linux-kernel - Re: [PATCH v2 4/5] arm64: Juno: Add support for the PCIe host bridge on Juno R1

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <20151009170448.GG21629@leverpostej>
Date:	Fri, 9 Oct 2015 18:04:48 +0100
From:	Mark Rutland <mark.rutland@....com>
To:	Liviu Dudau <Liviu.Dudau@....com>
Cc:	Will Deacon <will.deacon@....com>,
	Catalin Marinas <catalin.marinas@....com>,
	Bjorn Helgaas <bhelgaas@...gle.com>,
	Linus Walleij <linus.walleij@...aro.org>,
	Robin Murphy <robin.murphy@....com>,
	Rob Herring <robh+dt@...nel.org>,
	Ian Campbell <ijc+devicetree@...lion.org.uk>,
	Kumar Gala <galak@...eaurora.org>,
	Arnd Bergmann <arnd@...db.de>, Jon Medhurst <tixy@...aro.org>,
	linux-pci <linux-pci@...r.kernel.org>,
	device-tree <devicetree@...r.kernel.org>,
	LAKML <linux-arm-kernel@...ts.infradead.org>,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v2 4/5] arm64: Juno: Add support for the PCIe host bridge
 on Juno R1

On Fri, Oct 09, 2015 at 05:57:28PM +0100, Liviu Dudau wrote:
> Juno R1 board sports a functional PCIe host bridge that is
> compliant with the SBSA standard found [1] here. With the right
> firmware that initialises the XpressRICH3 controller one can
> use the generic Host Bridge driver to use the PCIe hardware.
> 
> Signed-off-by: Liviu Dudau <Liviu.Dudau@....com>
> 
> [1] http://infocenter.arm.com/help/topic/com.arm.doc.den0029a/
> ---
>  arch/arm64/boot/dts/arm/juno-r1.dts | 20 ++++++++++++++++++++
>  1 file changed, 20 insertions(+)
> 
> diff --git a/arch/arm64/boot/dts/arm/juno-r1.dts b/arch/arm64/boot/dts/arm/juno-r1.dts
> index c627511..a702a6b 100644
> --- a/arch/arm64/boot/dts/arm/juno-r1.dts
> +++ b/arch/arm64/boot/dts/arm/juno-r1.dts
> @@ -109,7 +109,26 @@
>  
>  	#include "juno-base.dtsi"
>  
> +	pcie-controller@...00000 {
> +		compatible = "arm,juno-r1-pcie", "plda,xpressrich3", "pci-host-ecam-generic";

Judging by a PLDA press release [1], it looks like Juno uses
"XpressRICH3-AXI" [2] rather than "XpressRICH3 for ASIC" [3].

So sorry to bikeshed the name I suggested, but it's probably best to
s/plda,xpressrich3/plda,xpressrich3-axi/

With that:

Acked-by: Mark Rutland <mark.rutland@....com>

I assume that can be fixed up when picking (or prior to a pull) without
the need to repost.

> +		device_type = "pci";
> +		reg = <0 0x40000000 0 0x10000000>;	/* ECAM config space */
> +		bus-range = <0 255>;
> +		linux,pci-domain = <0>;
> +		#address-cells = <3>;
> +		#size-cells = <2>;
> +		dma-coherent;
> +		ranges = <0x01000000 0x00 0x5f800000 0x00 0x5f800000 0x0 0x00800000
> +			  0x02000000 0x00 0x50000000 0x00 0x50000000 0x0 0x08000000
> +		          0x42000000 0x40 0x00000000 0x40 0x00000000 0x1 0x00000000>;
> +		#interrupt-cells = <1>;
> +		interrupt-map-mask = <0 0 0 7>;
> +		interrupt-map = <0 0 0 1 &gic 0 0 0 136 4
> +			         0 0 0 2 &gic 0 0 0 137 4
> +				 0 0 0 3 &gic 0 0 0 138 4
> +				 0 0 0 4 &gic 0 0 0 139 4>;
> +		msi-parent = <&v2m_0>;

Minor nit for ranges and interrupt-map, but it'd be good to bracket
entries individually, for consistency with what we do elsewhere.

Thanks,
Mark.

[1] https://www.plda.com/arm-0
[2] https://www.plda.com/products/asicfpgasoc-ip/pcie-soft-ip/pcie-30-soft-ip-arm-soc/xpressrich3-axi
[3] https://www.plda.com/products/asicfpgasoc-ip/pcie-soft-ip/pcie-30-soft-ip/xpressrich3-pcie-30
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/