static int ks8842_tx_frame(struct sk_buff *skb, struct net_device *netdev)
{
struct ks8842_adapter *adapter = netdev_priv(netdev);
int len = skb->len;
netdev_dbg(netdev, "%s: len %u head %p data %p tail %p end %p\n",
__func__, skb->len, skb->head, skb->data,
skb_tail_pointer(skb), skb_end_pointer(skb));
/* check FIFO buffer space, we need space for CRC and command bits */
if (ks8842_tx_fifo_space(adapter) < len + 8)
return NETDEV_TX_BUSY;
if (adapter->conf_flags & KS884X_16BIT) {
u16 *ptr16 = (u16 *)skb->data;
ks8842_write16(adapter, 17, 0x8000 | 0x100, REG_QMU_DATA_LO);
ks8842_write16(adapter, 17, (u16)len, REG_QMU_DATA_HI);
netdev->stats.tx_bytes += len;
/* copy buffer */
while (len > 0) {
iowrite16(*ptr16++, adapter->hw_addr + REG_QMU_DATA_LO);
iowrite16(*ptr16++, adapter->hw_addr + REG_QMU_DATA_HI);
len -= sizeof(u32);
}
} else {
u32 *ptr = (u32 *)skb->data;
u32 ctrl;
/* the control word, enable IRQ, port 1 and the length */
ctrl = 0x8000 | 0x100 | (len << 16);
ks8842_write32(adapter, 17, ctrl, REG_QMU_DATA_LO);
netdev->stats.tx_bytes += len;
/* copy buffer */
while (len > 0) {
iowrite32(*ptr, adapter->hw_addr + REG_QMU_DATA_LO);
len -= sizeof(u32);
ptr++;
}
}
/* enqueue packet */
ks8842_write16(adapter, 17, 1, REG_TXQCR);
dev_kfree_skb(skb);
return NETDEV_TX_OK;
}
static netdev_tx_t ks8842_xmit_frame(struct sk_buff *skb,
struct net_device *netdev)
{
int ret;
struct ks8842_adapter *adapter = netdev_priv(netdev);
dev_dbg(&adapter->pdev->dev, "%s: entry\n", __func__);
ret = ks8842_tx_frame(skb, netdev);
if (ks8842_tx_fifo_space(adapter) < netdev->mtu + 8)
netif_stop_queue(netdev);
return ret;
}
