Re: [PATCH v7 3/4] perf: xgene: Add APM X-Gene SoC Performance Monitoring Unit driver

From: Tai Tri Nguyen
Date: Mon Jul 11 2016 - 12:47:16 EST

Hi Mark,

On Mon, Jul 11, 2016 at 4:39 AM, Mark Rutland <mark.rutland@xxxxxxx> wrote:
> Please add some commit messge text, e.g.
>
> This patch adds a driver for the SoC-wide (AKA uncore) PMU hardware
> found in APM X-Gene SoCs.
>
> On Wed, Jul 06, 2016 at 05:07:24PM -0700, Tai Nguyen wrote:
>> Signed-off-by: Tai Nguyen <ttnguyen@xxxxxxx>
>
> Modulo that, and Paul's comments:
>
> Reviewed-by: Mark Rutland <mark.rutland@xxxxxxx>

Thanks a lot. I'll fix it.

Regards,
Tai

[...]
>
> Thanks,
> Mark.
>
>> ---
>> Documentation/perf/xgene-pmu.txt | 48 ++
>> drivers/perf/Kconfig | 7 +
>> drivers/perf/Makefile | 1 +
>> drivers/perf/xgene_pmu.c | 1398 ++++++++++++++++++++++++++++++++++++++
>> 4 files changed, 1454 insertions(+)
>> create mode 100644 Documentation/perf/xgene-pmu.txt
>> create mode 100644 drivers/perf/xgene_pmu.c
>>
>> diff --git a/Documentation/perf/xgene-pmu.txt b/Documentation/perf/xgene-pmu.txt
>> new file mode 100644
>> index 0000000..d7cff44
>> --- /dev/null
>> +++ b/Documentation/perf/xgene-pmu.txt
>> @@ -0,0 +1,48 @@
>> +APM X-Gene SoC Performance Monitoring Unit (PMU)
>> +================================================
>> +
>> +X-Gene SoC PMU consists of various independent system device PMUs such as
>> +L3 cache(s), I/O bridge(s), memory controller bridge(s) and memory
>> +controller(s). These PMU devices are loosely architected to follow the
>> +same model as the PMU for ARM cores. The PMUs share the same top level
>> +interrupt and status CSR region.
>> +
>> +PMU (perf) driver
>> +-----------------
>> +
>> +The xgene-pmu driver registers several perf PMU drivers. Each of the perf
>> +driver provides description of its available events and configuration options
>> +in sysfs, see /sys/devices/<l3cX/iobX/mcbX/mcX>/.
>> +
>> +The "format" directory describes format of the config (event ID),
>> +config1 (agent ID) fields of the perf_event_attr structure. The "events"
>> +directory provides configuration templates for all supported event types that
>> +can be used with perf tool. For example, "l3c0/bank-fifo-full/" is an
>> +equivalent of "l3c0/config=0x0b/".
>> +
>> +Most of the SoC PMU has a specific list of agent ID used for monitoring
>> +performance of a specific datapath. For example, agents of a L3 cache can be
>> +a specific CPU or an I/O bridge. Each PMU has a set of 2 registers capable of
>> +masking the agents from which the request come from. If the bit with
>> +the bit number corresponding to the agent is set, the event is counted only if
>> +it is caused by a request from that agent. Each agent ID bit is inversely mapped
>> +to a corresponding bit in "config1" field. By default, the event will be
>> +counted for all agent requests (config1 = 0x0). For all the supported agents of
>> +each PMU, please refer to APM X-Gene User Manual.
>> +
>> +Each perf driver also provides a "cpumask" sysfs attribute, which contains a
>> +single CPU ID of the processor which will be used to handle all the PMU events.
>> +
>> +Example for perf tool use:
>> +
>> + / # perf list | grep -e l3c -e iob -e mcb -e mc
>> + l3c0/ackq-full/ [Kernel PMU event]
>> + <...>
>> + mcb1/mcb-csw-stall/ [Kernel PMU event]
>> +
>> + / # perf stat -a -e l3c0/read-miss/,mcb1/csw-write-request/ sleep 1
>> +
>> + / # perf stat -a -e l3c0/read-miss,config1=0xfffffffffffffffe/ sleep 1
>> +
>> +The driver does not support sampling, therefore "perf record" will
>> +not work. Per-task (without "-a") perf sessions are not supported.
