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From:   Dan Williams <dan.j.williams@intel.com>
Date:   Tue, 7 Dec 2021 15:09:28 -0800
Message-ID: <CAPcyv4gS8fxx_QP43ShhLysRgy0XH-4KS_e3WO56k6gNMQqaJA@mail.gmail.com>
Subject: Re: [PATCH v3 03/18] driver core: platform: Rename platform_dma_configure()
To:     Jason Gunthorpe <jgg@nvidia.com>
Cc:     Christoph Hellwig <hch@infradead.org>,
        Stuart Yoder <stuyoder@gmail.com>,
        "Rafael J. Wysocki" <rafael@kernel.org>,
        David Airlie <airlied@linux.ie>,
        Linux PCI <linux-pci@vger.kernel.org>,
        Thierry Reding <thierry.reding@gmail.com>,
        Diana Craciun <diana.craciun@oss.nxp.com>,
        Dmitry Osipenko <digetx@gmail.com>,
        Will Deacon <will@kernel.org>, Ashok Raj <ashok.raj@intel.com>,
        Jonathan Hunter <jonathanh@nvidia.com>,
        Kevin Tian <kevin.tian@intel.com>,
        Chaitanya Kulkarni <kch@nvidia.com>,
        Alex Williamson <alex.williamson@redhat.com>,
        KVM list <kvm@vger.kernel.org>,
        Bjorn Helgaas <bhelgaas@google.com>,
        Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        Cornelia Huck <cohuck@redhat.com>,
        Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
        Li Yang <leoyang.li@nxp.com>,
        "open list:DMA MAPPING HELPERS" <iommu@lists.linux-foundation.org>,
        Jacob jun Pan <jacob.jun.pan@intel.com>,
        Daniel Vetter <daniel@ffwll.ch>,
        Robin Murphy <robin.murphy@arm.com>
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On Mon, Dec 6, 2021 at 7:04 AM Jason Gunthorpe <jgg@nvidia.com> wrote:
>
> On Mon, Dec 06, 2021 at 06:47:45AM -0800, Christoph Hellwig wrote:
> > On Mon, Dec 06, 2021 at 10:45:35AM -0400, Jason Gunthorpe via iommu wrote:
> > > IIRC the only thing this function does is touch ACPI and OF stuff?
> > > Isn't that firmware?
> > >
> > > AFAICT amba uses this because AMBA devices might be linked to DT
> > > descriptions?
> >
> > But DT descriptions aren't firmware.  They are usually either passed onb
> > the bootloader or in some deeply embedded setups embedded into the
> > kernel image.
>
> Pedenatically yes, but do you know of a common word to refer to both
> OF and ACPI that is better than firmware? :)
>
> AFAICT we already use firwmare for this in a few places, eg
> fwnode_handle and so on.

I've always thought 'platform' was the generic name for otherwise
non-enumerable platform-firmware/data things enumerated by ACPI / OF.