Regarding ARM on Genode virt_qemu_arm_v8a

[Divya Sharma]

Thanks Norman and Martin for details explanation,

I removed the static drivers configuration rules from drivers subsystem and
kept the other scripts(like sculpt.run) as it is modified at [1] and got
the following log entries in terminal when clicked on wired in Sculpt.

[init -> runtime] child "nic_drv"
[init -> runtime]   RAM quota:  20232K
[init -> runtime]   cap quota:  266
[init -> runtime]   ELF binary: nic_drv  -->
[init -> runtime]   priority:   2
[init -> runtime] child "nic_router"
[init -> runtime]   RAM quota:  9992K
[init -> runtime]   cap quota:  266
[init -> runtime]   ELF binary: nic_router
[init -> runtime]   priority:   2
[init -> runtime]   provides service Nic
[init -> runtime]   provides service Uplink

Seeing above logs it seems that nic_drv is not able to load the
virtio_mmio_nic(instead  ELF binary: nic_drv) ELF binary at runtime and mac
address allocation, I don't know why.
Also I did further  modification [2] [3] to sculpt.run to make it happen
which is shown below.

[1]
proc nic_drv { } {

if {[have_board pc]}          { return ipxe_nic_drv }
if {[have_board imx8q_evk]}   { return fec_nic_drv  }
if {[have_board mnt_reform2]} { return fec_nic_drv  }
if {[have_board virt_qemu_arm_v8a]} { return virtio_mmio_nic  }  //added
binary

return nic_unavailable
}

https://github.com/genodelabs/genode/blob/master/repos/gems/run/sculpt.run#L153

[2]
proc virtio_mmio_nic { } {  // proc nic_drv -->

if {[have_board pc]}          { return ipxe_nic_drv }
if {[have_board imx8q_evk]}   { return fec_nic_drv  }
if {[have_board mnt_reform2]} { return fec_nic_drv  }
if {[have_board virt_qemu_arm_v8a]} { return virtio_mmio_nic  }  //added
binary

return nic_unavailable
}

[3]
   <service name="ROM" label="nic_drv">     <parent label="}
[virtio_mmio_nic] {"/> </service>

https://github.com/genodelabs/genode/blob/master/repos/gems/run/sculpt.run#L631


still the progress is the same, not  able to set up the network  in the
sculpt .
Is there anything else that needs to be taken care of or changed ??


Thanks.
DIVYA.


On Tue, Mar 28, 2023 at 3:32 PM Norman Feske <norman.feske at genode-labs.com>
wrote:

> Hello,
>
> >     I modified the sculpt.run as you said but still the uplink session
> >     is not getting created may be because of the label mismatch.
> >
> >     [init] Warning: drivers: no route to service "Uplink"
> >     (label="drivers -> virtio_mmio_nic -> ")
> >     [init -> drivers -> virtio_mmio_nic] Error: Uplink-session creation
> >     failed (ram_quota=3538944, cap_quota=8,
> >     mac_address="52:54:00:12:34:56", tx_buf_size=1638400,
> >     rx_buf_size=1638400, label="")
> >     [init -> drivers -> virtio_mmio_nic] Error: Uncaught exception of
> >     type 'Genode::Service_denied'
>
> this message tells us that you have added the network driver to the
> drivers subsystem. It does not belong there. In fact, if you inspect the
> routing rules for the 'drivers' subsystem [1] in sculpt.run, you will
> see that the drivers subsystem is not supposed to request any 'Uplink'
> session. So the driver's attempt to request such a session is denied.
>
> Sculpt hosts the network driver inside the runtime subsystem. The driver
> is dynamically spawned by the sculpt manager - always named 'nic_drv' -
> once the user selects 'LAN' in the network dialog. The change in [2] is
> needed because the executable binary of the driver (as present in core's
> ROM service) is named differently from 'nic_drv'. With the relabeling in
> place (see [3]), the runtime subsystem will obtain the 'virtio_mmio_nic'
> executable binary whenever a ROM named "nic_drv" is requested from
> within the runtime subsystem.
>
> [1]
>
> https://github.com/genodelabs/genode/blob/master/repos/gems/run/sculpt.run#L377
> [2]
>
> https://github.com/genodelabs/genode/blob/master/repos/gems/run/sculpt.run#L153
> [3]
>
> https://github.com/genodelabs/genode/blob/master/repos/gems/run/sculpt.run#L631
>
> Regards,
> Norman
>
> --
> Dr.-Ing. Norman Feske
> Genode Labs
>
> https://www.genode-labs.com · https://genode.org
>
> Genode Labs GmbH · Amtsgericht Dresden · HRB 28424 · Sitz Dresden
> Geschäftsführer: Dr.-Ing. Norman Feske, Christian Helmuth
>
>
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