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linux/drivers/perf/xgene_pmu.c
Uwe Kleine-König b07ebe8f14 perf: xgene: Convert to platform remove callback returning void 
The .remove() callback for a platform driver returns an int which makes
many driver authors wrongly assume it's possible to do error handling by
returning an error code. However the value returned is ignored (apart
from emitting a warning) and this typically results in resource leaks.

To improve here there is a quest to make the remove callback return
void. In the first step of this quest all drivers are converted to
.remove_new(), which already returns void. Eventually after all drivers
are converted, .remove_new() will be renamed to .remove().

Trivially convert this driver from always returning zero in the remove
callback to the void returning variant.

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Link: https://lore.kernel.org/r/75dda01b2ad6e17f726830094bd38cb8faab5cbe.1702648125.git.u.kleine-koenig@pengutronix.de
Signed-off-by: Will Deacon <will@kernel.org>
2024-02-09 15:59:30 +00:00

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// SPDX-License-Identifier: GPL-2.0-or-later
/*
* APM X-Gene SoC PMU (Performance Monitor Unit)
*
* Copyright (c) 2016, Applied Micro Circuits Corporation
* Author: Hoan Tran <hotran@apm.com>
* Tai Nguyen <ttnguyen@apm.com>
*/
#include <linux/acpi.h>
#include <linux/clk.h>
#include <linux/cpuhotplug.h>
#include <linux/cpumask.h>
#include <linux/interrupt.h>
#include <linux/io.h>
#include <linux/mfd/syscon.h>
#include <linux/module.h>
#include <linux/of_address.h>
#include <linux/perf_event.h>
#include <linux/platform_device.h>
#include <linux/property.h>
#include <linux/regmap.h>
#include <linux/slab.h>
#define CSW_CSWCR 0x0000
#define CSW_CSWCR_DUALMCB_MASK BIT(0)
#define CSW_CSWCR_MCB0_ROUTING(x) (((x) & 0x0C) >> 2)
#define CSW_CSWCR_MCB1_ROUTING(x) (((x) & 0x30) >> 4)
#define MCBADDRMR 0x0000
#define MCBADDRMR_DUALMCU_MODE_MASK BIT(2)
#define PCPPMU_INTSTATUS_REG 0x000
#define PCPPMU_INTMASK_REG 0x004
#define PCPPMU_INTMASK 0x0000000F
#define PCPPMU_INTENMASK 0xFFFFFFFF
#define PCPPMU_INTCLRMASK 0xFFFFFFF0
#define PCPPMU_INT_MCU BIT(0)
#define PCPPMU_INT_MCB BIT(1)
#define PCPPMU_INT_L3C BIT(2)
#define PCPPMU_INT_IOB BIT(3)
#define PCPPMU_V3_INTMASK 0x00FF33FF
#define PCPPMU_V3_INTENMASK 0xFFFFFFFF
#define PCPPMU_V3_INTCLRMASK 0xFF00CC00
#define PCPPMU_V3_INT_MCU 0x000000FF
#define PCPPMU_V3_INT_MCB 0x00000300
#define PCPPMU_V3_INT_L3C 0x00FF0000
#define PCPPMU_V3_INT_IOB 0x00003000
#define PMU_MAX_COUNTERS 4
#define PMU_CNT_MAX_PERIOD 0xFFFFFFFFULL
#define PMU_V3_CNT_MAX_PERIOD 0xFFFFFFFFFFFFFFFFULL
#define PMU_OVERFLOW_MASK 0xF
#define PMU_PMCR_E BIT(0)
#define PMU_PMCR_P BIT(1)
#define PMU_PMEVCNTR0 0x000
#define PMU_PMEVCNTR1 0x004
#define PMU_PMEVCNTR2 0x008
#define PMU_PMEVCNTR3 0x00C
#define PMU_PMEVTYPER0 0x400
#define PMU_PMEVTYPER1 0x404
#define PMU_PMEVTYPER2 0x408
#define PMU_PMEVTYPER3 0x40C
#define PMU_PMAMR0 0xA00
#define PMU_PMAMR1 0xA04
#define PMU_PMCNTENSET 0xC00
#define PMU_PMCNTENCLR 0xC20
#define PMU_PMINTENSET 0xC40
#define PMU_PMINTENCLR 0xC60
#define PMU_PMOVSR 0xC80
#define PMU_PMCR 0xE04
/* PMU registers for V3 */
#define PMU_PMOVSCLR 0xC80
#define PMU_PMOVSSET 0xCC0
#define to_pmu_dev(p) container_of(p, struct xgene_pmu_dev, pmu)
#define GET_CNTR(ev) (ev->hw.idx)
#define GET_EVENTID(ev) (ev->hw.config & 0xFFULL)
#define GET_AGENTID(ev) (ev->hw.config_base & 0xFFFFFFFFUL)
#define GET_AGENT1ID(ev) ((ev->hw.config_base >> 32) & 0xFFFFFFFFUL)
struct hw_pmu_info {
u32 type;
u32 enable_mask;
void __iomem *csr;
};
struct xgene_pmu_dev {
struct hw_pmu_info *inf;
struct xgene_pmu *parent;
struct pmu pmu;
u8 max_counters;
DECLARE_BITMAP(cntr_assign_mask, PMU_MAX_COUNTERS);
u64 max_period;
const struct attribute_group **attr_groups;
struct perf_event *pmu_counter_event[PMU_MAX_COUNTERS];
};
struct xgene_pmu_ops {
void (*mask_int)(struct xgene_pmu *pmu);
void (*unmask_int)(struct xgene_pmu *pmu);
u64 (*read_counter)(struct xgene_pmu_dev *pmu, int idx);
void (*write_counter)(struct xgene_pmu_dev *pmu, int idx, u64 val);
void (*write_evttype)(struct xgene_pmu_dev *pmu_dev, int idx, u32 val);
void (*write_agentmsk)(struct xgene_pmu_dev *pmu_dev, u32 val);
void (*write_agent1msk)(struct xgene_pmu_dev *pmu_dev, u32 val);
void (*enable_counter)(struct xgene_pmu_dev *pmu_dev, int idx);
void (*disable_counter)(struct xgene_pmu_dev *pmu_dev, int idx);
void (*enable_counter_int)(struct xgene_pmu_dev *pmu_dev, int idx);
void (*disable_counter_int)(struct xgene_pmu_dev *pmu_dev, int idx);
void (*reset_counters)(struct xgene_pmu_dev *pmu_dev);
void (*start_counters)(struct xgene_pmu_dev *pmu_dev);
void (*stop_counters)(struct xgene_pmu_dev *pmu_dev);
};
struct xgene_pmu {
struct device *dev;
struct hlist_node node;
int version;
void __iomem *pcppmu_csr;
u32 mcb_active_mask;
u32 mc_active_mask;
u32 l3c_active_mask;
cpumask_t cpu;
int irq;
raw_spinlock_t lock;
const struct xgene_pmu_ops *ops;
struct list_head l3cpmus;
struct list_head iobpmus;
struct list_head mcbpmus;
struct list_head mcpmus;
};
struct xgene_pmu_dev_ctx {
char *name;
struct list_head next;
struct xgene_pmu_dev *pmu_dev;
struct hw_pmu_info inf;
};
struct xgene_pmu_data {
int id;
u32 data;
};
enum xgene_pmu_version {
PCP_PMU_V1 = 1,
PCP_PMU_V2,
PCP_PMU_V3,
};
enum xgene_pmu_dev_type {
PMU_TYPE_L3C = 0,
PMU_TYPE_IOB,
PMU_TYPE_IOB_SLOW,
PMU_TYPE_MCB,
PMU_TYPE_MC,
};
/*
* sysfs format attributes
*/
static ssize_t xgene_pmu_format_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct dev_ext_attribute *eattr;
eattr = container_of(attr, struct dev_ext_attribute, attr);
return sysfs_emit(buf, "%s\n", (char *) eattr->var);
}
#define XGENE_PMU_FORMAT_ATTR(_name, _config) \
(&((struct dev_ext_attribute[]) { \
{ .attr = __ATTR(_name, S_IRUGO, xgene_pmu_format_show, NULL), \
.var = (void *) _config, } \
})[0].attr.attr)
static struct attribute *l3c_pmu_format_attrs[] = {
XGENE_PMU_FORMAT_ATTR(l3c_eventid, "config:0-7"),
XGENE_PMU_FORMAT_ATTR(l3c_agentid, "config1:0-9"),
NULL,
};
static struct attribute *iob_pmu_format_attrs[] = {
XGENE_PMU_FORMAT_ATTR(iob_eventid, "config:0-7"),
XGENE_PMU_FORMAT_ATTR(iob_agentid, "config1:0-63"),
NULL,
};
static struct attribute *mcb_pmu_format_attrs[] = {
XGENE_PMU_FORMAT_ATTR(mcb_eventid, "config:0-5"),
XGENE_PMU_FORMAT_ATTR(mcb_agentid, "config1:0-9"),
NULL,
};
static struct attribute *mc_pmu_format_attrs[] = {
XGENE_PMU_FORMAT_ATTR(mc_eventid, "config:0-28"),
NULL,
};
static const struct attribute_group l3c_pmu_format_attr_group = {
.name = "format",
.attrs = l3c_pmu_format_attrs,
};
static const struct attribute_group iob_pmu_format_attr_group = {
.name = "format",
.attrs = iob_pmu_format_attrs,
};
static const struct attribute_group mcb_pmu_format_attr_group = {
.name = "format",
.attrs = mcb_pmu_format_attrs,
};
static const struct attribute_group mc_pmu_format_attr_group = {
.name = "format",
.attrs = mc_pmu_format_attrs,
};
static struct attribute *l3c_pmu_v3_format_attrs[] = {
