From owner-freebsd-hackers Tue Sep 7 14:37:44 1999 Delivered-To: freebsd-hackers@freebsd.org Received: from lestat.nas.nasa.gov (lestat.nas.nasa.gov [129.99.33.127]) by hub.freebsd.org (Postfix) with ESMTP id BBED514FBA for ; Tue, 7 Sep 1999 14:37:36 -0700 (PDT) (envelope-from thorpej@lestat.nas.nasa.gov) Received: from lestat (localhost [127.0.0.1]) by lestat.nas.nasa.gov (8.8.8/8.6.12) with ESMTP id OAA18714; Tue, 7 Sep 1999 14:36:00 -0700 (PDT) Message-Id: <199909072136.OAA18714@lestat.nas.nasa.gov> To: Bill Paul Cc: hackers@freebsd.org Subject: Re: Tulip device driver question Reply-To: Jason Thorpe From: Jason Thorpe Date: Tue, 07 Sep 1999 14:36:00 -0700 Sender: owner-freebsd-hackers@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.ORG On Tue, 7 Sep 1999 03:11:24 -0400 (EDT) Bill Paul wrote: > The SiS 900 only has one combined status/control word in its > descriptor structure (some of the bits mean different things depending > on whether the descriptors are in the RX ring or TX ring) instead of a > separate status and control word. The descriptors are also only 3 > longwords in size. Yes, I know. I wrote a driver for this chip for NetBSD :-) [ snip ... all the quirks ] ...I'm well aware of all of these :-) Amusingly, these are the same kinds of quirks you have to deal with for a unified *genuine DEC Tulip* driver. E.g. 21143s have internal NWAY and MII; board manufacturer gets to choose which to use. In any case, I have a single driver for NetBSD that works with both the PNIC and Winbond clones, and I'm working on support for the other clones. > And that's just the PCI devices: who knows what other oddities will > turn up once we have cardbus support. (And we will have cardbus support > some day soon, right Warner? Hello? Warner? You okay? Hm. Somebody want to > call an ambulance for Warner? Thank you. Breathe, Warner. _Breathe._ > That's better.) I think most of the Tulip-like CardBus boards use 21143s. Thankfully. AFAIK, none of the current sets of clones are designed for CardBus applications. BTW, you forgot EISA (DE-425) ... when I finish all the clone support in my unified driver, I'm going to migrate support for the genuine DEC chips, as well. -- Jason R. Thorpe To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message