On Mon, Dec 10, 2001 at 08:52:26PM +0100, Benjamin Herrenschmidt wrote: > ... > Some chipsets (and the original agpgart supported those only) can > let the CPU access the AGP aperture directly. All mmap had to do > was then to map the user pages to the aperture physical pages, > if they had memory bound or not didn't matter.
waitamint... I just read http://developer.intel.com/design/intarch/techinfo/440BX/addrmap.htm which describes the AGP Graphics Aperture, as the "AGP Dram Graphics Aperture". Which means 'A way for the AGP device to access main RAM'. All this time I thought it was a way for programs to access the RAM on-board the card! Well that clears things up a bit :-/ But... isnt there a straightforward mmap type way to access the RAM on board the card, then? Or is it usually "load the data to the aperture, then copy it into card-local RAM from there" ? [or via the "drmDMA" stuff, I suppose?] _______________________________________________ Dri-devel mailing list [EMAIL PROTECTED] https://lists.sourceforge.net/lists/listinfo/dri-devel
