Date: Tue, 10 Dec 2002 16:05:55 -0500 (EST) From: Robert Watson <rwatson@FreeBSD.ORG> To: Andrew Gallatin <gallatin@cs.duke.edu> Cc: alpha@FreeBSD.ORG Subject: Re: cvs commit: www/en/projects/busdma index.sgml style.css (fwd) Message-ID: <Pine.NEB.3.96L.1021210160511.62186P-100000@fledge.watson.org> In-Reply-To: <15862.22081.436375.524026@grasshopper.cs.duke.edu>
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On Tue, 10 Dec 2002, Andrew Gallatin wrote: > > > I'd be happy to help anybody interested in this task, but I feel > > > reluctant to take it on myself due to time commitments at my day job. > > > > > > FWIW, some of this is fresh in my mind, as I was recently fooling around > > > with expanding the direct map on miatas. This is a no-go, due to where > > > the SRM places the memory space for the PCI devices in the system. (just > > > past 2GB). > > > > Hmm. So it sounds like the minimal code to make busdma "work" is there, > > but that until we have interface drivers, it's hard to know whether it > > actually will work, and that the busdma code could generally use some > > As I said before, some (all?) scsi drivers use it. Isa devices which > work on alpha use it. It works for the older raw bus_dmamap_load. Its > the mbuf interface which is untested. Sorry, I should have been more specific -- that's what I meant. Do you know if the _uio loading interface works? > > improvement to better support large memory systems. Do you mind if I set > > you as the task owner on the busdma page for making sure alpha busdma is > > up to spec? I'd like to make sure all this stuff is in line for 5.1, if > > we can. > > Depends what you mean by "up to spec". If you mean making sure the mbuf > interface works, then yes. If you mean making large memory machine work > well, then no. "up to spec" in the sense that network interface drivers will continue to work as they are converted. Robert N M Watson FreeBSD Core Team, TrustedBSD Projects robert@fledge.watson.org Network Associates Laboratories To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-alpha" in the body of the message
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