@@ -8,25 +8,10 @@ menu "Bus devices"
config ARM_CCI
bool
-config ARM_CCI_PMU
- bool
- select ARM_CCI
-
config ARM_CCI400_COMMON
bool
select ARM_CCI
-config ARM_CCI400_PMU
- bool "ARM CCI400 PMU support"
- depends on (ARM && CPU_V7) || ARM64
- depends on PERF_EVENTS
- select ARM_CCI400_COMMON
- select ARM_CCI_PMU
- help
- Support for PMU events monitoring on the ARM CCI-400 (cache coherent
- interconnect). CCI-400 supports counting events related to the
- connected slave/master interfaces.
-
config ARM_CCI400_PORT_CTRL
bool
depends on ARM && OF && CPU_V7
@@ -35,19 +20,6 @@ config ARM_CCI400_PORT_CTRL
Low level power management driver for CCI400 cache coherent
interconnect for ARM platforms.
-config ARM_CCI5xx_PMU
- bool "ARM CCI-500/CCI-550 PMU support"
- 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/CCI-550 cache
- coherent interconnects. Both of them provide 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 BRCMSTB_GISB_ARB
bool "Broadcom STB GISB bus arbiter"
depends on ARM || ARM64 || MIPS
@@ -16,20 +16,17 @@
#include <linux/arm-cci.h>
#include <linux/io.h>
-#include <linux/interrupt.h>
#include <linux/module.h>
#include <linux/of_address.h>
-#include <linux/of_irq.h>
#include <linux/of_platform.h>
-#include <linux/perf_event.h>
#include <linux/platform_device.h>
#include <linux/slab.h>
-#include <linux/spinlock.h>
#include <asm/cacheflush.h>
#include <asm/smp_plat.h>
-static void __iomem *cci_ctrl_base;
+/* Referenced read-only by the PMU driver; see drivers/perf/arm-cci.c */
+void __iomem *cci_ctrl_base;
static unsigned long cci_ctrl_phys;
#ifdef CONFIG_ARM_CCI400_PORT_CTRL
@@ -59,1716 +56,7 @@ static const struct of_device_id arm_cci_matches[] = {
{},
};
-#ifdef CONFIG_ARM_CCI_PMU
-
#define DRIVER_NAME "ARM-CCI"
-#define DRIVER_NAME_PMU DRIVER_NAME " PMU"
-
-#define CCI_PMCR 0x0100
-#define CCI_PID2 0x0fe8
-
-#define CCI_PMCR_CEN 0x00000001
-#define CCI_PMCR_NCNT_MASK 0x0000f800
-#define CCI_PMCR_NCNT_SHIFT 11
-
-#define CCI_PID2_REV_MASK 0xf0
-#define CCI_PID2_REV_SHIFT 4
-
-#define CCI_PMU_EVT_SEL 0x000
-#define CCI_PMU_CNTR 0x004
-#define CCI_PMU_CNTR_CTRL 0x008
-#define CCI_PMU_OVRFLW 0x00c
-
-#define CCI_PMU_OVRFLW_FLAG 1
-
-#define CCI_PMU_CNTR_SIZE(model) ((model)->cntr_size)
-#define CCI_PMU_CNTR_BASE(model, idx) ((idx) * CCI_PMU_CNTR_SIZE(model))
-#define CCI_PMU_CNTR_MASK ((1ULL << 32) -1)
-#define CCI_PMU_CNTR_LAST(cci_pmu) (cci_pmu->num_cntrs - 1)
-
-#define CCI_PMU_MAX_HW_CNTRS(model) \
- ((model)->num_hw_cntrs + (model)->fixed_hw_cntrs)
-
-/* Types of interfaces that can generate events */
-enum {
- CCI_IF_SLAVE,
- CCI_IF_MASTER,
-#ifdef CONFIG_ARM_CCI5xx_PMU
- CCI_IF_GLOBAL,
-#endif
- CCI_IF_MAX,
-};
-
-struct event_range {
- u32 min;
- u32 max;
-};
-
-struct cci_pmu_hw_events {
- struct perf_event **events;
- unsigned long *used_mask;
- raw_spinlock_t pmu_lock;
-};
-
-struct cci_pmu;
-/*
- * struct cci_pmu_model:
- * @fixed_hw_cntrs - Number of fixed event counters
- * @num_hw_cntrs - Maximum number of programmable event counters
- * @cntr_size - Size of an event counter mapping
- */
-struct cci_pmu_model {
- char *name;
- u32 fixed_hw_cntrs;
- u32 num_hw_cntrs;
- u32 cntr_size;
- struct attribute **format_attrs;
- struct attribute **event_attrs;
- struct event_range event_ranges[CCI_IF_MAX];
- int (*validate_hw_event)(struct cci_pmu *, unsigned long);
- int (*get_event_idx)(struct cci_pmu *, struct cci_pmu_hw_events *, unsigned long);
- void (*write_counters)(struct cci_pmu *, unsigned long *);
-};
-
-static struct cci_pmu_model cci_pmu_models[];
-
-struct cci_pmu {
- void __iomem *base;
- struct pmu pmu;
- int nr_irqs;
- int *irqs;
- unsigned long active_irqs;
- const struct cci_pmu_model *model;
- struct cci_pmu_hw_events hw_events;
- struct platform_device *plat_device;
- int num_cntrs;
- atomic_t active_events;
- struct mutex reserve_mutex;
- struct hlist_node node;
- cpumask_t cpus;
-};
-
-#define to_cci_pmu(c) (container_of(c, struct cci_pmu, pmu))
-
-enum cci_models {
-#ifdef CONFIG_ARM_CCI400_PMU
- CCI400_R0,
- CCI400_R1,
-#endif
-#ifdef CONFIG_ARM_CCI5xx_PMU
- CCI500_R0,
- CCI550_R0,
-#endif
- CCI_MODEL_MAX
-};
-
-static void pmu_write_counters(struct cci_pmu *cci_pmu,
- unsigned long *mask);
-static ssize_t cci_pmu_format_show(struct device *dev,
- struct device_attribute *attr, char *buf);
-static ssize_t cci_pmu_event_show(struct device *dev,
- struct device_attribute *attr, char *buf);
-
-#define CCI_EXT_ATTR_ENTRY(_name, _func, _config) \
- &((struct dev_ext_attribute[]) { \
- { __ATTR(_name, S_IRUGO, _func, NULL), (void *)_config } \
- })[0].attr.attr
-
-#define CCI_FORMAT_EXT_ATTR_ENTRY(_name, _config) \
- CCI_EXT_ATTR_ENTRY(_name, cci_pmu_format_show, (char *)_config)
-#define CCI_EVENT_EXT_ATTR_ENTRY(_name, _config) \
- CCI_EXT_ATTR_ENTRY(_name, cci_pmu_event_show, (unsigned long)_config)
-
-/* CCI400 PMU Specific definitions */
-
-#ifdef CONFIG_ARM_CCI400_PMU
-
-/* Port ids */
-#define CCI400_PORT_S0 0
-#define CCI400_PORT_S1 1
-#define CCI400_PORT_S2 2
-#define CCI400_PORT_S3 3
-#define CCI400_PORT_S4 4
-#define CCI400_PORT_M0 5
-#define CCI400_PORT_M1 6
-#define CCI400_PORT_M2 7
-
-#define CCI400_R1_PX 5
-
-/*
- * Instead of an event id to monitor CCI cycles, a dedicated counter is
- * provided. Use 0xff to represent CCI cycles and hope that no future revisions
- * make use of this event in hardware.
- */
-enum cci400_perf_events {
- CCI400_PMU_CYCLES = 0xff
-};
-
-#define CCI400_PMU_CYCLE_CNTR_IDX 0
-#define CCI400_PMU_CNTR0_IDX 1
-
-/*
- * CCI PMU event id is an 8-bit value made of two parts - bits 7:5 for one of 8
- * ports and bits 4:0 are event codes. There are different event codes
- * associated with each port type.
- *
- * Additionally, the range of events associated with the port types changed
- * between Rev0 and Rev1.
- *
- * The constants below define the range of valid codes for each port type for
- * the different revisions and are used to validate the event to be monitored.
- */
-
-#define CCI400_PMU_EVENT_MASK 0xffUL
-#define CCI400_PMU_EVENT_SOURCE_SHIFT 5
-#define CCI400_PMU_EVENT_SOURCE_MASK 0x7
-#define CCI400_PMU_EVENT_CODE_SHIFT 0
-#define CCI400_PMU_EVENT_CODE_MASK 0x1f
-#define CCI400_PMU_EVENT_SOURCE(event) \
- ((event >> CCI400_PMU_EVENT_SOURCE_SHIFT) & \
- CCI400_PMU_EVENT_SOURCE_MASK)
-#define CCI400_PMU_EVENT_CODE(event) \
- ((event >> CCI400_PMU_EVENT_CODE_SHIFT) & CCI400_PMU_EVENT_CODE_MASK)
-
-#define CCI400_R0_SLAVE_PORT_MIN_EV 0x00
-#define CCI400_R0_SLAVE_PORT_MAX_EV 0x13
-#define CCI400_R0_MASTER_PORT_MIN_EV 0x14
-#define CCI400_R0_MASTER_PORT_MAX_EV 0x1a
-
-#define CCI400_R1_SLAVE_PORT_MIN_EV 0x00
-#define CCI400_R1_SLAVE_PORT_MAX_EV 0x14
-#define CCI400_R1_MASTER_PORT_MIN_EV 0x00
-#define CCI400_R1_MASTER_PORT_MAX_EV 0x11
-
-#define CCI400_CYCLE_EVENT_EXT_ATTR_ENTRY(_name, _config) \
- CCI_EXT_ATTR_ENTRY(_name, cci400_pmu_cycle_event_show, \
