usb_drv: Dimension queues for usbnet

+ Some code cleanup

Ref #773

dde_linux/patches/usbnet.patch

@@ -0,0 +1,37 @@
+diff -r b5bc236d605e drivers/net/usb/usbnet.c
+--- a/drivers/net/usb/usbnet.c	Mon Jun 17 10:27:00 2013 +0200
++++ b/drivers/net/usb/usbnet.c	Mon Jun 17 10:34:15 2013 +0200
+@@ -64,10 +64,29 @@
+  * is required, under load.  Jumbograms change the equation.
+  */
+ #define RX_MAX_QUEUE_MEMORY (60 * 1518)
+-#define	RX_QLEN(dev) (((dev)->udev->speed == USB_SPEED_HIGH) ? \
+-			(RX_MAX_QUEUE_MEMORY/(dev)->rx_urb_size) : 4)
+-#define	TX_QLEN(dev) (((dev)->udev->speed == USB_SPEED_HIGH) ? \
+-			(RX_MAX_QUEUE_MEMORY/(dev)->hard_mtu) : 4)
++inline unsigned RX_QLEN(struct usbnet *dev)
++{
++	switch(dev->udev->speed) {
++		case USB_SPEED_HIGH:
++			return RX_MAX_QUEUE_MEMORY/dev->rx_urb_size;
++		case USB_SPEED_SUPER:
++			return 16;
++		default:
++			return 4;
++		}
++}
++
++inline unsigned TX_QLEN(struct usbnet *dev)
++{
++	switch(dev->udev->speed) {
++		case USB_SPEED_HIGH:
++			return RX_MAX_QUEUE_MEMORY/dev->hard_mtu;
++		case USB_SPEED_SUPER:
++			return 16;
++		default:
++			return 4;
++	}
++}
+ 
+ // reawaken network queue this soon after stopping; else watchdog barks
+ #define TX_TIMEOUT_JIFFIES	(5*HZ)

dde_linux/src/lib/usb/include/nic/component.h

@@ -171,6 +171,7 @@ namespace Nic {
 					} else {
 						/* send to driver */
 						_device->tx(virt, packet.size());
+						tx_cnt++;
 					}
 
 					counter.inc(packet.size());

dde_linux/src/lib/usb/nic/nic.cc

@@ -314,6 +314,10 @@ int register_netdev(struct net_device *ndev)
 		if (ndev->netdev_ops->ndo_set_rx_mode)
 			ndev->netdev_ops->ndo_set_rx_mode(ndev);
 
+/*
+		if(ndev->netdev_ops->ndo_change_mtu)
+			ndev->netdev_ops->ndo_change_mtu(ndev, 4000);
+*/
 		_nic = nic;
 		env()->parent()->announce(ep_nic.manage(&root));
 	}
@@ -399,7 +403,6 @@ struct sk_buff *alloc_skb(unsigned int size, gfp_t priority)
 
 struct sk_buff *netdev_alloc_skb_ip_align(struct net_device *dev, unsigned int length)
 {
-	struct usbnet *d = (usbnet *)netdev_priv(dev);
 	struct sk_buff *s = _alloc_skb(length + NET_IP_ALIGN, false);
 	s->data += NET_IP_ALIGN;
 	s->tail += NET_IP_ALIGN;

dde_linux/src/lib/usb/signal/irq.cc

@@ -18,11 +18,10 @@ extern "C" {
 #include <dde_kit/interrupt.h>
 }
 
+#include<timer_session/connection.h>
 /* our local incarnation of sender and receiver */
 static Signal_helper *_signal = 0;
 static Genode::Lock   _irq_sync(Genode::Lock::LOCKED);
-static Genode::Lock   _irq_wait(Genode::Lock::LOCKED);
-
 
 /**
  * This contains the Linux-driver handlers
@@ -81,9 +80,6 @@ class Irq_context : public Driver_context,
 			static Genode::Lock handler_lock;
 			Genode::Lock::Guard guard(handler_lock);
 
-			/* unlock if main thread is waiting */
-			_irq_wait.unlock();
-
 			Irq_context *ctx = static_cast<Irq_context *>(irq);
 
 			/* set context & submit signal */
@@ -124,7 +120,9 @@ class Irq_context : public Driver_context,
 			/* report IRQ to all clients */
 			for (Irq_handler *h = _handler_list.first(); h; h = h->next()) {
 
-				handled |= _handle_one(h);
+				if (_handle_one(h))
+					break;
+
 				dde_kit_log(DEBUG_IRQ, "IRQ: %u ret: %u h: %p dev: %p", _irq, handled, h->handler, h->dev);
 			}
 
@@ -180,12 +178,6 @@ class Irq_context : public Driver_context,
 
 			return handled;
 		}
-
-		static void wait()
-		{
-			_irq_wait.lock();
-			check_irq();
-		}
 };
 
 
@@ -195,8 +187,7 @@ void Irq::init(Genode::Signal_receiver *recv) {
 
 void Irq::check_irq()
 {
-	if (!Irq_context::check_irq())
-		Irq_context::wait();
+	Irq_context::check_irq();
 }