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>
next in thread | previous in thread | raw e-mail | index | archive | help
--fwqqG+mf3f7vyBCB Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable 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 (ev= en > > > 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 dev= ice > > > 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. >=20 > Yes, I know. :) >=20 Please go read the HEAD version of the manpage; it's been fixed recently to improve the description of these details. Cheers, --=20 Ruslan Ermilov ru@FreeBSD.org FreeBSD committer --fwqqG+mf3f7vyBCB Content-Type: application/pgp-signature Content-Disposition: inline -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.2 (FreeBSD) iD8DBQFDXp3ZqRfpzJluFF4RAgxBAJ4p8RSk9Xr81pm/fhnDFfluCmnicACePG/a lPuQ8Z89sRdXWsImDCVogPQ= =Jrcd -----END PGP SIGNATURE----- --fwqqG+mf3f7vyBCB--
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?20051025210425.GF85749>