Re: [RFC PATCH 0/7] Introducing ZIO, a new I/O framework

Lars-Peter Clausen
2011-11-26T18:09:40Z

On 11/26/2011 06:30 PM, Alessandro Rubini wrote:
> This RFC patch-set introduces the ZIO framework for input/output,
> which will be used in the new series of drivers by the BE-CO-HT
> group at CERN.
>
> The use-case it is meant to cover is very fast I/O with
> hardware-provided timestamps. The first production driver we will
> support is a 100Ms/s 4-channel 14-bit ADC (developed on ohwr: see
> http://www.ohwr.org/projects/fmc-adc-100m14b4cha ). We need similar
> bandwidth on output.
>
> The synchronization engine of that FMC card and other ones is going to
> be White Rabbit (http://www.ohwr.org/projects/white-rabbit).
>
> Currently, the patch-set includes one example driver (zio-zero)
> that behaves like /dev/zero and /dev/urandom. Other drivers will
> come soon, both demo and real hardware.
>
> Slides for a tutorial on the design ideas are online here:
> http://www.ohwr.org/attachments/881/zio-111123.pdf
>
> A list of pending issues and development plans is online at:
> http://www.ohwr.org/projects/zio/wiki/Todo

You've Cc'ed the IIO mailinglist, so you know about the IIO framework. Could
you explain why you need a new framework and your devices can't be supported by
the IIO framework? After a first quick glance ZIO looks to me like a subset of IIO.

- Lars