Call for testers: Apple ATA DMA

[Marco Trillo]

Hi Nathan,

I tested the patch on a eMac G4 "USB 2.0" (PowerMac6,4). It has an ata-3 macio cell and a Kauai controller.

acd0: DVDR <HL-DT-ST RW/DVD GCC-4481B/2.05> at ata0-master WDMA2
ad0: 38166MB <Seagate ST340015A 3.01> at ata1-master UDMA100
WARNING: WITNESS option enabled, expect reduced performance.
acd0: WARNING - SETFEATURES SET TRANSFER MODE taskqueue timeout - completing request directly
acd0: TIMEOUT - READ_BIG retrying (1 retry left)
acd0: WARNING - SETFEATURES SET TRANSFER MODE taskqueue timeout - completing request directly
acd0: TIMEOUT - READ_BIG retrying (0 retries left)
acd0: WARNING - SETFEATURES SET TRANSFER MODE taskqueue timeout - completing request directly
acd0: FAILURE - READ_BIG timed out
 ...
And then the same cycle starts again.

This looks similar to the problems Marcel reported, but in this case the Kauai controller only has one device attached, the hard disk; as the CD drive is on the ata-3 macio controller instead.

Thanks,
Marco.