linux-kernel - Re: [PATCH 03/13] PCI: xilinx: Convert to MSI domains

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Date:   Mon, 22 Mar 2021 14:04:48 +0000
From:   Marc Zyngier <maz@...nel.org>
To:     Michal Simek <monstr@...str.eu>
Cc:     Lorenzo Pieralisi <lorenzo.pieralisi@....com>,
        michal.simek@...inx.com, Bjorn Helgaas <bhelgaas@...gle.com>,
        Frank Wunderlich <frank-w@...lic-files.de>,
        Thierry Reding <treding@...dia.com>,
        Thomas Gleixner <tglx@...utronix.de>,
        Rob Herring <robh@...nel.org>, Will Deacon <will@...nel.org>,
        "K. Y. Srinivasan" <kys@...rosoft.com>,
        Haiyang Zhang <haiyangz@...rosoft.com>,
        Stephen Hemminger <sthemmin@...rosoft.com>,
        Wei Liu <wei.liu@...nel.org>,
        Thierry Reding <thierry.reding@...il.com>,
        Jonathan Hunter <jonathanh@...dia.com>,
        Ryder Lee <ryder.lee@...iatek.com>,
        Marek Vasut <marek.vasut+renesas@...il.com>,
        Yoshihiro Shimoda <yoshihiro.shimoda.uh@...esas.com>,
        Paul Walmsley <paul.walmsley@...ive.com>,
        linux-pci@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, linux-hyperv@...r.kernel.org,
        linux-tegra@...r.kernel.org, linux-mediatek@...ts.infradead.org,
        linux-renesas-soc@...r.kernel.org
Subject: Re: [PATCH 03/13] PCI: xilinx: Convert to MSI domains

On Mon, 22 Mar 2021 12:33:10 +0000,
Michal Simek <monstr@...str.eu> wrote:
> 
> Hi,
> 
> On 3/22/21 1:21 PM, Lorenzo Pieralisi wrote:
> > On Thu, Feb 25, 2021 at 03:10:13PM +0000, Marc Zyngier wrote:
> >> In anticipation of the removal of the msi_controller structure, convert
> >> the ancient xilinx host controller driver to MSI domains.
> >>
> >> We end-up with the usual two domain structure, the top one being a
> >> generic PCI/MSI domain, the bottom one being xilinx-specific and handling
> >> the actual HW interrupt allocation.
> >>
> >> This allows us to fix some of the most appaling MSI programming, where
> >> the message programmed in the device is the virtual IRQ number instead
> >> of the allocated vector number. The allocator is also made safe with
> >> a mutex. This should allow support for MultiMSI, but I decided not to
> >> even try, since I cannot test it.
> >>
> >> Also take the opportunity to get rid of the cargo-culted memory allocation
> >> for the MSI capture address. *ANY* sufficiently aligned address should
> >> be good enough, so use the physical address of the xilinx_pcie_host
> >> structure instead.
> >>
> >> Signed-off-by: Marc Zyngier <maz@...nel.org>
> >> ---
> >>  drivers/pci/controller/Kconfig       |   2 +-
> >>  drivers/pci/controller/pcie-xilinx.c | 238 +++++++++++----------------
> >>  2 files changed, 96 insertions(+), 144 deletions(-)
> > 
> > Michal,
> > 
> > can you please test these changes or make sure someone does and report
> > back on the mailing list please ?
> > 
> > I would like to merge this series for v5.13.
> 
> I got just private response (not sure why) from Bharat March 5 that
> changes are fine.
> It means go ahead with it.

Can I take this as a full Tested-by tag?

Thanks,

	M.

-- 
Without deviation from the norm, progress is not possible.