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![Rafael J. Wysocki](/assets/img/avatar_default.png)
Replace acpi_bus_get_device() that is going to be dropped with acpi_fetch_acpi_dev(). No intentional functional impact. Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> Acked-by: Will Deacon <will@kernel.org> Link: https://lore.kernel.org/r/10025610.nUPlyArG6x@kreacher Signed-off-by: Will Deacon <will@kernel.org>
1054 lines
27 KiB
C
1054 lines
27 KiB
C
// 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_DMC_L3C_MAX_COUNTERS 4
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#define TX2_PMU_CCPI2_MAX_COUNTERS 8
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#define TX2_PMU_MAX_COUNTERS TX2_PMU_CCPI2_MAX_COUNTERS
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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, mask) ((ev->hw.config) & mask)
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#define GET_COUNTERID(ev, mask) ((ev->hw.idx) & mask)
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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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/* bits[3:0] to select counters, are indexed from 8 to 15. */
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#define CCPI2_COUNTER_OFFSET 8
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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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#define CCPI2_PERF_CTL 0x108
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#define CCPI2_COUNTER_CTL 0x10C
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#define CCPI2_COUNTER_SEL 0x12c
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#define CCPI2_COUNTER_DATA_L 0x130
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#define CCPI2_COUNTER_DATA_H 0x134
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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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#define CCPI2_EVENT_REQ_PKT_SENT 0x3D
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#define CCPI2_EVENT_SNOOP_PKT_SENT 0x65
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#define CCPI2_EVENT_DATA_PKT_SENT 0x105
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#define CCPI2_EVENT_GIC_PKT_SENT 0x12D
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#define CCPI2_EVENT_MAX 0x200
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#define CCPI2_PERF_CTL_ENABLE BIT(0)
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#define CCPI2_PERF_CTL_START BIT(1)
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#define CCPI2_PERF_CTL_RESET BIT(4)
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#define CCPI2_EVENT_LEVEL_RISING_EDGE BIT(10)
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#define CCPI2_EVENT_TYPE_EDGE_SENSITIVE BIT(11)
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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_CCPI2,
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PMU_TYPE_INVALID,
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};
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/*
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* Each socket has 3 uncore devices associated with a PMU. The DMC and
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* L3C have 4 32-bit counters and the CCPI2 has 8 64-bit 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 counters_mask;
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u32 prorate_factor;
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u32 max_events;
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u32 events_mask;
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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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enum hrtimer_restart (*hrtimer_callback)(struct hrtimer *cb);
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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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#define TX2_PMU_FORMAT_ATTR(_var, _name, _format) \
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static ssize_t \
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__tx2_pmu_##_var##_show(struct device *dev, \
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struct device_attribute *attr, \
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char *page) \
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{ \
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BUILD_BUG_ON(sizeof(_format) >= PAGE_SIZE); \
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return sysfs_emit(page, _format "\n"); \
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} \
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\
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static struct device_attribute format_attr_##_var = \
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__ATTR(_name, 0444, __tx2_pmu_##_var##_show, NULL)
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TX2_PMU_FORMAT_ATTR(event, event, "config:0-4");
