--- /dev/null
+/*
+ * Driver for BCM963xx builtin Ethernet mac
+ *
+ * Copyright (C) 2008 Maxime Bizon <mbizon@freebox.fr>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/clk.h>
+#include <linux/etherdevice.h>
+#include <linux/delay.h>
+#include <linux/ethtool.h>
+#include <linux/crc32.h>
+#include <linux/err.h>
+#include <linux/dma-mapping.h>
+#include <linux/platform_device.h>
+#include <linux/if_vlan.h>
+
+#include <bcm63xx_dev_enet.h>
+#include "bcm63xx_enet.h"
+
+static char bcm_enet_driver_name[] = "bcm63xx_enet";
+static char bcm_enet_driver_version[] = "1.0";
+
+static int copybreak __read_mostly = 128;
+module_param(copybreak, int, 0);
+MODULE_PARM_DESC(copybreak, "Receive copy threshold");
+
+/* io memory shared between all devices */
+static void __iomem *bcm_enet_shared_base;
+
+/*
+ * io helpers to access mac registers
+ */
+static inline u32 enet_readl(struct bcm_enet_priv *priv, u32 off)
+{
+ return bcm_readl(priv->base + off);
+}
+
+static inline void enet_writel(struct bcm_enet_priv *priv,
+ u32 val, u32 off)
+{
+ bcm_writel(val, priv->base + off);
+}
+
+/*
+ * io helpers to access shared registers
+ */
+static inline u32 enet_dma_readl(struct bcm_enet_priv *priv, u32 off)
+{
+ return bcm_readl(bcm_enet_shared_base + off);
+}
+
+static inline void enet_dma_writel(struct bcm_enet_priv *priv,
+ u32 val, u32 off)
+{
+ bcm_writel(val, bcm_enet_shared_base + off);
+}
+
+/*
+ * write given data into mii register and wait for transfer to end
+ * with timeout (average measured transfer time is 25us)
+ */
+static int do_mdio_op(struct bcm_enet_priv *priv, unsigned int data)
+{
+ int limit;
+
+ /* make sure mii interrupt status is cleared */
+ enet_writel(priv, ENET_IR_MII, ENET_IR_REG);
+
+ enet_writel(priv, data, ENET_MIIDATA_REG);
+ wmb();
+
+ /* busy wait on mii interrupt bit, with timeout */
+ limit = 1000;
+ do {
+ if (enet_readl(priv, ENET_IR_REG) & ENET_IR_MII)
+ break;
+ udelay(1);
+ } while (limit-- >= 0);
+
+ return (limit < 0) ? 1 : 0;
+}
+
+/*
+ * MII internal read callback
+ */
+static int bcm_enet_mdio_read(struct bcm_enet_priv *priv, int mii_id,
+ int regnum)
+{
+ u32 tmp, val;
+
+ tmp = regnum << ENET_MIIDATA_REG_SHIFT;
+ tmp |= 0x2 << ENET_MIIDATA_TA_SHIFT;
+ tmp |= mii_id << ENET_MIIDATA_PHYID_SHIFT;
+ tmp |= ENET_MIIDATA_OP_READ_MASK;
+
+ if (do_mdio_op(priv, tmp))
+ return -1;
+
+ val = enet_readl(priv, ENET_MIIDATA_REG);
+ val &= 0xffff;
+ return val;
+}
+
+/*
+ * MII internal write callback
+ */
+static int bcm_enet_mdio_write(struct bcm_enet_priv *priv, int mii_id,
+ int regnum, u16 value)
+{
+ u32 tmp;
+
+ tmp = (value & 0xffff) << ENET_MIIDATA_DATA_SHIFT;
+ tmp |= 0x2 << ENET_MIIDATA_TA_SHIFT;
+ tmp |= regnum << ENET_MIIDATA_REG_SHIFT;
+ tmp |= mii_id << ENET_MIIDATA_PHYID_SHIFT;
+ tmp |= ENET_MIIDATA_OP_WRITE_MASK;
+
+ (void)do_mdio_op(priv, tmp);
+ return 0;
+}
+
+/*
+ * MII read callback from phylib
+ */
+static int bcm_enet_mdio_read_phylib(struct mii_bus *bus, int mii_id,
+ int regnum)
+{
+ return bcm_enet_mdio_read(bus->priv, mii_id, regnum);
+}
+
+/*
+ * MII write callback from phylib
+ */
+static int bcm_enet_mdio_write_phylib(struct mii_bus *bus, int mii_id,
+ int regnum, u16 value)
+{
+ return bcm_enet_mdio_write(bus->priv, mii_id, regnum, value);
+}
+
+/*
+ * MII read callback from mii core
+ */
+static int bcm_enet_mdio_read_mii(struct net_device *dev, int mii_id,
+ int regnum)
+{
+ return bcm_enet_mdio_read(netdev_priv(dev), mii_id, regnum);
+}
+
+/*
+ * MII write callback from mii core
+ */
+static void bcm_enet_mdio_write_mii(struct net_device *dev, int mii_id,
+ int regnum, int value)
+{
+ bcm_enet_mdio_write(netdev_priv(dev), mii_id, regnum, value);
+}
+
+/*
+ * refill rx queue
+ */
+static int bcm_enet_refill_rx(struct net_device *dev)
+{
+ struct bcm_enet_priv *priv;
+
+ priv = netdev_priv(dev);
+
+ while (priv->rx_desc_count < priv->rx_ring_size) {
+ struct bcm_enet_desc *desc;
+ struct sk_buff *skb;
+ dma_addr_t p;
+ int desc_idx;
+ u32 len_stat;
+
+ desc_idx = priv->rx_dirty_desc;
+ desc = &priv->rx_desc_cpu[desc_idx];
+
+ if (!priv->rx_skb[desc_idx]) {
+ skb = netdev_alloc_skb(dev, priv->rx_skb_size);
+ if (!skb)
+ break;
+ priv->rx_skb[desc_idx] = skb;
+
+ p = dma_map_single(&priv->pdev->dev, skb->data,
+ priv->rx_skb_size,
+ DMA_FROM_DEVICE);
+ desc->address = p;
+ }
+
+ len_stat = priv->rx_skb_size << DMADESC_LENGTH_SHIFT;
+ len_stat |= DMADESC_OWNER_MASK;
+ if (priv->rx_dirty_desc == priv->rx_ring_size - 1) {
+ len_stat |= DMADESC_WRAP_MASK;
+ priv->rx_dirty_desc = 0;
+ } else {
+ priv->rx_dirty_desc++;
+ }
+ wmb();
+ desc->len_stat = len_stat;
+
+ priv->rx_desc_count++;
+
+ /* tell dma engine we allocated one buffer */
+ enet_dma_writel(priv, 1, ENETDMA_BUFALLOC_REG(priv->rx_chan));
+ }
+
+ /* If rx ring is still empty, set a timer to try allocating
+ * again at a later time. */
+ if (priv->rx_desc_count == 0 && netif_running(dev)) {
+ dev_warn(&priv->pdev->dev, "unable to refill rx ring\n");
+ priv->rx_timeout.expires = jiffies + HZ;
+ add_timer(&priv->rx_timeout);
+ }
+
+ return 0;
+}
+
+/*
+ * timer callback to defer refill rx queue in case we're OOM
+ */
+static void bcm_enet_refill_rx_timer(unsigned long data)
+{
+ struct net_device *dev;
+ struct bcm_enet_priv *priv;
+
+ dev = (struct net_device *)data;
+ priv = netdev_priv(dev);
+
+ spin_lock(&priv->rx_lock);
+ bcm_enet_refill_rx((struct net_device *)data);
+ spin_unlock(&priv->rx_lock);
+}
+
+/*
+ * extract packet from rx queue
+ */
+static int bcm_enet_receive_queue(struct net_device *dev, int budget)
+{
+ struct bcm_enet_priv *priv;
+ struct device *kdev;
+ int processed;
+
+ priv = netdev_priv(dev);
+ kdev = &priv->pdev->dev;
+ processed = 0;
+
+ /* don't scan ring further than number of refilled
+ * descriptor */
+ if (budget > priv->rx_desc_count)
+ budget = priv->rx_desc_count;
+
+ do {
+ struct bcm_enet_desc *desc;
+ struct sk_buff *skb;
+ int desc_idx;
+ u32 len_stat;
+ unsigned int len;
+
+ desc_idx = priv->rx_curr_desc;
+ desc = &priv->rx_desc_cpu[desc_idx];
+
+ /* make sure we actually read the descriptor status at
+ * each loop */
+ rmb();
+
+ len_stat = desc->len_stat;
+
+ /* break if dma ownership belongs to hw */
+ if (len_stat & DMADESC_OWNER_MASK)
+ break;
+
+ processed++;
+ priv->rx_curr_desc++;
+ if (priv->rx_curr_desc == priv->rx_ring_size)
+ priv->rx_curr_desc = 0;
+ priv->rx_desc_count--;
+
+ /* if the packet does not have start of packet _and_
+ * end of packet flag set, then just recycle it */
+ if ((len_stat & DMADESC_ESOP_MASK) != DMADESC_ESOP_MASK) {
+ priv->stats.rx_dropped++;
+ continue;
+ }
+
+ /* recycle packet if it's marked as bad */
+ if (unlikely(len_stat & DMADESC_ERR_MASK)) {