- (unsigned long)_config)
-
-static ssize_t cci400_pmu_cycle_event_show(struct device *dev,
- struct device_attribute *attr, char *buf);
-
-static struct attribute *cci400_pmu_format_attrs[] = {
- CCI_FORMAT_EXT_ATTR_ENTRY(event, "config:0-4"),
- CCI_FORMAT_EXT_ATTR_ENTRY(source, "config:5-7"),
- NULL
-};
-
-static struct attribute *cci400_r0_pmu_event_attrs[] = {
- /* Slave events */
- CCI_EVENT_EXT_ATTR_ENTRY(si_rrq_hs_any, 0x0),
- CCI_EVENT_EXT_ATTR_ENTRY(si_rrq_hs_device, 0x01),
- CCI_EVENT_EXT_ATTR_ENTRY(si_rrq_hs_normal_or_nonshareable, 0x2),
- CCI_EVENT_EXT_ATTR_ENTRY(si_rrq_hs_inner_or_outershareable, 0x3),
- CCI_EVENT_EXT_ATTR_ENTRY(si_rrq_hs_cache_maintenance, 0x4),
- CCI_EVENT_EXT_ATTR_ENTRY(si_rrq_hs_mem_barrier, 0x5),
- CCI_EVENT_EXT_ATTR_ENTRY(si_rrq_hs_sync_barrier, 0x6),
- CCI_EVENT_EXT_ATTR_ENTRY(si_rrq_hs_dvm_msg, 0x7),
- CCI_EVENT_EXT_ATTR_ENTRY(si_rrq_hs_dvm_msg_sync, 0x8),
- CCI_EVENT_EXT_ATTR_ENTRY(si_rrq_stall_tt_full, 0x9),
- CCI_EVENT_EXT_ATTR_ENTRY(si_r_data_last_hs_snoop, 0xA),
- CCI_EVENT_EXT_ATTR_ENTRY(si_r_data_stall_rvalids_h_rready_l, 0xB),
- CCI_EVENT_EXT_ATTR_ENTRY(si_wrq_hs_any, 0xC),
- CCI_EVENT_EXT_ATTR_ENTRY(si_wrq_hs_device, 0xD),
- CCI_EVENT_EXT_ATTR_ENTRY(si_wrq_hs_normal_or_nonshareable, 0xE),
- CCI_EVENT_EXT_ATTR_ENTRY(si_wrq_hs_inner_or_outershare_wback_wclean, 0xF),
- CCI_EVENT_EXT_ATTR_ENTRY(si_wrq_hs_write_unique, 0x10),
- CCI_EVENT_EXT_ATTR_ENTRY(si_wrq_hs_write_line_unique, 0x11),
- CCI_EVENT_EXT_ATTR_ENTRY(si_wrq_hs_evict, 0x12),
- CCI_EVENT_EXT_ATTR_ENTRY(si_wrq_stall_tt_full, 0x13),
- /* Master events */
- CCI_EVENT_EXT_ATTR_ENTRY(mi_retry_speculative_fetch, 0x14),
- CCI_EVENT_EXT_ATTR_ENTRY(mi_rrq_stall_addr_hazard, 0x15),
- CCI_EVENT_EXT_ATTR_ENTRY(mi_rrq_stall_id_hazard, 0x16),
- CCI_EVENT_EXT_ATTR_ENTRY(mi_rrq_stall_tt_full, 0x17),
- CCI_EVENT_EXT_ATTR_ENTRY(mi_rrq_stall_barrier_hazard, 0x18),
- CCI_EVENT_EXT_ATTR_ENTRY(mi_wrq_stall_barrier_hazard, 0x19),
- CCI_EVENT_EXT_ATTR_ENTRY(mi_wrq_stall_tt_full, 0x1A),
- /* Special event for cycles counter */
- CCI400_CYCLE_EVENT_EXT_ATTR_ENTRY(cycles, 0xff),
- NULL
-};
-
-static struct attribute *cci400_r1_pmu_event_attrs[] = {
- /* Slave events */
- CCI_EVENT_EXT_ATTR_ENTRY(si_rrq_hs_any, 0x0),
- CCI_EVENT_EXT_ATTR_ENTRY(si_rrq_hs_device, 0x01),
- CCI_EVENT_EXT_ATTR_ENTRY(si_rrq_hs_normal_or_nonshareable, 0x2),
- CCI_EVENT_EXT_ATTR_ENTRY(si_rrq_hs_inner_or_outershareable, 0x3),
- CCI_EVENT_EXT_ATTR_ENTRY(si_rrq_hs_cache_maintenance, 0x4),
- CCI_EVENT_EXT_ATTR_ENTRY(si_rrq_hs_mem_barrier, 0x5),
- CCI_EVENT_EXT_ATTR_ENTRY(si_rrq_hs_sync_barrier, 0x6),
- CCI_EVENT_EXT_ATTR_ENTRY(si_rrq_hs_dvm_msg, 0x7),
- CCI_EVENT_EXT_ATTR_ENTRY(si_rrq_hs_dvm_msg_sync, 0x8),
- CCI_EVENT_EXT_ATTR_ENTRY(si_rrq_stall_tt_full, 0x9),
- CCI_EVENT_EXT_ATTR_ENTRY(si_r_data_last_hs_snoop, 0xA),
- CCI_EVENT_EXT_ATTR_ENTRY(si_r_data_stall_rvalids_h_rready_l, 0xB),
- CCI_EVENT_EXT_ATTR_ENTRY(si_wrq_hs_any, 0xC),
- CCI_EVENT_EXT_ATTR_ENTRY(si_wrq_hs_device, 0xD),
- CCI_EVENT_EXT_ATTR_ENTRY(si_wrq_hs_normal_or_nonshareable, 0xE),
- CCI_EVENT_EXT_ATTR_ENTRY(si_wrq_hs_inner_or_outershare_wback_wclean, 0xF),
- CCI_EVENT_EXT_ATTR_ENTRY(si_wrq_hs_write_unique, 0x10),
- CCI_EVENT_EXT_ATTR_ENTRY(si_wrq_hs_write_line_unique, 0x11),
- CCI_EVENT_EXT_ATTR_ENTRY(si_wrq_hs_evict, 0x12),
- CCI_EVENT_EXT_ATTR_ENTRY(si_wrq_stall_tt_full, 0x13),
- CCI_EVENT_EXT_ATTR_ENTRY(si_rrq_stall_slave_id_hazard, 0x14),
- /* Master events */
- CCI_EVENT_EXT_ATTR_ENTRY(mi_retry_speculative_fetch, 0x0),
- CCI_EVENT_EXT_ATTR_ENTRY(mi_stall_cycle_addr_hazard, 0x1),
- CCI_EVENT_EXT_ATTR_ENTRY(mi_rrq_stall_master_id_hazard, 0x2),
- CCI_EVENT_EXT_ATTR_ENTRY(mi_rrq_stall_hi_prio_rtq_full, 0x3),
- CCI_EVENT_EXT_ATTR_ENTRY(mi_rrq_stall_barrier_hazard, 0x4),
- CCI_EVENT_EXT_ATTR_ENTRY(mi_wrq_stall_barrier_hazard, 0x5),
- CCI_EVENT_EXT_ATTR_ENTRY(mi_wrq_stall_wtq_full, 0x6),
- CCI_EVENT_EXT_ATTR_ENTRY(mi_rrq_stall_low_prio_rtq_full, 0x7),
- CCI_EVENT_EXT_ATTR_ENTRY(mi_rrq_stall_mid_prio_rtq_full, 0x8),
- CCI_EVENT_EXT_ATTR_ENTRY(mi_rrq_stall_qvn_vn0, 0x9),
- CCI_EVENT_EXT_ATTR_ENTRY(mi_rrq_stall_qvn_vn1, 0xA),
- CCI_EVENT_EXT_ATTR_ENTRY(mi_rrq_stall_qvn_vn2, 0xB),
- CCI_EVENT_EXT_ATTR_ENTRY(mi_rrq_stall_qvn_vn3, 0xC),
- CCI_EVENT_EXT_ATTR_ENTRY(mi_wrq_stall_qvn_vn0, 0xD),
- CCI_EVENT_EXT_ATTR_ENTRY(mi_wrq_stall_qvn_vn1, 0xE),
- CCI_EVENT_EXT_ATTR_ENTRY(mi_wrq_stall_qvn_vn2, 0xF),
- CCI_EVENT_EXT_ATTR_ENTRY(mi_wrq_stall_qvn_vn3, 0x10),
- CCI_EVENT_EXT_ATTR_ENTRY(mi_wrq_unique_or_line_unique_addr_hazard, 0x11),
- /* Special event for cycles counter */
- CCI400_CYCLE_EVENT_EXT_ATTR_ENTRY(cycles, 0xff),
- NULL
-};
-
-static ssize_t cci400_pmu_cycle_event_show(struct device *dev,
- struct device_attribute *attr, char *buf)
-{
- struct dev_ext_attribute *eattr = container_of(attr,
- struct dev_ext_attribute, attr);
- return snprintf(buf, PAGE_SIZE, "config=0x%lx\n", (unsigned long)eattr->var);
-}
-
-static int cci400_get_event_idx(struct cci_pmu *cci_pmu,
- struct cci_pmu_hw_events *hw,
- unsigned long cci_event)
-{
- int idx;
-
- /* cycles event idx is fixed */
- if (cci_event == CCI400_PMU_CYCLES) {
- if (test_and_set_bit(CCI400_PMU_CYCLE_CNTR_IDX, hw->used_mask))
- return -EAGAIN;
-
- return CCI400_PMU_CYCLE_CNTR_IDX;
- }
-
- for (idx = CCI400_PMU_CNTR0_IDX; idx <= CCI_PMU_CNTR_LAST(cci_pmu); ++idx)
- if (!test_and_set_bit(idx, hw->used_mask))
- return idx;
-
- /* No counters available */
- return -EAGAIN;
-}
-
-static int cci400_validate_hw_event(struct cci_pmu *cci_pmu, unsigned long hw_event)
-{
- u8 ev_source = CCI400_PMU_EVENT_SOURCE(hw_event);
- u8 ev_code = CCI400_PMU_EVENT_CODE(hw_event);
- int if_type;
-
- if (hw_event & ~CCI400_PMU_EVENT_MASK)
- return -ENOENT;
-
- if (hw_event == CCI400_PMU_CYCLES)
- return hw_event;
-
- switch (ev_source) {
- case CCI400_PORT_S0:
- case CCI400_PORT_S1:
- case CCI400_PORT_S2:
- case CCI400_PORT_S3:
- case CCI400_PORT_S4:
- /* Slave Interface */
- if_type = CCI_IF_SLAVE;
- break;
- case CCI400_PORT_M0:
- case CCI400_PORT_M1:
- case CCI400_PORT_M2:
- /* Master Interface */
- if_type = CCI_IF_MASTER;
- 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;
-}
-
-static int probe_cci400_revision(void)
-{
- int rev;
- rev = readl_relaxed(cci_ctrl_base + CCI_PID2) & CCI_PID2_REV_MASK;
- rev >>= CCI_PID2_REV_SHIFT;
-
- if (rev < CCI400_R1_PX)
- return CCI400_R0;
- else
- return CCI400_R1;
-}
-
-static const struct cci_pmu_model *probe_cci_model(struct platform_device *pdev)
-{
- if (platform_has_secure_cci_access())
- return &cci_pmu_models[probe_cci400_revision()];
- return NULL;
-}
-#else /* !CONFIG_ARM_CCI400_PMU */
-static inline struct cci_pmu_model *probe_cci_model(struct platform_device *pdev)
-{
- return NULL;
-}
-#endif /* CONFIG_ARM_CCI400_PMU */
-
-#ifdef CONFIG_ARM_CCI5xx_PMU
-
-/*
- * CCI5xx PMU event id is an 9-bit value made of two parts.
