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author | Suzuki K. Poulose <suzuki.poulose@arm.com> | 2015-05-26 10:53:15 +0100 |
---|---|---|
committer | Arnd Bergmann <arnd@arndb.de> | 2015-05-29 16:43:51 +0200 |
commit | a95791efa72a08d3824713a75235d0407c0715dc (patch) | |
tree | 0d21aded97664e3911753c90a485d00e56681faf | |
parent | f4d58938adb15ec961e3f694edaffdfcb5758635 (diff) | |
download | linux-a95791efa72a08d3824713a75235d0407c0715dc.tar.bz2 |
arm-cci: Add CCI-500 PMU support
CCI-500 provides 8 event counters which can count any of the
supported events independently. The PMU event id is a 9-bit
value made of two parts.
bits [8:5] - Source port
0x0-0x6 Slave Ports
0x8-0xD Master Ports
0xf Global Events to CCI
0x7,0xe Reserved
bits [0:4] - Event code (specific to each type of port)
The generic CCI-500 controlling interface remains the same with CCI-400.
However there are some differences in the PMU event counters.
- No cycle counter
- Upto 8 counters(4 in CCI-400)
- Each counter area is 64K(4K in CCI400)
- The counter0 starts at offset 0x10000 from the base of CCI
Cc: Punit Agrawal <punit.agrawal@arm.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Will Deacon <will.deacon@arm.com>
Cc: devicetree@vger.kernel.org
Signed-off-by: Suzuki K. Poulose <suzuki.poulose@arm.com>
Acked-by: Punit Agrawal <punit.agrawal@arm.com>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
-rw-r--r-- | Documentation/devicetree/bindings/arm/cci.txt | 4 | ||||
-rw-r--r-- | drivers/bus/Kconfig | 14 | ||||
-rw-r--r-- | drivers/bus/arm-cci.c | 133 |
3 files changed, 150 insertions, 1 deletions
diff --git a/Documentation/devicetree/bindings/arm/cci.txt b/Documentation/devicetree/bindings/arm/cci.txt index 3c5c631328d3..aef1d200a9b2 100644 --- a/Documentation/devicetree/bindings/arm/cci.txt +++ b/Documentation/devicetree/bindings/arm/cci.txt @@ -31,8 +31,9 @@ specific to ARM. - compatible Usage: required Value type: <string> - Definition: must be set to + Definition: must contain one of the following: "arm,cci-400" + "arm,cci-500" - reg Usage: required @@ -99,6 +100,7 @@ specific to ARM. "arm,cci-400-pmu,r1" "arm,cci-400-pmu" - DEPRECATED, permitted only where OS has secure acces to CCI registers + "arm,cci-500-pmu,r0" - reg: Usage: required Value type: Integer cells. A register entry, expressed diff --git a/drivers/bus/Kconfig b/drivers/bus/Kconfig index a857936beac8..1a82f3a17681 100644 --- a/drivers/bus/Kconfig +++ b/drivers/bus/Kconfig @@ -34,6 +34,20 @@ config ARM_CCI400_PORT_CTRL Low level power management driver for CCI400 cache coherent interconnect for ARM platforms. +config ARM_CCI500_PMU + bool "ARM CCI500 PMU support" + default y + depends on (ARM && CPU_V7) || ARM64 + depends on PERF_EVENTS + select ARM_CCI_PMU + help + Support for PMU events monitoring on the ARM CCI-500 cache coherent + interconnect. CCI-500 provides 8 independent event counters, which + can count events pertaining to the slave/master interfaces as well + as the internal events to the CCI. + + If unsure, say Y + config ARM_CCN bool "ARM CCN driver support" depends on ARM || ARM64 diff --git a/drivers/bus/arm-cci.c b/drivers/bus/arm-cci.c index df1c2c61d304..1475eafbd25c 100644 --- a/drivers/bus/arm-cci.c +++ b/drivers/bus/arm-cci.c @@ -52,6 +52,9 @@ static const struct of_device_id arm_cci_matches[] = { #ifdef CONFIG_ARM_CCI400_COMMON {.compatible = "arm,cci-400", .data = CCI400_PORTS_DATA }, #endif +#ifdef CONFIG_ARM_CCI500_PMU + { .compatible = "arm,cci-500", }, +#endif {}, }; @@ -89,6 +92,9 @@ static const struct of_device_id arm_cci_matches[] = { enum { CCI_IF_SLAVE, CCI_IF_MASTER, +#ifdef CONFIG_ARM_CCI500_PMU + CCI_IF_GLOBAL, +#endif CCI_IF_MAX, }; @@ -145,6 +151,9 @@ enum cci_models { CCI400_R0, CCI400_R1, #endif +#ifdef CONFIG_ARM_CCI500_PMU + CCI500_R0, +#endif CCI_MODEL_MAX }; @@ -294,6 +303,101 @@ static inline struct cci_pmu_model *probe_cci_model(struct platform_device *pdev } #endif /* CONFIG_ARM_CCI400_PMU */ +#ifdef CONFIG_ARM_CCI500_PMU + +/* + * CCI500 provides 8 independent event counters that can count + * any of the events available. + * + * CCI500 PMU event id is an 9-bit value made of two parts. + * bits [8:5] - Source for the event + * 0x0-0x6 - Slave interfaces + * 0x8-0xD - Master interfaces + * 0xf - Global Events + * 0x7,0xe - Reserved + * + * bits [4:0] - Event code (specific to type of interface) + */ + +/* Port ids */ +#define CCI500_PORT_S0 0x0 +#define CCI500_PORT_S1 0x1 +#define CCI500_PORT_S2 0x2 +#define CCI500_PORT_S3 0x3 +#define CCI500_PORT_S4 0x4 +#define CCI500_PORT_S5 0x5 +#define CCI500_PORT_S6 0x6 + +#define CCI500_PORT_M0 0x8 +#define CCI500_PORT_M1 0x9 +#define CCI500_PORT_M2 0xa +#define CCI500_PORT_M3 0xb +#define CCI500_PORT_M4 0xc +#define CCI500_PORT_M5 0xd + +#define CCI500_PORT_GLOBAL 0xf + +#define CCI500_PMU_EVENT_MASK 0x1ffUL +#define CCI500_PMU_EVENT_SOURCE_SHIFT 0x5 +#define CCI500_PMU_EVENT_SOURCE_MASK 0xf +#define CCI500_PMU_EVENT_CODE_SHIFT 0x0 +#define CCI500_PMU_EVENT_CODE_MASK 0x1f + +#define CCI500_PMU_EVENT_SOURCE(event) \ + ((event >> CCI500_PMU_EVENT_SOURCE_SHIFT) & CCI500_PMU_EVENT_SOURCE_MASK) +#define CCI500_PMU_EVENT_CODE(event) \ + ((event >> CCI500_PMU_EVENT_CODE_SHIFT) & CCI500_PMU_EVENT_CODE_MASK) + +#define CCI500_SLAVE_PORT_MIN_EV 0x00 +#define CCI500_SLAVE_PORT_MAX_EV 0x1f +#define CCI500_MASTER_PORT_MIN_EV 0x00 +#define CCI500_MASTER_PORT_MAX_EV 0x06 +#define CCI500_GLOBAL_PORT_MIN_EV 0x00 +#define CCI500_GLOBAL_PORT_MAX_EV 0x0f + +static int cci500_validate_hw_event(struct cci_pmu *cci_pmu, + unsigned long hw_event) +{ + u32 ev_source = CCI500_PMU_EVENT_SOURCE(hw_event); + u32 ev_code = CCI500_PMU_EVENT_CODE(hw_event); + int if_type; + + if (hw_event & ~CCI500_PMU_EVENT_MASK) + return -ENOENT; + + switch (ev_source) { + case CCI500_PORT_S0: + case CCI500_PORT_S1: + case CCI500_PORT_S2: + case CCI500_PORT_S3: + case CCI500_PORT_S4: + case CCI500_PORT_S5: + case CCI500_PORT_S6: + if_type = CCI_IF_SLAVE; + break; + case CCI500_PORT_M0: + case CCI500_PORT_M1: + case CCI500_PORT_M2: + case CCI500_PORT_M3: + case CCI500_PORT_M4: + case CCI500_PORT_M5: + if_type = CCI_IF_MASTER; + break; + case CCI500_PORT_GLOBAL: + if_type = CCI_IF_GLOBAL; + break; + default: + return -ENOENT; + } + + if (ev_code >= cci_pmu->model->event_ranges[if_type].min && + ev_code <= cci_pmu->model->event_ranges[if_type].max) + return hw_event; + + return -ENOENT; +} +#endif /* CONFIG_ARM_CCI500_PMU */ + static int pmu_is_valid_counter(struct cci_pmu *cci_pmu, int idx) { return 0 <= idx && idx <= CCI_PMU_CNTR_LAST(cci_pmu); @@ -981,6 +1085,29 @@ static struct cci_pmu_model cci_pmu_models[] = { .get_event_idx = cci400_get_event_idx, }, #endif +#ifdef CONFIG_ARM_CCI500_PMU + [CCI500_R0] = { + .name = "CCI_500", + .fixed_hw_cntrs = 0, + .num_hw_cntrs = 8, + .cntr_size = SZ_64K, + .event_ranges = { + [CCI_IF_SLAVE] = { + CCI500_SLAVE_PORT_MIN_EV, + CCI500_SLAVE_PORT_MAX_EV, + }, + [CCI_IF_MASTER] = { + CCI500_MASTER_PORT_MIN_EV, + CCI500_MASTER_PORT_MAX_EV, + }, + [CCI_IF_GLOBAL] = { + CCI500_GLOBAL_PORT_MIN_EV, + CCI500_GLOBAL_PORT_MAX_EV, + }, + }, + .validate_hw_event = cci500_validate_hw_event, + }, +#endif }; static const struct of_device_id arm_cci_pmu_matches[] = { @@ -998,6 +1125,12 @@ static const struct of_device_id arm_cci_pmu_matches[] = { .data = &cci_pmu_models[CCI400_R1], }, #endif +#ifdef CONFIG_ARM_CCI500_PMU + { + .compatible = "arm,cci-500-pmu,r0", + .data = &cci_pmu_models[CCI500_R0], + }, +#endif {}, }; |