stmmac: Move the STMicroelectronics driver

Move the STMicroelectronics driver into driver/net/ethernet/stmicro/ and
make the necessary Kconfig and Makefile changes.

CC: Giuseppe Cavallaro <peppe.cavallaro@st.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>

1 files changed, 0 insertions, 1895 deletions

diff --git a/drivers/net/stmmac/stmmac_main.c b/drivers/net/stmmac/stmmac_main.c
deleted file mode 100644
index c6e567e04eff..000000000000
--- a/drivers/net/stmmac/stmmac_main.c
+++ /dev/null
@@ -1,1895 +0,0 @@
-/*******************************************************************************
-  This is the driver for the ST MAC 10/100/1000 on-chip Ethernet controllers.
-  ST Ethernet IPs are built around a Synopsys IP Core.
-
-  Copyright (C) 2007-2009  STMicroelectronics Ltd
-
-  This program is free software; you can redistribute it and/or modify it
-  under the terms and conditions of the GNU General Public License,
-  version 2, as published by the Free Software Foundation.
-
-  This program is distributed in the hope it will be useful, but WITHOUT
-  ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
-  FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
-  more details.
-
-  You should have received a copy of the GNU General Public License along with
-  this program; if not, write to the Free Software Foundation, Inc.,
-  51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
-
-  The full GNU General Public License is included in this distribution in
-  the file called "COPYING".
-
-  Author: Giuseppe Cavallaro <peppe.cavallaro@st.com>
-
-  Documentation available at:
-	http://www.stlinux.com
-  Support available at:
-	https://bugzilla.stlinux.com/
-*******************************************************************************/
-
-#include <linux/module.h>
-#include <linux/init.h>
-#include <linux/kernel.h>
-#include <linux/interrupt.h>
-#include <linux/etherdevice.h>
-#include <linux/platform_device.h>
-#include <linux/ip.h>
-#include <linux/tcp.h>
-#include <linux/skbuff.h>
-#include <linux/ethtool.h>
-#include <linux/if_ether.h>
-#include <linux/crc32.h>
-#include <linux/mii.h>
-#include <linux/phy.h>
-#include <linux/if_vlan.h>
-#include <linux/dma-mapping.h>
-#include <linux/slab.h>
-#include <linux/prefetch.h>
-#include "stmmac.h"
-
-#define STMMAC_RESOURCE_NAME	"stmmaceth"
-
-#undef STMMAC_DEBUG
-/*#define STMMAC_DEBUG*/
-#ifdef STMMAC_DEBUG
-#define DBG(nlevel, klevel, fmt, args...) \
-		((void)(netif_msg_##nlevel(priv) && \
-		printk(KERN_##klevel fmt, ## args)))
-#else
-#define DBG(nlevel, klevel, fmt, args...) do { } while (0)
-#endif
-
-#undef STMMAC_RX_DEBUG
-/*#define STMMAC_RX_DEBUG*/
-#ifdef STMMAC_RX_DEBUG
-#define RX_DBG(fmt, args...)  printk(fmt, ## args)
-#else
-#define RX_DBG(fmt, args...)  do { } while (0)
-#endif
-
-#undef STMMAC_XMIT_DEBUG
-/*#define STMMAC_XMIT_DEBUG*/
-#ifdef STMMAC_TX_DEBUG
-#define TX_DBG(fmt, args...)  printk(fmt, ## args)
-#else
-#define TX_DBG(fmt, args...)  do { } while (0)
-#endif
-
-#define STMMAC_ALIGN(x)	L1_CACHE_ALIGN(x)
-#define JUMBO_LEN	9000
-
-/* Module parameters */
-#define TX_TIMEO 5000 /* default 5 seconds */
-static int watchdog = TX_TIMEO;
-module_param(watchdog, int, S_IRUGO | S_IWUSR);
-MODULE_PARM_DESC(watchdog, "Transmit timeout in milliseconds");
-
-static int debug = -1;		/* -1: default, 0: no output, 16:  all */
-module_param(debug, int, S_IRUGO | S_IWUSR);
-MODULE_PARM_DESC(debug, "Message Level (0: no output, 16: all)");
-
-static int phyaddr = -1;
-module_param(phyaddr, int, S_IRUGO);
-MODULE_PARM_DESC(phyaddr, "Physical device address");
-
-#define DMA_TX_SIZE 256
-static int dma_txsize = DMA_TX_SIZE;
-module_param(dma_txsize, int, S_IRUGO | S_IWUSR);
-MODULE_PARM_DESC(dma_txsize, "Number of descriptors in the TX list");
-
-#define DMA_RX_SIZE 256
-static int dma_rxsize = DMA_RX_SIZE;
-module_param(dma_rxsize, int, S_IRUGO | S_IWUSR);
-MODULE_PARM_DESC(dma_rxsize, "Number of descriptors in the RX list");
-
-static int flow_ctrl = FLOW_OFF;
-module_param(flow_ctrl, int, S_IRUGO | S_IWUSR);
-MODULE_PARM_DESC(flow_ctrl, "Flow control ability [on/off]");
-
-static int pause = PAUSE_TIME;
-module_param(pause, int, S_IRUGO | S_IWUSR);
-MODULE_PARM_DESC(pause, "Flow Control Pause Time");
-
-#define TC_DEFAULT 64
-static int tc = TC_DEFAULT;
-module_param(tc, int, S_IRUGO | S_IWUSR);
-MODULE_PARM_DESC(tc, "DMA threshold control value");
-
-/* Pay attention to tune this parameter; take care of both
- * hardware capability and network stabitily/performance impact.
- * Many tests showed that ~4ms latency seems to be good enough. */
-#ifdef CONFIG_STMMAC_TIMER
-#define DEFAULT_PERIODIC_RATE	256
-static int tmrate = DEFAULT_PERIODIC_RATE;
-module_param(tmrate, int, S_IRUGO | S_IWUSR);
-MODULE_PARM_DESC(tmrate, "External timer freq. (default: 256Hz)");
-#endif
-
-#define DMA_BUFFER_SIZE	BUF_SIZE_2KiB
-static int buf_sz = DMA_BUFFER_SIZE;
-module_param(buf_sz, int, S_IRUGO | S_IWUSR);
-MODULE_PARM_DESC(buf_sz, "DMA buffer size");
-
-static const u32 default_msg_level = (NETIF_MSG_DRV | NETIF_MSG_PROBE |
-				      NETIF_MSG_LINK | NETIF_MSG_IFUP |
-				      NETIF_MSG_IFDOWN | NETIF_MSG_TIMER);
-
-static irqreturn_t stmmac_interrupt(int irq, void *dev_id);
-
-/**
- * stmmac_verify_args - verify the driver parameters.
- * Description: it verifies if some wrong parameter is passed to the driver.
- * Note that wrong parameters are replaced with the default values.
- */
-static void stmmac_verify_args(void)
-{
-	if (unlikely(watchdog < 0))
-		watchdog = TX_TIMEO;
-	if (unlikely(dma_rxsize < 0))
-		dma_rxsize = DMA_RX_SIZE;
-	if (unlikely(dma_txsize < 0))
-		dma_txsize = DMA_TX_SIZE;
-	if (unlikely((buf_sz < DMA_BUFFER_SIZE) || (buf_sz > BUF_SIZE_16KiB)))
-		buf_sz = DMA_BUFFER_SIZE;
-	if (unlikely(flow_ctrl > 1))
-		flow_ctrl = FLOW_AUTO;
-	else if (likely(flow_ctrl < 0))
-		flow_ctrl = FLOW_OFF;
-	if (unlikely((pause < 0) || (pause > 0xffff)))
-		pause = PAUSE_TIME;
-}
-
-#if defined(STMMAC_XMIT_DEBUG) || defined(STMMAC_RX_DEBUG)
-static void print_pkt(unsigned char *buf, int len)
-{
-	int j;
-	pr_info("len = %d byte, buf addr: 0x%p", len, buf);
-	for (j = 0; j < len; j++) {
-		if ((j % 16) == 0)
-			pr_info("\n %03x:", j);
-		pr_info(" %02x", buf[j]);
-	}
-	pr_info("\n");
-}
-#endif
-
-/* minimum number of free TX descriptors required to wake up TX process */
-#define STMMAC_TX_THRESH(x)	(x->dma_tx_size/4)
-
-static inline u32 stmmac_tx_avail(struct stmmac_priv *priv)
-{
-	return priv->dirty_tx + priv->dma_tx_size - priv->cur_tx - 1;
-}
-
-/* On some ST platforms, some HW system configuraton registers have to be
- * set according to the link speed negotiated.
- */
-static inline void stmmac_hw_fix_mac_speed(struct stmmac_priv *priv)
-{
-	struct phy_device *phydev = priv->phydev;
-
-	if (likely(priv->plat->fix_mac_speed))
-		priv->plat->fix_mac_speed(priv->plat->bsp_priv,
-					  phydev->speed);
-}
-
-/**
- * stmmac_adjust_link
- * @dev: net device structure
- * Description: it adjusts the link parameters.
