drivers/perf: Add Cavium ThunderX2 SoC UNCORE PMU driver
This patch adds a perf driver for the PMU UNCORE devices DDR4 Memory Controller(DMC) and Level 3 Cache(L3C). Each PMU supports up to 4 counters. All counters lack overflow interrupt and are sampled periodically. Reviewed-by: Suzuki K Poulose <suzuki.poulose@arm.com> Signed-off-by: Ganapatrao Kulkarni <ganapatrao.kulkarni@cavium.com> [will: consistent enum cpuhp_state naming] Signed-off-by: Will Deacon <will.deacon@arm.com>
This commit is contained in:
Kulkarni, Ganapatrao
Will Deacon
parent
d6310a3f33
commit
69c32972d5
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@ -87,6 +87,15 @@ config QCOM_L3_PMU
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Adds the L3 cache PMU into the perf events subsystem for
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monitoring L3 cache events.
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config THUNDERX2_PMU
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tristate "Cavium ThunderX2 SoC PMU UNCORE"
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depends on ARCH_THUNDER2 && ARM64 && ACPI && NUMA
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default m
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help
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Provides support for ThunderX2 UNCORE events.
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The SoC has PMU support in its L3 cache controller (L3C) and
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in the DDR4 Memory Controller (DMC).
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config XGENE_PMU
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depends on ARCH_XGENE
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bool "APM X-Gene SoC PMU"
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@ -7,5 +7,6 @@ obj-$(CONFIG_ARM_PMU_ACPI) += arm_pmu_acpi.o
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obj-$(CONFIG_HISI_PMU) += hisilicon/
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obj-$(CONFIG_QCOM_L2_PMU) += qcom_l2_pmu.o
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obj-$(CONFIG_QCOM_L3_PMU) += qcom_l3_pmu.o
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obj-$(CONFIG_THUNDERX2_PMU) += thunderx2_pmu.o
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obj-$(CONFIG_XGENE_PMU) += xgene_pmu.o
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obj-$(CONFIG_ARM_SPE_PMU) += arm_spe_pmu.o
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@ -0,0 +1,861 @@
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// SPDX-License-Identifier: GPL-2.0
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/*
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* CAVIUM THUNDERX2 SoC PMU UNCORE
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* Copyright (C) 2018 Cavium Inc.
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* Author: Ganapatrao Kulkarni <gkulkarni@cavium.com>
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*/
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#include <linux/acpi.h>
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#include <linux/cpuhotplug.h>
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#include <linux/perf_event.h>
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#include <linux/platform_device.h>
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/* Each ThunderX2(TX2) Socket has a L3C and DMC UNCORE PMU device.
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* Each UNCORE PMU device consists of 4 independent programmable counters.
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* Counters are 32 bit and do not support overflow interrupt,
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* they need to be sampled before overflow(i.e, at every 2 seconds).
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*/
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#define TX2_PMU_MAX_COUNTERS 4
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#define TX2_PMU_DMC_CHANNELS 8
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#define TX2_PMU_L3_TILES 16
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#define TX2_PMU_HRTIMER_INTERVAL (2 * NSEC_PER_SEC)
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#define GET_EVENTID(ev) ((ev->hw.config) & 0x1f)
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#define GET_COUNTERID(ev) ((ev->hw.idx) & 0x3)
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/* 1 byte per counter(4 counters).
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* Event id is encoded in bits [5:1] of a byte,
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*/
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#define DMC_EVENT_CFG(idx, val) ((val) << (((idx) * 8) + 1))
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#define L3C_COUNTER_CTL 0xA8
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#define L3C_COUNTER_DATA 0xAC
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#define DMC_COUNTER_CTL 0x234
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#define DMC_COUNTER_DATA 0x240
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/* L3C event IDs */
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#define L3_EVENT_READ_REQ 0xD
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#define L3_EVENT_WRITEBACK_REQ 0xE
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#define L3_EVENT_INV_N_WRITE_REQ 0xF
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#define L3_EVENT_INV_REQ 0x10
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#define L3_EVENT_EVICT_REQ 0x13
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#define L3_EVENT_INV_N_WRITE_HIT 0x14
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#define L3_EVENT_INV_HIT 0x15
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#define L3_EVENT_READ_HIT 0x17
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#define L3_EVENT_MAX 0x18
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/* DMC event IDs */
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#define DMC_EVENT_COUNT_CYCLES 0x1
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#define DMC_EVENT_WRITE_TXNS 0xB
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#define DMC_EVENT_DATA_TRANSFERS 0xD
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#define DMC_EVENT_READ_TXNS 0xF
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#define DMC_EVENT_MAX 0x10
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enum tx2_uncore_type {
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PMU_TYPE_L3C,
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PMU_TYPE_DMC,
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PMU_TYPE_INVALID,
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};
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/*
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* pmu on each socket has 2 uncore devices(dmc and l3c),
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* each device has 4 counters.
