On Fri, Feb 05, 2016 at 03:41:15PM -0800, David Daney wrote:
> From: David Daney <david.daney@xxxxxxxxxx>
>
> The cavium,pci-thunder-ecam devices are exactly ECAM based PCI root
> complexes. These root complexes (loosely referred to as ECAM units in
> the hardware manuals) are used to access the Thunder on-chips devices.
> They are special in that all the BARs on devices behind these root
> complexes are at fixed addresses. To handle this in a manner
> compatible with the core PCI code, we have the config access functions
> synthesize Enhanced Allocation (EA) capability entries for each BAR.
>
> Since this EA synthesis is needed for exactly one chip model, we can
> hard code some assumptions about the device topology and the
> properties of specific DEVFNs in the driver.
>
> Signed-off-by: David Daney <david.daney@xxxxxxxxxx>
> ---
> .../devicetree/bindings/pci/pci-thunder-ecam.txt | 30 ++
> drivers/pci/host/Kconfig | 7 +
> drivers/pci/host/Makefile | 1 +
> drivers/pci/host/pci-thunder-ecam.c | 358 +++++++++++++++++++++
> 4 files changed, 396 insertions(+)
> create mode 100644 Documentation/devicetree/bindings/pci/pci-thunder-ecam.txt
> create mode 100644 drivers/pci/host/pci-thunder-ecam.c
>
> diff --git a/Documentation/devicetree/bindings/pci/pci-thunder-ecam.txt b/Documentation/devicetree/bindings/pci/pci-thunder-ecam.txt
> new file mode 100644
> index 0000000..34658f2
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/pci/pci-thunder-ecam.txt
> @@ -0,0 +1,30 @@
> +* ThunderX PCI host controller for pass-1.x silicon
> +
> +Firmware-initialized PCI host controller to on-chip devices found on
> +some Cavium ThunderX processors. These devices have ECAM based config
> +access, but the BARs are all at fixed addresses. We handle the fixed
> +addresses by synthesizing Enhanced Allocation (EA) capabilities for
> +these devices.
> +
> +The properties and their meanings are identical to those described in
> +host-generic-pci.txt except as listed below.
> +
> +Properties of the host controller node that differ from
> +host-generic-pci.txt:
> +
> +- compatible : Must be "cavium,pci-host-thunder-ecam"
> +
> +Example:
> +
> + pci@84b0,00000000 {
Drop the comma, and the node name should be "pcie".
Otherwise,
Acked-by: Rob Herring <robh@xxxxxxxxxx>
> + compatible = "cavium,pci-host-thunder-ecam";
> + device_type = "pci";
> + msi-parent = <&its>;
> + msi-map = <0 &its 0x30000 0x10000>;
> + bus-range = <0 31>;
> + #size-cells = <2>;
> + #address-cells = <3>;
> + #stream-id-cells = <1>;
> + reg = <0x84b0 0x00000000 0 0x02000000>; /* Configuration space */
> + ranges = <0x03000000 0x8180 0x00000000 0x8180 0x00000000 0x80 0x00000000>; /* mem ranges */
> + };
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