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TX2_PMU_FORMAT_ATTR(event_ccpi2, event, "config:0-9");
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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 struct attribute *ccpi2_pmu_format_attrs[] = {
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&format_attr_event_ccpi2.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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static const struct attribute_group ccpi2_pmu_format_attr_group = {
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.name = "format",
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.attrs = ccpi2_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 sysfs_emit(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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TX2_EVENT_ATTR(req_pktsent, CCPI2_EVENT_REQ_PKT_SENT);
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TX2_EVENT_ATTR(snoop_pktsent, CCPI2_EVENT_SNOOP_PKT_SENT);
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TX2_EVENT_ATTR(data_pktsent, CCPI2_EVENT_DATA_PKT_SENT);
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TX2_EVENT_ATTR(gic_pktsent, CCPI2_EVENT_GIC_PKT_SENT);
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static struct attribute *ccpi2_pmu_events_attrs[] = {
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&tx2_pmu_event_attr_req_pktsent.attr.attr,
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&tx2_pmu_event_attr_snoop_pktsent.attr.attr,
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&tx2_pmu_event_attr_data_pktsent.attr.attr,
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&tx2_pmu_event_attr_gic_pktsent.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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static const struct attribute_group ccpi2_pmu_events_attr_group = {
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.name = "events",
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.attrs = ccpi2_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 const struct attribute_group *ccpi2_pmu_attr_groups[] = {
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&ccpi2_pmu_format_attr_group,
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&pmu_cpumask_attr_group,
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&ccpi2_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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u32 cmask;
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tx2_pmu = pmu_to_tx2_pmu(event->pmu);
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cmask = tx2_pmu->counters_mask;
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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, cmask));
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hwc->event_base = (unsigned long)tx2_pmu->base
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+ L3C_COUNTER_DATA + (8 * GET_COUNTERID(event, cmask));
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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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u32 cmask;
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tx2_pmu = pmu_to_tx2_pmu(event->pmu);
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cmask = tx2_pmu->counters_mask;
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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, cmask));
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}
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static void init_cntr_base_ccpi2(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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u32 cmask;
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cmask = tx2_pmu->counters_mask;
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hwc->config_base = (unsigned long)tx2_pmu->base
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+ CCPI2_COUNTER_CTL + (4 * GET_COUNTERID(event, cmask));
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hwc->event_base = (unsigned long)tx2_pmu->base;
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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, emask;
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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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tx2_pmu = pmu_to_tx2_pmu(event->pmu);
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emask = tx2_pmu->events_mask;
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/* event id encoded in bits [07:03] */
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val = GET_EVENTID(event, emask) << 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, cmask, emask;
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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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int idx, event_id;
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tx2_pmu = pmu_to_tx2_pmu(event->pmu);
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cmask = tx2_pmu->counters_mask;
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emask = tx2_pmu->events_mask;