XGENE_PMU_FORMAT_ATTR(l3c_eventid, "config:0-39"),
NULL,
};
static struct attribute *iob_pmu_v3_format_attrs[] = {
XGENE_PMU_FORMAT_ATTR(iob_eventid, "config:0-47"),
NULL,
};
static struct attribute *iob_slow_pmu_v3_format_attrs[] = {
XGENE_PMU_FORMAT_ATTR(iob_slow_eventid, "config:0-16"),
NULL,
};
static struct attribute *mcb_pmu_v3_format_attrs[] = {
XGENE_PMU_FORMAT_ATTR(mcb_eventid, "config:0-35"),
NULL,
};
static struct attribute *mc_pmu_v3_format_attrs[] = {
XGENE_PMU_FORMAT_ATTR(mc_eventid, "config:0-44"),
NULL,
};
static const struct attribute_group l3c_pmu_v3_format_attr_group = {
.name = "format",
.attrs = l3c_pmu_v3_format_attrs,
};
static const struct attribute_group iob_pmu_v3_format_attr_group = {
.name = "format",
.attrs = iob_pmu_v3_format_attrs,
};
static const struct attribute_group iob_slow_pmu_v3_format_attr_group = {
.name = "format",
.attrs = iob_slow_pmu_v3_format_attrs,
};
static const struct attribute_group mcb_pmu_v3_format_attr_group = {
.name = "format",
.attrs = mcb_pmu_v3_format_attrs,
};
static const struct attribute_group mc_pmu_v3_format_attr_group = {
.name = "format",
.attrs = mc_pmu_v3_format_attrs,
};
/*
* sysfs event attributes
*/
static ssize_t xgene_pmu_event_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct perf_pmu_events_attr *pmu_attr =
container_of(attr, struct perf_pmu_events_attr, attr);
return sysfs_emit(buf, "config=0x%llx\n", pmu_attr->id);
}
#define XGENE_PMU_EVENT_ATTR(_name, _config) \
PMU_EVENT_ATTR_ID(_name, xgene_pmu_event_show, _config)
static struct attribute *l3c_pmu_events_attrs[] = {
XGENE_PMU_EVENT_ATTR(cycle-count, 0x00),
XGENE_PMU_EVENT_ATTR(cycle-count-div-64, 0x01),
XGENE_PMU_EVENT_ATTR(read-hit, 0x02),
XGENE_PMU_EVENT_ATTR(read-miss, 0x03),
XGENE_PMU_EVENT_ATTR(write-need-replacement, 0x06),
XGENE_PMU_EVENT_ATTR(write-not-need-replacement, 0x07),
XGENE_PMU_EVENT_ATTR(tq-full, 0x08),
XGENE_PMU_EVENT_ATTR(ackq-full, 0x09),
XGENE_PMU_EVENT_ATTR(wdb-full, 0x0a),
XGENE_PMU_EVENT_ATTR(bank-fifo-full, 0x0b),
XGENE_PMU_EVENT_ATTR(odb-full, 0x0c),
XGENE_PMU_EVENT_ATTR(wbq-full, 0x0d),
XGENE_PMU_EVENT_ATTR(bank-conflict-fifo-issue, 0x0e),
XGENE_PMU_EVENT_ATTR(bank-fifo-issue, 0x0f),
NULL,
};
static struct attribute *iob_pmu_events_attrs[] = {
XGENE_PMU_EVENT_ATTR(cycle-count, 0x00),
XGENE_PMU_EVENT_ATTR(cycle-count-div-64, 0x01),
XGENE_PMU_EVENT_ATTR(axi0-read, 0x02),
XGENE_PMU_EVENT_ATTR(axi0-read-partial, 0x03),
XGENE_PMU_EVENT_ATTR(axi1-read, 0x04),
XGENE_PMU_EVENT_ATTR(axi1-read-partial, 0x05),
XGENE_PMU_EVENT_ATTR(csw-read-block, 0x06),
XGENE_PMU_EVENT_ATTR(csw-read-partial, 0x07),
XGENE_PMU_EVENT_ATTR(axi0-write, 0x10),
XGENE_PMU_EVENT_ATTR(axi0-write-partial, 0x11),
XGENE_PMU_EVENT_ATTR(axi1-write, 0x13),
XGENE_PMU_EVENT_ATTR(axi1-write-partial, 0x14),
XGENE_PMU_EVENT_ATTR(csw-inbound-dirty, 0x16),
NULL,
};
static struct attribute *mcb_pmu_events_attrs[] = {
XGENE_PMU_EVENT_ATTR(cycle-count, 0x00),
XGENE_PMU_EVENT_ATTR(cycle-count-div-64, 0x01),
XGENE_PMU_EVENT_ATTR(csw-read, 0x02),
XGENE_PMU_EVENT_ATTR(csw-write-request, 0x03),
XGENE_PMU_EVENT_ATTR(mcb-csw-stall, 0x04),
XGENE_PMU_EVENT_ATTR(cancel-read-gack, 0x05),
NULL,
};
static struct attribute *mc_pmu_events_attrs[] = {
XGENE_PMU_EVENT_ATTR(cycle-count, 0x00),
XGENE_PMU_EVENT_ATTR(cycle-count-div-64, 0x01),
XGENE_PMU_EVENT_ATTR(act-cmd-sent, 0x02),
XGENE_PMU_EVENT_ATTR(pre-cmd-sent, 0x03),
XGENE_PMU_EVENT_ATTR(rd-cmd-sent, 0x04),
XGENE_PMU_EVENT_ATTR(rda-cmd-sent, 0x05),
XGENE_PMU_EVENT_ATTR(wr-cmd-sent, 0x06),
XGENE_PMU_EVENT_ATTR(wra-cmd-sent, 0x07),
XGENE_PMU_EVENT_ATTR(pde-cmd-sent, 0x08),
XGENE_PMU_EVENT_ATTR(sre-cmd-sent, 0x09),
XGENE_PMU_EVENT_ATTR(prea-cmd-sent, 0x0a),
XGENE_PMU_EVENT_ATTR(ref-cmd-sent, 0x0b),
XGENE_PMU_EVENT_ATTR(rd-rda-cmd-sent, 0x0c),
XGENE_PMU_EVENT_ATTR(wr-wra-cmd-sent, 0x0d),
XGENE_PMU_EVENT_ATTR(in-rd-collision, 0x0e),
XGENE_PMU_EVENT_ATTR(in-wr-collision, 0x0f),
XGENE_PMU_EVENT_ATTR(collision-queue-not-empty, 0x10),
XGENE_PMU_EVENT_ATTR(collision-queue-full, 0x11),
XGENE_PMU_EVENT_ATTR(mcu-request, 0x12),
XGENE_PMU_EVENT_ATTR(mcu-rd-request, 0x13),
XGENE_PMU_EVENT_ATTR(mcu-hp-rd-request, 0x14),
XGENE_PMU_EVENT_ATTR(mcu-wr-request, 0x15),
XGENE_PMU_EVENT_ATTR(mcu-rd-proceed-all, 0x16),
XGENE_PMU_EVENT_ATTR(mcu-rd-proceed-cancel, 0x17),
XGENE_PMU_EVENT_ATTR(mcu-rd-response, 0x18),
XGENE_PMU_EVENT_ATTR(mcu-rd-proceed-speculative-all, 0x19),
XGENE_PMU_EVENT_ATTR(mcu-rd-proceed-speculative-cancel, 0x1a),
XGENE_PMU_EVENT_ATTR(mcu-wr-proceed-all, 0x1b),
XGENE_PMU_EVENT_ATTR(mcu-wr-proceed-cancel, 0x1c),
NULL,
};
static const struct attribute_group l3c_pmu_events_attr_group = {
.name = "events",
.attrs = l3c_pmu_events_attrs,
};
static const struct attribute_group iob_pmu_events_attr_group = {
.name = "events",
.attrs = iob_pmu_events_attrs,
};
static const struct attribute_group mcb_pmu_events_attr_group = {
.name = "events",
.attrs = mcb_pmu_events_attrs,
};
static const struct attribute_group mc_pmu_events_attr_group = {
.name = "events",
.attrs = mc_pmu_events_attrs,
};
static struct attribute *l3c_pmu_v3_events_attrs[] = {
XGENE_PMU_EVENT_ATTR(cycle-count, 0x00),
XGENE_PMU_EVENT_ATTR(read-hit, 0x01),
XGENE_PMU_EVENT_ATTR(read-miss, 0x02),
XGENE_PMU_EVENT_ATTR(index-flush-eviction, 0x03),
XGENE_PMU_EVENT_ATTR(write-caused-replacement, 0x04),
XGENE_PMU_EVENT_ATTR(write-not-caused-replacement, 0x05),
XGENE_PMU_EVENT_ATTR(clean-eviction, 0x06),
XGENE_PMU_EVENT_ATTR(dirty-eviction, 0x07),
XGENE_PMU_EVENT_ATTR(read, 0x08),
XGENE_PMU_EVENT_ATTR(write, 0x09),
XGENE_PMU_EVENT_ATTR(request, 0x0a),
XGENE_PMU_EVENT_ATTR(tq-bank-conflict-issue-stall, 0x0b),
XGENE_PMU_EVENT_ATTR(tq-full, 0x0c),
XGENE_PMU_EVENT_ATTR(ackq-full, 0x0d),
XGENE_PMU_EVENT_ATTR(wdb-full, 0x0e),
XGENE_PMU_EVENT_ATTR(odb-full, 0x10),
XGENE_PMU_EVENT_ATTR(wbq-full, 0x11),
XGENE_PMU_EVENT_ATTR(input-req-async-fifo-stall, 0x12),
XGENE_PMU_EVENT_ATTR(output-req-async-fifo-stall, 0x13),
XGENE_PMU_EVENT_ATTR(output-data-async-fifo-stall, 0x14),
XGENE_PMU_EVENT_ATTR(total-insertion, 0x15),
XGENE_PMU_EVENT_ATTR(sip-insertions-r-set, 0x16),
XGENE_PMU_EVENT_ATTR(sip-insertions-r-clear, 0x17),
XGENE_PMU_EVENT_ATTR(dip-insertions-r-set, 0x18),
XGENE_PMU_EVENT_ATTR(dip-insertions-r-clear, 0x19),
XGENE_PMU_EVENT_ATTR(dip-insertions-force-r-set, 0x1a),
XGENE_PMU_EVENT_ATTR(egression, 0x1b),
XGENE_PMU_EVENT_ATTR(replacement, 0x1c),
XGENE_PMU_EVENT_ATTR(old-replacement, 0x1d),
XGENE_PMU_EVENT_ATTR(young-replacement, 0x1e),
XGENE_PMU_EVENT_ATTR(r-set-replacement, 0x1f),
XGENE_PMU_EVENT_ATTR(r-clear-replacement, 0x20),
XGENE_PMU_EVENT_ATTR(old-r-replacement, 0x21),
XGENE_PMU_EVENT_ATTR(old-nr-replacement, 0x22),
XGENE_PMU_EVENT_ATTR(young-r-replacement, 0x23),
XGENE_PMU_EVENT_ATTR(young-nr-replacement, 0x24),
XGENE_PMU_EVENT_ATTR(bloomfilter-clearing, 0x25),
XGENE_PMU_EVENT_ATTR(generation-flip, 0x26),
XGENE_PMU_EVENT_ATTR(vcc-droop-detected, 0x27),
NULL,
};
static struct attribute *iob_fast_pmu_v3_events_attrs[] = {
XGENE_PMU_EVENT_ATTR(cycle-count, 0x00),
XGENE_PMU_EVENT_ATTR(pa-req-buf-alloc-all, 0x01),
XGENE_PMU_EVENT_ATTR(pa-req-buf-alloc-rd, 0x02),