- * bits [8:5] - Source for the event
- * bits [4:0] - Event code (specific to type of interface)
- *
- *
- */
-
-/* Port ids */
-#define CCI5xx_PORT_S0 0x0
-#define CCI5xx_PORT_S1 0x1
-#define CCI5xx_PORT_S2 0x2
-#define CCI5xx_PORT_S3 0x3
-#define CCI5xx_PORT_S4 0x4
-#define CCI5xx_PORT_S5 0x5
-#define CCI5xx_PORT_S6 0x6
-
-#define CCI5xx_PORT_M0 0x8
-#define CCI5xx_PORT_M1 0x9
-#define CCI5xx_PORT_M2 0xa
-#define CCI5xx_PORT_M3 0xb
-#define CCI5xx_PORT_M4 0xc
-#define CCI5xx_PORT_M5 0xd
-#define CCI5xx_PORT_M6 0xe
-
-#define CCI5xx_PORT_GLOBAL 0xf
-
-#define CCI5xx_PMU_EVENT_MASK 0x1ffUL
-#define CCI5xx_PMU_EVENT_SOURCE_SHIFT 0x5
-#define CCI5xx_PMU_EVENT_SOURCE_MASK 0xf
-#define CCI5xx_PMU_EVENT_CODE_SHIFT 0x0
-#define CCI5xx_PMU_EVENT_CODE_MASK 0x1f
-
-#define CCI5xx_PMU_EVENT_SOURCE(event) \
- ((event >> CCI5xx_PMU_EVENT_SOURCE_SHIFT) & CCI5xx_PMU_EVENT_SOURCE_MASK)
-#define CCI5xx_PMU_EVENT_CODE(event) \
- ((event >> CCI5xx_PMU_EVENT_CODE_SHIFT) & CCI5xx_PMU_EVENT_CODE_MASK)
-
-#define CCI5xx_SLAVE_PORT_MIN_EV 0x00
-#define CCI5xx_SLAVE_PORT_MAX_EV 0x1f
-#define CCI5xx_MASTER_PORT_MIN_EV 0x00
-#define CCI5xx_MASTER_PORT_MAX_EV 0x06
-#define CCI5xx_GLOBAL_PORT_MIN_EV 0x00
-#define CCI5xx_GLOBAL_PORT_MAX_EV 0x0f
-
-
-#define CCI5xx_GLOBAL_EVENT_EXT_ATTR_ENTRY(_name, _config) \
- CCI_EXT_ATTR_ENTRY(_name, cci5xx_pmu_global_event_show, \
- (unsigned long) _config)
-
-static ssize_t cci5xx_pmu_global_event_show(struct device *dev,
- struct device_attribute *attr, char *buf);
-
-static struct attribute *cci5xx_pmu_format_attrs[] = {
- CCI_FORMAT_EXT_ATTR_ENTRY(event, "config:0-4"),
- CCI_FORMAT_EXT_ATTR_ENTRY(source, "config:5-8"),
- NULL,
-};
-
-static struct attribute *cci5xx_pmu_event_attrs[] = {
- /* Slave events */
- CCI_EVENT_EXT_ATTR_ENTRY(si_rrq_hs_arvalid, 0x0),
- CCI_EVENT_EXT_ATTR_ENTRY(si_rrq_dev, 0x1),
- CCI_EVENT_EXT_ATTR_ENTRY(si_rrq_hs_nonshareable, 0x2),
- CCI_EVENT_EXT_ATTR_ENTRY(si_rrq_hs_shareable_non_alloc, 0x3),
- CCI_EVENT_EXT_ATTR_ENTRY(si_rrq_hs_shareable_alloc, 0x4),
- CCI_EVENT_EXT_ATTR_ENTRY(si_rrq_hs_invalidate, 0x5),
- CCI_EVENT_EXT_ATTR_ENTRY(si_rrq_hs_cache_maint, 0x6),
- CCI_EVENT_EXT_ATTR_ENTRY(si_rrq_hs_dvm_msg, 0x7),
- CCI_EVENT_EXT_ATTR_ENTRY(si_rrq_hs_rval, 0x8),
- CCI_EVENT_EXT_ATTR_ENTRY(si_rrq_hs_rlast_snoop, 0x9),
- CCI_EVENT_EXT_ATTR_ENTRY(si_wrq_hs_awalid, 0xA),
- CCI_EVENT_EXT_ATTR_ENTRY(si_wrq_dev, 0xB),
- CCI_EVENT_EXT_ATTR_ENTRY(si_wrq_non_shareable, 0xC),
- CCI_EVENT_EXT_ATTR_ENTRY(si_wrq_share_wb, 0xD),
- CCI_EVENT_EXT_ATTR_ENTRY(si_wrq_share_wlu, 0xE),
- CCI_EVENT_EXT_ATTR_ENTRY(si_wrq_share_wunique, 0xF),
- CCI_EVENT_EXT_ATTR_ENTRY(si_wrq_evict, 0x10),
- CCI_EVENT_EXT_ATTR_ENTRY(si_wrq_wrevict, 0x11),
- CCI_EVENT_EXT_ATTR_ENTRY(si_w_data_beat, 0x12),
- CCI_EVENT_EXT_ATTR_ENTRY(si_srq_acvalid, 0x13),
- CCI_EVENT_EXT_ATTR_ENTRY(si_srq_read, 0x14),
- CCI_EVENT_EXT_ATTR_ENTRY(si_srq_clean, 0x15),
- CCI_EVENT_EXT_ATTR_ENTRY(si_srq_data_transfer_low, 0x16),
- CCI_EVENT_EXT_ATTR_ENTRY(si_rrq_stall_arvalid, 0x17),
- CCI_EVENT_EXT_ATTR_ENTRY(si_r_data_stall, 0x18),
- CCI_EVENT_EXT_ATTR_ENTRY(si_wrq_stall, 0x19),
- CCI_EVENT_EXT_ATTR_ENTRY(si_w_data_stall, 0x1A),
- CCI_EVENT_EXT_ATTR_ENTRY(si_w_resp_stall, 0x1B),
- CCI_EVENT_EXT_ATTR_ENTRY(si_srq_stall, 0x1C),
- CCI_EVENT_EXT_ATTR_ENTRY(si_s_data_stall, 0x1D),
- CCI_EVENT_EXT_ATTR_ENTRY(si_rq_stall_ot_limit, 0x1E),
- CCI_EVENT_EXT_ATTR_ENTRY(si_r_stall_arbit, 0x1F),
-
- /* Master events */
- CCI_EVENT_EXT_ATTR_ENTRY(mi_r_data_beat_any, 0x0),
- CCI_EVENT_EXT_ATTR_ENTRY(mi_w_data_beat_any, 0x1),
- CCI_EVENT_EXT_ATTR_ENTRY(mi_rrq_stall, 0x2),
- CCI_EVENT_EXT_ATTR_ENTRY(mi_r_data_stall, 0x3),
- CCI_EVENT_EXT_ATTR_ENTRY(mi_wrq_stall, 0x4),
- CCI_EVENT_EXT_ATTR_ENTRY(mi_w_data_stall, 0x5),
- CCI_EVENT_EXT_ATTR_ENTRY(mi_w_resp_stall, 0x6),
-
- /* Global events */
- CCI5xx_GLOBAL_EVENT_EXT_ATTR_ENTRY(cci_snoop_access_filter_bank_0_1, 0x0),
- CCI5xx_GLOBAL_EVENT_EXT_ATTR_ENTRY(cci_snoop_access_filter_bank_2_3, 0x1),
- CCI5xx_GLOBAL_EVENT_EXT_ATTR_ENTRY(cci_snoop_access_filter_bank_4_5, 0x2),
- CCI5xx_GLOBAL_EVENT_EXT_ATTR_ENTRY(cci_snoop_access_filter_bank_6_7, 0x3),
- CCI5xx_GLOBAL_EVENT_EXT_ATTR_ENTRY(cci_snoop_access_miss_filter_bank_0_1, 0x4),
- CCI5xx_GLOBAL_EVENT_EXT_ATTR_ENTRY(cci_snoop_access_miss_filter_bank_2_3, 0x5),
- CCI5xx_GLOBAL_EVENT_EXT_ATTR_ENTRY(cci_snoop_access_miss_filter_bank_4_5, 0x6),
- CCI5xx_GLOBAL_EVENT_EXT_ATTR_ENTRY(cci_snoop_access_miss_filter_bank_6_7, 0x7),
- CCI5xx_GLOBAL_EVENT_EXT_ATTR_ENTRY(cci_snoop_back_invalidation, 0x8),
- CCI5xx_GLOBAL_EVENT_EXT_ATTR_ENTRY(cci_snoop_stall_alloc_busy, 0x9),
- CCI5xx_GLOBAL_EVENT_EXT_ATTR_ENTRY(cci_snoop_stall_tt_full, 0xA),
- CCI5xx_GLOBAL_EVENT_EXT_ATTR_ENTRY(cci_wrq, 0xB),
- CCI5xx_GLOBAL_EVENT_EXT_ATTR_ENTRY(cci_snoop_cd_hs, 0xC),
- CCI5xx_GLOBAL_EVENT_EXT_ATTR_ENTRY(cci_rq_stall_addr_hazard, 0xD),
- CCI5xx_GLOBAL_EVENT_EXT_ATTR_ENTRY(cci_snoop_rq_stall_tt_full, 0xE),
- CCI5xx_GLOBAL_EVENT_EXT_ATTR_ENTRY(cci_snoop_rq_tzmp1_prot, 0xF),
- NULL
-};
-
-static ssize_t cci5xx_pmu_global_event_show(struct device *dev,
- struct device_attribute *attr, char *buf)
-{
- struct dev_ext_attribute *eattr = container_of(attr,
- struct dev_ext_attribute, attr);
- /* Global events have single fixed source code */
- return snprintf(buf, PAGE_SIZE, "event=0x%lx,source=0x%x\n",
- (unsigned long)eattr->var, CCI5xx_PORT_GLOBAL);
-}
-
-/*
- * CCI500 provides 8 independent event counters that can count
- * any of the events available.
- * CCI500 PMU event source ids
- * 0x0-0x6 - Slave interfaces
- * 0x8-0xD - Master interfaces
- * 0xf - Global Events
- * 0x7,0xe - Reserved
- */
-static int cci500_validate_hw_event(struct cci_pmu *cci_pmu,
- unsigned long hw_event)
-{
- u32 ev_source = CCI5xx_PMU_EVENT_SOURCE(hw_event);
- u32 ev_code = CCI5xx_PMU_EVENT_CODE(hw_event);
- int if_type;
-
- if (hw_event & ~CCI5xx_PMU_EVENT_MASK)
- return -ENOENT;
-
- switch (ev_source) {
- case CCI5xx_PORT_S0:
- case CCI5xx_PORT_S1:
- case CCI5xx_PORT_S2:
- case CCI5xx_PORT_S3:
- case CCI5xx_PORT_S4:
- case CCI5xx_PORT_S5:
- case CCI5xx_PORT_S6:
- if_type = CCI_IF_SLAVE;
- break;
- case CCI5xx_PORT_M0:
- case CCI5xx_PORT_M1:
- case CCI5xx_PORT_M2:
- case CCI5xx_PORT_M3:
- case CCI5xx_PORT_M4:
- case CCI5xx_PORT_M5:
- if_type = CCI_IF_MASTER;
- break;
- case CCI5xx_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;
-}
-
-/*
- * CCI550 provides 8 independent event counters that can count
- * any of the events available.
- * CCI550 PMU event source ids
- * 0x0-0x6 - Slave interfaces
- * 0x8-0xe - Master interfaces
- * 0xf - Global Events
- * 0x7 - Reserved
- */
-static int cci550_validate_hw_event(struct cci_pmu *cci_pmu,
- unsigned long hw_event)
-{
- u32 ev_source = CCI5xx_PMU_EVENT_SOURCE(hw_event);
- u32 ev_code = CCI5xx_PMU_EVENT_CODE(hw_event);
- int if_type;
-
- if (hw_event & ~CCI5xx_PMU_EVENT_MASK)
- return -ENOENT;
-
- switch (ev_source) {
- case CCI5xx_PORT_S0:
- case CCI5xx_PORT_S1:
- case CCI5xx_PORT_S2:
- case CCI5xx_PORT_S3:
- case CCI5xx_PORT_S4:
- case CCI5xx_PORT_S5:
- case CCI5xx_PORT_S6:
- if_type = CCI_IF_SLAVE;
- break;
- case CCI5xx_PORT_M0:
- case CCI5xx_PORT_M1:
- case CCI5xx_PORT_M2:
- case CCI5xx_PORT_M3:
- case CCI5xx_PORT_M4:
- case CCI5xx_PORT_M5:
- case CCI5xx_PORT_M6:
- if_type = CCI_IF_MASTER;
- break;
- case CCI5xx_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_CCI5xx_PMU */
-
-/*
- * Program the CCI PMU counters which have PERF_HES_ARCH set
- * with the event period and mark them ready before we enable
- * PMU.
- */
-static void cci_pmu_sync_counters(struct cci_pmu *cci_pmu)
-{
- int i;
- struct cci_pmu_hw_events *cci_hw = &cci_pmu->hw_events;
-
- DECLARE_BITMAP(mask, cci_pmu->num_cntrs);
-
- bitmap_zero(mask, cci_pmu->num_cntrs);
- for_each_set_bit(i, cci_pmu->hw_events.used_mask, cci_pmu->num_cntrs) {
- struct perf_event *event = cci_hw->events[i];
-
- if (WARN_ON(!event))
- continue;
-
- /* Leave the events which are not counting */
- if (event->hw.state & PERF_HES_STOPPED)
- continue;
- if (event->hw.state & PERF_HES_ARCH) {
- set_bit(i, mask);
- event->hw.state &= ~PERF_HES_ARCH;
- }
- }
-
- pmu_write_counters(cci_pmu, mask);
-}
-
-/* Should be called with cci_pmu->hw_events->pmu_lock held */
-static void __cci_pmu_enable_nosync(struct cci_pmu *cci_pmu)
-{
- u32 val;
-
- /* Enable all the PMU counters. */
- val = readl_relaxed(cci_ctrl_base + CCI_PMCR) | CCI_PMCR_CEN;
- writel(val, cci_ctrl_base + CCI_PMCR);
-}
-
-/* Should be called with cci_pmu->hw_events->pmu_lock held */
-static void __cci_pmu_enable_sync(struct cci_pmu *cci_pmu)
-{
- cci_pmu_sync_counters(cci_pmu);
- __cci_pmu_enable_nosync(cci_pmu);
-}
-
-/* Should be called with cci_pmu->hw_events->pmu_lock held */
-static void __cci_pmu_disable(void)
-{
- u32 val;
-
- /* Disable all the PMU counters. */
- val = readl_relaxed(cci_ctrl_base + CCI_PMCR) & ~CCI_PMCR_CEN;
- writel(val, cci_ctrl_base + CCI_PMCR);
-}
-
-static ssize_t cci_pmu_format_show(struct device *dev,
- struct device_attribute *attr, char *buf)
-{
- struct dev_ext_attribute *eattr = container_of(attr,
- struct dev_ext_attribute, attr);
- return snprintf(buf, PAGE_SIZE, "%s\n", (char *)eattr->var);
-}
-
-static ssize_t cci_pmu_event_show(struct device *dev,
- struct device_attribute *attr, char *buf)
-{
- struct dev_ext_attribute *eattr = container_of(attr,
- struct dev_ext_attribute, attr);
- /* source parameter is mandatory for normal PMU events */
- return snprintf(buf, PAGE_SIZE, "source=?,event=0x%lx\n",
- (unsigned long)eattr->var);
-}
-
-static int pmu_is_valid_counter(struct cci_pmu *cci_pmu, int idx)
-{
- return 0 <= idx && idx <= CCI_PMU_CNTR_LAST(cci_pmu);
-}
-
-static u32 pmu_read_register(struct cci_pmu *cci_pmu, int idx, unsigned int offset)
-{
- return readl_relaxed(cci_pmu->base +
- CCI_PMU_CNTR_BASE(cci_pmu->model, idx) + offset);
-}
-
-static void pmu_write_register(struct cci_pmu *cci_pmu, u32 value,
- int idx, unsigned int offset)
-{
- writel_relaxed(value, cci_pmu->base +
- CCI_PMU_CNTR_BASE(cci_pmu->model, idx) + offset);
-}
-
-static void pmu_disable_counter(struct cci_pmu *cci_pmu, int idx)
-{
- pmu_write_register(cci_pmu, 0, idx, CCI_PMU_CNTR_CTRL);
-}
-
-static void pmu_enable_counter(struct cci_pmu *cci_pmu, int idx)
-{
- pmu_write_register(cci_pmu, 1, idx, CCI_PMU_CNTR_CTRL);
-}
-
-static bool __maybe_unused
-pmu_counter_is_enabled(struct cci_pmu *cci_pmu, int idx)
-{
- return (pmu_read_register(cci_pmu, idx, CCI_PMU_CNTR_CTRL) & 0x1) != 0;
-}
-
-static void pmu_set_event(struct cci_pmu *cci_pmu, int idx, unsigned long event)
-{
- pmu_write_register(cci_pmu, event, idx, CCI_PMU_EVT_SEL);
-}
-
-/*
- * For all counters on the CCI-PMU, disable any 'enabled' counters,
- * saving the changed counters in the mask, so that we can restore
- * it later using pmu_restore_counters. The mask is private to the
- * caller. We cannot rely on the used_mask maintained by the CCI_PMU
- * as it only tells us if the counter is assigned to perf_event or not.
