Re: [PATCH v5 09/10] ARM: dts: msm: Add coresight components for SM8250

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Hi

On Wed, 13 Apr 2022 at 17:45, Jinlong Mao <quic_jinlmao@xxxxxxxxxxx> wrote:
>
> Hi Konrad,
>
> Thank you for the review.
>
> On 4/13/2022 5:58 PM, Konrad Dybcio wrote:
> > Hi,
> >
> >
> > I added Bjorn, the linux-arm-msm maintainer to CC as he was missing
> > for some reason.
> >
> >
> > On 12/04/2022 14:50, Mao Jinlong wrote:
> >> Add coresight device tree for sm8250. STM/ETM are added.
> >>
> >> Signed-off-by: Tao Zhang <quic_taozha@xxxxxxxxxxx>
> >> Signed-off-by: Mao Jinlong <quic_jinlmao@xxxxxxxxxxx>
> >> ---
> >>   .../arm64/boot/dts/qcom/sm8250-coresight.dtsi | 526 ++++++++++++++++++
> >>   arch/arm64/boot/dts/qcom/sm8250.dtsi          |   2 +
> >>   2 files changed, 528 insertions(+)
> >>   create mode 100644 arch/arm64/boot/dts/qcom/sm8250-coresight.dtsi
> >>
> >> diff --git a/arch/arm64/boot/dts/qcom/sm8250-coresight.dtsi
> >> b/arch/arm64/boot/dts/qcom/sm8250-coresight.dtsi
> >> new file mode 100644
> >> index 000000000000..1de42fd39248
> >> --- /dev/null
> >> +++ b/arch/arm64/boot/dts/qcom/sm8250-coresight.dtsi
> >> @@ -0,0 +1,526 @@
> >> +// SPDX-License-Identifier: GPL-2.0
> >
> > sm8250.dtsi is BSD-3-Clause. Please consider relicensing.
> >
> >
> >> +/*
> >> + * Copyright (c) 2022 Qualcomm Innovation Center, Inc. All rights
> >> reserved.
> >> + */
> >> +
> >> +&soc {
> >> +
> >> +    stm@6002000 {
> >> +        compatible = "arm,coresight-stm", "arm,primecell";
> >> +        reg = <0 0x06002000 0 0x1000>,
> >
> > You don't need to break the line at so few characters.
> >
> >
> >> +              <0 0x16280000 0 0x180000>;
> >> +        reg-names = "stm-base", "stm-stimulus-base";
> >> +
> >> +        clocks = <&aoss_qmp>;
> >> +        clock-names = "apb_pclk";
> >> +
> >> +        out-ports {
> >> +            port {
> >> +                stm_out: endpoint {
> >> +                    remote-endpoint =
> >> +                      <&funnel0_in7>;
> >
> > Same here.
> >
> >
> >> +                };
> >> +            };
> >> +        };
> >> +    };
> >> +
> >> +    funnel@6041000 {
> >> +        compatible = "arm,coresight-dynamic-funnel", "arm,primecell";
> >> +        reg = <0 0x06041000 0 0x1000>;
> >> +
> >> +        clocks = <&aoss_qmp>;
> >> +        clock-names = "apb_pclk";
> >> +
> >> +        out-ports {
> >> +            port {
> >> +                funnel0_out: endpoint {
> >> +                    remote-endpoint =
> >> +                      <&merge_funnel_in0>;
> >
> > And here.
> >
> >
> >> +                };
> >> +            };
> >> +        };
> >> +
> >> +        in-ports {
> >> +            #address-cells = <1>;
> >> +            #size-cells = <0>;
> >> +
> >> +            port@7 {
> >> +                reg = <7>;
> >> +                funnel0_in7: endpoint {
> >> +                    remote-endpoint = <&stm_out>;
> >> +                };
> >> +            };
> >> +        };
> >> +    };
> >> +
> >> +    funnel@6042000 {
> >> +        compatible = "arm,coresight-dynamic-funnel", "arm,primecell";
> >> +        reg = <0 0x06042000 0 0x1000>;
> >> +
> >> +        clocks = <&aoss_qmp>;
> >> +        clock-names = "apb_pclk";
> >> +
> >> +        out-ports {
> >> +            port {
> >> +                funnel2_out: endpoint {
> >> +                    remote-endpoint =
> >> +                      <&merge_funnel_in2>;
> >
> > And here.
> >
> >
> >> +                };
> >> +            };
> >> +        };
> >> +
> >> +        in-ports {
> >> +            #address-cells = <1>;
> >> +            #size-cells = <0>;
> >> +
> >> +            port@2 {
> >> +                reg = <4>;
> >> +                funnel2_in5: endpoint {
> >> +                    remote-endpoint =
> >> +                      <&apss_merge_funnel_out>;
> >> +                };