>> diff --git a/drivers/perf/Kconfig b/drivers/perf/Kconfig
>> index 04e2653..4d5c5f9 100644
>> --- a/drivers/perf/Kconfig
>> +++ b/drivers/perf/Kconfig
>> @@ -12,4 +12,11 @@ config ARM_PMU
>> Say y if you want to use CPU performance monitors on ARM-based
>> systems.
>>
>> +config XGENE_PMU
>> + depends on PERF_EVENTS && ARCH_XGENE
>> + bool "APM X-Gene SoC PMU"
>> + default n
>> + help
>> + Say y if you want to use APM X-Gene SoC performance monitors.
>> +
>> endmenu
>> diff --git a/drivers/perf/Makefile b/drivers/perf/Makefile
>> index acd2397..b116e98 100644
>> --- a/drivers/perf/Makefile
>> +++ b/drivers/perf/Makefile
>> @@ -1 +1,2 @@
>> obj-$(CONFIG_ARM_PMU) += arm_pmu.o
>> +obj-$(CONFIG_XGENE_PMU) += xgene_pmu.o
>> diff --git a/drivers/perf/xgene_pmu.c b/drivers/perf/xgene_pmu.c
>> new file mode 100644
>> index 0000000..907a6cc
>> --- /dev/null
>> +++ b/drivers/perf/xgene_pmu.c
>> @@ -0,0 +1,1398 @@
>> +/*
>> + * APM X-Gene SoC PMU (Performance Monitor Unit)
>> + *
>> + * Copyright (c) 2016, Applied Micro Circuits Corporation
>> + * Author: Hoan Tran <hotran@xxxxxxx>
>> + * Tai Nguyen <ttnguyen@xxxxxxx>
>> + *
>> + * 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/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 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 PMU_MAX_COUNTERS 4
>> +#define PMU_CNT_MAX_PERIOD 0x100000000ULL
>> +#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
>> +
>> +#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 {
>> + struct device *dev;
>> + int version;
>> + void __iomem *pcppmu_csr;
>> + u32 mcb_active_mask;
>> + u32 mc_active_mask;
>> + cpumask_t cpu;
>> + raw_spinlock_t lock;
>> + 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,
>> +};
>> +
>> +enum xgene_pmu_dev_type {
>> + PMU_TYPE_L3C = 0,
>> + PMU_TYPE_IOB,
>> + 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,
>> +};
>> +
>> +/*
>> + * 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,
>> +};
>> +
>> +/*
>> + * 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
>> + */
>> +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
>> +};
>> +
>> +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_unmask_int(struct xgene_pmu *xgene_pmu)
>> +{
>> + writel(PCPPMU_INTCLRMASK, xgene_pmu->pcppmu_csr + PCPPMU_INTMASK_REG);
>> +}
>> +
>> +static inline u32 xgene_pmu_read_counter(struct xgene_pmu_dev *pmu_dev, int idx)
>> +{
>> + return readl(pmu_dev->inf->csr + PMU_PMEVCNTR0 + (4 * idx));
>> +}
>> +
>> +static inline void
>> +xgene_pmu_write_counter(struct xgene_pmu_dev *pmu_dev, int idx, u32 val)
>> +{
>> + writel(val, pmu_dev->inf->csr + PMU_PMEVCNTR0 + (4 * idx));
>> +}
>> +
>> +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_write_agent1msk(struct xgene_pmu_dev *pmu_dev, u32 val)
>> +{
>> + writel(val, pmu_dev->inf->csr + PMU_PMAMR1);
>> +}
>> +
>> +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);
>> + int enabled = bitmap_weight(pmu_dev->cntr_assign_mask,
>> + pmu_dev->max_counters);
>> +
>> + if (!enabled)
>> + return;
>> +
>> + xgene_pmu_start_counters(pmu_dev);
>> +}
>> +
>> +static void xgene_perf_pmu_disable(struct pmu *pmu)
>> +{
>> + struct xgene_pmu_dev *pmu_dev = to_pmu_dev(pmu);
>> +
>> + xgene_pmu_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;
>> +
>> + list_for_each_entry(sibling, &event->group_leader->sibling_list,
>> + group_entry)
>> + 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);
>> +
>> + xgene_pmu_write_evttype(pmu_dev, GET_CNTR(event), GET_EVENTID(event));
>> + xgene_pmu_write_agentmsk(pmu_dev, ~((u32)GET_AGENTID(event)));
>> + if (pmu_dev->inf->type == PMU_TYPE_IOB)
>> + xgene_pmu_write_agent1msk(pmu_dev, ~((u32)GET_AGENT1ID(event)));
>> +
>> + xgene_pmu_enable_counter(pmu_dev, GET_CNTR(event));
>> + xgene_pmu_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);
>> +
>> + xgene_pmu_disable_counter(pmu_dev, GET_CNTR(event));
>> + xgene_pmu_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 hw_perf_event *hw = &event->hw;
>> + /*
>> + * The X-Gene PMU counters have a period of 2^32. To account for the
>> + * possiblity 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.
