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Message-ID: <20241007061023.1978380-2-quic_sibis@quicinc.com>
Date: Mon, 7 Oct 2024 11:40:19 +0530
From: Sibi Sankar <quic_sibis@...cinc.com>
To: <sudeep.holla@....com>, <cristian.marussi@....com>, <andersson@...nel.org>,
<konrad.dybcio@...aro.org>, <robh+dt@...nel.org>,
<krzysztof.kozlowski+dt@...aro.org>
CC: <linux-kernel@...r.kernel.org>, <linux-arm-msm@...r.kernel.org>,
<devicetree@...r.kernel.org>, <linux-arm-kernel@...ts.infradead.org>,
<quic_rgottimu@...cinc.com>, <quic_kshivnan@...cinc.com>,
<quic_sibis@...cinc.com>, <conor+dt@...nel.org>,
<arm-scmi@...r.kernel.org>
Subject: [PATCH V4 1/5] dt-bindings: firmware: Document bindings for QCOM SCMI Generic Extension
Document the various memory buses that can be monitored and scaled by
the memory latency governor hosted by the QCOM SCMI Generic Extension
Protocol v1.0.
Signed-off-by: Sibi Sankar <quic_sibis@...cinc.com>
---
v3:
* Restructure the bindings to mimic IMX [Christian]
.../bindings/firmware/arm,scmi.yaml | 1 +
.../bindings/firmware/qcom,scmi-memlat.yaml | 246 ++++++++++++++++++
.../dt-bindings/firmware/qcom,scmi-memlat.h | 22 ++
3 files changed, 269 insertions(+)
create mode 100644 Documentation/devicetree/bindings/firmware/qcom,scmi-memlat.yaml
create mode 100644 include/dt-bindings/firmware/qcom,scmi-memlat.h
diff --git a/Documentation/devicetree/bindings/firmware/arm,scmi.yaml b/Documentation/devicetree/bindings/firmware/arm,scmi.yaml
index 54d7d11bfed4..1d405f429168 100644
--- a/Documentation/devicetree/bindings/firmware/arm,scmi.yaml
+++ b/Documentation/devicetree/bindings/firmware/arm,scmi.yaml
@@ -24,6 +24,7 @@ description: |
anyOf:
- $ref: /schemas/firmware/nxp,imx95-scmi.yaml
+ - $ref: /schemas/firmware/qcom,scmi-memlat.yaml
properties:
$nodename:
diff --git a/Documentation/devicetree/bindings/firmware/qcom,scmi-memlat.yaml b/Documentation/devicetree/bindings/firmware/qcom,scmi-memlat.yaml
new file mode 100644
index 000000000000..0e8ea6dacd6a
--- /dev/null
+++ b/Documentation/devicetree/bindings/firmware/qcom,scmi-memlat.yaml
@@ -0,0 +1,246 @@
+# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/firmware/qcom,scmi-memlat.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Qualcomm SCMI Memory Bus nodes
+
+maintainers:
+ - Sibi Sankar <quic_sibis@...cinc.com>
+
+description:
+ This binding describes the various memory buses that can be monitored and scaled
+ by memory latency governor running on the CPU Control Processor (SCMI controller).
+
+properties:
+ protocol@80:
+ $ref: '/schemas/firmware/arm,scmi.yaml#/$defs/protocol-node'
+ unevaluatedProperties: false
+
+ properties:
+ reg:
+ const: 0x80
+
+ patternProperties:
+ '^memory-[0-9]$':
+ type: object
+ unevaluatedProperties: false
+ description:
+ The list of all memory buses that can be monitored and scaled by the
+ memory latency governor running on the SCMI controller.
+
+ properties:
+ qcom,memory-type:
+ $ref: /schemas/types.yaml#/definitions/uint32
+ enum: [0, 1, 2]
+ description: |
+ Memory Bus Identifier
+ 0 = QCOM_MEM_TYPE_DDR
+ 1 = QCOM_MEM_TYPE_LLCC
+ 2 = QCOM_MEM_TYPE_DDR_QOS
+
+ freq-table-hz:
+ items:
+ items:
+ - description: Minimum frequency of the memory bus in Hz
+ - description: Maximum frequency of the memory bus in Hz
+
+ patternProperties:
+ '^monitor-[0-9]$':
+ type: object
+ unevaluatedProperties: false
+ description:
+ The list of all monitors detecting the memory latency bound workloads using
+ various counters.
