Date: Tue, 16 Sep 2003 15:22:28 +0200 From: Thomas Quinot <thomas@FreeBSD.ORG> To: Guillaume <amyfoub@videotron.ca> Cc: current@freebsd.org Subject: Re: acd0 vs cd0 (ATAPICAM) Message-ID: <20030916132228.GG52463@melusine.cuivre.fr.eu.org> In-Reply-To: <1062861719.2761.35.camel@guillaume.multiweb.ca> References: <1062861719.2761.35.camel@guillaume.multiweb.ca>
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Le 2003-09-06, Guillaume =E9crivait :
> I'm running FreeBSD 5-CURRENT (Aug. 28 2003) on a P3 733MHz, 768MB ram
> with a LG DVD-RW/DVD-RAM burner. I would like to know why ATAPICAM is so
> slow with my system.
Maybe because ATAPI/CAM does not actually enable DMA. Can you try the
following patch?
Thomas.
Index: atapi-cam.c
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D
RCS file: /home/ncvs/src/sys/dev/ata/atapi-cam.c,v
retrieving revision 1.22
diff -u -r1.22 atapi-cam.c
--- atapi-cam.c 11 Sep 2003 17:34:47 -0000 1.22
+++ atapi-cam.c 16 Sep 2003 13:20:18 -0000
@@ -227,6 +227,11 @@
2 * device_get_unit(atp->channel->dev) +
(atp->unit =3D=3D ATA_MASTER) ? 0 : 1);
atp->softc =3D (void *)scp;
+ if (atapi_dma && atp->channel->dma &&
+ (atp->param->config & ATA_DRQ_MASK) !=3D ATA_DRQ_INTR)
+ atp->setmode(atadev, ATA_DMA_MAX);
+ else
+ atp->setmode(atadev, ATA_PIO_MAX);
}
}
=20
--=20
Thomas.Quinot@Cuivre.FR.EU.ORG
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