* [PATCH] dts: juno: Enable coresight tmc scatter gather in ETR @ 2018-09-11 8:47 ` Suzuki K Poulose 0 siblings, 0 replies; 8+ messages in thread From: Suzuki K Poulose @ 2018-09-11 8:47 UTC (permalink / raw) To: linux-arm-kernel We do not enable scatter-gather mode in the TMC-ETR by default to prevent malfunctioning of systems where the ETR may not be properly connected to the memory subsystem to allow for simultaneous READ/WRITE transactions when used in SG mode. Instead we whitelist the platforms where we know that it is safe to use the mode. All revisions of Juno have a proper ETR connection and hence white list them. Cc: Mathieu Poirier <mathieu.poirier@linaro.org> Cc: Mike Leach <mike.leach@linaro.org> Cc: Sudeep Holla <sudeep.holla@arm.com> Cc: Liviu Dudau <liviu.dudau@arm.com> Cc: Lorenzo Pierlisi <lorenzo.pieralisi@arm.com> Signed-off-by: Suzuki K Poulose <suzuki.poulose@arm.com> --- arch/arm64/boot/dts/arm/juno-base.dtsi | 1 + 1 file changed, 1 insertion(+) diff --git a/arch/arm64/boot/dts/arm/juno-base.dtsi b/arch/arm64/boot/dts/arm/juno-base.dtsi index ce56a4a..3596e5d 100644 --- a/arch/arm64/boot/dts/arm/juno-base.dtsi +++ b/arch/arm64/boot/dts/arm/juno-base.dtsi @@ -199,6 +199,7 @@ clocks = <&soc_smc50mhz>; clock-names = "apb_pclk"; power-domains = <&scpi_devpd 0>; + arm,scatter-gather; port { etr_in_port: endpoint { slave-mode; -- 2.7.4 ^ permalink raw reply related [flat|nested] 8+ messages in thread
* [PATCH] dts: juno: Enable coresight tmc scatter gather in ETR @ 2018-09-11 8:47 ` Suzuki K Poulose 0 siblings, 0 replies; 8+ messages in thread From: Suzuki K Poulose @ 2018-09-11 8:47 UTC (permalink / raw) To: linux-arm-kernel Cc: linux-kernel, mathieu.poirier, coresight, robert.walker, devicetree, robh, Suzuki K Poulose, Mike Leach, Sudeep Holla, Liviu Dudau, Lorenzo Pierlisi We do not enable scatter-gather mode in the TMC-ETR by default to prevent malfunctioning of systems where the ETR may not be properly connected to the memory subsystem to allow for simultaneous READ/WRITE transactions when used in SG mode. Instead we whitelist the platforms where we know that it is safe to use the mode. All revisions of Juno have a proper ETR connection and hence white list them. Cc: Mathieu Poirier <mathieu.poirier@linaro.org> Cc: Mike Leach <mike.leach@linaro.org> Cc: Sudeep Holla <sudeep.holla@arm.com> Cc: Liviu Dudau <liviu.dudau@arm.com> Cc: Lorenzo Pierlisi <lorenzo.pieralisi@arm.com> Signed-off-by: Suzuki K Poulose <suzuki.poulose@arm.com> --- arch/arm64/boot/dts/arm/juno-base.dtsi | 1 + 1 file changed, 1 insertion(+) diff --git a/arch/arm64/boot/dts/arm/juno-base.dtsi b/arch/arm64/boot/dts/arm/juno-base.dtsi index ce56a4a..3596e5d 100644 --- a/arch/arm64/boot/dts/arm/juno-base.dtsi +++ b/arch/arm64/boot/dts/arm/juno-base.dtsi @@ -199,6 +199,7 @@ clocks = <&soc_smc50mhz>; clock-names = "apb_pclk"; power-domains = <&scpi_devpd 0>; + arm,scatter-gather; port { etr_in_port: endpoint { slave-mode; -- 2.7.4 ^ permalink raw reply related [flat|nested] 8+ messages in thread
* [PATCH] dts: juno: Enable coresight tmc scatter gather in ETR 2018-09-11 8:47 ` Suzuki K Poulose @ 2018-09-11 10:35 ` Sudeep Holla -1 siblings, 0 replies; 8+ messages in thread From: Sudeep Holla @ 2018-09-11 10:35 UTC (permalink / raw) To: linux-arm-kernel On 11/09/18 09:47, Suzuki K Poulose wrote: > We do not enable scatter-gather mode in the TMC-ETR by default > to prevent malfunctioning of systems where the ETR may not be > properly connected to the memory subsystem to allow for simultaneous > READ/WRITE transactions when used in SG mode. Instead we whitelist > the platforms where we know that it is safe to use the mode. > > All revisions of Juno have a proper ETR connection and hence > white list them. > Applied conditionally, this conflicts with the patch Mathieu has in his branch. He needs to drop that so that I can take both of them via ARM SoC. -- Regards, Sudeep ^ permalink raw reply [flat|nested] 8+ messages in thread
