/* Callback transmission routine */
static void ksdazzle_send_irq(struct urb *urb)
{
struct ksdazzle_cb *kingsun = urb->context;
struct net_device *netdev = kingsun->netdev;
int ret = 0;
/* in process of stopping, just drop data */
if (!netif_running(kingsun->netdev)) {
err("ksdazzle_send_irq: Network not running!");
return;
}
/* unlink, shutdown, unplug, other nasties */
if (urb->status != 0) {
err("ksdazzle_send_irq: urb asynchronously failed - %d",
urb->status);
return;
}
if (kingsun->tx_buf_clear_used > 0) {
/* Update data remaining to be sent */
if (kingsun->tx_buf_clear_sent < kingsun->tx_buf_clear_used) {
memmove(kingsun->tx_buf_clear,
kingsun->tx_buf_clear +
kingsun->tx_buf_clear_sent,
kingsun->tx_buf_clear_used -
kingsun->tx_buf_clear_sent);
}
kingsun->tx_buf_clear_used -= kingsun->tx_buf_clear_sent;
kingsun->tx_buf_clear_sent = 0;
if (kingsun->tx_buf_clear_used > 0) {
/* There is more data to be sent */
if ((ret = ksdazzle_submit_tx_fragment(kingsun)) != 0) {
err("ksdazzle_send_irq: failed tx_urb submit: %d", ret);
switch (ret) {
case -ENODEV:
case -EPIPE:
break;
default:
netdev->stats.tx_errors++;
netif_start_queue(netdev);
}
}
} else {
/* All data sent, send next speed && wake network queue */
if (kingsun->new_speed != -1 &&
cpu_to_le32(kingsun->new_speed) !=
kingsun->speedparams.baudrate)
ksdazzle_change_speed(kingsun,
kingsun->new_speed);
netif_wake_queue(netdev);
}
}
}
/*
* Called from net/core when new frame is available.
*/
static int ksdazzle_hard_xmit(struct sk_buff *skb, struct net_device *netdev)
{
struct ksdazzle_cb *kingsun;
unsigned int wraplen;
int ret = 0;
if (skb == NULL || netdev == NULL)
return -EINVAL;
netif_stop_queue(netdev);
/* the IRDA wrapping routines don't deal with non linear skb */
SKB_LINEAR_ASSERT(skb);
kingsun = netdev_priv(netdev);
spin_lock(&kingsun->lock);
kingsun->new_speed = irda_get_next_speed(skb);
/* Append data to the end of whatever data remains to be transmitted */
wraplen =
async_wrap_skb(skb, kingsun->tx_buf_clear, KINGSUN_SND_FIFO_SIZE);
kingsun->tx_buf_clear_used = wraplen;
if ((ret = ksdazzle_submit_tx_fragment(kingsun)) != 0) {
err("ksdazzle_hard_xmit: failed tx_urb submit: %d", ret);
switch (ret) {
case -ENODEV:
case -EPIPE:
break;
default:
netdev->stats.tx_errors++;
netif_start_queue(netdev);
}
} else {
netdev->stats.tx_packets++;
netdev->stats.tx_bytes += skb->len;
}
dev_kfree_skb(skb);
spin_unlock(&kingsun->lock);
return ret;
}