XGENE_PMU_EVENT_ATTR(pa-req-buf-alloc-wr, 0x03),
XGENE_PMU_EVENT_ATTR(pa-all-cp-req, 0x04),
XGENE_PMU_EVENT_ATTR(pa-cp-blk-req, 0x05),
XGENE_PMU_EVENT_ATTR(pa-cp-ptl-req, 0x06),
XGENE_PMU_EVENT_ATTR(pa-cp-rd-req, 0x07),
XGENE_PMU_EVENT_ATTR(pa-cp-wr-req, 0x08),
XGENE_PMU_EVENT_ATTR(ba-all-req, 0x09),
XGENE_PMU_EVENT_ATTR(ba-rd-req, 0x0a),
XGENE_PMU_EVENT_ATTR(ba-wr-req, 0x0b),
XGENE_PMU_EVENT_ATTR(pa-rd-shared-req-issued, 0x10),
XGENE_PMU_EVENT_ATTR(pa-rd-exclusive-req-issued, 0x11),
XGENE_PMU_EVENT_ATTR(pa-wr-invalidate-req-issued-stashable, 0x12),
XGENE_PMU_EVENT_ATTR(pa-wr-invalidate-req-issued-nonstashable, 0x13),
XGENE_PMU_EVENT_ATTR(pa-wr-back-req-issued-stashable, 0x14),
XGENE_PMU_EVENT_ATTR(pa-wr-back-req-issued-nonstashable, 0x15),
XGENE_PMU_EVENT_ATTR(pa-ptl-wr-req, 0x16),
XGENE_PMU_EVENT_ATTR(pa-ptl-rd-req, 0x17),
XGENE_PMU_EVENT_ATTR(pa-wr-back-clean-data, 0x18),
XGENE_PMU_EVENT_ATTR(pa-wr-back-cancelled-on-SS, 0x1b),
XGENE_PMU_EVENT_ATTR(pa-barrier-occurrence, 0x1c),
XGENE_PMU_EVENT_ATTR(pa-barrier-cycles, 0x1d),
XGENE_PMU_EVENT_ATTR(pa-total-cp-snoops, 0x20),
XGENE_PMU_EVENT_ATTR(pa-rd-shared-snoop, 0x21),
XGENE_PMU_EVENT_ATTR(pa-rd-shared-snoop-hit, 0x22),
XGENE_PMU_EVENT_ATTR(pa-rd-exclusive-snoop, 0x23),
XGENE_PMU_EVENT_ATTR(pa-rd-exclusive-snoop-hit, 0x24),
XGENE_PMU_EVENT_ATTR(pa-rd-wr-invalid-snoop, 0x25),
XGENE_PMU_EVENT_ATTR(pa-rd-wr-invalid-snoop-hit, 0x26),
XGENE_PMU_EVENT_ATTR(pa-req-buffer-full, 0x28),
XGENE_PMU_EVENT_ATTR(cswlf-outbound-req-fifo-full, 0x29),
XGENE_PMU_EVENT_ATTR(cswlf-inbound-snoop-fifo-backpressure, 0x2a),
XGENE_PMU_EVENT_ATTR(cswlf-outbound-lack-fifo-full, 0x2b),
XGENE_PMU_EVENT_ATTR(cswlf-inbound-gack-fifo-backpressure, 0x2c),
XGENE_PMU_EVENT_ATTR(cswlf-outbound-data-fifo-full, 0x2d),
XGENE_PMU_EVENT_ATTR(cswlf-inbound-data-fifo-backpressure, 0x2e),
XGENE_PMU_EVENT_ATTR(cswlf-inbound-req-backpressure, 0x2f),
NULL,
};
static struct attribute *iob_slow_pmu_v3_events_attrs[] = {
XGENE_PMU_EVENT_ATTR(cycle-count, 0x00),
XGENE_PMU_EVENT_ATTR(pa-axi0-rd-req, 0x01),
XGENE_PMU_EVENT_ATTR(pa-axi0-wr-req, 0x02),
XGENE_PMU_EVENT_ATTR(pa-axi1-rd-req, 0x03),
XGENE_PMU_EVENT_ATTR(pa-axi1-wr-req, 0x04),
XGENE_PMU_EVENT_ATTR(ba-all-axi-req, 0x07),
XGENE_PMU_EVENT_ATTR(ba-axi-rd-req, 0x08),
XGENE_PMU_EVENT_ATTR(ba-axi-wr-req, 0x09),
XGENE_PMU_EVENT_ATTR(ba-free-list-empty, 0x10),
NULL,
};
static struct attribute *mcb_pmu_v3_events_attrs[] = {
XGENE_PMU_EVENT_ATTR(cycle-count, 0x00),
XGENE_PMU_EVENT_ATTR(req-receive, 0x01),
XGENE_PMU_EVENT_ATTR(rd-req-recv, 0x02),
XGENE_PMU_EVENT_ATTR(rd-req-recv-2, 0x03),
XGENE_PMU_EVENT_ATTR(wr-req-recv, 0x04),
XGENE_PMU_EVENT_ATTR(wr-req-recv-2, 0x05),
XGENE_PMU_EVENT_ATTR(rd-req-sent-to-mcu, 0x06),
XGENE_PMU_EVENT_ATTR(rd-req-sent-to-mcu-2, 0x07),
XGENE_PMU_EVENT_ATTR(rd-req-sent-to-spec-mcu, 0x08),
XGENE_PMU_EVENT_ATTR(rd-req-sent-to-spec-mcu-2, 0x09),
XGENE_PMU_EVENT_ATTR(glbl-ack-recv-for-rd-sent-to-spec-mcu, 0x0a),
XGENE_PMU_EVENT_ATTR(glbl-ack-go-recv-for-rd-sent-to-spec-mcu, 0x0b),
XGENE_PMU_EVENT_ATTR(glbl-ack-nogo-recv-for-rd-sent-to-spec-mcu, 0x0c),
XGENE_PMU_EVENT_ATTR(glbl-ack-go-recv-any-rd-req, 0x0d),
XGENE_PMU_EVENT_ATTR(glbl-ack-go-recv-any-rd-req-2, 0x0e),
XGENE_PMU_EVENT_ATTR(wr-req-sent-to-mcu, 0x0f),
XGENE_PMU_EVENT_ATTR(gack-recv, 0x10),
XGENE_PMU_EVENT_ATTR(rd-gack-recv, 0x11),
XGENE_PMU_EVENT_ATTR(wr-gack-recv, 0x12),
XGENE_PMU_EVENT_ATTR(cancel-rd-gack, 0x13),
XGENE_PMU_EVENT_ATTR(cancel-wr-gack, 0x14),
XGENE_PMU_EVENT_ATTR(mcb-csw-req-stall, 0x15),
XGENE_PMU_EVENT_ATTR(mcu-req-intf-blocked, 0x16),
XGENE_PMU_EVENT_ATTR(mcb-mcu-rd-intf-stall, 0x17),
XGENE_PMU_EVENT_ATTR(csw-rd-intf-blocked, 0x18),
XGENE_PMU_EVENT_ATTR(csw-local-ack-intf-blocked, 0x19),
XGENE_PMU_EVENT_ATTR(mcu-req-table-full, 0x1a),
XGENE_PMU_EVENT_ATTR(mcu-stat-table-full, 0x1b),
XGENE_PMU_EVENT_ATTR(mcu-wr-table-full, 0x1c),
XGENE_PMU_EVENT_ATTR(mcu-rdreceipt-resp, 0x1d),
XGENE_PMU_EVENT_ATTR(mcu-wrcomplete-resp, 0x1e),
XGENE_PMU_EVENT_ATTR(mcu-retryack-resp, 0x1f),
XGENE_PMU_EVENT_ATTR(mcu-pcrdgrant-resp, 0x20),
XGENE_PMU_EVENT_ATTR(mcu-req-from-lastload, 0x21),
XGENE_PMU_EVENT_ATTR(mcu-req-from-bypass, 0x22),
XGENE_PMU_EVENT_ATTR(volt-droop-detect, 0x23),
NULL,
};
static struct attribute *mc_pmu_v3_events_attrs[] = {
XGENE_PMU_EVENT_ATTR(cycle-count, 0x00),
XGENE_PMU_EVENT_ATTR(act-sent, 0x01),
XGENE_PMU_EVENT_ATTR(pre-sent, 0x02),
XGENE_PMU_EVENT_ATTR(rd-sent, 0x03),
XGENE_PMU_EVENT_ATTR(rda-sent, 0x04),
XGENE_PMU_EVENT_ATTR(wr-sent, 0x05),
XGENE_PMU_EVENT_ATTR(wra-sent, 0x06),
XGENE_PMU_EVENT_ATTR(pd-entry-vld, 0x07),
XGENE_PMU_EVENT_ATTR(sref-entry-vld, 0x08),
XGENE_PMU_EVENT_ATTR(prea-sent, 0x09),
XGENE_PMU_EVENT_ATTR(ref-sent, 0x0a),
XGENE_PMU_EVENT_ATTR(rd-rda-sent, 0x0b),
XGENE_PMU_EVENT_ATTR(wr-wra-sent, 0x0c),
XGENE_PMU_EVENT_ATTR(raw-hazard, 0x0d),
XGENE_PMU_EVENT_ATTR(war-hazard, 0x0e),
XGENE_PMU_EVENT_ATTR(waw-hazard, 0x0f),
XGENE_PMU_EVENT_ATTR(rar-hazard, 0x10),
XGENE_PMU_EVENT_ATTR(raw-war-waw-hazard, 0x11),
XGENE_PMU_EVENT_ATTR(hprd-lprd-wr-req-vld, 0x12),
XGENE_PMU_EVENT_ATTR(lprd-req-vld, 0x13),
XGENE_PMU_EVENT_ATTR(hprd-req-vld, 0x14),
XGENE_PMU_EVENT_ATTR(hprd-lprd-req-vld, 0x15),
XGENE_PMU_EVENT_ATTR(wr-req-vld, 0x16),
XGENE_PMU_EVENT_ATTR(partial-wr-req-vld, 0x17),
XGENE_PMU_EVENT_ATTR(rd-retry, 0x18),
XGENE_PMU_EVENT_ATTR(wr-retry, 0x19),
XGENE_PMU_EVENT_ATTR(retry-gnt, 0x1a),
XGENE_PMU_EVENT_ATTR(rank-change, 0x1b),
XGENE_PMU_EVENT_ATTR(dir-change, 0x1c),
XGENE_PMU_EVENT_ATTR(rank-dir-change, 0x1d),
XGENE_PMU_EVENT_ATTR(rank-active, 0x1e),
XGENE_PMU_EVENT_ATTR(rank-idle, 0x1f),
XGENE_PMU_EVENT_ATTR(rank-pd, 0x20),
XGENE_PMU_EVENT_ATTR(rank-sref, 0x21),
XGENE_PMU_EVENT_ATTR(queue-fill-gt-thresh, 0x22),
XGENE_PMU_EVENT_ATTR(queue-rds-gt-thresh, 0x23),
XGENE_PMU_EVENT_ATTR(queue-wrs-gt-thresh, 0x24),
XGENE_PMU_EVENT_ATTR(phy-updt-complt, 0x25),
XGENE_PMU_EVENT_ATTR(tz-fail, 0x26),
XGENE_PMU_EVENT_ATTR(dram-errc, 0x27),
XGENE_PMU_EVENT_ATTR(dram-errd, 0x28),
XGENE_PMU_EVENT_ATTR(rd-enq, 0x29),
XGENE_PMU_EVENT_ATTR(wr-enq, 0x2a),
XGENE_PMU_EVENT_ATTR(tmac-limit-reached, 0x2b),
XGENE_PMU_EVENT_ATTR(tmaw-tracker-full, 0x2c),
NULL,
};
static const struct attribute_group l3c_pmu_v3_events_attr_group = {
.name = "events",
.attrs = l3c_pmu_v3_events_attrs,
};
static const struct attribute_group iob_fast_pmu_v3_events_attr_group = {
.name = "events",
.attrs = iob_fast_pmu_v3_events_attrs,
};
static const struct attribute_group iob_slow_pmu_v3_events_attr_group = {
.name = "events",
.attrs = iob_slow_pmu_v3_events_attrs,
};
static const struct attribute_group mcb_pmu_v3_events_attr_group = {
.name = "events",
.attrs = mcb_pmu_v3_events_attrs,
};
static const struct attribute_group mc_pmu_v3_events_attr_group = {
.name = "events",
.attrs = mc_pmu_v3_events_attrs,
};
/*
* sysfs cpumask attributes
*/
static ssize_t cpumask_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct xgene_pmu_dev *pmu_dev = to_pmu_dev(dev_get_drvdata(dev));
return cpumap_print_to_pagebuf(true, buf, &pmu_dev->parent->cpu);
}
static DEVICE_ATTR_RO(cpumask);