>> + */
>> + u64 val = 1ULL << 31;
>> +
>> + local64_set(&hw->prev_count, val);
>> + xgene_pmu_write_counter(pmu_dev, hw->idx, (u32) val);
>> +}
>> +
>> +static void xgene_perf_event_update(struct perf_event *event)
>> +{
>> + struct xgene_pmu_dev *pmu_dev = to_pmu_dev(event->pmu);
>> + 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_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 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_write_counter(pmu_dev, GET_CNTR(event),
>> + (u32) 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;
>> +
>> + pmu_dev->max_period = PMU_CNT_MAX_PERIOD - 1;
>> + /* 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_stop_counters(pmu_dev);
>> + xgene_pmu_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;
>> + int rc;
>> +
>> + 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:
>> + pmu->attr_groups = l3c_pmu_attr_groups;
>> + break;
>> + case PMU_TYPE_IOB:
>> + pmu->attr_groups = iob_pmu_attr_groups;
>> + break;
>> + case PMU_TYPE_MCB:
>> + if (!(xgene_pmu->mcb_active_mask & pmu->inf->enable_mask))
>> + goto dev_err;
>> + pmu->attr_groups = mcb_pmu_attr_groups;
>> + break;
>> + case PMU_TYPE_MC:
>> + if (!(xgene_pmu->mc_active_mask & pmu->inf->enable_mask))
>> + goto dev_err;
>> + pmu->attr_groups = mc_pmu_attr_groups;
>> + break;
>> + default:
>> + return -EINVAL;
>> + }
>> +
>> + rc = xgene_init_perf(pmu, ctx->name);
>> + if (rc) {
>> + dev_err(dev, "%s PMU: Failed to init perf driver\n", ctx->name);
>> + goto dev_err;
>> + }
>> +
>> + dev_info(dev, "%s PMU registered\n", ctx->name);
>> +
>> + return rc;
>> +
>> +dev_err:
>> + devm_kfree(dev, pmu);
>> + return -ENODEV;
>> +}
>> +
>> +static void _xgene_pmu_isr(int irq, struct xgene_pmu_dev *pmu_dev)
>> +{
>> + struct xgene_pmu *xgene_pmu = pmu_dev->parent;
>> + u32 pmovsr;
>> + int idx;
>> +
>> + pmovsr = readl(pmu_dev->inf->csr + PMU_PMOVSR) & PMU_OVERFLOW_MASK;
>> + if (!pmovsr)
>> + return;
>> +
>> + /* Clear interrupt flag */
>> + if (xgene_pmu->version == PCP_PMU_V1)
>> + writel(0x0, pmu_dev->inf->csr + PMU_PMOVSR);
>> + else
>> + writel(pmovsr, pmu_dev->inf->csr + PMU_PMOVSR);
>> +
>> + 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);
>> + }
>> +}
>> +
>> +static irqreturn_t xgene_pmu_isr(int irq, void *dev_id)
>> +{
>> + 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 (val & PCPPMU_INT_MCU) {
>> + list_for_each_entry(ctx, &xgene_pmu->mcpmus, next) {
>> + _xgene_pmu_isr(irq, ctx->pmu_dev);
>> + }
>> + }
>> + if (val & PCPPMU_INT_MCB) {
>> + list_for_each_entry(ctx, &xgene_pmu->mcbpmus, next) {
>> + _xgene_pmu_isr(irq, ctx->pmu_dev);
>> + }
>> + }
>> + if (val & PCPPMU_INT_L3C) {
>> + list_for_each_entry(ctx, &xgene_pmu->l3cpmus, next) {
>> + _xgene_pmu_isr(irq, ctx->pmu_dev);
>> + }
>> + }
>> + if (val & PCPPMU_INT_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(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);
