@@ -1 +1 @@
-obj-$(CONFIG_HISI_PMU) += hisi_uncore_pmu.o
+obj-$(CONFIG_HISI_PMU) += hisi_uncore_pmu.o hisi_uncore_l3c_pmu.o
new file mode 100644
@@ -0,0 +1,538 @@
+/*
+ * HiSilicon SoC L3C uncore Hardware event counters support
+ *
+ * Copyright (C) 2017 Hisilicon Limited
+ * Author: Anurup M <anurup.m@huawei.com>
+ * Shaokun Zhang <zhangshaokun@hisilicon.com>
+ *
+ * This code is based on the uncore PMUs like arm-cci and arm-ccn.
+ *
+ * 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.
+ */
+#include <linux/acpi.h>
+#include <linux/bug.h>
+#include <linux/cpuhotplug.h>
+#include <linux/interrupt.h>
+#include <linux/irq.h>
+#include <linux/list.h>
+#include <linux/platform_device.h>
+#include <linux/topology.h>
+#include "hisi_uncore_pmu.h"
+
+/* L3C register definition */
+#define L3C_PERF_CTRL 0x0408
+#define L3C_INT_MASK 0x0800
+#define L3C_INT_STATUS 0x0808
+#define L3C_INT_CLEAR 0x080c
+#define L3C_EVENT_CTRL 0x1c00
+#define L3C_EVENT_TYPE0 0x1d00
+#define L3C_CNTR0_LOWER 0x1e00
+
+/* L3C has 8-counters and supports 0x60 events */
+#define L3C_NR_COUNTERS 0x8
+#define L3C_NR_EVENTS 0x60
+
+#define L3C_PERF_CTRL_EN 0x20000
+#define L3C_EVTYPE_NONE 0xff
+
+/*
+ * Select the counter register offset using the counter index
+ * every counter is 48-bits and [48:63] is reserved.
+ */
+static u32 get_counter_reg_off(int cntr_idx)
+{
+ return (L3C_CNTR0_LOWER + (cntr_idx * 8));
+}
+
+static u64 hisi_l3c_pmu_read_counter(struct hisi_pmu *l3c_pmu,
+ struct hw_perf_event *hwc)
+{
+ u32 idx = hwc->idx;
+ u32 reg;
+
+ if (!hisi_uncore_pmu_counter_valid(l3c_pmu, idx)) {
+ dev_err(l3c_pmu->dev, "Unsupported event index:%d!\n", idx);
+ return 0;
+ }
+
+ reg = get_counter_reg_off(idx);
+
+ /* Read 64-bits and the upper 16 bits are Read-As-Zero */
+ return readq(l3c_pmu->base + reg);
+}
+
+static void hisi_l3c_pmu_write_counter(struct hisi_pmu *l3c_pmu,
+ struct hw_perf_event *hwc, u64 val)
+{
+ u32 idx = hwc->idx;
+ u32 reg;
+
+ if (!hisi_uncore_pmu_counter_valid(l3c_pmu, idx)) {
+ dev_err(l3c_pmu->dev, "Unsupported event index:%d!\n", idx);
+ return;
+ }
+
+ reg = get_counter_reg_off(idx);
+ /* Write 64-bits and the upper 16 bits are Writes-Ignored */
+ writeq(val, l3c_pmu->base + reg);
+}
+
+static void hisi_l3c_pmu_write_evtype(struct hisi_pmu *l3c_pmu, int idx,
+ u32 type)
+{
+ u32 reg, reg_idx, shift, val;
+
+ /*
+ * Select the appropriate event select register(L3C_EVENT_TYPE0/1).
+ * There are 2 event select registers for the 8 hardware counters.
+ * Event code is 8-bits and for the former 4 hardware counters,
+ * L3C_EVENT_TYPE0 is chosen. For the latter 4 hardware counters,
+ * L3C_EVENT_TYPE1 is chosen.
+ */
+ reg = L3C_EVENT_TYPE0 + (idx / 4) * 4;
+ reg_idx = idx % 4;
+ shift = 8 * reg_idx;
+
+ /* Write event code to L3C_EVENT_TYPEx Register */
+ val = readl(l3c_pmu->base + reg);
+ val &= ~(L3C_EVTYPE_NONE << shift);
+ val |= (type << shift);
+ writel(val, l3c_pmu->base + reg);
+}
+
+static void hisi_l3c_pmu_start_counters(struct hisi_pmu *l3c_pmu)
+{
+ u32 val;
+
+ /*
+ * Set perf_enable bit in L3C_PERF_CTRL register to start counting
+ * for all enabled counters.
