I want to run Genode-ARM on android system.
Thank you.
Regards, Ayesha
On Thu, 25 Oct 2018 at 15:30, users-request@lists.genode.org wrote:
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Today's Topics:
- Re: Genode on Secure Tablet (Christian Helmuth)
- Re: multiple devices, single driver (Alexander Boettcher)
- Re: multiple devices, single driver (Joel Nider)
Message: 1 Date: Wed, 24 Oct 2018 15:19:24 +0200 From: Christian Helmuth christian.helmuth@genode-labs.com To: users@lists.genode.org Subject: Re: Genode on Secure Tablet Message-ID: 20181024131924.GC4718@genode-labs.com Content-Type: text/plain; charset=utf-8
Hello Ayesha,
On Wed, Oct 24, 2018 at 01:34:51PM +0530, A Noor wrote:
I have successfully emulated ARM-Genode in Bionic beaver. I need to run
the
genode on the secure tablet now. Can anyone pls help me out through this process. A small help also accountable.
congrats for mastering the first step to run Genode on your secure tablet. Now as you really like to use the hardware, it is the best time to tell us which hardware platform you're addressing. Otherwise I'm afraid nobody will emerge for helping you.
Regards
Christian Helmuth Genode Labs
https://www.genode-labs.com/ · https://genode.org/ https://twitter.com/GenodeLabs · /ˈdʒiː.nəʊd/
Genode Labs GmbH · Amtsgericht Dresden · HRB 28424 · Sitz Dresden Geschäftsführer: Dr.-Ing. Norman Feske, Christian Helmuth
Message: 2 Date: Thu, 25 Oct 2018 08:08:04 +0200 From: Alexander Boettcher alexander.boettcher@genode-labs.com To: Genode users mailing list users@lists.genode.org, Joel Nider JOELN@il.ibm.com Subject: Re: multiple devices, single driver Message-ID: 8e5c2053-d5b3-6942-083b-e53931ddd885@genode-labs.com Content-Type: text/plain; charset=utf-8
Hello,
On 23.10.18 14:50, Joel Nider wrote:
I have been looking at several drivers in Genode, and they all seem to have static data - specifically a Heap object and Root object. I am wondering with this kind of setup, is it possible to manage more than
one
device with a single driver?
of course. As described in the Genode book [0] in chapter 3.2.3, the root object provides the implementation just of the interface. Whenever a client connects to a service (like a driver for nic, ahci, nvme, usb etc.) a session is established via this interface. The driver may associate (typically does so depending on your specified policy) one specific device it drives to this session - as done e.g. for drivers handling multiple devices, e.g. ahci, nvme, usb.
A driver may provide also different services, e.g. our old usb driver provides Nic, Block, Input (so several root interfaces).
Cheers,
Alex.
[0] https://www.genode.org/documentation/genode-foundations-18-05.pdf
-- Alexander Boettcher Genode Labs
https://www.genode-labs.com - https://www.genode.org
Genode Labs GmbH - Amtsgericht Dresden - HRB 28424 - Sitz Dresden Geschäftsführer: Dr.-Ing. Norman Feske, Christian Helmuth
Message: 3 Date: Thu, 25 Oct 2018 10:38:08 +0300 From: "Joel Nider" JOELN@il.ibm.com To: Alexander Boettcher alexander.boettcher@genode-labs.com Cc: Genode users mailing list users@lists.genode.org Subject: Re: multiple devices, single driver Message-ID: < OFE542A872.7CA6CBCD-ONC2258331.0026D25E-C2258331.0029F1A3@notes.na.collabserv.com
Content-Type: text/plain; charset="US-ASCII"
Hi Alex,
On 23.10.18 14:50, Joel Nider wrote:
I have been looking at several drivers in Genode, and they all seem to
have static data - specifically a Heap object and Root object. I am wondering with this kind of setup, is it possible to manage more than
one
device with a single driver?
of course. As described in the Genode book [0] in chapter 3.2.3, the root object provides the implementation just of the interface. Whenever a client connects to a service (like a driver for nic, ahci, nvme, usb etc.) a session is established via this interface. The driver may associate (typically does so depending on your specified policy) one specific device it drives to this session - as done e.g. for drivers handling multiple devices, e.g. ahci, nvme, usb.
I will give you my situation as a specific example. I am writing a driver for a PCIe attached NIC (x86 platform). Let us say that I have 2 physical NICs in my machine with the same device ID and vendor ID. I have specified in my config file that I have a driver called "nic_drv", without specifying the PCIe address (copied from the example in repos/os/run/ping.run).
When the driver starts, I can enumerate the PCIe devices through the Platform::Connection object that is instantiated from the 'env' object. I see all PCIe devices of class 'NET' (even other NICs that I don't want my driver to handle). So far so good. I can filter through the devices by requesting the capability (with Platform::Device_client) and I can read the device ID and vendor ID and pick the devices I want to handle.
Now I have a list of several devices that I want my driver handle. If I understand you correctly, I should have only one Root object (and one Heap object). That implies I should also only call parent().announce() once. But then how do I instantiate my Nic::Session_component once per device? What is happening so far, is that some time after I call parent().announce(), my Nic::Session_component derived class gets instantiated, and the constructor is called. But I have no way of knowing which device it is meant to handle, since there is no mechanism for passing the device capability to Nic::Session_component. In addition, I only see this constructor being called once. I expected to see one constructor per PCIe device. This causes further problems such as not being able to map the mmio region since the size and base address are not known until I query the PCIe BAR, and there is no 'new' operator available, which means to me I'm doing something fundamentally wrong.
So what is the correct way to build the driver such that I get an object per device (and the object knows the device)?
Thanks, Joel
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