Exemplo n.º 1
0
static void dumpspeed(struct usbnet *dev, __le32 *speeds)
{
	if (netif_msg_timer(dev))
		devinfo(dev, "link speeds: %u kbps up, %u kbps down",
			__le32_to_cpu(speeds[0]) / 1000,
		__le32_to_cpu(speeds[1]) / 1000);
}
Exemplo n.º 2
0
static void intr_complete(struct urb *urb)
#endif
{
	struct usbnet	*dev = urb->context;
	int		status = urb->status;

	switch (status) {
	/* success */
	case 0:
		dev->driver_info->status(dev, urb);
		break;

	/* software-driven interface shutdown */
	case -ENOENT:		/* urb killed */
	case -ESHUTDOWN:	/* hardware gone */
		if (netif_msg_ifdown(dev))
			devdbg(dev, "intr shutdown, code %d", status);
		return;

	/* NOTE:  not throttling like RX/TX, since this endpoint
	 * already polls infrequently
	 */
	default:
		devdbg(dev, "intr status %d", status);
		break;
	}

	if (!netif_running(dev->net))
		return;

	memset(urb->transfer_buffer, 0, urb->transfer_buffer_length);
	status = usb_submit_urb(urb, GFP_ATOMIC);
	if (status != 0 && netif_msg_timer(dev))
		deverr(dev, "intr resubmit --> %d", status);
}
Exemplo n.º 3
0
static void c2_tx_timeout(struct net_device *netdev)
{
	struct c2_port *c2_port = netdev_priv(netdev);

	if (netif_msg_timer(c2_port))
		pr_debug("%s: tx timeout\n", netdev->name);

	c2_tx_clean(c2_port);
}
Exemplo n.º 4
0
static void cdc_status(struct usbnet *dev, struct urb *urb)
{
	struct usb_cdc_notification	*event;

	if (urb->actual_length < sizeof *event)
		return;

	/* SPEED_CHANGE can get split into two 8-byte packets */
	if (test_and_clear_bit(EVENT_STS_SPLIT, &dev->flags)) {
		dumpspeed(dev, (__le32 *) urb->transfer_buffer);
		return;
	}

	event = urb->transfer_buffer;
	switch (event->bNotificationType) {
	case USB_CDC_NOTIFY_NETWORK_CONNECTION:
		if (netif_msg_timer(dev))
			devdbg(dev, "CDC: carrier %s",
					event->wValue ? "on" : "off");
		if (event->wValue)
			netif_carrier_on(dev->net);
		else
			netif_carrier_off(dev->net);
		break;
	case USB_CDC_NOTIFY_SPEED_CHANGE:	/* tx/rx rates */
		if (netif_msg_timer(dev))
			devdbg(dev, "CDC: speed change (len %d)",
					urb->actual_length);
		if (urb->actual_length != (sizeof *event + 8))
			set_bit(EVENT_STS_SPLIT, &dev->flags);
		else
			dumpspeed(dev, (__le32 *) &event[1]);
		break;
	/* USB_CDC_NOTIFY_RESPONSE_AVAILABLE can happen too (e.g. RNDIS),
	 * but there are no standard formats for the response data.
	 */
	default:
		deverr(dev, "CDC: unexpected notification %02x!",
				 event->bNotificationType);
		break;
	}
}
Exemplo n.º 5
0
static void ks8851_tx_timeout(struct net_device *ndev)
{
    struct ks8851_net *ks = netdev_priv(ndev);

    if (netif_msg_timer(ks))
        dev_err(&ndev->dev, " tx timeout\n");

    ndev->stats.tx_errors++;
    /* can't restart safely under softirq */
    schedule_work(&ks->restart_work);
}
Exemplo n.º 6
0
/* Our watchdog timed out. Called by the networking layer */
static void emac_timeout(struct net_device *dev)
{
	struct emac_board_info *db = netdev_priv(dev);
	unsigned long flags;

	if (netif_msg_timer(db))
		dev_err(db->dev, "tx time out.\n");

	/* Save previous register address */
	spin_lock_irqsave(&db->lock, flags);

	netif_stop_queue(dev);
	emac_reset(db);
	emac_init_device(dev);
	/* We can accept TX packets again */
	netif_trans_update(dev);
	netif_wake_queue(dev);

	/* Restore previous register address */
	spin_unlock_irqrestore(&db->lock, flags);
}
Exemplo n.º 7
0
/* Timeout function */
static void sh_eth_tx_timeout(struct net_device *ndev)
{
	struct sh_eth_private *mdp = netdev_priv(ndev);
	struct sh_eth_rxdesc *rxdesc;
	int i;

	netif_stop_queue(ndev);

	if (netif_msg_timer(mdp))
		dev_err(&ndev->dev, "%s: transmit timed out, status %8.8x,"
	       " resetting...\n", ndev->name, (int)sh_eth_read(ndev, EESR));

