Message-ID: <53d143fc-ce68-0d0b-1186-c8a5d87af0c5@huawei.com>
Date:   Thu, 25 May 2023 21:39:32 +0800
From:   Yicong Yang <yangyicong@...wei.com>
To:     Junhao He <hejunhao3@...wei.com>, <will@...nel.org>,
        <jonathan.cameron@...wei.com>, <linux-kernel@...r.kernel.org>,
        <mark.rutland@....com>
CC:     <yangyicong@...ilicon.com>, <linux-arm-kernel@...ts.infradead.org>,
        <linux-doc@...r.kernel.org>, <linuxarm@...wei.com>,
        <shenyang39@...wei.com>, <prime.zeng@...ilicon.com>
Subject: Re: [PATCH 2/3] drivers/perf: hisi: Add support for HiSilicon UC PMU
 driver

Hi Junhao,

On 2023/5/23 21:18, Junhao He wrote:
> On HiSilicon Hip09 platform, there is a UC (unified cache) module
> on each chip SCCL (Super CPU Cluster). UC is a cache that provides
> coherence between NUMA and UMA domains. It is located between L2
> and Memory System. While PA uncore PMU model is the same as other
> Hip09 PMU modules and many PMU events are supported. Let's support
> the PMU driver using the HiSilicon uncore PMU framework.
> 
> * rd_req_en : rd_req_en is the abbreviation of read request tracetag enable
> and allows user to count only read operations.
> details are listed in the hisi-pmu document.
> 
> * srcid_en & srcid: allows user to filter statistics that come from
> specific CPU/ICL by configuration source ID.
> 
> * uring_channel: Allows users to filter statistical information based on
> the specified tx request uring channel.
> uring_channel only supported events: [0x47 ~ 0x59].
> 

Just a quick glance and some minor comments below.

> Signed-off-by: Junhao He <hejunhao3@...wei.com>
> ---
>  drivers/perf/hisilicon/Makefile             |   2 +-
>  drivers/perf/hisilicon/hisi_uncore_pmu.c    |   5 +-
>  drivers/perf/hisilicon/hisi_uncore_pmu.h    |   6 +
>  drivers/perf/hisilicon/hisi_uncore_uc_pmu.c | 581 ++++++++++++++++++++
>  4 files changed, 592 insertions(+), 2 deletions(-)
>  create mode 100644 drivers/perf/hisilicon/hisi_uncore_uc_pmu.c
> 
> diff --git a/drivers/perf/hisilicon/Makefile b/drivers/perf/hisilicon/Makefile
> index 4d2c9abe3372..48dcc8381ea7 100644
> --- a/drivers/perf/hisilicon/Makefile
> +++ b/drivers/perf/hisilicon/Makefile
> @@ -1,7 +1,7 @@
>  # SPDX-License-Identifier: GPL-2.0-only
>  obj-$(CONFIG_HISI_PMU) += hisi_uncore_pmu.o hisi_uncore_l3c_pmu.o \
>  			  hisi_uncore_hha_pmu.o hisi_uncore_ddrc_pmu.o hisi_uncore_sllc_pmu.o \
> -			  hisi_uncore_pa_pmu.o hisi_uncore_cpa_pmu.o
> +			  hisi_uncore_pa_pmu.o hisi_uncore_cpa_pmu.o hisi_uncore_uc_pmu.o
>  
>  obj-$(CONFIG_HISI_PCIE_PMU) += hisi_pcie_pmu.o
>  obj-$(CONFIG_HNS3_PMU) += hns3_pmu.o
> diff --git a/drivers/perf/hisilicon/hisi_uncore_pmu.c b/drivers/perf/hisilicon/hisi_uncore_pmu.c
> index 2823f381930d..c5ac1c1a9fc1 100644
> --- a/drivers/perf/hisilicon/hisi_uncore_pmu.c
> +++ b/drivers/perf/hisilicon/hisi_uncore_pmu.c
> @@ -20,7 +20,6 @@
>  
>  #include "hisi_uncore_pmu.h"
>  
> -#define HISI_GET_EVENTID(ev) (ev->hw.config_base & 0xff)
>  #define HISI_MAX_PERIOD(nr) (GENMASK_ULL((nr) - 1, 0))
>  
>  /*
> @@ -226,6 +225,10 @@ int hisi_uncore_pmu_event_init(struct perf_event *event)
>  	hwc->idx		= -1;
>  	hwc->config_base	= event->attr.config;
>  
> +	if (hisi_pmu->ops->check_format)
> +		if (hisi_pmu->ops->check_format(event))

It can be merged into one if.