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*/
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struct tx2_uncore_pmu {
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struct hlist_node hpnode;
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struct list_head entry;
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struct pmu pmu;
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char *name;
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int node;
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int cpu;
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u32 max_counters;
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u32 prorate_factor;
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u32 max_events;
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u64 hrtimer_interval;
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void __iomem *base;
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DECLARE_BITMAP(active_counters, TX2_PMU_MAX_COUNTERS);
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struct perf_event *events[TX2_PMU_MAX_COUNTERS];
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struct device *dev;
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struct hrtimer hrtimer;
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const struct attribute_group **attr_groups;
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enum tx2_uncore_type type;
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void (*init_cntr_base)(struct perf_event *event,
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struct tx2_uncore_pmu *tx2_pmu);
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void (*stop_event)(struct perf_event *event);
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void (*start_event)(struct perf_event *event, int flags);
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};
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static LIST_HEAD(tx2_pmus);
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static inline struct tx2_uncore_pmu *pmu_to_tx2_pmu(struct pmu *pmu)
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{
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return container_of(pmu, struct tx2_uncore_pmu, pmu);
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}
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PMU_FORMAT_ATTR(event, "config:0-4");
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static struct attribute *l3c_pmu_format_attrs[] = {
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&format_attr_event.attr,
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NULL,
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};
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static struct attribute *dmc_pmu_format_attrs[] = {
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&format_attr_event.attr,
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NULL,
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};
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static const struct attribute_group l3c_pmu_format_attr_group = {
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.name = "format",
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.attrs = l3c_pmu_format_attrs,
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};
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static const struct attribute_group dmc_pmu_format_attr_group = {
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.name = "format",
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.attrs = dmc_pmu_format_attrs,
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};
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/*
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* sysfs event attributes
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*/
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static ssize_t tx2_pmu_event_show(struct device *dev,
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struct device_attribute *attr, char *buf)
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{
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struct dev_ext_attribute *eattr;
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eattr = container_of(attr, struct dev_ext_attribute, attr);
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return sprintf(buf, "event=0x%lx\n", (unsigned long) eattr->var);
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}
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#define TX2_EVENT_ATTR(name, config) \
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PMU_EVENT_ATTR(name, tx2_pmu_event_attr_##name, \
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config, tx2_pmu_event_show)
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TX2_EVENT_ATTR(read_request, L3_EVENT_READ_REQ);
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TX2_EVENT_ATTR(writeback_request, L3_EVENT_WRITEBACK_REQ);
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TX2_EVENT_ATTR(inv_nwrite_request, L3_EVENT_INV_N_WRITE_REQ);
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TX2_EVENT_ATTR(inv_request, L3_EVENT_INV_REQ);
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TX2_EVENT_ATTR(evict_request, L3_EVENT_EVICT_REQ);
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TX2_EVENT_ATTR(inv_nwrite_hit, L3_EVENT_INV_N_WRITE_HIT);
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TX2_EVENT_ATTR(inv_hit, L3_EVENT_INV_HIT);
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TX2_EVENT_ATTR(read_hit, L3_EVENT_READ_HIT);
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static struct attribute *l3c_pmu_events_attrs[] = {
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&tx2_pmu_event_attr_read_request.attr.attr,
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&tx2_pmu_event_attr_writeback_request.attr.attr,
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&tx2_pmu_event_attr_inv_nwrite_request.attr.attr,
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&tx2_pmu_event_attr_inv_request.attr.attr,
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&tx2_pmu_event_attr_evict_request.attr.attr,
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&tx2_pmu_event_attr_inv_nwrite_hit.attr.attr,
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&tx2_pmu_event_attr_inv_hit.attr.attr,
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&tx2_pmu_event_attr_read_hit.attr.attr,
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NULL,
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};
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TX2_EVENT_ATTR(cnt_cycles, DMC_EVENT_COUNT_CYCLES);
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TX2_EVENT_ATTR(write_txns, DMC_EVENT_WRITE_TXNS);
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TX2_EVENT_ATTR(data_transfers, DMC_EVENT_DATA_TRANSFERS);
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TX2_EVENT_ATTR(read_txns, DMC_EVENT_READ_TXNS);
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static struct attribute *dmc_pmu_events_attrs[] = {
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&tx2_pmu_event_attr_cnt_cycles.attr.attr,
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&tx2_pmu_event_attr_write_txns.attr.attr,
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&tx2_pmu_event_attr_data_transfers.attr.attr,
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&tx2_pmu_event_attr_read_txns.attr.attr,
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NULL,
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};
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static const struct attribute_group l3c_pmu_events_attr_group = {
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.name = "events",
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.attrs = l3c_pmu_events_attrs,
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};
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static const struct attribute_group dmc_pmu_events_attr_group = {
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.name = "events",
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.attrs = dmc_pmu_events_attrs,
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};
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/*
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* sysfs cpumask attributes
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*/
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static ssize_t cpumask_show(struct device *dev, struct device_attribute *attr,
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char *buf)
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{
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struct tx2_uncore_pmu *tx2_pmu;
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tx2_pmu = pmu_to_tx2_pmu(dev_get_drvdata(dev));
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return cpumap_print_to_pagebuf(true, buf, cpumask_of(tx2_pmu->cpu));
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}
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static DEVICE_ATTR_RO(cpumask);
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static struct attribute *tx2_pmu_cpumask_attrs[] = {
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&dev_attr_cpumask.attr,
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NULL,
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};
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static const struct attribute_group pmu_cpumask_attr_group = {
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.attrs = tx2_pmu_cpumask_attrs,
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};
