@@ -1,3 +1,4 @@
# SPDX-License-Identifier: GPL-2.0-only
obj-$(CONFIG_HISI_PMU) += hisi_uncore_pmu.o hisi_uncore_l3c_pmu.o \
- hisi_uncore_hha_pmu.o hisi_uncore_ddrc_pmu.o hisi_uncore_sllc_pmu.o
+ hisi_uncore_hha_pmu.o hisi_uncore_ddrc_pmu.o hisi_uncore_sllc_pmu.o \
+ hisi_uncore_pa_pmu.o
new file mode 100644
@@ -0,0 +1,500 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * HiSilicon PA uncore Hardware event counters support
+ *
+ * Copyright (C) 2020 HiSilicon Limited
+ * Author: Shaokun Zhang <zhangshaokun@hisilicon.com>
+ *
+ * This code is based on the uncore PMUs like arm-cci and arm-ccn.
+ */
+#include <linux/acpi.h>
+#include <linux/cpuhotplug.h>
+#include <linux/interrupt.h>
+#include <linux/irq.h>
+#include <linux/list.h>
+#include <linux/smp.h>
+
+#include "hisi_uncore_pmu.h"
+
+/* PA register definition */
+#define PA_PERF_CTRL 0x1c00
+#define PA_EVENT_CTRL 0x1c04
+#define PA_TT_CTRL 0x1c08
+#define PA_TGTID_CTRL 0x1c14
+#define PA_SRCID_CTRL 0x1c18
+#define PA_INT_MASK 0x1c70
+#define PA_INT_STATUS 0x1c78
+#define PA_INT_CLEAR 0x1c7c
+#define PA_EVENT_TYPE0 0x1c80
+#define PA_PMU_VERSION 0x1cf0
+#define PA_EVENT_CNT0_L 0x1f00
+
+#define PA_EVTYPE_MASK 0xff
+#define PA_NR_COUNTERS 0x8
+#define PA_PERF_CTRL_EN BIT(0)
+#define PA_TRACETAG_EN BIT(4)
+#define PA_TGTID_EN BIT(11)
+#define PA_SRCID_EN BIT(11)
+#define PA_TGTID_NONE 0
+#define PA_SRCID_NONE 0
+#define PA_TGTID_MASK_SHIFT 12
+#define PA_SRCID_MASK_SHIFT 12
+
+HISI_PMU_EVENT_ATTR_EXTRACTOR(tgtid_cmd, config1, 10, 0);
+HISI_PMU_EVENT_ATTR_EXTRACTOR(tgtid_msk, config1, 21, 11);
+HISI_PMU_EVENT_ATTR_EXTRACTOR(srcid_cmd, config1, 32, 22);
+HISI_PMU_EVENT_ATTR_EXTRACTOR(srcid_msk, config1, 43, 33);
+HISI_PMU_EVENT_ATTR_EXTRACTOR(tracetag_en, config1, 44, 44);
+
+static void hisi_pa_pmu_enable_tracetag(struct perf_event *event)
+{
+ struct hisi_pmu *pa_pmu = to_hisi_pmu(event->pmu);
+ u32 tt_en = hisi_get_tracetag_en(event);
+
+ if (tt_en) {
+ u32 val;
+
+ val = readl(pa_pmu->base + PA_TT_CTRL);
+ val |= PA_TRACETAG_EN;
+ writel(val, pa_pmu->base + PA_TT_CTRL);
+ }
+}
+
+static void hisi_pa_pmu_clear_tracetag(struct perf_event *event)
+{
+ struct hisi_pmu *pa_pmu = to_hisi_pmu(event->pmu);
+ u32 tt_en = hisi_get_tracetag_en(event);
+
+ if (tt_en) {
+ u32 val;
+
+ val = readl(pa_pmu->base + PA_TT_CTRL);
+ val &= ~PA_TRACETAG_EN;
+ writel(val, pa_pmu->base + PA_TT_CTRL);
