Re: [PATCH hurd] rumpdisk: Include complete USB stack to enable mass storage driver

[Almudena Garcia]

> I have a feeling that ACPI provides a list of possible IRQs per device
> and it's up to the host to figure out a set of unconflicting configurations
> and to set them using _SRS methods.
> 
> Where can I find this info?

Check ACPI specification. Maybe the IRQ list are there. 

El lunes 26 de junio de 2023, Damien Zammit escribió:
> Hi Samuel,
> 
> On 26/6/23 02:41, Samuel Thibault wrote:
> >> This simple change allows hurd to be bootable off usb!
> > 
> > Well, yes and no :)
> > 
> > We also need /dev entries. It happens that this re-uses /dev/sd*
> > names, so we need to care about compatibility. We probably want
> > rumpdisk_device_open to forward to the kernel when 'disabled' is true.
>   
> OK
> 
> >> It is not ideal to have entire usb stack with the mass storage driver
> >> and combined with SATA, but there is no easy way to separate
> >> the usb stack into host/device yet.
> > 
> > Ok, but can't we build a separate rumpusbdisk that only has the USB
> > drivers? Each process (SATA+IDE and USB) can easily drive its own PCI
> > card.
>   
> Yes that is certainly possible, I can work on that next.
> 
> >> Caveats: USB seems to share IRQs with network device,
> >> which does not seem to work well currently.
> >> I am not sure of the status of irq sharing but it seems broken.
> > 
> > That was supposed to be working, but evil lies in the details as usual.
> > 
> 
> I have a feeling that ACPI provides a list of possible IRQs per device
> and it's up to the host to figure out a set of unconflicting configurations
> and to set them using _SRS methods.
> 
> Where can I find this info?
> 
> Damien
> 
> 
>

-- 
Enviado desde mi dispositivo Sailfish