> +			return -EINVAL;
> +
>  	/* Enforce to use the same CPU for all events in this PMU */
>  	event->cpu = hisi_pmu->on_cpu;
>  
> diff --git a/drivers/perf/hisilicon/hisi_uncore_pmu.h b/drivers/perf/hisilicon/hisi_uncore_pmu.h
> index 73574cc0a243..af6529e99c13 100644
> --- a/drivers/perf/hisilicon/hisi_uncore_pmu.h
> +++ b/drivers/perf/hisilicon/hisi_uncore_pmu.h
> @@ -49,9 +49,15 @@ enum hisi_pmu_version {
>  	HISI_PMU_MAX
>  };
>  
> +#define HISI_GET_EVENTID(ev) (ev->hw.config_base & 0xff)
> +
> +#define HISI_PMU_EVTYPE_BITS		8
> +#define HISI_PMU_EVTYPE_SHIFT(idx)	((idx) % 4 * HISI_PMU_EVTYPE_BITS)
> +
>  struct hisi_pmu;
>  
>  struct hisi_uncore_ops {
> +	int (*check_format)(struct perf_event *event);
>  	void (*write_evtype)(struct hisi_pmu *, int, u32);
>  	int (*get_event_idx)(struct perf_event *);
>  	u64 (*read_counter)(struct hisi_pmu *, struct hw_perf_event *);
> diff --git a/drivers/perf/hisilicon/hisi_uncore_uc_pmu.c b/drivers/perf/hisilicon/hisi_uncore_uc_pmu.c
> new file mode 100644
> index 000000000000..385966eab816
> --- /dev/null
> +++ b/drivers/perf/hisilicon/hisi_uncore_uc_pmu.c
> @@ -0,0 +1,581 @@
> +// SPDX-License-Identifier: GPL-2.0-only
> +/*
> + * HiSilicon SoC UC (unified cache) uncore Hardware event counters support
> + *
> + * Copyright (C) 2023 HiSilicon Limited
> + *
> + * This code is based on the uncore PMUs like hisi_uncore_l3c_pmu.
> + */
> +#include <linux/cpuhotplug.h>
> +#include <linux/interrupt.h>
> +#include <linux/irq.h>
> +#include <linux/list.h>
> +#include <linux/mod_devicetable.h>
> +#include <linux/property.h>
> +
> +#include "hisi_uncore_pmu.h"
> +
> +/* Dynamic CPU hotplug state used by UC PMU */
> +static enum cpuhp_state hisi_uc_pmu_online;
> +
> +/* UC register definition */
> +#define HISI_UC_INT_MASK_REG		0x0800
> +#define HISI_UC_INT_STS_REG		0x0808
> +#define HISI_UC_INT_CLEAR_REG		0x080c
> +#define HISI_UC_TRACETAG_CTRL_REG	0x1b2c
> +#define HISI_UC_TRACETAG_REQ_MSK	GENMASK(9, 7)
> +#define HISI_UC_TRACETAG_MARK_EN	BIT(0)
> +#define HISI_UC_TRACETAG_REQ_EN		(HISI_UC_TRACETAG_MARK_EN | BIT(2))
> +#define HISI_UC_TRACETAG_SRCID_EN	BIT(3)
> +#define HISI_UC_SRCID_CTRL_REG		0x1b40
> +#define HISI_UC_SRCID_MSK		GENMASK(14, 1)
> +#define HISI_UC_EVENT_CTRL_REG		0x1c00
> +#define HISI_UC_EVENT_TRACETAG_EN	BIT(29)
> +#define HISI_UC_EVENT_URING_MSK		GENMASK(28, 27)
> +#define HISI_UC_EVENT_GLB_EN		BIT(26)
> +#define HISI_UC_VERSION_REG		0x1cf0
> +#define HISI_UC_EVTYPE0_REG		0x1d00
> +#define HISI_UC_EVTYPE_REG(n)		(HISI_UC_EVTYPE0_REG + (n) * 4)
> +#define HISI_UC_EVTYPE_MASK		GENMASK(7, 0)
> +#define HISI_UC_CNTR0_REG		0x1e00
> +#define HISI_UC_CNTR_REG(n)		(HISI_UC_CNTR0_REG + (n) * 8)
> +
> +#define HISI_UC_NR_COUNTERS		0x8
> +#define HISI_UC_V2_NR_EVENTS		0xFF
> +#define HISI_UC_CNTR_REG_BITS		64
> +
> +#define HISI_UC_RD_REQ_TRACETAG		0x4
> +#define HISI_UC_URING_EVENT_MIN		0x47
> +#define HISI_UC_URING_EVENT_MAX		0x59
> +
> +HISI_PMU_EVENT_ATTR_EXTRACTOR(rd_req_en, config1, 0, 0);
> +HISI_PMU_EVENT_ATTR_EXTRACTOR(uring_channel, config1, 5, 4);
> +HISI_PMU_EVENT_ATTR_EXTRACTOR(srcid, config1, 19, 6);
> +HISI_PMU_EVENT_ATTR_EXTRACTOR(srcid_en, config1, 20, 20);
> +
> +static int hisi_uc_pmu_check_format(struct perf_event *event)

