linux-kernel - Re: RE: [PATCH v9 0/5] Provide basic driver to control Arm R5 co-processor found on Xilinx ZynqMP

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Date:   Thu, 27 Aug 2020 13:43:35 -0500
From:   Michael Auchter <michael.auchter@...com>
To:     Ben Levinsky <BLEVINSK@...inx.com>
Cc:     "linux-remoteproc@...r.kernel.org" <linux-remoteproc@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "linux-arm-kernel@...ts.infradead.org" 
        <linux-arm-kernel@...ts.infradead.org>
Subject: Re: RE: [PATCH v9 0/5] Provide basic driver to control Arm R5 co-processor
 found on Xilinx ZynqMP

Hey Ben,

On Thu, Aug 27, 2020 at 03:34:33PM +0000, Ben Levinsky wrote:
> Hi Michael,
> 
> Thanks for comment. Maybe I missed some of the comments then? I had thought that your comments were the following and that I had answered them in the code:
> V8 3/5:
> - zynqmp_pm_set_rpu_mode: pass arg1 instead of 0 to zynqmp_pm_invoke_fn
> This should be reflected in v9 3/5
> - update kernel docs for zynqmp_pm_set_rpu_mode
> may have misunderstood the comment here. I updated the function and its comments above the function so that there is no obsolete iocl_id or arg2 mentioned
> V8 5/5:
> -  " In the event that zynqmp_r5_probe() fails before zynqmp_r5_setup_mbox()
> has run, this will be called on an uninitialized skb_queue. (Also
> obviously an issue once mailboxes are made optional again)."
> To remedy this I added logic in v9 in the zynqmp_r5_release() function so that the driver checks if a pointer field in the struct is NULL or no before discarding skb's
> 
> Were there other comments?

Yeah, there were a few others on v9, you can see the email here:

https://lore.kernel.org/linux-remoteproc/20200826161307.1064-1-ben.levinsky@xilinx.com/T/#m1b326e5f059712dd33bee1bcd47e3c0ae245055e

It looks like the first comment regarding the compilation failure due to
the lack of linux/types.h was addressed in v10, but none of the
subsequent comments; perhaps you just overlooked them?

Thanks,
 Michael

> 
> With that being said, I will make sure the R51 case is more completely covered.
> 
> Thanks
> Ben
> 
> 
> > -----Original Message-----
> > From: Michael Auchter <michael.auchter@...com>
> > Sent: Thursday, August 27, 2020 6:48 AM
> > To: Ben Levinsky <BLEVINSK@...inx.com>
> > Cc: Stefano Stabellini <stefanos@...inx.com>; Michal Simek
> > <michals@...inx.com>; devicetree@...r.kernel.org;
> > mathieu.poirier@...aro.org; Ed T. Mooring <emooring@...inx.com>; linux-
> > remoteproc@...r.kernel.org; linux-kernel@...r.kernel.org; Jiaying Liang
> > <jliang@...inx.com>; robh+dt@...nel.org; linux-arm-
> > kernel@...ts.infradead.org
> > Subject: Re: [PATCH v9 0/5] Provide basic driver to control Arm R5 co-
> > processor found on Xilinx ZynqMP
> > 
> > Hey Ben,
> > 
> > On Wed, Aug 26, 2020 at 06:58:05PM -0700, Ben Levinsky wrote:
> > > v10:
> > > - add include types.h to xlnx-zynqmp.h for compilation
> > 
> > I appreciate the quick turnaround on v10, but it looks like much of my
> > feedback on v9 went unacknowledged.
> > 
> > Most concerning is the fact that loading firmware on to R5 1 is _still_
> > broken in v10 due to the incorrect TCM banks being used.
> > 
> > Thanks,
> >  Michael
> > 
> > >
> > > Ben Levinsky (5):
> > >   firmware: xilinx: Add ZynqMP firmware ioctl enums for RPU
> > >     configuration.
> > >   firmware: xilinx: Add shutdown/wakeup APIs
> > >   firmware: xilinx: Add RPU configuration APIs
> > >   dt-bindings: remoteproc: Add documentation for ZynqMP R5 rproc
> > >     bindings
> > >   remoteproc: Add initial zynqmp R5 remoteproc driver
> > >
> > >  .../xilinx,zynqmp-r5-remoteproc.yaml          | 113 +++
> > >  drivers/firmware/xilinx/zynqmp.c              |  86 ++
> > >  drivers/remoteproc/Kconfig                    |  10 +
> > >  drivers/remoteproc/Makefile                   |   1 +
> > >  drivers/remoteproc/zynqmp_r5_remoteproc.c     | 898
> > ++++++++++++++++++
> > >  include/linux/firmware/xlnx-zynqmp.h          |  63 ++
> > >  6 files changed, 1171 insertions(+)
> > >  create mode 100644
> > Documentation/devicetree/bindings/remoteproc/xilinx,zynqmp-r5-
> > remoteproc.yaml
> > >  create mode 100644 drivers/remoteproc/zynqmp_r5_remoteproc.c
> > >
> > > --
> > > 2.17.1
> > >