- */
-static void stmmac_adjust_link(struct net_device *dev)
-{
-	struct stmmac_priv *priv = netdev_priv(dev);
-	struct phy_device *phydev = priv->phydev;
-	unsigned long flags;
-	int new_state = 0;
-	unsigned int fc = priv->flow_ctrl, pause_time = priv->pause;
-
-	if (phydev == NULL)
-		return;
-
-	DBG(probe, DEBUG, "stmmac_adjust_link: called.  address %d link %d\n",
-	    phydev->addr, phydev->link);
-
-	spin_lock_irqsave(&priv->lock, flags);
-	if (phydev->link) {
-		u32 ctrl = readl(priv->ioaddr + MAC_CTRL_REG);
-
-		/* Now we make sure that we can be in full duplex mode.
-		 * If not, we operate in half-duplex mode. */
-		if (phydev->duplex != priv->oldduplex) {
-			new_state = 1;
-			if (!(phydev->duplex))
-				ctrl &= ~priv->hw->link.duplex;
-			else
-				ctrl |= priv->hw->link.duplex;
-			priv->oldduplex = phydev->duplex;
-		}
-		/* Flow Control operation */
-		if (phydev->pause)
-			priv->hw->mac->flow_ctrl(priv->ioaddr, phydev->duplex,
-						 fc, pause_time);
-
-		if (phydev->speed != priv->speed) {
-			new_state = 1;
-			switch (phydev->speed) {
-			case 1000:
-				if (likely(priv->plat->has_gmac))
-					ctrl &= ~priv->hw->link.port;
-				stmmac_hw_fix_mac_speed(priv);
-				break;
-			case 100:
-			case 10:
-				if (priv->plat->has_gmac) {
-					ctrl |= priv->hw->link.port;
-					if (phydev->speed == SPEED_100) {
-						ctrl |= priv->hw->link.speed;
-					} else {
-						ctrl &= ~(priv->hw->link.speed);
-					}
-				} else {
-					ctrl &= ~priv->hw->link.port;
-				}
-				stmmac_hw_fix_mac_speed(priv);
-				break;
-			default:
-				if (netif_msg_link(priv))
-					pr_warning("%s: Speed (%d) is not 10"
-				       " or 100!\n", dev->name, phydev->speed);
-				break;
-			}
-
-			priv->speed = phydev->speed;
-		}
-
-		writel(ctrl, priv->ioaddr + MAC_CTRL_REG);
-
-		if (!priv->oldlink) {
-			new_state = 1;
-			priv->oldlink = 1;
-		}
-	} else if (priv->oldlink) {
-		new_state = 1;
-		priv->oldlink = 0;
-		priv->speed = 0;
-		priv->oldduplex = -1;
-	}
-
-	if (new_state && netif_msg_link(priv))
-		phy_print_status(phydev);
-
-	spin_unlock_irqrestore(&priv->lock, flags);
-
-	DBG(probe, DEBUG, "stmmac_adjust_link: exiting\n");
-}
-
-/**
- * stmmac_init_phy - PHY initialization
- * @dev: net device structure
- * Description: it initializes the driver's PHY state, and attaches the PHY
- * to the mac driver.
- *  Return value:
- *  0 on success
- */
-static int stmmac_init_phy(struct net_device *dev)
-{
-	struct stmmac_priv *priv = netdev_priv(dev);
-	struct phy_device *phydev;
-	char phy_id[MII_BUS_ID_SIZE + 3];
-	char bus_id[MII_BUS_ID_SIZE];
-
-	priv->oldlink = 0;
-	priv->speed = 0;
-	priv->oldduplex = -1;
-
-	snprintf(bus_id, MII_BUS_ID_SIZE, "%x", priv->plat->bus_id);
-	snprintf(phy_id, MII_BUS_ID_SIZE + 3, PHY_ID_FMT, bus_id,
-		 priv->plat->phy_addr);
-	pr_debug("stmmac_init_phy:  trying to attach to %s\n", phy_id);
-
-	phydev = phy_connect(dev, phy_id, &stmmac_adjust_link, 0,
-			     priv->plat->interface);
-
-	if (IS_ERR(phydev)) {
-		pr_err("%s: Could not attach to PHY\n", dev->name);
-		return PTR_ERR(phydev);
-	}
-
-	/*
-	 * Broken HW is sometimes missing the pull-up resistor on the
-	 * MDIO line, which results in reads to non-existent devices returning
-	 * 0 rather than 0xffff. Catch this here and treat 0 as a non-existent
-	 * device as well.
-	 * Note: phydev->phy_id is the result of reading the UID PHY registers.
-	 */
-	if (phydev->phy_id == 0) {
-		phy_disconnect(phydev);
-		return -ENODEV;
-	}
-	pr_debug("stmmac_init_phy:  %s: attached to PHY (UID 0x%x)"
-		 " Link = %d\n", dev->name, phydev->phy_id, phydev->link);
-
-	priv->phydev = phydev;
-
-	return 0;
-}
-
-static inline void stmmac_enable_mac(void __iomem *ioaddr)
-{
-	u32 value = readl(ioaddr + MAC_CTRL_REG);
-
-	value |= MAC_RNABLE_RX | MAC_ENABLE_TX;
-	writel(value, ioaddr + MAC_CTRL_REG);
-}
-
-static inline void stmmac_disable_mac(void __iomem *ioaddr)
-{
-	u32 value = readl(ioaddr + MAC_CTRL_REG);
-
-	value &= ~(MAC_ENABLE_TX | MAC_RNABLE_RX);
-	writel(value, ioaddr + MAC_CTRL_REG);
-}
-
-/**
- * display_ring
- * @p: pointer to the ring.
- * @size: size of the ring.
- * Description: display all the descriptors within the ring.
- */
-static void display_ring(struct dma_desc *p, int size)
-{
-	struct tmp_s {
-		u64 a;
-		unsigned int b;
-		unsigned int c;
-	};
-	int i;
-	for (i = 0; i < size; i++) {
-		struct tmp_s *x = (struct tmp_s *)(p + i);
-		pr_info("\t%d [0x%x]: DES0=0x%x DES1=0x%x BUF1=0x%x BUF2=0x%x",
-		       i, (unsigned int)virt_to_phys(&p[i]),
-		       (unsigned int)(x->a), (unsigned int)((x->a) >> 32),
-		       x->b, x->c);
-		pr_info("\n");
-	}
-}
-
-/**
- * init_dma_desc_rings - init the RX/TX descriptor rings
- * @dev: net device structure
- * Description:  this function initializes the DMA RX/TX descriptors
- * and allocates the socket buffers.
- */
-static void init_dma_desc_rings(struct net_device *dev)
-{
-	int i;
-	struct stmmac_priv *priv = netdev_priv(dev);
-	struct sk_buff *skb;
-	unsigned int txsize = priv->dma_tx_size;
-	unsigned int rxsize = priv->dma_rx_size;
-	unsigned int bfsize = priv->dma_buf_sz;
-	int buff2_needed = 0, dis_ic = 0;
-
-	/* Set the Buffer size according to the MTU;
-	 * indeed, in case of jumbo we need to bump-up the buffer sizes.
