From: Wu Hao <hao.wu@intel.com>
To: Scott Wood <swood@redhat.com>
Cc: Alan Tull <atull@kernel.org>, Moritz Fischer <mdf@kernel.org>,
linux-fpga@vger.kernel.org,
linux-kernel <linux-kernel@vger.kernel.org>,
linux-api@vger.kernel.org,
Ananda Ravuri <ananda.ravuri@intel.com>,
Xu Yilun <yilun.xu@intel.com>
Subject: Re: [PATCH 03/17] fpga: dfl: fme: support 512bit data width PR
Date: Wed, 27 Mar 2019 14:03:34 +0800 [thread overview]
Message-ID: <20190327060334.GA13084@hao-dev> (raw)
In-Reply-To: <29827fcdcdd4fb46b680a6bd184b44fca638666e.camel@redhat.com>
On Wed, Mar 27, 2019 at 01:10:31AM -0500, Scott Wood wrote:
> On Wed, 2019-03-27 at 12:37 +0800, Wu Hao wrote:
> > On Tue, Mar 26, 2019 at 04:22:34PM -0500, Scott Wood wrote:
> > > On Tue, 2019-03-26 at 14:33 -0500, Alan Tull wrote:
> > > > On Mon, Mar 25, 2019 at 5:58 PM Scott Wood <swood@redhat.com> wrote:
> > > > > >
> > > > Hi Scott,
> > > >
> > > > > On Mon, 2019-03-25 at 17:53 -0500, Scott Wood wrote:
> > > > > > On Mon, 2019-03-25 at 11:07 +0800, Wu Hao wrote:
> > > > > > > +#else
> > > > > > > +static inline void copy512(void *src, void __iomem *dst)
> > > > > > > +{
> > > > > > > + WARN_ON_ONCE(1);
> > > > > > > +}
> > > > > > > +#endif
> > > > > >
> Likewise, this will be called if a revision 2 device is used on non-
> > > > > > x86
> > > > > > (or on x86 with an old binutils). The driver should fall back to
> > > > > > 32-
> > > > > > bit
> > > > > > in such cases.
> >
> > Unfortunately revision 2 is only for integrated FPGA solution, and it
> > doesn't
> > support any fallback solution (original 32bit data partial reconfiguration
> > is
> > not supported any more), so driver has to WARN in such path.
>
> >From the commit message it seemed like this was just an optimization, not
> something necessary to support revision 2.
>
> If there's no way to program the device without AVX512, then printing an
> error message and returning an error to userspace would be better than
> WARN_ON, since it's not actually a kernel bug.
Fair enough. Will do. Thanks for the suggestion.
Hao
>
> -Scott
>
next prev parent reply other threads:[~2019-03-27 6:03 UTC|newest]
Thread overview: 62+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-03-25 3:07 [PATCH 00/17] add new features for FPGA DFL drivers Wu Hao
2019-03-25 3:07 ` [PATCH 01/17] fpga: dfl-fme-mgr: fix FME_PR_INTFC_ID register address Wu Hao
2019-03-25 17:28 ` Alan Tull
2019-04-01 19:54 ` Moritz Fischer
2019-04-02 4:38 ` Wu Hao
2019-04-02 13:33 ` Moritz Fischer
2019-03-25 3:07 ` [PATCH 02/17] fpga: dfl: fme: align PR buffer size per PR datawidth Wu Hao
2019-03-25 17:50 ` Alan Tull
2019-03-26 0:28 ` Wu Hao
2019-03-28 18:50 ` Alan Tull
2019-03-25 3:07 ` [PATCH 03/17] fpga: dfl: fme: support 512bit data width PR Wu Hao
2019-03-25 18:48 ` Alan Tull
2019-03-25 22:53 ` Scott Wood
2019-03-25 22:58 ` Scott Wood
2019-03-26 19:33 ` Alan Tull
2019-03-26 21:22 ` Scott Wood
2019-03-27 4:37 ` Wu Hao
2019-03-27 6:10 ` Scott Wood
2019-03-27 6:03 ` Wu Hao [this message]
2019-03-27 5:10 ` Wu Hao
2019-03-27 6:19 ` Scott Wood
2019-03-27 7:10 ` Wu Hao
2019-03-27 5:46 ` Wu Hao
2019-03-25 3:07 ` [PATCH 04/17] Documentation: fpga: dfl: add descriptions for virtualization and new interfaces Wu Hao
2019-03-25 3:07 ` [PATCH 05/17] fpga: dfl: fme: add DFL_FPGA_FME_PORT_RELEASE/ASSIGN ioctl support Wu Hao
2019-03-28 22:03 ` Alan Tull
2019-03-25 3:07 ` [PATCH 06/17] fpga: dfl: pci: enable SRIOV support Wu Hao
2019-03-28 22:03 ` Alan Tull
2019-03-25 3:07 ` [PATCH 07/17] fpga: dfl: afu: add AFU state related sysfs interfaces Wu Hao
2019-03-28 17:13 ` Alan Tull
2019-03-25 3:07 ` [PATCH 08/17] fpga: dfl: afu: add userclock " Wu Hao
2019-04-01 21:41 ` Alan Tull
2019-03-25 3:07 ` [PATCH 09/17] fpga: dfl: add id_table for dfl private feature driver Wu Hao
2019-04-02 15:09 ` Moritz Fischer
2019-04-11 20:55 ` Alan Tull
2019-03-25 3:07 ` [PATCH 10/17] fpga: dfl: afu: export __port_enable/disable function Wu Hao
2019-04-02 15:50 ` Moritz Fischer
2019-04-11 20:45 ` Alan Tull
2019-03-25 3:07 ` [PATCH 11/17] fpga: dfl: afu: add error reporting support Wu Hao
2019-04-09 20:57 ` Alan Tull
2019-04-10 1:43 ` Wu Hao
2019-03-25 3:07 ` [PATCH 12/17] fpga: dfl: afu: add STP (SignalTap) support Wu Hao
2019-04-02 15:07 ` Moritz Fischer
2019-04-11 20:41 ` Alan Tull
2019-03-25 3:07 ` [PATCH 13/17] fpga: dfl: fme: add capability sysfs interfaces Wu Hao
2019-04-09 21:05 ` Alan Tull
2019-03-25 3:07 ` [PATCH 14/17] fpga: dfl: fme: add thermal management support Wu Hao
2019-04-02 14:59 ` Moritz Fischer
2019-04-03 16:31 ` Wu Hao
2019-04-03 18:09 ` Moritz Fischer
2019-04-03 23:43 ` Wu Hao
2019-03-25 3:07 ` [PATCH 15/17] fpga: dfl: fme: add power " Wu Hao
2019-04-11 20:07 ` Alan Tull
2019-04-12 2:50 ` Wu Hao
2019-04-15 21:17 ` Alan Tull
2019-04-17 7:36 ` Wu Hao
2019-04-12 21:05 ` Moritz Fischer
2019-04-17 7:31 ` Wu Hao
2019-03-25 3:07 ` [PATCH 16/17] fpga: dfl: fme: add global error reporting support Wu Hao
2019-04-09 21:35 ` Alan Tull
2019-04-10 1:34 ` Wu Hao
2019-03-25 3:07 ` [PATCH 17/17] fpga: dfl: fme: add performance " Wu Hao
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