	/* tx_errors count up */
	mdp->stats.tx_errors++;

	/* timer off */
	del_timer_sync(&mdp->timer);

	/* Free all the skbuffs in the Rx queue. */
	for (i = 0; i < RX_RING_SIZE; i++) {
		rxdesc = &mdp->rx_ring[i];
		rxdesc->status = 0;
		rxdesc->addr = 0xBADF00D0;
		if (mdp->rx_skbuff[i])
			dev_kfree_skb(mdp->rx_skbuff[i]);
		mdp->rx_skbuff[i] = NULL;
	}
	for (i = 0; i < TX_RING_SIZE; i++) {
		if (mdp->tx_skbuff[i])
			dev_kfree_skb(mdp->tx_skbuff[i]);
		mdp->tx_skbuff[i] = NULL;
	}

	/* device init */
	sh_eth_dev_init(ndev);

	/* timer on */
	mdp->timer.expires = (jiffies + (24 * HZ)) / 10;/* 2.4 sec. */
	add_timer(&mdp->timer);
}
Exemplo n.º 8
0
static void rx_submit (struct usbnet *dev, struct urb *urb, gfp_t flags)
{
	struct sk_buff		*skb;
	struct skb_data		*entry;
	int			retval = 0;
	unsigned long		lockflags;
	size_t			size = dev->rx_urb_size;

#if defined(CONFIG_RA_HW_NAT_PCI) && (defined(CONFIG_RA_HW_NAT) || defined(CONFIG_RA_HW_NAT_MODULE))
	if ((skb = alloc_skb (size + NET_IP_ALIGN + FOE_INFO_LEN, flags)) == NULL) {
#else
	if ((skb = alloc_skb (size + NET_IP_ALIGN, flags)) == NULL) {
#endif
		if (netif_msg_rx_err (dev))
			devdbg (dev, "no rx skb");
		usbnet_defer_kevent (dev, EVENT_RX_MEMORY);
		usb_free_urb (urb);
		return;
	}
#if defined(CONFIG_RA_HW_NAT_PCI) && (defined(CONFIG_RA_HW_NAT) || defined(CONFIG_RA_HW_NAT_MODULE))
	skb_reserve (skb, NET_IP_ALIGN + FOE_INFO_LEN);
#else
	skb_reserve (skb, NET_IP_ALIGN);
#endif
	entry = (struct skb_data *) skb->cb;
	entry->urb = urb;
	entry->dev = dev;
	entry->length = 0;

	usb_fill_bulk_urb (urb, dev->udev, dev->in,
		skb->data, size, rx_complete, skb);

	spin_lock_irqsave (&dev->rxq.lock, lockflags);

	if (netif_running (dev->net)
			&& netif_device_present (dev->net)
			&& !test_bit (EVENT_RX_HALT, &dev->flags)) {
		switch (retval = usb_submit_urb (urb, GFP_ATOMIC)){
		case -EPIPE:
			usbnet_defer_kevent (dev, EVENT_RX_HALT);
			break;
		case -ENOMEM:
			usbnet_defer_kevent (dev, EVENT_RX_MEMORY);
			break;
		case -ENODEV:
			if (netif_msg_ifdown (dev))
				devdbg (dev, "device gone");
			netif_device_detach (dev->net);
			break;
		default:
			if (netif_msg_rx_err (dev))
				devdbg (dev, "rx submit, %d", retval);
			tasklet_schedule (&dev->bh);
			break;
		case 0:
			__usbnet_queue_skb(&dev->rxq, skb, rx_start);
		}
	} else {
		if (netif_msg_ifdown (dev))
			devdbg (dev, "rx: stopped");
		retval = -ENOLINK;
	}
	spin_unlock_irqrestore (&dev->rxq.lock, lockflags);
	if (retval) {
		dev_kfree_skb_any (skb);
		usb_free_urb (urb);
	}
}


/*-------------------------------------------------------------------------*/

static inline void rx_process (struct usbnet *dev, struct sk_buff *skb)
{
	if (dev->driver_info->rx_fixup
			&& !dev->driver_info->rx_fixup (dev, skb))
		goto error;
	// else network stack removes extra byte if we forced a short packet

	if (skb->len)
		usbnet_skb_return (dev, skb);
	else {
		if (netif_msg_rx_err (dev))
			devdbg (dev, "drop");
error:
		dev->stats.rx_errors++;
		skb_queue_tail (&dev->done, skb);
	}
}

/*-------------------------------------------------------------------------*/

static void rx_complete (struct urb *urb)
{
	struct sk_buff		*skb = (struct sk_buff *) urb->context;
	struct skb_data		*entry = (struct skb_data *) skb->cb;
	struct usbnet		*dev = entry->dev;
	int			urb_status = urb->status;
	enum skb_state		state;

	skb_put (skb, urb->actual_length);
	state = rx_done;
	entry->urb = NULL;

	switch (urb_status) {
	    // success
	    case 0:
		if (skb->len < dev->net->hard_header_len) {
			state = rx_cleanup;
			dev->stats.rx_errors++;
			dev->stats.rx_length_errors++;
			if (netif_msg_rx_err (dev))
				devdbg (dev, "rx length %d", skb->len);
		}
		break;