+ priv->stats.rx_errors++;
+
+ if (len_stat & DMADESC_OVSIZE_MASK)
+ priv->stats.rx_length_errors++;
+ if (len_stat & DMADESC_CRC_MASK)
+ priv->stats.rx_crc_errors++;
+ if (len_stat & DMADESC_UNDER_MASK)
+ priv->stats.rx_frame_errors++;
+ if (len_stat & DMADESC_OV_MASK)
+ priv->stats.rx_fifo_errors++;
+ continue;
+ }
+
+ /* valid packet */
+ skb = priv->rx_skb[desc_idx];
+ len = (len_stat & DMADESC_LENGTH_MASK) >> DMADESC_LENGTH_SHIFT;
+ /* don't include FCS */
+ len -= 4;
+
+ if (len < copybreak) {
+ struct sk_buff *nskb;
+
+ nskb = netdev_alloc_skb(dev, len + NET_IP_ALIGN);
+ if (!nskb) {
+ /* forget packet, just rearm desc */
+ priv->stats.rx_dropped++;
+ continue;
+ }
+
+ /* since we're copying the data, we can align
+ * them properly */
+ skb_reserve(nskb, NET_IP_ALIGN);
+ dma_sync_single_for_cpu(kdev, desc->address,
+ len, DMA_FROM_DEVICE);
+ memcpy(nskb->data, skb->data, len);
+ dma_sync_single_for_device(kdev, desc->address,
+ len, DMA_FROM_DEVICE);
+ skb = nskb;
+ } else {
+ dma_unmap_single(&priv->pdev->dev, desc->address,
+ priv->rx_skb_size, DMA_FROM_DEVICE);
+ priv->rx_skb[desc_idx] = NULL;
+ }
+
+ skb_put(skb, len);
+ skb->dev = dev;
+ skb->protocol = eth_type_trans(skb, dev);
+ priv->stats.rx_packets++;
+ priv->stats.rx_bytes += len;
+ dev->last_rx = jiffies;
+ netif_receive_skb(skb);
+
+ } while (--budget > 0);
+
+ if (processed || !priv->rx_desc_count) {
+ bcm_enet_refill_rx(dev);
+
+ /* kick rx dma */
+ enet_dma_writel(priv, ENETDMA_CHANCFG_EN_MASK,
+ ENETDMA_CHANCFG_REG(priv->rx_chan));
+ }
+
+ return processed;
+}
+
+
+/*
+ * try to or force reclaim of transmitted buffers
+ */
+static int bcm_enet_tx_reclaim(struct net_device *dev, int force)
+{
+ struct bcm_enet_priv *priv;
+ int released;
+
+ priv = netdev_priv(dev);
+ released = 0;
+
+ while (priv->tx_desc_count < priv->tx_ring_size) {
+ struct bcm_enet_desc *desc;
+ struct sk_buff *skb;
+
+ /* We run in a bh and fight against start_xmit, which
+ * is called with bh disabled */
+ spin_lock(&priv->tx_lock);
+
+ desc = &priv->tx_desc_cpu[priv->tx_dirty_desc];
+
+ if (!force && (desc->len_stat & DMADESC_OWNER_MASK)) {
+ spin_unlock(&priv->tx_lock);
+ break;
+ }
+
+ /* ensure other field of the descriptor were not read
+ * before we checked ownership */
+ rmb();
+
+ skb = priv->tx_skb[priv->tx_dirty_desc];
+ priv->tx_skb[priv->tx_dirty_desc] = NULL;
+ dma_unmap_single(&priv->pdev->dev, desc->address, skb->len,
+ DMA_TO_DEVICE);
+
+ priv->tx_dirty_desc++;
+ if (priv->tx_dirty_desc == priv->tx_ring_size)
+ priv->tx_dirty_desc = 0;
+ priv->tx_desc_count++;
+
+ spin_unlock(&priv->tx_lock);
+
+ if (desc->len_stat & DMADESC_UNDER_MASK)
+ priv->stats.tx_errors++;
+
+ dev_kfree_skb(skb);
+ released++;
+ }
+
+ if (netif_queue_stopped(dev) && released)
+ netif_wake_queue(dev);
+
+ return released;
+}
+
+/*
+ * poll func, called by network core
+ */
+static int bcm_enet_poll(struct napi_struct *napi, int budget)
+{
+ struct bcm_enet_priv *priv;
+ struct net_device *dev;
+ int tx_work_done, rx_work_done;
+
+ priv = container_of(napi, struct bcm_enet_priv, napi);
+ dev = priv->net_dev;
+
+ /* ack interrupts */
+ enet_dma_writel(priv, ENETDMA_IR_PKTDONE_MASK,
+ ENETDMA_IR_REG(priv->rx_chan));
+ enet_dma_writel(priv, ENETDMA_IR_PKTDONE_MASK,
+ ENETDMA_IR_REG(priv->tx_chan));
+
+ /* reclaim sent skb */
+ tx_work_done = bcm_enet_tx_reclaim(dev, 0);
+
+ spin_lock(&priv->rx_lock);
+ rx_work_done = bcm_enet_receive_queue(dev, budget);
+ spin_unlock(&priv->rx_lock);
+
+ if (rx_work_done >= budget || tx_work_done > 0) {
+ /* rx/tx queue is not yet empty/clean */
+ return rx_work_done;
+ }
+
+ /* no more packet in rx/tx queue, remove device from poll
+ * queue */
+ napi_complete(napi);
+
+ /* restore rx/tx interrupt */
+ enet_dma_writel(priv, ENETDMA_IR_PKTDONE_MASK,
+ ENETDMA_IRMASK_REG(priv->rx_chan));
+ enet_dma_writel(priv, ENETDMA_IR_PKTDONE_MASK,
+ ENETDMA_IRMASK_REG(priv->tx_chan));
+
+ return rx_work_done;
+}
+
+/*
+ * mac interrupt handler
+ */
+static irqreturn_t bcm_enet_isr_mac(int irq, void *dev_id)
+{
+ struct net_device *dev;
+ struct bcm_enet_priv *priv;
+ u32 stat;
+
+ dev = dev_id;
+ priv = netdev_priv(dev);
+
+ stat = enet_readl(priv, ENET_IR_REG);
+ if (!(stat & ENET_IR_MIB))
+ return IRQ_NONE;
+
+ /* clear & mask interrupt */
+ enet_writel(priv, ENET_IR_MIB, ENET_IR_REG);
+ enet_writel(priv, 0, ENET_IRMASK_REG);
+
+ /* read mib registers in workqueue */
+ schedule_work(&priv->mib_update_task);
+
+ return IRQ_HANDLED;
+}
+
+/*
+ * rx/tx dma interrupt handler
+ */
+static irqreturn_t bcm_enet_isr_dma(int irq, void *dev_id)
+{
+ struct net_device *dev;
+ struct bcm_enet_priv *priv;
+
+ dev = dev_id;
+ priv = netdev_priv(dev);
+
+ /* mask rx/tx interrupts */
+ enet_dma_writel(priv, 0, ENETDMA_IRMASK_REG(priv->rx_chan));
+ enet_dma_writel(priv, 0, ENETDMA_IRMASK_REG(priv->tx_chan));
+
+ napi_schedule(&priv->napi);
+
+ return IRQ_HANDLED;
+}
+
+/*
+ * tx request callback
+ */
+static int bcm_enet_start_xmit(struct sk_buff *skb, struct net_device *dev)
+{
+ struct bcm_enet_priv *priv;
+ struct bcm_enet_desc *desc;
+ u32 len_stat;
+ int ret;
+
+ priv = netdev_priv(dev);
+
+ /* lock against tx reclaim */
+ spin_lock(&priv->tx_lock);
+
+ /* make sure the tx hw queue is not full, should not happen
+ * since we stop queue before it's the case */
+ if (unlikely(!priv->tx_desc_count)) {
+ netif_stop_queue(dev);
+ dev_err(&priv->pdev->dev, "xmit called with no tx desc "
+ "available?\n");
+ ret = NETDEV_TX_BUSY;
+ goto out_unlock;
+ }
+
+ /* point to the next available desc */
+ desc = &priv->tx_desc_cpu[priv->tx_curr_desc];
+ priv->tx_skb[priv->tx_curr_desc] = skb;
+
+ /* fill descriptor */
+ desc->address = dma_map_single(&priv->pdev->dev, skb->data, skb->len,
+ DMA_TO_DEVICE);
+
+ len_stat = (skb->len << DMADESC_LENGTH_SHIFT) & DMADESC_LENGTH_MASK;
+ len_stat |= DMADESC_ESOP_MASK |
+ DMADESC_APPEND_CRC |
+ DMADESC_OWNER_MASK;
+
+ priv->tx_curr_desc++;
+ if (priv->tx_curr_desc == priv->tx_ring_size) {
+ priv->tx_curr_desc = 0;
+ len_stat |= DMADESC_WRAP_MASK;
+ }
+ priv->tx_desc_count--;
+
+ /* dma might be already polling, make sure we update desc
+ * fields in correct order */
+ wmb();
+ desc->len_stat = len_stat;
+ wmb();
+
+ /* kick tx dma */
+ enet_dma_writel(priv, ENETDMA_CHANCFG_EN_MASK,
+ ENETDMA_CHANCFG_REG(priv->tx_chan));
+
+ /* stop queue if no more desc available */
+ if (!priv->tx_desc_count)
+ netif_stop_queue(dev);
+
+ priv->stats.tx_bytes += skb->len;
+ priv->stats.tx_packets++;
+ dev->trans_start = jiffies;
+ ret = NETDEV_TX_OK;
+
+out_unlock:
+ spin_unlock(&priv->tx_lock);
+ return ret;
+}
+
+/*
+ * Change the interface's mac address.
