static int net1080_rx_fixup(struct usbnet *dev, struct sk_buff *skb)
{
struct nc_header *header;
struct nc_trailer *trailer;
u16 hdr_len, packet_len;
/* This check is no longer done by usbnet */
if (skb->len < dev->net->hard_header_len)
return 0;
if (!(skb->len & 0x01)) {
netdev_dbg(dev->net, "rx framesize %d range %d..%d mtu %d\n",
skb->len, dev->net->hard_header_len, dev->hard_mtu,
dev->net->mtu);
dev->net->stats.rx_frame_errors++;
nc_ensure_sync(dev);
return 0;
}
header = (struct nc_header *) skb->data;
hdr_len = le16_to_cpup(&header->hdr_len);
packet_len = le16_to_cpup(&header->packet_len);
if (FRAMED_SIZE(packet_len) > NC_MAX_PACKET) {
dev->net->stats.rx_frame_errors++;
netdev_dbg(dev->net, "packet too big, %d\n", packet_len);
nc_ensure_sync(dev);
return 0;
} else if (hdr_len < MIN_HEADER) {
dev->net->stats.rx_frame_errors++;
netdev_dbg(dev->net, "header too short, %d\n", hdr_len);
nc_ensure_sync(dev);
return 0;
} else if (hdr_len > MIN_HEADER) {
// out of band data for us?
netdev_dbg(dev->net, "header OOB, %d bytes\n", hdr_len - MIN_HEADER);
nc_ensure_sync(dev);
// switch (vendor/product ids) { ... }
}
skb_pull(skb, hdr_len);
trailer = (struct nc_trailer *)
(skb->data + skb->len - sizeof *trailer);
skb_trim(skb, skb->len - sizeof *trailer);
if ((packet_len & 0x01) == 0) {
if (skb->data [packet_len] != PAD_BYTE) {
dev->net->stats.rx_frame_errors++;
netdev_dbg(dev->net, "bad pad\n");
return 0;
}
skb_trim(skb, skb->len - 1);
}
if (skb->len != packet_len) {
dev->net->stats.rx_frame_errors++;
netdev_dbg(dev->net, "bad packet len %d (expected %d)\n",
skb->len, packet_len);
nc_ensure_sync(dev);
return 0;
}
if (header->packet_id != get_unaligned(&trailer->packet_id)) {
dev->net->stats.rx_fifo_errors++;
netdev_dbg(dev->net, "(2+ dropped) rx packet_id mismatch 0x%x 0x%x\n",
le16_to_cpu(header->packet_id),
le16_to_cpu(trailer->packet_id));
return 0;
}
#if 0
netdev_dbg(dev->net, "frame <rx h %d p %d id %d\n", header->hdr_len,
header->packet_len, header->packet_id);
#endif
dev->frame_errors = 0;
return 1;
}
static void rx_submit (struct usbnet *dev, struct urb *urb, int flags)
{
struct sk_buff *skb;
struct skb_data *entry;
int retval = 0;
unsigned long lockflags;
size_t size;
#ifdef CONFIG_USB_NET1080
if (dev->driver_info->flags & FLAG_FRAMING_NC)
size = FRAMED_SIZE (dev->net.mtu);
else
#endif
#ifdef CONFIG_USB_GENESYS
if (dev->driver_info->flags & FLAG_FRAMING_GL)
size = GL_RCV_BUF_SIZE;
else
#endif
size = (sizeof (struct ethhdr) + dev->net.mtu);
if ((skb = alloc_skb (size, flags)) == 0) {
dbg ("no rx skb");
tasklet_schedule (&dev->bh);
usb_free_urb (urb);
return;
}
entry = (struct skb_data *) skb->cb;
entry->urb = urb;
entry->dev = dev;
entry->state = rx_start;
entry->length = 0;
FILL_BULK_URB (urb, dev->udev,
usb_rcvbulkpipe (dev->udev, dev->driver_info->in),
skb->data, size, rx_complete, skb);
urb->transfer_flags |= USB_ASYNC_UNLINK;
#ifdef REALLY_QUEUE
urb->transfer_flags |= USB_QUEUE_BULK;
#endif
#if 0
// Idle-but-posted reads with UHCI really chew up
// PCI bandwidth unless FSBR is disabled
urb->transfer_flags |= USB_NO_FSBR;
#endif
spin_lock_irqsave (&dev->rxq.lock, lockflags);
if (netif_running (&dev->net)) {
if ((retval = usb_submit_urb (urb)) != 0) {
dbg ("%s rx submit, %d", dev->net.name, retval);
tasklet_schedule (&dev->bh);
} else {
__skb_queue_tail (&dev->rxq, skb);
}
} else {
dbg ("rx: stopped");
retval = -ENOLINK;
}
spin_unlock_irqrestore (&dev->rxq.lock, lockflags);
if (retval) {
dev_kfree_skb_any (skb);
usb_free_urb (urb);
}
}
