Actually, just one question ... Am I right in thinking that there are no Ethernet/nic drivers for RPI in Genode?
Cheers Nick
--- Original Message ---
From: "buzz heavyyear" <buzzheavyyear@...16...> Sent: 30 November 2013 11:59 To: "genode-main-lists" genode-main@lists.sourceforge.net Subject: RE: Building for Raspberry Pi Ubuntu
Thanks Christian, looks like I'm going to have to start digging into RPi's drivers. Should be able to avoid dde_ipxe in that case. Thanks again CheersNick
Subject: RE: Building for Raspberry Pi Ubuntu From: christian.helmuth@...1... Date: Sat, 30 Nov 2013 12:50:49 +0100 To: genode-main@lists.sourceforge.net
Hi,
Seems you're missing the driver for RPi's NIC since such a driver is AFAIK not part of our repos. BTW dde_ipxe is only enabled for x86 platforms with PCI networking hardware.
Greets
Christian Helmuth Genode Labs
http://www.genode-labs.com/ · http://genode.org/ · /ˈdʒiː.nəʊd/
Genode Labs GmbH · Amtsgericht Dresden · HRB 28424 · Sitz Dresden Geschäftsführer: Dr.-Ing. Norman Feske, Christian Helmuth
Rapidly troubleshoot problems before they affect your business. Most IT organizations don't have a clear picture of how application performance affects their revenue. With AppDynamics, you get 100% visibility into your Java,.NET, & PHP application. Start your 15-day FREE TRIAL of AppDynamics Pro! http://pubads.g.doubleclick.net/gampad/clk?id=84349351&iu=/4140/ostg.clk... _______________________________________________ Genode-main mailing list Genode-main@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/genode-main
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Hi Nick,
on the Raspberry Pi, the network connector is attached to the SoC via a network-over-USB solution, similar to the Pandaboard. Technically, the network driver is already included in the current version of Genode. The relevant commit is:
https://github.com/genodelabs/genode/commit/93c7e852e94a1fd0374b4da218461ace...
However, as stated in the commit message, even though the driver shows some signs of life (e.g., some blinking LEDs), it remains largely untested and might need some debugging. To give it a try, I recommend to take the 'libports/run/lwip.run' script as starting point and follow the way of how the script works for omap4 (Panda). I.e., take a close look at the configuration of the USB driver.
That said, I am afraid that the current version of the USB driver will not yield stellar networking performance. Because of the strange way of how the DWC-OTG host controller works, there is an extremely high interrupt load on the system (circa 8000 IRQs per second even when USB is idle), draining the CPU. On Linux, the RPI developers came up with pretty creative hacks to make the situation bearable, in particular handling most of the interrupts via a FIQ handler and reflecting just a few IRQs to the actual host-controller driver via the MPHI device. Please have a look at the commit history for the driver [1] and the explanation by one of the authors [2] - it is pretty insightful:
[1] https://github.com/nfeske/dwc_otg/commits/r1 [2] http://comments.gmane.org/gmane.linux.kernel.rpi/438
So far, the Genode version of the driver does not use those performance optimizations.
Cheers Norman
On 11/30/2013 01:51 PM, buzz heavyyear wrote:
Actually, just one question ... Am I right in thinking that there are no Ethernet/nic drivers for RPI in Genode?
Cheers Nick
--- Original Message ---
From: "buzz heavyyear" <buzzheavyyear@...16...> Sent: 30 November 2013 11:59 To: "genode-main-lists" genode-main@lists.sourceforge.net Subject: RE: Building for Raspberry Pi Ubuntu
Thanks Christian, looks like I'm going to have to start digging into RPi's drivers. Should be able to avoid dde_ipxe in that case.
Thanks again
Cheers Nick
Subject: RE: Building for Raspberry Pi Ubuntu From: christian.helmuth@...1... Date: Sat, 30 Nov 2013 12:50:49 +0100 To: genode-main@lists.sourceforge.net
Hi,
Seems you're missing the driver for RPi's NIC since such a driver is
AFAIK not part of our repos. BTW dde_ipxe is only enabled for x86 platforms with PCI networking hardware.