- * The state of the perf_event cannot be locked by the PMU layer, hence
- * we check the individual counter status (which can be locked by
- * cci_pm->hw_events->pmu_lock).
- *
- * @mask should be initialised to empty by the caller.
- */
-static void __maybe_unused
-pmu_save_counters(struct cci_pmu *cci_pmu, unsigned long *mask)
-{
- int i;
-
- for (i = 0; i < cci_pmu->num_cntrs; i++) {
- if (pmu_counter_is_enabled(cci_pmu, i)) {
- set_bit(i, mask);
- pmu_disable_counter(cci_pmu, i);
- }
- }
-}
-
-/*
- * Restore the status of the counters. Reversal of the pmu_save_counters().
- * For each counter set in the mask, enable the counter back.
- */
-static void __maybe_unused
-pmu_restore_counters(struct cci_pmu *cci_pmu, unsigned long *mask)
-{
- int i;
-
- for_each_set_bit(i, mask, cci_pmu->num_cntrs)
- pmu_enable_counter(cci_pmu, i);
-}
-
-/*
- * Returns the number of programmable counters actually implemented
- * by the cci
- */
-static u32 pmu_get_max_counters(void)
-{
- return (readl_relaxed(cci_ctrl_base + CCI_PMCR) &
- CCI_PMCR_NCNT_MASK) >> CCI_PMCR_NCNT_SHIFT;
-}
-
-static int pmu_get_event_idx(struct cci_pmu_hw_events *hw, struct perf_event *event)
-{
- struct cci_pmu *cci_pmu = to_cci_pmu(event->pmu);
- unsigned long cci_event = event->hw.config_base;
- int idx;
-
- if (cci_pmu->model->get_event_idx)
- return cci_pmu->model->get_event_idx(cci_pmu, hw, cci_event);
-
- /* Generic code to find an unused idx from the mask */
- for(idx = 0; idx <= CCI_PMU_CNTR_LAST(cci_pmu); idx++)
- if (!test_and_set_bit(idx, hw->used_mask))
- return idx;
-
- /* No counters available */
- return -EAGAIN;
-}
-
-static int pmu_map_event(struct perf_event *event)
-{
- struct cci_pmu *cci_pmu = to_cci_pmu(event->pmu);
-
- if (event->attr.type < PERF_TYPE_MAX ||
- !cci_pmu->model->validate_hw_event)
- return -ENOENT;
-
- return cci_pmu->model->validate_hw_event(cci_pmu, event->attr.config);
-}
-
-static int pmu_request_irq(struct cci_pmu *cci_pmu, irq_handler_t handler)
-{
- int i;
- struct platform_device *pmu_device = cci_pmu->plat_device;
-
- if (unlikely(!pmu_device))
- return -ENODEV;
-
- if (cci_pmu->nr_irqs < 1) {
- dev_err(&pmu_device->dev, "no irqs for CCI PMUs defined\n");
- return -ENODEV;
- }
-
- /*
- * Register all available CCI PMU interrupts. In the interrupt handler
- * we iterate over the counters checking for interrupt source (the
- * overflowing counter) and clear it.
- *
- * This should allow handling of non-unique interrupt for the counters.
- */
- for (i = 0; i < cci_pmu->nr_irqs; i++) {
- int err = request_irq(cci_pmu->irqs[i], handler, IRQF_SHARED,
- "arm-cci-pmu", cci_pmu);
- if (err) {
- dev_err(&pmu_device->dev, "unable to request IRQ%d for ARM CCI PMU counters\n",
- cci_pmu->irqs[i]);
- return err;
- }
-
- set_bit(i, &cci_pmu->active_irqs);
- }
-
- return 0;
-}
-
-static void pmu_free_irq(struct cci_pmu *cci_pmu)
-{
- int i;
-
- for (i = 0; i < cci_pmu->nr_irqs; i++) {
- if (!test_and_clear_bit(i, &cci_pmu->active_irqs))
- continue;
-
- free_irq(cci_pmu->irqs[i], cci_pmu);
- }
-}
-
-static u32 pmu_read_counter(struct perf_event *event)
-{
- struct cci_pmu *cci_pmu = to_cci_pmu(event->pmu);
- struct hw_perf_event *hw_counter = &event->hw;
- int idx = hw_counter->idx;
- u32 value;
-
- if (unlikely(!pmu_is_valid_counter(cci_pmu, idx))) {
- dev_err(&cci_pmu->plat_device->dev, "Invalid CCI PMU counter %d\n", idx);
- return 0;
- }
- value = pmu_read_register(cci_pmu, idx, CCI_PMU_CNTR);
-
- return value;
-}
-
-static void pmu_write_counter(struct cci_pmu *cci_pmu, u32 value, int idx)
-{
- pmu_write_register(cci_pmu, value, idx, CCI_PMU_CNTR);
-}
-
-static void __pmu_write_counters(struct cci_pmu *cci_pmu, unsigned long *mask)
-{
- int i;
- struct cci_pmu_hw_events *cci_hw = &cci_pmu->hw_events;
-
- for_each_set_bit(i, mask, cci_pmu->num_cntrs) {
- struct perf_event *event = cci_hw->events[i];
-
- if (WARN_ON(!event))
- continue;
- pmu_write_counter(cci_pmu, local64_read(&event->hw.prev_count), i);
- }
-}
-
-static void pmu_write_counters(struct cci_pmu *cci_pmu, unsigned long *mask)
-{
- if (cci_pmu->model->write_counters)
- cci_pmu->model->write_counters(cci_pmu, mask);
- else
- __pmu_write_counters(cci_pmu, mask);
-}
-
-#ifdef CONFIG_ARM_CCI5xx_PMU
-
-/*
- * CCI-500/CCI-550 has advanced power saving policies, which could gate the
- * clocks to the PMU counters, which makes the writes to them ineffective.
- * The only way to write to those counters is when the global counters
- * are enabled and the particular counter is enabled.
- *
- * So we do the following :
- *
- * 1) Disable all the PMU counters, saving their current state
- * 2) Enable the global PMU profiling, now that all counters are
- * disabled.
- *
- * For each counter to be programmed, repeat steps 3-7:
- *
- * 3) Write an invalid event code to the event control register for the
- counter, so that the counters are not modified.
- * 4) Enable the counter control for the counter.
- * 5) Set the counter value
- * 6) Disable the counter
- * 7) Restore the event in the target counter
- *
- * 8) Disable the global PMU.
- * 9) Restore the status of the rest of the counters.
- *
- * We choose an event which for CCI-5xx is guaranteed not to count.
- * We use the highest possible event code (0x1f) for the master interface 0.
- */
-#define CCI5xx_INVALID_EVENT ((CCI5xx_PORT_M0 << CCI5xx_PMU_EVENT_SOURCE_SHIFT) | \
- (CCI5xx_PMU_EVENT_CODE_MASK << CCI5xx_PMU_EVENT_CODE_SHIFT))
-static void cci5xx_pmu_write_counters(struct cci_pmu *cci_pmu, unsigned long *mask)
-{
- int i;
- DECLARE_BITMAP(saved_mask, cci_pmu->num_cntrs);
-
- bitmap_zero(saved_mask, cci_pmu->num_cntrs);
- pmu_save_counters(cci_pmu, saved_mask);
-
- /*
- * Now that all the counters are disabled, we can safely turn the PMU on,
- * without syncing the status of the counters
- */
- __cci_pmu_enable_nosync(cci_pmu);
-
- for_each_set_bit(i, mask, cci_pmu->num_cntrs) {
- struct perf_event *event = cci_pmu->hw_events.events[i];
-
- if (WARN_ON(!event))
- continue;
-
- pmu_set_event(cci_pmu, i, CCI5xx_INVALID_EVENT);
- pmu_enable_counter(cci_pmu, i);
- pmu_write_counter(cci_pmu, local64_read(&event->hw.prev_count), i);
- pmu_disable_counter(cci_pmu, i);
- pmu_set_event(cci_pmu, i, event->hw.config_base);
- }
-
- __cci_pmu_disable();
-
- pmu_restore_counters(cci_pmu, saved_mask);
-}
-
-#endif /* CONFIG_ARM_CCI5xx_PMU */
-
-static u64 pmu_event_update(struct perf_event *event)
-{
- struct hw_perf_event *hwc = &event->hw;
- u64 delta, prev_raw_count, new_raw_count;
-
- do {
- prev_raw_count = local64_read(&hwc->prev_count);
- new_raw_count = pmu_read_counter(event);
- } while (local64_cmpxchg(&hwc->prev_count, prev_raw_count,
- new_raw_count) != prev_raw_count);
-
- delta = (new_raw_count - prev_raw_count) & CCI_PMU_CNTR_MASK;
-
- local64_add(delta, &event->count);
-
- return new_raw_count;
-}
-
-static void pmu_read(struct perf_event *event)
-{
- pmu_event_update(event);
-}
-
-static void pmu_event_set_period(struct perf_event *event)
-{
- struct hw_perf_event *hwc = &event->hw;
- /*
- * The CCI PMU counters have a period of 2^32. To account for the
- * possiblity of extreme interrupt latency we program for a period of
- * half that. Hopefully we can handle the interrupt before another 2^31
- * events occur and the counter overtakes its previous value.
- */
- u64 val = 1ULL << 31;
- local64_set(&hwc->prev_count, val);
-
- /*
- * CCI PMU uses PERF_HES_ARCH to keep track of the counters, whose
- * values needs to be sync-ed with the s/w state before the PMU is
- * enabled.
- * Mark this counter for sync.
- */
- hwc->state |= PERF_HES_ARCH;
-}
-
-static irqreturn_t pmu_handle_irq(int irq_num, void *dev)
-{
- unsigned long flags;
- struct cci_pmu *cci_pmu = dev;
- struct cci_pmu_hw_events *events = &cci_pmu->hw_events;
- int idx, handled = IRQ_NONE;
-
- raw_spin_lock_irqsave(&events->pmu_lock, flags);
-
- /* Disable the PMU while we walk through the counters */
- __cci_pmu_disable();
- /*
- * Iterate over counters and update the corresponding perf events.
- * This should work regardless of whether we have per-counter overflow
- * interrupt or a combined overflow interrupt.