static struct attribute *xgene_pmu_cpumask_attrs[] = {
&dev_attr_cpumask.attr,
NULL,
};
static const struct attribute_group pmu_cpumask_attr_group = {
.attrs = xgene_pmu_cpumask_attrs,
};
/*
* Per PMU device attribute groups of PMU v1 and v2
*/
static const struct attribute_group *l3c_pmu_attr_groups[] = {
&l3c_pmu_format_attr_group,
&pmu_cpumask_attr_group,
&l3c_pmu_events_attr_group,
NULL
};
static const struct attribute_group *iob_pmu_attr_groups[] = {
&iob_pmu_format_attr_group,
&pmu_cpumask_attr_group,
&iob_pmu_events_attr_group,
NULL
};
static const struct attribute_group *mcb_pmu_attr_groups[] = {
&mcb_pmu_format_attr_group,
&pmu_cpumask_attr_group,
&mcb_pmu_events_attr_group,
NULL
};
static const struct attribute_group *mc_pmu_attr_groups[] = {
&mc_pmu_format_attr_group,
&pmu_cpumask_attr_group,
&mc_pmu_events_attr_group,
NULL
};
/*
* Per PMU device attribute groups of PMU v3
*/
static const struct attribute_group *l3c_pmu_v3_attr_groups[] = {
&l3c_pmu_v3_format_attr_group,
&pmu_cpumask_attr_group,
&l3c_pmu_v3_events_attr_group,
NULL
};
static const struct attribute_group *iob_fast_pmu_v3_attr_groups[] = {
&iob_pmu_v3_format_attr_group,
&pmu_cpumask_attr_group,
&iob_fast_pmu_v3_events_attr_group,
NULL
};
static const struct attribute_group *iob_slow_pmu_v3_attr_groups[] = {
&iob_slow_pmu_v3_format_attr_group,
&pmu_cpumask_attr_group,
&iob_slow_pmu_v3_events_attr_group,
NULL
};
static const struct attribute_group *mcb_pmu_v3_attr_groups[] = {
&mcb_pmu_v3_format_attr_group,
&pmu_cpumask_attr_group,
&mcb_pmu_v3_events_attr_group,
NULL
};
static const struct attribute_group *mc_pmu_v3_attr_groups[] = {
&mc_pmu_v3_format_attr_group,
&pmu_cpumask_attr_group,
&mc_pmu_v3_events_attr_group,
NULL
};
static int get_next_avail_cntr(struct xgene_pmu_dev *pmu_dev)
{
int cntr;
cntr = find_first_zero_bit(pmu_dev->cntr_assign_mask,
pmu_dev->max_counters);
if (cntr == pmu_dev->max_counters)
return -ENOSPC;
set_bit(cntr, pmu_dev->cntr_assign_mask);
return cntr;
}
static void clear_avail_cntr(struct xgene_pmu_dev *pmu_dev, int cntr)
{
clear_bit(cntr, pmu_dev->cntr_assign_mask);
}
static inline void xgene_pmu_mask_int(struct xgene_pmu *xgene_pmu)
{
writel(PCPPMU_INTENMASK, xgene_pmu->pcppmu_csr + PCPPMU_INTMASK_REG);
}
static inline void xgene_pmu_v3_mask_int(struct xgene_pmu *xgene_pmu)
{
writel(PCPPMU_V3_INTENMASK, xgene_pmu->pcppmu_csr + PCPPMU_INTMASK_REG);
}
static inline void xgene_pmu_unmask_int(struct xgene_pmu *xgene_pmu)
{
writel(PCPPMU_INTCLRMASK, xgene_pmu->pcppmu_csr + PCPPMU_INTMASK_REG);
}
static inline void xgene_pmu_v3_unmask_int(struct xgene_pmu *xgene_pmu)
{
writel(PCPPMU_V3_INTCLRMASK,
xgene_pmu->pcppmu_csr + PCPPMU_INTMASK_REG);
}
static inline u64 xgene_pmu_read_counter32(struct xgene_pmu_dev *pmu_dev,
int idx)
{
return readl(pmu_dev->inf->csr + PMU_PMEVCNTR0 + (4 * idx));
}
static inline u64 xgene_pmu_read_counter64(struct xgene_pmu_dev *pmu_dev,
int idx)
{
u32 lo, hi;
/*
* v3 has 64-bit counter registers composed by 2 32-bit registers
* This can be a problem if the counter increases and carries
* out of bit [31] between 2 reads. The extra reads would help
* to prevent this issue.
*/
do {
hi = xgene_pmu_read_counter32(pmu_dev, 2 * idx + 1);
lo = xgene_pmu_read_counter32(pmu_dev, 2 * idx);
} while (hi != xgene_pmu_read_counter32(pmu_dev, 2 * idx + 1));
return (((u64)hi << 32) | lo);
}
static inline void
xgene_pmu_write_counter32(struct xgene_pmu_dev *pmu_dev, int idx, u64 val)
{
writel(val, pmu_dev->inf->csr + PMU_PMEVCNTR0 + (4 * idx));
}
static inline void
xgene_pmu_write_counter64(struct xgene_pmu_dev *pmu_dev, int idx, u64 val)
{
u32 cnt_lo, cnt_hi;
cnt_hi = upper_32_bits(val);
cnt_lo = lower_32_bits(val);
/* v3 has 64-bit counter registers composed by 2 32-bit registers */
xgene_pmu_write_counter32(pmu_dev, 2 * idx, cnt_lo);
xgene_pmu_write_counter32(pmu_dev, 2 * idx + 1, cnt_hi);
}
static inline void
xgene_pmu_write_evttype(struct xgene_pmu_dev *pmu_dev, int idx, u32 val)
{
writel(val, pmu_dev->inf->csr + PMU_PMEVTYPER0 + (4 * idx));
}
static inline void
xgene_pmu_write_agentmsk(struct xgene_pmu_dev *pmu_dev, u32 val)
{
writel(val, pmu_dev->inf->csr + PMU_PMAMR0);
}
static inline void
xgene_pmu_v3_write_agentmsk(struct xgene_pmu_dev *pmu_dev, u32 val) { }
static inline void
xgene_pmu_write_agent1msk(struct xgene_pmu_dev *pmu_dev, u32 val)
{
writel(val, pmu_dev->inf->csr + PMU_PMAMR1);
}
static inline void
xgene_pmu_v3_write_agent1msk(struct xgene_pmu_dev *pmu_dev, u32 val) { }
static inline void
xgene_pmu_enable_counter(struct xgene_pmu_dev *pmu_dev, int idx)
{
u32 val;
val = readl(pmu_dev->inf->csr + PMU_PMCNTENSET);
val |= 1 << idx;
writel(val, pmu_dev->inf->csr + PMU_PMCNTENSET);
}
static inline void
xgene_pmu_disable_counter(struct xgene_pmu_dev *pmu_dev, int idx)
{
u32 val;
val = readl(pmu_dev->inf->csr + PMU_PMCNTENCLR);
val |= 1 << idx;
writel(val, pmu_dev->inf->csr + PMU_PMCNTENCLR);
}
static inline void
xgene_pmu_enable_counter_int(struct xgene_pmu_dev *pmu_dev, int idx)
{
u32 val;
val = readl(pmu_dev->inf->csr + PMU_PMINTENSET);
val |= 1 << idx;
writel(val, pmu_dev->inf->csr + PMU_PMINTENSET);
}
static inline void
xgene_pmu_disable_counter_int(struct xgene_pmu_dev *pmu_dev, int idx)
{
u32 val;
val = readl(pmu_dev->inf->csr + PMU_PMINTENCLR);
val |= 1 << idx;
writel(val, pmu_dev->inf->csr + PMU_PMINTENCLR);
}
static inline void xgene_pmu_reset_counters(struct xgene_pmu_dev *pmu_dev)
{
u32 val;
val = readl(pmu_dev->inf->csr + PMU_PMCR);
val |= PMU_PMCR_P;
writel(val, pmu_dev->inf->csr + PMU_PMCR);
}
static inline void xgene_pmu_start_counters(struct xgene_pmu_dev *pmu_dev)
{
u32 val;
val = readl(pmu_dev->inf->csr + PMU_PMCR);
val |= PMU_PMCR_E;
writel(val, pmu_dev->inf->csr + PMU_PMCR);
}
static inline void xgene_pmu_stop_counters(struct xgene_pmu_dev *pmu_dev)
{
u32 val;
val = readl(pmu_dev->inf->csr + PMU_PMCR);
val &= ~PMU_PMCR_E;
writel(val, pmu_dev->inf->csr + PMU_PMCR);
}
static void xgene_perf_pmu_enable(struct pmu *pmu)
{
struct xgene_pmu_dev *pmu_dev = to_pmu_dev(pmu);
struct xgene_pmu *xgene_pmu = pmu_dev->parent;
bool enabled = !bitmap_empty(pmu_dev->cntr_assign_mask,
pmu_dev->max_counters);
if (!enabled)
return;
xgene_pmu->ops->start_counters(pmu_dev);
}
static void xgene_perf_pmu_disable(struct pmu *pmu)
{
struct xgene_pmu_dev *pmu_dev = to_pmu_dev(pmu);
struct xgene_pmu *xgene_pmu = pmu_dev->parent;
xgene_pmu->ops->stop_counters(pmu_dev);
}
static int xgene_perf_event_init(struct perf_event *event)
{
struct xgene_pmu_dev *pmu_dev = to_pmu_dev(event->pmu);
struct hw_perf_event *hw = &event->hw;
struct perf_event *sibling;
/* 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;
/*
* Many perf core operations (eg. events rotation) operate on a
* single CPU context. This is obvious for CPU PMUs, where one
* expects the same sets of events being observed on all CPUs,
* but can lead to issues for off-core PMUs, where each
* event could be theoretically assigned to a different CPU. To
* mitigate this, we enforce CPU assignment to one, selected
* processor (the one described in the "cpumask" attribute).
