Date: Mon, 22 Sep 2008 20:53:22 -0500 From: Nathan Whitehorn <nwhitehorn@freebsd.org> To: Marcel Moolenaar <xcllnt@mac.com> Cc: freebsd-ppc@FreeBSD.org Subject: Re: Call for testers: Apple ATA DMA Message-ID: <48D84C12.7070207@freebsd.org> In-Reply-To: <645CD2B8-11A0-42E8-B5F9-C04DCF21F763@mac.com> References: "b9c23c9f0809100322n1659cb36oa05acf2f13f3c7e1@mail.gmail.com" <48D389EE.9000207@FreeBSD.org> <48D3AD50.8070505@freebsd.org> <48D69679.1080701@freebsd.org> <48D7F437.1040603@FreeBSD.org> <645CD2B8-11A0-42E8-B5F9-C04DCF21F763@mac.com>
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Marcel Moolenaar wrote: > > On Sep 22, 2008, at 12:38 PM, Maxim Sobolev wrote: > >> Nathan Whitehorn wrote: >>> Nathan Whitehorn wrote: >>>> Maxim Sobolev wrote: >>>>> Nathan, >>>>> >>>>> Do you have any news regarding the patch in question? I hope you >>>>> did not give up, the lack of ATA DMA support is IMHO probably the >>>>> biggest issue for the FreeBSD on PowerMacs now. The hardware is >>>>> very attractive for SOHO applications, so that having this feature >>>>> is important. >>>> Right now, modes up to WDMA2 work. The UDMA modes cause hangs for >>>> reasons not entirely clear. I'm investigating it, but am in the >>>> Netherlands at the moment and it will have to wait until I get back. >>> I now have UDMA modes working on my Shasta controller -- there was a >>> stupid bug where I forgot to set the device to accept transfers in >>> the selected mode. Please give this patch a test: I expect that UDMA >>> modes now work everywhere. >>> http://people.freebsd.org/~nwhitehorn/apple-ata-dma.patch >> >> Nathan, >> >> The patch works here (G4 Mac Mini, 1.25GHz), however, I see some weird >> things happening in the interrupt domain. > > Interesting. My G4 Mac Mini 1.5Ghz is hanging hard: > > : > ad0: 76319MB <Seagate ST9808211A 3.07> at ata1-master UDMA100 > acd0: DVDR <MATSHITACD-RW CW-8124/DACD> at ata1-slave UDMA33 > *hang* > > Could be related... > If it is, removing the USE_DBDMA_IRQ stuff in ata_macio.c should solve it. This might solve Peter's problem too. -Nathan
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