- */
- for (idx = 0; idx <= CCI_PMU_CNTR_LAST(cci_pmu); idx++) {
- struct perf_event *event = events->events[idx];
-
- if (!event)
- continue;
-
- /* Did this counter overflow? */
- if (!(pmu_read_register(cci_pmu, idx, CCI_PMU_OVRFLW) &
- CCI_PMU_OVRFLW_FLAG))
- continue;
-
- pmu_write_register(cci_pmu, CCI_PMU_OVRFLW_FLAG, idx,
- CCI_PMU_OVRFLW);
-
- pmu_event_update(event);
- pmu_event_set_period(event);
- handled = IRQ_HANDLED;
- }
-
- /* Enable the PMU and sync possibly overflowed counters */
- __cci_pmu_enable_sync(cci_pmu);
- raw_spin_unlock_irqrestore(&events->pmu_lock, flags);
-
- return IRQ_RETVAL(handled);
-}
-
-static int cci_pmu_get_hw(struct cci_pmu *cci_pmu)
-{
- int ret = pmu_request_irq(cci_pmu, pmu_handle_irq);
- if (ret) {
- pmu_free_irq(cci_pmu);
- return ret;
- }
- return 0;
-}
-
-static void cci_pmu_put_hw(struct cci_pmu *cci_pmu)
-{
- pmu_free_irq(cci_pmu);
-}
-
-static void hw_perf_event_destroy(struct perf_event *event)
-{
- struct cci_pmu *cci_pmu = to_cci_pmu(event->pmu);
- atomic_t *active_events = &cci_pmu->active_events;
- struct mutex *reserve_mutex = &cci_pmu->reserve_mutex;
-
- if (atomic_dec_and_mutex_lock(active_events, reserve_mutex)) {
- cci_pmu_put_hw(cci_pmu);
- mutex_unlock(reserve_mutex);
- }
-}
-
-static void cci_pmu_enable(struct pmu *pmu)
-{
- struct cci_pmu *cci_pmu = to_cci_pmu(pmu);
- struct cci_pmu_hw_events *hw_events = &cci_pmu->hw_events;
- int enabled = bitmap_weight(hw_events->used_mask, cci_pmu->num_cntrs);
- unsigned long flags;
-
- if (!enabled)
- return;
-
- raw_spin_lock_irqsave(&hw_events->pmu_lock, flags);
- __cci_pmu_enable_sync(cci_pmu);
- raw_spin_unlock_irqrestore(&hw_events->pmu_lock, flags);
-
-}
-
-static void cci_pmu_disable(struct pmu *pmu)
-{
- struct cci_pmu *cci_pmu = to_cci_pmu(pmu);
- struct cci_pmu_hw_events *hw_events = &cci_pmu->hw_events;
- unsigned long flags;
-
- raw_spin_lock_irqsave(&hw_events->pmu_lock, flags);
- __cci_pmu_disable();
- raw_spin_unlock_irqrestore(&hw_events->pmu_lock, flags);
-}
-
-/*
- * Check if the idx represents a non-programmable counter.
- * All the fixed event counters are mapped before the programmable
- * counters.
- */
-static bool pmu_fixed_hw_idx(struct cci_pmu *cci_pmu, int idx)
-{
- return (idx >= 0) && (idx < cci_pmu->model->fixed_hw_cntrs);
-}
-
-static void cci_pmu_start(struct perf_event *event, int pmu_flags)
-{
- struct cci_pmu *cci_pmu = to_cci_pmu(event->pmu);
- struct cci_pmu_hw_events *hw_events = &cci_pmu->hw_events;
- struct hw_perf_event *hwc = &event->hw;
- int idx = hwc->idx;
- unsigned long flags;
-
- /*
- * To handle interrupt latency, we always reprogram the period
- * regardlesss of PERF_EF_RELOAD.
- */
- if (pmu_flags & PERF_EF_RELOAD)
- WARN_ON_ONCE(!(hwc->state & PERF_HES_UPTODATE));
-
- hwc->state = 0;
-
- if (unlikely(!pmu_is_valid_counter(cci_pmu, idx))) {
- dev_err(&cci_pmu->plat_device->dev, "Invalid CCI PMU counter %d\n", idx);
- return;
- }
-
- raw_spin_lock_irqsave(&hw_events->pmu_lock, flags);
-
- /* Configure the counter unless you are counting a fixed event */
- if (!pmu_fixed_hw_idx(cci_pmu, idx))
- pmu_set_event(cci_pmu, idx, hwc->config_base);
-
- pmu_event_set_period(event);
- pmu_enable_counter(cci_pmu, idx);
-
- raw_spin_unlock_irqrestore(&hw_events->pmu_lock, flags);
-}
-
-static void cci_pmu_stop(struct perf_event *event, int pmu_flags)
-{
- struct cci_pmu *cci_pmu = to_cci_pmu(event->pmu);
- struct hw_perf_event *hwc = &event->hw;
- int idx = hwc->idx;
-
- if (hwc->state & PERF_HES_STOPPED)
- return;
-
- if (unlikely(!pmu_is_valid_counter(cci_pmu, idx))) {
- dev_err(&cci_pmu->plat_device->dev, "Invalid CCI PMU counter %d\n", idx);
- return;
- }
-
- /*
- * We always reprogram the counter, so ignore PERF_EF_UPDATE. See
- * cci_pmu_start()
- */
- pmu_disable_counter(cci_pmu, idx);
- pmu_event_update(event);
- hwc->state |= PERF_HES_STOPPED | PERF_HES_UPTODATE;
-}
-
-static int cci_pmu_add(struct perf_event *event, int flags)
-{
- struct cci_pmu *cci_pmu = to_cci_pmu(event->pmu);
- struct cci_pmu_hw_events *hw_events = &cci_pmu->hw_events;
- struct hw_perf_event *hwc = &event->hw;
- int idx;
- int err = 0;
-
- perf_pmu_disable(event->pmu);
-
- /* If we don't have a space for the counter then finish early. */
- idx = pmu_get_event_idx(hw_events, event);
- if (idx < 0) {
- err = idx;
- goto out;
- }
-
- event->hw.idx = idx;
- hw_events->events[idx] = event;
-
- hwc->state = PERF_HES_STOPPED | PERF_HES_UPTODATE;
- if (flags & PERF_EF_START)
- cci_pmu_start(event, PERF_EF_RELOAD);
-
- /* Propagate our changes to the userspace mapping. */
- perf_event_update_userpage(event);
-
-out:
- perf_pmu_enable(event->pmu);
- return err;
-}
-
-static void cci_pmu_del(struct perf_event *event, int flags)
-{
- struct cci_pmu *cci_pmu = to_cci_pmu(event->pmu);
- struct cci_pmu_hw_events *hw_events = &cci_pmu->hw_events;
- struct hw_perf_event *hwc = &event->hw;
- int idx = hwc->idx;
-
- cci_pmu_stop(event, PERF_EF_UPDATE);
- hw_events->events[idx] = NULL;
- clear_bit(idx, hw_events->used_mask);
-
- perf_event_update_userpage(event);
-}
-
-static int
-validate_event(struct pmu *cci_pmu,
- struct cci_pmu_hw_events *hw_events,
- struct perf_event *event)
-{
- if (is_software_event(event))
- return 1;
-
- /*
- * Reject groups spanning multiple HW PMUs (e.g. CPU + CCI). The
- * core perf code won't check that the pmu->ctx == leader->ctx
- * until after pmu->event_init(event).
- */
- if (event->pmu != cci_pmu)
- return 0;
-
- if (event->state < PERF_EVENT_STATE_OFF)
- return 1;
-
- if (event->state == PERF_EVENT_STATE_OFF && !event->attr.enable_on_exec)
- return 1;
-
- return pmu_get_event_idx(hw_events, event) >= 0;
-}
-
-static int
-validate_group(struct perf_event *event)
-{
- struct perf_event *sibling, *leader = event->group_leader;
- struct cci_pmu *cci_pmu = to_cci_pmu(event->pmu);
- unsigned long mask[BITS_TO_LONGS(cci_pmu->num_cntrs)];
- struct cci_pmu_hw_events fake_pmu = {
- /*
- * Initialise the fake PMU. We only need to populate the
- * used_mask for the purposes of validation.
- */
- .used_mask = mask,
- };
- memset(mask, 0, BITS_TO_LONGS(cci_pmu->num_cntrs) * sizeof(unsigned long));
-
- if (!validate_event(event->pmu, &fake_pmu, leader))
- return -EINVAL;
-
- list_for_each_entry(sibling, &leader->sibling_list, group_entry) {
- if (!validate_event(event->pmu, &fake_pmu, sibling))
- return -EINVAL;
- }
-
- if (!validate_event(event->pmu, &fake_pmu, event))
- return -EINVAL;
-
- return 0;
-}
-
-static int
-__hw_perf_event_init(struct perf_event *event)
-{
- struct hw_perf_event *hwc = &event->hw;
- int mapping;
-
- mapping = pmu_map_event(event);
-
- if (mapping < 0) {
- pr_debug("event %x:%llx not supported\n", event->attr.type,
- event->attr.config);
- return mapping;
- }
-
- /*
- * We don't assign an index until we actually place the event onto
- * hardware. Use -1 to signify that we haven't decided where to put it
- * yet.
- */
- hwc->idx = -1;
- hwc->config_base = 0;
- hwc->config = 0;
- hwc->event_base = 0;
-
- /*
- * Store the event encoding into the config_base field.
- */
- hwc->config_base |= (unsigned long)mapping;
-
- /*
- * Limit the sample_period to half of the counter width. That way, the
- * new counter value is far less likely to overtake the previous one
- * unless you have some serious IRQ latency issues.
- */
- hwc->sample_period = CCI_PMU_CNTR_MASK >> 1;
- hwc->last_period = hwc->sample_period;
- local64_set(&hwc->period_left, hwc->sample_period);
-
- if (event->group_leader != event) {
- if (validate_group(event) != 0)
- return -EINVAL;
- }
-
- return 0;
-}
-
-static int cci_pmu_event_init(struct perf_event *event)
-{
- struct cci_pmu *cci_pmu = to_cci_pmu(event->pmu);
- atomic_t *active_events = &cci_pmu->active_events;
- int err = 0;
- int cpu;
-
- if (event->attr.type != event->pmu->type)
- return -ENOENT;
-
- /* Shared by all CPUs, no meaningful state to sample */
- if (is_sampling_event(event) || event->attach_state & PERF_ATTACH_TASK)
- return -EOPNOTSUPP;
-
- /* We have no filtering of any kind */
- if (event->attr.exclude_user ||
- event->attr.exclude_kernel ||
- event->attr.exclude_hv ||
- event->attr.exclude_idle ||
- event->attr.exclude_host ||
- event->attr.exclude_guest)
- return -EINVAL;
-
- /*
- * Following the example set by other "uncore" PMUs, we accept any CPU
- * and rewrite its affinity dynamically rather than having perf core
- * handle cpu == -1 and pid == -1 for this case.
- *
- * The perf core will pin online CPUs for the duration of this call and
- * the event being installed into its context, so the PMU's CPU can't
- * change under our feet.