+ */
+ val = readl(l3c_pmu->base + L3C_PERF_CTRL);
+ val |= L3C_PERF_CTRL_EN;
+ writel(val, l3c_pmu->base + L3C_PERF_CTRL);
+}
+
+static void hisi_l3c_pmu_stop_counters(struct hisi_pmu *l3c_pmu)
+{
+ u32 val;
+
+ /*
+ * Clear perf_enable bit in L3C_PERF_CTRL register to stop counting
+ * for all enabled counters.
+ */
+ val = readl(l3c_pmu->base + L3C_PERF_CTRL);
+ val &= ~(L3C_PERF_CTRL_EN);
+ writel(val, l3c_pmu->base + L3C_PERF_CTRL);
+}
+
+static void hisi_l3c_pmu_enable_counter(struct hisi_pmu *l3c_pmu,
+ struct hw_perf_event *hwc)
+{
+ u32 val;
+
+ /* Enable counter index in L3C_EVENT_CTRL register */
+ val = readl(l3c_pmu->base + L3C_EVENT_CTRL);
+ val |= (1 << hwc->idx);
+ writel(val, l3c_pmu->base + L3C_EVENT_CTRL);
+}
+
+static void hisi_l3c_pmu_disable_counter(struct hisi_pmu *l3c_pmu,
+ struct hw_perf_event *hwc)
+{
+ u32 val;
+
+ /* Clear counter index in L3C_EVENT_CTRL register */
+ val = readl(l3c_pmu->base + L3C_EVENT_CTRL);
+ val &= ~(1 << hwc->idx);
+ writel(val, l3c_pmu->base + L3C_EVENT_CTRL);
+}
+
+static void hisi_l3c_pmu_enable_counter_int(struct hisi_pmu *l3c_pmu,
+ struct hw_perf_event *hwc)
+{
+ u32 val;
+
+ val = readl(l3c_pmu->base + L3C_INT_MASK);
+ /* Write 0 to enable interrupt */
+ val &= ~(1 << hwc->idx);
+ writel(val, l3c_pmu->base + L3C_INT_MASK);
+}
+
+static void hisi_l3c_pmu_disable_counter_int(struct hisi_pmu *l3c_pmu,
+ struct hw_perf_event *hwc)
+{
+ u32 val;
+
+ val = readl(l3c_pmu->base + L3C_INT_MASK);
+ /* Write 1 to mask interrupt */
+ val |= (1 << hwc->idx);
+ writel(val, l3c_pmu->base + L3C_INT_MASK);
+}
+
+static irqreturn_t hisi_l3c_pmu_isr(int irq, void *dev_id)
+{
+ struct hisi_pmu *l3c_pmu = dev_id;
+ struct perf_event *event;
+ unsigned long overflown;
+ u32 status;
+ int idx;
+
+ /* Read L3C_INT_STATUS register */
+ status = readl(l3c_pmu->base + L3C_INT_STATUS);
+ if (!status)
+ return IRQ_NONE;
+ overflown = status;
+
+ /*
+ * Find the counter index which overflowed if the bit was set
+ * and handle it.
+ */
+ for_each_set_bit(idx, &overflown, L3C_NR_COUNTERS) {
+ /* Write 1 to clear the IRQ status flag */
+ writel((1 << idx), l3c_pmu->base + L3C_INT_CLEAR);
+
+ /* Get the corresponding event struct */
+ event = l3c_pmu->pmu_events.hw_events[idx];
+ if (!event)
+ continue;
+
+ hisi_uncore_pmu_event_update(event);
+ hisi_uncore_pmu_set_event_period(event);
+ }
+
+ return IRQ_HANDLED;
+}
+
+static int hisi_l3c_pmu_init_irq(struct hisi_pmu *l3c_pmu,
+ struct platform_device *pdev)
+{
+ struct device *dev = &pdev->dev;
+ int irq, ret;
+
+ /* Read and init IRQ */
+ irq = platform_get_irq(pdev, 0);
+ if (irq < 0) {
+ dev_err(dev, "irq init: fail L3C overflow interrupt\n");
+ return irq;
+ }
+
+ ret = devm_request_irq(dev, irq, hisi_l3c_pmu_isr,
+ IRQF_NOBALANCING | IRQF_NO_THREAD,
+ dev_name(dev), l3c_pmu);
+ if (ret < 0) {
+ dev_err(dev, "Fail to request IRQ:%d ret:%d\n", irq, ret);
