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From: Marc Zyngier <maz@kernel.org>
To: Mark Kettenis <mark.kettenis@xs4all.nl>
Cc: devicetree@vger.kernel.org, alyssa@rosenzweig.io,
	Mark Kettenis <kettenis@openbsd.org>,
	Thomas Gleixner <tglx@linutronix.de>,
	Rob Herring <robh+dt@kernel.org>,
	Hector Martin <marcan@marcan.st>,
	Bjorn Helgaas <bhelgaas@google.com>,
	Nicolas Saenz Julienne <nsaenz@kernel.org>,
	Jim Quinlan <jim2101024@gmail.com>,
	Florian Fainelli <f.fainelli@gmail.com>,
	bcm-kernel-feedback-list@broadcom.com,
	Daire McNamara <daire.mcnamara@microchip.com>,
	linux-kernel@vger.kernel.org,
	linux-arm-kernel@lists.infradead.org, linux-pci@vger.kernel.org,
	linux-rpi-kernel@lists.infradead.org
Subject: Re: [PATCH v4 4/4] arm64: apple: Add PCIe node
Date: Sun, 12 Sep 2021 22:30:42 +0100	[thread overview]
Message-ID: <871r5tcwhp.wl-maz@kernel.org> (raw)
In-Reply-To: <20210827171534.62380-5-mark.kettenis@xs4all.nl>

On Fri, 27 Aug 2021 18:15:29 +0100,
Mark Kettenis <mark.kettenis@xs4all.nl> wrote:
> 
> From: Mark Kettenis <kettenis@openbsd.org>
> 
> Add node corresponding to the apcie,t8103 node in the
> Apple device tree for the Mac mini (M1, 2020).
> 
> Clock references and DART (IOMMU) references are left out at the
> moment and will be added once the appropriate bindings have been
> settled upon.
> 
> Signed-off-by: Mark Kettenis <kettenis@openbsd.org>
> ---
>  arch/arm64/boot/dts/apple/t8103.dtsi | 63 ++++++++++++++++++++++++++++
>  1 file changed, 63 insertions(+)
> 
> diff --git a/arch/arm64/boot/dts/apple/t8103.dtsi b/arch/arm64/boot/dts/apple/t8103.dtsi
> index 503a76fc30e6..6e4677bdef44 100644
> --- a/arch/arm64/boot/dts/apple/t8103.dtsi
> +++ b/arch/arm64/boot/dts/apple/t8103.dtsi
> @@ -214,5 +214,68 @@ pinctrl_smc: pinctrl@23e820000 {
>  				     <AIC_IRQ 396 IRQ_TYPE_LEVEL_HIGH>,
>  				     <AIC_IRQ 397 IRQ_TYPE_LEVEL_HIGH>;
>  		};
> +
> +		pcie0: pcie@690000000 {
> +			compatible = "apple,t8103-pcie", "apple,pcie";
> +			device_type = "pci";
> +
> +			reg = <0x6 0x90000000 0x0 0x1000000>,
> +			      <0x6 0x80000000 0x0 0x4000>,

Only exposing 16kB for the 'rc' crashes the Linux driver as it tries
to configure the port ref-clock configurations, which live much
higher:

#define CORE_LANE_CFG(port)		(0x84000 + 0x4000 * (port))

Previous versions of the binding had this region as 1MB, which made
things work.

> +			      <0x6 0x81000000 0x0 0x8000>,
> +			      <0x6 0x82000000 0x0 0x8000>,
> +			      <0x6 0x83000000 0x0 0x8000>;

These used to be 16kB, and are now twice as much. Didn't cause any
issue with the Linux driver, but I wonder what trigger either change.

Thanks,

	M.

-- 
Without deviation from the norm, progress is not possible.

WARNING: multiple messages have this Message-ID
From: Marc Zyngier <maz@kernel.org>
To: Mark Kettenis <mark.kettenis@xs4all.nl>
Cc: devicetree@vger.kernel.org, alyssa@rosenzweig.io,
	Mark Kettenis <kettenis@openbsd.org>,
	Thomas Gleixner <tglx@linutronix.de>,
	Rob Herring <robh+dt@kernel.org>,
	Hector Martin <marcan@marcan.st>,
	Bjorn Helgaas <bhelgaas@google.com>,
	Nicolas Saenz Julienne <nsaenz@kernel.org>,
	Jim Quinlan <jim2101024@gmail.com>,
	Florian Fainelli <f.fainelli@gmail.com>,
	bcm-kernel-feedback-list@broadcom.com,
	Daire McNamara <daire.mcnamara@microchip.com>,
	linux-kernel@vger.kernel.org,
	linux-arm-kernel@lists.infradead.org, linux-pci@vger.kernel.org,
	linux-rpi-kernel@lists.infradead.org
Subject: Re: [PATCH v4 4/4] arm64: apple: Add PCIe node
Date: Sun, 12 Sep 2021 22:30:42 +0100	[thread overview]
Message-ID: <871r5tcwhp.wl-maz@kernel.org> (raw)
In-Reply-To: <20210827171534.62380-5-mark.kettenis@xs4all.nl>

