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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-06-19 21:00:37 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-06-19 21:00:37 +0000 |
commit | 94ac2ab3fff96814d7460a27a0e9d004abbd4128 (patch) | |
tree | 9a4eb8cc234b540b0f4b93363109cdd37a20540b /drivers/perf/arm_cspmu/arm_cspmu.c | |
parent | Adding debian version 6.8.12-1. (diff) | |
download | linux-94ac2ab3fff96814d7460a27a0e9d004abbd4128.tar.xz linux-94ac2ab3fff96814d7460a27a0e9d004abbd4128.zip |
Merging upstream version 6.9.2.
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'drivers/perf/arm_cspmu/arm_cspmu.c')
-rw-r--r-- | drivers/perf/arm_cspmu/arm_cspmu.c | 159 |
1 files changed, 88 insertions, 71 deletions
diff --git a/drivers/perf/arm_cspmu/arm_cspmu.c b/drivers/perf/arm_cspmu/arm_cspmu.c index 50b89b989c..b9a252272f 100644 --- a/drivers/perf/arm_cspmu/arm_cspmu.c +++ b/drivers/perf/arm_cspmu/arm_cspmu.c @@ -27,6 +27,7 @@ #include <linux/io-64-nonatomic-lo-hi.h> #include <linux/module.h> #include <linux/mutex.h> +#include <linux/of.h> #include <linux/perf_event.h> #include <linux/platform_device.h> @@ -100,13 +101,6 @@ #define ARM_CSPMU_ACTIVE_CPU_MASK 0x0 #define ARM_CSPMU_ASSOCIATED_CPU_MASK 0x1 -/* Check and use default if implementer doesn't provide attribute callback */ -#define CHECK_DEFAULT_IMPL_OPS(ops, callback) \ - do { \ - if (!ops->callback) \ - ops->callback = arm_cspmu_ ## callback; \ - } while (0) - /* * Maximum poll count for reading counter value using high-low-high sequence. */ @@ -121,7 +115,9 @@ static void arm_cspmu_set_ev_filter(struct arm_cspmu *cspmu, static struct acpi_apmt_node *arm_cspmu_apmt_node(struct device *dev) { - return *(struct acpi_apmt_node **)dev_get_platdata(dev); + struct acpi_apmt_node **ptr = dev_get_platdata(dev); + + return ptr ? *ptr : NULL; } /* @@ -317,6 +313,10 @@ static const char *arm_cspmu_get_name(const struct arm_cspmu *cspmu) dev = cspmu->dev; apmt_node = arm_cspmu_apmt_node(dev); + if (!apmt_node) + return devm_kasprintf(dev, GFP_KERNEL, PMUNAME "_%u", + atomic_fetch_inc(&pmu_idx[0])); + pmu_type = apmt_node->type; if (pmu_type >= ACPI_APMT_NODE_TYPE_COUNT) { @@ -408,21 +408,32 @@ static struct arm_cspmu_impl_match *arm_cspmu_impl_match_get(u32 pmiidr) return NULL; } +#define DEFAULT_IMPL_OP(name) .name = arm_cspmu_##name + static int arm_cspmu_init_impl_ops(struct arm_cspmu *cspmu) { int ret = 0; - struct arm_cspmu_impl_ops *impl_ops = &cspmu->impl.ops; struct acpi_apmt_node *apmt_node = arm_cspmu_apmt_node(cspmu->dev); struct arm_cspmu_impl_match *match; - /* - * Get PMU implementer and product id from APMT node. - * If APMT node doesn't have implementer/product id, try get it - * from PMIIDR. - */ - cspmu->impl.pmiidr = - (apmt_node->impl_id) ? apmt_node->impl_id : - readl(cspmu->base0 + PMIIDR); + /* Start with a default PMU implementation */ + cspmu->impl.module = THIS_MODULE; + cspmu->impl.pmiidr = readl(cspmu->base0 + PMIIDR); + cspmu->impl.ops = (struct