Re: DMA from SCSI controller to PCI frame buffer memory.

From: Douglas Gilbert (
Date: Sat Dec 14 2002 - 21:06:54 EST

Jason wrote:
> Any recommendations on where to start hacking? Would
> it be a good idea to add O_DIRECT to a mmaped PCI space?
> The kernel should not be doing any buffering whatsoever,
> as we will be coming close to filling the pci bus up
> with transfers from direct disk->fb already. (We are
> already doing buffering on the FB card as well)

Here is a less general solution that I worked on some
time ago involving the scsi generic driver.

It worked ok for one application in the early 2.4 series.

Doug Gilbert

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