+ */
+static int bcm_enet_set_mac_address(struct net_device *dev, void *p)
+{
+ struct bcm_enet_priv *priv;
+ struct sockaddr *addr = p;
+ u32 val;
+
+ priv = netdev_priv(dev);
+ memcpy(dev->dev_addr, addr->sa_data, ETH_ALEN);
+
+ /* use perfect match register 0 to store my mac address */
+ val = (dev->dev_addr[2] << 24) | (dev->dev_addr[3] << 16) |
+ (dev->dev_addr[4] << 8) | dev->dev_addr[5];
+ enet_writel(priv, val, ENET_PML_REG(0));
+
+ val = (dev->dev_addr[0] << 8 | dev->dev_addr[1]);
+ val |= ENET_PMH_DATAVALID_MASK;
+ enet_writel(priv, val, ENET_PMH_REG(0));
+
+ return 0;
+}
+
+/*
+ * Change rx mode (promiscous/allmulti) and update multicast list
+ */
+static void bcm_enet_set_multicast_list(struct net_device *dev)
+{
+ struct bcm_enet_priv *priv;
+ struct dev_mc_list *mc_list;
+ u32 val;
+ int i;
+
+ priv = netdev_priv(dev);
+
+ val = enet_readl(priv, ENET_RXCFG_REG);
+
+ if (dev->flags & IFF_PROMISC)
+ val |= ENET_RXCFG_PROMISC_MASK;
+ else
+ val &= ~ENET_RXCFG_PROMISC_MASK;
+
+ /* only 3 perfect match registers left, first one is used for
+ * own mac address */
+ if ((dev->flags & IFF_ALLMULTI) || dev->mc_count > 3)
+ val |= ENET_RXCFG_ALLMCAST_MASK;
+ else
+ val &= ~ENET_RXCFG_ALLMCAST_MASK;
+
+ /* no need to set perfect match registers if we catch all
+ * multicast */
+ if (val & ENET_RXCFG_ALLMCAST_MASK) {
+ enet_writel(priv, val, ENET_RXCFG_REG);
+ return;
+ }
+
+ for (i = 0, mc_list = dev->mc_list;
+ (mc_list != NULL) && (i < dev->mc_count) && (i < 3);
+ i++, mc_list = mc_list->next) {
+ u8 *dmi_addr;
+ u32 tmp;
+
+ /* filter non ethernet address */
+ if (mc_list->dmi_addrlen != 6)
+ continue;
+
+ /* update perfect match registers */
+ dmi_addr = mc_list->dmi_addr;
+ tmp = (dmi_addr[2] << 24) | (dmi_addr[3] << 16) |
+ (dmi_addr[4] << 8) | dmi_addr[5];
+ enet_writel(priv, tmp, ENET_PML_REG(i + 1));
+
+ tmp = (dmi_addr[0] << 8 | dmi_addr[1]);
+ tmp |= ENET_PMH_DATAVALID_MASK;
+ enet_writel(priv, tmp, ENET_PMH_REG(i + 1));
+ }
+
+ for (; i < 3; i++) {
+ enet_writel(priv, 0, ENET_PML_REG(i + 1));
+ enet_writel(priv, 0, ENET_PMH_REG(i + 1));
+ }
+
+ enet_writel(priv, val, ENET_RXCFG_REG);
+}
+
+/*
+ * set mac duplex parameters
+ */
+static void bcm_enet_set_duplex(struct bcm_enet_priv *priv, int fullduplex)
+{
+ u32 val;
+
+ val = enet_readl(priv, ENET_TXCTL_REG);
+ if (fullduplex)
+ val |= ENET_TXCTL_FD_MASK;
+ else
+ val &= ~ENET_TXCTL_FD_MASK;
+ enet_writel(priv, val, ENET_TXCTL_REG);
+}
+
+/*
+ * set mac flow control parameters
+ */
+static void bcm_enet_set_flow(struct bcm_enet_priv *priv, int rx_en, int tx_en)
+{
+ u32 val;
+
+ /* rx flow control (pause frame handling) */
+ val = enet_readl(priv, ENET_RXCFG_REG);
+ if (rx_en)
+ val |= ENET_RXCFG_ENFLOW_MASK;
+ else
+ val &= ~ENET_RXCFG_ENFLOW_MASK;
+ enet_writel(priv, val, ENET_RXCFG_REG);
+
+ /* tx flow control (pause frame generation) */
+ val = enet_dma_readl(priv, ENETDMA_CFG_REG);
+ if (tx_en)
+ val |= ENETDMA_CFG_FLOWCH_MASK(priv->rx_chan);
+ else
+ val &= ~ENETDMA_CFG_FLOWCH_MASK(priv->rx_chan);
+ enet_dma_writel(priv, val, ENETDMA_CFG_REG);
+}
+
+/*
+ * link changed callback (from phylib)
+ */
+static void bcm_enet_adjust_phy_link(struct net_device *dev)
+{
+ struct bcm_enet_priv *priv;
+ struct phy_device *phydev;
+ int status_changed;
+
+ priv = netdev_priv(dev);
+ phydev = priv->phydev;
+ status_changed = 0;
+
+ if (priv->old_link != phydev->link) {
+ status_changed = 1;
+ priv->old_link = phydev->link;
+ }
+
+ /* reflect duplex change in mac configuration */
+ if (phydev->link && phydev->duplex != priv->old_duplex) {
+ bcm_enet_set_duplex(priv,
+ (phydev->duplex == DUPLEX_FULL) ? 1 : 0);
+ status_changed = 1;
+ priv->old_duplex = phydev->duplex;
+ }
+
+ /* enable flow control if remote advertise it (trust phylib to
+ * check that duplex is full */
+ if (phydev->link && phydev->pause != priv->old_pause) {
+ int rx_pause_en, tx_pause_en;
+
+ if (phydev->pause) {
+ /* pause was advertised by lpa and us */
+ rx_pause_en = 1;
+ tx_pause_en = 1;
+ } else if (!priv->pause_auto) {
+ /* pause setting overrided by user */
+ rx_pause_en = priv->pause_rx;
+ tx_pause_en = priv->pause_tx;
+ } else {
+ rx_pause_en = 0;
+ tx_pause_en = 0;
+ }
+
+ bcm_enet_set_flow(priv, rx_pause_en, tx_pause_en);
+ status_changed = 1;
+ priv->old_pause = phydev->pause;
+ }
+
+ if (status_changed) {
+ pr_info("%s: link %s", dev->name, phydev->link ?