-	 */
-	if (unlikely(dev->mtu >= BUF_SIZE_8KiB))
-		bfsize = BUF_SIZE_16KiB;
-	else if (unlikely(dev->mtu >= BUF_SIZE_4KiB))
-		bfsize = BUF_SIZE_8KiB;
-	else if (unlikely(dev->mtu >= BUF_SIZE_2KiB))
-		bfsize = BUF_SIZE_4KiB;
-	else if (unlikely(dev->mtu >= DMA_BUFFER_SIZE))
-		bfsize = BUF_SIZE_2KiB;
-	else
-		bfsize = DMA_BUFFER_SIZE;
-
-#ifdef CONFIG_STMMAC_TIMER
-	/* Disable interrupts on completion for the reception if timer is on */
-	if (likely(priv->tm->enable))
-		dis_ic = 1;
-#endif
-	/* If the MTU exceeds 8k so use the second buffer in the chain */
-	if (bfsize >= BUF_SIZE_8KiB)
-		buff2_needed = 1;
-
-	DBG(probe, INFO, "stmmac: txsize %d, rxsize %d, bfsize %d\n",
-	    txsize, rxsize, bfsize);
-
-	priv->rx_skbuff_dma = kmalloc(rxsize * sizeof(dma_addr_t), GFP_KERNEL);
-	priv->rx_skbuff =
-	    kmalloc(sizeof(struct sk_buff *) * rxsize, GFP_KERNEL);
-	priv->dma_rx =
-	    (struct dma_desc *)dma_alloc_coherent(priv->device,
-						  rxsize *
-						  sizeof(struct dma_desc),
-						  &priv->dma_rx_phy,
-						  GFP_KERNEL);
-	priv->tx_skbuff = kmalloc(sizeof(struct sk_buff *) * txsize,
-				       GFP_KERNEL);
-	priv->dma_tx =
-	    (struct dma_desc *)dma_alloc_coherent(priv->device,
-						  txsize *
-						  sizeof(struct dma_desc),
-						  &priv->dma_tx_phy,
-						  GFP_KERNEL);
-
-	if ((priv->dma_rx == NULL) || (priv->dma_tx == NULL)) {
-		pr_err("%s:ERROR allocating the DMA Tx/Rx desc\n", __func__);
-		return;
-	}
-
-	DBG(probe, INFO, "stmmac (%s) DMA desc rings: virt addr (Rx %p, "
-	    "Tx %p)\n\tDMA phy addr (Rx 0x%08x, Tx 0x%08x)\n",
-	    dev->name, priv->dma_rx, priv->dma_tx,
-	    (unsigned int)priv->dma_rx_phy, (unsigned int)priv->dma_tx_phy);
-
-	/* RX INITIALIZATION */
-	DBG(probe, INFO, "stmmac: SKB addresses:\n"
-			 "skb\t\tskb data\tdma data\n");
-
-	for (i = 0; i < rxsize; i++) {
-		struct dma_desc *p = priv->dma_rx + i;
-
-		skb = netdev_alloc_skb_ip_align(dev, bfsize);
-		if (unlikely(skb == NULL)) {
-			pr_err("%s: Rx init fails; skb is NULL\n", __func__);
-			break;
-		}
-		priv->rx_skbuff[i] = skb;
-		priv->rx_skbuff_dma[i] = dma_map_single(priv->device, skb->data,
-						bfsize, DMA_FROM_DEVICE);
-
-		p->des2 = priv->rx_skbuff_dma[i];
-		if (unlikely(buff2_needed))
-			p->des3 = p->des2 + BUF_SIZE_8KiB;
-		DBG(probe, INFO, "[%p]\t[%p]\t[%x]\n", priv->rx_skbuff[i],
-			priv->rx_skbuff[i]->data, priv->rx_skbuff_dma[i]);
-	}
-	priv->cur_rx = 0;
-	priv->dirty_rx = (unsigned int)(i - rxsize);
-	priv->dma_buf_sz = bfsize;
-	buf_sz = bfsize;
-
-	/* TX INITIALIZATION */
-	for (i = 0; i < txsize; i++) {
-		priv->tx_skbuff[i] = NULL;
-		priv->dma_tx[i].des2 = 0;
-	}
-	priv->dirty_tx = 0;
-	priv->cur_tx = 0;
-
-	/* Clear the Rx/Tx descriptors */
-	priv->hw->desc->init_rx_desc(priv->dma_rx, rxsize, dis_ic);
-	priv->hw->desc->init_tx_desc(priv->dma_tx, txsize);
-
-	if (netif_msg_hw(priv)) {
-		pr_info("RX descriptor ring:\n");
-		display_ring(priv->dma_rx, rxsize);
-		pr_info("TX descriptor ring:\n");
-		display_ring(priv->dma_tx, txsize);
-	}
-}
-
-static void dma_free_rx_skbufs(struct stmmac_priv *priv)
-{
-	int i;
-
-	for (i = 0; i < priv->dma_rx_size; i++) {
-		if (priv->rx_skbuff[i]) {
-			dma_unmap_single(priv->device, priv->rx_skbuff_dma[i],
-					 priv->dma_buf_sz, DMA_FROM_DEVICE);
-			dev_kfree_skb_any(priv->rx_skbuff[i]);
-		}
-		priv->rx_skbuff[i] = NULL;
-	}
-}
-
-static void dma_free_tx_skbufs(struct stmmac_priv *priv)
-{
-	int i;
-
-	for (i = 0; i < priv->dma_tx_size; i++) {
-		if (priv->tx_skbuff[i] != NULL) {
-			struct dma_desc *p = priv->dma_tx + i;
-			if (p->des2)
-				dma_unmap_single(priv->device, p->des2,
-						 priv->hw->desc->get_tx_len(p),
-						 DMA_TO_DEVICE);
-			dev_kfree_skb_any(priv->tx_skbuff[i]);
-			priv->tx_skbuff[i] = NULL;
-		}
-	}
-}
-
-static void free_dma_desc_resources(struct stmmac_priv *priv)
-{
-	/* Release the DMA TX/RX socket buffers */
-	dma_free_rx_skbufs(priv);
-	dma_free_tx_skbufs(priv);
-
-	/* Free the region of consistent memory previously allocated for
-	 * the DMA */
-	dma_free_coherent(priv->device,
-			  priv->dma_tx_size * sizeof(struct dma_desc),
-			  priv->dma_tx, priv->dma_tx_phy);
-	dma_free_coherent(priv->device,
-			  priv->dma_rx_size * sizeof(struct dma_desc),
-			  priv->dma_rx, priv->dma_rx_phy);
-	kfree(priv->rx_skbuff_dma);
-	kfree(priv->rx_skbuff);
-	kfree(priv->tx_skbuff);
-}
-
-/**
- *  stmmac_dma_operation_mode - HW DMA operation mode
- *  @priv : pointer to the private device structure.
- *  Description: it sets the DMA operation mode: tx/rx DMA thresholds
- *  or Store-And-Forward capability.
- */
-static void stmmac_dma_operation_mode(struct stmmac_priv *priv)
-{
-	if (likely(priv->plat->force_sf_dma_mode ||
-		((priv->plat->tx_coe) && (!priv->no_csum_insertion)))) {
-		/*
-		 * In case of GMAC, SF mode can be enabled
-		 * to perform the TX COE in HW. This depends on:
-		 * 1) TX COE if actually supported
-		 * 2) There is no bugged Jumbo frame support
-		 *    that needs to not insert csum in the TDES.
-		 */
-		priv->hw->dma->dma_mode(priv->ioaddr,
-					SF_DMA_MODE, SF_DMA_MODE);
-		tc = SF_DMA_MODE;
-	} else
-		priv->hw->dma->dma_mode(priv->ioaddr, tc, SF_DMA_MODE);
-}
-
-/**
- * stmmac_tx:
- * @priv: private driver structure
- * Description: it reclaims resources after transmission completes.
- */
-static void stmmac_tx(struct stmmac_priv *priv)
-{
-	unsigned int txsize = priv->dma_tx_size;
-
-	while (priv->dirty_tx != priv->cur_tx) {
-		int last;
-		unsigned int entry = priv->dirty_tx % txsize;
-		struct sk_buff *skb = priv->tx_skbuff[entry];
-		struct dma_desc *p = priv->dma_tx + entry;
-
-		/* Check if the descriptor is owned by the DMA. */
-		if (priv->hw->desc->get_tx_owner(p))
-			break;
-
-		/* Verify tx error by looking at the last segment */
-		last = priv->hw->desc->get_tx_ls(p);
-		if (likely(last)) {
-			int tx_error =
-				priv->hw->desc->tx_status(&priv->dev->stats,
-							  &priv->xstats, p,
-							  priv->ioaddr);
-			if (likely(tx_error == 0)) {
-				priv->dev->stats.tx_packets++;
-				priv->xstats.tx_pkt_n++;
-			} else
-				priv->dev->stats.tx_errors++;
-		}
-		TX_DBG("%s: curr %d, dirty %d\n", __func__,
-			priv->cur_tx, priv->dirty_tx);
-
-		if (likely(p->des2))
-			dma_unmap_single(priv->device, p->des2,
-					 priv->hw->desc->get_tx_len(p),
-					 DMA_TO_DEVICE);
-		if (unlikely(p->des3))
-			p->des3 = 0;
-
-		if (likely(skb != NULL)) {
-			/*
-			 * If there's room in the queue (limit it to size)
-			 * we add this skb back into the pool,
-			 * if it's the right size.