>> + }
>> +
>> + 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 fdt_pmu_probe_active_mcb_mcu(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);
>> + }
>> +
>> + 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(struct xgene_pmu *xgene_pmu,
>> + struct platform_device *pdev)
>> +{
>> + if (has_acpi_companion(&pdev->dev))
>> + return acpi_pmu_probe_active_mcb_mcu(xgene_pmu, pdev);
>> + return fdt_pmu_probe_active_mcb_mcu(xgene_pmu, pdev);
>> +}
>> +
>> +static char *xgene_pmu_dev_name(u32 type, int id)
>> +{
>> + switch (type) {
>> + case PMU_TYPE_L3C:
>> + return kasprintf(GFP_KERNEL, "l3c%d", id);
>> + case PMU_TYPE_IOB:
>> + return kasprintf(GFP_KERNEL, "iob%d", id);
>> + case PMU_TYPE_MCB:
>> + return kasprintf(GFP_KERNEL, "mcb%d", id);
>> + case PMU_TYPE_MC:
>> + return kasprintf(GFP_KERNEL, "mc%d", id);
>> + default:
>> + return kasprintf(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 || IS_ERR(&res)) {
>> + dev_err(dev, "PMU type %d: No resource address found\n", type);
>> + goto err;
>> + }
>> +
>> + dev_csr = devm_ioremap_resource(dev, &res);
>> + if (IS_ERR(dev_csr)) {
>> + dev_err(dev, "PMU type %d: Fail to map resource\n", type);
>> + rc = PTR_ERR(dev_csr);
>> + goto err;
>> + }
>> +
>> + /* 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(type, enable_bit);
>> + inf = &ctx->inf;
>> + inf->type = type;
>> + inf->csr = dev_csr;
>> + inf->enable_mask = 1 << enable_bit;
>> +
>> + return ctx;
>> +err:
>> + devm_kfree(dev, ctx);
>> + return NULL;
>> +}
>> +
>> +static acpi_status acpi_pmu_dev_add(acpi_handle handle, u32 level,
>> + void *data, void **return_value)
>> +{
>> + 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;
>> +
>> + if (!strcmp(acpi_device_hid(adev), "APMC0D5D"))
>> + ctx = acpi_get_pmu_hw_inf(xgene_pmu, adev, PMU_TYPE_L3C);
>> + else if (!strcmp(acpi_device_hid(adev), "APMC0D5E"))
>> + ctx = acpi_get_pmu_hw_inf(xgene_pmu, adev, PMU_TYPE_IOB);
>> + else if (!strcmp(acpi_device_hid(adev), "APMC0D5F"))
>> + ctx = acpi_get_pmu_hw_inf(xgene_pmu, adev, PMU_TYPE_MCB);
>> + else if (!strcmp(acpi_device_hid(adev), "APMC0D60"))
>> + ctx = acpi_get_pmu_hw_inf(xgene_pmu, adev, PMU_TYPE_MC);
>> + else
>> + ctx = NULL;
>> +
>> + 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_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;
>> + int rc;
>> +
>> + ctx = devm_kzalloc(dev, sizeof(*ctx), GFP_KERNEL);
>> + if (!ctx)
>> + return NULL;
>> + rc = of_address_to_resource(np, 0, &res);
>> + if (rc < 0) {
>> + dev_err(dev, "PMU type %d: No resource address found\n", type);
>> + goto err;
>> + }
>> + dev_csr = devm_ioremap_resource(dev, &res);
>> + if (IS_ERR(dev_csr)) {
>> + dev_err(dev, "PMU type %d: Fail to map resource\n", type);
>> + rc = PTR_ERR(dev_csr);
>> + goto err;
>> + }
>> +