+ "UP" : "DOWN");
+ if (phydev->link)
+ pr_cont(" - %d/%s - flow control %s", phydev->speed,
+ DUPLEX_FULL == phydev->duplex ? "full" : "half",
+ phydev->pause == 1 ? "rx&tx" : "off");
+
+ pr_cont("\n");
+ }
+}
+
+/*
+ * link changed callback (if phylib is not used)
+ */
+static void bcm_enet_adjust_link(struct net_device *dev)
+{
+ struct bcm_enet_priv *priv;
+
+ priv = netdev_priv(dev);
+ bcm_enet_set_duplex(priv, priv->force_duplex_full);
+ bcm_enet_set_flow(priv, priv->pause_rx, priv->pause_tx);
+ netif_carrier_on(dev);
+
+ pr_info("%s: link forced UP - %d/%s - flow control %s/%s\n",
+ dev->name,
+ priv->force_speed_100 ? 100 : 10,
+ priv->force_duplex_full ? "full" : "half",
+ priv->pause_rx ? "rx" : "off",
+ priv->pause_tx ? "tx" : "off");
+}
+
+/*
+ * open callback, allocate dma rings & buffers and start rx operation
+ */
+static int bcm_enet_open(struct net_device *dev)
+{
+ struct bcm_enet_priv *priv;
+ struct sockaddr addr;
+ struct device *kdev;
+ struct phy_device *phydev;
+ int i, ret;
+ unsigned int size;
+ char phy_id[MII_BUS_ID_SIZE + 3];
+ void *p;
+ u32 val;
+
+ priv = netdev_priv(dev);
+ kdev = &priv->pdev->dev;
+
+ if (priv->has_phy) {
+ /* connect to PHY */
+ snprintf(phy_id, sizeof(phy_id), PHY_ID_FMT,
+ priv->mac_id ? "1" : "0", priv->phy_id);
+
+ phydev = phy_connect(dev, phy_id, &bcm_enet_adjust_phy_link, 0,
+ PHY_INTERFACE_MODE_MII);
+
+ if (IS_ERR(phydev)) {
+ dev_err(kdev, "could not attach to PHY\n");
+ return PTR_ERR(phydev);
+ }
+
+ /* mask with MAC supported features */
+ phydev->supported &= (SUPPORTED_10baseT_Half |
+ SUPPORTED_10baseT_Full |
+ SUPPORTED_100baseT_Half |
+ SUPPORTED_100baseT_Full |
+ SUPPORTED_Autoneg |
+ SUPPORTED_Pause |
+ SUPPORTED_MII);
+ phydev->advertising = phydev->supported;
+
+ if (priv->pause_auto && priv->pause_rx && priv->pause_tx)
+ phydev->advertising |= SUPPORTED_Pause;
+ else
+ phydev->advertising &= ~SUPPORTED_Pause;
+
+ dev_info(kdev, "attached PHY at address %d [%s]\n",
+ phydev->addr, phydev->drv->name);
+
+ priv->old_link = 0;
+ priv->old_duplex = -1;
+ priv->old_pause = -1;
+ priv->phydev = phydev;
+ }
+
+ /* mask all interrupts and request them */
+ enet_writel(priv, 0, ENET_IRMASK_REG);
+ enet_dma_writel(priv, 0, ENETDMA_IRMASK_REG(priv->rx_chan));
+ enet_dma_writel(priv, 0, ENETDMA_IRMASK_REG(priv->tx_chan));
+
+ ret = request_irq(dev->irq, bcm_enet_isr_mac, 0, dev->name, dev);
+ if (ret)
+ goto out_phy_disconnect;
+
+ ret = request_irq(priv->irq_rx, bcm_enet_isr_dma,
+ IRQF_SAMPLE_RANDOM | IRQF_DISABLED, dev->name, dev);
+ if (ret)
+ goto out_freeirq;
+
+ ret = request_irq(priv->irq_tx, bcm_enet_isr_dma,
+ IRQF_DISABLED, dev->name, dev);
+ if (ret)
+ goto out_freeirq_rx;
+
+ /* initialize perfect match registers */
+ for (i = 0; i < 4; i++) {
+ enet_writel(priv, 0, ENET_PML_REG(i));
+ enet_writel(priv, 0, ENET_PMH_REG(i));
+ }
+
+ /* write device mac address */
+ memcpy(addr.sa_data, dev->dev_addr, ETH_ALEN);
+ bcm_enet_set_mac_address(dev, &addr);
+
+ /* allocate rx dma ring */
+ size = priv->rx_ring_size * sizeof(struct bcm_enet_desc);
+ p = dma_alloc_coherent(kdev, size, &priv->rx_desc_dma, GFP_KERNEL);
+ if (!p) {
+ dev_err(kdev, "cannot allocate rx ring %u\n", size);
+ ret = -ENOMEM;
+ goto out_freeirq_tx;
+ }
+
+ memset(p, 0, size);
+ priv->rx_desc_alloc_size = size;
+ priv->rx_desc_cpu = p;
+
+ /* allocate tx dma ring */
+ size = priv->tx_ring_size * sizeof(struct bcm_enet_desc);
+ p = dma_alloc_coherent(kdev, size, &priv->tx_desc_dma, GFP_KERNEL);
+ if (!p) {
+ dev_err(kdev, "cannot allocate tx ring\n");
+ ret = -ENOMEM;
+ goto out_free_rx_ring;
+ }
+
+ memset(p, 0, size);
+ priv->tx_desc_alloc_size = size;
+ priv->tx_desc_cpu = p;
+
+ priv->tx_skb = kzalloc(sizeof(struct sk_buff *) * priv->tx_ring_size,
+ GFP_KERNEL);
+ if (!priv->tx_skb) {
+ dev_err(kdev, "cannot allocate rx skb queue\n");
+ ret = -ENOMEM;
+ goto out_free_tx_ring;
+ }
+
+ priv->tx_desc_count = priv->tx_ring_size;
+ priv->tx_dirty_desc = 0;
+ priv->tx_curr_desc = 0;
+ spin_lock_init(&priv->tx_lock);
+
+ /* init & fill rx ring with skbs */
+ priv->rx_skb = kzalloc(sizeof(struct sk_buff *) * priv->rx_ring_size,
+ GFP_KERNEL);
+ if (!priv->rx_skb) {
+ dev_err(kdev, "cannot allocate rx skb queue\n");
+ ret = -ENOMEM;
+ goto out_free_tx_skb;
+ }
+
+ priv->rx_desc_count = 0;
+ priv->rx_dirty_desc = 0;
+ priv->rx_curr_desc = 0;
+
+ /* initialize flow control buffer allocation */
+ enet_dma_writel(priv, ENETDMA_BUFALLOC_FORCE_MASK | 0,
+ ENETDMA_BUFALLOC_REG(priv->rx_chan));
+
+ if (bcm_enet_refill_rx(dev)) {
+ dev_err(kdev, "cannot allocate rx skb queue\n");
+ ret = -ENOMEM;
+ goto out;
+ }
+
+ /* write rx & tx ring addresses */
+ enet_dma_writel(priv, priv->rx_desc_dma,
+ ENETDMA_RSTART_REG(priv->rx_chan));
+ enet_dma_writel(priv, priv->tx_desc_dma,
+ ENETDMA_RSTART_REG(priv->tx_chan));
+
+ /* clear remaining state ram for rx & tx channel */
+ enet_dma_writel(priv, 0, ENETDMA_SRAM2_REG(priv->rx_chan));
+ enet_dma_writel(priv, 0, ENETDMA_SRAM2_REG(priv->tx_chan));
+ enet_dma_writel(priv, 0, ENETDMA_SRAM3_REG(priv->rx_chan));
+ enet_dma_writel(priv, 0, ENETDMA_SRAM3_REG(priv->tx_chan));
+ enet_dma_writel(priv, 0, ENETDMA_SRAM4_REG(priv->rx_chan));
+ enet_dma_writel(priv, 0, ENETDMA_SRAM4_REG(priv->tx_chan));
+
+ /* set max rx/tx length */
+ enet_writel(priv, priv->hw_mtu, ENET_RXMAXLEN_REG);
+ enet_writel(priv, priv->hw_mtu, ENET_TXMAXLEN_REG);
+
+ /* set dma maximum burst len */
+ enet_dma_writel(priv, BCMENET_DMA_MAXBURST,
+ ENETDMA_MAXBURST_REG(priv->rx_chan));
+ enet_dma_writel(priv, BCMENET_DMA_MAXBURST,
+ ENETDMA_MAXBURST_REG(priv->tx_chan));
+
+ /* set correct transmit fifo watermark */
+ enet_writel(priv, BCMENET_TX_FIFO_TRESH, ENET_TXWMARK_REG);
+
+ /* set flow control low/high threshold to 1/3 / 2/3 */
+ val = priv->rx_ring_size / 3;
+ enet_dma_writel(priv, val, ENETDMA_FLOWCL_REG(priv->rx_chan));
+ val = (priv->rx_ring_size * 2) / 3;
+ enet_dma_writel(priv, val, ENETDMA_FLOWCH_REG(priv->rx_chan));
+
+ /* all set, enable mac and interrupts, start dma engine and
+ * kick rx dma channel */
+ wmb();
+ enet_writel(priv, ENET_CTL_ENABLE_MASK, ENET_CTL_REG);
+ enet_dma_writel(priv, ENETDMA_CFG_EN_MASK, ENETDMA_CFG_REG);
+ enet_dma_writel(priv, ENETDMA_CHANCFG_EN_MASK,
+ ENETDMA_CHANCFG_REG(priv->rx_chan));
+
+ /* watch "mib counters about to overflow" interrupt */
+ enet_writel(priv, ENET_IR_MIB, ENET_IR_REG);
+ enet_writel(priv, ENET_IR_MIB, ENET_IRMASK_REG);