-			 */
-			if ((skb_queue_len(&priv->rx_recycle) <
-				priv->dma_rx_size) &&
-				skb_recycle_check(skb, priv->dma_buf_sz))
-				__skb_queue_head(&priv->rx_recycle, skb);
-			else
-				dev_kfree_skb(skb);
-
-			priv->tx_skbuff[entry] = NULL;
-		}
-
-		priv->hw->desc->release_tx_desc(p);
-
-		entry = (++priv->dirty_tx) % txsize;
-	}
-	if (unlikely(netif_queue_stopped(priv->dev) &&
-		     stmmac_tx_avail(priv) > STMMAC_TX_THRESH(priv))) {
-		netif_tx_lock(priv->dev);
-		if (netif_queue_stopped(priv->dev) &&
-		     stmmac_tx_avail(priv) > STMMAC_TX_THRESH(priv)) {
-			TX_DBG("%s: restart transmit\n", __func__);
-			netif_wake_queue(priv->dev);
-		}
-		netif_tx_unlock(priv->dev);
-	}
-}
-
-static inline void stmmac_enable_irq(struct stmmac_priv *priv)
-{
-#ifdef CONFIG_STMMAC_TIMER
-	if (likely(priv->tm->enable))
-		priv->tm->timer_start(tmrate);
-	else
-#endif
-		priv->hw->dma->enable_dma_irq(priv->ioaddr);
-}
-
-static inline void stmmac_disable_irq(struct stmmac_priv *priv)
-{
-#ifdef CONFIG_STMMAC_TIMER
-	if (likely(priv->tm->enable))
-		priv->tm->timer_stop();
-	else
-#endif
-		priv->hw->dma->disable_dma_irq(priv->ioaddr);
-}
-
-static int stmmac_has_work(struct stmmac_priv *priv)
-{
-	unsigned int has_work = 0;
-	int rxret, tx_work = 0;
-
-	rxret = priv->hw->desc->get_rx_owner(priv->dma_rx +
-		(priv->cur_rx % priv->dma_rx_size));
-
-	if (priv->dirty_tx != priv->cur_tx)
-		tx_work = 1;
-
-	if (likely(!rxret || tx_work))
-		has_work = 1;
-
-	return has_work;
-}
-
-static inline void _stmmac_schedule(struct stmmac_priv *priv)
-{
-	if (likely(stmmac_has_work(priv))) {
-		stmmac_disable_irq(priv);
-		napi_schedule(&priv->napi);
-	}
-}
-
-#ifdef CONFIG_STMMAC_TIMER
-void stmmac_schedule(struct net_device *dev)
-{
-	struct stmmac_priv *priv = netdev_priv(dev);
-
-	priv->xstats.sched_timer_n++;
-
-	_stmmac_schedule(priv);
-}
-
-static void stmmac_no_timer_started(unsigned int x)
-{;
-};
-
-static void stmmac_no_timer_stopped(void)
-{;
-};
-#endif
-
-/**
- * stmmac_tx_err:
- * @priv: pointer to the private device structure
- * Description: it cleans the descriptors and restarts the transmission
- * in case of errors.
- */
-static void stmmac_tx_err(struct stmmac_priv *priv)
-{
-
-	netif_stop_queue(priv->dev);
-
-	priv->hw->dma->stop_tx(priv->ioaddr);
-	dma_free_tx_skbufs(priv);
-	priv->hw->desc->init_tx_desc(priv->dma_tx, priv->dma_tx_size);
-	priv->dirty_tx = 0;
-	priv->cur_tx = 0;
-	priv->hw->dma->start_tx(priv->ioaddr);
-
-	priv->dev->stats.tx_errors++;
-	netif_wake_queue(priv->dev);
-}
-
-
-static void stmmac_dma_interrupt(struct stmmac_priv *priv)
-{
-	int status;
-
-	status = priv->hw->dma->dma_interrupt(priv->ioaddr, &priv->xstats);
-	if (likely(status == handle_tx_rx))
-		_stmmac_schedule(priv);
-
-	else if (unlikely(status == tx_hard_error_bump_tc)) {
-		/* Try to bump up the dma threshold on this failure */
-		if (unlikely(tc != SF_DMA_MODE) && (tc <= 256)) {
-			tc += 64;
-			priv->hw->dma->dma_mode(priv->ioaddr, tc, SF_DMA_MODE);
-			priv->xstats.threshold = tc;
-		}
-	} else if (unlikely(status == tx_hard_error))
-		stmmac_tx_err(priv);
-}
-
-/**
- *  stmmac_open - open entry point of the driver
- *  @dev : pointer to the device structure.
- *  Description:
- *  This function is the open entry point of the driver.
- *  Return value:
- *  0 on success and an appropriate (-)ve integer as defined in errno.h
- *  file on failure.
- */
-static int stmmac_open(struct net_device *dev)
-{
-	struct stmmac_priv *priv = netdev_priv(dev);
-	int ret;
-
-	/* Check that the MAC address is valid.  If its not, refuse
-	 * to bring the device up. The user must specify an
-	 * address using the following linux command:
-	 *      ifconfig eth0 hw ether xx:xx:xx:xx:xx:xx  */
-	if (!is_valid_ether_addr(dev->dev_addr)) {
-		random_ether_addr(dev->dev_addr);
-		pr_warning("%s: generated random MAC address %pM\n", dev->name,
-			dev->dev_addr);
-	}
-
-	stmmac_verify_args();
-
-#ifdef CONFIG_STMMAC_TIMER
-	priv->tm = kzalloc(sizeof(struct stmmac_timer *), GFP_KERNEL);
-	if (unlikely(priv->tm == NULL)) {
-		pr_err("%s: ERROR: timer memory alloc failed\n", __func__);
-		return -ENOMEM;
-	}
-	priv->tm->freq = tmrate;
-
-	/* Test if the external timer can be actually used.
-	 * In case of failure continue without timer. */
-	if (unlikely((stmmac_open_ext_timer(dev, priv->tm)) < 0)) {
-		pr_warning("stmmaceth: cannot attach the external timer.\n");
-		priv->tm->freq = 0;
-		priv->tm->timer_start = stmmac_no_timer_started;
-		priv->tm->timer_stop = stmmac_no_timer_stopped;
-	} else
-		priv->tm->enable = 1;
-#endif
-	ret = stmmac_init_phy(dev);
-	if (unlikely(ret)) {
-		pr_err("%s: Cannot attach to PHY (error: %d)\n", __func__, ret);
-		goto open_error;
-	}
-
-	/* Create and initialize the TX/RX descriptors chains. */
-	priv->dma_tx_size = STMMAC_ALIGN(dma_txsize);
-	priv->dma_rx_size = STMMAC_ALIGN(dma_rxsize);
-	priv->dma_buf_sz = STMMAC_ALIGN(buf_sz);
-	init_dma_desc_rings(dev);
-
-	/* DMA initialization and SW reset */
-	ret = priv->hw->dma->init(priv->ioaddr, priv->plat->pbl,
-				  priv->dma_tx_phy, priv->dma_rx_phy);
-	if (ret < 0) {
-		pr_err("%s: DMA initialization failed\n", __func__);
-		goto open_error;
-	}
-
-	/* Copy the MAC addr into the HW  */
-	priv->hw->mac->set_umac_addr(priv->ioaddr, dev->dev_addr, 0);
-	/* If required, perform hw setup of the bus. */
-	if (priv->plat->bus_setup)
-		priv->plat->bus_setup(priv->ioaddr);
-	/* Initialize the MAC Core */
-	priv->hw->mac->core_init(priv->ioaddr);
-
-	priv->rx_coe = priv->hw->mac->rx_coe(priv->ioaddr);
-	if (priv->rx_coe)
-		pr_info("stmmac: Rx Checksum Offload Engine supported\n");
-	if (priv->plat->tx_coe)
-		pr_info("\tTX Checksum insertion supported\n");
-	netdev_update_features(dev);
-
-	/* Initialise the MMC (if present) to disable all interrupts. */
-	writel(0xffffffff, priv->ioaddr + MMC_HIGH_INTR_MASK);
-	writel(0xffffffff, priv->ioaddr + MMC_LOW_INTR_MASK);
-
-	/* Request the IRQ lines */
-	ret = request_irq(dev->irq, stmmac_interrupt,
-			 IRQF_SHARED, dev->name, dev);
-	if (unlikely(ret < 0)) {
-		pr_err("%s: ERROR: allocating the IRQ %d (error: %d)\n",
-		       __func__, dev->irq, ret);
-		goto open_error;
-	}
-
-	/* Enable the MAC Rx/Tx */
-	stmmac_enable_mac(priv->ioaddr);
-
-	/* Set the HW DMA mode and the COE */
-	stmmac_dma_operation_mode(priv);
-
-	/* Extra statistics */
-	memset(&priv->xstats, 0, sizeof(struct stmmac_extra_stats));
-	priv->xstats.threshold = tc;
-
-	/* Start the ball rolling... */
-	DBG(probe, DEBUG, "%s: DMA RX/TX processes started...\n", dev->name);
-	priv->hw->dma->start_tx(priv->ioaddr);
-	priv->hw->dma->start_rx(priv->ioaddr);
-
-#ifdef CONFIG_STMMAC_TIMER
-	priv->tm->timer_start(tmrate);
-#endif
-	/* Dump DMA/MAC registers */
-	if (netif_msg_hw(priv)) {
-		priv->hw->mac->dump_regs(priv->ioaddr);
-		priv->hw->dma->dump_regs(priv->ioaddr);
-	}
-
-	if (priv->phydev)
-		phy_start(priv->phydev);
-
-	napi_enable(&priv->napi);
-	skb_queue_head_init(&priv->rx_recycle);
-	netif_start_queue(dev);
-
-	return 0;
-
-open_error:
-#ifdef CONFIG_STMMAC_TIMER
-	kfree(priv->tm);
-#endif
-	if (priv->phydev)
-		phy_disconnect(priv->phydev);
-
-	return ret;
-}
-
-/**
- *  stmmac_release - close entry point of the driver
- *  @dev : device pointer.
- *  Description:
- *  This is the stop entry point of the driver.