> >> +            };
> >> +        };
> >> +    };
> >> +
> >> +    funnel@6b04000 {
> >> +        compatible = "arm,coresight-dynamic-funnel", "arm,primecell";
> >> +        arm,primecell-periphid = <0x000bb908>;
> >> +
> >> +        reg = <0 0x6b04000 0 0x1000>;
> >> +        reg-names = "funnel-base";
> >> +
> >> +        clocks = <&aoss_qmp>;
> >> +        clock-names = "apb_pclk";
> >> +
> >> +        out-ports {
> >> +            port {
> >> +                merge_funnel_out: endpoint {
> >> +                    remote-endpoint =
> >> +                        <&etf_in>;
> > And here.
> >
> >
> >> +                };
> >> +            };
> >> +        };
> >> +
> >> +        in-ports {
> >> +            #address-cells = <1>;
> >> +            #size-cells = <0>;
> >> +
> >> +            port@7 {
> >> +                reg = <7>;
> >> +                funnel_swao_in_funnel_merg: endpoint {
> >> +                    remote-endpoint=
> >
> > And here.
> >
> >
> >> + <&funnel_merg_out_funnel_swao>;
> >> +                };
> >> +            };
> >> +        };
> >> +
> >> +    };
> >> +
> >> +    funnel@6045000 {
> >
> > The nodes are not sorted properly (by address). Please fix that.
> >
> >
> >> +        compatible = "arm,coresight-dynamic-funnel", "arm,primecell";
> >> +        reg = <0 0x06045000 0 0x1000>;
> >> +
> >> +        clocks = <&aoss_qmp>;
> >> +        clock-names = "apb_pclk";
> >> +
> >> +        out-ports {
> >> +            port {
> >> +                funnel_merg_out_funnel_swao: endpoint {
> >> +                    remote-endpoint = <&funnel_swao_in_funnel_merg>;
> >> +                };
> >> +            };
> >> +        };
> >> +
> >> +        in-ports {
> >> +            #address-cells = <1>;
> >> +            #size-cells = <0>;
> >> +
> >> +            port@1 {
> >> +                reg = <0>;
> >> +                merge_funnel_in0: endpoint {
> >> +                    remote-endpoint =
> >> +                      <&funnel0_out>;
> >> +                };
> >> +            };
> >> +
> >> +            port@2 {
> >> +                reg = <1>;
> >> +                merge_funnel_in2: endpoint {
> >> +                    remote-endpoint =
> >> +                      <&funnel2_out>;
> >> +                };
> >> +            };
> >> +        };
> >> +    };
> >> +
> >> +    replicator@6046000 {
> >> +        compatible = "arm,coresight-dynamic-replicator",
> >> "arm,primecell";
> >> +        reg = <0 0x06046000 0 0x1000>;
> >> +
> >> +
> >> +        clocks = <&aoss_qmp>;
> >> +        clock-names = "apb_pclk";
> >> +
> >> +        out-ports {
> >> +            port {
> >> +                replicator_out: endpoint {
> >> +                    remote-endpoint = <&etr_in>;
> >> +                };
> >> +            };
> >> +        };
> >> +
> >> +        in-ports {
> >> +            port {
> >> +                replicator_cx_in_swao_out: endpoint {
> >> +                    remote-endpoint = <&replicator_swao_out_cx_in>;
> >> +                };
> >> +            };
> >> +        };
> >> +    };
> >> +
> >> +    replicator@6b06000 {
> >> +        compatible = "arm,coresight-dynamic-replicator",
> >> "arm,primecell";
> >> +        reg = <0 0x06b06000 0 0x1000>;
> >> +
> >> +        clocks = <&aoss_qmp>;
> >> +        clock-names = "apb_pclk";
> >> +
> >> +        out-ports {
> >> +            port {
> >> +                replicator_swao_out_cx_in: endpoint {
> >> +                    remote-endpoint = <&replicator_cx_in_swao_out>;
> >> +                };
> >> +            };
> >> +        };
> >> +
> >> +        in-ports {
> >> +            port {
> >> +                replicator_in: endpoint {
> >> +                    remote-endpoint = <&etf_out>;
> >> +                };
> >> +            };
> >> +        };
> >> +    };
> >> +
> >> +    etf@6b05000 {
> >> +        compatible = "arm,coresight-tmc", "arm,primecell";