	    // stalls need manual reset. this is rare ... except that
	    // when going through USB 2.0 TTs, unplug appears this way.
	    // we avoid the highspeed version of the ETIMEOUT/EILSEQ
	    // storm, recovering as needed.
	    case -EPIPE:
		dev->stats.rx_errors++;
		usbnet_defer_kevent (dev, EVENT_RX_HALT);
		// FALLTHROUGH

	    // software-driven interface shutdown
	    case -ECONNRESET:		// async unlink
	    case -ESHUTDOWN:		// hardware gone
		if (netif_msg_ifdown (dev))
			devdbg (dev, "rx shutdown, code %d", urb_status);
		goto block;

	    // we get controller i/o faults during khubd disconnect() delays.
	    // throttle down resubmits, to avoid log floods; just temporarily,
	    // so we still recover when the fault isn't a khubd delay.
	    case -EPROTO:
	    case -ETIME:
	    case -EILSEQ:
		dev->stats.rx_errors++;
		if (!timer_pending (&dev->delay)) {
			mod_timer (&dev->delay, jiffies + THROTTLE_JIFFIES);
			if (netif_msg_link (dev))
				devdbg (dev, "rx throttle %d", urb_status);
		}
block:
		state = rx_cleanup;
		entry->urb = urb;
		urb = NULL;
		break;

	    // data overrun ... flush fifo?
	    case -EOVERFLOW:
		dev->stats.rx_over_errors++;
		// FALLTHROUGH

	    default:
		state = rx_cleanup;
		dev->stats.rx_errors++;
		if (netif_msg_rx_err (dev))
			devdbg (dev, "rx status %d", urb_status);
		break;
	}

	state = defer_bh(dev, skb, &dev->rxq, state);

	if (urb) {
		if (netif_running (dev->net)
		    && !test_bit (EVENT_RX_HALT, &dev->flags) &&
		    state != unlink_start) {
			rx_submit (dev, urb, GFP_ATOMIC);
			return;
		}
		usb_free_urb (urb);
	}
	if (netif_msg_rx_err (dev))
		devdbg (dev, "no read resubmitted");
}

static void intr_complete (struct urb *urb)
{
	struct usbnet	*dev = urb->context;
	int		status = urb->status;

	switch (status) {
	    /* success */
	    case 0:
		dev->driver_info->status(dev, urb);
		break;

	    /* software-driven interface shutdown */
	    case -ENOENT:		// urb killed
	    case -ESHUTDOWN:		// hardware gone
		if (netif_msg_ifdown (dev))
			devdbg (dev, "intr shutdown, code %d", status);
		return;

	    /* NOTE:  not throttling like RX/TX, since this endpoint
	     * already polls infrequently
	     */
	    default:
		devdbg (dev, "intr status %d", status);
		break;
	}

	memset(urb->transfer_buffer, 0, urb->transfer_buffer_length);
	status = usb_submit_urb (urb, GFP_ATOMIC);
	if (status != 0 && netif_msg_timer (dev))
		deverr(dev, "intr resubmit --> %d", status);
}

/*-------------------------------------------------------------------------*/

// unlink pending rx/tx; completion handlers do all other cleanup

static int unlink_urbs (struct usbnet *dev, struct sk_buff_head *q)
{
	unsigned long		flags;
	struct sk_buff		*skb;
	int			count = 0;

	spin_lock_irqsave (&q->lock, flags);
	while (!skb_queue_empty(q)) {
		struct skb_data		*entry;
		struct urb		*urb;
		int			retval;

		skb_queue_walk(q, skb) {
		entry = (struct skb_data *) skb->cb;
			if (entry->state != unlink_start)
				goto found;
		}
		break;
found:
		entry->state = unlink_start;
		urb = entry->urb;

		/*
		 * Get reference count of the URB to avoid it to be
		 * freed during usb_unlink_urb, which may trigger
		 * use-after-free problem inside usb_unlink_urb since
		 * usb_unlink_urb is always racing with .complete
		 * handler(include defer_bh).
		 */
		usb_get_urb(urb);
		spin_unlock_irqrestore(&q->lock, flags);
		// during some PM-driven resume scenarios,
		// these (async) unlinks complete immediately
		retval = usb_unlink_urb (urb);
		if (retval != -EINPROGRESS && retval != 0)
			devdbg (dev, "unlink urb err, %d", retval);
		else
			count++;
		usb_put_urb(urb);
		spin_lock_irqsave(&q->lock, flags);
	}