diff options
Diffstat (limited to 'target/linux/brcm63xx/files/drivers/net/bcm63xx_enet.c')
| -rw-r--r-- | target/linux/brcm63xx/files/drivers/net/bcm63xx_enet.c | 1964 |
1 files changed, 0 insertions, 1964 deletions
diff --git a/target/linux/brcm63xx/files/drivers/net/bcm63xx_enet.c b/target/linux/brcm63xx/files/drivers/net/bcm63xx_enet.c deleted file mode 100644 index d338bbc08..000000000 --- a/target/linux/brcm63xx/files/drivers/net/bcm63xx_enet.c +++ /dev/null @@ -1,1964 +0,0 @@ -/* - * 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 <linux/version.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 + 2); - 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 */ -#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,30) - netif_rx_complete(dev, napi); -#else - napi_complete(napi); -#endif - - /* 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)); - -#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,30) - netif_rx_schedule(dev, &priv->napi); -#else - napi_schedule(&priv->napi); -#endif - - 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) - printk(" - %d/%s - flow control %s", phydev->speed, - DUPLEX_FULL == phydev->duplex ? "full" : "half", - phydev->pause == 1 ? "rx&tx" : "off"); - - printk("\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); - - 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 irq_requested, i, ret; - unsigned int size; - char phy_id[BUS_ID_SIZE]; - void *p; - u32 val; - - priv = netdev_priv(dev); - priv->rx_desc_cpu = priv->tx_desc_cpu = NULL; - priv->rx_skb = priv->tx_skb = NULL; - - kdev = &priv->pdev->dev; - - if (priv->has_phy) { - /* connect to PHY */ - snprintf(phy_id, BUS_ID_SIZE, 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)); - - irq_requested = 0; - ret = request_irq(dev->irq, bcm_enet_isr_mac, 0, dev->name, dev); - if (ret) - goto out; - irq_requested++; - - ret = request_irq(priv->irq_rx, bcm_enet_isr_dma, - IRQF_SAMPLE_RANDOM | IRQF_DISABLED, dev->name, dev); - if (ret) - goto out; - irq_requested++; - - ret = request_irq(priv->irq_tx, bcm_enet_isr_dma, - IRQF_DISABLED, dev->name, dev); - if (ret) - goto out; - irq_requested++; - - /* 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; - } - - 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; - } - - 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; - } - - 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; - } - - 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: - phy_disconnect(priv->phydev); - if (irq_requested > 2) - free_irq(priv->irq_tx, dev); - if (irq_requested > 1) - free_irq(priv->irq_rx, dev); - if (irq_requested > 0) - free_irq(dev->irq, dev); - 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]); - } - if (priv->rx_desc_cpu) - dma_free_coherent(kdev, priv->rx_desc_alloc_size, - priv->rx_desc_cpu, priv->rx_desc_dma); - if (priv->tx_desc_cpu) - dma_free_coherent(kdev, priv->tx_desc_alloc_size, - priv->tx_desc_cpu, priv->tx_desc_dma); - kfree(priv->rx_skb); - kfree(priv->tx_skb); - 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); -} - -/* - * 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, mdio_registered, mem_requested; - - /* 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; - - mdio_registered = mem_requested = 0; - - 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 err; - } - mem_requested = 1; - - priv->base = ioremap(res_mem->start, iomem_size); - if (priv->base == NULL) { - ret = -ENOMEM; - goto err; - } - 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); - priv->mac_clk = NULL; - goto err; - } - 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 err; - } - 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) { - bus = &priv->mii_bus; - bus->name = "bcm63xx_enet MII bus"; -#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,28) - bus->dev = &pdev->dev; -#else - bus->parent = &pdev->dev; -#endif - 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 err; - } - - 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 err; - } - mdio_registered = 1; - } 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 err; - } - } - - 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->open = bcm_enet_open; - dev->stop = bcm_enet_stop; - dev->hard_start_xmit = bcm_enet_start_xmit; - dev->get_stats = bcm_enet_get_stats; - dev->set_mac_address = bcm_enet_set_mac_address; - dev->set_multicast_list = bcm_enet_set_multicast_list; - netif_napi_add(dev, &priv->napi, bcm_enet_poll, 16); - dev->do_ioctl = bcm_enet_ioctl; -#ifdef CONFIG_NET_POLL_CONTROLLER - dev->poll_controller = bcm_enet_netpoll; -#endif - dev->change_mtu = bcm_enet_change_mtu; - - SET_ETHTOOL_OPS(dev, &bcm_enet_ethtool_ops); - SET_NETDEV_DEV(dev, &pdev->dev); - - ret = register_netdev(dev); - if (ret) - goto err; - - platform_set_drvdata(pdev, dev); - priv->pdev = pdev; - priv->net_dev = dev; - - return 0; - -err: - if (mem_requested) - release_mem_region(res_mem->start, iomem_size); - if (mdio_registered) - mdiobus_unregister(&priv->mii_bus); - kfree(priv->mii_bus.irq); - if (priv->mac_clk) { - clk_disable(priv->mac_clk); - clk_put(priv->mac_clk); - } - if (priv->phy_clk) { - clk_disable(priv->phy_clk); - clk_put(priv->phy_clk); - } - if (priv->base) { - /* turn off mdc clock */ - enet_writel(priv, 0, ENET_MIISC_REG); - iounmap(priv->base); - } -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); - } 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"); |