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idx = GET_COUNTERID(event, cmask);
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event_id = GET_EVENTID(event, emask);
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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, cmask;
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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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int idx;
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tx2_pmu = pmu_to_tx2_pmu(event->pmu);
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cmask = tx2_pmu->counters_mask;
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idx = GET_COUNTERID(event, cmask);
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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 uncore_start_event_ccpi2(struct perf_event *event, int flags)
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{
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u32 emask;
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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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tx2_pmu = pmu_to_tx2_pmu(event->pmu);
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emask = tx2_pmu->events_mask;
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|
|
|
/* Bit [09:00] to set event id.
|
|
* Bits [10], set level to rising edge.
|
|
* Bits [11], set type to edge sensitive.
|
|
*/
|
|
reg_writel((CCPI2_EVENT_TYPE_EDGE_SENSITIVE |
|
|
CCPI2_EVENT_LEVEL_RISING_EDGE |
|
|
GET_EVENTID(event, emask)), hwc->config_base);
|
|
|
|
/* reset[4], enable[0] and start[1] counters */
|
|
reg_writel(CCPI2_PERF_CTL_RESET |
|
|
CCPI2_PERF_CTL_START |
|
|
CCPI2_PERF_CTL_ENABLE,
|
|
hwc->event_base + CCPI2_PERF_CTL);
|
|
local64_set(&event->hw.prev_count, 0ULL);
|
|
}
|
|
|
|
static void uncore_stop_event_ccpi2(struct perf_event *event)
|
|
{
|
|
struct hw_perf_event *hwc = &event->hw;
|
|
|
|
/* disable and stop counter */
|
|
reg_writel(0, hwc->event_base + CCPI2_PERF_CTL);
|
|
}
|
|
|
|
static void tx2_uncore_event_update(struct perf_event *event)
|
|
{
|
|
u64 prev, delta, new = 0;
|
|
struct hw_perf_event *hwc = &event->hw;
|
|
struct tx2_uncore_pmu *tx2_pmu;
|
|
enum tx2_uncore_type type;
|
|
u32 prorate_factor;
|
|
u32 cmask, emask;
|
|
|
|
tx2_pmu = pmu_to_tx2_pmu(event->pmu);
|
|
type = tx2_pmu->type;
|
|
cmask = tx2_pmu->counters_mask;
|
|
emask = tx2_pmu->events_mask;
|
|
prorate_factor = tx2_pmu->prorate_factor;
|
|
if (type == PMU_TYPE_CCPI2) {
|
|
reg_writel(CCPI2_COUNTER_OFFSET +
|
|
GET_COUNTERID(event, cmask),
|
|
hwc->event_base + CCPI2_COUNTER_SEL);
|
|
new = reg_readl(hwc->event_base + CCPI2_COUNTER_DATA_H);
|
|
new = (new << 32) +
|
|
reg_readl(hwc->event_base + CCPI2_COUNTER_DATA_L);
|
|
prev = local64_xchg(&hwc->prev_count, new);
|
|
delta = new - prev;
|
|
} else {
|
|
new = reg_readl(hwc->event_base);
|
|
prev = local64_xchg(&hwc->prev_count, new);
|
|
/* handles rollover of 32 bit counter */
|
|
delta = (u32)(((1ULL << 32) - prev) + new);
|
|
}
|
|
|
|
/* DMC event data_transfers granularity is 16 Bytes, convert it to 64 */
|
|
if (type == PMU_TYPE_DMC &&
|
|
GET_EVENTID(event, emask) == DMC_EVENT_DATA_TRANSFERS)
|
|
delta = delta/4;
|
|
|
|
/* L3C and DMC has 16 and 8 interleave channels respectively.
|
|
* The sampled value is for channel 0 and multiplied with
|
|
* prorate_factor to get the count for a device.
|
|
*/
|
|
local64_add(delta * prorate_factor, &event->count);
|
|
}
|
|
|
|
static enum tx2_uncore_type get_tx2_pmu_type(struct acpi_device *adev)
|
|
{
|
|
int i = 0;
|
|
struct acpi_tx2_pmu_device {
|
|
__u8 id[ACPI_ID_LEN];
|
|
enum tx2_uncore_type type;
|
|
} devices[] = {
|
|
{"CAV901D", PMU_TYPE_L3C},
|
|
{"CAV901F", PMU_TYPE_DMC},
|
|
{"CAV901E", PMU_TYPE_CCPI2},
|
|
{"", PMU_TYPE_INVALID}
|
|
};
|
|
|
|
while (devices[i].type != PMU_TYPE_INVALID) {
|
|
if (!strcmp(acpi_device_hid(adev), devices[i].id))
|
|
break;
|
|
i++;
|
|
}
|
|
|
|
return devices[i].type;
|
|
}
|
|
|
|
static bool tx2_uncore_validate_event(struct pmu *pmu,
|
|
struct perf_event *event, int *counters)
|
|
{
|
|
if (is_software_event(event))
|
|
return true;
|
|
/* Reject groups spanning multiple HW PMUs. */
|
|
if (event->pmu != pmu)
|
|
return false;
|
|
|
|
*counters = *counters + 1;
|
|
return true;
|
|
}
|
|
|
|
/*
|
|
* Make sure the group of events can be scheduled at once
|
|
* on the PMU.
|
|
*/
|
|
static bool tx2_uncore_validate_event_group(struct perf_event *event,
|
|
int max_counters)
|
|
{
|
|
struct perf_event *sibling, *leader = event->group_leader;
|
|
int counters = 0;
|
|
|
|
if (event->group_leader == event)
|
|
return true;
|
|
|
|
if (!tx2_uncore_validate_event(event->pmu, leader, &counters))
|
|
return false;
|
|
|
|
for_each_sibling_event(sibling, leader) {
|
|
if (!tx2_uncore_validate_event(event->pmu, sibling, &counters))
|
|
return false;
|
|
}
|
|
|
|
if (!tx2_uncore_validate_event(event->pmu, event, &counters))
|
|
return false;
|
|
|
|
/*
|
|
* If the group requires more counters than the HW has,
|
|
* it cannot ever be scheduled.