* Re: [PATCH] dts: juno: Enable coresight tmc scatter gather in ETR @ 2018-09-11 10:35 ` Sudeep Holla 0 siblings, 0 replies; 8+ messages in thread From: Sudeep Holla @ 2018-09-11 10:35 UTC (permalink / raw) To: Suzuki K Poulose, linux-arm-kernel Cc: Sudeep Holla, linux-kernel, mathieu.poirier, coresight, robert.walker, devicetree, robh, Mike Leach, Liviu Dudau, Lorenzo Pierlisi On 11/09/18 09:47, Suzuki K Poulose wrote: > We do not enable scatter-gather mode in the TMC-ETR by default > to prevent malfunctioning of systems where the ETR may not be > properly connected to the memory subsystem to allow for simultaneous > READ/WRITE transactions when used in SG mode. Instead we whitelist > the platforms where we know that it is safe to use the mode. > > All revisions of Juno have a proper ETR connection and hence > white list them. > Applied conditionally, this conflicts with the patch Mathieu has in his branch. He needs to drop that so that I can take both of them via ARM SoC. -- Regards, Sudeep ^ permalink raw reply [flat|nested] 8+ messages in thread
* [PATCH] dts: juno: Enable coresight tmc scatter gather in ETR 2018-09-11 10:35 ` Sudeep Holla @ 2018-09-11 14:47 ` Mathieu Poirier -1 siblings, 0 replies; 8+ messages in thread From: Mathieu Poirier @ 2018-09-11 14:47 UTC (permalink / raw) To: linux-arm-kernel On Tue, 11 Sep 2018 at 04:35, Sudeep Holla <sudeep.holla@arm.com> wrote: > > On 11/09/18 09:47, Suzuki K Poulose wrote: > > We do not enable scatter-gather mode in the TMC-ETR by default > > to prevent malfunctioning of systems where the ETR may not be > > properly connected to the memory subsystem to allow for simultaneous > > READ/WRITE transactions when used in SG mode. Instead we whitelist > > the platforms where we know that it is safe to use the mode. > > > > All revisions of Juno have a proper ETR connection and hence > > white list them. > > > > Applied conditionally, this conflicts with the patch Mathieu has in his > branch. He needs to drop that so that I can take both of them via ARM SoC. As I communicated yesterday, I've already dropped that patch from my tree. > > -- > Regards, > Sudeep ^ permalink raw reply [flat|nested] 8+ messages in thread
* Re: [PATCH] dts: juno: Enable coresight tmc scatter gather in ETR @ 2018-09-11 14:47 ` Mathieu Poirier 0 siblings, 0 replies; 8+ messages in thread From: Mathieu Poirier @ 2018-09-11 14:47 UTC (permalink / raw) To: Sudeep Holla Cc: Suzuki K. Poulose, linux-arm-kernel, Linux Kernel Mailing List, coresight, Robert Walker, devicetree, Rob Herring, Mike Leach, Liviu Dudau, Lorenzo Pieralisi On Tue, 11 Sep 2018 at 04:35, Sudeep Holla <sudeep.holla@arm.com> wrote: > > On 11/09/18 09:47, Suzuki K Poulose wrote: > > We do not enable scatter-gather mode in the TMC-ETR by default > > to prevent malfunctioning of systems where the ETR may not be > > properly connected to the memory subsystem to allow for simultaneous > > READ/WRITE transactions when used in SG mode. Instead we whitelist > > the platforms where we know that it is safe to use the mode. > > > > All revisions of Juno have a proper ETR connection and hence > > white list them. > > > > Applied conditionally, this conflicts with the patch Mathieu has in his > branch. He needs to drop that so that I can take both of them via ARM SoC. As I communicated yesterday, I've already dropped that patch from my tree. > > -- > Regards, > Sudeep ^ permalink raw reply [flat|nested] 8+ messages in thread
