On Thu, 15 Nov 2012, schmitz wrote: > It should be reasonably easy if the new core ESP driver can be convinced > to send SCSI command data by programmed I/O (the old drivers set that > flag, but it has disappeared from the new core). > > > The Mac ESP driver has been ported successfully though, and that should > have suffered from the same sort of problems really. Maybe it Just Works > (tm).
The ESP core uses DMA for just about everything, but it leaves it to the low level driver to implement the actual DMA routines. The mac_esp driver uses PIO when running on 660av and 840av Macs since the DMA controller device is a mystery. mac_esp uses PDMA on the other mac models because PIO performance is lousy. I had to make a couple of changes to the esp core when implementing PIO for mac_esp but it works fine AFAIK. Finn -- To UNSUBSCRIBE, email to [email protected] with a subject of "unsubscribe". Trouble? Contact [email protected] Archive: http://lists.debian.org/[email protected]
