On Mon, Apr 29, 2019 at 8:39 AM Norman Wilson <norman@oclsc.org> wrote:

> Dennis's `The UNIX I/O System' paper in Volume 2 of the 7/e
> manual is basically about how drivers work.  Is that near
> enough, possibly as augmented by Ken's `UNIX Implementation'
> paper in the same book?
>

I'm not blessed with paper versions of these, but they are in usr/doc/iosys
and usr/doc/cacm/* respectively.


> Those were my own starting point, long ago, for understanding
> how to write device drivers.  Along with existing source code
> as examples, of course, but (unlikely many who hack on device
> drivers, I'm afraid) I have always preferred to have a proper
> statement of rules, conventions, and interfaces rather than
> just reading code and guessing.
>

Yes. This is exactly what I was looking for, and I'm surprised I hadn't
thought to look here sooner. Thanks!

Warner