[PATCH 6/7] arm-cci: Add CCI-500 PMU support
Suzuki K. Poulose
suzuki.poulose at arm.com
Tue May 5 04:49:07 PDT 2015
From: "Suzuki K. Poulose" <suzuki.poulose at arm.com>
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 at arm.com>
Cc: Mark Rutland <mark.rutland at arm.com>
Cc: Will Deacon <will.deacon at arm.com>
Cc: devicetree at vger.kernel.org
Signed-off-by: Suzuki K. Poulose <suzuki.poulose at arm.com>
---
Documentation/devicetree/bindings/arm/cci.txt | 4 +-
drivers/bus/Kconfig | 12 +++
drivers/bus/arm-cci.c | 133 +++++++++++++++++++++++++
3 files changed, 148 insertions(+), 1 deletion(-)
diff --git a/Documentation/devicetree/bindings/arm/cci.txt b/Documentation/devicetree/bindings/arm/cci.txt
index 3c5c631..aef1d20 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 be66b7c..5fb3150 100644
--- a/drivers/bus/Kconfig
+++ b/drivers/bus/Kconfig
@@ -36,6 +36,18 @@ 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 || ARM64
+ depends on HW_PERF_EVENTS
+ select ARM_CCI_PMU
+ help
+ Support for PMU events monitoring on the ARM CCI-500 cache coherent
+ interconnect.
+
+ 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 2b43cea..e12ddba 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
{},
};
--
1.7.9.5
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