Subject: Re: pciide performance on alpha
To: Matt Thomas <>
From: Manuel Bouyer <>
List: port-alpha
Date: 08/26/1999 10:47:40
I think I found where the problem is with the cypress. I didn't read the
doc carefuly enouth, and the DMA modes were not set (so it was using DMA
mode 0). By the way, DMA mode config registers are in isa space, not pci space.
Why did they do this this way ? Bah !

Could you try the new sources I've put in ?

Also, it seems that the second channel support DMA as well, in fact.
But this needs passing bus_space tag from one pci device to another
I don't know how to do that yet (I'm going to ask on tech-kern).

Manuel Bouyer, LIP6, Universite Paris VI.