>> + /* 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(type, enable_bit);
>> + inf = &ctx->inf;
>> + inf->type = type;
>> + inf->csr = dev_csr;
>> + inf->enable_mask = 1 << enable_bit;
>> +
>> + return ctx;
>> +err:
>> + devm_kfree(dev, ctx);
>> + return NULL;
>> +}
>> +
>> +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_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 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},
>> + {},
>> +};
>> +MODULE_DEVICE_TABLE(acpi, xgene_pmu_acpi_match);
>> +#endif
>> +
>> +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;
>> +
>> + 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;
>> +
>> + 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");
>> + rc = PTR_ERR(xgene_pmu->pcppmu_csr);
>> + goto err;
>> + }
>> +
>> + irq = platform_get_irq(pdev, 0);
>> + if (irq < 0) {
>> + dev_err(&pdev->dev, "No IRQ resource\n");
>> + rc = -EINVAL;
>> + goto err;
>> + }
>> + 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);
>> + goto err;
>> + }
>> +
>> + raw_spin_lock_init(&xgene_pmu->lock);
>> +
>> + /* Check for active MCBs and MCUs */
>> + rc = xgene_pmu_probe_active_mcb_mcu(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;
>> + }
>> +
>> + /* Pick one core to use for cpumask attributes */
>> + cpumask_set_cpu(smp_processor_id(), &xgene_pmu->cpu);
>> +
>> + /* Make sure that the overflow interrupt is handled by this CPU */
>> + rc = irq_set_affinity(irq, &xgene_pmu->cpu);
>> + if (rc) {
>> + dev_err(&pdev->dev, "Failed to set interrupt affinity!\n");
>> + goto err;
>> + }
>> +
>> + /* 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 err;
>> + }
>> +
>> + /* Enable interrupt */
>> + xgene_pmu_unmask_int(xgene_pmu);
>> +
>> + return 0;
>> +
>> +err:
>> + if (xgene_pmu->pcppmu_csr)
>> + devm_iounmap(&pdev->dev, xgene_pmu->pcppmu_csr);
>> + devm_kfree(&pdev->dev, xgene_pmu);
>> +
>> + return rc;
>> +}
>> +
>> +static void
>> +xgene_pmu_dev_cleanup(struct xgene_pmu *xgene_pmu, struct list_head *pmus)
>> +{
>> + struct xgene_pmu_dev_ctx *ctx;
>> + struct device *dev = xgene_pmu->dev;
>> + struct xgene_pmu_dev *pmu_dev;
>> +
>> + list_for_each_entry(ctx, pmus, next) {
>> + pmu_dev = ctx->pmu_dev;
>> + if (pmu_dev->inf->csr)
>> + devm_iounmap(dev, pmu_dev->inf->csr);
>> + devm_kfree(dev, ctx);
>> + devm_kfree(dev, pmu_dev);
>> + }
>> +}
>> +
>> +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);
>> +
>> + if (xgene_pmu->pcppmu_csr)
>> + devm_iounmap(&pdev->dev, xgene_pmu->pcppmu_csr);
>> + devm_kfree(&pdev->dev, xgene_pmu);
>> +
>> + 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),
>> + },
>> +};
>> +
>> +module_platform_driver(xgene_pmu_driver);
>> +
>> +MODULE_DESCRIPTION("APM X-Gene SoC PMU driver");
>> +MODULE_AUTHOR("Hoan Tran <hotran@xxxxxxx>");
>> +MODULE_AUTHOR("Tai Nguyen <ttnguyen@xxxxxxx>");
>> +MODULE_LICENSE("GPL");
>> --
>> 1.9.1
>>



--
Tai