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From: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
To: Andy Gross <agross@kernel.org>,
	Bjorn Andersson <bjorn.andersson@linaro.org>,
	Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>,
	Georgi Djakov <djakov@kernel.org>,
	Rob Herring <robh+dt@kernel.org>,
	Catalin Marinas <catalin.marinas@arm.com>,
	Will Deacon <will@kernel.org>,
	linux-arm-msm@vger.kernel.org, linux-pm@vger.kernel.org,
	devicetree@vger.kernel.org, linux-kernel@vger.kernel.org,
	linux-arm-kernel@lists.infradead.org
Cc: Rajendra Nayak <quic_rjendra@quicinc.com>,
	Thara Gopinath <thara.gopinath@gmail.com>
Subject: [PATCH v7 4/4] arm64: dts: qcom: sdm845: Add CPU BWMON
Date: Thu, 30 Jun 2022 15:05:41 +0200	[thread overview]
Message-ID: <20220630130541.563001-5-krzysztof.kozlowski@linaro.org> (raw)
In-Reply-To: <20220630130541.563001-1-krzysztof.kozlowski@linaro.org>

Add device node for CPU-memory BWMON device (bandwidth monitoring) on
SDM845 measuring bandwidth between CPU (gladiator_noc) and Last Level
Cache (memnoc).  Usage of this BWMON allows to remove fixed bandwidth
votes from cpufreq (CPU nodes) thus achieve high memory throughput even
with lower CPU frequencies.

Co-developed-by: Thara Gopinath <thara.gopinath@gmail.com>
Signed-off-by: Thara Gopinath <thara.gopinath@gmail.com>
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
---
 arch/arm64/boot/dts/qcom/sdm845.dtsi | 37 ++++++++++++++++++++++++++++
 1 file changed, 37 insertions(+)

diff --git a/arch/arm64/boot/dts/qcom/sdm845.dtsi b/arch/arm64/boot/dts/qcom/sdm845.dtsi
index 83e8b63f0910..1872fea04785 100644
--- a/arch/arm64/boot/dts/qcom/sdm845.dtsi
+++ b/arch/arm64/boot/dts/qcom/sdm845.dtsi
@@ -2026,6 +2026,43 @@ llcc: system-cache-controller@1100000 {
 			interrupts = <GIC_SPI 582 IRQ_TYPE_LEVEL_HIGH>;
 		};
 
+		pmu@1436400 {
+			compatible = "qcom,sdm845-llcc-bwmon", "qcom,msm8998-llcc-bwmon";
+			reg = <0 0x01436400 0 0x600>;
+			interrupts = <GIC_SPI 581 IRQ_TYPE_LEVEL_HIGH>;
+			interconnects = <&gladiator_noc MASTER_APPSS_PROC 3 &mem_noc SLAVE_LLCC 3>;
+
+			operating-points-v2 = <&llcc_bwmon_opp_table>;
+
+			llcc_bwmon_opp_table: opp-table {
+				compatible = "operating-points-v2";
+
+				/*
+				 * The interconnect path bandwidth taken from
+				 * cpu4_opp_table bandwidth for OSM L3
+				 * interconnect.  This also matches the OSM L3
+				 * from bandwidth table of qcom,cpu4-l3lat-mon
+				 * (qcom,core-dev-table, bus width: 16 bytes)
+				 * from msm-4.9 downstream kernel.
+				 */
+				opp-0 {
+					opp-peak-kBps = <4800000>;
+				};
+				opp-1 {
+					opp-peak-kBps = <9216000>;
+				};
+				opp-2 {
+					opp-peak-kBps = <15052800>;
+				};
+				opp-3 {
+					opp-peak-kBps = <20889600>;
+				};
+				opp-4 {
+					opp-peak-kBps = <25497600>;
+				};
+			};
+		};
+
 		pcie0: pci@1c00000 {
 			compatible = "qcom,pcie-sdm845";
 			reg = <0 0x01c00000 0 0x2000>,
-- 
2.34.1


WARNING: multiple messages have this Message-ID (diff)
From: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
To: Andy Gross <agross@kernel.org>,
	Bjorn Andersson <bjorn.andersson@linaro.org>,
	Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>,
	Georgi Djakov <djakov@kernel.org>,
	Rob Herring <robh+dt@kernel.org>,
	Catalin Marinas <catalin.marinas@arm.com>,
	Will Deacon <will@kernel.org>,
	linux-arm-msm@vger.kernel.org, linux-pm@vger.kernel.org,
	devicetree@vger.kernel.org, linux-kernel@vger.kernel.org,
	linux-arm-kernel@lists.infradead.org
Cc: Rajendra Nayak <quic_rjendra@quicinc.com>,
	Thara Gopinath <thara.gopinath@gmail.com>
Subject: [PATCH v7 4/4] arm64: dts: qcom: sdm845: Add CPU BWMON
Date: Thu, 30 Jun 2022 15:05:41 +0200	[thread overview]
Message-ID: <20220630130541.563001-5-krzysztof.kozlowski@linaro.org> (raw)
In-Reply-To: <20220630130541.563001-1-krzysztof.kozlowski@linaro.org>

