Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932203AbWBFQkE (ORCPT ); Mon, 6 Feb 2006 11:40:04 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S932205AbWBFQkE (ORCPT ); Mon, 6 Feb 2006 11:40:04 -0500 Received: from xenotime.net ([66.160.160.81]:61077 "HELO xenotime.net") by vger.kernel.org with SMTP id S932203AbWBFQkC (ORCPT ); Mon, 6 Feb 2006 11:40:02 -0500 Date: Mon, 6 Feb 2006 08:39:58 -0800 (PST) From: "Randy.Dunlap" X-X-Sender: rddunlap@shark.he.net To: Ed Sweetman cc: "Randy.Dunlap" , Alan Cox , linux-kernel@vger.kernel.org, akpm@osdl.org Subject: Re: 2.6.16-rc1-mm2 pata driver confusion In-Reply-To: <43E3D103.70505@comcast.net> Message-ID: References: <43E3D103.70505@comcast.net> MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 5797 Lines: 140 On Fri, 3 Feb 2006, Ed Sweetman wrote: > > Still using mm kernels here, now on 2.6.16-rc1-mm5. Still no atapi > device detection - much less function - when using the libata pata amd > driver for the nvidia Nforce4 chipset. I tried, libata.atapi_enabled=1 > and just atapi_enabled=1 in the boot args and nothing was mentioned > about atapi devices in dmesg. > > Is it a known issue with the pata libata drivers that atapi isn't > working yet? ... all i've seen is people with sata atapi devices > chiming in. Agreeing with your paragraph above. I tested my SATA ATAPI CD/DVD drive with libata/PATA (ata_piix controller driver) and could not see the CD/DVD drive. > >On Maw, 2006-01-24 at 01:43 -0500, Ed Sweetman wrote: > > > > > > > > > >>problem. The problem is that there appears to be two nvidia/amd ata > >>drivers and I'm unsure which I should try using, if i compile both in, > >>which get loaded first (i assume scsi is second to ide) and if i want my > >>pata disks loaded under the new libata drivers, will my cdrom work under > >>them too, or do i still need some sort of regular ide drivers loaded > >>just for cdrom (to use native ata mode for recording access). > > >>>The goal of the drivers/scsi/pata_* drivers is to replace drivers/ide in > >its entirity with code using the newer and cleaner libata logic. There > >is still much to do but my SIL680, SiS, Intel MPIIX, AMD and VIA boxes > >are using libata and the additional patch patches still queued > >>> > >>>1. Atapi is most definitely not supported by libata, right now. > > >>>It works in the -mm tree. > >>> > >Intriguing, when I had no ide chipset compiled in kernel, only libata > >drivers, I got no mention at all about my dvd writer. I even had the > >scsi cd driver installed and generic devices, still nothing seemed to > >initialize the dvd drive. It detected the second pata bus but no > >devices attached to it. > > >this is using the kernel mentioned in the subject header. > >2.6.16-rc1-mm2. using the amd/nvidia drivers for pata and sata. > > >Is there anything i can do to give more info to the list to figure out > >why my atapi writer is being ignored by pata even when there are no ide > >drivers loaded? > > > > > >>>>>Currently you need to use libata.atapi_enabled=1 > >>>>>(assuming that libata is in the kernel image, not a loadable module). > >>>>I just built/tested this also, working for me as well. > >>>>>(hard drives, not ATAPI) > >>> > >>>I assume libata.atapi_enabled=1 is a boot arg, not some structure member > >>>>in the source for the pata driver that i need to set to 1, correct? > >> > >Yes, it's a kernel boot option if libata is in the kernel image. > >>>If libata is a loadable module, just use something like > >>> modprobe libata atapi_enabled=1 > > >>> > >And you just built and tested it, how did you test if the atapi argument > >>>>worked when you then say "not ATAPI" as something you tested? > >> > >Sorry, I mean that I built and booted a kernel with libata/PATA > >>>hard drive (vs. legacy drivers/ide/ PATA support). I have not > >>>tested ATAPI at all and didn't mean to imply that I had. > >I reported on libata.atapi_enabled=1 based on documentation > >>>and other emails that I have read. > > >>> > >In any case, i'll try out libata.atapi_enabled=1 and see if it detects > >>>>the dvd drive. > >> > >HTH. Please continue to post any questions or problems. > > >>> > >>I Rebooted several times, both setting the option in the kernel boot > >>args and editing the source to have it set by default. No atapi devices > >>are found/mentioned or even described as not found in dmesg/bootup. So > >>apparently, on my chipset, the amd/nvidia pata driver is not detecting > >>atapi devices. > >> > >>0000:00:06.0 IDE interface: nVidia Corporation CK804 IDE (rev f2) > >>0000:00:07.0 IDE interface: nVidia Corporation CK804 Serial ATA > >>Controller (rev f3) > >>0000:00:08.0 IDE interface: nVidia Corporation CK804 Serial ATA > >>Controller (rev f3) > >> > >>0000:00:06.0 IDE interface: nVidia Corporation CK804 IDE (rev f2) > >>(prog-if 8a [Master SecP PriP]) > >> Subsystem: Unknown device f043:815a > >> Flags: bus master, 66MHz, fast devsel, latency 0 > >> I/O ports at f000 [size=16] > >> Capabilities: [44] Power Management version 2 > >the atapi device in question is a plextor px-712A, it's the only device > >>on the secondary channel. > >> > >> > > > >And this is with using only ATA (libata) drivers in drivers/scsi/ > >and not ATA drivers in drivers/ide/, right? > > > >Hm. I guess we treat this as a bug report for NV ATA/ATAPI then. > > > >I just tested my system with a Plextor PX-712SA drive plus > >booting with libata.atapi_enabled=1 and the driver (not nv) > >sees the ATAPI drive and can read it. > > > > > > > >Indeed, this is with only libata. I had scsi disk driver and cdrom > >driver compiled in as well, because i assumed that the "low level" > >libata drivers required those scsi interfaces to access the disks and > >atapi devices that are found by libata. ide isn't even compiled in. > > > >Like i said, i booted with libata.atapi_enabled=1 and that produced > >nothing about cdroms/atapi devices and then I simply set the variable > >to 1 in source and recompiled and booted and same problem. > > >my board is an Asus A8N-E and my plextor is on the PATA controller, not > >the SATA like yours. Perhaps mine would work too if it was sata, but > >it appears that the pata driver has no provisions for atapi devices >yet. > > > -- ~Randy - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/