diff options
Diffstat (limited to 'drivers/net/gianfar.c')
| -rw-r--r-- | drivers/net/gianfar.c | 87 |
1 files changed, 41 insertions, 46 deletions
diff --git a/drivers/net/gianfar.c b/drivers/net/gianfar.c index 6dc9361495b..9057a1df8e9 100644 --- a/drivers/net/gianfar.c +++ b/drivers/net/gianfar.c @@ -131,7 +131,8 @@ static void gfar_netpoll(struct net_device *dev); #endif int gfar_clean_rx_ring(struct net_device *dev, int rx_work_limit); static int gfar_clean_tx_ring(struct net_device *dev); -static int gfar_process_frame(struct net_device *dev, struct sk_buff *skb, int length); +static int gfar_process_frame(struct net_device *dev, struct sk_buff *skb, + int amount_pull); static void gfar_vlan_rx_register(struct net_device *netdev, struct vlan_group *grp); void gfar_halt(struct net_device *dev); @@ -210,6 +211,7 @@ static int gfar_of_init(struct net_device *dev) FSL_GIANFAR_DEV_HAS_COALESCE | FSL_GIANFAR_DEV_HAS_RMON | FSL_GIANFAR_DEV_HAS_MULTI_INTR | + FSL_GIANFAR_DEV_HAS_PADDING | FSL_GIANFAR_DEV_HAS_CSUM | FSL_GIANFAR_DEV_HAS_VLAN | FSL_GIANFAR_DEV_HAS_MAGIC_PACKET | @@ -1668,59 +1670,38 @@ static inline void gfar_rx_checksum(struct sk_buff *skb, struct rxfcb *fcb) } -static inline struct rxfcb *gfar_get_fcb(struct sk_buff *skb) -{ - struct rxfcb *fcb = (struct rxfcb *)skb->data; - - /* Remove the FCB from the skb */ - skb_pull(skb, GMAC_FCB_LEN); - - return fcb; -} - /* gfar_process_frame() -- handle one incoming packet if skb * isn't NULL. */ static int gfar_process_frame(struct net_device *dev, struct sk_buff *skb, - int length) + int amount_pull) { struct gfar_private *priv = netdev_priv(dev); struct rxfcb *fcb = NULL; - if (NULL == skb) { - if (netif_msg_rx_err(priv)) - printk(KERN_WARNING "%s: Missing skb!!.\n", dev->name); - dev->stats.rx_dropped++; - priv->extra_stats.rx_skbmissing++; - } else { - int ret; + int ret; - /* Prep the skb for the packet */ - skb_put(skb, length); + /* fcb is at the beginning if exists */ + fcb = (struct rxfcb *)skb->data; - /* Grab the FCB if there is one */ - if (gfar_uses_fcb(priv)) - fcb = gfar_get_fcb(skb); - - /* Remove the padded bytes, if there are any */ - if (priv->padding) - skb_pull(skb, priv->padding); + /* Remove the FCB from the skb */ + /* Remove the padded bytes, if there are any */ + if (amount_pull) + skb_pull(skb, amount_pull); - if (priv->rx_csum_enable) - gfar_rx_checksum(skb, fcb); + if (priv->rx_csum_enable) + gfar_rx_checksum(skb, fcb); - /* Tell the skb what kind of packet this is */ - skb->protocol = eth_type_trans(skb, dev); + /* Tell the skb what kind of packet this is */ + skb->protocol = eth_type_trans(skb, dev); - /* Send the packet up the stack */ - if (unlikely(priv->vlgrp && (fcb->flags & RXFCB_VLN))) { - ret = vlan_hwaccel_receive_skb(skb, priv->vlgrp, - fcb->vlctl); - } else - ret = netif_receive_skb(skb); + /* Send the packet up the stack */ + if (unlikely(priv->vlgrp && (fcb->flags & RXFCB_VLN))) + ret = vlan_hwaccel_receive_skb(skb, priv->vlgrp, fcb->vlctl); + else + ret = netif_receive_skb(skb); - if (NET_RX_DROP == ret) - priv->extra_stats.kernel_dropped++; - } + if (NET_RX_DROP == ret) + priv->extra_stats.kernel_dropped++; return 0; } @@ -1733,13 +1714,17 @@ int gfar_clean_rx_ring(struct net_device *dev, int rx_work_limit) { struct rxbd8 *bdp; struct sk_buff *skb; - u16 pkt_len; + int pkt_len; + int amount_pull; int howmany = 0; struct gfar_private *priv = netdev_priv(dev); /* Get the first full descriptor */ bdp = priv->cur_rx; + amount_pull = (gfar_uses_fcb(priv) ? GMAC_FCB_LEN : 0) + + priv->padding; + while (!((bdp->status & RXBD_EMPTY) || (--rx_work_limit < 0))) { struct sk_buff *newskb; rmb(); @@ -1767,12 +1752,22 @@ int gfar_clean_rx_ring(struct net_device *dev, int rx_work_limit) dev->stats.rx_packets++; howmany++; - /* Remove the FCS from the packet length */ - pkt_len = bdp->length - 4; + if (likely(skb)) { + pkt_len = bdp->length - ETH_FCS_LEN; + /* Remove the FCS from the packet length */ + skb_put(skb, pkt_len); + dev->stats.rx_bytes += pkt_len; + + gfar_process_frame(dev, skb, amount_pull); - gfar_process_frame(dev, skb, pkt_len); + } else { + if (netif_msg_rx_err(priv)) + printk(KERN_WARNING + "%s: Missing skb!\n", dev->name); + dev->stats.rx_dropped++; + priv->extra_stats.rx_skbmissing++; + } - dev->stats.rx_bytes += pkt_len; } priv->rx_skbuff[priv->skb_currx] = newskb; |