diff options
| -rw-r--r-- | Documentation/devicetree/bindings/perf/arm,smmu-v3-pmcg.yaml | 70 | ||||
| -rw-r--r-- | drivers/perf/arm_smmuv3_pmu.c | 66 |
2 files changed, 134 insertions, 2 deletions
diff --git a/Documentation/devicetree/bindings/perf/arm,smmu-v3-pmcg.yaml b/Documentation/devicetree/bindings/perf/arm,smmu-v3-pmcg.yaml new file mode 100644 index 000000000000..a4b53a6a1ebf --- /dev/null +++ b/Documentation/devicetree/bindings/perf/arm,smmu-v3-pmcg.yaml @@ -0,0 +1,70 @@ +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/perf/arm,smmu-v3-pmcg.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: Arm SMMUv3 Performance Monitor Counter Group + +maintainers: + - Will Deacon <will@kernel.org> + - Robin Murphy <robin.murphy@arm.com> + +description: | + An SMMUv3 may have several Performance Monitor Counter Group (PMCG). + They are standalone performance monitoring units that support both + architected and IMPLEMENTATION DEFINED event counters. + +properties: + $nodename: + pattern: "^pmu@[0-9a-f]*" + compatible: + oneOf: + - items: + - const: arm,mmu-600-pmcg + - const: arm,smmu-v3-pmcg + - const: arm,smmu-v3-pmcg + + reg: + items: + - description: Register page 0 + - description: Register page 1, if SMMU_PMCG_CFGR.RELOC_CTRS = 1 + minItems: 1 + + interrupts: + maxItems: 1 + + msi-parent: true + +required: + - compatible + - reg + +anyOf: + - required: + - interrupts + - required: + - msi-parent + +additionalProperties: false + +examples: + - | + #include <dt-bindings/interrupt-controller/arm-gic.h> + #include <dt-bindings/interrupt-controller/irq.h> + + pmu@2b420000 { + compatible = "arm,smmu-v3-pmcg"; + reg = <0x2b420000 0x1000>, + <0x2b430000 0x1000>; + interrupts = <GIC_SPI 80 IRQ_TYPE_EDGE_RISING>; + msi-parent = <&its 0xff0000>; + }; + + pmu@2b440000 { + compatible = "arm,smmu-v3-pmcg"; + reg = <0x2b440000 0x1000>, + <0x2b450000 0x1000>; + interrupts = <GIC_SPI 81 IRQ_TYPE_EDGE_RISING>; + msi-parent = <&its 0xff0000>; + }; diff --git a/drivers/perf/arm_smmuv3_pmu.c b/drivers/perf/arm_smmuv3_pmu.c index 226348822ab3..598d6978280d 100644 --- a/drivers/perf/arm_smmuv3_pmu.c +++ b/drivers/perf/arm_smmuv3_pmu.c @@ -47,6 +47,7 @@ #include <linux/kernel.h> #include <linux/list.h> #include <linux/msi.h> +#include <linux/of.h> #include <linux/perf_event.h> #include <linux/platform_device.h> #include <linux/smp.h> @@ -75,6 +76,10 @@ #define SMMU_PMCG_CR 0xE04 #define SMMU_PMCG_CR_ENABLE BIT(0) #define SMMU_PMCG_IIDR 0xE08 +#define SMMU_PMCG_IIDR_PRODUCTID GENMASK(31, 20) +#define SMMU_PMCG_IIDR_VARIANT GENMASK(19, 16) +#define SMMU_PMCG_IIDR_REVISION GENMASK(15, 12) +#define SMMU_PMCG_IIDR_IMPLEMENTER GENMASK(11, 0) #define SMMU_PMCG_CEID0 0xE20 #define SMMU_PMCG_CEID1 0xE28 #define SMMU_PMCG_IRQ_CTRL 0xE50 @@ -83,6 +88,20 @@ #define SMMU_PMCG_IRQ_CFG1 0xE60 #define SMMU_PMCG_IRQ_CFG2 0xE64 +/* IMP-DEF ID registers */ +#define SMMU_PMCG_PIDR0 0xFE0 +#define SMMU_PMCG_PIDR0_PART_0 GENMASK(7, 0) +#define SMMU_PMCG_PIDR1 0xFE4 +#define SMMU_PMCG_PIDR1_DES_0 GENMASK(7, 