On Fri, 27 Aug 2021 18:15:29 +0100,
Mark Kettenis <mark.kettenis@xs4all.nl> wrote:
> 
> From: Mark Kettenis <kettenis@openbsd.org>
> 
> Add node corresponding to the apcie,t8103 node in the
> Apple device tree for the Mac mini (M1, 2020).
> 
> Clock references and DART (IOMMU) references are left out at the
> moment and will be added once the appropriate bindings have been
> settled upon.
> 
> Signed-off-by: Mark Kettenis <kettenis@openbsd.org>
> ---
>  arch/arm64/boot/dts/apple/t8103.dtsi | 63 ++++++++++++++++++++++++++++
>  1 file changed, 63 insertions(+)
> 
> diff --git a/arch/arm64/boot/dts/apple/t8103.dtsi b/arch/arm64/boot/dts/apple/t8103.dtsi
> index 503a76fc30e6..6e4677bdef44 100644
> --- a/arch/arm64/boot/dts/apple/t8103.dtsi
> +++ b/arch/arm64/boot/dts/apple/t8103.dtsi
> @@ -214,5 +214,68 @@ pinctrl_smc: pinctrl@23e820000 {
>  				     <AIC_IRQ 396 IRQ_TYPE_LEVEL_HIGH>,
>  				     <AIC_IRQ 397 IRQ_TYPE_LEVEL_HIGH>;
>  		};
> +
> +		pcie0: pcie@690000000 {
> +			compatible = "apple,t8103-pcie", "apple,pcie";
> +			device_type = "pci";
> +
> +			reg = <0x6 0x90000000 0x0 0x1000000>,
> +			      <0x6 0x80000000 0x0 0x4000>,

Only exposing 16kB for the 'rc' crashes the Linux driver as it tries
to configure the port ref-clock configurations, which live much
higher:

#define CORE_LANE_CFG(port)		(0x84000 + 0x4000 * (port))

Previous versions of the binding had this region as 1MB, which made
things work.

> +			      <0x6 0x81000000 0x0 0x8000>,
> +			      <0x6 0x82000000 0x0 0x8000>,
> +			      <0x6 0x83000000 0x0 0x8000>;

These used to be 16kB, and are now twice as much. Didn't cause any
issue with the Linux driver, but I wonder what trigger either change.

Thanks,

	M.

-- 
Without deviation from the norm, progress is not possible.

_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel

  parent reply	other threads:[~2021-09-12 21:30 UTC|newest]

Thread overview: 58+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-08-27 17:15 [PATCH v4 0/4] Apple M1 PCIe DT bindings Mark Kettenis
2021-08-27 17:15 ` Mark Kettenis
2021-08-27 17:15 ` [PATCH v4 1/4] dt-bindings: interrupt-controller: Convert MSI controller to json-schema Mark Kettenis
2021-08-27 17:15   ` Mark Kettenis
2021-08-27 19:15   ` Mark Kettenis
2021-08-27 19:15     ` Mark Kettenis
2021-08-31 21:04     ` Rob Herring
2021-08-31 21:04       ` Rob Herring
2021-08-31 20:57   ` Rob Herring
2021-08-31 20:57     ` Rob Herring
2021-09-01 10:56     ` Mark Kettenis
2021-09-01 10:56       ` Mark Kettenis
2021-08-31 20:58   ` Rob Herring
2021-08-31 20:58     ` Rob Herring
2021-08-27 17:15 ` [PATCH v4 2/4] dt-bindings: interrupt-controller: msi: Add msi-ranges property Mark Kettenis
2021-08-27 17:15   ` Mark Kettenis
2021-08-31 21:16   ` Rob Herring
2021-08-31 21:16     ` Rob Herring
2021-09-21 17:52     ` Mark Kettenis
2021-09-21 17:52       ` Mark Kettenis
2021-08-27 17:15 ` [PATCH v4 3/4] dt-bindings: pci: Add DT bindings for apple,pcie Mark Kettenis
2021-08-27 17:15   ` Mark Kettenis
2021-08-27 17:58   ` Alyssa Rosenzweig
2021-08-27 17:58     ` Alyssa Rosenzweig
2021-08-27 18:22     ` Mark Kettenis
2021-08-27 18:22       ` Mark Kettenis
2021-08-31 21:21   ` Rob Herring
2021-08-31 21:21     ` Rob Herring
2021-09-01 11:29     ` Mark Kettenis
2021-09-01 11:29       ` Mark Kettenis
2021-09-12 20:13       ` Marc Zyngier
2021-09-12 20:13         ` Marc Zyngier
2021-09-13 20:55         ` Rob Herring
2021-09-13 20:55           ` Rob Herring
2021-08-27 17:15 ` [PATCH v4 4/4] arm64: apple: Add PCIe node Mark Kettenis
2021-08-27 17:15   ` Mark Kettenis
2021-08-27 17:59   ` Alyssa Rosenzweig
2021-08-27 17:59     ` Alyssa Rosenzweig
2021-08-27 18:24     ` Mark Kettenis
2021-08-27 18:24       ` Mark Kettenis
2021-08-27 20:09       ` Alyssa Rosenzweig
2021-08-27 20:09         ` Alyssa Rosenzweig
2021-08-30 11:37   ` Marc Zyngier
2021-08-30 11:37     ` Marc Zyngier
2021-08-30 14:57     ` Mark Kettenis
2021-08-30 14:57       ` Mark Kettenis
2021-08-30 20:40       ` Marc Zyngier
2021-08-30 20:40         ` Marc Zyngier
2021-08-30 15:57     ` Rob Herring
2021-08-30 15:57       ` Rob Herring
2021-08-30 20:20       ` Marc Zyngier
2021-08-30 20:20         ` Marc Zyngier
2021-09-12 21:30   ` Marc Zyngier [this message]
2021-09-12 21:30     ` Marc Zyngier
2021-09-13 18:35     ` Mark Kettenis
2021-09-13 18:35       ` Mark Kettenis
2021-09-21 11:01 ` [PATCH v4 0/4] Apple M1 PCIe DT bindings Marc Zyngier
2021-09-21 11:01   ` Marc Zyngier

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