> >> +        reg = <0 0x6b05000 0 0x1000>;
> >
> > Please pad the address to 8 chars.
> >
> >
> >> +
> >> +        clocks = <&aoss_qmp>;
> >> +        clock-names = "apb_pclk";
> >> +
> >> +        out-ports {
> >> +            port {
> >> +                etf_out: endpoint {
> >> +                    remote-endpoint =
> >> +                      <&replicator_in>;
> >
> > And here.
> >
> >
> >> +                };
> >> +            };
> >> +        };
> >> +
> >> +        in-ports {
> >> +            #address-cells = <1>;
> >> +            #size-cells = <0>;
> >> +
> >> +            port@1 {
> >> +                reg = <0>;
> >> +                etf_in: endpoint {
> >> +                    remote-endpoint =
> >> +                      <&merge_funnel_out>;
> >> +                };
> >> +            };
> >> +        };
> >> +    };
> >> +
> >> +    etr@6048000 {
> >> +        compatible = "arm,coresight-tmc", "arm,primecell";
> >> +        reg = <0 0x06048000 0 0x1000>;
> >> +
> >> +        clocks = <&aoss_qmp>;
> >> +        clock-names = "apb_pclk";
> >> +        arm,scatter-gather;
> >> +
> >> +        in-ports {
> >> +            port {
> >> +                etr_in: endpoint {
> >> +                    remote-endpoint =
> >> +                      <&replicator_out>;
> >
> > And here.
> >
> >
> >> +                };
> >> +            };
> >> +        };
> >> +    };
> >> +
> >> +    etm@7040000 {
> >> +        compatible = "arm,coresight-etm4x", "arm,primecell";
> >> +        reg = <0 0x07040000 0 0x1000>;
> >> +
> >> +        cpu = <&CPU0>;
> >> +
> >> +        clocks = <&aoss_qmp>;
> >> +        clock-names = "apb_pclk";
> >> +        arm,coresight-loses-context-with-cpu;
> >> +
> >> +        out-ports {
> >> +            port {
> >> +                etm0_out: endpoint {
> >> +                    remote-endpoint =
> >> +                      <&apss_funnel_in0>;
> >
> > And here.
> >
> >
> >> +                };
> >> +            };
> >> +        };
> >> +    };
> >> +
> >> +    etm@7140000 {
> >> +        compatible = "arm,coresight-etm4x", "arm,primecell";
> >> +        reg = <0 0x07140000 0 0x1000>;
> >> +
> >> +        cpu = <&CPU1>;
> >> +
> >> +        clocks = <&aoss_qmp>;
> >> +        clock-names = "apb_pclk";
> >> +        arm,coresight-loses-context-with-cpu;
> >> +
> >> +        out-ports {
> >> +            port {
> >> +                etm1_out: endpoint {
> >> +                    remote-endpoint =
> >> +                      <&apss_funnel_in1>;
> >
> > And here.
> >
> >
> >> +                };
> >> +            };
> >> +        };
> >> +    };
> >> +
> >> +    etm@7240000 {
> >> +        compatible = "arm,coresight-etm4x", "arm,primecell";
> >> +        reg = <0 0x07240000 0 0x1000>;
> >> +
> >> +        cpu = <&CPU2>;
> >> +
> >> +        clocks = <&aoss_qmp>;
> >> +        clock-names = "apb_pclk";
> >> +        arm,coresight-loses-context-with-cpu;
> >> +
> >> +        out-ports {
> >> +            port {
> >> +                etm2_out: endpoint {
> >> +                    remote-endpoint =
> >> +                      <&apss_funnel_in2>;
> >
> > And here.
> >
> >
> >> +                };
> >> +            };
> >> +        };
> >> +    };
> >> +
> >> +    etm@7340000 {
> >> +        compatible = "arm,coresight-etm4x", "arm,primecell";
> >> +        reg = <0 0x07340000 0 0x1000>;
> >> +
> >> +        cpu = <&CPU3>;
> >> +
> >> +        clocks = <&aoss_qmp>;
> >> +        clock-names = "apb_pclk";
> >> +        arm,coresight-loses-context-with-cpu;
> >> +
> >> +        out-ports {
> >> +            port {
> >> +                etm3_out: endpoint {
> >> +                    remote-endpoint =
> >> +                      <&apss_funnel_in3>;
> >
> > And here.
> >
> >
> >> +                };
> >> +            };
> >> +        };
> >> +    };
> >> +
