The QCOM SCMI vendor protocol provides a generic way of exposing a
number of Qualcomm SoC specific features (like memory bus scaling)
through a mixture of pre-determined algorithm strings and param_id
pairs hosted on the SCMI controller. Introduce a client driver that
uses the memlat algorithm string hosted on QCOM SCMI Vendor Protocol
to detect memory latency workloads and control frequency/level of
the various memory buses (DDR/LLCC/DDR_QOS).
QCOM SCMI Generic Vendor protocol background:
It was found that a lot of the vendor protocol used internally was
for debug/internal development purposes that would either be super
SoC specific or had to be disabled because of some features being
fused out during production. This lead to a large number of vendor
protocol numbers being quickly consumed and were never released
either. Using a generic vendor protocol with functionality abstracted
behind algorithm strings gave us the flexibility of allowing such
functionality exist during initial development/debugging while
still being able to expose functionality like memlat once they have
matured enough. The param-ids are certainly expected to act as ABI
for algorithms strings like MEMLAT.
Thanks in advance for taking time to review the series.
V3:
* Restructure the bindings to mimic IMX [Christian]
* Add documentation for the qcom generic vendor protocol [Christian/Sudeep]
* Pick up Rb tag and fixup/re-order elements of the vendor ops [Christian]
* Follow naming convention and folder structure used by IMX
* Add missing enum in the vendor protocol and fix documentation [Konrad]
* Add missing enum in the scmi memlat driver and fix documentation [Konrad]
* Add checks for max memory and monitor [Shivnandan]
* Fix typo from START_TIMER -> STOP_TIMER [Shivnandan]
* Make populate_physical_mask func to void [Shivnandan]
* Remove unecessary zero set [Shivnandan]
* Use __free(device node) in init_cpufreq-memfreqmap [Christian/Konrad]
* Use sdev->dev.of_node directly [Christian]
* use return dev_err_probe in multiple places [Christian]
V2:
* Drop container dvfs memlat container node. [Rob]
* Move scmi-memlat.yaml to protocol level given that a lot of vendors might end up
* using the same protocol number. [Rob]
* Replace qcom,cpulist with the standard "cpus" property. [Rob]
* Fix up compute-type/ipm-ceil required. [Rob]
* Make driver changes to the accommodate bindings changes. [Rob]
* Minor fixups in subjects/coverletter.
* Minor style fixes in dts.
V1:
* Add missing bindings for the protocol. [Konrad/Dmitry]
* Use alternate bindings. [Dmitry/Konrad]
* Rebase on top of Cristian's "SCMI multiple vendor protocol support" series. [Cristian]
* Add more documentation wherever possible. [Sudeep]
* Replace pr_err/info with it's dev equivalents.
* Mixed tabs and initialization cleanups in the memlat driver. [Konrad]
* Commit message update for the memlat driver. [Dmitry]
* Cleanups/Fixes suggested for the client driver. [Dmitry/Konrad/Cristian]
* Use opp-tables instead of memfreq-tbl. [Dmitry/Konrad]
* Detect physical cpu to deal with variants with reduced cpu count.
* Add support for DDR_QOS mem_type.
Sibi Sankar (5):
dt-bindings: firmware: Document bindings for QCOM SCMI Generic
Extension
firmware: arm_scmi: Add QCOM Generic Vendor Protocol documentation
firmware: arm_scmi: vendors: Add QCOM SCMI Generic Extensions
soc: qcom: Introduce SCMI based Memlat (Memory Latency) governor
arm64: dts: qcom: x1e80100: Enable LLCC/DDR/DDR_QOS dvfs
.../bindings/firmware/arm,scmi.yaml | 1 +
.../bindings/firmware/qcom,scmi-memlat.yaml | 246 ++++++++
arch/arm64/boot/dts/qcom/x1e80100.dtsi | 138 +++++
drivers/firmware/arm_scmi/Kconfig | 1 +
drivers/firmware/arm_scmi/Makefile | 1 +
.../firmware/arm_scmi/vendors/qcom/Kconfig | 15 +
.../firmware/arm_scmi/vendors/qcom/Makefile | 2 +
.../arm_scmi/vendors/qcom/qcom-generic-ext.c | 184 ++++++
.../arm_scmi/vendors/qcom/qcom_generic.rst | 210 +++++++
drivers/soc/qcom/Kconfig | 12 +
drivers/soc/qcom/Makefile | 1 +
drivers/soc/qcom/qcom_scmi_memlat_client.c | 569 ++++++++++++++++++
.../dt-bindings/firmware/qcom,scmi-memlat.h | 22 +
include/linux/scmi_qcom_protocol.h | 39 ++
14 files changed, 1441 insertions(+)
create mode 100644 Documentation/devicetree/bindings/firmware/qcom,scmi-memlat.yaml
create mode 100644 drivers/firmware/arm_scmi/vendors/qcom/Kconfig
create mode 100644 drivers/firmware/arm_scmi/vendors/qcom/Makefile
create mode 100644 drivers/firmware/arm_scmi/vendors/qcom/qcom-generic-ext.c
create mode 100644 drivers/firmware/arm_scmi/vendors/qcom/qcom_generic.rst
create mode 100644 drivers/soc/qcom/qcom_scmi_memlat_client.c
create mode 100644 include/dt-bindings/firmware/qcom,scmi-memlat.h
create mode 100644 include/linux/scmi_qcom_protocol.h
--
2.34.1