|
|
*/
|
|
return counters <= max_counters;
|
|
}
|
|
|
|
|
|
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;
|
|
|
|
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, tx2_pmu->max_counters))
|
|
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);
|
|
|
|
/* No hrtimer needed for CCPI2, 64-bit counters */
|
|
if (!tx2_pmu->hrtimer_callback)
|
|
return;
|
|
|
|
/* 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;
|
|
u32 cmask;
|
|
|
|
cmask = tx2_pmu->counters_mask;
|
|
tx2_uncore_event_stop(event, PERF_EF_UPDATE);
|
|
|
|
/* clear the assigned counter */
|
|
free_counter(tx2_pmu, GET_COUNTERID(event, cmask));
|
|
|
|
perf_event_update_userpage(event);
|
|
tx2_pmu->events[hwc->idx] = NULL;
|
|
hwc->idx = -1;
|
|
|
|
if (!tx2_pmu->hrtimer_callback)
|
|
return;
|
|
|
|
if (bitmap_empty(tx2_pmu->active_counters, tx2_pmu->max_counters))
|
|
hrtimer_cancel(&tx2_pmu->hrtimer);
|
|
}
|
|
|
|
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,
|
|
.capabilities = PERF_PMU_CAP_NO_EXCLUDE,
|
|
};
|
|
|
|
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;
|
|
|
|
if (tx2_pmu->hrtimer_callback) {
|
|
hrtimer_init(&tx2_pmu->hrtimer,
|
|
CLOCK_MONOTONIC, HRTIMER_MODE_REL);
|
|
tx2_pmu->hrtimer.function = tx2_pmu->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;
|
|
rentry = NULL;
|
|
break;
|
|
}
|
|
}
|
|
acpi_dev_free_resource_list(&list);
|
|
|
|
if (rentry) {
|
|
dev_err(dev, "PMU type %d: Fail to find resource\n", type);
|
|
return NULL;
|
|
}
|
|
|
|
base = devm_ioremap_resource(dev, &res);
|
|
if (IS_ERR(base))
|
|
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_DMC_L3C_MAX_COUNTERS;
|
|
tx2_pmu->counters_mask = 0x3;
|
|
tx2_pmu->prorate_factor = TX2_PMU_L3_TILES;
|
|
tx2_pmu->max_events = L3_EVENT_MAX;
|
|
tx2_pmu->events_mask = 0x1f;
|
|
tx2_pmu->hrtimer_interval = TX2_PMU_HRTIMER_INTERVAL;
|
|
tx2_pmu->hrtimer_callback = tx2_hrtimer_callback;
|
|
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_DMC_L3C_MAX_COUNTERS;
|
|
tx2_pmu->counters_mask = 0x3;
|
|
tx2_pmu->prorate_factor = TX2_PMU_DMC_CHANNELS;
|
|
tx2_pmu->max_events = DMC_EVENT_MAX;
|
|
tx2_pmu->events_mask = 0x1f;
|
|
tx2_pmu->hrtimer_interval = TX2_PMU_HRTIMER_INTERVAL;
|
|
tx2_pmu->hrtimer_callback = tx2_hrtimer_callback;
|
|
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_CCPI2:
|
|
/* CCPI2 has 8 counters */
|
|
tx2_pmu->max_counters = TX2_PMU_CCPI2_MAX_COUNTERS;
|
|
tx2_pmu->counters_mask = 0x7;
|
|
tx2_pmu->prorate_factor = 1;
|
|
tx2_pmu->max_events = CCPI2_EVENT_MAX;
|
|
tx2_pmu->events_mask = 0x1ff;
|
|
tx2_pmu->attr_groups = ccpi2_pmu_attr_groups;
|
|
tx2_pmu->name = devm_kasprintf(dev, GFP_KERNEL,
|
|
"uncore_ccpi2_%d", tx2_pmu->node);
|
|
tx2_pmu->init_cntr_base = init_cntr_base_ccpi2;
|
|
tx2_pmu->start_event = uncore_start_event_ccpi2;
|
|
tx2_pmu->stop_event = uncore_stop_event_ccpi2;
|
|
tx2_pmu->hrtimer_callback = NULL;
|
|
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 acpi_device *adev = acpi_fetch_acpi_dev(handle);
|
|
struct tx2_uncore_pmu *tx2_pmu;
|
|
enum tx2_uncore_type type;
|
|
|
|
if (!adev || 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;
|
|
|
|
if (tx2_pmu->hrtimer_callback)
|
|
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),
|
|
.suppress_bind_attrs = true,
|
|
},
|
|
.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>");
|