+ return ret;
+ }
+
+ l3c_pmu->irq = irq;
+
+ return 0;
+}
+
+/* Check if the CPU belongs to the SCCL and CCL of PMU */
+static bool hisi_l3c_is_cpu_in_ccl(struct hisi_pmu *l3c_pmu)
+{
+ u32 ccl_id, sccl_id;
+
+ hisi_read_sccl_and_ccl_id(&sccl_id, &ccl_id);
+
+ if (sccl_id != l3c_pmu->sccl_id)
+ return false;
+
+ if (ccl_id != l3c_pmu->ccl_id)
+ return false;
+
+ /* Return true if matched */
+ return true;
+}
+
+static int hisi_l3c_pmu_online_cpu(unsigned int cpu, struct hlist_node *node)
+{
+ struct hisi_pmu *l3c_pmu;
+
+ l3c_pmu = hlist_entry_safe(node, struct hisi_pmu, node);
+
+ /* Proceed only when CPU belongs to the same SCCL and CCL */
+ if (!hisi_l3c_is_cpu_in_ccl(l3c_pmu))
+ return 0;
+
+ /* If another CPU is already managing the CPU cluster, simply return */
+ if (!cpumask_empty(&l3c_pmu->cpus))
+ return 0;
+
+ /* Use this CPU for event counting in the CCL */
+ cpumask_set_cpu(cpu, &l3c_pmu->cpus);
+
+ /* Overflow interrupt also should use the same CPU */
+ WARN_ON(irq_set_affinity(l3c_pmu->irq, &l3c_pmu->cpus));
+
+ return 0;
+}
+
+static int hisi_l3c_pmu_offline_cpu(unsigned int cpu, struct hlist_node *node)
+{
+ struct hisi_pmu *l3c_pmu;
+ cpumask_t ccl_online_cpus;
+ unsigned int target;
+
+ l3c_pmu = hlist_entry_safe(node, struct hisi_pmu, node);
+
+ /* Proceed only when CPU belongs to the same SCCL and CCL */
+ if (!hisi_l3c_is_cpu_in_ccl(l3c_pmu))
+ return 0;
+
+ /* Proceed if this CPU is used for event counting */
+ if (!cpumask_test_cpu(cpu, &l3c_pmu->cpus))
+ return 0;
+
+ /* Give up ownership of CCL */
+ cpumask_test_and_clear_cpu(cpu, &l3c_pmu->cpus);
+
+ /* Any other CPU for this CCL which is still online */
+ cpumask_and(&ccl_online_cpus, cpu_coregroup_mask(cpu),
+ cpu_online_mask);
+ target = cpumask_any_but(&ccl_online_cpus, cpu);
+ if (target >= nr_cpu_ids)
+ return 0;
+
+ perf_pmu_migrate_context(&l3c_pmu->pmu, cpu, target);
+ /* Use this CPU for event counting in the CCL */
+ cpumask_set_cpu(target, &l3c_pmu->cpus);
+
+ return 0;
+}
+
+static const struct acpi_device_id hisi_l3c_pmu_acpi_match[] = {
+ { "HISI0213", },
+ {},
+};
+MODULE_DEVICE_TABLE(acpi, hisi_l3c_pmu_acpi_match);
+
+static int hisi_l3c_pmu_init_data(struct platform_device *pdev,
+ struct hisi_pmu *l3c_pmu)
+{
+ struct device *dev = &pdev->dev;
+ struct resource *res;
+ unsigned long long id;
+ acpi_status status;
+
+ status = acpi_evaluate_integer(ACPI_HANDLE(dev), "_UID", NULL, &id);
+ if (ACPI_FAILURE(status))
+ return false;
+
+ l3c_pmu->l3c_tag_id = id;
+
+ /* Get the L3C SCCL ID */
+ if (device_property_read_u32(dev, "hisilicon,scl-id",
+ &l3c_pmu->sccl_id)) {
+ dev_err(dev, "Can not read l3c sccl-id!\n");
+ return -EINVAL;
+ }
+
+ /* Get the L3C CPU cluster(CCL) ID */
+ if (device_property_read_u32(dev, "hisilicon,ccl-id",
+ &l3c_pmu->ccl_id)) {
+ dev_err(dev, "Can not read l3c ccl-id!\n");