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/*
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* Per PMU device attribute groups
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*/
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static const struct attribute_group *l3c_pmu_attr_groups[] = {
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&l3c_pmu_format_attr_group,
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&pmu_cpumask_attr_group,
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&l3c_pmu_events_attr_group,
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NULL
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};
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static const struct attribute_group *dmc_pmu_attr_groups[] = {
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&dmc_pmu_format_attr_group,
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&pmu_cpumask_attr_group,
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&dmc_pmu_events_attr_group,
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NULL
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};
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static inline u32 reg_readl(unsigned long addr)
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{
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return readl((void __iomem *)addr);
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}
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static inline void reg_writel(u32 val, unsigned long addr)
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{
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writel(val, (void __iomem *)addr);
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}
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static int alloc_counter(struct tx2_uncore_pmu *tx2_pmu)
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{
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int counter;
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counter = find_first_zero_bit(tx2_pmu->active_counters,
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tx2_pmu->max_counters);
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if (counter == tx2_pmu->max_counters)
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return -ENOSPC;
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set_bit(counter, tx2_pmu->active_counters);
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return counter;
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}
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static inline void free_counter(struct tx2_uncore_pmu *tx2_pmu, int counter)
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{
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clear_bit(counter, tx2_pmu->active_counters);
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}
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static void init_cntr_base_l3c(struct perf_event *event,
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struct tx2_uncore_pmu *tx2_pmu)
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{
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struct hw_perf_event *hwc = &event->hw;
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/* counter ctrl/data reg offset at 8 */
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hwc->config_base = (unsigned long)tx2_pmu->base
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+ L3C_COUNTER_CTL + (8 * GET_COUNTERID(event));
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hwc->event_base = (unsigned long)tx2_pmu->base
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+ L3C_COUNTER_DATA + (8 * GET_COUNTERID(event));
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}
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static void init_cntr_base_dmc(struct perf_event *event,
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struct tx2_uncore_pmu *tx2_pmu)
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{
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struct hw_perf_event *hwc = &event->hw;
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hwc->config_base = (unsigned long)tx2_pmu->base
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+ DMC_COUNTER_CTL;
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/* counter data reg offset at 0xc */
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hwc->event_base = (unsigned long)tx2_pmu->base
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+ DMC_COUNTER_DATA + (0xc * GET_COUNTERID(event));
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}
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static void uncore_start_event_l3c(struct perf_event *event, int flags)
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{
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u32 val;
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struct hw_perf_event *hwc = &event->hw;
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/* event id encoded in bits [07:03] */
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val = GET_EVENTID(event) << 3;
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reg_writel(val, hwc->config_base);
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local64_set(&hwc->prev_count, 0);
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reg_writel(0, hwc->event_base);
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}
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static inline void uncore_stop_event_l3c(struct perf_event *event)
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{
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reg_writel(0, event->hw.config_base);
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}
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static void uncore_start_event_dmc(struct perf_event *event, int flags)
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{
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u32 val;
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struct hw_perf_event *hwc = &event->hw;
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int idx = GET_COUNTERID(event);
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int event_id = GET_EVENTID(event);
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/* enable and start counters.
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* 8 bits for each counter, bits[05:01] of a counter to set event type.
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*/
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val = reg_readl(hwc->config_base);
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val &= ~DMC_EVENT_CFG(idx, 0x1f);
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val |= DMC_EVENT_CFG(idx, event_id);
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reg_writel(val, hwc->config_base);
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local64_set(&hwc->prev_count, 0);
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reg_writel(0, hwc->event_base);
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}
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static void uncore_stop_event_dmc(struct perf_event *event)
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{
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u32 val;
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struct hw_perf_event *hwc = &event->hw;
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int idx = GET_COUNTERID(event);
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/* clear event type(bits[05:01]) to stop counter */
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val = reg_readl(hwc->config_base);
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val &= ~DMC_EVENT_CFG(idx, 0x1f);
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reg_writel(val, hwc->config_base);
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}
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static void tx2_uncore_event_update(struct perf_event *event)
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{
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s64 prev, delta, new = 0;
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struct hw_perf_event *hwc = &event->hw;
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struct tx2_uncore_pmu *tx2_pmu;
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enum tx2_uncore_type type;
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u32 prorate_factor;
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tx2_pmu = pmu_to_tx2_pmu(event->pmu);
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type = tx2_pmu->type;
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prorate_factor = tx2_pmu->prorate_factor;
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new = reg_readl(hwc->event_base);
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prev = local64_xchg(&hwc->prev_count, new);
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/* handles rollover of 32 bit counter */
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delta = (u32)(((1UL << 32) - prev) + new);
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/* DMC event data_transfers granularity is 16 Bytes, convert it to 64 */
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if (type == PMU_TYPE_DMC &&
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GET_EVENTID(event) == DMC_EVENT_DATA_TRANSFERS)
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delta = delta/4;
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/* L3C and DMC has 16 and 8 interleave channels respectively.