Greets
Christian Helmuth Genode Labs
http://www.genode-labs.com/ · http://genode.org/ · /ˈdʒiː.nəʊd/
Genode Labs GmbH · Amtsgericht Dresden · HRB 28424 · Sitz Dresden Geschäftsführer: Dr.-Ing. Norman Feske, Christian Helmuth
Hi Norman, Thanks very much for taking time to reply to my miserable attempts at getting up to speed on Genode and RPi. I hope to get back to you with an optimised driver for genode over the next few days. Very bestNick
Date: Mon, 2 Dec 2013 11:50:38 +0100 From: norman.feske@...1... To: genode-main@lists.sourceforge.net Subject: Re: Building for Raspberry Pi Ubuntu
Hi Nick,
on the Raspberry Pi, the network connector is attached to the SoC via a network-over-USB solution, similar to the Pandaboard. Technically, the network driver is already included in the current version of Genode. The relevant commit is:
https://github.com/genodelabs/genode/commit/93c7e852e94a1fd0374b4da218461ace...
However, as stated in the commit message, even though the driver shows some signs of life (e.g., some blinking LEDs), it remains largely untested and might need some debugging. To give it a try, I recommend to take the 'libports/run/lwip.run' script as starting point and follow the way of how the script works for omap4 (Panda). I.e., take a close look at the configuration of the USB driver.
That said, I am afraid that the current version of the USB driver will not yield stellar networking performance. Because of the strange way of how the DWC-OTG host controller works, there is an extremely high interrupt load on the system (circa 8000 IRQs per second even when USB is idle), draining the CPU. On Linux, the RPI developers came up with pretty creative hacks to make the situation bearable, in particular handling most of the interrupts via a FIQ handler and reflecting just a few IRQs to the actual host-controller driver via the MPHI device. Please have a look at the commit history for the driver [1] and the explanation by one of the authors [2] - it is pretty insightful:
[1] https://github.com/nfeske/dwc_otg/commits/r1 [2] http://comments.gmane.org/gmane.linux.kernel.rpi/438
So far, the Genode version of the driver does not use those performance optimizations.
Cheers Norman
On 11/30/2013 01:51 PM, buzz heavyyear wrote:
Actually, just one question ... Am I right in thinking that there are no Ethernet/nic drivers for RPI in Genode?
Cheers Nick
--- Original Message ---
From: "buzz heavyyear" <buzzheavyyear@...16...> Sent: 30 November 2013 11:59 To: "genode-main-lists" genode-main@lists.sourceforge.net Subject: RE: Building for Raspberry Pi Ubuntu
Thanks Christian, looks like I'm going to have to start digging into RPi's drivers. Should be able to avoid dde_ipxe in that case.
Thanks again
Cheers Nick
Subject: RE: Building for Raspberry Pi Ubuntu From: christian.helmuth@...1... Date: Sat, 30 Nov 2013 12:50:49 +0100 To: genode-main@lists.sourceforge.net
Hi,
Seems you're missing the driver for RPi's NIC since such a driver is
AFAIK not part of our repos. BTW dde_ipxe is only enabled for x86 platforms with PCI networking hardware.
Greets
Christian Helmuth Genode Labs
http://www.genode-labs.com/ · http://genode.org/ · /ˈdʒiː.nəʊd/
Genode Labs GmbH · Amtsgericht Dresden · HRB 28424 · Sitz Dresden Geschäftsführer: Dr.-Ing. Norman Feske, Christian Helmuth
-- Dr.-Ing. Norman Feske Genode Labs
http://www.genode-labs.com · http://genode.org
Genode Labs GmbH · Amtsgericht Dresden · HRB 28424 · Sitz Dresden Geschäftsführer: Dr.-Ing. Norman Feske, Christian Helmuth
Rapidly troubleshoot problems before they affect your business. Most IT organizations don't have a clear picture of how application performance affects their revenue. With AppDynamics, you get 100% visibility into your Java,.NET, & PHP application. Start your 15-day FREE TRIAL of AppDynamics Pro! http://pubads.g.doubleclick.net/gampad/clk?id=84349351&iu=/4140/ostg.clk... _______________________________________________ Genode-main mailing list Genode-main@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/genode-main
-
buzz heavyyear -
Norman Feske