Hi Krzysztof, On 7/20/22 2:28 PM, Krzysztof Kozlowski wrote:
The SDM845 comes with few instances of Bandwidth Monitor. The already supported one monitors traffic between CPU and Last Level Cache Controller (LLCC) and in downstream sources is called BWMON v4 (or v4 of register layout). SDM845 also has also BWMON instance measuring traffic between LLCC and memory with different register layout: called v5. Cc: Rajendra Nayak <quic_rjendra@xxxxxxxxxxx> Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@xxxxxxxxxx> --- 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 fe14f7e7523b..4aab464e2bd6 100644 --- a/arch/arm64/boot/dts/qcom/sdm845.dtsi +++ b/arch/arm64/boot/dts/qcom/sdm845.dtsi @@ -2053,6 +2053,43 @@ llcc: system-cache-controller@1100000 { interrupts = <GIC_SPI 582 IRQ_TYPE_LEVEL_HIGH>; };+ pmu@114a000 {+ compatible = "qcom,sdm845-llcc-bwmon"; + reg = <0 0x0114a000 0 0x1000>; + interrupts = <GIC_SPI 580 IRQ_TYPE_LEVEL_HIGH>; + interconnects = <&mem_noc MASTER_LLCC 3 &mem_noc SLAVE_EBI1 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 gladiator_noc-mem_noc + * interconnect. This also matches the + * bandwidth table of qcom,llccbw (qcom,bw-tbl, + * bus width: 4 bytes) from msm-4.9 downstream + * kernel. + */ + opp-0 { + opp-peak-kBps = <800000>; + }; + opp-1 { + opp-peak-kBps = <1804000>; + }; + opp-2 { + opp-peak-kBps = <3072000>; + }; + opp-3 { + opp-peak-kBps = <5412000>; + }; + opp-4 { + opp-peak-kBps = <7216000>; + }; + }; + }; + pmu@1436400 { compatible = "qcom,sdm845-bwmon", "qcom,msm8998-bwmon"; reg = <0 0x01436400 0 0x600>;
With this series applied, testing on a Lenovo Yoga C630, which has an SDM850, I see the following:
[ 3.673660] qcom-bwmon 114a000.pmu: can't request region for resource [mem 0x0114a000-0x0114afff] [ 3.673673] qcom-bwmon 114a000.pmu: error -EBUSY: failed to map bwmon registers
[ 3.673678] qcom-bwmon: probe of 114a000.pmu failed with error -16
