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linux/drivers/perf/xgene_pmu.c
Hoan Tran cbb72a3c19 drivers/perf: xgene: Add CPU hotplug support 
If the CPU assigned to the xgene PMU is taken offline, then subsequent
perf invocations on the PMU will fail:

  # echo 0 > /sys/devices/system/cpu/cpu0/online
  # perf stat -a -e l3c0/cycle-count/,l3c0/write/ sleep 1
    Error:
    The sys_perf_event_open() syscall returned with 19 (No such device) for event (l3c0/cycle-count/).
    /bin/dmesg may provide additional information.
    No CONFIG_PERF_EVENTS=y kernel support configured?

This patch implements a hotplug notifier in the xgene PMU driver so that
the PMU context is migrated to another online CPU should its assigned
CPU disappear.

Acked-by: Mark Rutland <mark.rutland@arm.com>
Signed-off-by: Hoan Tran <hoan.tran@amperecomputing.com>
[will: Made naming of new cpuhp_state enum entry consistent]
Signed-off-by: Will Deacon <will.deacon@arm.com>
2018-11-21 16:28:00 +00:00

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/*
* 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>
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; either version 2 of the License, or (at your
* option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#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/of_fdt.h>
#include <linux/of_irq.h>
#include <linux/of_platform.h>
#include <linux/perf_event.h>
#include <linux/platform_device.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 sprintf(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 dev_ext_attribute *eattr;
eattr = container_of(attr, struct dev_ext_attribute, attr);
return sprintf(buf, "config=0x%lx\n", (unsigned long) eattr->var);
}
#define XGENE_PMU_EVENT_ATTR(_name, _config) \
(&((struct dev_ext_attribute[]) { \
{ .attr = __ATTR(_name, S_IRUGO, xgene_pmu_event_show, NULL), \
.var = (void *) _config, } \
})[0].attr.attr)
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 xgene_pmu_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(cpumask, S_IRUGO, xgene_pmu_cpumask_show, NULL);
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;
int enabled = bitmap_weight(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;
/* SOC counters do not have usr/os/guest/host bits */
if (event->attr.exclude_user || event->attr.exclude_kernel ||
event->attr.exclude_host || event->attr.exclude_guest)
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;
u64 config;
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;
config = hw->config;
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,
};
/* 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;
unsigned long flags;
u32 val;
raw_spin_lock_irqsave(&xgene_pmu->lock, flags);
/* 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_irqrestore(&xgene_pmu->lock, flags);
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;
struct resource *res;
unsigned int reg;
res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
csw_csr = devm_ioremap_resource(&pdev->dev, res);
if (IS_ERR(csw_csr)) {
dev_err(&pdev->dev, "ioremap failed for CSW CSR resource\n");
return PTR_ERR(csw_csr);
}
res = platform_get_resource(pdev, IORESOURCE_MEM, 2);
mcba_csr = devm_ioremap_resource(&pdev->dev, res);
if (IS_ERR(mcba_csr)) {
dev_err(&pdev->dev, "ioremap failed for MCBA CSR resource\n");
return PTR_ERR(mcba_csr);
}
res = platform_get_resource(pdev, IORESOURCE_MEM, 3);
mcbb_csr = devm_ioremap_resource(&pdev->dev, res);
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;
struct resource *res;
unsigned int reg;
u32 mcb0routing;
u32 mcb1routing;
res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
csw_csr = devm_ioremap_resource(&pdev->dev, res);
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 int acpi_pmu_dev_add_resource(struct acpi_resource *ares, void *data)
{
struct resource *res = data;
if (ares->type == ACPI_RESOURCE_TYPE_FIXED_MEMORY32)
acpi_dev_resource_memory(ares, res);
/* Always tell the ACPI core to skip this resource */
return 1;
}
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;
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,
acpi_pmu_dev_add_resource, &res);
acpi_dev_free_resource_list(&resource_list);
if (rc < 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 */
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)
{
const struct acpi_device_id *acpi_id;
struct xgene_pmu *xgene_pmu = data;
struct xgene_pmu_dev_ctx *ctx;
struct acpi_device *adev;
if (acpi_bus_get_device(handle, &adev))
return AE_OK;
if (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,
};
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", PCP_PMU_V1},
{"APMC0D5C", PCP_PMU_V2},
{"APMC0D83", PCP_PMU_V3},
{},
};
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;
const struct of_device_id *of_id;
struct xgene_pmu *xgene_pmu;
struct resource *res;
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);
version = -EINVAL;
of_id = of_match_device(xgene_pmu_of_match, &pdev->dev);
if (of_id) {
dev_data = (const struct xgene_pmu_data *) of_id->data;
version = dev_data->id;
}
#ifdef CONFIG_ACPI
if (ACPI_COMPANION(&pdev->dev)) {
const struct acpi_device_id *acpi_id;
acpi_id = acpi_match_device(xgene_pmu_acpi_match, &pdev->dev);
if (acpi_id)
version = (int) acpi_id->driver_data;
}
#endif
if (version < 0)
return -ENODEV;
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);
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
xgene_pmu->pcppmu_csr = devm_ioremap_resource(&pdev->dev, res);
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) {
dev_err(&pdev->dev, "No IRQ resource\n");
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 int 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);
return 0;
}
static struct platform_driver xgene_pmu_driver = {
.probe = xgene_pmu_probe,
.remove = xgene_pmu_remove,
.driver = {
.name = "xgene-pmu",
.of_match_table = xgene_pmu_of_match,
.acpi_match_table = ACPI_PTR(xgene_pmu_acpi_match),
},
};
builtin_platform_driver(xgene_pmu_driver);
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