+ }
+}
+
+static void hisi_pa_pmu_config_tgtid(struct perf_event *event)
+{
+ struct hisi_pmu *pa_pmu = to_hisi_pmu(event->pmu);
+ u32 cmd = hisi_get_tgtid_cmd(event);
+
+ if (cmd) {
+ u32 msk = hisi_get_tgtid_msk(event);
+ u32 val = cmd | PA_TGTID_EN | (msk << PA_TGTID_MASK_SHIFT);
+
+ writel(val, pa_pmu->base + PA_TGTID_CTRL);
+ }
+}
+
+static void hisi_pa_pmu_clear_tgtid(struct perf_event *event)
+{
+ struct hisi_pmu *pa_pmu = to_hisi_pmu(event->pmu);
+ u32 cmd = hisi_get_tgtid_cmd(event);
+
+ if (cmd)
+ writel(PA_TGTID_NONE, pa_pmu->base + PA_TGTID_CTRL);
+}
+
+static void hisi_pa_pmu_config_srcid(struct perf_event *event)
+{
+ struct hisi_pmu *pa_pmu = to_hisi_pmu(event->pmu);
+ u32 cmd = hisi_get_srcid_cmd(event);
+
+ if (cmd) {
+ u32 msk = hisi_get_srcid_msk(event);
+ u32 val = cmd | PA_SRCID_EN | (msk << PA_SRCID_MASK_SHIFT);
+
+ writel(val, pa_pmu->base + PA_SRCID_CTRL);
+ }
+}
+
+static void hisi_pa_pmu_clear_srcid(struct perf_event *event)
+{
+ struct hisi_pmu *pa_pmu = to_hisi_pmu(event->pmu);
+ u32 cmd = hisi_get_srcid_cmd(event);
+
+ if (cmd)
+ writel(PA_SRCID_NONE, pa_pmu->base + PA_SRCID_CTRL);
+}
+
+static void hisi_pa_pmu_enable_filter(struct perf_event *event)
+{
+ if (event->attr.config1 != 0x0) {
+ hisi_pa_pmu_enable_tracetag(event);
+ hisi_pa_pmu_config_srcid(event);
+ hisi_pa_pmu_config_tgtid(event);
+ }
+}
+
+static void hisi_pa_pmu_disable_filter(struct perf_event *event)
+{
+ if (event->attr.config1 != 0x0) {
+ hisi_pa_pmu_clear_tgtid(event);
+ hisi_pa_pmu_clear_srcid(event);
+ hisi_pa_pmu_clear_tracetag(event);
+ }
+}
+
+static u32 hisi_pa_pmu_get_counter_offset(int idx)
+{
+ return (PA_EVENT_CNT0_L + idx * 8);
+}
+
+static u64 hisi_pa_pmu_read_counter(struct hisi_pmu *pa_pmu,
+ struct hw_perf_event *hwc)
+{
+ return readq(pa_pmu->base + hisi_pa_pmu_get_counter_offset(hwc->idx));
+}
+
+static void hisi_pa_pmu_write_counter(struct hisi_pmu *pa_pmu,
+ struct hw_perf_event *hwc, u64 val)
+{
+ writeq(val, pa_pmu->base + hisi_pa_pmu_get_counter_offset(hwc->idx));
+}
+
+static void hisi_pa_pmu_write_evtype(struct hisi_pmu *pa_pmu, int idx,
+ u32 type)
+{
+ u32 reg, reg_idx, shift, val;
+
+ /*
+ * Select the appropriate event select register(PA_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,
+ * PA_EVENT_TYPE0 is chosen. For the latter 4 hardware counters,
+ * PA_EVENT_TYPE1 is chosen.
