From owner-freebsd-hackers@FreeBSD.ORG Tue Oct 25 21:09:02 2005 Return-Path: X-Original-To: freebsd-hackers@FreeBSD.ORG Delivered-To: freebsd-hackers@FreeBSD.ORG Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 45E5616A41F; Tue, 25 Oct 2005 21:09:02 +0000 (GMT) (envelope-from ru@ip.net.ua) Received: from tigra.ip.net.ua (tigra.ip.net.ua [82.193.96.10]) by mx1.FreeBSD.org (Postfix) with ESMTP id 7E0F643D45; Tue, 25 Oct 2005 21:09:00 +0000 (GMT) (envelope-from ru@ip.net.ua) Received: from localhost (rocky.ip.net.ua [82.193.96.2]) by tigra.ip.net.ua (8.12.11/8.12.11) with ESMTP id j9PL8mI3003059; Wed, 26 Oct 2005 00:08:48 +0300 (EEST) (envelope-from ru@ip.net.ua) Received: from tigra.ip.net.ua ([82.193.96.10]) by localhost (rocky.ipnet [82.193.96.2]) (amavisd-new, port 10024) with LMTP id 45987-04; Wed, 26 Oct 2005 00:08:45 +0300 (EEST) Received: from heffalump.ip.net.ua (heffalump.ip.net.ua [82.193.96.213]) by tigra.ip.net.ua (8.12.11/8.12.11) with ESMTP id j9PL4O8W002978 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO); Wed, 26 Oct 2005 00:04:24 +0300 (EEST) (envelope-from ru@ip.net.ua) Received: (from ru@localhost) by heffalump.ip.net.ua (8.13.4/8.13.4) id j9PL4PPU006407; Wed, 26 Oct 2005 00:04:25 +0300 (EEST) (envelope-from ru) Date: Wed, 26 Oct 2005 00:04:25 +0300 From: Ruslan Ermilov To: Dinesh Nair Message-ID: <20051025210425.GF85749@ip.net.ua> References: <435E3003.4050609@alphaque.com> <200510251327.59965.jhb@freebsd.org> <435E7D8C.90401@alphaque.com> <200510251610.53127.jhb@freebsd.org> Mime-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="fwqqG+mf3f7vyBCB" Content-Disposition: inline In-Reply-To: <200510251610.53127.jhb@freebsd.org> User-Agent: Mutt/1.5.9i X-Virus-Scanned: by amavisd-new at ip.net.ua Cc: freebsd-hackers@FreeBSD.ORG, John Baldwin Subject: Re: correct use of bus_dmamap_sync X-BeenThere: freebsd-hackers@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Technical Discussions relating to FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 25 Oct 2005 21:09:02 -0000 --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--