Re: Intel QAT 8970 accel card on ARM Ampere Server

[Patrick Robb <probb@iol.unh.edu>]

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quick update:

I could bind the QAT VFs to vfio-pci after using the module loading options
Dharmik mentioned.

First I tested SYM QAT pmd from dpdk test on the VF and got:

 + Tests Total :       751
 + Tests Skipped :     257
 + Tests Executed :    659
 + Tests Unsupported:   0
 + Tests Passed :      494
 + Tests Failed :       0
 + ------------------------------------------------------- +
Test OK

I can try the crypto performance DTS testsuite next. Let me know if you
have any thoughts.



On Tue, Feb 27, 2024 at 8:51 AM Honnappa Nagarahalli <
Honnappa.Nagarahalli@arm.com> wrote:

> + Paul, Wathsala
>
> > On Feb 27, 2024, at 12:58 AM, Patrick Robb <probb@iol.unh.edu> wrote:
> >
> >
> >
> > On Tue, Nov 14, 2023 at 2:35 AM Ruifeng Wang <Ruifeng.Wang@arm.com>
> wrote:
> > Hi Patrick,
> >  It seems kernel v5.15 has a defect on this. A similar issue was fixed
> by commit:
> > 40da865381ad ("crypto: qat - remove unneeded packed attribute")
> >  Could you patch the kernel and try again?
> >
> https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=40da865381ad061ab75a7a9da469ed4e623bdfeb
> >  Thanks,
> > Ruifeng
> >
> > Hi Ruifeng,
> >
> > Sorry for the delay on this - there has been a work item backlog at the
> Community Lab we've been working through.
> >
> > I did rebuild the patch today with these changes from the commit (or
> similar, as the commit above was for the qat_common file in a different
> state, but I tried to remain as true to the commit as possible).
> >
> > And that does seem to have resolved the seg fault problem! Thank you so
> much for picking this commit out of obscurity and sending it our way!
> >
> > root@arm-ampere-dut:~# echo 16 >
> /sys/bus/pci/drivers/c6xx/0000:03:00.0/sriov_numvfs
> > root@arm-ampere-dut:~# cat
> /sys/bus/pci/drivers/c6xx/0000:03:00.0/sriov_numvfs
> > 16
> >
> > Wunderbar!
> >
> > The only other thing I changed (just because I was floating the idea
> with Dharmik before) was in the kernel .config I changed the qat_c62x and
> qat_c62xvf modules from statically built in (=y) to loadable (=m). Of
> course, this should not matter, and I presume the change in behavior
> relates to those brought in from the commit above. I just want to present
> fully all changes made so there is a complete picture.
> >
> > I will continue on this tomorrow according to where this conversation
> left off, and try to move this quickly. If indeed there are no more
> blockers I think we are very close. As a reminder, when standing up a new
> testing plan, we want to make sure at least 1 rep from each vendor has SSH
> access and can remotely login to help with system tuning, troubleshooting,
> etc. for the testbed and test plan. Who would be the best person from ARM
> for this at this time, given the context on QAT testing? Ruifeng? Dharmik?
> Someone else?
> >
> > Thanks, I'll keep yall apprised of the situation.
> >
>
>

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