+ */
+ reg = PA_EVENT_TYPE0 + (idx / 4) * 4;
+ reg_idx = idx % 4;
+ shift = 8 * reg_idx;
+
+ /* Write event code to pa_EVENT_TYPEx Register */
+ val = readl(pa_pmu->base + reg);
+ val &= ~(PA_EVTYPE_MASK << shift);
+ val |= (type << shift);
+ writel(val, pa_pmu->base + reg);
+}
+
+static void hisi_pa_pmu_start_counters(struct hisi_pmu *pa_pmu)
+{
+ u32 val;
+
+ val = readl(pa_pmu->base + PA_PERF_CTRL);
+ val |= PA_PERF_CTRL_EN;
+ writel(val, pa_pmu->base + PA_PERF_CTRL);
+}
+
+static void hisi_pa_pmu_stop_counters(struct hisi_pmu *pa_pmu)
+{
+ u32 val;
+
+ val = readl(pa_pmu->base + PA_PERF_CTRL);
+ val &= ~(PA_PERF_CTRL_EN);
+ writel(val, pa_pmu->base + PA_PERF_CTRL);
+}
+
+static void hisi_pa_pmu_enable_counter(struct hisi_pmu *pa_pmu,
+ struct hw_perf_event *hwc)
+{
+ u32 val;
+
+ /* Enable counter index in PA_EVENT_CTRL register */
+ val = readl(pa_pmu->base + PA_EVENT_CTRL);
+ val |= 1 << hwc->idx;
+ writel(val, pa_pmu->base + PA_EVENT_CTRL);
+}
+
+static void hisi_pa_pmu_disable_counter(struct hisi_pmu *pa_pmu,
+ struct hw_perf_event *hwc)
+{
+ u32 val;
+
+ /* Clear counter index in PA_EVENT_CTRL register */
+ val = readl(pa_pmu->base + PA_EVENT_CTRL);
+ val &= ~(1 << hwc->idx);
+ writel(val, pa_pmu->base + PA_EVENT_CTRL);
+}
+
+static void hisi_pa_pmu_enable_counter_int(struct hisi_pmu *pa_pmu,
+ struct hw_perf_event *hwc)
+{
+ u32 val;
+
+ /* Write 0 to enable interrupt */
+ val = readl(pa_pmu->base + PA_INT_MASK);
+ val &= ~(1 << hwc->idx);
+ writel(val, pa_pmu->base + PA_INT_MASK);
+}
+
+static void hisi_pa_pmu_disable_counter_int(struct hisi_pmu *pa_pmu,
+ struct hw_perf_event *hwc)
+{
+ u32 val;
+
+ /* Write 1 to mask interrupt */
+ val = readl(pa_pmu->base + PA_INT_MASK);
+ val |= 1 << hwc->idx;
+ writel(val, pa_pmu->base + PA_INT_MASK);
+}
+
+static u32 hisi_pa_pmu_get_int_status(struct hisi_pmu *pa_pmu)
+{
+ return readl(pa_pmu->base + PA_INT_STATUS);
+}
+
+static void hisi_pa_pmu_clear_int_status(struct hisi_pmu *pa_pmu, int idx)
+{
+ writel(1 << idx, pa_pmu->base + PA_INT_CLEAR);
+}
+
+static const struct acpi_device_id hisi_pa_pmu_acpi_match[] = {
+ { "HISI0273", },
+ {}
+};
+MODULE_DEVICE_TABLE(acpi, hisi_pa_pmu_acpi_match);
+
+static int hisi_pa_pmu_init_data(struct platform_device *pdev,
+ struct hisi_pmu *pa_pmu)
+{
+ /*
+ * Use the SCCL_ID and the index ID to identify the PA PMU,
+ * while SCCL_ID is the nearst SCCL_ID from this SICL and
+ * CPU core is chosen from this SCCL to manage this PMU.
+ */
+ if (device_property_read_u32(&pdev->dev, "hisilicon,scl-id",
+ &pa_pmu->sccl_id)) {
+ dev_err(&pdev->dev, "Cannot read sccl-id!\n");
+ return -EINVAL;
+ }
+
+ if (device_property_read_u32(&pdev->dev, "hisilicon,idx-id",
+ &pa_pmu->index_id)) {
+ dev_err(&pdev->dev, "Cannot read idx-id!\n");
+ return -EINVAL;
+ }
+
+ pa_pmu->ccl_id = -1;
+
+ pa_pmu->base = devm_platform_ioremap_resource(pdev, 0);
+ if (IS_ERR(pa_pmu->base)) {
+ dev_err(&pdev->dev, "ioremap failed for pa_pmu resource.\n");
+ return PTR_ERR(pa_pmu->base);
+ }
+
+ pa_pmu->identifier = readl(pa_pmu->base + PA_PMU_VERSION);
+
+ return 0;
+}
+
+static struct attribute *hisi_pa_pmu_v2_format_attr[] = {
+ HISI_PMU_FORMAT_ATTR(event, "config:0-7"),
+ HISI_PMU_FORMAT_ATTR(tgtid_cmd, "config1:0-10"),
