From: Rob Herring <robh@kernel.org>
To: "Lad, Prabhakar" <prabhakar.csengg@gmail.com>
Cc: Mark Rutland <mark.rutland@arm.com>,
Heiko Stuebner <heiko@sntech.de>,
Geert Uytterhoeven <geert+renesas@glider.be>,
PCI <linux-pci@vger.kernel.org>,
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Subject: Re: [v2 3/6] of: address: add support to parse PCI outbound-ranges
Date: Thu, 19 Dec 2019 17:31:29 -0600 [thread overview]
Message-ID: <20191219233129.GA5484@bogus> (raw)
In-Reply-To: <CA+V-a8uKBuVUQvkoJ9pJYX97Qy3JazTyLCy-2T35gOX77AP8vg@mail.gmail.com>
On Mon, Dec 16, 2019 at 08:49:23AM +0000, Lad, Prabhakar wrote:
> Hi Rob,
>
> Thank you for the review.
>
> On Fri, Dec 13, 2019 at 8:37 PM Rob Herring <robh+dt@kernel.org> wrote:
> >
> > On Fri, Dec 13, 2019 at 2:48 AM Lad Prabhakar
> > <prabhakar.csengg@gmail.com> wrote:
> > >
> > > From: "Lad, Prabhakar" <prabhakar.mahadev-lad.rj@bp.renesas.com>
> > >
> > > this patch adds support to parse PCI outbound-ranges, the
> > > outbound-regions are similar to pci ranges except it doesn't
> > > have pci address, below is the format for bar-ranges:
> > >
> > > outbound-ranges = <flags upper32_cpuaddr lower32_cpuaddr
> > > upper32_size lower32_size>;
> >
> > You can't just make up a new ranges property. Especially one that
> > doesn't follow how 'ranges' works. We already have 'dma-ranges' to
> > translate device to memory addresses.
> >
> > Explain the problem or feature you need, not the solution you came up
> > with. Why do you need this and other endpoint bindings haven't?
> >
> rcar SoC's supports multiple outbound region for mapping the PCI address
> locally to the system. This lead to discussion where there exist controllers
> which support regions for high/low priority transfer and similarly regions
> for large/small memory allocations, as a result a new ranges property was
> added, where we can specify the flags which would indicate how the outbound
> region can be used during requests.
What are the flags?
Rob
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next prev parent reply other threads:[~2019-12-19 23:31 UTC|newest]
Thread overview: 27+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-12-13 8:47 [v2 0/6] Add support for PCIe controller to work in endpoint mode on R-Car SoCs Lad Prabhakar
2019-12-13 8:47 ` [v2 1/6] pci: pcie-rcar: preparation for adding endpoint support Lad Prabhakar
2019-12-13 21:06 ` Bjorn Helgaas
2019-12-16 7:52 ` Lad, Prabhakar
2019-12-13 8:47 ` [v2 2/6] pci: endpoint: add support to handle features of outbound memory Lad Prabhakar
2019-12-13 21:06 ` Bjorn Helgaas
2019-12-16 8:21 ` Lad, Prabhakar
2019-12-16 11:35 ` Kishon Vijay Abraham I
2019-12-18 17:23 ` Lad, Prabhakar
2020-01-02 9:44 ` Kishon Vijay Abraham I
2020-01-02 9:59 ` Lad, Prabhakar
2019-12-13 8:47 ` [v2 3/6] of: address: add support to parse PCI outbound-ranges Lad Prabhakar
2019-12-13 15:07 ` Rob Herring
2019-12-16 8:49 ` Lad, Prabhakar
2019-12-19 23:31 ` Rob Herring [this message]
2020-01-02 8:44 ` Lad, Prabhakar
2020-01-02 22:55 ` Rob Herring
2019-12-13 21:05 ` Bjorn Helgaas
2019-12-16 8:55 ` Lad, Prabhakar
2019-12-13 8:47 ` [v2 4/6] dt-bindings: PCI: rcar: Add bindings for R-Car PCIe endpoint controller Lad Prabhakar
2019-12-19 23:35 ` Rob Herring
2020-01-02 8:47 ` Lad, Prabhakar
2020-01-03 16:29 ` Lad, Prabhakar
2019-12-13 8:47 ` [v2 5/6] pci: rcar: add support for rcar pcie controller in endpoint mode Lad Prabhakar
2019-12-13 8:47 ` [v2 6/6] misc: pci_endpoint_test: add device-id for RZ/G2E pcie controller Lad Prabhakar
2019-12-13 21:06 ` [v2 0/6] Add support for PCIe controller to work in endpoint mode on R-Car SoCs Bjorn Helgaas
2019-12-16 9:27 ` Lad, Prabhakar
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