- */
-static int stmmac_release(struct net_device *dev)
-{
-	struct stmmac_priv *priv = netdev_priv(dev);
-
-	/* Stop and disconnect the PHY */
-	if (priv->phydev) {
-		phy_stop(priv->phydev);
-		phy_disconnect(priv->phydev);
-		priv->phydev = NULL;
-	}
-
-	netif_stop_queue(dev);
-
-#ifdef CONFIG_STMMAC_TIMER
-	/* Stop and release the timer */
-	stmmac_close_ext_timer();
-	if (priv->tm != NULL)
-		kfree(priv->tm);
-#endif
-	napi_disable(&priv->napi);
-	skb_queue_purge(&priv->rx_recycle);
-
-	/* Free the IRQ lines */
-	free_irq(dev->irq, dev);
-
-	/* Stop TX/RX DMA and clear the descriptors */
-	priv->hw->dma->stop_tx(priv->ioaddr);
-	priv->hw->dma->stop_rx(priv->ioaddr);
-
-	/* Release and free the Rx/Tx resources */
-	free_dma_desc_resources(priv);
-
-	/* Disable the MAC Rx/Tx */
-	stmmac_disable_mac(priv->ioaddr);
-
-	netif_carrier_off(dev);
-
-	return 0;
-}
-
-static unsigned int stmmac_handle_jumbo_frames(struct sk_buff *skb,
-					       struct net_device *dev,
-					       int csum_insertion)
-{
-	struct stmmac_priv *priv = netdev_priv(dev);
-	unsigned int nopaged_len = skb_headlen(skb);
-	unsigned int txsize = priv->dma_tx_size;
-	unsigned int entry = priv->cur_tx % txsize;
-	struct dma_desc *desc = priv->dma_tx + entry;
-
-	if (nopaged_len > BUF_SIZE_8KiB) {
-
-		int buf2_size = nopaged_len - BUF_SIZE_8KiB;
-
-		desc->des2 = dma_map_single(priv->device, skb->data,
-					    BUF_SIZE_8KiB, DMA_TO_DEVICE);
-		desc->des3 = desc->des2 + BUF_SIZE_4KiB;
-		priv->hw->desc->prepare_tx_desc(desc, 1, BUF_SIZE_8KiB,
-						csum_insertion);
-
-		entry = (++priv->cur_tx) % txsize;
-		desc = priv->dma_tx + entry;
-
-		desc->des2 = dma_map_single(priv->device,
-					skb->data + BUF_SIZE_8KiB,
-					buf2_size, DMA_TO_DEVICE);
-		desc->des3 = desc->des2 + BUF_SIZE_4KiB;
-		priv->hw->desc->prepare_tx_desc(desc, 0, buf2_size,
-						csum_insertion);
-		priv->hw->desc->set_tx_owner(desc);
-		priv->tx_skbuff[entry] = NULL;
-	} else {
-		desc->des2 = dma_map_single(priv->device, skb->data,
-					nopaged_len, DMA_TO_DEVICE);
-		desc->des3 = desc->des2 + BUF_SIZE_4KiB;
-		priv->hw->desc->prepare_tx_desc(desc, 1, nopaged_len,
-						csum_insertion);
-	}
-	return entry;
-}
-
-/**
- *  stmmac_xmit:
- *  @skb : the socket buffer
- *  @dev : device pointer
- *  Description : Tx entry point of the driver.
- */
-static netdev_tx_t stmmac_xmit(struct sk_buff *skb, struct net_device *dev)
-{
-	struct stmmac_priv *priv = netdev_priv(dev);
-	unsigned int txsize = priv->dma_tx_size;
-	unsigned int entry;
-	int i, csum_insertion = 0;
-	int nfrags = skb_shinfo(skb)->nr_frags;
-	struct dma_desc *desc, *first;
-
-	if (unlikely(stmmac_tx_avail(priv) < nfrags + 1)) {
-		if (!netif_queue_stopped(dev)) {
-			netif_stop_queue(dev);
-			/* This is a hard error, log it. */
-			pr_err("%s: BUG! Tx Ring full when queue awake\n",
-				__func__);
-		}
-		return NETDEV_TX_BUSY;
-	}
-
-	entry = priv->cur_tx % txsize;
-
-#ifdef STMMAC_XMIT_DEBUG
-	if ((skb->len > ETH_FRAME_LEN) || nfrags)
-		pr_info("stmmac xmit:\n"
-		       "\tskb addr %p - len: %d - nopaged_len: %d\n"
-		       "\tn_frags: %d - ip_summed: %d - %s gso\n",
-		       skb, skb->len, skb_headlen(skb), nfrags, skb->ip_summed,
-		       !skb_is_gso(skb) ? "isn't" : "is");
-#endif
-
-	csum_insertion = (skb->ip_summed == CHECKSUM_PARTIAL);
-
-	desc = priv->dma_tx + entry;
-	first = desc;
-
-#ifdef STMMAC_XMIT_DEBUG
-	if ((nfrags > 0) || (skb->len > ETH_FRAME_LEN))
-		pr_debug("stmmac xmit: skb len: %d, nopaged_len: %d,\n"
-		       "\t\tn_frags: %d, ip_summed: %d\n",
-		       skb->len, skb_headlen(skb), nfrags, skb->ip_summed);
-#endif
-	priv->tx_skbuff[entry] = skb;
-	if (unlikely(skb->len >= BUF_SIZE_4KiB)) {
-		entry = stmmac_handle_jumbo_frames(skb, dev, csum_insertion);
-		desc = priv->dma_tx + entry;
-	} else {
-		unsigned int nopaged_len = skb_headlen(skb);
-		desc->des2 = dma_map_single(priv->device, skb->data,
-					nopaged_len, DMA_TO_DEVICE);
-		priv->hw->desc->prepare_tx_desc(desc, 1, nopaged_len,
-						csum_insertion);
-	}
-
-	for (i = 0; i < nfrags; i++) {
-		skb_frag_t *frag = &skb_shinfo(skb)->frags[i];
-		int len = frag->size;
-
-		entry = (++priv->cur_tx) % txsize;
-		desc = priv->dma_tx + entry;
-
-		TX_DBG("\t[entry %d] segment len: %d\n", entry, len);
-		desc->des2 = dma_map_page(priv->device, frag->page,
-					  frag->page_offset,
-					  len, DMA_TO_DEVICE);
-		priv->tx_skbuff[entry] = NULL;
-		priv->hw->desc->prepare_tx_desc(desc, 0, len, csum_insertion);
-		wmb();
-		priv->hw->desc->set_tx_owner(desc);
-	}
-
-	/* Interrupt on completition only for the latest segment */
-	priv->hw->desc->close_tx_desc(desc);
-
-#ifdef CONFIG_STMMAC_TIMER
-	/* Clean IC while using timer */
-	if (likely(priv->tm->enable))
-		priv->hw->desc->clear_tx_ic(desc);
-#endif
-
-	wmb();
-
-	/* To avoid raise condition */
-	priv->hw->desc->set_tx_owner(first);
-
-	priv->cur_tx++;
-
-#ifdef STMMAC_XMIT_DEBUG
-	if (netif_msg_pktdata(priv)) {
-		pr_info("stmmac xmit: current=%d, dirty=%d, entry=%d, "
-		       "first=%p, nfrags=%d\n",
-		       (priv->cur_tx % txsize), (priv->dirty_tx % txsize),
-		       entry, first, nfrags);
-		display_ring(priv->dma_tx, txsize);
-		pr_info(">>> frame to be transmitted: ");
-		print_pkt(skb->data, skb->len);
-	}
-#endif
-	if (unlikely(stmmac_tx_avail(priv) <= (MAX_SKB_FRAGS + 1))) {
-		TX_DBG("%s: stop transmitted packets\n", __func__);
-		netif_stop_queue(dev);
-	}
-
-	dev->stats.tx_bytes += skb->len;
-
-	skb_tx_timestamp(skb);
-
-	priv->hw->dma->enable_dma_transmission(priv->ioaddr);
-
-	return NETDEV_TX_OK;
-}
-
-static inline void stmmac_rx_refill(struct stmmac_priv *priv)
-{
-	unsigned int rxsize = priv->dma_rx_size;
-	int bfsize = priv->dma_buf_sz;
-	struct dma_desc *p = priv->dma_rx;
-
-	for (; priv->cur_rx - priv->dirty_rx > 0; priv->dirty_rx++) {
-		unsigned int entry = priv->dirty_rx % rxsize;
-		if (likely(priv->rx_skbuff[entry] == NULL)) {
-			struct sk_buff *skb;
-
-			skb = __skb_dequeue(&priv->rx_recycle);
-			if (skb == NULL)
-				skb = netdev_alloc_skb_ip_align(priv->dev,
-								bfsize);
-
-			if (unlikely(skb == NULL))
-				break;
-
-			priv->rx_skbuff[entry] = skb;
-			priv->rx_skbuff_dma[entry] =
-			    dma_map_single(priv->device, skb->data, bfsize,
-					   DMA_FROM_DEVICE);
-
-			(p + entry)->des2 = priv->rx_skbuff_dma[entry];
-			if (unlikely(priv->plat->has_gmac)) {
-				if (bfsize >= BUF_SIZE_8KiB)
-					(p + entry)->des3 =
-					    (p + entry)->des2 + BUF_SIZE_8KiB;
-			}
-			RX_DBG(KERN_INFO "\trefill entry #%d\n", entry);
-		}
-		wmb();
-		priv->hw->desc->set_rx_owner(p + entry);
-	}
-}
-
-static int stmmac_rx(struct stmmac_priv *priv, int limit)
-{
-	unsigned int rxsize = priv->dma_rx_size;
-	unsigned int entry = priv->cur_rx % rxsize;
-	unsigned int next_entry;
-	unsigned int count = 0;
-	struct dma_desc *p = priv->dma_rx + entry;
-	struct dma_desc *p_next;
-
-#ifdef STMMAC_RX_DEBUG
-	if (netif_msg_hw(priv)) {
-		pr_debug(">>> stmmac_rx: descriptor ring:\n");
