Hello Vinod/Dave, I have an old X86 system with 'Intel(R) Xeon(R) CPU X5450' which has '5000 Series Chipset'. The latest mainline IOAT driver does not work on it. Dont see /sys/class/dma getting filled up with channel details even if I manually load both dca.ko followed by ioatdma.ko drivers after the system boots. As it was working on a old distro kernel like 3.10, did a git bisect to figure out that the support was removed for older IOAT HW around August 2015 with the following commits.
commit 85596a19478da5125f3471a0c474b3f05a78e390 Author: Dave Jiang <[email protected]> Date: Tue Aug 11 08:48:10 2015 -0700 dmaengine: ioatdma: remove ioat1 specific code Cleaning up of ioat1 specific code as it is no longer supported Signed-off-by: Dave Jiang <[email protected]> Acked-by: Dan Williams <[email protected]> Signed-off-by: Vinod Koul <[email protected]> d73f277b329f46c13527c1090808421828671596 is the first bad commit commit d73f277b329f46c13527c1090808421828671596 Author: Dave Jiang <[email protected]> Date: Tue Aug 11 08:48:04 2015 -0700 dmaengine: ioatdma: deprecating and removal of old ioatdma devices Removal of any devices that are ioatdma pre-3.0. This is the first step in attempting to clean up the ioatdma driver and remove hw no longer supported. Signed-off-by: Dave Jiang <[email protected]> Acked-by: Dan Williams <[email protected]> Signed-off-by: Vinod Koul <[email protected]> I intend to use the HW with mainline kernel. Is there any work around which can make it happen ? Regards Anshuman