> >> +    etm@7440000 {
> >> +        compatible = "arm,coresight-etm4x", "arm,primecell";
> >> +        reg = <0 0x07440000 0 0x1000>;
> >> +
> >> +        cpu = <&CPU4>;
> >> +
> >> +        clocks = <&aoss_qmp>;
> >> +        clock-names = "apb_pclk";
> >> +        arm,coresight-loses-context-with-cpu;
> >> +
> >> +        out-ports {
> >> +            port {
> >> +                etm4_out: endpoint {
> >> +                    remote-endpoint =
> >> +                      <&apss_funnel_in4>;
> >
> > And here.
> >
> >
> >> +                };
> >> +            };
> >> +        };
> >> +    };
> >> +
> >> +    etm@7540000 {
> >> +        compatible = "arm,coresight-etm4x", "arm,primecell";
> >> +        reg = <0 0x07540000 0 0x1000>;
> >> +
> >> +        cpu = <&CPU5>;
> >> +
> >> +        clocks = <&aoss_qmp>;
> >> +        clock-names = "apb_pclk";
> >> +        arm,coresight-loses-context-with-cpu;
> >> +
> >> +        out-ports {
> >> +            port {
> >> +                etm5_out: endpoint {
> >> +                    remote-endpoint =
> >> +                      <&apss_funnel_in5>;
> >
> > And here.
> >
> >
> >> +                };
> >> +            };
> >> +        };
> >> +    };
> >> +
> >> +    etm@7640000 {
> >> +        compatible = "arm,coresight-etm4x", "arm,primecell";
> >> +        reg = <0 0x07640000 0 0x1000>;
> >> +
> >> +        cpu = <&CPU6>;
> >> +
> >> +        clocks = <&aoss_qmp>;
> >> +        clock-names = "apb_pclk";
> >> +        arm,coresight-loses-context-with-cpu;
> >> +
> >> +        out-ports {
> >> +            port {
> >> +                etm6_out: endpoint {
> >> +                    remote-endpoint =
> >> +                      <&apss_funnel_in6>;
> >> +                };
> >> +            };
> >> +        };
> >> +    };
> >> +
> >> +    etm@7740000 {
> >> +        compatible = "arm,coresight-etm4x", "arm,primecell";
> >> +        reg = <0 0x07740000 0 0x1000>;
> >> +
> >> +        cpu = <&CPU7>;
> >> +
> >> +        clocks = <&aoss_qmp>;
> >> +        clock-names = "apb_pclk";
> >> +        arm,coresight-loses-context-with-cpu;
> >> +
> >> +        out-ports {
> >> +            port {
> >> +                etm7_out: endpoint {
> >> +                    remote-endpoint =
> >> +                      <&apss_funnel_in7>;
> >
> > And here.
> >
> >
> >> +                };
> >> +            };
> >> +        };
> >> +    };
> >> +
> >> +    funnel@7800000 {
> >> +        compatible = "arm,coresight-dynamic-funnel", "arm,primecell";
> >> +        reg = <0 0x07800000 0 0x1000>;
> >> +
> >> +        clocks = <&aoss_qmp>;
> >> +        clock-names = "apb_pclk";
> >> +
> >> +        out-ports {
> >> +            port {
> >> +                apss_funnel_out: endpoint {
> >> +                    remote-endpoint =
> >> +                      <&apss_merge_funnel_in>;
> >
> > And here.
> >
> >
> >> +                };
> >> +            };
> >> +        };
> >> +
> >> +        in-ports {
> >> +            #address-cells = <1>;
> >> +            #size-cells = <0>;
> >> +
> >> +            port@0 {
> >> +                reg = <0>;
> >> +                apss_funnel_in0: endpoint {
> >> +                    remote-endpoint =
> >> +                      <&etm0_out>;
> >
> > And here.
> >
> >
> >> +                };
> >> +            };
> >> +
> >> +            port@1 {
> >> +                reg = <1>;
> >> +                apss_funnel_in1: endpoint {
> >> +                    remote-endpoint =
> >> +                      <&etm1_out>;
> >
> > And here.
> >
> >
> >> +                };
> >> +            };
> >> +
> >> +            port@2 {
> >> +                reg = <2>;
> >> +                apss_funnel_in2: endpoint {
> >> +                    remote-endpoint =
> >> +                      <&etm2_out>;
> >
> > And here.
> >
> >
> >> +                };
> >> +            };
> >> +