-		display_ring(priv->dma_rx, rxsize);
-	}
-#endif
-	count = 0;
-	while (!priv->hw->desc->get_rx_owner(p)) {
-		int status;
-
-		if (count >= limit)
-			break;
-
-		count++;
-
-		next_entry = (++priv->cur_rx) % rxsize;
-		p_next = priv->dma_rx + next_entry;
-		prefetch(p_next);
-
-		/* read the status of the incoming frame */
-		status = (priv->hw->desc->rx_status(&priv->dev->stats,
-						    &priv->xstats, p));
-		if (unlikely(status == discard_frame))
-			priv->dev->stats.rx_errors++;
-		else {
-			struct sk_buff *skb;
-			int frame_len;
-
-			frame_len = priv->hw->desc->get_rx_frame_len(p);
-			/* ACS is set; GMAC core strips PAD/FCS for IEEE 802.3
-			 * Type frames (LLC/LLC-SNAP) */
-			if (unlikely(status != llc_snap))
-				frame_len -= ETH_FCS_LEN;
-#ifdef STMMAC_RX_DEBUG
-			if (frame_len > ETH_FRAME_LEN)
-				pr_debug("\tRX frame size %d, COE status: %d\n",
-					frame_len, status);
-
-			if (netif_msg_hw(priv))
-				pr_debug("\tdesc: %p [entry %d] buff=0x%x\n",
-					p, entry, p->des2);
-#endif
-			skb = priv->rx_skbuff[entry];
-			if (unlikely(!skb)) {
-				pr_err("%s: Inconsistent Rx descriptor chain\n",
-					priv->dev->name);
-				priv->dev->stats.rx_dropped++;
-				break;
-			}
-			prefetch(skb->data - NET_IP_ALIGN);
-			priv->rx_skbuff[entry] = NULL;
-
-			skb_put(skb, frame_len);
-			dma_unmap_single(priv->device,
-					 priv->rx_skbuff_dma[entry],
-					 priv->dma_buf_sz, DMA_FROM_DEVICE);
-#ifdef STMMAC_RX_DEBUG
-			if (netif_msg_pktdata(priv)) {
-				pr_info(" frame received (%dbytes)", frame_len);
-				print_pkt(skb->data, frame_len);
-			}
-#endif
-			skb->protocol = eth_type_trans(skb, priv->dev);
-
-			if (unlikely(status == csum_none)) {
-				/* always for the old mac 10/100 */
-				skb_checksum_none_assert(skb);
-				netif_receive_skb(skb);
-			} else {
-				skb->ip_summed = CHECKSUM_UNNECESSARY;
-				napi_gro_receive(&priv->napi, skb);
-			}
-
-			priv->dev->stats.rx_packets++;
-			priv->dev->stats.rx_bytes += frame_len;
-		}
-		entry = next_entry;
-		p = p_next;	/* use prefetched values */
-	}
-
-	stmmac_rx_refill(priv);
-
-	priv->xstats.rx_pkt_n += count;
-
-	return count;
-}
-
-/**
- *  stmmac_poll - stmmac poll method (NAPI)
- *  @napi : pointer to the napi structure.
- *  @budget : maximum number of packets that the current CPU can receive from
- *	      all interfaces.
- *  Description :
- *   This function implements the the reception process.
- *   Also it runs the TX completion thread
- */
-static int stmmac_poll(struct napi_struct *napi, int budget)
-{
-	struct stmmac_priv *priv = container_of(napi, struct stmmac_priv, napi);
-	int work_done = 0;
-
-	priv->xstats.poll_n++;
-	stmmac_tx(priv);
-	work_done = stmmac_rx(priv, budget);
-
-	if (work_done < budget) {
-		napi_complete(napi);
-		stmmac_enable_irq(priv);
-	}
-	return work_done;
-}
-
-/**
- *  stmmac_tx_timeout
- *  @dev : Pointer to net device structure
- *  Description: this function is called when a packet transmission fails to
- *   complete within a reasonable tmrate. The driver will mark the error in the
- *   netdev structure and arrange for the device to be reset to a sane state
- *   in order to transmit a new packet.
- */
-static void stmmac_tx_timeout(struct net_device *dev)
-{
-	struct stmmac_priv *priv = netdev_priv(dev);
-
-	/* Clear Tx resources and restart transmitting again */
-	stmmac_tx_err(priv);
-}
-
-/* Configuration changes (passed on by ifconfig) */
-static int stmmac_config(struct net_device *dev, struct ifmap *map)
-{
-	if (dev->flags & IFF_UP)	/* can't act on a running interface */
-		return -EBUSY;
-
-	/* Don't allow changing the I/O address */
-	if (map->base_addr != dev->base_addr) {
-		pr_warning("%s: can't change I/O address\n", dev->name);
-		return -EOPNOTSUPP;
-	}
-
-	/* Don't allow changing the IRQ */
-	if (map->irq != dev->irq) {
-		pr_warning("%s: can't change IRQ number %d\n",
-		       dev->name, dev->irq);
-		return -EOPNOTSUPP;
-	}
-
-	/* ignore other fields */
-	return 0;
-}
-
-/**
- *  stmmac_multicast_list - entry point for multicast addressing
- *  @dev : pointer to the device structure
- *  Description:
- *  This function is a driver entry point which gets called by the kernel
- *  whenever multicast addresses must be enabled/disabled.
- *  Return value:
- *  void.
- */
-static void stmmac_multicast_list(struct net_device *dev)
-{
-	struct stmmac_priv *priv = netdev_priv(dev);
-
-	spin_lock(&priv->lock);
-	priv->hw->mac->set_filter(dev);
-	spin_unlock(&priv->lock);
-}
-
-/**
- *  stmmac_change_mtu - entry point to change MTU size for the device.
- *  @dev : device pointer.
- *  @new_mtu : the new MTU size for the device.
- *  Description: the Maximum Transfer Unit (MTU) is used by the network layer
- *  to drive packet transmission. Ethernet has an MTU of 1500 octets
- *  (ETH_DATA_LEN). This value can be changed with ifconfig.
- *  Return value:
- *  0 on success and an appropriate (-)ve integer as defined in errno.h
- *  file on failure.
- */
-static int stmmac_change_mtu(struct net_device *dev, int new_mtu)
-{
-	struct stmmac_priv *priv = netdev_priv(dev);
-	int max_mtu;
-
-	if (netif_running(dev)) {
-		pr_err("%s: must be stopped to change its MTU\n", dev->name);
-		return -EBUSY;
-	}
-
-	if (priv->plat->has_gmac)
-		max_mtu = JUMBO_LEN;
-	else
-		max_mtu = ETH_DATA_LEN;
-
-	if ((new_mtu < 46) || (new_mtu > max_mtu)) {
-		pr_err("%s: invalid MTU, max MTU is: %d\n", dev->name, max_mtu);
-		return -EINVAL;
-	}
-
-	dev->mtu = new_mtu;
-	netdev_update_features(dev);
-
-	return 0;
-}
-
-static u32 stmmac_fix_features(struct net_device *dev, u32 features)
-{
-	struct stmmac_priv *priv = netdev_priv(dev);
-
-	if (!priv->rx_coe)
-		features &= ~NETIF_F_RXCSUM;
-	if (!priv->plat->tx_coe)
-		features &= ~NETIF_F_ALL_CSUM;
-
-	/* Some GMAC devices have a bugged Jumbo frame support that
-	 * needs to have the Tx COE disabled for oversized frames
-	 * (due to limited buffer sizes). In this case we disable
-	 * the TX csum insertionin the TDES and not use SF. */
-	if (priv->plat->bugged_jumbo && (dev->mtu > ETH_DATA_LEN))
-		features &= ~NETIF_F_ALL_CSUM;
-
-	return features;
-}
-
-static irqreturn_t stmmac_interrupt(int irq, void *dev_id)
-{
-	struct net_device *dev = (struct net_device *)dev_id;
-	struct stmmac_priv *priv = netdev_priv(dev);
-
-	if (unlikely(!dev)) {
-		pr_err("%s: invalid dev pointer\n", __func__);
-		return IRQ_NONE;
-	}
-
-	if (priv->plat->has_gmac)
-		/* To handle GMAC own interrupts */
-		priv->hw->mac->host_irq_status((void __iomem *) dev->base_addr);
-
-	stmmac_dma_interrupt(priv);
-
-	return IRQ_HANDLED;
-}
-
-#ifdef CONFIG_NET_POLL_CONTROLLER
-/* Polling receive - used by NETCONSOLE and other diagnostic tools
- * to allow network I/O with interrupts disabled. */
-static void stmmac_poll_controller(struct net_device *dev)
-{
-	disable_irq(dev->irq);
-	stmmac_interrupt(dev->irq, dev);
-	enable_irq(dev->irq);
-}
-#endif
-
-/**
- *  stmmac_ioctl - Entry point for the Ioctl
- *  @dev: Device pointer.
