I'm about to enable the vmda logic for non disk drivers. That means IDE
tape, scsi, cd and friends need updating to follow the new rules
Before it was simply:
->dma = 1 - do DMA
Some devices and a lot of upcoming ones support DMA to the host while
doing PIO to the device "Virtual DMA". That means the drivers now
need to do
DMA VDMA
0 X PIO
1 0 Issue PIO commands, set up for DMA xfers
1 1 Issue DMA commands, set up for DMA xfers
Alan
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This archive was generated by hypermail 2b29 : Tue Jan 07 2003 - 22:00:33 EST