*/
event->cpu = cpumask_first(&pmu_dev->parent->cpu);
hw->config = event->attr.config;
/*
* Each bit of the config1 field represents an agent from which the
* request of the event come. The event is counted only if it's caused
* by a request of an agent has the bit cleared.
* By default, the event is counted for all agents.
*/
hw->config_base = event->attr.config1;
/*
* We must NOT create groups containing mixed PMUs, although software
* events are acceptable
*/
if (event->group_leader->pmu != event->pmu &&
!is_software_event(event->group_leader))
return -EINVAL;
for_each_sibling_event(sibling, event->group_leader) {
if (sibling->pmu != event->pmu &&
!is_software_event(sibling))
return -EINVAL;
}
return 0;
}
static void xgene_perf_enable_event(struct perf_event *event)
{
struct xgene_pmu_dev *pmu_dev = to_pmu_dev(event->pmu);
struct xgene_pmu *xgene_pmu = pmu_dev->parent;
xgene_pmu->ops->write_evttype(pmu_dev, GET_CNTR(event),
GET_EVENTID(event));
xgene_pmu->ops->write_agentmsk(pmu_dev, ~((u32)GET_AGENTID(event)));
if (pmu_dev->inf->type == PMU_TYPE_IOB)
xgene_pmu->ops->write_agent1msk(pmu_dev,
~((u32)GET_AGENT1ID(event)));
xgene_pmu->ops->enable_counter(pmu_dev, GET_CNTR(event));
xgene_pmu->ops->enable_counter_int(pmu_dev, GET_CNTR(event));
}
static void xgene_perf_disable_event(struct perf_event *event)
{
struct xgene_pmu_dev *pmu_dev = to_pmu_dev(event->pmu);
struct xgene_pmu *xgene_pmu = pmu_dev->parent;
xgene_pmu->ops->disable_counter(pmu_dev, GET_CNTR(event));
xgene_pmu->ops->disable_counter_int(pmu_dev, GET_CNTR(event));
}
static void xgene_perf_event_set_period(struct perf_event *event)
{
struct xgene_pmu_dev *pmu_dev = to_pmu_dev(event->pmu);
struct xgene_pmu *xgene_pmu = pmu_dev->parent;
struct hw_perf_event *hw = &event->hw;
/*
* For 32 bit counter, it has a period of 2^32. To account for the
* possibility of extreme interrupt latency we program for a period of
* half that. Hopefully, we can handle the interrupt before another 2^31
* events occur and the counter overtakes its previous value.
* For 64 bit counter, we don't expect it overflow.
*/
u64 val = 1ULL << 31;
local64_set(&hw->prev_count, val);
xgene_pmu->ops->write_counter(pmu_dev, hw->idx, val);
}
static void xgene_perf_event_update(struct perf_event *event)
{
struct xgene_pmu_dev *pmu_dev = to_pmu_dev(event->pmu);
struct xgene_pmu *xgene_pmu = pmu_dev->parent;
struct hw_perf_event *hw = &event->hw;
u64 delta, prev_raw_count, new_raw_count;
again:
prev_raw_count = local64_read(&hw->prev_count);
new_raw_count = xgene_pmu->ops->read_counter(pmu_dev, GET_CNTR(event));
if (local64_cmpxchg(&hw->prev_count, prev_raw_count,
new_raw_count) != prev_raw_count)
goto again;
delta = (new_raw_count - prev_raw_count) & pmu_dev->max_period;
local64_add(delta, &event->count);
}
static void xgene_perf_read(struct perf_event *event)
{
xgene_perf_event_update(event);
}
static void xgene_perf_start(struct perf_event *event, int flags)
{
struct xgene_pmu_dev *pmu_dev = to_pmu_dev(event->pmu);
struct xgene_pmu *xgene_pmu = pmu_dev->parent;
struct hw_perf_event *hw = &event->hw;
if (WARN_ON_ONCE(!(hw->state & PERF_HES_STOPPED)))
return;
WARN_ON_ONCE(!(hw->state & PERF_HES_UPTODATE));
hw->state = 0;
xgene_perf_event_set_period(event);
if (flags & PERF_EF_RELOAD) {
u64 prev_raw_count = local64_read(&hw->prev_count);
xgene_pmu->ops->write_counter(pmu_dev, GET_CNTR(event),
prev_raw_count);
}
xgene_perf_enable_event(event);
perf_event_update_userpage(event);
}
static void xgene_perf_stop(struct perf_event *event, int flags)
{
struct hw_perf_event *hw = &event->hw;
if (hw->state & PERF_HES_UPTODATE)
return;
xgene_perf_disable_event(event);
WARN_ON_ONCE(hw->state & PERF_HES_STOPPED);
hw->state |= PERF_HES_STOPPED;
if (hw->state & PERF_HES_UPTODATE)
return;
xgene_perf_read(event);
hw->state |= PERF_HES_UPTODATE;
}
static int xgene_perf_add(struct perf_event *event, int flags)
{
struct xgene_pmu_dev *pmu_dev = to_pmu_dev(event->pmu);
struct hw_perf_event *hw = &event->hw;
hw->state = PERF_HES_UPTODATE | PERF_HES_STOPPED;
/* Allocate an event counter */
hw->idx = get_next_avail_cntr(pmu_dev);
if (hw->idx < 0)
return -EAGAIN;
/* Update counter event pointer for Interrupt handler */
pmu_dev->pmu_counter_event[hw->idx] = event;
if (flags & PERF_EF_START)
xgene_perf_start(event, PERF_EF_RELOAD);
return 0;
}
static void xgene_perf_del(struct perf_event *event, int flags)
{
struct xgene_pmu_dev *pmu_dev = to_pmu_dev(event->pmu);
struct hw_perf_event *hw = &event->hw;
xgene_perf_stop(event, PERF_EF_UPDATE);
/* clear the assigned counter */
clear_avail_cntr(pmu_dev, GET_CNTR(event));
perf_event_update_userpage(event);
pmu_dev->pmu_counter_event[hw->idx] = NULL;
}
static int xgene_init_perf(struct xgene_pmu_dev *pmu_dev, char *name)
{
struct xgene_pmu *xgene_pmu;
if (pmu_dev->parent->version == PCP_PMU_V3)
pmu_dev->max_period = PMU_V3_CNT_MAX_PERIOD;
else
pmu_dev->max_period = PMU_CNT_MAX_PERIOD;
/* First version PMU supports only single event counter */
xgene_pmu = pmu_dev->parent;
if (xgene_pmu->version == PCP_PMU_V1)
pmu_dev->max_counters = 1;
else
pmu_dev->max_counters = PMU_MAX_COUNTERS;
/* Perf driver registration */
pmu_dev->pmu = (struct pmu) {
.attr_groups = pmu_dev->attr_groups,
.task_ctx_nr = perf_invalid_context,
.pmu_enable = xgene_perf_pmu_enable,
.pmu_disable = xgene_perf_pmu_disable,
.event_init = xgene_perf_event_init,
.add = xgene_perf_add,
.del = xgene_perf_del,
.start = xgene_perf_start,
.stop = xgene_perf_stop,
.read = xgene_perf_read,
.capabilities = PERF_PMU_CAP_NO_EXCLUDE,
};
/* Hardware counter init */
xgene_pmu->ops->stop_counters(pmu_dev);
xgene_pmu->ops->reset_counters(pmu_dev);
return perf_pmu_register(&pmu_dev->pmu, name, -1);
}
static int
xgene_pmu_dev_add(struct xgene_pmu *xgene_pmu, struct xgene_pmu_dev_ctx *ctx)
{
struct device *dev = xgene_pmu->dev;
struct xgene_pmu_dev *pmu;
pmu = devm_kzalloc(dev, sizeof(*pmu), GFP_KERNEL);
if (!pmu)
return -ENOMEM;
pmu->parent = xgene_pmu;
pmu->inf = &ctx->inf;
ctx->pmu_dev = pmu;
switch (pmu->inf->type) {
case PMU_TYPE_L3C:
if (!(xgene_pmu->l3c_active_mask & pmu->inf->enable_mask))
return -ENODEV;
if (xgene_pmu->version == PCP_PMU_V3)
pmu->attr_groups = l3c_pmu_v3_attr_groups;
else
pmu->attr_groups = l3c_pmu_attr_groups;
break;
case PMU_TYPE_IOB:
if (xgene_pmu->version == PCP_PMU_V3)
pmu->attr_groups = iob_fast_pmu_v3_attr_groups;
else
pmu->attr_groups = iob_pmu_attr_groups;
break;
case PMU_TYPE_IOB_SLOW:
if (xgene_pmu->version == PCP_PMU_V3)
pmu->attr_groups = iob_slow_pmu_v3_attr_groups;
break;
case PMU_TYPE_MCB:
if (!(xgene_pmu->mcb_active_mask & pmu->inf->enable_mask))
return -ENODEV;
if (xgene_pmu->version == PCP_PMU_V3)
pmu->attr_groups = mcb_pmu_v3_attr_groups;
else
pmu->attr_groups = mcb_pmu_attr_groups;
break;
case PMU_TYPE_MC:
