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

[Douglas Gilbert]

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)

Jason,
Here is a less general solution that I worked on some
time ago involving the scsi generic driver.
   http://www.torque.net/sg/mem2disk.html

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

Doug Gilbert