- *  @rq: An IOCTL specefic structure, that can contain a pointer to
- *  a proprietary structure used to pass information to the driver.
- *  @cmd: IOCTL command
- *  Description:
- *  Currently there are no special functionality supported in IOCTL, just the
- *  phy_mii_ioctl(...) can be invoked.
- */
-static int stmmac_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
-{
-	struct stmmac_priv *priv = netdev_priv(dev);
-	int ret;
-
-	if (!netif_running(dev))
-		return -EINVAL;
-
-	if (!priv->phydev)
-		return -EINVAL;
-
-	spin_lock(&priv->lock);
-	ret = phy_mii_ioctl(priv->phydev, rq, cmd);
-	spin_unlock(&priv->lock);
-
-	return ret;
-}
-
-static const struct net_device_ops stmmac_netdev_ops = {
-	.ndo_open = stmmac_open,
-	.ndo_start_xmit = stmmac_xmit,
-	.ndo_stop = stmmac_release,
-	.ndo_change_mtu = stmmac_change_mtu,
-	.ndo_fix_features = stmmac_fix_features,
-	.ndo_set_multicast_list = stmmac_multicast_list,
-	.ndo_tx_timeout = stmmac_tx_timeout,
-	.ndo_do_ioctl = stmmac_ioctl,
-	.ndo_set_config = stmmac_config,
-#ifdef CONFIG_NET_POLL_CONTROLLER
-	.ndo_poll_controller = stmmac_poll_controller,
-#endif
-	.ndo_set_mac_address = eth_mac_addr,
-};
-
-/**
- * stmmac_probe - Initialization of the adapter .
- * @dev : device pointer
- * Description: The function initializes the network device structure for
- * the STMMAC driver. It also calls the low level routines
- * in order to init the HW (i.e. the DMA engine)
- */
-static int stmmac_probe(struct net_device *dev)
-{
-	int ret = 0;
-	struct stmmac_priv *priv = netdev_priv(dev);
-
-	ether_setup(dev);
-
-	dev->netdev_ops = &stmmac_netdev_ops;
-	stmmac_set_ethtool_ops(dev);
-
-	dev->hw_features = NETIF_F_SG | NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM;
-	dev->features |= dev->hw_features | NETIF_F_HIGHDMA;
-	dev->watchdog_timeo = msecs_to_jiffies(watchdog);
-#ifdef STMMAC_VLAN_TAG_USED
-	/* Both mac100 and gmac support receive VLAN tag detection */
-	dev->features |= NETIF_F_HW_VLAN_RX;
-#endif
-	priv->msg_enable = netif_msg_init(debug, default_msg_level);
-
-	if (flow_ctrl)
-		priv->flow_ctrl = FLOW_AUTO;	/* RX/TX pause on */
-
-	priv->pause = pause;
-	netif_napi_add(dev, &priv->napi, stmmac_poll, 64);
-
-	/* Get the MAC address */
-	priv->hw->mac->get_umac_addr((void __iomem *) dev->base_addr,
-				     dev->dev_addr, 0);
-
-	if (!is_valid_ether_addr(dev->dev_addr))
-		pr_warning("\tno valid MAC address;"
-			"please, use ifconfig or nwhwconfig!\n");
-
-	spin_lock_init(&priv->lock);
-
-	ret = register_netdev(dev);
-	if (ret) {
-		pr_err("%s: ERROR %i registering the device\n",
-		       __func__, ret);
-		return -ENODEV;
-	}
-
-	DBG(probe, DEBUG, "%s: Scatter/Gather: %s - HW checksums: %s\n",
-	    dev->name, (dev->features & NETIF_F_SG) ? "on" : "off",
-	    (dev->features & NETIF_F_IP_CSUM) ? "on" : "off");
-
-	return ret;
-}
-
-/**
- * stmmac_mac_device_setup
- * @dev : device pointer
- * Description: select and initialise the mac device (mac100 or Gmac).
- */
-static int stmmac_mac_device_setup(struct net_device *dev)
-{
-	struct stmmac_priv *priv = netdev_priv(dev);
-
-	struct mac_device_info *device;
-
-	if (priv->plat->has_gmac)
-		device = dwmac1000_setup(priv->ioaddr);
-	else
-		device = dwmac100_setup(priv->ioaddr);
-
-	if (!device)
-		return -ENOMEM;
-
-	if (priv->plat->enh_desc) {
-		device->desc = &enh_desc_ops;
-		pr_info("\tEnhanced descriptor structure\n");
-	} else
-		device->desc = &ndesc_ops;
-
-	priv->hw = device;
-
-	if (device_can_wakeup(priv->device)) {
-		priv->wolopts = WAKE_MAGIC; /* Magic Frame as default */
-		enable_irq_wake(dev->irq);
-	}
-
-	return 0;
-}
-
-/**
- * stmmac_dvr_probe
- * @pdev: platform device pointer
- * Description: the driver is initialized through platform_device.
- */
-static int stmmac_dvr_probe(struct platform_device *pdev)
-{
-	int ret = 0;
-	struct resource *res;
-	void __iomem *addr = NULL;
-	struct net_device *ndev = NULL;
-	struct stmmac_priv *priv = NULL;
-	struct plat_stmmacenet_data *plat_dat;
-
-	pr_info("STMMAC driver:\n\tplatform registration... ");
-	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-	if (!res)
-		return -ENODEV;
-	pr_info("\tdone!\n");
-
-	if (!request_mem_region(res->start, resource_size(res),
-				pdev->name)) {
-		pr_err("%s: ERROR: memory allocation failed"
-		       "cannot get the I/O addr 0x%x\n",
-		       __func__, (unsigned int)res->start);
-		return -EBUSY;
-	}
-
-	addr = ioremap(res->start, resource_size(res));
-	if (!addr) {
-		pr_err("%s: ERROR: memory mapping failed\n", __func__);
-		ret = -ENOMEM;
-		goto out_release_region;
-	}
-
-	ndev = alloc_etherdev(sizeof(struct stmmac_priv));
-	if (!ndev) {
-		pr_err("%s: ERROR: allocating the device\n", __func__);
-		ret = -ENOMEM;
-		goto out_unmap;
-	}
-
-	SET_NETDEV_DEV(ndev, &pdev->dev);
-
-	/* Get the MAC information */
-	ndev->irq = platform_get_irq_byname(pdev, "macirq");
-	if (ndev->irq == -ENXIO) {
-		pr_err("%s: ERROR: MAC IRQ configuration "
-		       "information not found\n", __func__);
-		ret = -ENXIO;
-		goto out_free_ndev;
-	}
-
-	priv = netdev_priv(ndev);
-	priv->device = &(pdev->dev);
-	priv->dev = ndev;
-	plat_dat = pdev->dev.platform_data;
-
-	priv->plat = plat_dat;
-
-	priv->ioaddr = addr;
-
-	/* PMT module is not integrated in all the MAC devices. */
-	if (plat_dat->pmt) {
-		pr_info("\tPMT module supported\n");
-		device_set_wakeup_capable(&pdev->dev, 1);
-	}
-
-	platform_set_drvdata(pdev, ndev);
-
-	/* Set the I/O base addr */
-	ndev->base_addr = (unsigned long)addr;
-
-	/* Custom initialisation */
-	if (priv->plat->init) {
-		ret = priv->plat->init(pdev);
-		if (unlikely(ret))
-			goto out_free_ndev;
-	}
-
-	/* MAC HW revice detection */
-	ret = stmmac_mac_device_setup(ndev);
-	if (ret < 0)
-		goto out_plat_exit;
-
-	/* Network Device Registration */
-	ret = stmmac_probe(ndev);
-	if (ret < 0)
-		goto out_plat_exit;
-
-	/* Override with kernel parameters if supplied XXX CRS XXX
-	 * this needs to have multiple instances */
-	if ((phyaddr >= 0) && (phyaddr <= 31))
-		priv->plat->phy_addr = phyaddr;
-
-	pr_info("\t%s - (dev. name: %s - id: %d, IRQ #%d\n"
-	       "\tIO base addr: 0x%p)\n", ndev->name, pdev->name,
-	       pdev->id, ndev->irq, addr);
-
-	/* MDIO bus Registration */
-	pr_debug("\tMDIO bus (id: %d)...", priv->plat->bus_id);
-	ret = stmmac_mdio_register(ndev);
-	if (ret < 0)
-		goto out_unregister;
-	pr_debug("registered!\n");
-	return 0;
-
-out_unregister:
-	unregister_netdev(ndev);
-out_plat_exit:
-	if (priv->plat->exit)
-		priv->plat->exit(pdev);
-out_free_ndev:
-	free_netdev(ndev);
-	platform_set_drvdata(pdev, NULL);
-out_unmap:
-	iounmap(addr);
-out_release_region:
-	release_mem_region(res->start, resource_size(res));
-
-	return ret;
-}
-
-/**
- * stmmac_dvr_remove
- * @pdev: platform device pointer
- * Description: this function resets the TX/RX processes, disables the MAC RX/TX
- * changes the link status, releases the DMA descriptor rings,
- * unregisters the MDIO bus and unmaps the allocated memory.
