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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>
hifive-unleashed-5.1
Suzuki K. Poulose 2015-05-26 10:53:15 +01:00 committed by Arnd Bergmann
parent f4d58938ad
commit a95791efa7
3 changed files with 150 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
Documentation/devicetree/bindings/arm/cci.txt
View File

@ -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

14
drivers/bus/Kconfig
View File

@ -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

133
drivers/bus/arm-cci.c
View File

@ -51,6 +51,9 @@ static const struct cci_nb_ports cci400_ports = {
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,
};
@ -144,6 +150,9 @@ enum cci_models {
#ifdef CONFIG_ARM_CCI400_PMU
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[] = {
@ -997,6 +1124,12 @@ static const struct of_device_id arm_cci_pmu_matches[] = {
.compatible = "arm,cci-400-pmu,r1",
.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
{},
};