Date: Wed, 26 Oct 2005 00:04:25 +0300 From: Ruslan Ermilov <ru@FreeBSD.ORG> To: Dinesh Nair <dinesh@alphaque.com> Cc: freebsd-hackers@FreeBSD.ORG, John Baldwin <jhb@FreeBSD.ORG> Subject: Re: correct use of bus_dmamap_sync Message-ID: <20051025210425.GF85749@ip.net.ua> In-Reply-To: <200510251610.53127.jhb@freebsd.org> References: <435E3003.4050609@alphaque.com> <200510251327.59965.jhb@freebsd.org> <435E7D8C.90401@alphaque.com> <200510251610.53127.jhb@freebsd.org>
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[-- Attachment #1 --] On Tue, Oct 25, 2005 at 04:10:52PM -0400, John Baldwin wrote: > On Tuesday 25 October 2005 02:46 pm, Dinesh Nair wrote: [...] > > > thus when you send data to your device, that is a WRITE operation (even > > > though your device is doing a DMA to read data), and when you get data > > > back from your device, that is a READ operation (even though your device > > > is doing a DMA to write the data into the buffer). > > > > thanx, the verbiage on the man page is slightly confusing with it's use of > > CPU, giving the opposite impression. > > Yes, I know. :) > Please go read the HEAD version of the manpage; it's been fixed recently to improve the description of these details. Cheers, -- Ruslan Ermilov ru@FreeBSD.org FreeBSD committer [-- Attachment #2 --] -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.2 (FreeBSD) iD8DBQFDXp3ZqRfpzJluFF4RAgxBAJ4p8RSk9Xr81pm/fhnDFfluCmnicACePG/a lPuQ8Z89sRdXWsImDCVogPQ= =Jrcd -----END PGP SIGNATURE-----help
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