On Sat, 5 Oct 2002, Paul Gear wrote:
> Here's what happens on my system on IDE initialization:
>
> VP_IDE: IDE controller on PCI bus 00 dev 89
> PCI: Hardcoded IRQ 14 for device 00:11.1
> VP_IDE: chipset revision 6
> VP_IDE: not 100% native mode: will probe irqs later
> ide: Assuming 33MHz system bus speed for PIO modes; override with idebus=xx
> VP_IDE: VIA vt8233a (rev 00) IDE UDMA133 controller on pci00:11.1
> ide0: BM-DMA at 0xfc00-0xfc07, BIOS settings: hda:DMA, hdb:pio
> ide1: BM-DMA at 0xfc08-0xfc0f, BIOS settings: hdc:DMA, hdd:DMA
> hda: MAXTOR 6L080J4, ATA DISK drive
> hdc: MAXTOR 6L080J4, ATA DISK drive
> hdd: LITEON DVD-ROM LTD163D, ATAPI CD/DVD-ROM drive
> ide0 at 0x1f0-0x1f7,0x3f6 on irq 14
> ide1 at 0x170-0x177,0x376 on irq 15
> hda: 156355584 sectors (80054 MB) w/1819KiB Cache, CHS=9732/255/63,
> UDMA(133)
> hdc: 156355584 sectors (80054 MB) w/1819KiB Cache, CHS=155114/16/63,
> UDMA(133)
> ide-floppy driver 0.99.newide
> Partition check:
> hda: hda1 hda2 hda3 hda4 < hda5 >
> hdc:hdc: dma_intr: status=0x51 { DriveReady SeekComplete Error }
> hdc: dma_intr: error=0x84 { DriveStatusError BadCRC }
> hdc: dma_intr: status=0x51 { DriveReady SeekComplete Error }
> hdc: dma_intr: error=0x84 { DriveStatusError BadCRC }
> hdc: dma_intr: status=0x51 { DriveReady SeekComplete Error }
> hdc: dma_intr: error=0x84 { DriveStatusError BadCRC }
> hdc: dma_intr: status=0x51 { DriveReady SeekComplete Error }
> hdc: dma_intr: error=0x84 { DriveStatusError BadCRC }
> ide1: reset: success
>
> The dma_intr errors and the ide reset repeat several times during
> the boot. After it's booted, all seems well (except that the DVD
> drive on hdd drags the UDMA133 HD on hdc down to 24 Mb/s instead of
> 40 Mb/s like hda).
Did DMA ever work without problems on this system, for any previous
Red Hat release, with or without my patch?
(I find it very suspicious that only the IDE channel which has two
devices on it is having DMA problems. I'd try the same things David
suggested: unplug DVD, reposition/replace IDE cable, etc...)
--
James Ralston, Information Technology
Software Engineering Institute
Carnegie Mellon University, Pittsburgh, PA, USA