if (!(xgene_pmu->mc_active_mask & pmu->inf->enable_mask))
return -ENODEV;
if (xgene_pmu->version == PCP_PMU_V3)
pmu->attr_groups = mc_pmu_v3_attr_groups;
else
pmu->attr_groups = mc_pmu_attr_groups;
break;
default:
return -EINVAL;
}
if (xgene_init_perf(pmu, ctx->name)) {
dev_err(dev, "%s PMU: Failed to init perf driver\n", ctx->name);
return -ENODEV;
}
dev_info(dev, "%s PMU registered\n", ctx->name);
return 0;
}
static void _xgene_pmu_isr(int irq, struct xgene_pmu_dev *pmu_dev)
{
struct xgene_pmu *xgene_pmu = pmu_dev->parent;
void __iomem *csr = pmu_dev->inf->csr;
u32 pmovsr;
int idx;
xgene_pmu->ops->stop_counters(pmu_dev);
if (xgene_pmu->version == PCP_PMU_V3)
pmovsr = readl(csr + PMU_PMOVSSET) & PMU_OVERFLOW_MASK;
else
pmovsr = readl(csr + PMU_PMOVSR) & PMU_OVERFLOW_MASK;
if (!pmovsr)
goto out;
/* Clear interrupt flag */
if (xgene_pmu->version == PCP_PMU_V1)
writel(0x0, csr + PMU_PMOVSR);
else if (xgene_pmu->version == PCP_PMU_V2)
writel(pmovsr, csr + PMU_PMOVSR);
else
writel(pmovsr, csr + PMU_PMOVSCLR);
for (idx = 0; idx < PMU_MAX_COUNTERS; idx++) {
struct perf_event *event = pmu_dev->pmu_counter_event[idx];
int overflowed = pmovsr & BIT(idx);
/* Ignore if we don't have an event. */
if (!event || !overflowed)
continue;
xgene_perf_event_update(event);
xgene_perf_event_set_period(event);
}
out:
xgene_pmu->ops->start_counters(pmu_dev);
}
static irqreturn_t xgene_pmu_isr(int irq, void *dev_id)
{
u32 intr_mcu, intr_mcb, intr_l3c, intr_iob;
struct xgene_pmu_dev_ctx *ctx;
struct xgene_pmu *xgene_pmu = dev_id;
u32 val;
raw_spin_lock(&xgene_pmu->lock);
/* Get Interrupt PMU source */
val = readl(xgene_pmu->pcppmu_csr + PCPPMU_INTSTATUS_REG);
if (xgene_pmu->version == PCP_PMU_V3) {
intr_mcu = PCPPMU_V3_INT_MCU;
intr_mcb = PCPPMU_V3_INT_MCB;
intr_l3c = PCPPMU_V3_INT_L3C;
intr_iob = PCPPMU_V3_INT_IOB;
} else {
intr_mcu = PCPPMU_INT_MCU;
intr_mcb = PCPPMU_INT_MCB;
intr_l3c = PCPPMU_INT_L3C;
intr_iob = PCPPMU_INT_IOB;
}
if (val & intr_mcu) {
list_for_each_entry(ctx, &xgene_pmu->mcpmus, next) {
_xgene_pmu_isr(irq, ctx->pmu_dev);
}
}
if (val & intr_mcb) {
list_for_each_entry(ctx, &xgene_pmu->mcbpmus, next) {
_xgene_pmu_isr(irq, ctx->pmu_dev);
}
}
if (val & intr_l3c) {
list_for_each_entry(ctx, &xgene_pmu->l3cpmus, next) {
_xgene_pmu_isr(irq, ctx->pmu_dev);
}
}
if (val & intr_iob) {
list_for_each_entry(ctx, &xgene_pmu->iobpmus, next) {
_xgene_pmu_isr(irq, ctx->pmu_dev);
}
}
raw_spin_unlock(&xgene_pmu->lock);
return IRQ_HANDLED;
}
static int acpi_pmu_probe_active_mcb_mcu_l3c(struct xgene_pmu *xgene_pmu,
struct platform_device *pdev)
{
void __iomem *csw_csr, *mcba_csr, *mcbb_csr;
unsigned int reg;
csw_csr = devm_platform_ioremap_resource(pdev, 1);
if (IS_ERR(csw_csr)) {
dev_err(&pdev->dev, "ioremap failed for CSW CSR resource\n");
return PTR_ERR(csw_csr);
}
mcba_csr = devm_platform_ioremap_resource(pdev, 2);
if (IS_ERR(mcba_csr)) {
dev_err(&pdev->dev, "ioremap failed for MCBA CSR resource\n");
return PTR_ERR(mcba_csr);
}
mcbb_csr = devm_platform_ioremap_resource(pdev, 3);
if (IS_ERR(mcbb_csr)) {
dev_err(&pdev->dev, "ioremap failed for MCBB CSR resource\n");
return PTR_ERR(mcbb_csr);
}
xgene_pmu->l3c_active_mask = 0x1;
reg = readl(csw_csr + CSW_CSWCR);
if (reg & CSW_CSWCR_DUALMCB_MASK) {
/* Dual MCB active */
xgene_pmu->mcb_active_mask = 0x3;
/* Probe all active MC(s) */
reg = readl(mcbb_csr + CSW_CSWCR);
xgene_pmu->mc_active_mask =
(reg & MCBADDRMR_DUALMCU_MODE_MASK) ? 0xF : 0x5;
} else {
/* Single MCB active */
xgene_pmu->mcb_active_mask = 0x1;
/* Probe all active MC(s) */
reg = readl(mcba_csr + CSW_CSWCR);
xgene_pmu->mc_active_mask =
(reg & MCBADDRMR_DUALMCU_MODE_MASK) ? 0x3 : 0x1;
}
return 0;
}
static int acpi_pmu_v3_probe_active_mcb_mcu_l3c(struct xgene_pmu *xgene_pmu,
struct platform_device *pdev)
{
void __iomem *csw_csr;
unsigned int reg;
u32 mcb0routing;
u32 mcb1routing;
csw_csr = devm_platform_ioremap_resource(pdev, 1);
if (IS_ERR(csw_csr)) {
dev_err(&pdev->dev, "ioremap failed for CSW CSR resource\n");
return PTR_ERR(csw_csr);
}
reg = readl(csw_csr + CSW_CSWCR);
mcb0routing = CSW_CSWCR_MCB0_ROUTING(reg);
mcb1routing = CSW_CSWCR_MCB1_ROUTING(reg);
if (reg & CSW_CSWCR_DUALMCB_MASK) {
/* Dual MCB active */
xgene_pmu->mcb_active_mask = 0x3;
/* Probe all active L3C(s), maximum is 8 */
xgene_pmu->l3c_active_mask = 0xFF;
/* Probe all active MC(s), maximum is 8 */
if ((mcb0routing == 0x2) && (mcb1routing == 0x2))
xgene_pmu->mc_active_mask = 0xFF;
else if ((mcb0routing == 0x1) && (mcb1routing == 0x1))
xgene_pmu->mc_active_mask = 0x33;
else
xgene_pmu->mc_active_mask = 0x11;
} else {
/* Single MCB active */
xgene_pmu->mcb_active_mask = 0x1;
/* Probe all active L3C(s), maximum is 4 */
xgene_pmu->l3c_active_mask = 0x0F;
/* Probe all active MC(s), maximum is 4 */
if (mcb0routing == 0x2)
xgene_pmu->mc_active_mask = 0x0F;
else if (mcb0routing == 0x1)
xgene_pmu->mc_active_mask = 0x03;
else
xgene_pmu->mc_active_mask = 0x01;
}
return 0;
}
static int fdt_pmu_probe_active_mcb_mcu_l3c(struct xgene_pmu *xgene_pmu,
struct platform_device *pdev)
{
struct regmap *csw_map, *mcba_map, *mcbb_map;
struct device_node *np = pdev->dev.of_node;
unsigned int reg;
csw_map = syscon_regmap_lookup_by_phandle(np, "regmap-csw");
if (IS_ERR(csw_map)) {
dev_err(&pdev->dev, "unable to get syscon regmap csw\n");
return PTR_ERR(csw_map);
}
mcba_map = syscon_regmap_lookup_by_phandle(np, "regmap-mcba");
if (IS_ERR(mcba_map)) {
dev_err(&pdev->dev, "unable to get syscon regmap mcba\n");
return PTR_ERR(mcba_map);
}
mcbb_map = syscon_regmap_lookup_by_phandle(np, "regmap-mcbb");
if (IS_ERR(mcbb_map)) {
dev_err(&pdev->dev, "unable to get syscon regmap mcbb\n");
return PTR_ERR(mcbb_map);
}
xgene_pmu->l3c_active_mask = 0x1;
if (regmap_read(csw_map, CSW_CSWCR, &reg))
return -EINVAL;
if (reg & CSW_CSWCR_DUALMCB_MASK) {
/* Dual MCB active */
xgene_pmu->mcb_active_mask = 0x3;
/* Probe all active MC(s) */
if (regmap_read(mcbb_map, MCBADDRMR, &reg))
return 0;
xgene_pmu->mc_active_mask =
(reg & MCBADDRMR_DUALMCU_MODE_MASK) ? 0xF : 0x5;
} else {
/* Single MCB active */
xgene_pmu->mcb_active_mask = 0x1;
/* Probe all active MC(s) */
if (regmap_read(mcba_map, MCBADDRMR, &reg))
return 0;
xgene_pmu->mc_active_mask =
(reg & MCBADDRMR_DUALMCU_MODE_MASK) ? 0x3 : 0x1;
}
return 0;
}
static int xgene_pmu_probe_active_mcb_mcu_l3c(struct xgene_pmu *xgene_pmu,
struct platform_device *pdev)
{
if (has_acpi_companion(&pdev->dev)) {
if (xgene_pmu->version == PCP_PMU_V3)
return acpi_pmu_v3_probe_active_mcb_mcu_l3c(xgene_pmu,
pdev);
else
return acpi_pmu_probe_active_mcb_mcu_l3c(xgene_pmu,
pdev);
}
return fdt_pmu_probe_active_mcb_mcu_l3c(xgene_pmu, pdev);
}
static char *xgene_pmu_dev_name(struct device *dev, u32 type, int id)
{
switch (type) {
case PMU_TYPE_L3C:
return devm_kasprintf(dev, GFP_KERNEL, "l3c%d", id);