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* The sampled value is for channel 0 and multiplied with
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* prorate_factor to get the count for a device.
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*/
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local64_add(delta * prorate_factor, &event->count);
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}
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static enum tx2_uncore_type get_tx2_pmu_type(struct acpi_device *adev)
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{
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int i = 0;
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struct acpi_tx2_pmu_device {
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__u8 id[ACPI_ID_LEN];
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enum tx2_uncore_type type;
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} devices[] = {
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{"CAV901D", PMU_TYPE_L3C},
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{"CAV901F", PMU_TYPE_DMC},
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{"", PMU_TYPE_INVALID}
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};
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while (devices[i].type != PMU_TYPE_INVALID) {
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if (!strcmp(acpi_device_hid(adev), devices[i].id))
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break;
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i++;
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}
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return devices[i].type;
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}
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static bool tx2_uncore_validate_event(struct pmu *pmu,
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struct perf_event *event, int *counters)
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{
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if (is_software_event(event))
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return true;
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/* Reject groups spanning multiple HW PMUs. */
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if (event->pmu != pmu)
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return false;
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*counters = *counters + 1;
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return true;
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}
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/*
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* Make sure the group of events can be scheduled at once
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* on the PMU.
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*/
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static bool tx2_uncore_validate_event_group(struct perf_event *event)
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{
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struct perf_event *sibling, *leader = event->group_leader;
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int counters = 0;
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if (event->group_leader == event)
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return true;
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if (!tx2_uncore_validate_event(event->pmu, leader, &counters))
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return false;
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for_each_sibling_event(sibling, leader) {
