u32 mcast_mask[6], __res10[2];		/* 0A0 */
+	u32 mcast_addr[6], __res11[2];		/* 0C0 */
+	u32 int_clock_threshold, __res12[3];	/* 0E0 */
+	u32 hw_addr[6], __res13[61];		/* 0F0 */
+	u32 core_control;			/* 1FC */
+};
+
+struct port {
+	struct resource *mem_res;
+	struct eth_regs __iomem *regs;
+	struct npe *npe;
+	struct net_device *netdev;
+	struct napi_struct napi;
+	struct phy_device *phydev;
+	struct eth_plat_info *plat;
+	buffer_t *rx_buff_tab[RX_DESCS], *tx_buff_tab[TX_DESCS];
+	struct desc *desc_tab;	/* coherent */
+	u32 desc_tab_phys;
+	int id;			/* logical port ID */
+	int speed, duplex;
+	u8 firmware[4];
+	int hwts_tx_en;
+	int hwts_rx_en;
+};
+
+/* NPE message structure */
+struct msg {
+#ifdef __ARMEB__
+	u8 cmd, eth_id, byte2, byte3;
+	u8 byte4, byte5, byte6, byte7;
+#else
+	u8 byte3, byte2, eth_id, cmd;
+	u8 byte7, byte6, byte5, byte4;
+#endif
+};
+
+/* Ethernet packet descriptor */
+struct desc {
+	u32 next;		/* pointer to next buffer, unused */
+
+#ifdef __ARMEB__
+	u16 buf_len;		/* buffer length */
+	u16 pkt_len;		/* packet length */
+	u32 data;		/* pointer to data buffer in RAM */
+	u8 dest_id;
+	u8 src_id;
+	u16 flags;
+	u8 qos;
+	u8 padlen;
+	u16 vlan_tci;
+#else
+	u16 pkt_len;		/* packet length */
+	u16 buf_len;		/* buffer length */
+	u32 data;		/* pointer to data buffer in RAM */
+	u16 flags;
+	u8 src_id;
+	u8 dest_id;
+	u16 vlan_tci;
+	u8 padlen;
+	u8 qos;
+#endif
+
+#ifdef __ARMEB__
+	u8 dst_mac_0, dst_mac_1, dst_mac_2, dst_mac_3;
+	u8 dst_mac_4, dst_mac_5, src_mac_0, src_mac_1;
+	u8 src_mac_2, src_mac_3, src_mac_4, src_mac_5;
+#else
+	u8 dst_mac_3, dst_mac_2, dst_mac_1, dst_mac_0;
+	u8 src_mac_1, src_mac_0, dst_mac_5, dst_mac_4;
+	u8 src_mac_5, src_mac_4, src_mac_3, src_mac_2;
+#endif
+};
+
+
+#define rx_desc_phys(port, n)	((port)->desc_tab_phys +		\
+				 (n) * sizeof(struct desc))
+#define rx_desc_ptr(port, n)	(&(port)->desc_tab[n])
+
+#define tx_desc_phys(port, n)	((port)->desc_tab_phys +		\
+				 ((n) + RX_DESCS) * sizeof(struct desc))
+#define tx_desc_ptr(port, n)	(&(port)->desc_tab[(n) + RX_DESCS])
+
+#ifndef __ARMEB__
+static inline void memcpy_swab32(u32 *dest, u32 *src, int cnt)
+{
+	int i;
+	for (i = 0; i < cnt; i++)
+		dest[i] = swab32(src[i]);
+}
+#endif
+
+static spinlock_t mdio_lock;
+static struct eth_regs __iomem *mdio_regs; /* mdio command and status only */
+static struct mii_bus *mdio_bus;
+static int ports_open;
+static struct port *npe_port_tab[MAX_NPES];
+static struct dma_pool *dma_pool;
+
+static int ixp_ptp_match(struct sk_buff *skb, u16 uid_hi, u32 uid_lo, u16 seqid)
+{
+	u8 *data = skb->data;
+	unsigned int offset;
+	u16 *hi, *id;
+	u32 lo;
+
+	if (ptp_classify_raw(skb) != PTP_CLASS_V1_IPV4)
+		return 0;
+
+	offset = ETH_HLEN + IPV4_HLEN(data) + UDP_HLEN;
+
+	if (skb->len < offset + OFF_PTP_SEQUENCE_ID + sizeof(seqid))
+		return 0;
+
+	hi = (u16 *)(data + offset + OFF_PTP_SOURCE_UUID);
+	id = (u16 *)(data + offset + OFF_PTP_SEQUENCE_ID);
+
+	memcpy(&lo, &hi[1], sizeof(lo));
+
+	return (uid_hi == ntohs(*hi) &&
+		uid_lo == ntohl(lo) &&
+		seqid  == ntohs(*id));
+}
+
+static void ixp_rx_timestamp(struct port *port, struct sk_buff *skb)
+{
+	struct skb_shared_hwtstamps *shhwtstamps;
+	struct ixp46x_ts_regs *regs;
+	u64 ns;
+	u32 ch, hi, lo, val;
+	u16 uid, seq;
+
+	if (!port->hwts_rx_en)
+		return;
+
+	ch = PORT2CHANNEL(port);
+
+	regs = (struct ixp46x_ts_regs __iomem *) IXP4XX_TIMESYNC_BASE_VIRT;
+
+	val = __raw_readl(&regs->channel[ch].ch_event);
+
+	if (!(val & RX_SNAPSHOT_LOCKED))
+		return;
+
+	lo = __raw_readl(&regs->channel[ch].src_uuid_lo);
+	hi = __raw_readl(&regs->channel[ch].src_uuid_hi);
+
+	uid = hi & 0xffff;
+	seq = (hi >> 16) & 0xffff;
+
+	if (!ixp_ptp_match(skb, htons(uid), htonl(lo), htons(seq)))
+		goto out;
+
+	lo = __raw_readl(&regs->channel[ch].rx_snap_lo);
+	hi = __raw_readl(&regs->channel[ch].rx_snap_hi);
+	ns = ((u64) hi) << 32;
+	ns |= lo;
+	ns <<= TICKS_NS_SHIFT;
+
+	shhwtstamps = skb_hwtstamps(skb);
+	memset(shhwtstamps, 0, sizeof(*shhwtstamps));
+	shhwtstamps->hwtstamp = ns_to_ktime(ns);
+out:
+	__raw_writel(RX_SNAPSHOT_LOCKED, &regs->channel[ch].ch_event);
+}
+
+static void ixp_tx_timestamp(struct port *port, struct sk_buff *skb)
+{
+	struct skb_shared_hwtstamps shhwtstamps;
+	struct ixp46x_ts_regs *regs;
+	struct skb_shared_info *shtx;
+	u64 ns;
+	u32 ch, cnt, hi, lo, val;
+
+	shtx = skb_shinfo(skb);
+	if (unlikely(shtx->tx_flags & SKBTX_HW_TSTAMP && port->hwts_tx_en))
+		shtx->tx_flags |= SKBTX_IN_PROGRESS;
+	else
+		return;
+
+	ch = PORT2CHANNEL(port);
+
+	regs = (struct ixp46x_ts_regs __iomem *) IXP4XX_TIMESYNC_BASE_VIRT;
+
+	/*
+	 * This really stinks, but we have to poll for the Tx time stamp.
