Subject: Re: Preliminary work on ath(4)
To: None <current-users@NetBSD.org>
From: Bruce J.A. Nourish <email@example.com>
Date: 08/20/2003 10:01:44
On Wed, Aug 20, 2003 at 04:32:25PM -0700, Sam Leffler wrote:
> [****ing bus_dma stuff]
> I suggest you pick a netbsd driver and understand it.
This was the technique I used on if_ath_pci.c. Most of the PCI init code
was pulled from if_fxp_pci.c and then tweaked. The MI part of that driver
is a whole lot bigger and I didn't really fancy digging around in it, but
I guess I'll have to.
> I think you want to do away with taskqueues under netbsd. They are used to
> defer interrupt processing from the ISR to another context. I believe the
> netbsd model is to do this processing directly in the interrupt context so
> just call the taskqueue processing routine directly from ath_intr and fixup
> the logic to conform.
> Likewise ignore mutex's and think spl's instead.
Aha. I was thinking that mutex == lock. I see how I was wrong. On a
related note, is FreeBSD-current reentrant?
> In the end you're likely to have a very different driver. But when it
> works I can steal it back for use under FreeBSD -stable! :)
:-) Thanks for your help!
Bruce J.A. Nourish <bjan+JUNK@bjan.net>