linux-kernel - Re: [PATCH v11 00/11] PCI: brcmstb: enable PCIe for STB chips

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Message-ID: <00e49acb-c659-de10-3e87-76bfd82e4a76@gmail.com>
Date:   Mon, 7 Sep 2020 11:29:06 -0700
From:   Florian Fainelli <f.fainelli@...il.com>
To:     Jim Quinlan <james.quinlan@...adcom.com>,
        Lorenzo Pieralisi <lorenzo.pieralisi@....com>
Cc:     Christoph Hellwig <hch@....de>,
        Florian Fainelli <f.fainelli@...il.com>,
        "open list:PCI NATIVE HOST BRIDGE AND ENDPOINT DRIVERS" 
        <linux-pci@...r.kernel.org>,
        Nicolas Saenz Julienne <nsaenzjulienne@...e.de>,
        Robin Murphy <robin.murphy@....com>,
        "maintainer:BROADCOM BCM7XXX ARM ARCHITECTURE" 
        <bcm-kernel-feedback-list@...adcom.com>,
        Alan Stern <stern@...land.harvard.edu>,
        Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
        Bartosz Golaszewski <bgolaszewski@...libre.com>,
        Dan Williams <dan.j.williams@...el.com>,
        "open list:STAGING SUBSYSTEM" <devel@...verdev.osuosl.org>,
        "open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE" 
        <devicetree@...r.kernel.org>,
        "open list:DRM DRIVERS FOR ALLWINNER A10" 
        <dri-devel@...ts.freedesktop.org>, Felipe Balbi <balbi@...nel.org>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        "H. Peter Anvin" <hpa@...or.com>,
        "open list:IOMMU DRIVERS" <iommu@...ts.linux-foundation.org>,
        Joerg Roedel <jroedel@...e.de>,
        Julien Grall <julien.grall@....com>,
        "open list:ACPI FOR ARM64 (ACPI/arm64)" <linux-acpi@...r.kernel.org>,
        "moderated list:ARM PORT" <linux-arm-kernel@...ts.infradead.org>,
        open list <linux-kernel@...r.kernel.org>,
        "open list:ALLWINNER A10 CSI DRIVER" <linux-media@...r.kernel.org>,
        "open list:REMOTE PROCESSOR (REMOTEPROC) SUBSYSTEM" 
        <linux-remoteproc@...r.kernel.org>,
        "moderated list:BROADCOM BCM2711/BCM2835 ARM ARCHITECTURE" 
        <linux-rpi-kernel@...ts.infradead.org>,
        "open list:SUPERH" <linux-sh@...r.kernel.org>,
        "open list:USB SUBSYSTEM" <linux-usb@...r.kernel.org>,
        "Rafael J. Wysocki" <rafael@...nel.org>,
        Rob Herring <robh@...nel.org>,
        Saravana Kannan <saravanak@...gle.com>,
        Stefano Stabellini <sstabellini@...nel.org>
Subject: Re: [PATCH v11 00/11] PCI: brcmstb: enable PCIe for STB chips



On 9/7/2020 10:43 AM, Jim Quinlan wrote:
> On Mon, Sep 7, 2020 at 5:16 AM Lorenzo Pieralisi
> <lorenzo.pieralisi@....com> wrote:
>>
>> On Thu, Aug 27, 2020 at 09:29:59AM -0400, Jim Quinlan wrote:
>>> On Thu, Aug 27, 2020 at 2:35 AM Christoph Hellwig <hch@....de> wrote:
>>>>
>>>> On Tue, Aug 25, 2020 at 10:40:27AM -0700, Florian Fainelli wrote:
>>>>> Hi,
>>>>>
>>>>> On 8/24/2020 12:30 PM, Jim Quinlan wrote:
>>>>>>
>>>>>> Patchset Summary:
>>>>>>     Enhance a PCIe host controller driver.  Because of its unusual design
>>>>>>     we are foced to change dev->dma_pfn_offset into a more general role
>>>>>>     allowing multiple offsets.  See the 'v1' notes below for more info.
>>>>>
>>>>> We are version 11 and counting, and it is not clear to me whether there is
>>>>> any chance of getting these patches reviewed and hopefully merged for the
>>>>> 5.10 merge window.
>>>>>
>>>>> There are a lot of different files being touched, so what would be the
>>>>> ideal way of routing those changes towards inclusion?
>>>>
>>>> FYI, I offered to take the dma-mapping bits through the dma-mapping tree.
>>>> I have a bit of a backlog, but plan to review and if Jim is ok with that
>>>> apply the current version.
>>> Sounds good to me.
>>
>> Hi Jim,
>>
>> is the dependency now solved ? Should we review/take this series as
>> is for v5.10 through the PCI tree ?
> Hello Lorenzo,
> 
> We are still working out a regression with the DMA offset commit on
> the RaspberryPi.  Nicolas has found the root cause and we are now
> devising a solution.

Maybe we can parallelize the PCIe driver review while the DMA changes 
are being worked on in Christoph's branch. Lorenzo, are you fine with 
the PCIe changes proper?
-- 
Florian