+	 * Usually, the time stamp is ready after 4 to 6 microseconds.
+	 */
+	for (cnt = 0; cnt < 100; cnt++) {
+		val = __raw_readl(&regs->channel[ch].ch_event);
+		if (val & TX_SNAPSHOT_LOCKED)
+			break;
+		udelay(1);
+	}
+	if (!(val & TX_SNAPSHOT_LOCKED)) {
+		shtx->tx_flags &= ~SKBTX_IN_PROGRESS;
+		return;
+	}
+
+	lo = __raw_readl(&regs->channel[ch].tx_snap_lo);
+	hi = __raw_readl(&regs->channel[ch].tx_snap_hi);
+	ns = ((u64) hi) << 32;
+	ns |= lo;
+	ns <<= TICKS_NS_SHIFT;
+
+	memset(&shhwtstamps, 0, sizeof(shhwtstamps));
+	shhwtstamps.hwtstamp = ns_to_ktime(ns);
+	skb_tstamp_tx(skb, &shhwtstamps);
+
+	__raw_writel(TX_SNAPSHOT_LOCKED, &regs->channel[ch].ch_event);
+}
+
+static int hwtstamp_set(struct net_device *netdev, struct ifreq *ifr)
+{
+	struct hwtstamp_config cfg;
+	struct ixp46x_ts_regs *regs;
+	struct port *port = netdev_priv(netdev);
+	int ch;
+
+	if (copy_from_user(&cfg, ifr->ifr_data, sizeof(cfg)))
+		return -EFAULT;
+
+	if (cfg.flags) /* reserved for future extensions */
+		return -EINVAL;
+
+	ch = PORT2CHANNEL(port);
+	regs = (struct ixp46x_ts_regs __iomem *) IXP4XX_TIMESYNC_BASE_VIRT;
+
+	if (cfg.tx_type != HWTSTAMP_TX_OFF && cfg.tx_type != HWTSTAMP_TX_ON)
+		return -ERANGE;
+
+	switch (cfg.rx_filter) {
+	case HWTSTAMP_FILTER_NONE:
+		port->hwts_rx_en = 0;
+		break;
+	case HWTSTAMP_FILTER_PTP_V1_L4_SYNC:
+		port->hwts_rx_en = PTP_SLAVE_MODE;
+		__raw_writel(0, &regs->channel[ch].ch_control);
+		break;
+	case HWTSTAMP_FILTER_PTP_V1_L4_DELAY_REQ:
+		port->hwts_rx_en = PTP_MASTER_MODE;
+		__raw_writel(MASTER_MODE, &regs->channel[ch].ch_control);
+		break;
+	default:
+		return -ERANGE;
+	}
+
+	port->hwts_tx_en = cfg.tx_type == HWTSTAMP_TX_ON;
+
+	/* Clear out any old time stamps. */
+	__raw_writel(TX_SNAPSHOT_LOCKED | RX_SNAPSHOT_LOCKED,
+		     &regs->channel[ch].ch_event);
+
+	return copy_to_user(ifr->ifr_data, &cfg, sizeof(cfg)) ? -EFAULT : 0;
+}
+
+static int hwtstamp_get(struct net_device *netdev, struct ifreq *ifr)
+{
+	struct hwtstamp_config cfg;
+	struct port *port = netdev_priv(netdev);
+
+	cfg.flags = 0;
+	cfg.tx_type = port->hwts_tx_en ? HWTSTAMP_TX_ON : HWTSTAMP_TX_OFF;
+
+	switch (port->hwts_rx_en) {
+	case 0:
+		cfg.rx_filter = HWTSTAMP_FILTER_NONE;
+		break;
+	case PTP_SLAVE_MODE:
+		cfg.rx_filter = HWTSTAMP_FILTER_PTP_V1_L4_SYNC;
+		break;
+	case PTP_MASTER_MODE:
+		cfg.rx_filter = HWTSTAMP_FILTER_PTP_V1_L4_DELAY_REQ;
+		break;
+	default:
+		WARN_ON_ONCE(1);
+		return -ERANGE;
+	}
+
+	return copy_to_user(ifr->ifr_data, &cfg, sizeof(cfg)) ? -EFAULT : 0;
+}
+
+static int ixp4xx_mdio_cmd(struct mii_bus *bus, int phy_id, int location,
+			   int write, u16 cmd)
+{
+	int cycles = 0;
+
+	if (__raw_readl(&mdio_regs->mdio_command[3]) & 0x80) {
+		printk(KERN_ERR "%s: MII not ready to transmit\n", bus->name);
+		return -1;
+	}
+
+	if (write) {
+		__raw_writel(cmd & 0xFF, &mdio_regs->mdio_command[0]);
+		__raw_writel(cmd >> 8, &mdio_regs->mdio_command[1]);
+	}
+	__raw_writel(((phy_id << 5) | location) & 0xFF,
+		     &mdio_regs->mdio_command[2]);
+	__raw_writel((phy_id >> 3) | (write << 2) | 0x80 /* GO */,
+		     &mdio_regs->mdio_command[3]);
+
+	while ((cycles < MAX_MDIO_RETRIES) &&
+	       (__raw_readl(&mdio_regs->mdio_command[3]) & 0x80)) {
+		udelay(1);
+		cycles++;
+	}
+
+	if (cycles == MAX_MDIO_RETRIES) {
+		printk(KERN_ERR "%s #%i: MII write failed\n", bus->name,
+		       phy_id);
+		return -1;
+	}
+
+#if DEBUG_MDIO
+	printk(KERN_DEBUG "%s #%i: mdio_%s() took %i cycles\n", bus->name,
+	       phy_id, write ? "write" : "read", cycles);
+#endif
+
+	if (write)
+		return 0;
+
+	if (__raw_readl(&mdio_regs->mdio_status[3]) & 0x80) {
+#if DEBUG_MDIO
+		printk(KERN_DEBUG "%s #%i: MII read failed\n", bus->name,
+		       phy_id);
+#endif
+		return 0xFFFF; /* don't return error */
+	}
+
+	return (__raw_readl(&mdio_regs->mdio_status[0]) & 0xFF) |
+		((__raw_readl(&mdio_regs->mdio_status[1]) & 0xFF) << 8);
+}
+
+static int ixp4xx_mdio_read(struct mii_bus *bus, int phy_id, int location)
+{
+	unsigned long flags;
+	int ret;
+
+	spin_lock_irqsave(&mdio_lock, flags);
+	ret = ixp4xx_mdio_cmd(bus, phy_id, location, 0, 0);
+	spin_unlock_irqrestore(&mdio_lock, flags);
+#if DEBUG_MDIO
+	printk(KERN_DEBUG "%s #%i: MII read [%i] -> 0x%X\n", bus->name,
+	       phy_id, location, ret);
+#endif
+	return ret;
+}
+
+static int ixp4xx_mdio_write(struct mii_bus *bus, int phy_id, int location,
+			     u16 val)
+{
+	unsigned long flags;
+	int ret;
+
+	spin_lock_irqsave(&mdio_lock, flags);
+	ret = ixp4xx_mdio_cmd(bus, phy_id, location, 1, val);