+
+ /* watch "packet transferred" interrupt in rx and tx */
+ enet_dma_writel(priv, ENETDMA_IR_PKTDONE_MASK,
+ ENETDMA_IR_REG(priv->rx_chan));
+ enet_dma_writel(priv, ENETDMA_IR_PKTDONE_MASK,
+ ENETDMA_IR_REG(priv->tx_chan));
+
+ /* make sure we enable napi before rx interrupt */
+ napi_enable(&priv->napi);
+
+ enet_dma_writel(priv, ENETDMA_IR_PKTDONE_MASK,
+ ENETDMA_IRMASK_REG(priv->rx_chan));
+ enet_dma_writel(priv, ENETDMA_IR_PKTDONE_MASK,
+ ENETDMA_IRMASK_REG(priv->tx_chan));
+
+ if (priv->has_phy)
+ phy_start(priv->phydev);
+ else
+ bcm_enet_adjust_link(dev);
+
+ netif_start_queue(dev);
+ return 0;
+
+out:
+ for (i = 0; i < priv->rx_ring_size; i++) {
+ struct bcm_enet_desc *desc;
+
+ if (!priv->rx_skb[i])
+ continue;
+
+ desc = &priv->rx_desc_cpu[i];
+ dma_unmap_single(kdev, desc->address, priv->rx_skb_size,
+ DMA_FROM_DEVICE);
+ kfree_skb(priv->rx_skb[i]);
+ }
+ kfree(priv->rx_skb);
+
+out_free_tx_skb:
+ kfree(priv->tx_skb);
+
+out_free_tx_ring:
+ dma_free_coherent(kdev, priv->tx_desc_alloc_size,
+ priv->tx_desc_cpu, priv->tx_desc_dma);
+
+out_free_rx_ring:
+ dma_free_coherent(kdev, priv->rx_desc_alloc_size,
+ priv->rx_desc_cpu, priv->rx_desc_dma);
+
+out_freeirq_tx:
+ free_irq(priv->irq_tx, dev);
+
+out_freeirq_rx:
+ free_irq(priv->irq_rx, dev);
+
+out_freeirq:
+ free_irq(dev->irq, dev);
+
+out_phy_disconnect:
+ phy_disconnect(priv->phydev);
+
+ return ret;
+}
+
+/*
+ * disable mac
+ */
+static void bcm_enet_disable_mac(struct bcm_enet_priv *priv)
+{
+ int limit;
+ u32 val;
+
+ val = enet_readl(priv, ENET_CTL_REG);
+ val |= ENET_CTL_DISABLE_MASK;
+ enet_writel(priv, val, ENET_CTL_REG);
+
+ limit = 1000;
+ do {
+ u32 val;
+
+ val = enet_readl(priv, ENET_CTL_REG);
+ if (!(val & ENET_CTL_DISABLE_MASK))
+ break;
+ udelay(1);
+ } while (limit--);
+}
+
+/*
+ * disable dma in given channel
+ */
+static void bcm_enet_disable_dma(struct bcm_enet_priv *priv, int chan)
+{
+ int limit;
+
+ enet_dma_writel(priv, 0, ENETDMA_CHANCFG_REG(chan));
+
+ limit = 1000;
+ do {
+ u32 val;
+
+ val = enet_dma_readl(priv, ENETDMA_CHANCFG_REG(chan));
+ if (!(val & ENETDMA_CHANCFG_EN_MASK))
+ break;
+ udelay(1);
+ } while (limit--);
+}
+
+/*
+ * stop callback
+ */
+static int bcm_enet_stop(struct net_device *dev)
+{
+ struct bcm_enet_priv *priv;
+ struct device *kdev;
+ int i;
+
+ priv = netdev_priv(dev);
+ kdev = &priv->pdev->dev;
+
+ netif_stop_queue(dev);
+ napi_disable(&priv->napi);
+ if (priv->has_phy)
+ phy_stop(priv->phydev);
+ del_timer_sync(&priv->rx_timeout);
+
+ /* mask all interrupts */
+ enet_writel(priv, 0, ENET_IRMASK_REG);
+ enet_dma_writel(priv, 0, ENETDMA_IRMASK_REG(priv->rx_chan));
+ enet_dma_writel(priv, 0, ENETDMA_IRMASK_REG(priv->tx_chan));
+
+ /* make sure no mib update is scheduled */
+ flush_scheduled_work();
+
+ /* disable dma & mac */
+ bcm_enet_disable_dma(priv, priv->tx_chan);
+ bcm_enet_disable_dma(priv, priv->rx_chan);
+ bcm_enet_disable_mac(priv);
+
+ /* force reclaim of all tx buffers */
+ bcm_enet_tx_reclaim(dev, 1);
+
+ /* free the rx skb ring */
+ for (i = 0; i < priv->rx_ring_size; i++) {
+ struct bcm_enet_desc *desc;
+
+ if (!priv->rx_skb[i])
+ continue;
+
+ desc = &priv->rx_desc_cpu[i];
+ dma_unmap_single(kdev, desc->address, priv->rx_skb_size,
+ DMA_FROM_DEVICE);
+ kfree_skb(priv->rx_skb[i]);
+ }
+
+ /* free remaining allocated memory */
+ kfree(priv->rx_skb);
+ kfree(priv->tx_skb);
+ dma_free_coherent(kdev, priv->rx_desc_alloc_size,
+ priv->rx_desc_cpu, priv->rx_desc_dma);
+ dma_free_coherent(kdev, priv->tx_desc_alloc_size,
+ priv->tx_desc_cpu, priv->tx_desc_dma);
+ free_irq(priv->irq_tx, dev);
+ free_irq(priv->irq_rx, dev);
+ free_irq(dev->irq, dev);
+
+ /* release phy */
+ if (priv->has_phy) {
+ phy_disconnect(priv->phydev);
+ priv->phydev = NULL;
+ }
+
+ return 0;
+}
+
+/*
+ * core request to return device rx/tx stats
+ */
+static struct net_device_stats *bcm_enet_get_stats(struct net_device *dev)
+{
+ struct bcm_enet_priv *priv;
+
+ priv = netdev_priv(dev);
+ return &priv->stats;
+}
+
+/*
+ * ethtool callbacks
+ */
+struct bcm_enet_stats {
+ char stat_string[ETH_GSTRING_LEN];
+ int sizeof_stat;
+ int stat_offset;
+ int mib_reg;
+};
+
+#define GEN_STAT(m) sizeof(((struct bcm_enet_priv *)0)->m), \
+ offsetof(struct bcm_enet_priv, m)
+
+static const struct bcm_enet_stats bcm_enet_gstrings_stats[] = {
+ { "rx_packets", GEN_STAT(stats.rx_packets), -1 },
+ { "tx_packets", GEN_STAT(stats.tx_packets), -1 },
+ { "rx_bytes", GEN_STAT(stats.rx_bytes), -1 },
+ { "tx_bytes", GEN_STAT(stats.tx_bytes), -1 },
+ { "rx_errors", GEN_STAT(stats.rx_errors), -1 },
+ { "tx_errors", GEN_STAT(stats.tx_errors), -1 },
+ { "rx_dropped", GEN_STAT(stats.rx_dropped), -1 },
+ { "tx_dropped", GEN_STAT(stats.tx_dropped), -1 },
+
+ { "rx_good_octets", GEN_STAT(mib.rx_gd_octets), ETH_MIB_RX_GD_OCTETS},
+ { "rx_good_pkts", GEN_STAT(mib.rx_gd_pkts), ETH_MIB_RX_GD_PKTS },
+ { "rx_broadcast", GEN_STAT(mib.rx_brdcast), ETH_MIB_RX_BRDCAST },
+ { "rx_multicast", GEN_STAT(mib.rx_mult), ETH_MIB_RX_MULT },
+ { "rx_64_octets", GEN_STAT(mib.rx_64), ETH_MIB_RX_64 },
+ { "rx_65_127_oct", GEN_STAT(mib.rx_65_127), ETH_MIB_RX_65_127 },
+ { "rx_128_255_oct", GEN_STAT(mib.rx_128_255), ETH_MIB_RX_128_255 },
+ { "rx_256_511_oct", GEN_STAT(mib.rx_256_511), ETH_MIB_RX_256_511 },
+ { "rx_512_1023_oct", GEN_STAT(mib.rx_512_1023), ETH_MIB_RX_512_1023 },
+ { "rx_1024_max_oct", GEN_STAT(mib.rx_1024_max), ETH_MIB_RX_1024_MAX },
+ { "rx_jabber", GEN_STAT(mib.rx_jab), ETH_MIB_RX_JAB },
+ { "rx_oversize", GEN_STAT(mib.rx_ovr), ETH_MIB_RX_OVR },
+ { "rx_fragment", GEN_STAT(mib.rx_frag), ETH_MIB_RX_FRAG },
+ { "rx_dropped", GEN_STAT(mib.rx_drop), ETH_MIB_RX_DROP },
+ { "rx_crc_align", GEN_STAT(mib.rx_crc_align), ETH_MIB_RX_CRC_ALIGN },
+ { "rx_undersize", GEN_STAT(mib.rx_und), ETH_MIB_RX_UND },
+ { "rx_crc", GEN_STAT(mib.rx_crc), ETH_MIB_RX_CRC },
+ { "rx_align", GEN_STAT(mib.rx_align), ETH_MIB_RX_ALIGN },
+ { "rx_symbol_error", GEN_STAT(mib.rx_sym), ETH_MIB_RX_SYM },
+ { "rx_pause", GEN_STAT(mib.rx_pause), ETH_MIB_RX_PAUSE },
+ { "rx_control", GEN_STAT(mib.rx_cntrl), ETH_MIB_RX_CNTRL },
+
+ { "tx_good_octets", GEN_STAT(mib.tx_gd_octets), ETH_MIB_TX_GD_OCTETS },
+ { "tx_good_pkts", GEN_STAT(mib.tx_gd_pkts), ETH_MIB_TX_GD_PKTS },
+ { "tx_broadcast", GEN_STAT(mib.tx_brdcast), ETH_MIB_TX_BRDCAST },
+ { "tx_multicast", GEN_STAT(mib.tx_mult), ETH_MIB_TX_MULT },
+ { "tx_64_oct", GEN_STAT(mib.tx_64), ETH_MIB_TX_64 },