- */
- cpu = cpumask_first(&cci_pmu->cpus);
- if (event->cpu < 0 || cpu < 0)
- return -EINVAL;
- event->cpu = cpu;
-
- event->destroy = hw_perf_event_destroy;
- if (!atomic_inc_not_zero(active_events)) {
- mutex_lock(&cci_pmu->reserve_mutex);
- if (atomic_read(active_events) == 0)
- err = cci_pmu_get_hw(cci_pmu);
- if (!err)
- atomic_inc(active_events);
- mutex_unlock(&cci_pmu->reserve_mutex);
- }
- if (err)
- return err;
-
- err = __hw_perf_event_init(event);
- if (err)
- hw_perf_event_destroy(event);
-
- return err;
-}
-
-static ssize_t pmu_cpumask_attr_show(struct device *dev,
- struct device_attribute *attr, char *buf)
-{
- struct pmu *pmu = dev_get_drvdata(dev);
- struct cci_pmu *cci_pmu = to_cci_pmu(pmu);
-
- int n = scnprintf(buf, PAGE_SIZE - 1, "%*pbl",
- cpumask_pr_args(&cci_pmu->cpus));
- buf[n++] = '\n';
- buf[n] = '\0';
- return n;
-}
-
-static struct device_attribute pmu_cpumask_attr =
- __ATTR(cpumask, S_IRUGO, pmu_cpumask_attr_show, NULL);
-
-static struct attribute *pmu_attrs[] = {
- &pmu_cpumask_attr.attr,
- NULL,
-};
-
-static struct attribute_group pmu_attr_group = {
- .attrs = pmu_attrs,
-};
-
-static struct attribute_group pmu_format_attr_group = {
- .name = "format",
- .attrs = NULL, /* Filled in cci_pmu_init_attrs */
-};
-
-static struct attribute_group pmu_event_attr_group = {
- .name = "events",
- .attrs = NULL, /* Filled in cci_pmu_init_attrs */
-};
-
-static const struct attribute_group *pmu_attr_groups[] = {
- &pmu_attr_group,
- &pmu_format_attr_group,
- &pmu_event_attr_group,
- NULL
-};
-
-static int cci_pmu_init(struct cci_pmu *cci_pmu, struct platform_device *pdev)
-{
- const struct cci_pmu_model *model = cci_pmu->model;
- char *name = model->name;
- u32 num_cntrs;
-
- pmu_event_attr_group.attrs = model->event_attrs;
- pmu_format_attr_group.attrs = model->format_attrs;
-
- cci_pmu->pmu = (struct pmu) {
- .name = cci_pmu->model->name,
- .task_ctx_nr = perf_invalid_context,
- .pmu_enable = cci_pmu_enable,
- .pmu_disable = cci_pmu_disable,
- .event_init = cci_pmu_event_init,
- .add = cci_pmu_add,
- .del = cci_pmu_del,
- .start = cci_pmu_start,
- .stop = cci_pmu_stop,
- .read = pmu_read,
- .attr_groups = pmu_attr_groups,
- };
-
- cci_pmu->plat_device = pdev;
- num_cntrs = pmu_get_max_counters();
- if (num_cntrs > cci_pmu->model->num_hw_cntrs) {
- dev_warn(&pdev->dev,
- "PMU implements more counters(%d) than supported by"
- " the model(%d), truncated.",
- num_cntrs, cci_pmu->model->num_hw_cntrs);
- num_cntrs = cci_pmu->model->num_hw_cntrs;
- }
- cci_pmu->num_cntrs = num_cntrs + cci_pmu->model->fixed_hw_cntrs;
-
- return perf_pmu_register(&cci_pmu->pmu, name, -1);
-}
-
-static int cci_pmu_offline_cpu(unsigned int cpu, struct hlist_node *node)
-{
- struct cci_pmu *cci_pmu = hlist_entry_safe(node, struct cci_pmu, node);
- unsigned int target;
-
- if (!cpumask_test_and_clear_cpu(cpu, &cci_pmu->cpus))
- return 0;
- target = cpumask_any_but(cpu_online_mask, cpu);
- if (target >= nr_cpu_ids)
- return 0;
- /*
- * TODO: migrate context once core races on event->ctx have
- * been fixed.
- */
- cpumask_set_cpu(target, &cci_pmu->cpus);
- return 0;
-}
-
-static struct cci_pmu_model cci_pmu_models[] = {
-#ifdef CONFIG_ARM_CCI400_PMU
- [CCI400_R0] = {
- .name = "CCI_400",
- .fixed_hw_cntrs = 1, /* Cycle counter */
- .num_hw_cntrs = 4,
- .cntr_size = SZ_4K,
- .format_attrs = cci400_pmu_format_attrs,
- .event_attrs = cci400_r0_pmu_event_attrs,
- .event_ranges = {
- [CCI_IF_SLAVE] = {
- CCI400_R0_SLAVE_PORT_MIN_EV,
- CCI400_R0_SLAVE_PORT_MAX_EV,
- },
- [CCI_IF_MASTER] = {
- CCI400_R0_MASTER_PORT_MIN_EV,
- CCI400_R0_MASTER_PORT_MAX_EV,
- },
- },
- .validate_hw_event = cci400_validate_hw_event,
- .get_event_idx = cci400_get_event_idx,
- },
- [CCI400_R1] = {
- .name = "CCI_400_r1",
- .fixed_hw_cntrs = 1, /* Cycle counter */
- .num_hw_cntrs = 4,
- .cntr_size = SZ_4K,
- .format_attrs = cci400_pmu_format_attrs,
- .event_attrs = cci400_r1_pmu_event_attrs,
- .event_ranges = {
- [CCI_IF_SLAVE] = {
- CCI400_R1_SLAVE_PORT_MIN_EV,
- CCI400_R1_SLAVE_PORT_MAX_EV,
- },
- [CCI_IF_MASTER] = {
- CCI400_R1_MASTER_PORT_MIN_EV,
- CCI400_R1_MASTER_PORT_MAX_EV,
- },
- },
- .validate_hw_event = cci400_validate_hw_event,
- .get_event_idx = cci400_get_event_idx,
- },
-#endif
-#ifdef CONFIG_ARM_CCI5xx_PMU
- [CCI500_R0] = {
- .name = "CCI_500",
- .fixed_hw_cntrs = 0,
- .num_hw_cntrs = 8,
- .cntr_size = SZ_64K,
- .format_attrs = cci5xx_pmu_format_attrs,
- .event_attrs = cci5xx_pmu_event_attrs,
- .event_ranges = {
- [CCI_IF_SLAVE] = {
- CCI5xx_SLAVE_PORT_MIN_EV,
- CCI5xx_SLAVE_PORT_MAX_EV,
- },
- [CCI_IF_MASTER] = {
- CCI5xx_MASTER_PORT_MIN_EV,
- CCI5xx_MASTER_PORT_MAX_EV,
- },
- [CCI_IF_GLOBAL] = {
- CCI5xx_GLOBAL_PORT_MIN_EV,
- CCI5xx_GLOBAL_PORT_MAX_EV,
- },
- },
- .validate_hw_event = cci500_validate_hw_event,
- .write_counters = cci5xx_pmu_write_counters,
- },
- [CCI550_R0] = {
- .name = "CCI_550",
- .fixed_hw_cntrs = 0,
- .num_hw_cntrs = 8,
- .cntr_size = SZ_64K,
- .format_attrs = cci5xx_pmu_format_attrs,
- .event_attrs = cci5xx_pmu_event_attrs,
- .event_ranges = {
- [CCI_IF_SLAVE] = {
- CCI5xx_SLAVE_PORT_MIN_EV,
- CCI5xx_SLAVE_PORT_MAX_EV,
- },
- [CCI_IF_MASTER] = {
- CCI5xx_MASTER_PORT_MIN_EV,
- CCI5xx_MASTER_PORT_MAX_EV,
- },
- [CCI_IF_GLOBAL] = {
- CCI5xx_GLOBAL_PORT_MIN_EV,
- CCI5xx_GLOBAL_PORT_MAX_EV,
- },
- },
- .validate_hw_event = cci550_validate_hw_event,
- .write_counters = cci5xx_pmu_write_counters,
- },
-#endif
-};
-
-static const struct of_device_id arm_cci_pmu_matches[] = {
-#ifdef CONFIG_ARM_CCI400_PMU
- {
- .compatible = "arm,cci-400-pmu",
- .data = NULL,
- },
- {
- .compatible = "arm,cci-400-pmu,r0",
- .data = &cci_pmu_models[CCI400_R0],
- },
- {
- .compatible = "arm,cci-400-pmu,r1",
- .data = &cci_pmu_models[CCI400_R1],
- },
-#endif
-#ifdef CONFIG_ARM_CCI5xx_PMU
- {
- .compatible = "arm,cci-500-pmu,r0",
- .data = &cci_pmu_models[CCI500_R0],
- },
- {
- .compatible = "arm,cci-550-pmu,r0",
- .data = &cci_pmu_models[CCI550_R0],
- },
-#endif
- {},
-};
-
-static inline const struct cci_pmu_model *get_cci_model(struct platform_device *pdev)
-{
- const struct of_device_id *match = of_match_node(arm_cci_pmu_matches,
- pdev->dev.of_node);
- if (!match)
- return NULL;
- if (match->data)
- return match->data;
-
- dev_warn(&pdev->dev, "DEPRECATED compatible property,"
- "requires secure access to CCI registers");
- return probe_cci_model(pdev);
-}
-
-static bool is_duplicate_irq(int irq, int *irqs, int nr_irqs)
-{
- int i;
-
- for (i = 0; i < nr_irqs; i++)
- if (irq == irqs[i])
- return true;
-
- return false;
-}
-
-static struct cci_pmu *cci_pmu_alloc(struct platform_device *pdev)
-{
- struct cci_pmu *cci_pmu;
- const struct cci_pmu_model *model;
-
- /*
- * All allocations are devm_* hence we don't have to free
- * them explicitly on an error, as it would end up in driver
- * detach.
- */
- model = get_cci_model(pdev);
- if (!model) {
- dev_warn(&pdev->dev, "CCI PMU version not supported\n");
- return ERR_PTR(-ENODEV);
- }
-
- cci_pmu = devm_kzalloc(&pdev->dev, sizeof(*cci_pmu), GFP_KERNEL);
- if (!cci_pmu)
- return ERR_PTR(-ENOMEM);
-
- cci_pmu->model = model;
- cci_pmu->irqs = devm_kcalloc(&pdev->dev, CCI_PMU_MAX_HW_CNTRS(model),
- sizeof(*cci_pmu->irqs), GFP_KERNEL);
- if (!cci_pmu->irqs)
- return ERR_PTR(-ENOMEM);
- cci_pmu->hw_events.events = devm_kcalloc(&pdev->dev,
- CCI_PMU_MAX_HW_CNTRS(model),
- sizeof(*cci_pmu->hw_events.events),
- GFP_KERNEL);
- if (!cci_pmu->hw_events.events)
- return ERR_PTR(-ENOMEM);
- cci_pmu->hw_events.used_mask = devm_kcalloc(&pdev->dev,
- BITS_TO_LONGS(CCI_PMU_MAX_HW_CNTRS(model)),
- sizeof(*cci_pmu->hw_events.used_mask),
- GFP_KERNEL);
- if (!cci_pmu->hw_events.used_mask)
- return ERR_PTR(-ENOMEM);
-
- return cci_pmu;
-}
-
-
-static int cci_pmu_probe(struct platform_device *pdev)
-{
- struct resource *res;
- struct cci_pmu *cci_pmu;
- int i, ret, irq;
-
- cci_pmu = cci_pmu_alloc(pdev);
- if (IS_ERR(cci_pmu))
- return PTR_ERR(cci_pmu);
-
- res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
- cci_pmu->base = devm_ioremap_resource(&pdev->dev, res);
- if (IS_ERR(cci_pmu->base))
- return -ENOMEM;
-
- /*
- * CCI PMU has one overflow interrupt per counter; but some may be tied
- * together to a common interrupt.
- */
- cci_pmu->nr_irqs = 0;
- for (i = 0; i < CCI_PMU_MAX_HW_CNTRS(cci_pmu->model); i++) {
- irq = platform_get_irq(pdev, i);
- if (irq < 0)
- break;
-
- if (is_duplicate_irq(irq, cci_pmu->irqs, cci_pmu->nr_irqs))
- continue;
-
- cci_pmu->irqs[cci_pmu->nr_irqs++] = irq;
- }
-
- /*
- * Ensure that the device tree has as many interrupts as the number
- * of counters.