+	spin_unlock_irqrestore(&mdio_lock, flags);
+#if DEBUG_MDIO
+	printk(KERN_DEBUG "%s #%i: MII write [%i] <- 0x%X, err = %i\n",
+	       bus->name, phy_id, location, val, ret);
+#endif
+	return ret;
+}
+
+static int ixp4xx_mdio_register(void)
+{
+	int err;
+
+	if (!(mdio_bus = mdiobus_alloc()))
+		return -ENOMEM;
+
+	if (cpu_is_ixp43x()) {
+		/* IXP43x lacks NPE-B and uses NPE-C for MII PHY access */
+		if (!(ixp4xx_read_feature_bits() & IXP4XX_FEATURE_NPEC_ETH))
+			return -ENODEV;
+		mdio_regs = (struct eth_regs __iomem *)IXP4XX_EthC_BASE_VIRT;
+	} else {
+		/* All MII PHY accesses use NPE-B Ethernet registers */
+		if (!(ixp4xx_read_feature_bits() & IXP4XX_FEATURE_NPEB_ETH0))
+			return -ENODEV;
+		mdio_regs = (struct eth_regs __iomem *)IXP4XX_EthB_BASE_VIRT;
+	}
+
+	__raw_writel(DEFAULT_CORE_CNTRL, &mdio_regs->core_control);
+	spin_lock_init(&mdio_lock);
+	mdio_bus->name = "IXP4xx MII Bus";
+	mdio_bus->read = &ixp4xx_mdio_read;
+	mdio_bus->write = &ixp4xx_mdio_write;
+	snprintf(mdio_bus->id, MII_BUS_ID_SIZE, "ixp4xx-eth-0");
+
+	if ((err = mdiobus_register(mdio_bus)))
+		mdiobus_free(mdio_bus);
+	return err;
+}
+
+static void ixp4xx_mdio_remove(void)
+{
+	mdiobus_unregister(mdio_bus);
+	mdiobus_free(mdio_bus);
+}
+
+
+static void ixp4xx_adjust_link(struct net_device *dev)
+{
+	struct port *port = netdev_priv(dev);
+	struct phy_device *phydev = port->phydev;
+
+	if (!phydev->link) {
+		if (port->speed) {
+			port->speed = 0;
+			printk(KERN_INFO "%s: link down\n", dev->name);
+		}
+		return;
+	}
+
+	if (port->speed == phydev->speed && port->duplex == phydev->duplex)
+		return;
+
+	port->speed = phydev->speed;
+	port->duplex = phydev->duplex;
+
+	if (port->duplex)
+		__raw_writel(DEFAULT_TX_CNTRL0 & ~TX_CNTRL0_HALFDUPLEX,
+			     &port->regs->tx_control[0]);
+	else
+		__raw_writel(DEFAULT_TX_CNTRL0 | TX_CNTRL0_HALFDUPLEX,
+			     &port->regs->tx_control[0]);
+
+	printk(KERN_INFO "%s: link up, speed %u Mb/s, %s duplex\n",
+	       dev->name, port->speed, port->duplex ? "full" : "half");
+}
+
+
+static inline void debug_pkt(struct net_device *dev, const char *func,
+			     u8 *data, int len)
+{
+#if DEBUG_PKT_BYTES
+	int i;
+
+	printk(KERN_DEBUG "%s: %s(%i) ", dev->name, func, len);
+	for (i = 0; i < len; i++) {
+		if (i >= DEBUG_PKT_BYTES)
+			break;
+		printk("%s%02X",
+		       ((i == 6) || (i == 12) || (i >= 14)) ? " " : "",
+		       data[i]);
+	}
+	printk("\n");
+#endif
+}
+
+
+static inline void debug_desc(u32 phys, struct desc *desc)
+{
+#if DEBUG_DESC
+	printk(KERN_DEBUG "%X: %X %3X %3X %08X %2X < %2X %4X %X"
+	       " %X %X %02X%02X%02X%02X%02X%02X < %02X%02X%02X%02X%02X%02X\n",
+	       phys, desc->next, desc->buf_len, desc->pkt_len,
+	       desc->data, desc->dest_id, desc->src_id, desc->flags,
+	       desc->qos, desc->padlen, desc->vlan_tci,
+	       desc->dst_mac_0, desc->dst_mac_1, desc->dst_mac_2,
+	       desc->dst_mac_3, desc->dst_mac_4, desc->dst_mac_5,
+	       desc->src_mac_0, desc->src_mac_1, desc->src_mac_2,
+	       desc->src_mac_3, desc->src_mac_4, desc->src_mac_5);
+#endif
+}
+
+static inline int queue_get_desc(unsigned int queue, struct port *port,
+				 int is_tx)
+{
+	u32 phys, tab_phys, n_desc;
+	struct desc *tab;
+
+	if (!(phys = qmgr_get_entry(queue)))
+		return -1;
+
+	phys &= ~0x1F; /* mask out non-address bits */
+	tab_phys = is_tx ? tx_desc_phys(port, 0) : rx_desc_phys(port, 0);
+	tab = is_tx ? tx_desc_ptr(port, 0) : rx_desc_ptr(port, 0);
+	n_desc = (phys - tab_phys) / sizeof(struct desc);
+	BUG_ON(n_desc >= (is_tx ? TX_DESCS : RX_DESCS));
+	debug_desc(phys, &tab[n_desc]);
+	BUG_ON(tab[n_desc].next);
+	return n_desc;
+}
+
+static inline void queue_put_desc(unsigned int queue, u32 phys,
+				  struct desc *desc)
+{
+	debug_desc(phys, desc);
+	BUG_ON(phys & 0x1F);
+	qmgr_put_entry(queue, phys);
+	/* Don't check for queue overflow here, we've allocated sufficient
+	   length and queues >= 32 don't support this check anyway. */
+}
+
+
+static inline void dma_unmap_tx(struct port *port, struct desc *desc)
+{
+#ifdef __ARMEB__
+	dma_unmap_single(&port->netdev->dev, desc->data,
+			 desc->buf_len, DMA_TO_DEVICE);
+#else
+	dma_unmap_single(&port->netdev->dev, desc->data & ~3,
+			 ALIGN((desc->data & 3) + desc->buf_len, 4),
+			 DMA_TO_DEVICE);
+#endif
+}
+
+
+static void eth_rx_irq(void *pdev)
+{
+	struct net_device *dev = pdev;
+	struct port *port = netdev_priv(dev);
+
+#if DEBUG_RX
+	printk(KERN_DEBUG "%s: eth_rx_irq\n", dev->name);
+#endif