Add device node for CPU-memory BWMON device (bandwidth monitoring) on
SDM845 measuring bandwidth between CPU (gladiator_noc) and Last Level
Cache (memnoc).  Usage of this BWMON allows to remove fixed bandwidth
votes from cpufreq (CPU nodes) thus achieve high memory throughput even
with lower CPU frequencies.

Co-developed-by: Thara Gopinath <thara.gopinath@gmail.com>
Signed-off-by: Thara Gopinath <thara.gopinath@gmail.com>
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
---
 arch/arm64/boot/dts/qcom/sdm845.dtsi | 37 ++++++++++++++++++++++++++++
 1 file changed, 37 insertions(+)

diff --git a/arch/arm64/boot/dts/qcom/sdm845.dtsi b/arch/arm64/boot/dts/qcom/sdm845.dtsi
index 83e8b63f0910..1872fea04785 100644
--- a/arch/arm64/boot/dts/qcom/sdm845.dtsi
+++ b/arch/arm64/boot/dts/qcom/sdm845.dtsi
@@ -2026,6 +2026,43 @@ llcc: system-cache-controller@1100000 {
 			interrupts = <GIC_SPI 582 IRQ_TYPE_LEVEL_HIGH>;
 		};
 
+		pmu@1436400 {
+			compatible = "qcom,sdm845-llcc-bwmon", "qcom,msm8998-llcc-bwmon";
+			reg = <0 0x01436400 0 0x600>;
+			interrupts = <GIC_SPI 581 IRQ_TYPE_LEVEL_HIGH>;
+			interconnects = <&gladiator_noc MASTER_APPSS_PROC 3 &mem_noc SLAVE_LLCC 3>;
+
+			operating-points-v2 = <&llcc_bwmon_opp_table>;
+
+			llcc_bwmon_opp_table: opp-table {
+				compatible = "operating-points-v2";
+
+				/*
+				 * The interconnect path bandwidth taken from
+				 * cpu4_opp_table bandwidth for OSM L3
+				 * interconnect.  This also matches the OSM L3
+				 * from bandwidth table of qcom,cpu4-l3lat-mon
+				 * (qcom,core-dev-table, bus width: 16 bytes)
+				 * from msm-4.9 downstream kernel.
+				 */
+				opp-0 {
+					opp-peak-kBps = <4800000>;
+				};
+				opp-1 {
+					opp-peak-kBps = <9216000>;
+				};
+				opp-2 {
+					opp-peak-kBps = <15052800>;
+				};
+				opp-3 {
+					opp-peak-kBps = <20889600>;
+				};
+				opp-4 {
+					opp-peak-kBps = <25497600>;
+				};
+			};
+		};
+
 		pcie0: pci@1c00000 {
 			compatible = "qcom,pcie-sdm845";
 			reg = <0 0x01c00000 0 0x2000>,
-- 
2.34.1


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  parent reply	other threads:[~2022-06-30 13:06 UTC|newest]

Thread overview: 10+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-06-30 13:05 [PATCH v7 0/4] soc/arm64: qcom: Add initial version of bwmon Krzysztof Kozlowski
2022-06-30 13:05 ` Krzysztof Kozlowski
2022-06-30 13:05 ` [PATCH v7 1/4] dt-bindings: interconnect: qcom,msm8998-cpu-bwmon: add BWMON device Krzysztof Kozlowski
2022-06-30 13:05   ` Krzysztof Kozlowski
2022-06-30 13:05 ` [PATCH v7 2/4] soc: qcom: icc-bwmon: Add bandwidth monitoring driver Krzysztof Kozlowski
2022-06-30 13:05   ` Krzysztof Kozlowski
2022-06-30 13:05 ` [PATCH v7 3/4] arm64: defconfig: enable Qualcomm Bandwidth Monitor Krzysztof Kozlowski
2022-06-30 13:05   ` Krzysztof Kozlowski
2022-06-30 13:05 ` Krzysztof Kozlowski [this message]
2022-06-30 13:05   ` [PATCH v7 4/4] arm64: dts: qcom: sdm845: Add CPU BWMON Krzysztof Kozlowski

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