- */
- if (i < CCI_PMU_MAX_HW_CNTRS(cci_pmu->model)) {
- dev_warn(&pdev->dev, "In-correct number of interrupts: %d, should be %d\n",
- i, CCI_PMU_MAX_HW_CNTRS(cci_pmu->model));
- return -EINVAL;
- }
-
- raw_spin_lock_init(&cci_pmu->hw_events.pmu_lock);
- mutex_init(&cci_pmu->reserve_mutex);
- atomic_set(&cci_pmu->active_events, 0);
- cpumask_set_cpu(get_cpu(), &cci_pmu->cpus);
-
- ret = cci_pmu_init(cci_pmu, pdev);
- if (ret) {
- put_cpu();
- return ret;
- }
-
- cpuhp_state_add_instance_nocalls(CPUHP_AP_PERF_ARM_CCI_ONLINE,
- &cci_pmu->node);
- put_cpu();
- pr_info("ARM %s PMU driver probed", cci_pmu->model->name);
- return 0;
-}
static int cci_platform_probe(struct platform_device *pdev)
{
@@ -1778,14 +66,6 @@ static int cci_platform_probe(struct platform_device *pdev)
return of_platform_populate(pdev->dev.of_node, NULL, NULL, &pdev->dev);
}
-static struct platform_driver cci_pmu_driver = {
- .driver = {
- .name = DRIVER_NAME_PMU,
- .of_match_table = arm_cci_pmu_matches,
- },
- .probe = cci_pmu_probe,
-};
-
static struct platform_driver cci_platform_driver = {
.driver = {
.name = DRIVER_NAME,
@@ -1796,30 +76,9 @@ static struct platform_driver cci_platform_driver = {
static int __init cci_platform_init(void)
{
- int ret;
-
- ret = cpuhp_setup_state_multi(CPUHP_AP_PERF_ARM_CCI_ONLINE,
- "perf/arm/cci:online", NULL,
- cci_pmu_offline_cpu);
- if (ret)
- return ret;
-
- ret = platform_driver_register(&cci_pmu_driver);
- if (ret)
- return ret;
-
return platform_driver_register(&cci_platform_driver);
}
-#else /* !CONFIG_ARM_CCI_PMU */
-
-static int __init cci_platform_init(void)
-{
- return 0;
-}
-
-#endif /* CONFIG_ARM_CCI_PMU */
-
#ifdef CONFIG_ARM_CCI400_PORT_CTRL
#define CCI_PORT_CTRL 0x0
@@ -5,6 +5,32 @@
menu "Performance monitor support"
depends on PERF_EVENTS
+config ARM_CCI_PMU
+ bool
+ select ARM_CCI
+
+config ARM_CCI400_PMU
+ bool "ARM CCI400 PMU support"
+ depends on (ARM && CPU_V7) || ARM64
+ select ARM_CCI400_COMMON
+ select ARM_CCI_PMU
+ help
+ Support for PMU events monitoring on the ARM CCI-400 (cache coherent
+ interconnect). CCI-400 supports counting events related to the
+ connected slave/master interfaces.
+
+config ARM_CCI5xx_PMU
+ bool "ARM CCI-500/CCI-550 PMU support"
+ depends on (ARM && CPU_V7) || ARM64
+ select ARM_CCI_PMU
+ help
+ Support for PMU events monitoring on the ARM CCI-500/CCI-550 cache
+ coherent interconnects. Both of them provide 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
tristate "ARM CCN driver support"
depends on ARM || ARM64
@@ -1,4 +1,5 @@
# SPDX-License-Identifier: GPL-2.0
+obj-$(CONFIG_ARM_CCI_PMU) += arm-cci.o
obj-$(CONFIG_ARM_CCN) += arm-ccn.o
obj-$(CONFIG_ARM_DSU_PMU) += arm_dsu_pmu.o
obj-$(CONFIG_ARM_PMU) += arm_pmu.o arm_pmu_platform.o
similarity index 75%
copy from drivers/bus/arm-cci.c
copy to drivers/perf/arm-cci.c
@@ -1,18 +1,7 @@
-/*
- * CCI cache coherent interconnect driver
- *
- * Copyright (C) 2013 ARM Ltd.
- * Author: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- *
- * This program is distributed "as is" WITHOUT ANY WARRANTY of any
- * kind, whether express or implied; without even the implied warranty
- * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- */
+// SPDX-License-Identifier: GPL-2.0
+// CCI Cache Coherent Interconnect PMU driver
+// Copyright (C) 2013-2018 Arm Ltd.
+// Author: Punit Agrawal <punit.agrawal@arm.com>, Suzuki Poulose <suzuki.poulose@arm.com>
#include <linux/arm-cci.h>
#include <linux/io.h>
@@ -26,43 +15,9 @@
#include <linux/slab.h>
#include <linux/spinlock.h>
-#include <asm/cacheflush.h>
-#include <asm/smp_plat.h>
+extern void __iomem *const cci_ctrl_base;
-static void __iomem *cci_ctrl_base;
-static unsigned long cci_ctrl_phys;
-
-#ifdef CONFIG_ARM_CCI400_PORT_CTRL
-struct cci_nb_ports {
- unsigned int nb_ace;
- unsigned int nb_ace_lite;
-};
-
-static const struct cci_nb_ports cci400_ports = {
- .nb_ace = 2,
- .nb_ace_lite = 3
-};
-
-#define CCI400_PORTS_DATA (&cci400_ports)
-#else
-#define CCI400_PORTS_DATA (NULL)
-#endif
-
-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_CCI5xx_PMU
- { .compatible = "arm,cci-500", },
- { .compatible = "arm,cci-550", },
-#endif
- {},
-};
-
-#ifdef CONFIG_ARM_CCI_PMU
-
-#define DRIVER_NAME "ARM-CCI"
-#define DRIVER_NAME_PMU DRIVER_NAME " PMU"
+#define DRIVER_NAME "ARM-CCI PMU"
#define CCI_PMCR 0x0100
#define CCI_PID2 0x0fe8
@@ -1268,10 +1223,9 @@ static void cci_pmu_del(struct perf_event *event, int flags)
perf_event_update_userpage(event);
}
-static int
-validate_event(struct pmu *cci_pmu,
- struct cci_pmu_hw_events *hw_events,
- struct perf_event *event)
+static int validate_event(struct pmu *cci_pmu,
+ struct cci_pmu_hw_events *hw_events,
+ struct perf_event *event)
{
if (is_software_event(event))
return 1;
@@ -1293,8 +1247,7 @@ validate_event(struct pmu *cci_pmu,
return pmu_get_event_idx(hw_events, event) >= 0;
}
-static int
-validate_group(struct perf_event *event)
+static int validate_group(struct perf_event *event)
{
struct perf_event *sibling, *leader = event->group_leader;
struct cci_pmu *cci_pmu = to_cci_pmu(event->pmu);
@@ -1322,8 +1275,7 @@ validate_group(struct perf_event *event)
return 0;
}
-static int
-__hw_perf_event_init(struct perf_event *event)
+static int __hw_perf_event_init(struct perf_event *event)
{
struct hw_perf_event *hwc = &event->hw;
int mapping;
@@ -1710,7 +1662,6 @@ static struct cci_pmu *cci_pmu_alloc(struct platform_device *pdev)
return cci_pmu;
}
-
static int cci_pmu_probe(struct platform_device *pdev)
{
struct resource *res;
@@ -1770,30 +1721,14 @@ static int cci_pmu_probe(struct platform_device *pdev)
return 0;
}
-static int cci_platform_probe(struct platform_device *pdev)
-{
- if (!cci_probed())
- return -ENODEV;
-
- return of_platform_populate(pdev->dev.of_node, NULL, NULL, &pdev->dev);
-}
-
static struct platform_driver cci_pmu_driver = {
.driver = {
- .name = DRIVER_NAME_PMU,
+ .name = DRIVER_NAME,
.of_match_table = arm_cci_pmu_matches,
},
.probe = cci_pmu_probe,
};
-static struct platform_driver cci_platform_driver = {
- .driver = {
- .name = DRIVER_NAME,
- .of_match_table = arm_cci_matches,
- },
- .probe = cci_platform_probe,
-};
-
static int __init cci_platform_init(void)
{
int ret;
@@ -1804,521 +1739,9 @@ static int __init cci_platform_init(void)
if (ret)
return ret;
- ret = platform_driver_register(&cci_pmu_driver);
- if (ret)
- return ret;
-
- return platform_driver_register(&cci_platform_driver);
+ return platform_driver_register(&cci_pmu_driver);
}
-#else /* !CONFIG_ARM_CCI_PMU */
-
-static int __init cci_platform_init(void)
-{
- return 0;
-}
-
-#endif /* CONFIG_ARM_CCI_PMU */
-
-#ifdef CONFIG_ARM_CCI400_PORT_CTRL
-
-#define CCI_PORT_CTRL 0x0
-#define CCI_CTRL_STATUS 0xc
-
-#define CCI_ENABLE_SNOOP_REQ 0x1
-#define CCI_ENABLE_DVM_REQ 0x2
-#define CCI_ENABLE_REQ (CCI_ENABLE_SNOOP_REQ | CCI_ENABLE_DVM_REQ)
-
-enum cci_ace_port_type {
- ACE_INVALID_PORT = 0x0,
- ACE_PORT,
- ACE_LITE_PORT,
-};
-
-struct cci_ace_port {
- void __iomem *base;
- unsigned long phys;
- enum cci_ace_port_type type;
- struct device_node *dn;
-};
-
-static struct cci_ace_port *ports;
-static unsigned int nb_cci_ports;
-
-struct cpu_port {
- u64 mpidr;
- u32 port;
-};
-
-/*
- * Use the port MSB as valid flag, shift can be made dynamic
- * by computing number of bits required for port indexes.
- * Code disabling CCI cpu ports runs with D-cache invalidated
- * and SCTLR bit clear so data accesses must be kept to a minimum
- * to improve performance; for now shift is left static to
- * avoid one more data access while disabling the CCI port.
- */
-#define PORT_VALID_SHIFT 31
-#define PORT_VALID (0x1 << PORT_VALID_SHIFT)
-
-static inline void init_cpu_port(struct cpu_port *port, u32 index, u64 mpidr)
-{
- port->port = PORT_VALID | index;
- port->mpidr = mpidr;
-}
-
-static inline bool cpu_port_is_valid(struct cpu_port *port)
-{
- return !!(port->port & PORT_VALID);
-}
-
-static inline bool cpu_port_match(struct cpu_port *port, u64 mpidr)
-{
- return port->mpidr == (mpidr & MPIDR_HWID_BITMASK);
-}
-
-static struct cpu_port cpu_port[NR_CPUS];
-
-/**
- * __cci_ace_get_port - Function to retrieve the port index connected to
- * a cpu or device.
- *
- * @dn: device node of the device to look-up
- * @type: port type
- *
- * Return value:
- * - CCI port index if success
- * - -ENODEV if failure
- */
-static int __cci_ace_get_port(struct device_node *dn, int type)
-{
- int i;
- bool ace_match;
- struct device_node *cci_portn;
-
- cci_portn = of_parse_phandle(dn, "cci-control-port", 0);
- for (i = 0; i < nb_cci_ports; i++) {
- ace_match = ports[i].type == type;
- if (ace_match && cci_portn == ports[i].dn)
- return i;
- }
- return -ENODEV;
-}
-
-int cci_ace_get_port(struct device_node *dn)
-{
- return __cci_ace_get_port(dn, ACE_LITE_PORT);
-}
-EXPORT_SYMBOL_GPL(cci_ace_get_port);
-
-static void cci_ace_init_ports(void)
-{
- int port, cpu;
- struct device_node *cpun;
-
- /*
- * Port index look-up speeds up the function disabling ports by CPU,
- * since the logical to port index mapping is done once and does
- * not change after system boot.
- * The stashed index array is initialized for all possible CPUs
- * at probe time.
- */
- for_each_possible_cpu(cpu) {
- /* too early to use cpu->of_node */
- cpun = of_get_cpu_node(cpu, NULL);
-
- if (WARN(!cpun, "Missing cpu device node\n"))
- continue;
-
- port = __cci_ace_get_port(cpun, ACE_PORT);
- if (port < 0)
- continue;
-
- init_cpu_port(&cpu_port[cpu], port, cpu_logical_map(cpu));
- }
-
- for_each_possible_cpu(cpu) {
- WARN(!cpu_port_is_valid(&cpu_port[cpu]),
- "CPU %u does not have an associated CCI port\n",
- cpu);
- }
-}
-/*
- * Functions to enable/disable a CCI interconnect slave port
- *
- * They are called by low-level power management code to disable slave
- * interfaces snoops and DVM broadcast.
- * Since they may execute with cache data allocation disabled and
- * after the caches have been cleaned and invalidated the functions provide
- * no explicit locking since they may run with D-cache disabled, so normal
- * cacheable kernel locks based on ldrex/strex may not work.
- * Locking has to be provided by BSP implementations to ensure proper
- * operations.
- */
-
-/**
- * cci_port_control() - function to control a CCI port
- *
- * @port: index of the port to setup
- * @enable: if true enables the port, if false disables it
- */
-static void notrace cci_port_control(unsigned int port, bool enable)
-{
- void __iomem *base = ports[port].base;
-
- writel_relaxed(enable ? CCI_ENABLE_REQ : 0, base + CCI_PORT_CTRL);
- /*
- * This function is called from power down procedures
- * and must not execute any instruction that might
- * cause the processor to be put in a quiescent state
- * (eg wfi). Hence, cpu_relax() can not be added to this
- * read loop to optimize power, since it might hide possibly
- * disruptive operations.