+	qmgr_disable_irq(port->plat->rxq);
+	napi_schedule(&port->napi);
+}
+
+static int eth_poll(struct napi_struct *napi, int budget)
+{
+	struct port *port = container_of(napi, struct port, napi);
+	struct net_device *dev = port->netdev;
+	unsigned int rxq = port->plat->rxq, rxfreeq = RXFREE_QUEUE(port->id);
+	int received = 0;
+
+#if DEBUG_RX
+	printk(KERN_DEBUG "%s: eth_poll\n", dev->name);
+#endif
+
+	while (received < budget) {
+		struct sk_buff *skb;
+		struct desc *desc;
+		int n;
+#ifdef __ARMEB__
+		struct sk_buff *temp;
+		u32 phys;
+#endif
+
+		if ((n = queue_get_desc(rxq, port, 0)) < 0) {
+#if DEBUG_RX
+			printk(KERN_DEBUG "%s: eth_poll napi_complete\n",
+			       dev->name);
+#endif
+			napi_complete(napi);
+			qmgr_enable_irq(rxq);
+			if (!qmgr_stat_below_low_watermark(rxq) &&
+			    napi_reschedule(napi)) { /* not empty again */
+#if DEBUG_RX
+				printk(KERN_DEBUG "%s: eth_poll"
+				       " napi_reschedule successed\n",
+				       dev->name);
+#endif
+				qmgr_disable_irq(rxq);
+				continue;
+			}
+#if DEBUG_RX
+			printk(KERN_DEBUG "%s: eth_poll all done\n",
+			       dev->name);
+#endif
+			return received; /* all work done */
+		}
+
+		desc = rx_desc_ptr(port, n);
+
+#ifdef __ARMEB__
+		if ((skb = netdev_alloc_skb(dev, RX_BUFF_SIZE))) {
+			phys = dma_map_single(&dev->dev, skb->data,
+					      RX_BUFF_SIZE, DMA_FROM_DEVICE);
+			if (dma_mapping_error(&dev->dev, phys)) {
+				dev_kfree_skb(skb);
+				skb = NULL;
+			}
+		}
+#else
+		skb = netdev_alloc_skb(dev,
+				       ALIGN(NET_IP_ALIGN + desc->pkt_len, 4));
+#endif
+
+		if (!skb) {
+			dev->stats.rx_dropped++;
+			/* put the desc back on RX-ready queue */
+			desc->buf_len = MAX_MRU;
+			desc->pkt_len = 0;
+			queue_put_desc(rxfreeq, rx_desc_phys(port, n), desc);
+			continue;
+		}
+
+		/* process received frame */
+#ifdef __ARMEB__
+		temp = skb;
+		skb = port->rx_buff_tab[n];
+		dma_unmap_single(&dev->dev, desc->data - NET_IP_ALIGN,
+				 RX_BUFF_SIZE, DMA_FROM_DEVICE);
+#else
+		dma_sync_single_for_cpu(&dev->dev, desc->data - NET_IP_ALIGN,
+					RX_BUFF_SIZE, DMA_FROM_DEVICE);
+		memcpy_swab32((u32 *)skb->data, (u32 *)port->rx_buff_tab[n],
+			      ALIGN(NET_IP_ALIGN + desc->pkt_len, 4) / 4);
+#endif
+		skb_reserve(skb, NET_IP_ALIGN);
+		skb_put(skb, desc->pkt_len);
+
+		debug_pkt(dev, "eth_poll", skb->data, skb->len);
+
+		ixp_rx_timestamp(port, skb);
+		skb->protocol = eth_type_trans(skb, dev);
+		dev->stats.rx_packets++;
+		dev->stats.rx_bytes += skb->len;
+		netif_receive_skb(skb);
+
+		/* put the new buffer on RX-free queue */
+#ifdef __ARMEB__
+		port->rx_buff_tab[n] = temp;
+		desc->data = phys + NET_IP_ALIGN;
+#endif
+		desc->buf_len = MAX_MRU;
+		desc->pkt_len = 0;
+		queue_put_desc(rxfreeq, rx_desc_phys(port, n), desc);
+		received++;
+	}
+
+#if DEBUG_RX
+	printk(KERN_DEBUG "eth_poll(): end, not all work done\n");
+#endif
+	return received;		/* not all work done */
+}
+
+
+static void eth_txdone_irq(void *unused)
+{
+	u32 phys;
+
+#if DEBUG_TX
+	printk(KERN_DEBUG DRV_NAME ": eth_txdone_irq\n");
+#endif
+	while ((phys = qmgr_get_entry(TXDONE_QUEUE)) != 0) {
+		u32 npe_id, n_desc;
+		struct port *port;
+		struct desc *desc;
+		int start;
+
+		npe_id = phys & 3;
+		BUG_ON(npe_id >= MAX_NPES);
+		port = npe_port_tab[npe_id];
+		BUG_ON(!port);
+		phys &= ~0x1F; /* mask out non-address bits */
+		n_desc = (phys - tx_desc_phys(port, 0)) / sizeof(struct desc);
+		BUG_ON(n_desc >= TX_DESCS);
+		desc = tx_desc_ptr(port, n_desc);
+		debug_desc(phys, desc);
+
+		if (port->tx_buff_tab[n_desc]) { /* not the draining packet */
+			port->netdev->stats.tx_packets++;
+			port->netdev->stats.tx_bytes += desc->pkt_len;
+
+			dma_unmap_tx(port, desc);
+#if DEBUG_TX
+			printk(KERN_DEBUG "%s: eth_txdone_irq free %p\n",
+			       port->netdev->name, port->tx_buff_tab[n_desc]);
+#endif
+			free_buffer_irq(port->tx_buff_tab[n_desc]);
+			port->tx_buff_tab[n_desc] = NULL;
+		}
+
+		start = qmgr_stat_below_low_watermark(port->plat->txreadyq);
+		queue_put_desc(port->plat->txreadyq, phys, desc);
+		if (start) { /* TX-ready queue was empty */
+#if DEBUG_TX
+			printk(KERN_DEBUG "%s: eth_txdone_irq xmit ready\n",
+			       port->netdev->name);
+#endif
+			netif_wake_queue(port->netdev);
+		}
+	}
+}
+
+static int eth_xmit(struct sk_buff *skb, struct net_device *dev)
+{
+	struct port *port = netdev_priv(dev);
+	unsigned int txreadyq = port->plat->txreadyq;
+	int len, offset, bytes, n;
+	void *mem;
+	u32 phys;
+	struct desc *desc;
+
+#if DEBUG_TX