check_config or check_event will be clearer.

> +{
> +	struct hisi_pmu *uc_pmu = to_hisi_pmu(event->pmu);
> +
> +	if (hisi_get_srcid_en(event) && !hisi_get_rd_req_en(event)) {
> +		dev_err(uc_pmu->dev,
> +			"Failed to set srcid: depending on read request enabled!\n");
> +		return -EINVAL;
> +	}
> +
> +	if (!hisi_get_uring_channel(event))
> +		return 0;
> +
> +	if ((HISI_GET_EVENTID(event) < HISI_UC_URING_EVENT_MIN) ||
> +	    (HISI_GET_EVENTID(event) > HISI_UC_URING_EVENT_MAX))
> +		dev_warn(uc_pmu->dev,
> +			 "Only events: [%#x ~ %#x] support channel filtering!",
> +			 HISI_UC_URING_EVENT_MIN, HISI_UC_URING_EVENT_MAX);
> +
> +	return 0;
> +}
> +
> +static void hisi_uc_pmu_config_req_tracetag(struct perf_event *event)
> +{
> +	struct hisi_pmu *uc_pmu = to_hisi_pmu(event->pmu);
> +	u32 val;
> +
> +	if (!hisi_get_rd_req_en(event))
> +		return;
> +
> +	val = readl(uc_pmu->base + HISI_UC_TRACETAG_CTRL_REG);
> +
> +	/* The request-type has been configured */
> +	if (FIELD_GET(HISI_UC_TRACETAG_REQ_MSK, val) == HISI_UC_RD_REQ_TRACETAG)
> +		return;
> +
> +	/* Set request-type for tracetag, only read request is supported! */
> +	val &= ~HISI_UC_TRACETAG_REQ_MSK;
> +	val |= FIELD_PREP(HISI_UC_TRACETAG_REQ_MSK, HISI_UC_RD_REQ_TRACETAG);
> +	val |= HISI_UC_TRACETAG_REQ_EN;
> +	writel(val, uc_pmu->base + HISI_UC_TRACETAG_CTRL_REG);
> +}
> +
> +static void hisi_uc_pmu_clear_req_tracetag(struct perf_event *event)
> +{
> +	struct hisi_pmu *uc_pmu = to_hisi_pmu(event->pmu);
> +	u32 val;
> +
> +	if (!hisi_get_rd_req_en(event))
> +		return;
> +
> +	val = readl(uc_pmu->base + HISI_UC_TRACETAG_CTRL_REG);
> +
> +	/* Do nothing, the request-type tracetag has been cleaned up */
> +	if (FIELD_GET(HISI_UC_TRACETAG_REQ_MSK, val) == 0)
> +		return;
> +
> +	/* Clear request-type */
> +	val &= ~HISI_UC_TRACETAG_REQ_MSK;
> +	val &= ~HISI_UC_TRACETAG_REQ_EN;
> +	writel(val, uc_pmu->base + HISI_UC_TRACETAG_CTRL_REG);
> +}
> +
> +static void hisi_uc_pmu_config_srcid_tracetag(struct perf_event *event)
> +{
> +	struct hisi_pmu *uc_pmu = to_hisi_pmu(event->pmu);
> +	u32 val;
> +
> +	if (!hisi_get_srcid_en(event))
> +		return;
> +
> +	val = readl(uc_pmu->base + HISI_UC_TRACETAG_CTRL_REG);
> +
