Re: [PATCH 1/1] fpga: m10bmc-sec: Add support for N6000

[Greg KH <gregkh@linuxfoundation.org>]

On Tue, Jan 31, 2023 at 10:58:23AM +0000, Lee Jones wrote:
> On Tue, 31 Jan 2023, Xu Yilun wrote:
> 
> > On 2023-01-31 at 09:08:35 +0000, Lee Jones wrote:
> > > On Tue, 31 Jan 2023, Xu Yilun wrote:
> > > 
> > > > From: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
> > > > 
> > > > Add support for PMCI-based flash access path and N6000 sec update
> > > > support. Access to flash staging area is different for N6000 from that
> > > > of the SPI interfaced counterparts.
> > > > 
> > > > Introduce intel_m10bmc_flash_bulk_ops to allow interface specific
> > > > differentiations for the flash access path for sec update and make
> > > > m10bmc_sec_read/write() in sec update driver to use the new operations.
> > > > The .flash_mutex serializes read/read. Flash update (erase+write) must
> > > > use ->lock/unlock_write() to prevent reads during update (reads would
> > > > timeout on setting flash MUX as BMC will prevent it).
> > > > 
> > > > Create a type specific RSU status reg handler for N6000 because the
> > > > field has moved from doorbell to auth result register.
> > > > 
> > > > If a failure is detected while altering the flash MUX, it seems safer
> > > > to try to set it back and doesn't seem harmful. Likely there are enough
> > > > troubles in that case anyway so setting it back fails too (which is
> > > > harmless sans the small extra delay) or just confirms that the value
> > > > wasn't changed.
> > > > 
> > > > Co-developed-by: Tianfei zhang <tianfei.zhang@intel.com>
> > > > Signed-off-by: Tianfei zhang <tianfei.zhang@intel.com>
> > > > Co-developed-by: Russ Weight <russell.h.weight@intel.com>
> > > > Signed-off-by: Russ Weight <russell.h.weight@intel.com>
> > > > Acked-by: Xu Yilun <yilun.xu@intel.com>
> > > > Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
> > > > Signed-off-by: Lee Jones <lee@kernel.org>
> > > > Link: https://lore.kernel.org/r/20230116100845.6153-12-ilpo.jarvinen@linux.intel.com
> > > > ---
> > > >  drivers/fpga/intel-m10-bmc-sec-update.c |  51 ++++-
> > > >  drivers/mfd/intel-m10-bmc-pmci.c        | 242 +++++++++++++++++++++++-
> > > >  include/linux/mfd/intel-m10-bmc.h       |  51 +++++
> > > >  3 files changed, 336 insertions(+), 8 deletions(-)
> > > 
> > > I'm confused, what are you trying to achieve?
> > 
> > I'm trying to submit the last patch to Greg's char-misc-next for
> > v6.3-rc1. The first 10 patches in this series have been accepted by him
> > in this cycle.
> > 
> > This is the only one patch so I just send it rather than making an extra
> > pull request.
> 
> That doesn't work with commits being routed in via multiple subsystems
> simultaneously.  You'll end up with complications due to differing
> commit SHAs.
> 
> If you really need this patch to be applied to FPGA (hint: I don't think
> it matters), then Greg will need to pull v2 [0] of the immutable topic
> branch.
> 
> However, the whole set is being routed in via (at least) MFD anyway, so
> I think we can just leave it as it is for now.
> 
> [0] https://lore.kernel.org/linux-fpga/Y9d9MmttFUqnCyCs@google.com/

Ok, I'll drop this from my review queue, but I thought I had the branch
already pulled into my tree, but who knows anymore :)

Maybe this should all just be resent after 6.3-rc1 is out as things will
be cleared up by then?

thanks,

greg k-h