+	printk(KERN_DEBUG "%s: eth_xmit\n", dev->name);
+#endif
+
+	if (unlikely(skb->len > MAX_MRU)) {
+		dev_kfree_skb(skb);
+		dev->stats.tx_errors++;
+		return NETDEV_TX_OK;
+	}
+
+	debug_pkt(dev, "eth_xmit", skb->data, skb->len);
+
+	len = skb->len;
+#ifdef __ARMEB__
+	offset = 0; /* no need to keep alignment */
+	bytes = len;
+	mem = skb->data;
+#else
+	offset = (int)skb->data & 3; /* keep 32-bit alignment */
+	bytes = ALIGN(offset + len, 4);
+	if (!(mem = kmalloc(bytes, GFP_ATOMIC))) {
+		dev_kfree_skb(skb);
+		dev->stats.tx_dropped++;
+		return NETDEV_TX_OK;
+	}
+	memcpy_swab32(mem, (u32 *)((int)skb->data & ~3), bytes / 4);
+#endif
+
+	phys = dma_map_single(&dev->dev, mem, bytes, DMA_TO_DEVICE);
+	if (dma_mapping_error(&dev->dev, phys)) {
+		dev_kfree_skb(skb);
+#ifndef __ARMEB__
+		kfree(mem);
+#endif
+		dev->stats.tx_dropped++;
+		return NETDEV_TX_OK;
+	}
+
+	n = queue_get_desc(txreadyq, port, 1);
+	BUG_ON(n < 0);
+	desc = tx_desc_ptr(port, n);
+
+#ifdef __ARMEB__
+	port->tx_buff_tab[n] = skb;
+#else
+	port->tx_buff_tab[n] = mem;
+#endif
+	desc->data = phys + offset;
+	desc->buf_len = desc->pkt_len = len;
+
+	/* NPE firmware pads short frames with zeros internally */
+	wmb();
+	queue_put_desc(TX_QUEUE(port->id), tx_desc_phys(port, n), desc);
+
+	if (qmgr_stat_below_low_watermark(txreadyq)) { /* empty */
+#if DEBUG_TX
+		printk(KERN_DEBUG "%s: eth_xmit queue full\n", dev->name);
+#endif
+		netif_stop_queue(dev);
+		/* we could miss TX ready interrupt */
+		/* really empty in fact */
+		if (!qmgr_stat_below_low_watermark(txreadyq)) {
+#if DEBUG_TX
+			printk(KERN_DEBUG "%s: eth_xmit ready again\n",
+			       dev->name);
+#endif
+			netif_wake_queue(dev);
+		}
+	}
+
+#if DEBUG_TX
+	printk(KERN_DEBUG "%s: eth_xmit end\n", dev->name);
+#endif
+
+	ixp_tx_timestamp(port, skb);
+	skb_tx_timestamp(skb);
+
+#ifndef __ARMEB__
+	dev_kfree_skb(skb);
+#endif
+	return NETDEV_TX_OK;
+}
+
+
+static void eth_set_mcast_list(struct net_device *dev)
+{
+	struct port *port = netdev_priv(dev);
+	struct netdev_hw_addr *ha;
+	u8 diffs[ETH_ALEN], *addr;
+	int i;
+	static const u8 allmulti[] = { 0x01, 0x00, 0x00, 0x00, 0x00, 0x00 };
+
+	if ((dev->flags & IFF_ALLMULTI) && !(dev->flags & IFF_PROMISC)) {
+		for (i = 0; i < ETH_ALEN; i++) {
+			__raw_writel(allmulti[i], &port->regs->mcast_addr[i]);
+			__raw_writel(allmulti[i], &port->regs->mcast_mask[i]);
+		}
+		__raw_writel(DEFAULT_RX_CNTRL0 | RX_CNTRL0_ADDR_FLTR_EN,
+			&port->regs->rx_control[0]);
+		return;
+	}
+
+	if ((dev->flags & IFF_PROMISC) || netdev_mc_empty(dev)) {
+		__raw_writel(DEFAULT_RX_CNTRL0 & ~RX_CNTRL0_ADDR_FLTR_EN,
+			     &port->regs->rx_control[0]);
+		return;
+	}
+
+	eth_zero_addr(diffs);
+
+	addr = NULL;
+	netdev_for_each_mc_addr(ha, dev) {
+		if (!addr)
+			addr = ha->addr; /* first MAC address */
+		for (i = 0; i < ETH_ALEN; i++)
+			diffs[i] |= addr[i] ^ ha->addr[i];
+	}
+
+	for (i = 0; i < ETH_ALEN; i++) {
+		__raw_writel(addr[i], &port->regs->mcast_addr[i]);
+		__raw_writel(~diffs[i], &port->regs->mcast_mask[i]);
+	}
+
+	__raw_writel(DEFAULT_RX_CNTRL0 | RX_CNTRL0_ADDR_FLTR_EN,
+		     &port->regs->rx_control[0]);
+}
+
+
+static int eth_ioctl(struct net_device *dev, struct ifreq *req, int cmd)
+{
+	struct port *port = netdev_priv(dev);
+
+	if (!netif_running(dev))
+		return -EINVAL;
+
+	if (cpu_is_ixp46x()) {
+		if (cmd == SIOCSHWTSTAMP)
+			return hwtstamp_set(dev, req);
+		if (cmd == SIOCGHWTSTAMP)
+			return hwtstamp_get(dev, req);
+	}
+
+	return phy_mii_ioctl(port->phydev, req, cmd);
+}
+
+/* ethtool support */
+
+static void ixp4xx_get_drvinfo(struct net_device *dev,
+			       struct ethtool_drvinfo *info)
+{
+	struct port *port = netdev_priv(dev);
+
+	strlcpy(info->driver, DRV_NAME, sizeof(info->driver));
+	snprintf(info->fw_version, sizeof(info->fw_version), "%u:%u:%u:%u",
+		 port->firmware[0], port->firmware[1],
+		 port->firmware[2], port->firmware[3]);
+	strlcpy(info->bus_info, "internal", sizeof(info->bus_info));
+}
+
+static int ixp4xx_get_settings(struct net_device *dev, struct ethtool_cmd *cmd)
+{
+	struct port *port = netdev_priv(dev);
+	return phy_ethtool_gset(port->phydev, cmd);
+}
+
+static int ixp4xx_set_settings(struct net_device *dev, struct ethtool_cmd *cmd)
+{
+	struct port *port = netdev_priv(dev);
+	return phy_ethtool_sset(port->phydev, cmd);
+}
+
+static int ixp4xx_nway_reset(struct net_device *dev)
+{
+	struct port *port = netdev_priv(dev);
+	return phy_start_aneg(port->phydev);
+}
+
+int ixp46x_phc_index = -1;
+EXPORT_SYMBOL_GPL(ixp46x_phc_index);
+
