Messages in this thread | | | Subject | Re: DMA from SCSI controller to PCI frame buffer memory. | From | Alan Cox <> | Date | 14 Dec 2002 03:41:52 +0000 |
| |
On Fri, 2002-12-13 at 19:15, Jason Howard wrote: > Hello All, > > I am wondering if the functionality exists in the Linux kernel to DMA > from a SCSI controller directly into frame buffer memory of a PCI video > card? Is there a standard method for this (similar to sendfile) or will > it require some hacking?
In theory you can mmap the frame buffer memory, then do O_DIRECT I/O into it. In practice it will buffer (I hope it still does). One of the problems is that there are huge lists of PCI->AGP DMA errata in chipsets.
- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
| |