case PMU_TYPE_IOB:
return devm_kasprintf(dev, GFP_KERNEL, "iob%d", id);
case PMU_TYPE_IOB_SLOW:
return devm_kasprintf(dev, GFP_KERNEL, "iob_slow%d", id);
case PMU_TYPE_MCB:
return devm_kasprintf(dev, GFP_KERNEL, "mcb%d", id);
case PMU_TYPE_MC:
return devm_kasprintf(dev, GFP_KERNEL, "mc%d", id);
default:
return devm_kasprintf(dev, GFP_KERNEL, "unknown");
}
}
#if defined(CONFIG_ACPI)
static struct
xgene_pmu_dev_ctx *acpi_get_pmu_hw_inf(struct xgene_pmu *xgene_pmu,
struct acpi_device *adev, u32 type)
{
struct device *dev = xgene_pmu->dev;
struct list_head resource_list;
struct xgene_pmu_dev_ctx *ctx;
const union acpi_object *obj;
struct hw_pmu_info *inf;
void __iomem *dev_csr;
struct resource res;
struct resource_entry *rentry;
int enable_bit;
int rc;
ctx = devm_kzalloc(dev, sizeof(*ctx), GFP_KERNEL);
if (!ctx)
return NULL;
INIT_LIST_HEAD(&resource_list);
rc = acpi_dev_get_resources(adev, &resource_list, NULL, NULL);
if (rc <= 0) {
dev_err(dev, "PMU type %d: No resources found\n", type);
return NULL;
}
list_for_each_entry(rentry, &resource_list, node) {
if (resource_type(rentry->res) == IORESOURCE_MEM) {
res = *rentry->res;
rentry = NULL;
break;
}
}
acpi_dev_free_resource_list(&resource_list);
if (rentry) {
dev_err(dev, "PMU type %d: No memory resource found\n", type);
return NULL;
}
dev_csr = devm_ioremap_resource(dev, &res);
if (IS_ERR(dev_csr)) {
dev_err(dev, "PMU type %d: Fail to map resource\n", type);
return NULL;
}
/* A PMU device node without enable-bit-index is always enabled */
rc = acpi_dev_get_property(adev, "enable-bit-index",
ACPI_TYPE_INTEGER, &obj);
if (rc < 0)
enable_bit = 0;
else
enable_bit = (int) obj->integer.value;
ctx->name = xgene_pmu_dev_name(dev, type, enable_bit);
if (!ctx->name) {
dev_err(dev, "PMU type %d: Fail to get device name\n", type);
return NULL;
}
inf = &ctx->inf;
inf->type = type;
inf->csr = dev_csr;
inf->enable_mask = 1 << enable_bit;
return ctx;
}
static const struct acpi_device_id xgene_pmu_acpi_type_match[] = {
{"APMC0D5D", PMU_TYPE_L3C},
{"APMC0D5E", PMU_TYPE_IOB},
{"APMC0D5F", PMU_TYPE_MCB},
{"APMC0D60", PMU_TYPE_MC},
{"APMC0D84", PMU_TYPE_L3C},
{"APMC0D85", PMU_TYPE_IOB},
{"APMC0D86", PMU_TYPE_IOB_SLOW},
{"APMC0D87", PMU_TYPE_MCB},
{"APMC0D88", PMU_TYPE_MC},
{},
};
static const struct acpi_device_id *xgene_pmu_acpi_match_type(
const struct acpi_device_id *ids,
struct acpi_device *adev)
{
const struct acpi_device_id *match_id = NULL;
const struct acpi_device_id *id;
for (id = ids; id->id[0] || id->cls; id++) {
if (!acpi_match_device_ids(adev, id))
match_id = id;
else if (match_id)
break;
}
return match_id;
}
static acpi_status acpi_pmu_dev_add(acpi_handle handle, u32 level,
void *data, void **return_value)
{
struct acpi_device *adev = acpi_fetch_acpi_dev(handle);
const struct acpi_device_id *acpi_id;
struct xgene_pmu *xgene_pmu = data;
struct xgene_pmu_dev_ctx *ctx;
if (!adev || acpi_bus_get_status(adev) || !adev->status.present)
return AE_OK;
acpi_id = xgene_pmu_acpi_match_type(xgene_pmu_acpi_type_match, adev);
if (!acpi_id)
return AE_OK;
ctx = acpi_get_pmu_hw_inf(xgene_pmu, adev, (u32)acpi_id->driver_data);
if (!ctx)
return AE_OK;
if (xgene_pmu_dev_add(xgene_pmu, ctx)) {
/* Can't add the PMU device, skip it */
devm_kfree(xgene_pmu->dev, ctx);
return AE_OK;
}
switch (ctx->inf.type) {
case PMU_TYPE_L3C:
list_add(&ctx->next, &xgene_pmu->l3cpmus);
break;
case PMU_TYPE_IOB:
list_add(&ctx->next, &xgene_pmu->iobpmus);
break;
case PMU_TYPE_IOB_SLOW:
list_add(&ctx->next, &xgene_pmu->iobpmus);
break;
case PMU_TYPE_MCB:
list_add(&ctx->next, &xgene_pmu->mcbpmus);
break;
case PMU_TYPE_MC:
list_add(&ctx->next, &xgene_pmu->mcpmus);
break;
}
return AE_OK;
}
static int acpi_pmu_probe_pmu_dev(struct xgene_pmu *xgene_pmu,
struct platform_device *pdev)
{
struct device *dev = xgene_pmu->dev;
acpi_handle handle;
acpi_status status;
handle = ACPI_HANDLE(dev);
if (!handle)
return -EINVAL;
status = acpi_walk_namespace(ACPI_TYPE_DEVICE, handle, 1,
acpi_pmu_dev_add, NULL, xgene_pmu, NULL);
if (ACPI_FAILURE(status)) {
dev_err(dev, "failed to probe PMU devices\n");
return -ENODEV;
}
return 0;
}
#else
static int acpi_pmu_probe_pmu_dev(struct xgene_pmu *xgene_pmu,
struct platform_device *pdev)
{
return 0;
}
#endif
static struct
xgene_pmu_dev_ctx *fdt_get_pmu_hw_inf(struct xgene_pmu *xgene_pmu,
struct device_node *np, u32 type)
{
struct device *dev = xgene_pmu->dev;
struct xgene_pmu_dev_ctx *ctx;
struct hw_pmu_info *inf;
void __iomem *dev_csr;
struct resource res;
int enable_bit;
ctx = devm_kzalloc(dev, sizeof(*ctx), GFP_KERNEL);
if (!ctx)
return NULL;
if (of_address_to_resource(np, 0, &res) < 0) {
dev_err(dev, "PMU type %d: No resource address found\n", type);
return NULL;
}
dev_csr = devm_ioremap_resource(dev, &res);
if (IS_ERR(dev_csr)) {
dev_err(dev, "PMU type %d: Fail to map resource\n", type);
return NULL;
}
/* A PMU device node without enable-bit-index is always enabled */
if (of_property_read_u32(np, "enable-bit-index", &enable_bit))
enable_bit = 0;
ctx->name = xgene_pmu_dev_name(dev, type, enable_bit);
if (!ctx->name) {
dev_err(dev, "PMU type %d: Fail to get device name\n", type);
return NULL;
}
inf = &ctx->inf;
inf->type = type;
inf->csr = dev_csr;
inf->enable_mask = 1 << enable_bit;
return ctx;
}
static int fdt_pmu_probe_pmu_dev(struct xgene_pmu *xgene_pmu,
struct platform_device *pdev)
{
struct xgene_pmu_dev_ctx *ctx;
struct device_node *np;
for_each_child_of_node(pdev->dev.of_node, np) {
if (!of_device_is_available(np))
continue;
if (of_device_is_compatible(np, "apm,xgene-pmu-l3c"))
ctx = fdt_get_pmu_hw_inf(xgene_pmu, np, PMU_TYPE_L3C);
else if (of_device_is_compatible(np, "apm,xgene-pmu-iob"))
ctx = fdt_get_pmu_hw_inf(xgene_pmu, np, PMU_TYPE_IOB);
else if (of_device_is_compatible(np, "apm,xgene-pmu-mcb"))
ctx = fdt_get_pmu_hw_inf(xgene_pmu, np, PMU_TYPE_MCB);
else if (of_device_is_compatible(np, "apm,xgene-pmu-mc"))
ctx = fdt_get_pmu_hw_inf(xgene_pmu, np, PMU_TYPE_MC);
else
ctx = NULL;
if (!ctx)
continue;
if (xgene_pmu_dev_add(xgene_pmu, ctx)) {
/* Can't add the PMU device, skip it */
devm_kfree(xgene_pmu->dev, ctx);
continue;
}
switch (ctx->inf.type) {
case PMU_TYPE_L3C:
list_add(&ctx->next, &xgene_pmu->l3cpmus);
break;
case PMU_TYPE_IOB:
list_add(&ctx->next, &xgene_pmu->iobpmus);
break;
case PMU_TYPE_IOB_SLOW:
list_add(&ctx->next, &xgene_pmu->iobpmus);
break;
case PMU_TYPE_MCB:
list_add(&ctx->next, &xgene_pmu->mcbpmus);
break;
case PMU_TYPE_MC:
list_add(&ctx->next, &xgene_pmu->mcpmus);
break;
}
}
return 0;
}
static int xgene_pmu_probe_pmu_dev(struct xgene_pmu *xgene_pmu,
struct platform_device *pdev)
{
if (has_acpi_companion(&pdev->dev))
return acpi_pmu_probe_pmu_dev(xgene_pmu, pdev);
return fdt_pmu_probe_pmu_dev(xgene_pmu, pdev);
}
static const struct xgene_pmu_data xgene_pmu_data = {
.id = PCP_PMU_V1,
};