+static int ixp4xx_get_ts_info(struct net_device *dev,
+			      struct ethtool_ts_info *info)
+{
+	if (!cpu_is_ixp46x()) {
+		info->so_timestamping =
+			SOF_TIMESTAMPING_TX_SOFTWARE |
+			SOF_TIMESTAMPING_RX_SOFTWARE |
+			SOF_TIMESTAMPING_SOFTWARE;
+		info->phc_index = -1;
+		return 0;
+	}
+	info->so_timestamping =
+		SOF_TIMESTAMPING_TX_HARDWARE |
+		SOF_TIMESTAMPING_RX_HARDWARE |
+		SOF_TIMESTAMPING_RAW_HARDWARE;
+	info->phc_index = ixp46x_phc_index;
+	info->tx_types =
+		(1 << HWTSTAMP_TX_OFF) |
+		(1 << HWTSTAMP_TX_ON);
+	info->rx_filters =
+		(1 << HWTSTAMP_FILTER_NONE) |
+		(1 << HWTSTAMP_FILTER_PTP_V1_L4_SYNC) |
+		(1 << HWTSTAMP_FILTER_PTP_V1_L4_DELAY_REQ);
+	return 0;
+}
+
+static const struct ethtool_ops ixp4xx_ethtool_ops = {
+	.get_drvinfo = ixp4xx_get_drvinfo,
+	.get_settings = ixp4xx_get_settings,
+	.set_settings = ixp4xx_set_settings,
+	.nway_reset = ixp4xx_nway_reset,
+	.get_link = ethtool_op_get_link,
+	.get_ts_info = ixp4xx_get_ts_info,
+};
+
+
+static int request_queues(struct port *port)
+{
+	int err;
+
+	err = qmgr_request_queue(RXFREE_QUEUE(port->id), RX_DESCS, 0, 0,
+				 "%s:RX-free", port->netdev->name);
+	if (err)
+		return err;
+
+	err = qmgr_request_queue(port->plat->rxq, RX_DESCS, 0, 0,
+				 "%s:RX", port->netdev->name);
+	if (err)
+		goto rel_rxfree;
+
+	err = qmgr_request_queue(TX_QUEUE(port->id), TX_DESCS, 0, 0,
+				 "%s:TX", port->netdev->name);
+	if (err)
+		goto rel_rx;
+
+	err = qmgr_request_queue(port->plat->txreadyq, TX_DESCS, 0, 0,
+				 "%s:TX-ready", port->netdev->name);
+	if (err)
+		goto rel_tx;
+
+	/* TX-done queue handles skbs sent out by the NPEs */
+	if (!ports_open) {
+		err = qmgr_request_queue(TXDONE_QUEUE, TXDONE_QUEUE_LEN, 0, 0,
+					 "%s:TX-done", DRV_NAME);
+		if (err)
+			goto rel_txready;
+	}
+	return 0;
+
+rel_txready:
+	qmgr_release_queue(port->plat->txreadyq);
+rel_tx:
+	qmgr_release_queue(TX_QUEUE(port->id));
+rel_rx:
+	qmgr_release_queue(port->plat->rxq);
+rel_rxfree:
+	qmgr_release_queue(RXFREE_QUEUE(port->id));
+	printk(KERN_DEBUG "%s: unable to request hardware queues\n",
+	       port->netdev->name);
+	return err;
+}
+
+static void release_queues(struct port *port)
+{
+	qmgr_release_queue(RXFREE_QUEUE(port->id));
+	qmgr_release_queue(port->plat->rxq);
+	qmgr_release_queue(TX_QUEUE(port->id));
+	qmgr_release_queue(port->plat->txreadyq);
+
+	if (!ports_open)
+		qmgr_release_queue(TXDONE_QUEUE);
+}
+
+static int init_queues(struct port *port)
+{
+	int i;
+
+	if (!ports_open) {
+		dma_pool = dma_pool_create(DRV_NAME, &port->netdev->dev,
+					   POOL_ALLOC_SIZE, 32, 0);
+		if (!dma_pool)
+			return -ENOMEM;
+	}
+
+	if (!(port->desc_tab = dma_pool_alloc(dma_pool, GFP_KERNEL,
+					      &port->desc_tab_phys)))
+		return -ENOMEM;
+	memset(port->desc_tab, 0, POOL_ALLOC_SIZE);
+	memset(port->rx_buff_tab, 0, sizeof(port->rx_buff_tab)); /* tables */
+	memset(port->tx_buff_tab, 0, sizeof(port->tx_buff_tab));
+
+	/* Setup RX buffers */
+	for (i = 0; i < RX_DESCS; i++) {
+		struct desc *desc = rx_desc_ptr(port, i);
+		buffer_t *buff; /* skb or kmalloc()ated memory */
+		void *data;
+#ifdef __ARMEB__
+		if (!(buff = netdev_alloc_skb(port->netdev, RX_BUFF_SIZE)))
+			return -ENOMEM;
+		data = buff->data;
+#else
+		if (!(buff = kmalloc(RX_BUFF_SIZE, GFP_KERNEL)))
+			return -ENOMEM;
+		data = buff;
+#endif
+		desc->buf_len = MAX_MRU;
+		desc->data = dma_map_single(&port->netdev->dev, data,
+					    RX_BUFF_SIZE, DMA_FROM_DEVICE);
+		if (dma_mapping_error(&port->netdev->dev, desc->data)) {
+			free_buffer(buff);
+			return -EIO;
+		}
+		desc->data += NET_IP_ALIGN;
+		port->rx_buff_tab[i] = buff;
+	}
+
+	return 0;
+}
+
+static void destroy_queues(struct port *port)
+{
+	int i;
+
+	if (port->desc_tab) {
+		for (i = 0; i < RX_DESCS; i++) {
+			struct desc *desc = rx_desc_ptr(port, i);
+			buffer_t *buff = port->rx_buff_tab[i];
+			if (buff) {
+				dma_unmap_single(&port->netdev->dev,
+						 desc->data - NET_IP_ALIGN,
+						 RX_BUFF_SIZE, DMA_FROM_DEVICE);
+				free_buffer(buff);
+			}
+		}
+		for (i = 0; i < TX_DESCS; i++) {
+			struct desc *desc = tx_desc_ptr(port, i);
+			buffer_t *buff = port->tx_buff_tab[i];
+			if (buff) {
+				dma_unmap_tx(port, desc);
+				free_buffer(buff);
+			}
+		}
+		dma_pool_free(dma_pool, port->desc_tab, port->desc_tab_phys);
+		port->desc_tab = NULL;
+	}
+
+	if (!ports_open && dma_pool) {
+		dma_pool_destroy(dma_pool);
+		dma_pool = NULL;
+	}
+}
+
+static int eth_open(struct net_device *dev)
+{
+	struct port *port = netdev_priv(dev);