> >> +            port@3 {
> >> +                reg = <3>;
> >> +                apss_funnel_in3: endpoint {
> >> +                    remote-endpoint =
> >> +                      <&etm3_out>;
> >
> > And here.
> >
> >
> >> +                };
> >> +            };
> >> +
> >> +            port@4 {
> >> +                reg = <4>;
> >> +                apss_funnel_in4: endpoint {
> >> +                    remote-endpoint =
> >> +                      <&etm4_out>;
> >
> > And here.
> >
> >
> >> +                };
> >> +            };
> >> +
> >> +            port@5 {
> >> +                reg = <5>;
> >> +                apss_funnel_in5: endpoint {
> >> +                    remote-endpoint =
> >> +                      <&etm5_out>;
> >
> > And here.
> >
> >
> >> +                };
> >> +            };
> >> +
> >> +            port@6 {
> >> +                reg = <6>;
> >> +                apss_funnel_in6: endpoint {
> >> +                    remote-endpoint =
> >> +                      <&etm6_out>;
> >
> > And here.
> >
> >
> >> +                };
> >> +            };
> >> +
> >> +            port@7 {
> >> +                reg = <7>;
> >> +                apss_funnel_in7: endpoint {
> >> +                    remote-endpoint =
> >> +                      <&etm7_out>;
> >
> > And here.
> >
> >
> >> +                };
> >> +            };
> >> +        };
> >> +    };
> >> +
> >> +    funnel@7810000 {
> >> +        compatible = "arm,coresight-dynamic-funnel", "arm,primecell";
> >> +        reg = <0 0x07810000 0 0x1000>;
> >> +
> >> +        clocks = <&aoss_qmp>;
> >> +        clock-names = "apb_pclk";
> >> +
> >> +        out-ports {
> >> +            port {
> >> +                apss_merge_funnel_out: endpoint {
> >> +                    remote-endpoint =
> >> +                      <&funnel2_in5>;
> >
> > And here.
> >
> >
> >> +                };
> >> +            };
> >> +        };
> >> +
> >> +        in-ports {
> >> +            port@1 {
> >> +                reg = <0>;
> >> +                apss_merge_funnel_in: endpoint {
> >> +                    remote-endpoint =
> >> +                      <&apss_funnel_out>;
> >> +                };
> >> +            };
> >> +        };
> >> +    };
> >> +};
> >> diff --git a/arch/arm64/boot/dts/qcom/sm8250.dtsi
> >> b/arch/arm64/boot/dts/qcom/sm8250.dtsi
> >> index af8f22636436..115623392183 100644
> >> --- a/arch/arm64/boot/dts/qcom/sm8250.dtsi
> >> +++ b/arch/arm64/boot/dts/qcom/sm8250.dtsi
> >> @@ -5434,3 +5434,5 @@
> >>           };
> >>       };
> >>   };
> >> +
> >> +#include "sm8250-coresight.dtsi"
> >
> > Why should everybody want coresight? It's not enabled on (most)
> > production devices and may cause a platform crash when you try to use
> > it on such ones.
> >
> >
> > These nodes should probably be added to sm8250.dtsi, all with status =
> > "disabled" by default, so that they don't break the devices that do
> > not support it due to fuse configuration.
> >
> I will address your comments above.
> I create coresight dtsi because of that there are dozens of coresight
> nodes for qualcomm HW.
> Add all the nodes in a separate file is easy to maintain.
> For disabling all the nodes by default, i will check internally and get
> back to you.
>

If the nodes are "disabled", then the base .dts files for platforms
that do include coresight would have to be updated to enable all those
nodes - which leaves potential for errors if nodes are accidentally
omitted.

Because sm8250-coresight.dtsi contains only Coresight devices, would
it not be better to include this directly in the base .dts file for
platforms that do have Coresight, and omit it from those that do not.

Regards

Mike


>
> Thanks
> Jinlong Mao
>
>
> >
> > Konrad
> >



-- 
Mike Leach
Principal Engineer, ARM Ltd.
Manchester Design Centre. UK



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