* [PATCH] dts: juno: Enable coresight tmc scatter gather in ETR 2018-09-11 14:47 ` Mathieu Poirier @ 2018-09-11 15:23 ` Sudeep Holla -1 siblings, 0 replies; 8+ messages in thread From: Sudeep Holla @ 2018-09-11 15:23 UTC (permalink / raw) To: linux-arm-kernel On Tue, Sep 11, 2018 at 08:47:27AM -0600, Mathieu Poirier wrote: > On Tue, 11 Sep 2018 at 04:35, Sudeep Holla <sudeep.holla@arm.com> wrote: > > > > On 11/09/18 09:47, Suzuki K Poulose wrote: > > > We do not enable scatter-gather mode in the TMC-ETR by default > > > to prevent malfunctioning of systems where the ETR may not be > > > properly connected to the memory subsystem to allow for simultaneous > > > READ/WRITE transactions when used in SG mode. Instead we whitelist > > > the platforms where we know that it is safe to use the mode. > > > > > > All revisions of Juno have a proper ETR connection and hence > > > white list them. > > > > > > > Applied conditionally, this conflicts with the patch Mathieu has in his > > branch. He needs to drop that so that I can take both of them via ARM SoC. > > As I communicated yesterday, I've already dropped that patch from my tree. Thanks Mathieu, I have applied both the patches already. -- Regards, Sudeep ^ permalink raw reply [flat|nested] 8+ messages in thread
* Re: [PATCH] dts: juno: Enable coresight tmc scatter gather in ETR @ 2018-09-11 15:23 ` Sudeep Holla 0 siblings, 0 replies; 8+ messages in thread From: Sudeep Holla @ 2018-09-11 15:23 UTC (permalink / raw) To: Mathieu Poirier Cc: Suzuki K. Poulose, linux-arm-kernel, Linux Kernel Mailing List, coresight, Robert Walker, devicetree, Rob Herring, Mike Leach, Liviu Dudau, Lorenzo Pieralisi, Sudeep Holla On Tue, Sep 11, 2018 at 08:47:27AM -0600, Mathieu Poirier wrote: > On Tue, 11 Sep 2018 at 04:35, Sudeep Holla <sudeep.holla@arm.com> wrote: > > > > On 11/09/18 09:47, Suzuki K Poulose wrote: > > > We do not enable scatter-gather mode in the TMC-ETR by default > > > to prevent malfunctioning of systems where the ETR may not be > > > properly connected to the memory subsystem to allow for simultaneous > > > READ/WRITE transactions when used in SG mode. Instead we whitelist > > > the platforms where we know that it is safe to use the mode. > > > > > > All revisions of Juno have a proper ETR connection and hence > > > white list them. > > > > > > > Applied conditionally, this conflicts with the patch Mathieu has in his > > branch. He needs to drop that so that I can take both of them via ARM SoC. > > As I communicated yesterday, I've already dropped that patch from my tree. Thanks Mathieu, I have applied both the patches already. -- Regards, Sudeep ^ permalink raw reply [flat|nested] 8+ messages in thread
end of thread, other threads:[~2018-09-11 15:23 UTC | newest] Thread overview: 8+ messages (download: mbox.gz follow: Atom feed -- links below jump to the message on this page -- 2018-09-11 8:47 [PATCH] dts: juno: Enable coresight tmc scatter gather in ETR Suzuki K Poulose 2018-09-11 8:47 ` Suzuki K Poulose 2018-09-11 10:35 ` Sudeep Holla 2018-09-11 10:35 ` Sudeep Holla 2018-09-11 14:47 ` Mathieu Poirier 2018-09-11 14:47 ` Mathieu Poirier 2018-09-11 15:23 ` Sudeep Holla 2018-09-11 15:23 ` Sudeep Holla
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