4) +#define SMMU_PMCG_PIDR1_PART_1 GENMASK(3, 0) +#define SMMU_PMCG_PIDR2 0xFE8 +#define SMMU_PMCG_PIDR2_REVISION GENMASK(7, 4) +#define SMMU_PMCG_PIDR2_DES_1 GENMASK(2, 0) +#define SMMU_PMCG_PIDR3 0xFEC +#define SMMU_PMCG_PIDR3_REVAND GENMASK(7, 4) +#define SMMU_PMCG_PIDR4 0xFD0 +#define SMMU_PMCG_PIDR4_DES_2 GENMASK(3, 0) + /* MSI config fields */ #define MSI_CFG0_ADDR_MASK GENMASK_ULL(51, 2) #define MSI_CFG2_MEMATTR_DEVICE_nGnRE 0x1 @@ -754,6 +773,41 @@ static void smmu_pmu_get_acpi_options(struct smmu_pmu *smmu_pmu) dev_notice(smmu_pmu->dev, "option mask 0x%x\n", smmu_pmu->options); } +static bool smmu_pmu_coresight_id_regs(struct smmu_pmu *smmu_pmu) +{ + return of_device_is_compatible(smmu_pmu->dev->of_node, + "arm,mmu-600-pmcg"); +} + +static void smmu_pmu_get_iidr(struct smmu_pmu *smmu_pmu) +{ + u32 iidr = readl_relaxed(smmu_pmu->reg_base + SMMU_PMCG_IIDR); + + if (!iidr && smmu_pmu_coresight_id_regs(smmu_pmu)) { + u32 pidr0 = readl(smmu_pmu->reg_base + SMMU_PMCG_PIDR0); + u32 pidr1 = readl(smmu_pmu->reg_base + SMMU_PMCG_PIDR1); + u32 pidr2 = readl(smmu_pmu->reg_base + SMMU_PMCG_PIDR2); + u32 pidr3 = readl(smmu_pmu->reg_base + SMMU_PMCG_PIDR3); + u32 pidr4 = readl(smmu_pmu->reg_base + SMMU_PMCG_PIDR4); + + u32 productid = FIELD_GET(SMMU_PMCG_PIDR0_PART_0, pidr0) | + (FIELD_GET(SMMU_PMCG_PIDR1_PART_1, pidr1) << 8); + u32 variant = FIELD_GET(SMMU_PMCG_PIDR2_REVISION, pidr2); + u32 revision = FIELD_GET(SMMU_PMCG_PIDR3_REVAND, pidr3); + u32 implementer = + FIELD_GET(SMMU_PMCG_PIDR1_DES_0, pidr1) | + (FIELD_GET(SMMU_PMCG_PIDR2_DES_1, pidr2) << 4) | + (FIELD_GET(SMMU_PMCG_PIDR4_DES_2, pidr4) << 8); + + iidr = FIELD_PREP(SMMU_PMCG_IIDR_PRODUCTID, productid) | + FIELD_PREP(SMMU_PMCG_IIDR_VARIANT, variant) | + FIELD_PREP(SMMU_PMCG_IIDR_REVISION, revision) | + FIELD_PREP(SMMU_PMCG_IIDR_IMPLEMENTER, implementer); + } + + smmu_pmu->iidr = iidr; +} + static int smmu_pmu_probe(struct platform_device *pdev) { struct smmu_pmu *smmu_pmu; @@ -825,7 +879,7 @@ static int smmu_pmu_probe(struct platform_device *pdev) return err; } - smmu_pmu->iidr = readl_relaxed(smmu_pmu->reg_base + SMMU_PMCG_IIDR); + smmu_pmu_get_iidr(smmu_pmu); name = devm_kasprintf(&pdev->dev, GFP_KERNEL, "smmuv3_pmcg_%llx", (res_0->start) >> SMMU_PMCG_PA_SHIFT); @@ -834,7 +888,8 @@ static int smmu_pmu_probe(struct platform_device *pdev) return -EINVAL; } - smmu_pmu_get_acpi_options(smmu_pmu); + if (!dev->of_node) + smmu_pmu_get_acpi_options(smmu_pmu); /* Pick one CPU to be the preferred one to use */ smmu_pmu->on_cpu = raw_smp_processor_id(); @@ -884,9 +939,16 @@ static void smmu_pmu_shutdown(struct platform_device *pdev) smmu_pmu_disable(&smmu_pmu->pmu); } +static const struct of_device_id smmu_pmu_of_match[] = { + { .compatible = "arm,smmu-v3-pmcg" }, + {} +}; +MODULE_DEVICE_TABLE(of, smmu_pmu_of_match); + static struct platform_driver smmu_pmu_driver = { .driver = { .name = "arm-smmu-v3-pmcg", + .of_match_table = of_match_ptr(smmu_pmu_of_match), .suppress_bind_attrs = true, }, .probe = smmu_pmu_probe, |