diff options
| -rw-r--r-- | drivers/bus/arm-cci.c | 141 |
1 files changed, 81 insertions, 60 deletions
diff --git a/drivers/bus/arm-cci.c b/drivers/bus/arm-cci.c index 5d29ec3..ae3864d 100644 --- a/drivers/bus/arm-cci.c +++ b/drivers/bus/arm-cci.c @@ -79,19 +79,38 @@ static const struct of_device_id arm_cci_matches[] = { #define CCI_PMU_MAX_HW_EVENTS 5 /* CCI PMU has 4 counters + 1 cycle counter */ +/* Types of interfaces that can generate events */ +enum { + CCI_IF_SLAVE, + CCI_IF_MASTER, + CCI_IF_MAX, +}; + +struct event_range { + u32 min; + u32 max; +}; + struct cci_pmu_hw_events { struct perf_event *events[CCI_PMU_MAX_HW_EVENTS]; unsigned long used_mask[BITS_TO_LONGS(CCI_PMU_MAX_HW_EVENTS)]; raw_spinlock_t pmu_lock; }; +struct cci_pmu_model { + char *name; + struct event_range event_ranges[CCI_IF_MAX]; +}; + +static struct cci_pmu_model cci_pmu_models[]; + struct cci_pmu { void __iomem *base; struct pmu pmu; int nr_irqs; int irqs[CCI_PMU_MAX_HW_EVENTS]; unsigned long active_irqs; - struct pmu_port_event_ranges *port_ranges; + const struct cci_pmu_model *model; struct cci_pmu_hw_events hw_events; struct platform_device *plat_device; int num_events; @@ -152,53 +171,11 @@ enum cci400_perf_events { #define CCI_REV_R1_MASTER_PORT_MIN_EV 0x00 #define CCI_REV_R1_MASTER_PORT_MAX_EV 0x11 -struct pmu_port_event_ranges { - u8 slave_min; - u8 slave_max; - u8 master_min; - u8 master_max; -}; - -static struct pmu_port_event_ranges port_event_range[] = { - [CCI_REV_R0] = { - .slave_min = CCI_REV_R0_SLAVE_PORT_MIN_EV, - .slave_max = CCI_REV_R0_SLAVE_PORT_MAX_EV, - .master_min = CCI_REV_R0_MASTER_PORT_MIN_EV, - .master_max = CCI_REV_R0_MASTER_PORT_MAX_EV, - }, - [CCI_REV_R1] = { - .slave_min = CCI_REV_R1_SLAVE_PORT_MIN_EV, - .slave_max = CCI_REV_R1_SLAVE_PORT_MAX_EV, - .master_min = CCI_REV_R1_MASTER_PORT_MIN_EV, - .master_max = CCI_REV_R1_MASTER_PORT_MAX_EV, - }, -}; - -/* - * Export different PMU names for the different revisions so userspace knows - * because the event ids are different - */ -static char *const pmu_names[] = { - [CCI_REV_R0] = "CCI_400", - [CCI_REV_R1] = "CCI_400_r1", -}; - -static int pmu_is_valid_slave_event(u8 ev_code) -{ - return pmu->port_ranges->slave_min <= ev_code && - ev_code <= pmu->port_ranges->slave_max; -} - -static int pmu_is_valid_master_event(u8 ev_code) -{ - return pmu->port_ranges->master_min <= ev_code && - ev_code <= pmu->port_ranges->master_max; -} - static int pmu_validate_hw_event(u8 hw_event) { u8 ev_source = CCI_PMU_EVENT_SOURCE(hw_event); u8 ev_code = CCI_PMU_EVENT_CODE(hw_event); + int if_type; switch (ev_source) { case CCI_PORT_S0: @@ -207,18 +184,22 @@ static int pmu_validate_hw_event(u8 hw_event) case CCI_PORT_S3: case CCI_PORT_S4: /* Slave Interface */ - if (pmu_is_valid_slave_event(ev_code)) - return hw_event; + if_type = CCI_IF_SLAVE; break; case CCI_PORT_M0: case CCI_PORT_M1: case CCI_PORT_M2: /* Master Interface */ - if (pmu_is_valid_master_event(ev_code)) - return hw_event; + if_type = CCI_IF_MASTER; break; + default: + return -ENOENT; } + if (ev_code >= pmu->model->event_ranges[if_type].min && + ev_code <= pmu->model->event_ranges[if_type].max) + return hw_event; + return -ENOENT; } @@ -234,11 +215,9 @@ static int probe_cci_revision(void) return CCI_REV_R1; } -static struct pmu_port_event_ranges *port_range_by_rev(void) +static const struct cci_pmu_model *probe_cci_model(struct platform_device *pdev) { - int rev = probe_cci_revision(); - - return &port_event_range[rev]; + return &cci_pmu_models[probe_cci_revision()]; } static int pmu_is_valid_counter(struct cci_pmu *cci_pmu, int idx) @@ -816,9 +795,9 @@ static const struct attribute_group *pmu_attr_groups[] = { static int cci_pmu_init(struct cci_pmu *cci_pmu, struct platform_device *pdev) { - char *name = pmu_names[probe_cci_revision()]; + char *name = cci_pmu->model->name; cci_pmu->pmu = (struct pmu) { - .name = pmu_names[probe_cci_revision()], + .name = cci_pmu->model->name, .task_ctx_nr = perf_invalid_context, .pmu_enable = cci_pmu_enable, .pmu_disable = cci_pmu_disable, @@ -871,6 +850,35 @@ static struct notifier_block cci_pmu_cpu_nb = { .priority = CPU_PRI_PERF + 1, }; +static struct cci_pmu_model cci_pmu_models[] = { + [CCI_REV_R0] = { + .name = "CCI_400", + .event_ranges = { + [CCI_IF_SLAVE] = { + CCI_REV_R0_SLAVE_PORT_MIN_EV, + CCI_REV_R0_SLAVE_PORT_MAX_EV, + }, + [CCI_IF_MASTER] = { + CCI_REV_R0_MASTER_PORT_MIN_EV, + CCI_REV_R0_MASTER_PORT_MAX_EV, + }, + }, + }, + [CCI_REV_R1] = { + .name = "CCI_400_r1", + .event_ranges = { + [CCI_IF_SLAVE] = { + CCI_REV_R1_SLAVE_PORT_MIN_EV, + CCI_REV_R1_SLAVE_PORT_MAX_EV, + }, + [CCI_IF_MASTER] = { + CCI_REV_R1_MASTER_PORT_MIN_EV, + CCI_REV_R1_MASTER_PORT_MAX_EV, + }, + }, + }, +}; + static const struct of_device_id arm_cci_pmu_matches[] = { { .compatible = "arm,cci-400-pmu", @@ -878,6 +886,16 @@ static const struct of_device_id arm_cci_pmu_matches[] = { {}, }; +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; + + return probe_cci_model(pdev); +} + static bool is_duplicate_irq(int irq, int *irqs, int nr_irqs) { int i; @@ -893,11 +911,19 @@ static int cci_pmu_probe(struct platform_device *pdev) { struct resource *res; int i, ret, irq; + const struct cci_pmu_model *model; + + model = get_cci_model(pdev); + if (!model) { + dev_warn(&pdev->dev, "CCI PMU version not supported\n"); + return -ENODEV; + } pmu = devm_kzalloc(&pdev->dev, sizeof(*pmu), GFP_KERNEL); if (!pmu) return -ENOMEM; + pmu->model = model; res = platform_get_resource(pdev, IORESOURCE_MEM, 0); pmu->base = devm_ioremap_resource(&pdev->dev, res); if (IS_ERR(pmu->base)) @@ -929,12 +955,6 @@ static int cci_pmu_probe(struct platform_device *pdev) return -EINVAL; } - pmu->port_ranges = port_range_by_rev(); - if (!pmu->port_ranges) { - dev_warn(&pdev->dev, "CCI PMU version not supported\n"); - return -EINVAL; - } - raw_spin_lock_init(&pmu->hw_events.pmu_lock); mutex_init(&pmu->reserve_mutex); atomic_set(&pmu->active_events, 0); @@ -948,6 +968,7 @@ static int cci_pmu_probe(struct platform_device *pdev) if (ret) return ret; + pr_info("ARM %s PMU driver probed", pmu->model->name); return 0; } |