+ { "tx_65_127_oct", GEN_STAT(mib.tx_65_127), ETH_MIB_TX_65_127 },
+ { "tx_128_255_oct", GEN_STAT(mib.tx_128_255), ETH_MIB_TX_128_255 },
+ { "tx_256_511_oct", GEN_STAT(mib.tx_256_511), ETH_MIB_TX_256_511 },
+ { "tx_512_1023_oct", GEN_STAT(mib.tx_512_1023), ETH_MIB_TX_512_1023},
+ { "tx_1024_max_oct", GEN_STAT(mib.tx_1024_max), ETH_MIB_TX_1024_MAX },
+ { "tx_jabber", GEN_STAT(mib.tx_jab), ETH_MIB_TX_JAB },
+ { "tx_oversize", GEN_STAT(mib.tx_ovr), ETH_MIB_TX_OVR },
+ { "tx_fragment", GEN_STAT(mib.tx_frag), ETH_MIB_TX_FRAG },
+ { "tx_underrun", GEN_STAT(mib.tx_underrun), ETH_MIB_TX_UNDERRUN },
+ { "tx_collisions", GEN_STAT(mib.tx_col), ETH_MIB_TX_COL },
+ { "tx_single_collision", GEN_STAT(mib.tx_1_col), ETH_MIB_TX_1_COL },
+ { "tx_multiple_collision", GEN_STAT(mib.tx_m_col), ETH_MIB_TX_M_COL },
+ { "tx_excess_collision", GEN_STAT(mib.tx_ex_col), ETH_MIB_TX_EX_COL },
+ { "tx_late_collision", GEN_STAT(mib.tx_late), ETH_MIB_TX_LATE },
+ { "tx_deferred", GEN_STAT(mib.tx_def), ETH_MIB_TX_DEF },
+ { "tx_carrier_sense", GEN_STAT(mib.tx_crs), ETH_MIB_TX_CRS },
+ { "tx_pause", GEN_STAT(mib.tx_pause), ETH_MIB_TX_PAUSE },
+
+};
+
+#define BCM_ENET_STATS_LEN \
+ (sizeof(bcm_enet_gstrings_stats) / sizeof(struct bcm_enet_stats))
+
+static const u32 unused_mib_regs[] = {
+ ETH_MIB_TX_ALL_OCTETS,
+ ETH_MIB_TX_ALL_PKTS,
+ ETH_MIB_RX_ALL_OCTETS,
+ ETH_MIB_RX_ALL_PKTS,
+};
+
+
+static void bcm_enet_get_drvinfo(struct net_device *netdev,
+ struct ethtool_drvinfo *drvinfo)
+{
+ strncpy(drvinfo->driver, bcm_enet_driver_name, 32);
+ strncpy(drvinfo->version, bcm_enet_driver_version, 32);
+ strncpy(drvinfo->fw_version, "N/A", 32);
+ strncpy(drvinfo->bus_info, "bcm63xx", 32);
+ drvinfo->n_stats = BCM_ENET_STATS_LEN;
+}
+
+static int bcm_enet_get_stats_count(struct net_device *netdev)
+{
+ return BCM_ENET_STATS_LEN;
+}
+
+static void bcm_enet_get_strings(struct net_device *netdev,
+ u32 stringset, u8 *data)
+{
+ int i;
+
+ switch (stringset) {
+ case ETH_SS_STATS:
+ for (i = 0; i < BCM_ENET_STATS_LEN; i++) {
+ memcpy(data + i * ETH_GSTRING_LEN,
+ bcm_enet_gstrings_stats[i].stat_string,
+ ETH_GSTRING_LEN);
+ }
+ break;
+ }
+}
+
+static void update_mib_counters(struct bcm_enet_priv *priv)
+{
+ int i;
+
+ for (i = 0; i < BCM_ENET_STATS_LEN; i++) {
+ const struct bcm_enet_stats *s;
+ u32 val;
+ char *p;
+
+ s = &bcm_enet_gstrings_stats[i];
+ if (s->mib_reg == -1)
+ continue;
+
+ val = enet_readl(priv, ENET_MIB_REG(s->mib_reg));
+ p = (char *)priv + s->stat_offset;
+
+ if (s->sizeof_stat == sizeof(u64))
+ *(u64 *)p += val;
+ else
+ *(u32 *)p += val;
+ }
+
+ /* also empty unused mib counters to make sure mib counter
+ * overflow interrupt is cleared */
+ for (i = 0; i < ARRAY_SIZE(unused_mib_regs); i++)
+ (void)enet_readl(priv, ENET_MIB_REG(unused_mib_regs[i]));
+}
+
+static void bcm_enet_update_mib_counters_defer(struct work_struct *t)
+{
+ struct bcm_enet_priv *priv;
+
+ priv = container_of(t, struct bcm_enet_priv, mib_update_task);
+ mutex_lock(&priv->mib_update_lock);
+ update_mib_counters(priv);
+ mutex_unlock(&priv->mib_update_lock);
+
+ /* reenable mib interrupt */
+ if (netif_running(priv->net_dev))
+ enet_writel(priv, ENET_IR_MIB, ENET_IRMASK_REG);
+}
+
+static void bcm_enet_get_ethtool_stats(struct net_device *netdev,
+ struct ethtool_stats *stats,
+ u64 *data)
+{
+ struct bcm_enet_priv *priv;
+ int i;
+
+ priv = netdev_priv(netdev);
+
+ mutex_lock(&priv->mib_update_lock);
+ update_mib_counters(priv);
+
+ for (i = 0; i < BCM_ENET_STATS_LEN; i++) {
+ const struct bcm_enet_stats *s;
+ char *p;
+
+ s = &bcm_enet_gstrings_stats[i];
+ p = (char *)priv + s->stat_offset;
+ data[i] = (s->sizeof_stat == sizeof(u64)) ?
+ *(u64 *)p : *(u32 *)p;
+ }
+ mutex_unlock(&priv->mib_update_lock);
+}
+
+static int bcm_enet_get_settings(struct net_device *dev,
+ struct ethtool_cmd *cmd)
+{
+ struct bcm_enet_priv *priv;
+
+ priv = netdev_priv(dev);
+
+ cmd->maxrxpkt = 0;
+ cmd->maxtxpkt = 0;
+
+ if (priv->has_phy) {
+ if (!priv->phydev)
+ return -ENODEV;
+ return phy_ethtool_gset(priv->phydev, cmd);
+ } else {
+ cmd->autoneg = 0;
+ cmd->speed = (priv->force_speed_100) ? SPEED_100 : SPEED_10;
+ cmd->duplex = (priv->force_duplex_full) ?
+ DUPLEX_FULL : DUPLEX_HALF;
+ cmd->supported = ADVERTISED_10baseT_Half |
+ ADVERTISED_10baseT_Full |
+ ADVERTISED_100baseT_Half |
+ ADVERTISED_100baseT_Full;
+ cmd->advertising = 0;
+ cmd->port = PORT_MII;
+ cmd->transceiver = XCVR_EXTERNAL;
+ }
+ return 0;
+}
+
+static int bcm_enet_set_settings(struct net_device *dev,
+ struct ethtool_cmd *cmd)
+{
+ struct bcm_enet_priv *priv;
+
+ priv = netdev_priv(dev);
+ if (priv->has_phy) {
+ if (!priv->phydev)
+ return -ENODEV;
+ return phy_ethtool_sset(priv->phydev, cmd);
+ } else {
+
+ if (cmd->autoneg ||
+ (cmd->speed != SPEED_100 && cmd->speed != SPEED_10) ||
+ cmd->port != PORT_MII)
+ return -EINVAL;
+
+ priv->force_speed_100 = (cmd->speed == SPEED_100) ? 1 : 0;
+ priv->force_duplex_full = (cmd->duplex == DUPLEX_FULL) ? 1 : 0;
+
+ if (netif_running(dev))
+ bcm_enet_adjust_link(dev);
+ return 0;
+ }
+}
+
+static void bcm_enet_get_ringparam(struct net_device *dev,
+ struct ethtool_ringparam *ering)
+{
+ struct bcm_enet_priv *priv;
+
+ priv = netdev_priv(dev);
+
+ /* rx/tx ring is actually only limited by memory */
+ ering->rx_max_pending = 8192;
+ ering->tx_max_pending = 8192;
+ ering->rx_mini_max_pending = 0;
+ ering->rx_jumbo_max_pending = 0;
+ ering->rx_pending = priv->rx_ring_size;
+ ering->tx_pending = priv->tx_ring_size;
+}
+
+static int bcm_enet_set_ringparam(struct net_device *dev,
+ struct ethtool_ringparam *ering)
+{
+ struct bcm_enet_priv *priv;
+ int was_running;
+
+ priv = netdev_priv(dev);
+
+ was_running = 0;
+ if (netif_running(dev)) {
+ bcm_enet_stop(dev);
+ was_running = 1;
+ }
+
+ priv->rx_ring_size = ering->rx_pending;
+ priv->tx_ring_size = ering->tx_pending;
+
+ if (was_running) {
+ int err;
+
+ err = bcm_enet_open(dev);
+ if (err)
+ dev_close(dev);
+ else
+ bcm_enet_set_multicast_list(dev);
+ }
+ return 0;
+}
+
+static void bcm_enet_get_pauseparam(struct net_device *dev,
+ struct ethtool_pauseparam *ecmd)
+{
+ struct bcm_enet_priv *priv;
+
+ priv = netdev_priv(dev);
+ ecmd->autoneg = priv->pause_auto;
+ ecmd->rx_pause = priv->pause_rx;
+ ecmd->tx_pause = priv->pause_tx;
+}
+
+static int bcm_enet_set_pauseparam(struct net_device *dev,
+ struct ethtool_pauseparam *ecmd)
+{
+ struct bcm_enet_priv *priv;
+
+ priv = netdev_priv(dev);
+
+ if (priv->has_phy) {