+ HISI_PMU_FORMAT_ATTR(tgtid_msk, "config1:11-21"),
+ HISI_PMU_FORMAT_ATTR(srcid_cmd, "config1:22-32"),
+ HISI_PMU_FORMAT_ATTR(srcid_msk, "config1:33-43"),
+ HISI_PMU_FORMAT_ATTR(tracetag_en, "config1:44"),
+ NULL,
+};
+
+static const struct attribute_group hisi_pa_pmu_v2_format_group = {
+ .name = "format",
+ .attrs = hisi_pa_pmu_v2_format_attr,
+};
+
+static struct attribute *hisi_pa_pmu_v2_events_attr[] = {
+ HISI_PMU_EVENT_ATTR(rx_req, 0x40),
+ HISI_PMU_EVENT_ATTR(tx_req, 0x5c),
+ HISI_PMU_EVENT_ATTR(cycle, 0x78),
+ NULL
+};
+
+static const struct attribute_group hisi_pa_pmu_v2_events_group = {
+ .name = "events",
+ .attrs = hisi_pa_pmu_v2_events_attr,
+};
+
+static DEVICE_ATTR(cpumask, 0444, hisi_cpumask_sysfs_show, NULL);
+
+static struct attribute *hisi_pa_pmu_cpumask_attrs[] = {
+ &dev_attr_cpumask.attr,
+ NULL
+};
+
+static const struct attribute_group hisi_pa_pmu_cpumask_attr_group = {
+ .attrs = hisi_pa_pmu_cpumask_attrs,
+};
+
+static struct device_attribute hisi_pa_pmu_identifier_attr =
+ __ATTR(identifier, 0444, hisi_uncore_pmu_identifier_attr_show, NULL);
+
+static struct attribute *hisi_pa_pmu_identifier_attrs[] = {
+ &hisi_pa_pmu_identifier_attr.attr,
+ NULL
+};
+
+static struct attribute_group hisi_pa_pmu_identifier_group = {
+ .attrs = hisi_pa_pmu_identifier_attrs,
+};
+
+static const struct attribute_group *hisi_pa_pmu_v2_attr_groups[] = {
+ &hisi_pa_pmu_v2_format_group,
+ &hisi_pa_pmu_v2_events_group,
+ &hisi_pa_pmu_cpumask_attr_group,
+ &hisi_pa_pmu_identifier_group,
+ NULL
+};
+
+static const struct hisi_uncore_ops hisi_uncore_pa_ops = {
+ .write_evtype = hisi_pa_pmu_write_evtype,
+ .get_event_idx = hisi_uncore_pmu_get_event_idx,
+ .start_counters = hisi_pa_pmu_start_counters,
+ .stop_counters = hisi_pa_pmu_stop_counters,
+ .enable_counter = hisi_pa_pmu_enable_counter,
+ .disable_counter = hisi_pa_pmu_disable_counter,
+ .enable_counter_int = hisi_pa_pmu_enable_counter_int,
+ .disable_counter_int = hisi_pa_pmu_disable_counter_int,
+ .write_counter = hisi_pa_pmu_write_counter,
+ .read_counter = hisi_pa_pmu_read_counter,
+ .get_int_status = hisi_pa_pmu_get_int_status,
+ .clear_int_status = hisi_pa_pmu_clear_int_status,
+ .enable_filter = hisi_pa_pmu_enable_filter,
+ .disable_filter = hisi_pa_pmu_disable_filter,
+};
+
+static int hisi_pa_pmu_dev_probe(struct platform_device *pdev,
+ struct hisi_pmu *pa_pmu)
+{
+ int ret;
+
+ ret = hisi_pa_pmu_init_data(pdev, pa_pmu);
+ if (ret)
+ return ret;
+
+ ret = hisi_uncore_pmu_init_irq(pa_pmu, pdev);
+ if (ret)
+ return ret;
+
+ pa_pmu->pmu_events.attr_groups = hisi_pa_pmu_v2_attr_groups;
+ pa_pmu->num_counters = PA_NR_COUNTERS;
+ pa_pmu->ops = &hisi_uncore_pa_ops;
+ pa_pmu->check_event = 0xB0;
+ pa_pmu->counter_bits = 64;
+ pa_pmu->dev = &pdev->dev;
+ pa_pmu->on_cpu = -1;
+
+ return 0;
+}
+
+static int hisi_pa_pmu_probe(struct platform_device *pdev)
+{
+ struct hisi_pmu *pa_pmu;
+ char *name;
+ int ret;
+
+ pa_pmu = devm_kzalloc(&pdev->dev, sizeof(*pa_pmu), GFP_KERNEL);
+ if (!pa_pmu)
+ return -ENOMEM;
+
+ ret = hisi_pa_pmu_dev_probe(pdev, pa_pmu);
+ if (ret)
+ return ret;
+ /*
+ * PA is attached in SICL and the CPU core is chosen to manage this
+ * PMU which is the nearest SCCL, while its SCCL_ID is greater than
+ * one with the SICL_ID.
