Hi Zoltan,
On 15/08/07, Zoltan Boszormenyi <zboszor@xxxxxxxxxx> wrote:
> Hi,
>
> I noticed that a bad CD of mine makes DMA disabled:
>
> hda: selected mode 0x44
> hda: cdrom_decode_status: status=0x51 { DriveReady SeekComplete Error }
> hda: cdrom_decode_status: error=0x40 { LastFailedSense=0x04 }
> ide: failed opcode was: unknown
> hda: cdrom_decode_status: status=0x51 { DriveReady SeekComplete Error }
> hda: cdrom_decode_status: error=0x40 { LastFailedSense=0x04 }
> ide: failed opcode was: unknown
> hda: cdrom_decode_status: status=0x51 { DriveReady SeekComplete Error }
> hda: cdrom_decode_status: error=0x40 { LastFailedSense=0x04 }
> ide: failed opcode was: unknown
> hda: cdrom_decode_status: status=0x51 { DriveReady SeekComplete Error }
> hda: cdrom_decode_status: error=0x40 { LastFailedSense=0x04 }
> ide: failed opcode was: unknown
> hda: DMA disabled
> hda: ide_intr: huh? expected NULL handler on exit
> hda: ATAPI reset complete
>
> Every time I put the said CD into to drive and DMA is on, I get the
> above messages.
This might be intended.
> Two things are interesting: first, it gets mounted correctly and
> readable and
> second, when DMA was already disabled no such messages occur in the logs.
> Anyhow, I would need DMA to correctly burn CDs/DVDs...
> What can I do besides manually re-enable DMA?
> All other disks I have tried behave perfectly.
> This happened on 2.6.22[-rcX], 2.6.23-rc3-git1 and 2.6.20-1.2962.fc6.
> This is on a Fedora Core 6 system. CD/DVD is using the old IDE drivers:
>
> Uniform Multi-Platform E-IDE driver Revision: 7.00alpha2
> ide: Assuming 33MHz system bus speed for PIO modes; override with idebus=xx
> NFORCE-MCP55: IDE controller at PCI slot 0000:00:04.0
> NFORCE-MCP55: chipset revision 161
> NFORCE-MCP55: not 100% native mode: will probe irqs later
> NFORCE-MCP55: BIOS didn't set cable bits correctly. Enabling workaround.
> NFORCE-MCP55: 0000:00:04.0 (rev a1) UDMA133 controller
> ide0: BM-DMA at 0xf000-0xf007, BIOS settings: hda:DMA, hdb:DMA
> Probing IDE interface ide0...
> hda: PIONEER DVD-RW DVR-111L, ATAPI CD/DVD-ROM drive
> ide0 at 0x1f0-0x1f7,0x3f6 on irq 14
> Probing IDE interface ide1...
> ide-floppy driver 0.99.newide
>
> $ cat /proc/ide/amd74xx
> ----------AMD BusMastering IDE Configuration----------------
> Driver Version: 2.13
> South Bridge: 0000:00:04.0
> Revision: IDE 0xa1
> Highest DMA rate: UDMA133
> BM-DMA base: 0xf000
> PCI clock: 33.3MHz
> -----------------------Primary IDE-------Secondary IDE------
> Prefetch Buffer: yes yes
> Post Write Buffer: yes yes
> Enabled: yes no
> Simplex only: no yes
> Cable Type: 80w 80w
> -------------------drive0----drive1----drive2----drive3-----
> Transfer Mode: PIO DMA DMA DMA
> Address Setup: 30ns 90ns 90ns 90ns
> Cmd Active: 90ns 90ns 300ns 300ns
> Cmd Recovery: 30ns 30ns 300ns 300ns
> Data Active: 90ns 330ns 330ns 330ns
> Data Recovery: 30ns 270ns 270ns 270ns
> Cycle Time: 120ns 600ns 600ns 600ns
> Transfer Rate: 16.6MB/s 3.3MB/s 3.3MB/s 3.3MB/s
>
> Best regards,
> Zoltán Böszörményi
Regards,
Michal
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