+ if (ecmd->autoneg && (ecmd->rx_pause != ecmd->tx_pause)) {
+ /* asymetric pause mode not supported,
+ * actually possible but integrated PHY has RO
+ * asym_pause bit */
+ return -EINVAL;
+ }
+ } else {
+ /* no pause autoneg on direct mii connection */
+ if (ecmd->autoneg)
+ return -EINVAL;
+ }
+
+ priv->pause_auto = ecmd->autoneg;
+ priv->pause_rx = ecmd->rx_pause;
+ priv->pause_tx = ecmd->tx_pause;
+
+ return 0;
+}
+
+static struct ethtool_ops bcm_enet_ethtool_ops = {
+ .get_strings = bcm_enet_get_strings,
+ .get_stats_count = bcm_enet_get_stats_count,
+ .get_ethtool_stats = bcm_enet_get_ethtool_stats,
+ .get_settings = bcm_enet_get_settings,
+ .set_settings = bcm_enet_set_settings,
+ .get_drvinfo = bcm_enet_get_drvinfo,
+ .get_link = ethtool_op_get_link,
+ .get_ringparam = bcm_enet_get_ringparam,
+ .set_ringparam = bcm_enet_set_ringparam,
+ .get_pauseparam = bcm_enet_get_pauseparam,
+ .set_pauseparam = bcm_enet_set_pauseparam,
+};
+
+static int bcm_enet_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
+{
+ struct bcm_enet_priv *priv;
+
+ priv = netdev_priv(dev);
+ if (priv->has_phy) {
+ if (!priv->phydev)
+ return -ENODEV;
+ return phy_mii_ioctl(priv->phydev, if_mii(rq), cmd);
+ } else {
+ struct mii_if_info mii;
+
+ mii.dev = dev;
+ mii.mdio_read = bcm_enet_mdio_read_mii;
+ mii.mdio_write = bcm_enet_mdio_write_mii;
+ mii.phy_id = 0;
+ mii.phy_id_mask = 0x3f;
+ mii.reg_num_mask = 0x1f;
+ return generic_mii_ioctl(&mii, if_mii(rq), cmd, NULL);
+ }
+}
+
+/*
+ * calculate actual hardware mtu
+ */
+static int compute_hw_mtu(struct bcm_enet_priv *priv, int mtu)
+{
+ int actual_mtu;
+
+ actual_mtu = mtu;
+
+ /* add ethernet header + vlan tag size */
+ actual_mtu += VLAN_ETH_HLEN;
+
+ if (actual_mtu < 64 || actual_mtu > BCMENET_MAX_MTU)
+ return -EINVAL;
+
+ /*
+ * setup maximum size before we get overflow mark in
+ * descriptor, note that this will not prevent reception of
+ * big frames, they will be split into multiple buffers
+ * anyway
+ */
+ priv->hw_mtu = actual_mtu;
+
+ /*
+ * align rx buffer size to dma burst len, account FCS since
+ * it's appended
+ */
+ priv->rx_skb_size = ALIGN(actual_mtu + ETH_FCS_LEN,
+ BCMENET_DMA_MAXBURST * 4);
+ return 0;
+}
+
+/*
+ * adjust mtu, can't be called while device is running
+ */
+static int bcm_enet_change_mtu(struct net_device *dev, int new_mtu)
+{
+ int ret;
+
+ if (netif_running(dev))
+ return -EBUSY;
+
+ ret = compute_hw_mtu(netdev_priv(dev), new_mtu);
+ if (ret)
+ return ret;
+ dev->mtu = new_mtu;
+ return 0;
+}
+
+/*
+ * preinit hardware to allow mii operation while device is down
+ */
+static void bcm_enet_hw_preinit(struct bcm_enet_priv *priv)
+{
+ u32 val;
+ int limit;
+
+ /* make sure mac is disabled */
+ bcm_enet_disable_mac(priv);
+
+ /* soft reset mac */
+ val = ENET_CTL_SRESET_MASK;
+ enet_writel(priv, val, ENET_CTL_REG);
+ wmb();
+
+ limit = 1000;
+ do {
+ val = enet_readl(priv, ENET_CTL_REG);
+ if (!(val & ENET_CTL_SRESET_MASK))
+ break;
+ udelay(1);
+ } while (limit--);
+
+ /* select correct mii interface */
+ val = enet_readl(priv, ENET_CTL_REG);
+ if (priv->use_external_mii)
+ val |= ENET_CTL_EPHYSEL_MASK;
+ else
+ val &= ~ENET_CTL_EPHYSEL_MASK;
+ enet_writel(priv, val, ENET_CTL_REG);
+
+ /* turn on mdc clock */
+ enet_writel(priv, (0x1f << ENET_MIISC_MDCFREQDIV_SHIFT) |
+ ENET_MIISC_PREAMBLEEN_MASK, ENET_MIISC_REG);
+
+ /* set mib counters to self-clear when read */
+ val = enet_readl(priv, ENET_MIBCTL_REG);
+ val |= ENET_MIBCTL_RDCLEAR_MASK;
+ enet_writel(priv, val, ENET_MIBCTL_REG);
+}
+
+static const struct net_device_ops bcm_enet_ops = {
+ .ndo_open = bcm_enet_open,
+ .ndo_stop = bcm_enet_stop,
+ .ndo_start_xmit = bcm_enet_start_xmit,
+ .ndo_get_stats = bcm_enet_get_stats,
+ .ndo_set_mac_address = bcm_enet_set_mac_address,
+ .ndo_set_multicast_list = bcm_enet_set_multicast_list,
+ .ndo_do_ioctl = bcm_enet_ioctl,
+ .ndo_change_mtu = bcm_enet_change_mtu,
+#ifdef CONFIG_NET_POLL_CONTROLLER
+ .ndo_poll_controller = bcm_enet_netpoll,
+#endif
+};
+
+/*
+ * allocate netdevice, request register memory and register device.
+ */
+static int __devinit bcm_enet_probe(struct platform_device *pdev)
+{
+ struct bcm_enet_priv *priv;
+ struct net_device *dev;
+ struct bcm63xx_enet_platform_data *pd;
+ struct resource *res_mem, *res_irq, *res_irq_rx, *res_irq_tx;
+ struct mii_bus *bus;
+ const char *clk_name;
+ unsigned int iomem_size;
+ int i, ret;
+
+ /* stop if shared driver failed, assume driver->probe will be
+ * called in the same order we register devices (correct ?) */
+ if (!bcm_enet_shared_base)
+ return -ENODEV;
+
+ res_mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ res_irq = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
+ res_irq_rx = platform_get_resource(pdev, IORESOURCE_IRQ, 1);
+ res_irq_tx = platform_get_resource(pdev, IORESOURCE_IRQ, 2);
+ if (!res_mem || !res_irq || !res_irq_rx || !res_irq_tx)
+ return -ENODEV;
+
+ ret = 0;
+ dev = alloc_etherdev(sizeof(*priv));
+ if (!dev)
+ return -ENOMEM;
+ priv = netdev_priv(dev);
+ memset(priv, 0, sizeof(*priv));
+
+ ret = compute_hw_mtu(priv, dev->mtu);
+ if (ret)
+ goto out;
+
+ iomem_size = res_mem->end - res_mem->start + 1;
+ if (!request_mem_region(res_mem->start, iomem_size, "bcm63xx_enet")) {
+ ret = -EBUSY;
+ goto out;
+ }
+
+ priv->base = ioremap(res_mem->start, iomem_size);
+ if (priv->base == NULL) {
+ ret = -ENOMEM;
+ goto out_release_mem;
+ }
+ dev->irq = priv->irq = res_irq->start;
+ priv->irq_rx = res_irq_rx->start;
+ priv->irq_tx = res_irq_tx->start;
+ priv->mac_id = pdev->id;
+
+ /* get rx & tx dma channel id for this mac */
+ if (priv->mac_id == 0) {
+ priv->rx_chan = 0;
+ priv->tx_chan = 1;
+ clk_name = "enet0";
+ } else {
+ priv->rx_chan = 2;
+ priv->tx_chan = 3;
+ clk_name = "enet1";
+ }
+
+ priv->mac_clk = clk_get(&pdev->dev, clk_name);
+ if (IS_ERR(priv->mac_clk)) {
+ ret = PTR_ERR(priv->mac_clk);
+ goto out_unmap;
+ }
+ clk_enable(priv->mac_clk);
+
+ /* initialize default and fetch platform data */
+ priv->rx_ring_size = BCMENET_DEF_RX_DESC;
+ priv->tx_ring_size = BCMENET_DEF_TX_DESC;
+
+ pd = pdev->dev.platform_data;
+ if (pd) {
+ memcpy(dev->dev_addr, pd->mac_addr, ETH_ALEN);
+ priv->has_phy = pd->has_phy;
+ priv->phy_id = pd->phy_id;
+ priv->has_phy_interrupt = pd->has_phy_interrupt;
+ priv->phy_interrupt = pd->phy_interrupt;
+ priv->use_external_mii = !pd->use_internal_phy;
+ priv->pause_auto = pd->pause_auto;
+ priv->pause_rx = pd->pause_rx;
