Commit 55691f99 authored by Xu Yang's avatar Xu Yang Committed by Will Deacon
Browse files

drivers/perf: imx_ddr: Add support for NXP i.MX9 SoC DDRC PMU driver 



Add ddr performance monitor support for i.MX93.

There are 11 counters for ddr performance events.
- Counter 0 is a 64-bit counter that counts only clock cycles.
- Counter 1-10 are 32-bit counters that can monitor counter-specific
  events in addition to counting reference events.

For example:
  perf stat -a -e imx9_ddr0/ddrc_pm_1,counter=1/,imx9_ddr0/ddrc_pm_2,counter=2/ ls

Besides, this ddr pmu support AXI filter capability. It's implemented as
counter-specific events. It now supports read transaction, write transaction
and read beat events which corresponding respecitively to counter 2, 3 and 4.
axi_mask and axi_id need to be as event parameters.

For example:
  perf stat -a -I 1000 -e imx9_ddr0/eddrtq_pm_rd_trans_filt,counter=2,axi_mask=ID_MASK,axi_id=ID/
  perf stat -a -I 1000 -e imx9_ddr0/eddrtq_pm_wr_trans_filt,counter=3,axi_mask=ID_MASK,axi_id=ID/
  perf stat -a -I 1000 -e imx9_ddr0/eddrtq_pm_rd_beat_filt,counter=4,axi_mask=ID_MASK,axi_id=ID/

Signed-off-by: default avatarXu Yang <xu.yang_2@nxp.com>
Acked-by: default avatarMark Rutland <mark.rutland@arm.com>
Link: https://lore.kernel.org/r/20230418102910.2065651-1-xu.yang_2@nxp.com


[will: Remove redundant error message on platform_get_irq() failure]
Signed-off-by: default avatarWill Deacon <will@kernel.org>
parent d2e3bb51

drivers/perf/Kconfig

+8 −0
Original line number Diff line number Diff line
@@ -127,6 +127,14 @@ config FSL_IMX8_DDR_PMU 
	  can give information about memory throughput and other related

	  events.



config FSL_IMX9_DDR_PMU

	tristate "Freescale i.MX9 DDR perf monitor"

	depends on ARCH_MXC

	 help

	 Provides support for the DDR performance monitor in i.MX9, which

	 can give information about memory throughput and other related

	 events.



config QCOM_L2_PMU

	bool "Qualcomm Technologies L2-cache PMU"

	depends on ARCH_QCOM && ARM64 && ACPI

drivers/perf/Makefile

+1 −0
Original line number Diff line number Diff line
@@ -8,6 +8,7 @@ obj-$(CONFIG_ARM_PMU_ACPI) += arm_pmu_acpi.o 
obj-$(CONFIG_ARM_PMUV3) += arm_pmuv3.o

obj-$(CONFIG_ARM_SMMU_V3_PMU) += arm_smmuv3_pmu.o

obj-$(CONFIG_FSL_IMX8_DDR_PMU) += fsl_imx8_ddr_perf.o

obj-$(CONFIG_FSL_IMX9_DDR_PMU) += fsl_imx9_ddr_perf.o

obj-$(CONFIG_HISI_PMU) += hisilicon/

obj-$(CONFIG_QCOM_L2_PMU)	+= qcom_l2_pmu.o

obj-$(CONFIG_QCOM_L3_PMU) += qcom_l3_pmu.o

drivers/perf/fsl_imx9_ddr_perf.c

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