- */
- while (readl_relaxed(cci_ctrl_base + CCI_CTRL_STATUS) & 0x1)
- ;
-}
-
-/**
- * cci_disable_port_by_cpu() - function to disable a CCI port by CPU
- * reference
- *
- * @mpidr: mpidr of the CPU whose CCI port should be disabled
- *
- * Disabling a CCI port for a CPU implies disabling the CCI port
- * controlling that CPU cluster. Code disabling CPU CCI ports
- * must make sure that the CPU running the code is the last active CPU
- * in the cluster ie all other CPUs are quiescent in a low power state.
- *
- * Return:
- * 0 on success
- * -ENODEV on port look-up failure
- */
-int notrace cci_disable_port_by_cpu(u64 mpidr)
-{
- int cpu;
- bool is_valid;
- for (cpu = 0; cpu < nr_cpu_ids; cpu++) {
- is_valid = cpu_port_is_valid(&cpu_port[cpu]);
- if (is_valid && cpu_port_match(&cpu_port[cpu], mpidr)) {
- cci_port_control(cpu_port[cpu].port, false);
- return 0;
- }
- }
- return -ENODEV;
-}
-EXPORT_SYMBOL_GPL(cci_disable_port_by_cpu);
-
-/**
- * cci_enable_port_for_self() - enable a CCI port for calling CPU
- *
- * Enabling a CCI port for the calling CPU implies enabling the CCI
- * port controlling that CPU's cluster. Caller must make sure that the
- * CPU running the code is the first active CPU in the cluster and all
- * other CPUs are quiescent in a low power state or waiting for this CPU
- * to complete the CCI initialization.
- *
- * Because this is called when the MMU is still off and with no stack,
- * the code must be position independent and ideally rely on callee
- * clobbered registers only. To achieve this we must code this function
- * entirely in assembler.
- *
- * On success this returns with the proper CCI port enabled. In case of
- * any failure this never returns as the inability to enable the CCI is
- * fatal and there is no possible recovery at this stage.
- */
-asmlinkage void __naked cci_enable_port_for_self(void)
-{
- asm volatile ("\n"
-" .arch armv7-a\n"
-" mrc p15, 0, r0, c0, c0, 5 @ get MPIDR value \n"
-" and r0, r0, #"__stringify(MPIDR_HWID_BITMASK)" \n"
-" adr r1, 5f \n"
-" ldr r2, [r1] \n"
-" add r1, r1, r2 @ &cpu_port \n"
-" add ip, r1, %[sizeof_cpu_port] \n"
-
- /* Loop over the cpu_port array looking for a matching MPIDR */
-"1: ldr r2, [r1, %[offsetof_cpu_port_mpidr_lsb]] \n"
-" cmp r2, r0 @ compare MPIDR \n"
-" bne 2f \n"
-
- /* Found a match, now test port validity */
-" ldr r3, [r1, %[offsetof_cpu_port_port]] \n"
-" tst r3, #"__stringify(PORT_VALID)" \n"
-" bne 3f \n"
-
- /* no match, loop with the next cpu_port entry */
-"2: add r1, r1, %[sizeof_struct_cpu_port] \n"
-" cmp r1, ip @ done? \n"
-" blo 1b \n"
-
- /* CCI port not found -- cheaply try to stall this CPU */
-"cci_port_not_found: \n"
-" wfi \n"
-" wfe \n"
-" b cci_port_not_found \n"
-
- /* Use matched port index to look up the corresponding ports entry */
-"3: bic r3, r3, #"__stringify(PORT_VALID)" \n"
-" adr r0, 6f \n"
-" ldmia r0, {r1, r2} \n"
-" sub r1, r1, r0 @ virt - phys \n"
-" ldr r0, [r0, r2] @ *(&ports) \n"
-" mov r2, %[sizeof_struct_ace_port] \n"
-" mla r0, r2, r3, r0 @ &ports[index] \n"
-" sub r0, r0, r1 @ virt_to_phys() \n"
-
- /* Enable the CCI port */
-" ldr r0, [r0, %[offsetof_port_phys]] \n"
-" mov r3, %[cci_enable_req]\n"
-" str r3, [r0, #"__stringify(CCI_PORT_CTRL)"] \n"
-
- /* poll the status reg for completion */
-" adr r1, 7f \n"
-" ldr r0, [r1] \n"
-" ldr r0, [r0, r1] @ cci_ctrl_base \n"
-"4: ldr r1, [r0, #"__stringify(CCI_CTRL_STATUS)"] \n"
-" tst r1, %[cci_control_status_bits] \n"
-" bne 4b \n"
-
-" mov r0, #0 \n"
-" bx lr \n"
-
-" .align 2 \n"
-"5: .word cpu_port - . \n"
-"6: .word . \n"
-" .word ports - 6b \n"
-"7: .word cci_ctrl_phys - . \n"
- : :
- [sizeof_cpu_port] "i" (sizeof(cpu_port)),
- [cci_enable_req] "i" cpu_to_le32(CCI_ENABLE_REQ),
- [cci_control_status_bits] "i" cpu_to_le32(1),
-#ifndef __ARMEB__
- [offsetof_cpu_port_mpidr_lsb] "i" (offsetof(struct cpu_port, mpidr)),
-#else
- [offsetof_cpu_port_mpidr_lsb] "i" (offsetof(struct cpu_port, mpidr)+4),
-#endif
- [offsetof_cpu_port_port] "i" (offsetof(struct cpu_port, port)),
- [sizeof_struct_cpu_port] "i" (sizeof(struct cpu_port)),
- [sizeof_struct_ace_port] "i" (sizeof(struct cci_ace_port)),
- [offsetof_port_phys] "i" (offsetof(struct cci_ace_port, phys)) );
-
- unreachable();
-}
-
-/**
- * __cci_control_port_by_device() - function to control a CCI port by device
- * reference
- *
- * @dn: device node pointer of the device whose CCI port should be
- * controlled
- * @enable: if true enables the port, if false disables it
- *
- * Return:
- * 0 on success
- * -ENODEV on port look-up failure
- */
-int notrace __cci_control_port_by_device(struct device_node *dn, bool enable)
-{
- int port;
-
- if (!dn)
- return -ENODEV;
-
- port = __cci_ace_get_port(dn, ACE_LITE_PORT);
- if (WARN_ONCE(port < 0, "node %pOF ACE lite port look-up failure\n",
- dn))
- return -ENODEV;
- cci_port_control(port, enable);
- return 0;
-}
-EXPORT_SYMBOL_GPL(__cci_control_port_by_device);
-
-/**
- * __cci_control_port_by_index() - function to control a CCI port by port index
- *
- * @port: port index previously retrieved with cci_ace_get_port()
- * @enable: if true enables the port, if false disables it
- *
- * Return:
- * 0 on success
- * -ENODEV on port index out of range
- * -EPERM if operation carried out on an ACE PORT
- */
-int notrace __cci_control_port_by_index(u32 port, bool enable)
-{
- if (port >= nb_cci_ports || ports[port].type == ACE_INVALID_PORT)
- return -ENODEV;
- /*
- * CCI control for ports connected to CPUS is extremely fragile
- * and must be made to go through a specific and controlled
- * interface (ie cci_disable_port_by_cpu(); control by general purpose
- * indexing is therefore disabled for ACE ports.
- */
- if (ports[port].type == ACE_PORT)
- return -EPERM;
-
- cci_port_control(port, enable);
- return 0;
-}
-EXPORT_SYMBOL_GPL(__cci_control_port_by_index);
-
-static const struct of_device_id arm_cci_ctrl_if_matches[] = {
- {.compatible = "arm,cci-400-ctrl-if", },
- {},
-};
-
-static int cci_probe_ports(struct device_node *np)
-{
- struct cci_nb_ports const *cci_config;
- int ret, i, nb_ace = 0, nb_ace_lite = 0;
- struct device_node *cp;
- struct resource res;
- const char *match_str;
- bool is_ace;
-
-
- cci_config = of_match_node(arm_cci_matches, np)->data;
- if (!cci_config)
- return -ENODEV;
-
- nb_cci_ports = cci_config->nb_ace + cci_config->nb_ace_lite;
-
- ports = kcalloc(nb_cci_ports, sizeof(*ports), GFP_KERNEL);
- if (!ports)
- return -ENOMEM;
-
- for_each_child_of_node(np, cp) {
- if (!of_match_node(arm_cci_ctrl_if_matches, cp))
- continue;
-
- if (!of_device_is_available(cp))
- continue;
-
- i = nb_ace + nb_ace_lite;
-
- if (i >= nb_cci_ports)
- break;
-
- if (of_property_read_string(cp, "interface-type",
- &match_str)) {
- WARN(1, "node %pOF missing interface-type property\n",
- cp);
- continue;
- }
- is_ace = strcmp(match_str, "ace") == 0;
- if (!is_ace && strcmp(match_str, "ace-lite")) {
- WARN(1, "node %pOF containing invalid interface-type property, skipping it\n",
- cp);
- continue;
- }
-
- ret = of_address_to_resource(cp, 0, &res);
- if (!ret) {
- ports[i].base = ioremap(res.start, resource_size(&res));
- ports[i].phys = res.start;
- }
- if (ret || !ports[i].base) {
- WARN(1, "unable to ioremap CCI port %d\n", i);
- continue;
- }
-
- if (is_ace) {
- if (WARN_ON(nb_ace >= cci_config->nb_ace))
- continue;
- ports[i].type = ACE_PORT;
- ++nb_ace;
- } else {
- if (WARN_ON(nb_ace_lite >= cci_config->nb_ace_lite))
- continue;
- ports[i].type = ACE_LITE_PORT;
- ++nb_ace_lite;
- }
- ports[i].dn = cp;
- }
-
- /*
- * If there is no CCI port that is under kernel control
- * return early and report probe status.
- */
- if (!nb_ace && !nb_ace_lite)
- return -ENODEV;
-
- /* initialize a stashed array of ACE ports to speed-up look-up */
- cci_ace_init_ports();
-
- /*
- * Multi-cluster systems may need this data when non-coherent, during
- * cluster power-up/power-down. Make sure it reaches main memory.
- */
- sync_cache_w(&cci_ctrl_base);
- sync_cache_w(&cci_ctrl_phys);
- sync_cache_w(&ports);
- sync_cache_w(&cpu_port);
- __sync_cache_range_w(ports, sizeof(*ports) * nb_cci_ports);
- pr_info("ARM CCI driver probed\n");
-
- return 0;
-}
-#else /* !CONFIG_ARM_CCI400_PORT_CTRL */
-static inline int cci_probe_ports(struct device_node *np)
-{
- return 0;
-}
-#endif /* CONFIG_ARM_CCI400_PORT_CTRL */
-
-static int cci_probe(void)
-{
- int ret;
- struct device_node *np;
- struct resource res;
-
- np = of_find_matching_node(NULL, arm_cci_matches);
- if(!np || !of_device_is_available(np))
- return -ENODEV;
-
- ret = of_address_to_resource(np, 0, &res);
- if (!ret) {
- cci_ctrl_base = ioremap(res.start, resource_size(&res));
- cci_ctrl_phys = res.start;
- }
- if (ret || !cci_ctrl_base) {
- WARN(1, "unable to ioremap CCI ctrl\n");
- return -ENXIO;
- }
-
- return cci_probe_ports(np);
-}
-
-static int cci_init_status = -EAGAIN;
-static DEFINE_MUTEX(cci_probing);
-
-static int cci_init(void)
-{
- if (cci_init_status != -EAGAIN)
- return cci_init_status;
-
- mutex_lock(&cci_probing);
- if (cci_init_status == -EAGAIN)
- cci_init_status = cci_probe();
- mutex_unlock(&cci_probing);
- return cci_init_status;
-}
-
-/*
- * To sort out early init calls ordering a helper function is provided to
- * check if the CCI driver has beed initialized. Function check if the driver
- * has been initialized, if not it calls the init function that probes
- * the driver and updates the return value.
- */
-bool cci_probed(void)
-{
- return cci_init() == 0;
-}
-EXPORT_SYMBOL_GPL(cci_probed);
-
-early_initcall(cci_init);
-core_initcall(cci_platform_init);
+device_initcall(cci_platform_init);
MODULE_LICENSE("GPL");
-MODULE_DESCRIPTION("ARM CCI support");
+MODULE_DESCRIPTION("ARM CCI PMU support");