+
+ properties:
+ qcom,compute-type:
+ description:
+ Monitors of type compute perform bus dvfs based on a rudimentary CPU
+ frequency to memory frequency map.
+ type: boolean
+
+ qcom,ipm-ceil:
+ $ref: /schemas/types.yaml#/definitions/uint32
+ description:
+ Monitors having this property perform bus dvfs based on the same
+ rudimentary table but the scaling is performed only if the calculated
+ IPM (Instruction Per Misses) exceeds the given ceiling.
+
+ cpus:
+ $ref: /schemas/types.yaml#/definitions/phandle-array
+ description:
+ Should be a list of phandles to CPU nodes (as described in
+ Documentation/devicetree/bindings/arm/cpus.yaml).
+
+ operating-points-v2: true
+ opp-table:
+ type: object
+
+ required:
+ - cpus
+ - operating-points-v2
+
+ oneOf:
+ - required: [ 'qcom,compute-type' ]
+ - required: [ 'qcom,ipm-ceil' ]
+
+ required:
+ - qcom,memory-type
+ - freq-table-hz
+
+additionalProperties: true
+
+examples:
+ - |
+ #include <dt-bindings/firmware/qcom,scmi-memlat.h>
+
+ firmware {
+ scmi {
+ compatible = "arm,scmi";
+ mboxes = <&cpucp_mbox 0>, <&cpucp_mbox 2>;
+ mbox-names = "tx", "rx";
+ shmem = <&cpu_scp_lpri0>, <&cpu_scp_lpri1>;
+
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ protocol@80 {
+ reg = <0x80>;
+
+ memory-0 {
+ qcom,memory-type = <QCOM_MEM_TYPE_DDR>;
+ freq-table-hz = /bits/ 64 <200000000 4224000000>;
+
+ monitor-0 {
+ qcom,ipm-ceil = <20000000>;
+ cpus = <&CPU0 &CPU1 &CPU2 &CPU3 &CPU4 &CPU5 &CPU6 &CPU7
+ &CPU8 &CPU9 &CPU10 &CPU11>;
+ operating-points-v2 = <&memory0_monitor0_opp_table>;
+
+ memory0_monitor0_opp_table: opp-table {
+ compatible = "operating-points-v2";
+
+ opp-999000000 {
+ opp-hz = /bits/ 64 <999000000 547000000>;
+ };
+
+ opp-1440000000 {
+ opp-hz = /bits/ 64 <1440000000 768000000>;
+ };
+
+ opp-1671000000 {
+ opp-hz = /bits/ 64 <1671000000 1555000000>;
+ };
+
+ opp-2189000000 {
+ opp-hz = /bits/ 64 <2189000000 2092000000>;
+ };
+
+ opp-2516000000 {
+ opp-hz = /bits/ 64 <2516000000 3187000000>;
+ };
+
+ opp-3860000000 {
+ opp-hz = /bits/ 64 <3860000000 4224000000>;
+ };
+ };
+ };
+
+ monitor-1 {
+ qcom,compute-type;
+ cpus = <&CPU0 &CPU1 &CPU2 &CPU3 &CPU4 &CPU5 &CPU6 &CPU7
+ &CPU8 &CPU9 &CPU10 &CPU11>;
+ operating-points-v2 = <&memory0_monitor1_opp_table>;
+
+ memory0_monitor1_opp_table: opp-table {
+ compatible = "operating-points-v2";
+
+ opp-1440000000 {
+ opp-hz = /bits/ 64 <1440000000 200000000>;
+ };
+
+ opp-2189000000 {
+ opp-hz = /bits/ 64 <2189000000 768000000>;
+ };
+
+ opp-2516000000 {
+ opp-hz = /bits/ 64 <2516000000 1555000000>;