arm_cspmu_impl_ops) { + DEFAULT_IMPL_OP(get_event_attrs), + DEFAULT_IMPL_OP(get_format_attrs), + DEFAULT_IMPL_OP(get_identifier), + DEFAULT_IMPL_OP(get_name), + DEFAULT_IMPL_OP(is_cycle_counter_event), + DEFAULT_IMPL_OP(event_type), + DEFAULT_IMPL_OP(event_filter), + DEFAULT_IMPL_OP(set_ev_filter), + DEFAULT_IMPL_OP(event_attr_is_visible), + }; + + /* Firmware may override implementer/product ID from PMIIDR */ + if (apmt_node && apmt_node->impl_id) + cspmu->impl.pmiidr = apmt_node->impl_id; /* Find implementer specific attribute ops. */ match = arm_cspmu_impl_match_get(cspmu->impl.pmiidr); @@ -450,24 +461,9 @@ static int arm_cspmu_init_impl_ops(struct arm_cspmu *cspmu) } mutex_unlock(&arm_cspmu_lock); + } - if (ret) - return ret; - } else - cspmu->impl.module = THIS_MODULE; - - /* Use default callbacks if implementer doesn't provide one. */ - CHECK_DEFAULT_IMPL_OPS(impl_ops, get_event_attrs); - CHECK_DEFAULT_IMPL_OPS(impl_ops, get_format_attrs); - CHECK_DEFAULT_IMPL_OPS(impl_ops, get_identifier); - CHECK_DEFAULT_IMPL_OPS(impl_ops, get_name); - CHECK_DEFAULT_IMPL_OPS(impl_ops, is_cycle_counter_event); - CHECK_DEFAULT_IMPL_OPS(impl_ops, event_type); - CHECK_DEFAULT_IMPL_OPS(impl_ops, event_filter); - CHECK_DEFAULT_IMPL_OPS(impl_ops, event_attr_is_visible); - CHECK_DEFAULT_IMPL_OPS(impl_ops, set_ev_filter); - - return 0; + return ret; } static struct attribute_group * @@ -512,23 +508,16 @@ arm_cspmu_alloc_format_attr_group(struct arm_cspmu *cspmu) return format_group; } -static struct attribute_group ** -arm_cspmu_alloc_attr_group(struct arm_cspmu *cspmu) +static int arm_cspmu_alloc_attr_groups(struct arm_cspmu *cspmu) { - struct attribute_group **attr_groups = NULL; - struct device *dev = cspmu->dev; + const struct attribute_group **attr_groups = cspmu->attr_groups; const struct arm_cspmu_impl_ops *impl_ops = &cspmu->impl.ops; cspmu->identifier = impl_ops->get_identifier(cspmu); cspmu->name = impl_ops->get_name(cspmu); if (!cspmu->identifier || !cspmu->name) - return NULL; - - attr_groups = devm_kcalloc(dev, 5, sizeof(struct attribute_group *), - GFP_KERNEL); - if (!attr_groups) - return NULL; + return -ENOMEM; attr_groups[0] = arm_cspmu_alloc_event_attr_group(cspmu); attr_groups[1] = arm_cspmu_alloc_format_attr_group(cspmu); @@ -536,18 +525,14 @@ arm_cspmu_alloc_attr_group(struct arm_cspmu *cspmu) attr_groups[3] = &arm_cspmu_cpumask_attr_group; if (!attr_groups[0] || !attr_groups[1]) - return NULL; + return -ENOMEM; - return attr_groups; + return 0; } static inline void arm_cspmu_reset_counters(struct arm_cspmu *cspmu) { - u32 pmcr = 0; - - pmcr |= PMCR_P; - pmcr |= PMCR_C; - writel(pmcr, cspmu->base0 + PMCR); + writel(PMCR_C | PMCR_P, cspmu->base0 + PMCR); } static inline void arm_cspmu_start_counters(struct arm_cspmu *cspmu) @@ -962,7 +947,14 @@ static struct arm_cspmu *arm_cspmu_alloc(struct platform_device *pdev) platform_set_drvdata(pdev, cspmu); apmt_node = arm_cspmu_apmt_node(dev); - cspmu->has_atomic_dword = apmt_node->flags & ACPI_APMT_FLAGS_ATOMIC; + if (apmt_node) { + cspmu->has_atomic_dword = apmt_node->flags & ACPI_APMT_FLAGS_ATOMIC; + } else { + u32 width = 0; + + device_property_read_u32(dev, "reg-io-width", &width); + cspmu->has_atomic_dword = (width == 8); + } return cspmu; } @@ -1153,11 +1145,6 @@ static int arm_cspmu_acpi_get_cpus(struct arm_cspmu *cspmu) } } - if (cpumask_empty(&cspmu->associated_cpus)) { - dev_dbg(cspmu->dev, "No cpu associated with the PMU\n"); - return -ENODEV; - } - return 0; } #else @@ -1167,19 +1154,45 @@ static int arm_cspmu_acpi_get_cpus(struct arm_cspmu *cspmu) } #endif +static int arm_cspmu_of_get_cpus(struct arm_cspmu *cspmu) +{ + struct of_phandle_iterator it; + int ret, cpu; + + of_for_each_phandle(&it, ret, dev_of_node(cspmu->dev), "cpus", NULL, 0) { + cpu = of_cpu_node_to_id(it.node); + if (cpu < 0) + continue; + cpumask_set_cpu(cpu, &cspmu->associated_cpus); + } + return ret == -ENOENT ? 0 : ret; +} + static int arm_cspmu_get_cpus(struct arm_cspmu *cspmu) { - return arm_cspmu_acpi_get_cpus(cspmu); + int ret = 0; + + if (arm_cspmu_apmt_node(cspmu->dev)) + ret = arm_cspmu_acpi_get_cpus(cspmu); + else if (device_property_present(cspmu->dev, "cpus")) + ret = arm_cspmu_of_get_cpus(cspmu); + else + cpumask_copy(&cspmu->associated_cpus, cpu_possible_mask); + + if (!ret && cpumask_empty(&cspmu->associated_cpus)) { + dev_dbg(cspmu->dev, "No cpu associated with the PMU\n"); + ret = -ENODEV; + } + return ret; } static int arm_cspmu_register_pmu(struct arm_cspmu *cspmu) { int ret, capabilities; - struct attribute_group **attr_groups; - attr_groups = arm_cspmu_alloc_attr_group(cspmu); - if (!attr_groups) - return -ENOMEM; + ret = arm_cspmu_alloc_attr_groups(cspmu); + if (ret) + return ret; ret = cpuhp_state_add_instance(arm_cspmu_cpuhp_state, &cspmu->cpuhp_node); @@ -1201,12 +1214,11 @@ static int arm_cspmu_register_pmu(struct arm_cspmu *cspmu) .start = arm_cspmu_start, .stop = arm_cspmu_stop, .read = arm_cspmu_read, - .attr_groups = (const struct attribute_group **)attr_groups, + .attr_groups = cspmu->attr_groups, .capabilities = capabilities, }; /* Hardware counter init */ - arm_cspmu_stop_counters(cspmu); arm_cspmu_reset_counters(cspmu); ret = perf_pmu_register(&cspmu->pmu, cspmu->name, -1); @@ -1252,14 +1264,12 @@ static int arm_cspmu_device_probe(struct platform_device *pdev) return ret; } -static int arm_cspmu_device_remove(struct platform_device *pdev) +static void arm_cspmu_device_remove(struct platform_device *pdev) { struct arm_cspmu *cspmu = platform_get_drvdata(pdev); perf_pmu_unregister(&cspmu->pmu); cpuhp_state_remove_instance(arm_cspmu_cpuhp_state, &cspmu->cpuhp_node); - - return 0; } static const struct platform_device_id arm_cspmu_id[] = { @@ -1268,13 +1278,20 @@ static const struct platform_device_id arm_cspmu_id[] = { }; MODULE_DEVICE_TABLE(platform, arm_cspmu_id); +static const struct of_device_id arm_cspmu_of_match[] = { + { .compatible = "arm,coresight-pmu" }, + {} +}; +MODULE_DEVICE_TABLE(of, arm_cspmu_of_match); + static struct platform_driver arm_cspmu_driver = { .driver = { - .name = DRVNAME, - .suppress_bind_attrs = true, - }, + .name = DRVNAME, + .of_match_table = arm_cspmu_of_match, + .suppress_bind_attrs = true, + }, .probe = arm_cspmu_device_probe, - .remove = arm_cspmu_device_remove, + .remove_new = arm_cspmu_device_remove, .id_table = arm_cspmu_id, }; 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