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if (!tx2_uncore_validate_event(event->pmu, sibling, &counters))
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return false;
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}
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if (!tx2_uncore_validate_event(event->pmu, event, &counters))
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return false;
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/*
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* If the group requires more counters than the HW has,
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* it cannot ever be scheduled.
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*/
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return counters <= TX2_PMU_MAX_COUNTERS;
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||||
}
|
||||
|
||||
|
||||
static int tx2_uncore_event_init(struct perf_event *event)
|
||||
{
|
||||
struct hw_perf_event *hwc = &event->hw;
|
||||
struct tx2_uncore_pmu *tx2_pmu;
|
||||
|
||||
/* Test the event attr type check for PMU enumeration */
|
||||
if (event->attr.type != event->pmu->type)
|
||||
return -ENOENT;
|
||||
|
||||
/*
|
||||
* SOC PMU counters are shared across all cores.
|
||||
* Therefore, it does not support per-process mode.
|
||||
* Also, it does not support event sampling mode.
|
||||
*/
|
||||
if (is_sampling_event(event) || event->attach_state & PERF_ATTACH_TASK)
|
||||
return -EINVAL;
|
||||
|
||||
/* 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;
|
||||
|
||||
if (event->cpu < 0)
|
||||
return -EINVAL;
|
||||
|
||||
tx2_pmu = pmu_to_tx2_pmu(event->pmu);
|
||||
if (tx2_pmu->cpu >= nr_cpu_ids)
|
||||
return -EINVAL;
|
||||
event->cpu = tx2_pmu->cpu;
|
||||
|
||||
if (event->attr.config >= tx2_pmu->max_events)
|
||||
return -EINVAL;
|
||||
|
||||
/* store event id */
|
||||
hwc->config = event->attr.config;
|
||||
|
||||
/* Validate the group */
|
||||
if (!tx2_uncore_validate_event_group(event))
|
||||
return -EINVAL;
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static void tx2_uncore_event_start(struct perf_event *event, int flags)
|
||||
{
|
||||
struct hw_perf_event *hwc = &event->hw;
|
||||
struct tx2_uncore_pmu *tx2_pmu;
|
||||
|
||||
hwc->state = 0;
|
||||
tx2_pmu = pmu_to_tx2_pmu(event->pmu);
|
||||
|
||||
tx2_pmu->start_event(event, flags);
|
||||
perf_event_update_userpage(event);
|
||||
|
||||
/* Start timer for first event */
|
||||
if (bitmap_weight(tx2_pmu->active_counters,
|
||||
tx2_pmu->max_counters) == 1) {
|
||||
hrtimer_start(&tx2_pmu->hrtimer,
|
||||
ns_to_ktime(tx2_pmu->hrtimer_interval),
|
||||
HRTIMER_MODE_REL_PINNED);
|
||||
}
|
||||
}
|
||||
|
||||
static void tx2_uncore_event_stop(struct perf_event *event, int flags)
|
||||
{
|
||||
struct hw_perf_event *hwc = &event->hw;
|
||||
struct tx2_uncore_pmu *tx2_pmu;
|
||||
|
||||
if (hwc->state & PERF_HES_UPTODATE)
|
||||
return;
|
||||
|
||||
tx2_pmu = pmu_to_tx2_pmu(event->pmu);
|
||||
tx2_pmu->stop_event(event);
|
||||
WARN_ON_ONCE(hwc->state & PERF_HES_STOPPED);
|
||||
hwc->state |= PERF_HES_STOPPED;
|
||||
if (flags & PERF_EF_UPDATE) {
|
||||
tx2_uncore_event_update(event);
|
||||
hwc->state |= PERF_HES_UPTODATE;
|
||||
}
|
||||
}
|
||||
|
||||
static int tx2_uncore_event_add(struct perf_event *event, int flags)
|
||||
{
|
||||
struct hw_perf_event *hwc = &event->hw;
|
||||
struct tx2_uncore_pmu *tx2_pmu;
|
||||
|
||||
tx2_pmu = pmu_to_tx2_pmu(event->pmu);
|
||||
|
||||
/* Allocate a free counter */
|
||||
hwc->idx = alloc_counter(tx2_pmu);
|
||||
if (hwc->idx < 0)
|
||||
return -EAGAIN;
|
||||
|
||||
tx2_pmu->events[hwc->idx] = event;
|
||||
/* set counter control and data registers base address */
|
||||
tx2_pmu->init_cntr_base(event, tx2_pmu);
|
||||
|
||||