+	struct npe *npe = port->npe;
+	struct msg msg;
+	int i, err;
+
+	if (!npe_running(npe)) {
+		err = npe_load_firmware(npe, npe_name(npe), &dev->dev);
+		if (err)
+			return err;
+
+		if (npe_recv_message(npe, &msg, "ETH_GET_STATUS")) {
+			printk(KERN_ERR "%s: %s not responding\n", dev->name,
+			       npe_name(npe));
+			return -EIO;
+		}
+		port->firmware[0] = msg.byte4;
+		port->firmware[1] = msg.byte5;
+		port->firmware[2] = msg.byte6;
+		port->firmware[3] = msg.byte7;
+	}
+
+	memset(&msg, 0, sizeof(msg));
+	msg.cmd = NPE_VLAN_SETRXQOSENTRY;
+	msg.eth_id = port->id;
+	msg.byte5 = port->plat->rxq | 0x80;
+	msg.byte7 = port->plat->rxq << 4;
+	for (i = 0; i < 8; i++) {
+		msg.byte3 = i;
+		if (npe_send_recv_message(port->npe, &msg, "ETH_SET_RXQ"))
+			return -EIO;
+	}
+
+	msg.cmd = NPE_EDB_SETPORTADDRESS;
+	msg.eth_id = PHYSICAL_ID(port->id);
+	msg.byte2 = dev->dev_addr[0];
+	msg.byte3 = dev->dev_addr[1];
+	msg.byte4 = dev->dev_addr[2];
+	msg.byte5 = dev->dev_addr[3];
+	msg.byte6 = dev->dev_addr[4];
+	msg.byte7 = dev->dev_addr[5];
+	if (npe_send_recv_message(port->npe, &msg, "ETH_SET_MAC"))
+		return -EIO;
+
+	memset(&msg, 0, sizeof(msg));
+	msg.cmd = NPE_FW_SETFIREWALLMODE;
+	msg.eth_id = port->id;
+	if (npe_send_recv_message(port->npe, &msg, "ETH_SET_FIREWALL_MODE"))
+		return -EIO;
+
+	if ((err = request_queues(port)) != 0)
+		return err;
+
+	if ((err = init_queues(port)) != 0) {
+		destroy_queues(port);
+		release_queues(port);
+		return err;
+	}
+
+	port->speed = 0;	/* force "link up" message */
+	phy_start(port->phydev);
+
+	for (i = 0; i < ETH_ALEN; i++)
+		__raw_writel(dev->dev_addr[i], &port->regs->hw_addr[i]);
+	__raw_writel(0x08, &port->regs->random_seed);
+	__raw_writel(0x12, &port->regs->partial_empty_threshold);
+	__raw_writel(0x30, &port->regs->partial_full_threshold);
+	__raw_writel(0x08, &port->regs->tx_start_bytes);
+	__raw_writel(0x15, &port->regs->tx_deferral);
+	__raw_writel(0x08, &port->regs->tx_2part_deferral[0]);
+	__raw_writel(0x07, &port->regs->tx_2part_deferral[1]);
+	__raw_writel(0x80, &port->regs->slot_time);
+	__raw_writel(0x01, &port->regs->int_clock_threshold);
+
+	/* Populate queues with buffers, no failure after this point */
+	for (i = 0; i < TX_DESCS; i++)
+		queue_put_desc(port->plat->txreadyq,
+			       tx_desc_phys(port, i), tx_desc_ptr(port, i));
+
+	for (i = 0; i < RX_DESCS; i++)
+		queue_put_desc(RXFREE_QUEUE(port->id),
+			       rx_desc_phys(port, i), rx_desc_ptr(port, i));
+
+	__raw_writel(TX_CNTRL1_RETRIES, &port->regs->tx_control[1]);
+	__raw_writel(DEFAULT_TX_CNTRL0, &port->regs->tx_control[0]);
+	__raw_writel(0, &port->regs->rx_control[1]);
+	__raw_writel(DEFAULT_RX_CNTRL0, &port->regs->rx_control[0]);
+
+	napi_enable(&port->napi);
+	eth_set_mcast_list(dev);
+	netif_start_queue(dev);
+
+	qmgr_set_irq(port->plat->rxq, QUEUE_IRQ_SRC_NOT_EMPTY,
+		     eth_rx_irq, dev);
+	if (!ports_open) {
+		qmgr_set_irq(TXDONE_QUEUE, QUEUE_IRQ_SRC_NOT_EMPTY,
+			     eth_txdone_irq, NULL);
+		qmgr_enable_irq(TXDONE_QUEUE);
+	}
+	ports_open++;
+	/* we may already have RX data, enables IRQ */
+	napi_schedule(&port->napi);
+	return 0;
+}
+
+static int eth_close(struct net_device *dev)
+{
+	struct port *port = netdev_priv(dev);
+	struct msg msg;
+	int buffs = RX_DESCS; /* allocated RX buffers */
+	int i;
+
+	ports_open--;
+	qmgr_disable_irq(port->plat->rxq);
+	napi_disable(&port->napi);
+	netif_stop_queue(dev);
+
+	while (queue_get_desc(RXFREE_QUEUE(port->id), port, 0) >= 0)
+		buffs--;
+
+	memset(&msg, 0, sizeof(msg));
+	msg.cmd = NPE_SETLOOPBACK_MODE;
+	msg.eth_id = port->id;
+	msg.byte3 = 1;
+	if (npe_send_recv_message(port->npe, &msg, "ETH_ENABLE_LOOPBACK"))
+		printk(KERN_CRIT "%s: unable to enable loopback\n", dev->name);
+
+	i = 0;
+	do {			/* drain RX buffers */
+		while (queue_get_desc(port->plat->rxq, port, 0) >= 0)
+			buffs--;
+		if (!buffs)
+			break;
+		if (qmgr_stat_empty(TX_QUEUE(port->id))) {
+			/* we have to inject some packet */
+			struct desc *desc;
+			u32 phys;
+			int n = queue_get_desc(port->plat->txreadyq, port, 1);
+			BUG_ON(n < 0);
+			desc = tx_desc_ptr(port, n);
+			phys = tx_desc_phys(port, n);
+			desc->buf_len = desc->pkt_len = 1;
+			wmb();
+			queue_put_desc(TX_QUEUE(port->id), phys, desc);
+		}
+		udelay(1);
+	} while (++i < MAX_CLOSE_WAIT);
+
+	if (buffs)
+		printk(KERN_CRIT "%s: unable to drain RX queue, %i buffer(s)"
+		       " left in NPE\n", dev->name, buffs);
+#if DEBUG_CLOSE
+	if (!buffs)
+		printk(KERN_DEBUG "Draining RX queue took %i cycles\n", i);