+ return -EINVAL;
+ }
+
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ l3c_pmu->base = devm_ioremap_resource(dev, res);
+ if (IS_ERR(l3c_pmu->base)) {
+ dev_err(dev, "ioremap failed for l3c_pmu resource\n");
+ return PTR_ERR(l3c_pmu->base);
+ }
+
+ return 0;
+}
+
+static struct attribute *hisi_l3c_pmu_format_attr[] = {
+ HISI_PMU_FORMAT_ATTR(event, "config:0-7"),
+ NULL,
+};
+
+static const struct attribute_group hisi_l3c_pmu_format_group = {
+ .name = "format",
+ .attrs = hisi_l3c_pmu_format_attr,
+};
+
+static struct attribute *hisi_l3c_pmu_events_attr[] = {
+ HISI_PMU_EVENT_ATTR(rd_cpipe, 0x00),
+ HISI_PMU_EVENT_ATTR(wr_cpipe, 0x01),
+ HISI_PMU_EVENT_ATTR(rd_hit_cpipe, 0x02),
+ HISI_PMU_EVENT_ATTR(wr_hit_cpipe, 0x03),
+ HISI_PMU_EVENT_ATTR(victim_num, 0x04),
+ HISI_PMU_EVENT_ATTR(rd_spipe, 0x20),
+ HISI_PMU_EVENT_ATTR(wr_spipe, 0x21),
+ HISI_PMU_EVENT_ATTR(rd_hit_spipe, 0x22),
+ HISI_PMU_EVENT_ATTR(wr_hit_spipe, 0x23),
+ HISI_PMU_EVENT_ATTR(back_invalid, 0x29),
+ HISI_PMU_EVENT_ATTR(retry_cpu, 0x40),
+ HISI_PMU_EVENT_ATTR(retry_ring, 0x41),
+ HISI_PMU_EVENT_ATTR(prefetch_drop, 0x42),
+ NULL,
+};
+
+static const struct attribute_group hisi_l3c_pmu_events_group = {
+ .name = "events",
+ .attrs = hisi_l3c_pmu_events_attr,
+};
+
+static DEVICE_ATTR(cpumask, 0444, hisi_cpumask_sysfs_show, NULL);
+
+static struct attribute *hisi_l3c_pmu_cpumask_attrs[] = {
+ &dev_attr_cpumask.attr,
+ NULL,
+};
+
+static const struct attribute_group hisi_l3c_pmu_cpumask_attr_group = {
+ .attrs = hisi_l3c_pmu_cpumask_attrs,
+};
+
+static const struct attribute_group *hisi_l3c_pmu_attr_groups[] = {
+ &hisi_l3c_pmu_format_group,
+ &hisi_l3c_pmu_events_group,
+ &hisi_l3c_pmu_cpumask_attr_group,
+ NULL,
+};
+
+static const struct hisi_uncore_ops hisi_uncore_l3c_ops = {
+ .write_evtype = hisi_l3c_pmu_write_evtype,
+ .get_event_idx = hisi_uncore_pmu_get_event_idx,
+ .start_counters = hisi_l3c_pmu_start_counters,
+ .stop_counters = hisi_l3c_pmu_stop_counters,
+ .enable_counter = hisi_l3c_pmu_enable_counter,
+ .disable_counter = hisi_l3c_pmu_disable_counter,
+ .enable_counter_int = hisi_l3c_pmu_enable_counter_int,
+ .disable_counter_int = hisi_l3c_pmu_disable_counter_int,
+ .write_counter = hisi_l3c_pmu_write_counter,
+ .read_counter = hisi_l3c_pmu_read_counter,
+};
+
+static int hisi_l3c_pmu_dev_probe(struct platform_device *pdev,
+ struct hisi_pmu *l3c_pmu)
+{
+ struct device *dev = &pdev->dev;
+ int ret;
+
+ ret = hisi_l3c_pmu_init_data(pdev, l3c_pmu);
+ if (ret)
+ return ret;
+
+ ret = hisi_l3c_pmu_init_irq(l3c_pmu, pdev);
+ if (ret)
+ return ret;
+
+ l3c_pmu->name = devm_kasprintf(dev, GFP_KERNEL, "hisi_l3c%u_%u",
+ l3c_pmu->l3c_tag_id, l3c_pmu->sccl_id);
+ l3c_pmu->num_events = L3C_NR_EVENTS;
+ l3c_pmu->num_counters = L3C_NR_COUNTERS;
+ l3c_pmu->counter_bits = 48;
+ l3c_pmu->ops = &hisi_uncore_l3c_ops;
+ l3c_pmu->dev = dev;
+
+ return 0;