hwc->state = PERF_HES_UPTODATE | PERF_HES_STOPPED;
|
||||
if (flags & PERF_EF_START)
|
||||
tx2_uncore_event_start(event, flags);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static void tx2_uncore_event_del(struct perf_event *event, int flags)
|
||||
{
|
||||
struct tx2_uncore_pmu *tx2_pmu = pmu_to_tx2_pmu(event->pmu);
|
||||
struct hw_perf_event *hwc = &event->hw;
|
||||
|
||||
tx2_uncore_event_stop(event, PERF_EF_UPDATE);
|
||||
|
||||
/* clear the assigned counter */
|
||||
free_counter(tx2_pmu, GET_COUNTERID(event));
|
||||
|
||||
perf_event_update_userpage(event);
|
||||
tx2_pmu->events[hwc->idx] = NULL;
|
||||
hwc->idx = -1;
|
||||
}
|
||||
|
||||
static void tx2_uncore_event_read(struct perf_event *event)
|
||||
{
|
||||
tx2_uncore_event_update(event);
|
||||
}
|
||||
|
||||
static enum hrtimer_restart tx2_hrtimer_callback(struct hrtimer *timer)
|
||||
{
|
||||
struct tx2_uncore_pmu *tx2_pmu;
|
||||
int max_counters, idx;
|
||||
|
||||
tx2_pmu = container_of(timer, struct tx2_uncore_pmu, hrtimer);
|
||||
max_counters = tx2_pmu->max_counters;
|
||||
|
||||
if (bitmap_empty(tx2_pmu->active_counters, max_counters))
|
||||
return HRTIMER_NORESTART;
|
||||
|
||||
for_each_set_bit(idx, tx2_pmu->active_counters, max_counters) {
|
||||
struct perf_event *event = tx2_pmu->events[idx];
|
||||
|
||||
tx2_uncore_event_update(event);
|
||||
}
|
||||
hrtimer_forward_now(timer, ns_to_ktime(tx2_pmu->hrtimer_interval));
|
||||
return HRTIMER_RESTART;
|
||||
}
|
||||
|
||||
static int tx2_uncore_pmu_register(
|
||||
struct tx2_uncore_pmu *tx2_pmu)
|
||||
{
|
||||
struct device *dev = tx2_pmu->dev;
|
||||
char *name = tx2_pmu->name;
|
||||
|
||||
/* Perf event registration */
|
||||
tx2_pmu->pmu = (struct pmu) {
|
||||
.module = THIS_MODULE,
|
||||
.attr_groups = tx2_pmu->attr_groups,
|
||||
.task_ctx_nr = perf_invalid_context,
|
||||
.event_init = tx2_uncore_event_init,
|
||||
.add = tx2_uncore_event_add,
|
||||
.del = tx2_uncore_event_del,
|
||||
.start = tx2_uncore_event_start,
|
||||
.stop = tx2_uncore_event_stop,
|
||||
.read = tx2_uncore_event_read,
|
||||
};
|
||||
|
||||
tx2_pmu->pmu.name = devm_kasprintf(dev, GFP_KERNEL,
|
||||
"%s", name);
|
||||
|
||||
return perf_pmu_register(&tx2_pmu->pmu, tx2_pmu->pmu.name, -1);
|
||||
}
|
||||
|
||||
static int tx2_uncore_pmu_add_dev(struct tx2_uncore_pmu *tx2_pmu)
|
||||
{
|
||||
int ret, cpu;
|
||||
|
||||
cpu = cpumask_any_and(cpumask_of_node(tx2_pmu->node),
|
||||
cpu_online_mask);
|
||||
|
||||
tx2_pmu->cpu = cpu;
|
||||
hrtimer_init(&tx2_pmu->hrtimer, CLOCK_MONOTONIC, HRTIMER_MODE_REL);
|
||||
tx2_pmu->hrtimer.function = tx2_hrtimer_callback;
|
||||
|
||||
ret = tx2_uncore_pmu_register(tx2_pmu);
|
||||
if (ret) {
|
||||
dev_err(tx2_pmu->dev, "%s PMU: Failed to init driver\n",
|
||||
tx2_pmu->name);
|
||||
return -ENODEV;
|
||||
}
|
||||
|
||||
/* register hotplug callback for the pmu */
|
||||
ret = cpuhp_state_add_instance(
|
||||
CPUHP_AP_PERF_ARM_CAVIUM_TX2_UNCORE_ONLINE,
|
||||
&tx2_pmu->hpnode);
|
||||
if (ret) {
|
||||
dev_err(tx2_pmu->dev, "Error %d registering hotplug", ret);
|
||||
return ret;
|
||||
}
|
||||
|
||||
/* Add to list */
|
||||
list_add(&tx2_pmu->entry, &tx2_pmus);
|
||||
|
||||
dev_dbg(tx2_pmu->dev, "%s PMU UNCORE registered\n",
|
||||
tx2_pmu->pmu.name);
|
||||
return ret;
|
||||
}
|
||||
|
||||
static struct tx2_uncore_pmu *tx2_uncore_pmu_init_dev(struct device *dev,
|
||||
acpi_handle handle, struct acpi_device *adev, u32 type)
|
||||
{
|
||||
struct tx2_uncore_pmu *tx2_pmu;
|
||||
void __iomem *base;
|
||||
struct resource res;
|
||||
struct resource_entry *rentry;
|
||||
struct list_head list;
|
||||
int ret;
|
||||
|
||||
INIT_LIST_HEAD(&list);
|
||||
ret = acpi_dev_get_resources(adev, &list, NULL, NULL);
|
||||
if (ret <= 0) {
|
||||
