Hi!
Our pdc ide dma controller produces dma timeouts/errors and falls back
to pio mode on our sx164 alpha:
Linux version 2.4.25 ([EMAIL PROTECTED]) (gcc version 2.95.4 20011002 (Debian
prerelease)) #4 Tue Mar 23 15:37:58 CET 2004
Booting on EB164 variation SX164 using machine vector SX164 from SRM
Major Options: EV56 LEGACY_START MAGIC_SYSRQ
..
PDC20267: IDE controller at PCI slot 00:06.0
PDC20267: chipset revision 2
PDC20267: not 100% native mode: will probe irqs later
PDC20267: ROM enabled at 0x0a080000
PDC20267: (U)DMA Burst Bit DISABLED Primary PCI Mode Secondary PCI Mode.
ide0: BM-DMA at 0x8880-0x8887, BIOS settings: hda:DMA, hdb:DMA
ide1: BM-DMA at 0x8888-0x888f, BIOS settings: hdc:DMA, hdd:DMA
hda: HDS722516VLAT80, ATA DISK drive
blk: queue fffffc0000609e70, no I/O memory limit
hdc: HDS722516VLAT80, ATA DISK drive
blk: queue fffffc000060a5d8, no I/O memory limit
ide0 at 0x88d0-0x88d7,0x88e2 on irq 27
ide1 at 0x88d8-0x88df,0x88e6 on irq 27
hda: attached ide-disk driver.
hda: host protected area => 1
hda: 321672960 sectors (164697 MB) w/7938KiB Cache, CHS=20023/255/63, UDMA(100)
hdc: attached ide-disk driver.
hdc: host protected area => 1
hdc: 321672960 sectors (164697 MB) w/7938KiB Cache, CHS=20023/255/63, UDMA(100)
...
hda: dma_intr: bad DMA status (dma_stat=76)
hda: dma_intr: status=0x50 { DriveReady SeekComplete }
hda: DMA disabled
PDC202XX: Primary channel reset.
PDC202XX: Secondary channel reset.
ide0: reset: master: error (0x00?)
Do you have any idea who can be the culprit of this? Is it possible the
our alpha is hardware sided not able to work with DMA? We have new hard
disks and new UDMA100 cables, so this shouldn't be the problem.
Thanks a lot for any suggestions to track down this problem.
Best wishes
Norbert
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Norbert Preining <preining AT logic DOT at> Technische Universität Wien
gpg DSA: 0x09C5B094 fp: 14DF 2E6C 0307 BE6D AD76 A9C0 D2BF 4AA3 09C5 B094
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