+ priv->pause_tx = pd->pause_tx;
+ priv->force_duplex_full = pd->force_duplex_full;
+ priv->force_speed_100 = pd->force_speed_100;
+ }
+
+ if (priv->mac_id == 0 && priv->has_phy && !priv->use_external_mii) {
+ /* using internal PHY, enable clock */
+ priv->phy_clk = clk_get(&pdev->dev, "ephy");
+ if (IS_ERR(priv->phy_clk)) {
+ ret = PTR_ERR(priv->phy_clk);
+ priv->phy_clk = NULL;
+ goto out_put_clk_mac;
+ }
+ clk_enable(priv->phy_clk);
+ }
+
+ /* do minimal hardware init to be able to probe mii bus */
+ bcm_enet_hw_preinit(priv);
+
+ /* MII bus registration */
+ if (priv->has_phy) {
+
+ priv->mii_bus = mdiobus_alloc();
+ if (!priv->mii_bus) {
+ ret = -ENOMEM;
+ goto out_uninit_hw;
+ }
+
+ bus = priv->mii_bus;
+ bus->name = "bcm63xx_enet MII bus";
+ bus->parent = &pdev->dev;
+ bus->priv = priv;
+ bus->read = bcm_enet_mdio_read_phylib;
+ bus->write = bcm_enet_mdio_write_phylib;
+ sprintf(bus->id, "%d", priv->mac_id);
+
+ /* only probe bus where we think the PHY is, because
+ * the mdio read operation return 0 instead of 0xffff
+ * if a slave is not present on hw */
+ bus->phy_mask = ~(1 << priv->phy_id);
+
+ bus->irq = kmalloc(sizeof(int) * PHY_MAX_ADDR, GFP_KERNEL);
+ if (!bus->irq) {
+ ret = -ENOMEM;
+ goto out_free_mdio;
+ }
+
+ if (priv->has_phy_interrupt)
+ bus->irq[priv->phy_id] = priv->phy_interrupt;
+ else
+ bus->irq[priv->phy_id] = PHY_POLL;
+
+ ret = mdiobus_register(bus);
+ if (ret) {
+ dev_err(&pdev->dev, "unable to register mdio bus\n");
+ goto out_free_mdio;
+ }
+ } else {
+
+ /* run platform code to initialize PHY device */
+ if (pd->mii_config &&
+ pd->mii_config(dev, 1, bcm_enet_mdio_read_mii,
+ bcm_enet_mdio_write_mii)) {
+ dev_err(&pdev->dev, "unable to configure mdio bus\n");
+ goto out_uninit_hw;
+ }
+ }
+
+ spin_lock_init(&priv->rx_lock);
+
+ /* init rx timeout (used for oom) */
+ init_timer(&priv->rx_timeout);
+ priv->rx_timeout.function = bcm_enet_refill_rx_timer;
+ priv->rx_timeout.data = (unsigned long)dev;
+
+ /* init the mib update lock&work */
+ mutex_init(&priv->mib_update_lock);
+ INIT_WORK(&priv->mib_update_task, bcm_enet_update_mib_counters_defer);
+
+ /* zero mib counters */
+ for (i = 0; i < ENET_MIB_REG_COUNT; i++)
+ enet_writel(priv, 0, ENET_MIB_REG(i));
+
+ /* register netdevice */
+ dev->netdev_ops = &bcm_enet_ops;
+ netif_napi_add(dev, &priv->napi, bcm_enet_poll, 16);
+
+ SET_ETHTOOL_OPS(dev, &bcm_enet_ethtool_ops);
+ SET_NETDEV_DEV(dev, &pdev->dev);
+
+ ret = register_netdev(dev);
+ if (ret)
+ goto out_unregister_mdio;
+
+ netif_carrier_off(dev);
+ platform_set_drvdata(pdev, dev);
+ priv->pdev = pdev;
+ priv->net_dev = dev;
+
+ return 0;
+
+out_unregister_mdio:
+ if (priv->mii_bus) {
+ mdiobus_unregister(priv->mii_bus);
+ kfree(priv->mii_bus->irq);
+ }
+
+out_free_mdio:
+ if (priv->mii_bus)
+ mdiobus_free(priv->mii_bus);
+
+out_uninit_hw:
+ /* turn off mdc clock */
+ enet_writel(priv, 0, ENET_MIISC_REG);
+ if (priv->phy_clk) {
+ clk_disable(priv->phy_clk);
+ clk_put(priv->phy_clk);
+ }
+
+out_put_clk_mac:
+ clk_disable(priv->mac_clk);
+ clk_put(priv->mac_clk);
+
+out_unmap:
+ iounmap(priv->base);
+
+out_release_mem:
+ release_mem_region(res_mem->start, iomem_size);
+out:
+ free_netdev(dev);
+ return ret;
+}
+
+
+/*
+ * exit func, stops hardware and unregisters netdevice
+ */
+static int __devexit bcm_enet_remove(struct platform_device *pdev)
+{
+ struct bcm_enet_priv *priv;
+ struct net_device *dev;
+ struct resource *res;
+
+ /* stop netdevice */
+ dev = platform_get_drvdata(pdev);
+ priv = netdev_priv(dev);
+ unregister_netdev(dev);
+
+ /* turn off mdc clock */
+ enet_writel(priv, 0, ENET_MIISC_REG);
+
+ if (priv->has_phy) {
+ mdiobus_unregister(priv->mii_bus);
+ kfree(priv->mii_bus->irq);
+ mdiobus_free(priv->mii_bus);
+ } else {
+ struct bcm63xx_enet_platform_data *pd;
+
+ pd = pdev->dev.platform_data;
+ if (pd && pd->mii_config)
+ pd->mii_config(dev, 0, bcm_enet_mdio_read_mii,
+ bcm_enet_mdio_write_mii);
+ }
+
+ /* release device resources */
+ iounmap(priv->base);
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ release_mem_region(res->start, res->end - res->start + 1);
+
+ /* disable hw block clocks */
+ if (priv->phy_clk) {
+ clk_disable(priv->phy_clk);
+ clk_put(priv->phy_clk);
+ }
+ clk_disable(priv->mac_clk);
+ clk_put(priv->mac_clk);
+
+ platform_set_drvdata(pdev, NULL);
+ free_netdev(dev);
+ return 0;
+}
+
+struct platform_driver bcm63xx_enet_driver = {
+ .probe = bcm_enet_probe,
+ .remove = __devexit_p(bcm_enet_remove),
+ .driver = {
+ .name = "bcm63xx_enet",
+ .owner = THIS_MODULE,
+ },
+};
+
+/*
+ * reserve & remap memory space shared between all macs
+ */
+static int __devinit bcm_enet_shared_probe(struct platform_device *pdev)
+{
+ struct resource *res;
+ unsigned int iomem_size;
+
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ if (!res)
+ return -ENODEV;
+
+ iomem_size = res->end - res->start + 1;
+ if (!request_mem_region(res->start, iomem_size, "bcm63xx_enet_dma"))
+ return -EBUSY;
+
+ bcm_enet_shared_base = ioremap(res->start, iomem_size);
+ if (!bcm_enet_shared_base) {
+ release_mem_region(res->start, iomem_size);
+ return -ENOMEM;
+ }
+ return 0;
+}
+
+static int __devexit bcm_enet_shared_remove(struct platform_device *pdev)
+{
+ struct resource *res;
+
+ iounmap(bcm_enet_shared_base);
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ release_mem_region(res->start, res->end - res->start + 1);
+ return 0;
+}
+
+/*
+ * this "shared" driver is needed because both macs share a single
+ * address space
+ */
+struct platform_driver bcm63xx_enet_shared_driver = {
+ .probe = bcm_enet_shared_probe,
+ .remove = __devexit_p(bcm_enet_shared_remove),
+ .driver = {
+ .name = "bcm63xx_enet_shared",
+ .owner = THIS_MODULE,
+ },
+};
+
+/*
+ * entry point
+ */
+static int __init bcm_enet_init(void)
+{
+ int ret;
+
+ ret = platform_driver_register(&bcm63xx_enet_shared_driver);
+ if (ret)
+ return ret;
+
+ ret = platform_driver_register(&bcm63xx_enet_driver);
+ if (ret)
+ platform_driver_unregister(&bcm63xx_enet_shared_driver);
+
+ return ret;
+}
+
+static void __exit bcm_enet_exit(void)
+{
+ platform_driver_unregister(&bcm63xx_enet_driver);
+ platform_driver_unregister(&bcm63xx_enet_shared_driver);
+}
+
+
+module_init(bcm_enet_init);
+module_exit(bcm_enet_exit);
+
+MODULE_DESCRIPTION("BCM63xx internal ethernet mac driver");
+MODULE_AUTHOR("Maxime Bizon <mbizon@freebox.fr>");
+MODULE_LICENSE("GPL");
projects / linux-beck.git / commitdiff