+#endif
+
+	buffs = TX_DESCS;
+	while (queue_get_desc(TX_QUEUE(port->id), port, 1) >= 0)
+		buffs--; /* cancel TX */
+
+	i = 0;
+	do {
+		while (queue_get_desc(port->plat->txreadyq, port, 1) >= 0)
+			buffs--;
+		if (!buffs)
+			break;
+	} while (++i < MAX_CLOSE_WAIT);
+
+	if (buffs)
+		printk(KERN_CRIT "%s: unable to drain TX queue, %i buffer(s) "
+		       "left in NPE\n", dev->name, buffs);
+#if DEBUG_CLOSE
+	if (!buffs)
+		printk(KERN_DEBUG "Draining TX queues took %i cycles\n", i);
+#endif
+
+	msg.byte3 = 0;
+	if (npe_send_recv_message(port->npe, &msg, "ETH_DISABLE_LOOPBACK"))
+		printk(KERN_CRIT "%s: unable to disable loopback\n",
+		       dev->name);
+
+	phy_stop(port->phydev);
+
+	if (!ports_open)
+		qmgr_disable_irq(TXDONE_QUEUE);
+	destroy_queues(port);
+	release_queues(port);
+	return 0;
+}
+
+static const struct net_device_ops ixp4xx_netdev_ops = {
+	.ndo_open = eth_open,
+	.ndo_stop = eth_close,
+	.ndo_start_xmit = eth_xmit,
+	.ndo_set_rx_mode = eth_set_mcast_list,
+	.ndo_do_ioctl = eth_ioctl,
+	.ndo_change_mtu = eth_change_mtu,
+	.ndo_set_mac_address = eth_mac_addr,
+	.ndo_validate_addr = eth_validate_addr,
+};
+
+static int eth_init_one(struct platform_device *pdev)
+{
+	struct port *port;
+	struct net_device *dev;
+	struct eth_plat_info *plat = dev_get_platdata(&pdev->dev);
+	u32 regs_phys;
+	char phy_id[MII_BUS_ID_SIZE + 3];
+	int err;
+
+	if (!(dev = alloc_etherdev(sizeof(struct port))))
+		return -ENOMEM;
+
+	SET_NETDEV_DEV(dev, &pdev->dev);
+	port = netdev_priv(dev);
+	port->netdev = dev;
+	port->id = pdev->id;
+
+	switch (port->id) {
+	case IXP4XX_ETH_NPEA:
+		port->regs = (struct eth_regs __iomem *)IXP4XX_EthA_BASE_VIRT;
+		regs_phys  = IXP4XX_EthA_BASE_PHYS;
+		break;
+	case IXP4XX_ETH_NPEB:
+		port->regs = (struct eth_regs __iomem *)IXP4XX_EthB_BASE_VIRT;
+		regs_phys  = IXP4XX_EthB_BASE_PHYS;
+		break;
+	case IXP4XX_ETH_NPEC:
+		port->regs = (struct eth_regs __iomem *)IXP4XX_EthC_BASE_VIRT;
+		regs_phys  = IXP4XX_EthC_BASE_PHYS;
+		break;
+	default:
+		err = -ENODEV;
+		goto err_free;
+	}
+
+	dev->netdev_ops = &ixp4xx_netdev_ops;
+	dev->ethtool_ops = &ixp4xx_ethtool_ops;
+	dev->tx_queue_len = 100;
+
+	netif_napi_add(dev, &port->napi, eth_poll, NAPI_WEIGHT);
+
+	if (!(port->npe = npe_request(NPE_ID(port->id)))) {
+		err = -EIO;
+		goto err_free;
+	}
+
+	port->mem_res = request_mem_region(regs_phys, REGS_SIZE, dev->name);
+	if (!port->mem_res) {
+		err = -EBUSY;
+		goto err_npe_rel;
+	}
+
+	port->plat = plat;
+	npe_port_tab[NPE_ID(port->id)] = port;
+	memcpy(dev->dev_addr, plat->hwaddr, ETH_ALEN);
+
+	platform_set_drvdata(pdev, dev);
+
+	__raw_writel(DEFAULT_CORE_CNTRL | CORE_RESET,
+		     &port->regs->core_control);
+	udelay(50);
+	__raw_writel(DEFAULT_CORE_CNTRL, &port->regs->core_control);
+	udelay(50);
+
+	snprintf(phy_id, MII_BUS_ID_SIZE + 3, PHY_ID_FMT,
+		mdio_bus->id, plat->phy);
+	port->phydev = phy_connect(dev, phy_id, &ixp4xx_adjust_link,
+				   PHY_INTERFACE_MODE_MII);
+	if (IS_ERR(port->phydev)) {
+		err = PTR_ERR(port->phydev);
+		goto err_free_mem;
+	}
+
+	port->phydev->irq = PHY_POLL;
+
+	if ((err = register_netdev(dev)))
+		goto err_phy_dis;
+
+	printk(KERN_INFO "%s: MII PHY %i on %s\n", dev->name, plat->phy,
+	       npe_name(port->npe));
+
+	return 0;
+
+err_phy_dis:
+	phy_disconnect(port->phydev);
+err_free_mem:
+	npe_port_tab[NPE_ID(port->id)] = NULL;
+	release_resource(port->mem_res);
+err_npe_rel:
+	npe_release(port->npe);
+err_free:
+	free_netdev(dev);
+	return err;
+}
+
+static int eth_remove_one(struct platform_device *pdev)
+{
+	struct net_device *dev = platform_get_drvdata(pdev);
+	struct port *port = netdev_priv(dev);
+
+	unregister_netdev(dev);
+	phy_disconnect(port->phydev);
+	npe_port_tab[NPE_ID(port->id)] = NULL;
+	npe_release(port->npe);
+	release_resource(port->mem_res);
+	free_netdev(dev);
+	return 0;
+}
+
+static struct platform_driver ixp4xx_eth_driver = {
+	.driver.name	= DRV_NAME,
+	.probe		= eth_init_one,
+	.remove		= eth_remove_one,
+};
+
+static int __init eth_init_module(void)
+{
+	int err;
+	if ((err = ixp4xx_mdio_register()))
+		return err;
+	return platform_driver_register(&ixp4xx_eth_driver);
+}
+
+static void __exit eth_cleanup_module(void)
+{
+	platform_driver_unregister(&ixp4xx_eth_driver);
+	ixp4xx_mdio_remove();
+}
+
+MODULE_AUTHOR("Krzysztof Halasa");
+MODULE_DESCRIPTION("Intel IXP4xx Ethernet driver");
+MODULE_LICENSE("GPL v2");
+MODULE_ALIAS("platform:ixp4xx_eth");
+module_init(eth_init_module);
+module_exit(eth_cleanup_module);