- */
-static int stmmac_dvr_remove(struct platform_device *pdev)
-{
-	struct net_device *ndev = platform_get_drvdata(pdev);
-	struct stmmac_priv *priv = netdev_priv(ndev);
-	struct resource *res;
-
-	pr_info("%s:\n\tremoving driver", __func__);
-
-	priv->hw->dma->stop_rx(priv->ioaddr);
-	priv->hw->dma->stop_tx(priv->ioaddr);
-
-	stmmac_disable_mac(priv->ioaddr);
-
-	netif_carrier_off(ndev);
-
-	stmmac_mdio_unregister(ndev);
-
-	if (priv->plat->exit)
-		priv->plat->exit(pdev);
-
-	platform_set_drvdata(pdev, NULL);
-	unregister_netdev(ndev);
-
-	iounmap((void *)priv->ioaddr);
-	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-	release_mem_region(res->start, resource_size(res));
-
-	free_netdev(ndev);
-
-	return 0;
-}
-
-#ifdef CONFIG_PM
-static int stmmac_suspend(struct device *dev)
-{
-	struct net_device *ndev = dev_get_drvdata(dev);
-	struct stmmac_priv *priv = netdev_priv(ndev);
-	int dis_ic = 0;
-
-	if (!ndev || !netif_running(ndev))
-		return 0;
-
-	spin_lock(&priv->lock);
-
-	netif_device_detach(ndev);
-	netif_stop_queue(ndev);
-	if (priv->phydev)
-		phy_stop(priv->phydev);
-
-#ifdef CONFIG_STMMAC_TIMER
-	priv->tm->timer_stop();
-	if (likely(priv->tm->enable))
-		dis_ic = 1;
-#endif
-	napi_disable(&priv->napi);
-
-	/* Stop TX/RX DMA */
-	priv->hw->dma->stop_tx(priv->ioaddr);
-	priv->hw->dma->stop_rx(priv->ioaddr);
-	/* Clear the Rx/Tx descriptors */
-	priv->hw->desc->init_rx_desc(priv->dma_rx, priv->dma_rx_size,
-				     dis_ic);
-	priv->hw->desc->init_tx_desc(priv->dma_tx, priv->dma_tx_size);
-
-	/* Enable Power down mode by programming the PMT regs */
-	if (device_may_wakeup(priv->device))
-		priv->hw->mac->pmt(priv->ioaddr, priv->wolopts);
-	else
-		stmmac_disable_mac(priv->ioaddr);
-
-	spin_unlock(&priv->lock);
-	return 0;
-}
-
-static int stmmac_resume(struct device *dev)
-{
-	struct net_device *ndev = dev_get_drvdata(dev);
-	struct stmmac_priv *priv = netdev_priv(ndev);
-
-	if (!netif_running(ndev))
-		return 0;
-
-	spin_lock(&priv->lock);
-
-	/* Power Down bit, into the PM register, is cleared
-	 * automatically as soon as a magic packet or a Wake-up frame
-	 * is received. Anyway, it's better to manually clear
-	 * this bit because it can generate problems while resuming
-	 * from another devices (e.g. serial console). */
-	if (device_may_wakeup(priv->device))
-		priv->hw->mac->pmt(priv->ioaddr, 0);
-
-	netif_device_attach(ndev);
-
-	/* Enable the MAC and DMA */
-	stmmac_enable_mac(priv->ioaddr);
-	priv->hw->dma->start_tx(priv->ioaddr);
-	priv->hw->dma->start_rx(priv->ioaddr);
-
-#ifdef CONFIG_STMMAC_TIMER
-	if (likely(priv->tm->enable))
-		priv->tm->timer_start(tmrate);
-#endif
-	napi_enable(&priv->napi);
-
-	if (priv->phydev)
-		phy_start(priv->phydev);
-
-	netif_start_queue(ndev);
-
-	spin_unlock(&priv->lock);
-	return 0;
-}
-
-static int stmmac_freeze(struct device *dev)
-{
-	struct net_device *ndev = dev_get_drvdata(dev);
-
-	if (!ndev || !netif_running(ndev))
-		return 0;
-
-	return stmmac_release(ndev);
-}
-
-static int stmmac_restore(struct device *dev)
-{
-	struct net_device *ndev = dev_get_drvdata(dev);
-
-	if (!ndev || !netif_running(ndev))
-		return 0;
-
-	return stmmac_open(ndev);
-}
-
-static const struct dev_pm_ops stmmac_pm_ops = {
-	.suspend = stmmac_suspend,
-	.resume = stmmac_resume,
-	.freeze = stmmac_freeze,
-	.thaw = stmmac_restore,
-	.restore = stmmac_restore,
-};
-#else
-static const struct dev_pm_ops stmmac_pm_ops;
-#endif /* CONFIG_PM */
-
-static struct platform_driver stmmac_driver = {
-	.probe = stmmac_dvr_probe,
-	.remove = stmmac_dvr_remove,
-	.driver = {
-		.name = STMMAC_RESOURCE_NAME,
-		.owner = THIS_MODULE,
-		.pm = &stmmac_pm_ops,
-	},
-};
-
-/**
- * stmmac_init_module - Entry point for the driver
- * Description: This function is the entry point for the driver.
- */
-static int __init stmmac_init_module(void)
-{
-	int ret;
-
-	ret = platform_driver_register(&stmmac_driver);
-	return ret;
-}
-
-/**
- * stmmac_cleanup_module - Cleanup routine for the driver
- * Description: This function is the cleanup routine for the driver.
- */
-static void __exit stmmac_cleanup_module(void)
-{
-	platform_driver_unregister(&stmmac_driver);
-}
-
-#ifndef MODULE
-static int __init stmmac_cmdline_opt(char *str)
-{
-	char *opt;
-
-	if (!str || !*str)
-		return -EINVAL;
-	while ((opt = strsep(&str, ",")) != NULL) {
-		if (!strncmp(opt, "debug:", 6)) {
-			if (strict_strtoul(opt + 6, 0, (unsigned long *)&debug))
-				goto err;
-		} else if (!strncmp(opt, "phyaddr:", 8)) {
-			if (strict_strtoul(opt + 8, 0,
-					   (unsigned long *)&phyaddr))
-				goto err;
-		} else if (!strncmp(opt, "dma_txsize:", 11)) {
-			if (strict_strtoul(opt + 11, 0,
-					   (unsigned long *)&dma_txsize))
-				goto err;
-		} else if (!strncmp(opt, "dma_rxsize:", 11)) {
-			if (strict_strtoul(opt + 11, 0,
-					   (unsigned long *)&dma_rxsize))
-				goto err;
-		} else if (!strncmp(opt, "buf_sz:", 7)) {
-			if (strict_strtoul(opt + 7, 0,
-					   (unsigned long *)&buf_sz))
-				goto err;
-		} else if (!strncmp(opt, "tc:", 3)) {
-			if (strict_strtoul(opt + 3, 0, (unsigned long *)&tc))
-				goto err;
-		} else if (!strncmp(opt, "watchdog:", 9)) {
-			if (strict_strtoul(opt + 9, 0,
-					   (unsigned long *)&watchdog))
-				goto err;
-		} else if (!strncmp(opt, "flow_ctrl:", 10)) {
-			if (strict_strtoul(opt + 10, 0,
-					   (unsigned long *)&flow_ctrl))
-				goto err;
-		} else if (!strncmp(opt, "pause:", 6)) {
-			if (strict_strtoul(opt + 6, 0, (unsigned long *)&pause))
-				goto err;
-#ifdef CONFIG_STMMAC_TIMER
-		} else if (!strncmp(opt, "tmrate:", 7)) {
-			if (strict_strtoul(opt + 7, 0,
-					   (unsigned long *)&tmrate))
-				goto err;
-#endif
-		}
-	}
-	return 0;
-
-err:
-	pr_err("%s: ERROR broken module parameter conversion", __func__);
-	return -EINVAL;
-}
-
-__setup("stmmaceth=", stmmac_cmdline_opt);
-#endif
-
-module_init(stmmac_init_module);
-module_exit(stmmac_cleanup_module);
-
-MODULE_DESCRIPTION("STMMAC 10/100/1000 Ethernet driver");
-MODULE_AUTHOR("Giuseppe Cavallaro <peppe.cavallaro@st.com>");
-MODULE_LICENSE("GPL");