Date: Mon, 18 Jul 2011 14:02:12 -0400 From: John Baldwin <jhb@freebsd.org> To: freebsd-stable@freebsd.org, markmc@dataabstractsolutions.com Subject: Re: disable 64-bit dma for one PCI slot only? Message-ID: <201107181402.12755.jhb@freebsd.org> In-Reply-To: <4E20BA23.13717.66C6F57@markmcconnell.iinet.com> References: <4E20BA23.13717.66C6F57@markmcconnell.iinet.com>
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On Friday, July 15, 2011 6:07:31 pm Mark McConnell wrote: > Dear folks, > > I have two LSI raid cards, one of which (SCSI 320-I) supports > 64-bit DMA when 4GB+ of DDR is present and another which > does not (SATA 150-D) . Consquently I've disabled 64-bit > addressing for amr devices. > > I would like to disable 64-bit addressing for the SATA card, but > permit it for the SCSI card. Is this possible? You'd have to hack the driver perhaps to only disable 64-bit DMA for certain PCI IDs. It probably already does this? -- John Baldwin
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