1.\" $NetBSD: artsata.4,v 1.4 2005/02/15 08:15:17 wiz Exp $ 2.\" 3.\" Copyright (c) 2003 Manuel Bouyer. 4.\" 5.\" Redistribution and use in source and binary forms, with or without 6.\" modification, are permitted provided that the following conditions 7.\" are met: 8.\" 1. Redistributions of source code must retain the above copyright 9.\" notice, this list of conditions and the following disclaimer. 10.\" 2. Redistributions in binary form must reproduce the above copyright 11.\" notice, this list of conditions and the following disclaimer in the 12.\" documentation and/or other materials provided with the distribution. 13.\" 3. All advertising materials mentioning features or use of this software 14.\" must display the following acknowledgement: 15.\" This product includes software developed by Manuel Bouyer. 16.\" 4. The name of the author may not be used to endorse or promote products 17.\" derived from this software without specific prior written permission. 18.\" 19.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 20.\" IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 21.\" OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 22.\" IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 23.\" INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 24.\" NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 25.\" DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 26.\" THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 27.\" INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 28.\" THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 29.\" 30.Dd February 12, 2005 31.Dt ARTSATA 4 32.Os 33.Sh NAME 34.Nm artsata 35.Nd Intel i31244 Serial ATA disk controller driver 36.Sh SYNOPSIS 37.Cd "artsata* at pci? dev ? function ? flags 0x0000" 38.Cd "options PCIIDE_I31244_DISABLEDMA" 39.Sh DESCRIPTION 40The 41.Nm 42driver supports the Intel i31244 Serial ATA and controllers, 43and provides the interface with the hardware for the 44.Xr ata 4 45driver. 46.Pp 47The 0x0002 flag forces the 48.Nm 49driver to disable DMA on chipsets for which DMA would normally be 50enabled. 51This can be used as a debugging aid, or to work around 52problems where the SATA controller is wired up to the system incorrectly. 53.Sh SEE ALSO 54.Xr ata 4 , 55.Xr atapi 4 , 56.Xr intro 4 , 57.Xr pci 4 , 58.Xr pciide 4 , 59.Xr wd 4 , 60.Xr wdc 4 61.Sh BUGS 62Early samples of the Intel i31244 Serial ATA controller revision 0 had a 63bug affecting DMA data transfers. 64Full production samples have been fixed, but have the same revision number. 65The 66.Dv PCIIDE_I31244_DISABLEDMA 67option can be used to disable DMA on the buggy revisions. 68