RPI-B as router

[Oleksandr Tymoshenko]

On 2013-03-21, at 8:04 AM, Alexey V. Panfilov <lehis2000 at mail.ru> wrote:

> Hi
> 
> I decide to test RRI-B as simple router (without NAT): [Host A] ---
> [RPI-B] --- [Host B]
> 
> I've created two vlans on RPI (if_vlan.ko was load as module) and run
> iperf between Host A and Host B:
> 
> [Host A~]# iperf -c 192.168.0.249 -P 5 -i 5 -t 300 | grep SUM
> [SUM]  0.0- 5.0 sec  4.62 MBytes  7.76 Mbits/sec
> [SUM]  5.0-10.0 sec  4.75 MBytes  7.97 Mbits/sec
> [SUM] 10.0-15.0 sec  4.25 MBytes  7.13 Mbits/sec
> 
> So RPI-B network's throughput was around 20Mbit/sec of full-duplex traffic:

The problem is that USB works in PIO mode. With DMA mode enabled 
it's somewhat faster. Here is my half-baked patch:

http://people.freebsd.org/~gonzo/patches/dwc_otg-dma-nosplit.diff

Network interface should work, although USB keyboards will not work 
with this patch.