Date: Thu, 28 Mar 2013 13:39:20 -0400 (EDT) From: Daniel Eischen <deischen@freebsd.org> To: Ian Lepore <ian@FreeBSD.org> Cc: Alexander Motin <mav@FreeBSD.org>, freebsd-current@FreeBSD.org, freebsd-stable@FreeBSD.org, Adrian Chadd <adrian@FreeBSD.org> Subject: Re: Any objections/comments on axing out old ATA stack? Message-ID: <Pine.GSO.4.64.1303281335260.420@sea.ntplx.net> In-Reply-To: <1364479253.36972.77.camel@revolution.hippie.lan> References: <51536306.5030907@FreeBSD.org> <CAJ-Vmon-8FaLa-=F=Z3dL85FPoRr%2Bp3kt%2Btr1fo7AkOV9hhyCA@mail.gmail.com> <5153EE86.8000801@FreeBSD.org> <1364479253.36972.77.camel@revolution.hippie.lan>
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On Thu, 28 Mar 2013, Ian Lepore wrote: > On Thu, 2013-03-28 at 09:17 +0200, Alexander Motin wrote: >> On 28.03.2013 02:43, Adrian Chadd wrote: >>> My main concern with the new stuff is that it requires CAM and that's >>> reasonably big compared to the standalone ATA code. >>> >>> It'd be nice if we could slim down the CAM stack a bit first; it makes >>> embedding it on the smaller devices really freaking painful. >> >> Are there many boards now with ATA, but without USB? But I agree, it >> should be checked. >> > > It's not necessarily what the boards have but how they're used. We use > industrial SBCs at work that have ata compact flash sockets on the board > which we do use, and usb interfaces which we don't use. > > I've never tested the new ata+cam stuff on some of these boards, most > based on Cyrix, Via, Geode, and VortexD86 chipsets. The older ata code > works, but not always very well -- for example, we usually have to set > hw.ata.ata_dma=0 for absolutely no reason we've ever been able to figure > out except that if we leave it enabled we get DMA errors and panics on > some CF cards and not on others. I have no idea whether to expect such > things to be better, worse, or no different by changing to the ata+cam > way of doing things (but I don't really have time to do extensive > testing right now either). Woa, I have to set hw.ata.ata_dma=0 also in order to get FreeBSD to boot on a PC104 board. I think ours is a Cyrix or Via also. -- DE
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