static const struct xgene_pmu_data xgene_pmu_v2_data = {
.id = PCP_PMU_V2,
};
#ifdef CONFIG_ACPI
static const struct xgene_pmu_data xgene_pmu_v3_data = {
.id = PCP_PMU_V3,
};
#endif
static const struct xgene_pmu_ops xgene_pmu_ops = {
.mask_int = xgene_pmu_mask_int,
.unmask_int = xgene_pmu_unmask_int,
.read_counter = xgene_pmu_read_counter32,
.write_counter = xgene_pmu_write_counter32,
.write_evttype = xgene_pmu_write_evttype,
.write_agentmsk = xgene_pmu_write_agentmsk,
.write_agent1msk = xgene_pmu_write_agent1msk,
.enable_counter = xgene_pmu_enable_counter,
.disable_counter = xgene_pmu_disable_counter,
.enable_counter_int = xgene_pmu_enable_counter_int,
.disable_counter_int = xgene_pmu_disable_counter_int,
.reset_counters = xgene_pmu_reset_counters,
.start_counters = xgene_pmu_start_counters,
.stop_counters = xgene_pmu_stop_counters,
};
static const struct xgene_pmu_ops xgene_pmu_v3_ops = {
.mask_int = xgene_pmu_v3_mask_int,
.unmask_int = xgene_pmu_v3_unmask_int,
.read_counter = xgene_pmu_read_counter64,
.write_counter = xgene_pmu_write_counter64,
.write_evttype = xgene_pmu_write_evttype,
.write_agentmsk = xgene_pmu_v3_write_agentmsk,
.write_agent1msk = xgene_pmu_v3_write_agent1msk,
.enable_counter = xgene_pmu_enable_counter,
.disable_counter = xgene_pmu_disable_counter,
.enable_counter_int = xgene_pmu_enable_counter_int,
.disable_counter_int = xgene_pmu_disable_counter_int,
.reset_counters = xgene_pmu_reset_counters,
.start_counters = xgene_pmu_start_counters,
.stop_counters = xgene_pmu_stop_counters,
};
static const struct of_device_id xgene_pmu_of_match[] = {
{ .compatible = "apm,xgene-pmu", .data = &xgene_pmu_data },
{ .compatible = "apm,xgene-pmu-v2", .data = &xgene_pmu_v2_data },
{},
};
MODULE_DEVICE_TABLE(of, xgene_pmu_of_match);
#ifdef CONFIG_ACPI
static const struct acpi_device_id xgene_pmu_acpi_match[] = {
{"APMC0D5B", (kernel_ulong_t)&xgene_pmu_data},
{"APMC0D5C", (kernel_ulong_t)&xgene_pmu_v2_data},
{"APMC0D83", (kernel_ulong_t)&xgene_pmu_v3_data},
{},
};
MODULE_DEVICE_TABLE(acpi, xgene_pmu_acpi_match);
#endif
static int xgene_pmu_online_cpu(unsigned int cpu, struct hlist_node *node)
{
struct xgene_pmu *xgene_pmu = hlist_entry_safe(node, struct xgene_pmu,
node);
if (cpumask_empty(&xgene_pmu->cpu))
cpumask_set_cpu(cpu, &xgene_pmu->cpu);
/* Overflow interrupt also should use the same CPU */
WARN_ON(irq_set_affinity(xgene_pmu->irq, &xgene_pmu->cpu));
return 0;
}
static int xgene_pmu_offline_cpu(unsigned int cpu, struct hlist_node *node)
{
struct xgene_pmu *xgene_pmu = hlist_entry_safe(node, struct xgene_pmu,
node);
struct xgene_pmu_dev_ctx *ctx;
unsigned int target;
if (!cpumask_test_and_clear_cpu(cpu, &xgene_pmu->cpu))
return 0;
target = cpumask_any_but(cpu_online_mask, cpu);
if (target >= nr_cpu_ids)
return 0;
list_for_each_entry(ctx, &xgene_pmu->mcpmus, next) {
perf_pmu_migrate_context(&ctx->pmu_dev->pmu, cpu, target);
}
list_for_each_entry(ctx, &xgene_pmu->mcbpmus, next) {
perf_pmu_migrate_context(&ctx->pmu_dev->pmu, cpu, target);
}
list_for_each_entry(ctx, &xgene_pmu->l3cpmus, next) {
perf_pmu_migrate_context(&ctx->pmu_dev->pmu, cpu, target);
}
list_for_each_entry(ctx, &xgene_pmu->iobpmus, next) {
perf_pmu_migrate_context(&ctx->pmu_dev->pmu, cpu, target);
}
cpumask_set_cpu(target, &xgene_pmu->cpu);
/* Overflow interrupt also should use the same CPU */
WARN_ON(irq_set_affinity(xgene_pmu->irq, &xgene_pmu->cpu));
return 0;
}
static int xgene_pmu_probe(struct platform_device *pdev)
{
const struct xgene_pmu_data *dev_data;
struct xgene_pmu *xgene_pmu;
int irq, rc;
int version;
/* Install a hook to update the reader CPU in case it goes offline */
rc = cpuhp_setup_state_multi(CPUHP_AP_PERF_ARM_APM_XGENE_ONLINE,
"CPUHP_AP_PERF_ARM_APM_XGENE_ONLINE",
xgene_pmu_online_cpu,
xgene_pmu_offline_cpu);
if (rc)
return rc;
xgene_pmu = devm_kzalloc(&pdev->dev, sizeof(*xgene_pmu), GFP_KERNEL);
if (!xgene_pmu)
return -ENOMEM;
xgene_pmu->dev = &pdev->dev;
platform_set_drvdata(pdev, xgene_pmu);
dev_data = device_get_match_data(&pdev->dev);
if (!dev_data)
return -ENODEV;
version = dev_data->id;
if (version == PCP_PMU_V3)
xgene_pmu->ops = &xgene_pmu_v3_ops;
else
xgene_pmu->ops = &xgene_pmu_ops;
INIT_LIST_HEAD(&xgene_pmu->l3cpmus);
INIT_LIST_HEAD(&xgene_pmu->iobpmus);
INIT_LIST_HEAD(&xgene_pmu->mcbpmus);
INIT_LIST_HEAD(&xgene_pmu->mcpmus);
xgene_pmu->version = version;
dev_info(&pdev->dev, "X-Gene PMU version %d\n", xgene_pmu->version);
xgene_pmu->pcppmu_csr = devm_platform_ioremap_resource(pdev, 0);
if (IS_ERR(xgene_pmu->pcppmu_csr)) {
dev_err(&pdev->dev, "ioremap failed for PCP PMU resource\n");
return PTR_ERR(xgene_pmu->pcppmu_csr);
}
irq = platform_get_irq(pdev, 0);
if (irq < 0)
return -EINVAL;
rc = devm_request_irq(&pdev->dev, irq, xgene_pmu_isr,
IRQF_NOBALANCING | IRQF_NO_THREAD,
dev_name(&pdev->dev), xgene_pmu);
if (rc) {
dev_err(&pdev->dev, "Could not request IRQ %d\n", irq);
return rc;
}
xgene_pmu->irq = irq;
raw_spin_lock_init(&xgene_pmu->lock);
/* Check for active MCBs and MCUs */
rc = xgene_pmu_probe_active_mcb_mcu_l3c(xgene_pmu, pdev);
if (rc) {
dev_warn(&pdev->dev, "Unknown MCB/MCU active status\n");
xgene_pmu->mcb_active_mask = 0x1;
xgene_pmu->mc_active_mask = 0x1;
}
/* Add this instance to the list used by the hotplug callback */
rc = cpuhp_state_add_instance(CPUHP_AP_PERF_ARM_APM_XGENE_ONLINE,
&xgene_pmu->node);
if (rc) {
dev_err(&pdev->dev, "Error %d registering hotplug", rc);
return rc;
}
/* Walk through the tree for all PMU perf devices */
rc = xgene_pmu_probe_pmu_dev(xgene_pmu, pdev);
if (rc) {
dev_err(&pdev->dev, "No PMU perf devices found!\n");
goto out_unregister;
}
/* Enable interrupt */
xgene_pmu->ops->unmask_int(xgene_pmu);
return 0;
out_unregister:
cpuhp_state_remove_instance(CPUHP_AP_PERF_ARM_APM_XGENE_ONLINE,
&xgene_pmu->node);
return rc;
}
static void
xgene_pmu_dev_cleanup(struct xgene_pmu *xgene_pmu, struct list_head *pmus)
{
struct xgene_pmu_dev_ctx *ctx;
list_for_each_entry(ctx, pmus, next) {
perf_pmu_unregister(&ctx->pmu_dev->pmu);
}
}
static void xgene_pmu_remove(struct platform_device *pdev)
{
struct xgene_pmu *xgene_pmu = dev_get_drvdata(&pdev->dev);
xgene_pmu_dev_cleanup(xgene_pmu, &xgene_pmu->l3cpmus);
xgene_pmu_dev_cleanup(xgene_pmu, &xgene_pmu->iobpmus);
xgene_pmu_dev_cleanup(xgene_pmu, &xgene_pmu->mcbpmus);
xgene_pmu_dev_cleanup(xgene_pmu, &xgene_pmu->mcpmus);
cpuhp_state_remove_instance(CPUHP_AP_PERF_ARM_APM_XGENE_ONLINE,
&xgene_pmu->node);
}
static struct platform_driver xgene_pmu_driver = {
.probe = xgene_pmu_probe,
.remove_new = xgene_pmu_remove,
.driver = {
.name = "xgene-pmu",
.of_match_table = xgene_pmu_of_match,
.acpi_match_table = ACPI_PTR(xgene_pmu_acpi_match),
.suppress_bind_attrs = true,
},
};
builtin_platform_driver(xgene_pmu_driver);
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