dev_err(dev, "failed to parse _CRS method, error %d\n", ret);
|
||||
return NULL;
|
||||
}
|
||||
|
||||
list_for_each_entry(rentry, &list, node) {
|
||||
if (resource_type(rentry->res) == IORESOURCE_MEM) {
|
||||
res = *rentry->res;
|
||||
break;
|
||||
}
|
||||
}
|
||||
|
||||
if (!rentry->res)
|
||||
return NULL;
|
||||
|
||||
acpi_dev_free_resource_list(&list);
|
||||
base = devm_ioremap_resource(dev, &res);
|
||||
if (IS_ERR(base)) {
|
||||
dev_err(dev, "PMU type %d: Fail to map resource\n", type);
|
||||
return NULL;
|
||||
}
|
||||
|
||||
tx2_pmu = devm_kzalloc(dev, sizeof(*tx2_pmu), GFP_KERNEL);
|
||||
if (!tx2_pmu)
|
||||
return NULL;
|
||||
|
||||
tx2_pmu->dev = dev;
|
||||
tx2_pmu->type = type;
|
||||
tx2_pmu->base = base;
|
||||
tx2_pmu->node = dev_to_node(dev);
|
||||
INIT_LIST_HEAD(&tx2_pmu->entry);
|
||||
|
||||
switch (tx2_pmu->type) {
|
||||
case PMU_TYPE_L3C:
|
||||
tx2_pmu->max_counters = TX2_PMU_MAX_COUNTERS;
|
||||
tx2_pmu->prorate_factor = TX2_PMU_L3_TILES;
|
||||
tx2_pmu->max_events = L3_EVENT_MAX;
|
||||
tx2_pmu->hrtimer_interval = TX2_PMU_HRTIMER_INTERVAL;
|
||||
tx2_pmu->attr_groups = l3c_pmu_attr_groups;
|
||||
tx2_pmu->name = devm_kasprintf(dev, GFP_KERNEL,
|
||||
"uncore_l3c_%d", tx2_pmu->node);
|
||||
tx2_pmu->init_cntr_base = init_cntr_base_l3c;
|
||||
tx2_pmu->start_event = uncore_start_event_l3c;
|
||||
tx2_pmu->stop_event = uncore_stop_event_l3c;
|
||||
break;
|
||||
case PMU_TYPE_DMC:
|
||||
tx2_pmu->max_counters = TX2_PMU_MAX_COUNTERS;
|
||||
tx2_pmu->prorate_factor = TX2_PMU_DMC_CHANNELS;
|
||||
tx2_pmu->max_events = DMC_EVENT_MAX;
|
||||
tx2_pmu->hrtimer_interval = TX2_PMU_HRTIMER_INTERVAL;
|
||||
tx2_pmu->attr_groups = dmc_pmu_attr_groups;
|
||||
tx2_pmu->name = devm_kasprintf(dev, GFP_KERNEL,
|
||||
"uncore_dmc_%d", tx2_pmu->node);
|
||||
tx2_pmu->init_cntr_base = init_cntr_base_dmc;
|
||||
tx2_pmu->start_event = uncore_start_event_dmc;
|
||||
tx2_pmu->stop_event = uncore_stop_event_dmc;
|
||||
break;
|
||||
case PMU_TYPE_INVALID:
|
||||
devm_kfree(dev, tx2_pmu);
|
||||
return NULL;
|
||||
}
|
||||
|
||||
return tx2_pmu;
|
||||
}
|
||||
|
||||
static acpi_status tx2_uncore_pmu_add(acpi_handle handle, u32 level,
|
||||
void *data, void **return_value)
|
||||
{
|
||||
struct tx2_uncore_pmu *tx2_pmu;
|
||||
struct acpi_device *adev;
|
||||
enum tx2_uncore_type type;
|
||||
|
||||
if (acpi_bus_get_device(handle, &adev))
|
||||
return AE_OK;
|
||||
if (acpi_bus_get_status(adev) || !adev->status.present)
|
||||
return AE_OK;
|
||||
|
||||
type = get_tx2_pmu_type(adev);
|
||||
if (type == PMU_TYPE_INVALID)
|
||||
return AE_OK;
|
||||
|
||||
tx2_pmu = tx2_uncore_pmu_init_dev((struct device *)data,
|
||||
handle, adev, type);
|
||||
|
||||
if (!tx2_pmu)
|
||||
return AE_ERROR;
|
||||
|
||||
if (tx2_uncore_pmu_add_dev(tx2_pmu)) {
|
||||
/* Can't add the PMU device, abort */
|
||||
return AE_ERROR;
|
||||
}
|
||||
return AE_OK;
|
||||
}
|
||||
|
||||
static int tx2_uncore_pmu_online_cpu(unsigned int cpu,
|
||||
struct hlist_node *hpnode)
|
||||
{
|
||||
struct tx2_uncore_pmu *tx2_pmu;
|
||||
|
||||
tx2_pmu = hlist_entry_safe(hpnode,
|
||||
struct tx2_uncore_pmu, hpnode);
|
||||
|
||||
/* Pick this CPU, If there is no CPU/PMU association and both are
|
||||
* from same node.
|
||||
*/
|
||||
if ((tx2_pmu->cpu >= nr_cpu_ids) &&
|
||||
(tx2_pmu->node == cpu_to_node(cpu)))
|
||||
tx2_pmu->cpu = cpu;
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int tx2_uncore_pmu_offline_cpu(unsigned int cpu,
|
||||
struct hlist_node *hpnode)
|
||||
{
|
||||
int new_cpu;
|
||||
struct tx2_uncore_pmu *tx2_pmu;
|
||||
struct cpumask cpu_online_mask_temp;
|
||||
|
||||
tx2_pmu = hlist_entry_safe(hpnode,
|
||||
struct tx2_uncore_pmu, hpnode);
|
||||
|
||||
if (cpu != tx2_pmu->cpu)
|
||||