+ */
+ name = devm_kasprintf(&pdev->dev, GFP_KERNEL, "hisi_sicl%u_pa%u",
+ pa_pmu->sccl_id - 1, pa_pmu->index_id);
+ if (!name)
+ return -ENOMEM;
+
+ ret = cpuhp_state_add_instance(CPUHP_AP_PERF_ARM_HISI_PA_ONLINE,
+ &pa_pmu->node);
+ if (ret) {
+ dev_err(&pdev->dev, "Error %d registering hotplug\n", ret);
+ return ret;
+ }
+
+ pa_pmu->pmu = (struct pmu) {
+ .module = THIS_MODULE,
+ .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 = pa_pmu->pmu_events.attr_groups,
+ .capabilities = PERF_PMU_CAP_NO_EXCLUDE,
+ };
+
+ ret = perf_pmu_register(&pa_pmu->pmu, name, -1);
+ if (ret) {
+ dev_err(pa_pmu->dev, "PMU register failed, ret = %d\n", ret);
+ cpuhp_state_remove_instance(CPUHP_AP_PERF_ARM_HISI_PA_ONLINE,
+ &pa_pmu->node);
+ irq_set_affinity_hint(pa_pmu->irq, NULL);
+ return ret;
+ }
+
+ platform_set_drvdata(pdev, pa_pmu);
+ return ret;
+}
+
+static int hisi_pa_pmu_remove(struct platform_device *pdev)
+{
+ struct hisi_pmu *pa_pmu = platform_get_drvdata(pdev);
+
+ perf_pmu_unregister(&pa_pmu->pmu);
+ cpuhp_state_remove_instance_nocalls(CPUHP_AP_PERF_ARM_HISI_PA_ONLINE,
+ &pa_pmu->node);
+ irq_set_affinity_hint(pa_pmu->irq, NULL);
+
+ return 0;
+}
+
+static struct platform_driver hisi_pa_pmu_driver = {
+ .driver = {
+ .name = "hisi_pa_pmu",
+ .acpi_match_table = hisi_pa_pmu_acpi_match,
+ .suppress_bind_attrs = true,
+ },
+ .probe = hisi_pa_pmu_probe,
+ .remove = hisi_pa_pmu_remove,
+};
+
+static int __init hisi_pa_pmu_module_init(void)
+{
+ int ret;
+
+ ret = cpuhp_setup_state_multi(CPUHP_AP_PERF_ARM_HISI_PA_ONLINE,
+ "AP_PERF_ARM_HISI_PA_ONLINE",
+ hisi_uncore_pmu_online_cpu,
+ hisi_uncore_pmu_offline_cpu);
+ if (ret) {
+ pr_err("PA PMU: cpuhp state setup failed, ret = %d\n", ret);
+ return ret;
+ }
+
+ ret = platform_driver_register(&hisi_pa_pmu_driver);
+ if (ret)
+ cpuhp_remove_multi_state(CPUHP_AP_PERF_ARM_HISI_PA_ONLINE);
+
+ return ret;
+}
+module_init(hisi_pa_pmu_module_init);
+
+static void __exit hisi_pa_pmu_module_exit(void)
+{
+ platform_driver_unregister(&hisi_pa_pmu_driver);
+ cpuhp_remove_multi_state(CPUHP_AP_PERF_ARM_HISI_PA_ONLINE);
+}
+module_exit(hisi_pa_pmu_module_exit);
+
+MODULE_DESCRIPTION("HiSilicon Protocol Adapter uncore PMU driver");
+MODULE_LICENSE("GPL v2");
+MODULE_AUTHOR("Shaokun Zhang <zhangshaokun@hisilicon.com>");
+MODULE_AUTHOR("Qi Liu <liuqi115@huawei.com>");
@@ -174,6 +174,7 @@ enum cpuhp_state {
CPUHP_AP_PERF_ARM_HISI_DDRC_ONLINE,
CPUHP_AP_PERF_ARM_HISI_HHA_ONLINE,
CPUHP_AP_PERF_ARM_HISI_L3_ONLINE,
+ CPUHP_AP_PERF_ARM_HISI_PA_ONLINE,
CPUHP_AP_PERF_ARM_HISI_SLLC_ONLINE,
CPUHP_AP_PERF_ARM_L2X0_ONLINE,
CPUHP_AP_PERF_ARM_QCOM_L2_ONLINE,