+}
+
+static int hisi_l3c_pmu_probe(struct platform_device *pdev)
+{
+ struct device *dev = &pdev->dev;
+ struct hisi_pmu *l3c_pmu;
+ int ret;
+
+ l3c_pmu = hisi_pmu_alloc(dev, L3C_NR_COUNTERS);
+ if (!l3c_pmu)
+ return -ENOMEM;
+
+ platform_set_drvdata(pdev, l3c_pmu);
+
+ ret = hisi_l3c_pmu_dev_probe(pdev, l3c_pmu);
+ if (ret)
+ return ret;
+
+ ret = cpuhp_state_add_instance(CPUHP_AP_PERF_ARM_HISI_L3_ONLINE,
+ &l3c_pmu->node);
+ if (ret) {
+ dev_err(dev, "Error %d registering hotplug\n", ret);
+ return ret;
+ }
+
+ l3c_pmu->pmu = (struct pmu) {
+ .name = l3c_pmu->name,
+ .task_ctx_nr = perf_invalid_context,
+ .event_init = hisi_uncore_pmu_event_init,
+ .pmu_enable = hisi_uncore_pmu_enable,
+ .pmu_disable = hisi_uncore_pmu_disable,
+ .add = hisi_uncore_pmu_add,
+ .del = hisi_uncore_pmu_del,
+ .start = hisi_uncore_pmu_start,
+ .stop = hisi_uncore_pmu_stop,
+ .read = hisi_uncore_pmu_read,
+ .attr_groups = hisi_l3c_pmu_attr_groups,
+ };
+
+ ret = perf_pmu_register(&l3c_pmu->pmu, l3c_pmu->name, -1);
+ if (ret) {
+ dev_err(l3c_pmu->dev, "l3c_pmu register failed!\n");
+ cpuhp_state_remove_instance(CPUHP_AP_PERF_ARM_HISI_L3_ONLINE,
+ &l3c_pmu->node);
+ }
+
+ return ret;
+}
+
+static int hisi_l3c_pmu_remove(struct platform_device *pdev)
+{
+ struct hisi_pmu *l3c_pmu = platform_get_drvdata(pdev);
+
+ perf_pmu_unregister(&l3c_pmu->pmu);
+ cpuhp_state_remove_instance(CPUHP_AP_PERF_ARM_HISI_L3_ONLINE,
+ &l3c_pmu->node);
+
+ return 0;
+}
+
+static struct platform_driver hisi_l3c_pmu_driver = {
+ .driver = {
+ .name = "hisi_l3c_pmu",
+ .acpi_match_table = ACPI_PTR(hisi_l3c_pmu_acpi_match),
+ },
+ .probe = hisi_l3c_pmu_probe,
+ .remove = hisi_l3c_pmu_remove,
+};
+
+static int __init hisi_l3c_pmu_module_init(void)
+{
+ int ret;
+
+ ret = cpuhp_setup_state_multi(CPUHP_AP_PERF_ARM_HISI_L3_ONLINE,
+ "AP_PERF_ARM_HISI_L3_ONLINE",
+ hisi_l3c_pmu_online_cpu,
+ hisi_l3c_pmu_offline_cpu);
+ if (ret) {
+ pr_err("l3c_pmu_module_init: Error setup hotplug, ret=%d", ret);
+ return ret;
+ }
+
+ ret = platform_driver_register(&hisi_l3c_pmu_driver);
+ if (ret)
+ cpuhp_remove_multi_state(CPUHP_AP_PERF_ARM_HISI_L3_ONLINE);
+
+ return ret;
+}
+module_init(hisi_l3c_pmu_module_init);
+
+static void __exit hisi_l3c_pmu_module_exit(void)
+{
+ platform_driver_unregister(&hisi_l3c_pmu_driver);
+ cpuhp_remove_multi_state(CPUHP_AP_PERF_ARM_HISI_L3_ONLINE);
+}
+module_exit(hisi_l3c_pmu_module_exit);
+
+MODULE_DESCRIPTION("HiSilicon SoC L3C uncore PMU driver");
+MODULE_LICENSE("GPL v2");
+MODULE_AUTHOR("Anurup M <anurup.m@huawei.com>");
+MODULE_AUTHOR("Shaokun Zhang <zhangshaokun@hisilicon.com>");
@@ -136,6 +136,7 @@ enum cpuhp_state {
CPUHP_AP_PERF_S390_SF_ONLINE,
CPUHP_AP_PERF_ARM_CCI_ONLINE,
CPUHP_AP_PERF_ARM_CCN_ONLINE,
+ CPUHP_AP_PERF_ARM_HISI_L3_ONLINE,
CPUHP_AP_PERF_ARM_L2X0_ONLINE,
CPUHP_AP_PERF_ARM_QCOM_L2_ONLINE,
CPUHP_AP_PERF_ARM_QCOM_L3_ONLINE,