return 0;
|
||||
|
||||
hrtimer_cancel(&tx2_pmu->hrtimer);
|
||||
cpumask_copy(&cpu_online_mask_temp, cpu_online_mask);
|
||||
cpumask_clear_cpu(cpu, &cpu_online_mask_temp);
|
||||
new_cpu = cpumask_any_and(
|
||||
cpumask_of_node(tx2_pmu->node),
|
||||
&cpu_online_mask_temp);
|
||||
|
||||
tx2_pmu->cpu = new_cpu;
|
||||
if (new_cpu >= nr_cpu_ids)
|
||||
return 0;
|
||||
perf_pmu_migrate_context(&tx2_pmu->pmu, cpu, new_cpu);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static const struct acpi_device_id tx2_uncore_acpi_match[] = {
|
||||
{"CAV901C", 0},
|
||||
{},
|
||||
};
|
||||
MODULE_DEVICE_TABLE(acpi, tx2_uncore_acpi_match);
|
||||
|
||||
static int tx2_uncore_probe(struct platform_device *pdev)
|
||||
{
|
||||
struct device *dev = &pdev->dev;
|
||||
acpi_handle handle;
|
||||
acpi_status status;
|
||||
|
||||
set_dev_node(dev, acpi_get_node(ACPI_HANDLE(dev)));
|
||||
|
||||
if (!has_acpi_companion(dev))
|
||||
return -ENODEV;
|
||||
|
||||
handle = ACPI_HANDLE(dev);
|
||||
if (!handle)
|
||||
return -EINVAL;
|
||||
|
||||
/* Walk through the tree for all PMU UNCORE devices */
|
||||
status = acpi_walk_namespace(ACPI_TYPE_DEVICE, handle, 1,
|
||||
tx2_uncore_pmu_add,
|
||||
NULL, dev, NULL);
|
||||
if (ACPI_FAILURE(status)) {
|
||||
dev_err(dev, "failed to probe PMU devices\n");
|
||||
return_ACPI_STATUS(status);
|
||||
}
|
||||
|
||||
dev_info(dev, "node%d: pmu uncore registered\n", dev_to_node(dev));
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int tx2_uncore_remove(struct platform_device *pdev)
|
||||
{
|
||||
struct tx2_uncore_pmu *tx2_pmu, *temp;
|
||||
struct device *dev = &pdev->dev;
|
||||
|
||||
if (!list_empty(&tx2_pmus)) {
|
||||
list_for_each_entry_safe(tx2_pmu, temp, &tx2_pmus, entry) {
|
||||
if (tx2_pmu->node == dev_to_node(dev)) {
|
||||
cpuhp_state_remove_instance_nocalls(
|
||||
CPUHP_AP_PERF_ARM_CAVIUM_TX2_UNCORE_ONLINE,
|
||||
&tx2_pmu->hpnode);
|
||||
perf_pmu_unregister(&tx2_pmu->pmu);
|
||||
list_del(&tx2_pmu->entry);
|
||||
}
|
||||
}
|
||||
}
|
||||
return 0;
|
||||
}
|
||||
|
||||
static struct platform_driver tx2_uncore_driver = {
|
||||
.driver = {
|
||||
.name = "tx2-uncore-pmu",
|
||||
.acpi_match_table = ACPI_PTR(tx2_uncore_acpi_match),
|
||||
},
|
||||
.probe = tx2_uncore_probe,
|
||||
.remove = tx2_uncore_remove,
|
||||
};
|
||||
|
||||
static int __init tx2_uncore_driver_init(void)
|
||||
{
|
||||
int ret;
|
||||
|
||||
ret = cpuhp_setup_state_multi(CPUHP_AP_PERF_ARM_CAVIUM_TX2_UNCORE_ONLINE,
|
||||
"perf/tx2/uncore:online",
|
||||
tx2_uncore_pmu_online_cpu,
|
||||
tx2_uncore_pmu_offline_cpu);
|
||||
if (ret) {
|
||||
pr_err("TX2 PMU: setup hotplug failed(%d)\n", ret);
|
||||
return ret;
|
||||
}
|
||||
ret = platform_driver_register(&tx2_uncore_driver);
|
||||
if (ret)
|
||||
cpuhp_remove_multi_state(CPUHP_AP_PERF_ARM_CAVIUM_TX2_UNCORE_ONLINE);
|
||||
|
||||
return ret;
|
||||
}
|
||||
module_init(tx2_uncore_driver_init);
|
||||
|
||||
static void __exit tx2_uncore_driver_exit(void)
|
||||
{
|
||||
platform_driver_unregister(&tx2_uncore_driver);
|
||||
cpuhp_remove_multi_state(CPUHP_AP_PERF_ARM_CAVIUM_TX2_UNCORE_ONLINE);
|
||||
}
|
||||
module_exit(tx2_uncore_driver_exit);
|
||||
|
||||
MODULE_DESCRIPTION("ThunderX2 UNCORE PMU driver");
|
||||
MODULE_LICENSE("GPL v2");
|
||||
MODULE_AUTHOR("Ganapatrao Kulkarni <gkulkarni@cavium.com>");
|
||||
|
|
@ -165,6 +165,7 @@ enum cpuhp_state {
|
|||
CPUHP_AP_PERF_ARM_QCOM_L2_ONLINE,
|
||||
CPUHP_AP_PERF_ARM_QCOM_L3_ONLINE,
|
||||
CPUHP_AP_PERF_ARM_APM_XGENE_ONLINE,
|
||||
CPUHP_AP_PERF_ARM_CAVIUM_TX2_UNCORE_ONLINE,
|
||||
CPUHP_AP_PERF_POWERPC_NEST_IMC_ONLINE,
|
||||
CPUHP_AP_PERF_POWERPC_CORE_IMC_ONLINE,
|
||||
CPUHP_AP_PERF_POWERPC_THREAD_IMC_ONLINE,
|
||||
|
|
|
|||
Loading…
Reference in New Issue