+ };
+
+ opp-3860000000 {
+ opp-hz = /bits/ 64 <3860000000 4224000000>;
+ };
+ };
+ };
+ };
+
+ memory-1 {
+ qcom,memory-type = <QCOM_MEM_TYPE_LLCC>;
+ freq-table-hz = /bits/ 64 <300000000 1067000000>;
+
+ monitor-0 {
+ qcom,ipm-ceil = <20000000>;
+ cpus = <&CPU0 &CPU1 &CPU2 &CPU3 &CPU4 &CPU5 &CPU6 &CPU7
+ &CPU8 &CPU9 &CPU10 &CPU11>;
+ operating-points-v2 = <&memory1_monitor0_opp_table>;
+
+ memory1_monitor0_opp_table: opp-table {
+ compatible = "operating-points-v2";
+
+ opp-999000000 {
+ opp-hz = /bits/ 64 <999000000 300000000>;
+ };
+
+ opp-1440000000 {
+ opp-hz = /bits/ 64 <1440000000 466000000>;
+ };
+
+ opp-1671000000 {
+ opp-hz = /bits/ 64 <1671000000 600000000>;
+ };
+
+ opp-2189000000 {
+ opp-hz = /bits/ 64 <2189000000 806000000>;
+ };
+
+ opp-2516000000 {
+ opp-hz = /bits/ 64 <2516000000 933000000>;
+ };
+
+ opp-3860000000 {
+ opp-hz = /bits/ 64 <3860000000 1066000000>;
+ };
+ };
+ };
+ };
+
+ memory-2 {
+ qcom,memory-type = <QCOM_MEM_TYPE_DDR_QOS>;
+ freq-table-hz = /bits/ 64 <QCOM_DDR_LEVEL_AUTO QCOM_DDR_LEVEL_PERF>;
+
+ monitor-0 {
+ qcom,ipm-ceil = <20000000>;
+ cpus = <&CPU0 &CPU1 &CPU2 &CPU3 &CPU4 &CPU5 &CPU6 &CPU7
+ &CPU8 &CPU9 &CPU10 &CPU11>;
+ operating-points-v2 = <&memory2_monitor0_opp_table>;
+
+ memory2_monitor0_opp_table: opp-table {
+ compatible = "operating-points-v2";
+
+ opp-2189000000 {
+ opp-hz = /bits/ 64 <2189000000>;
+ opp-level = <QCOM_DDR_LEVEL_AUTO>;
+ };
+
+ opp-3860000000 {
+ opp-hz = /bits/ 64 <3860000000>;
+ opp-level = <QCOM_DDR_LEVEL_PERF>;
+ };
+ };
+ };
+ };
+ };
+ };
+ };
diff --git a/include/dt-bindings/firmware/qcom,scmi-memlat.h b/include/dt-bindings/firmware/qcom,scmi-memlat.h
new file mode 100644
index 000000000000..7ae8d8d5623b
--- /dev/null
+++ b/include/dt-bindings/firmware/qcom,scmi-memlat.h
@@ -0,0 +1,22 @@
+/* SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) */
+/*
+ * Copyright (c) 2024, Qualcomm Innovation Center, Inc. All rights reserved.
+ */
+#ifndef __DT_BINDINGS_QCOM_SCMI_VENDOR_H
+#define __DT_BINDINGS_QCOM_SCMI_VENDOR
+
+/* Memory IDs */
+#define QCOM_MEM_TYPE_DDR 0x0
+#define QCOM_MEM_TYPE_LLCC 0x1
+#define QCOM_MEM_TYPE_DDR_QOS 0x2
+
+/*
+ * QCOM_MEM_TYPE_DDR_QOS supports the following states.
+ *
+ * %QCOM_DDR_LEVEL_AUTO: DDR operates with LPM enabled
+ * %QCOM_DDR_LEVEL_PERF: DDR operates with LPM disabled
+ */
+#define QCOM_DDR_LEVEL_AUTO 0x0
+#define QCOM_DDR_LEVEL_PERF 0x1
+
+#endif /* __DT_BINDINGS_QCOM_SCMI_VENDOR_H */
--
2.34.1
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