> +	/* Do nothing, the source id has been configured */
> +	if (FIELD_GET(HISI_UC_TRACETAG_SRCID_EN, val))
> +		return;
> +
> +	/* Enable source id tracetag */
> +	val |= HISI_UC_TRACETAG_SRCID_EN;
> +	writel(val, uc_pmu->base + HISI_UC_TRACETAG_CTRL_REG);
> +
> +	val = readl(uc_pmu->base + HISI_UC_SRCID_CTRL_REG);
> +	val &= ~HISI_UC_SRCID_MSK;
> +	val |= FIELD_PREP(HISI_UC_SRCID_MSK, hisi_get_srcid(event));
> +	writel(val, uc_pmu->base + HISI_UC_SRCID_CTRL_REG);
> +
> +	/* Depend on request-type tracetag enabled */
> +	hisi_uc_pmu_config_req_tracetag(event);
> +}
> +
> +static void hisi_uc_pmu_clear_srcid_tracetag(struct perf_event *event)
> +{
> +	struct hisi_pmu *uc_pmu = to_hisi_pmu(event->pmu);
> +	u32 val;
> +
> +	if (!hisi_get_srcid_en(event))
> +		return;
> +
> +	val = readl(uc_pmu->base + HISI_UC_TRACETAG_CTRL_REG);
> +
> +	/* Do nothing, the source id has been cleaned up */
> +	if (FIELD_GET(HISI_UC_TRACETAG_SRCID_EN, val) == 0)
> +		return;
> +
> +	hisi_uc_pmu_clear_req_tracetag(event);
> +
> +	/* Disable source id tracetag */
> +	val &= ~HISI_UC_TRACETAG_SRCID_EN;
> +	writel(val, uc_pmu->base + HISI_UC_TRACETAG_CTRL_REG);
> +
> +	val = readl(uc_pmu->base + HISI_UC_SRCID_CTRL_REG);
> +	val &= ~HISI_UC_SRCID_MSK;
> +	writel(val, uc_pmu->base + HISI_UC_SRCID_CTRL_REG);
> +}
> +
> +static void hisi_uc_pmu_config_uring_channel(struct perf_event *event)
> +{
> +	struct hisi_pmu *uc_pmu = to_hisi_pmu(event->pmu);
> +	u32 uring_channel = hisi_get_uring_channel(event);
> +	u32 val;
> +
> +	/* Do nothing if not being set or is set explicitly to zero (default) */
> +	if (uring_channel == 0)
> +		return;
> +
> +	val = readl(uc_pmu->base + HISI_UC_EVENT_CTRL_REG);
> +
> +	/* Do nothing, the uring_channel has been configured */
> +	if (uring_channel == FIELD_GET(HISI_UC_EVENT_URING_MSK, val))
> +		return;
> +
> +	val &= ~HISI_UC_EVENT_URING_MSK;
> +	val |= FIELD_PREP(HISI_UC_EVENT_URING_MSK, uring_channel);
> +	writel(val, uc_pmu->base + HISI_UC_EVENT_CTRL_REG);
> +}
> +
> +static void hisi_uc_pmu_clear_uring_channel(struct perf_event *event)
> +{
> +	struct hisi_pmu *uc_pmu = to_hisi_pmu(event->pmu);
> +	u32 val;
> +
> +	/* Do nothing if not being set or is set explicitly to zero (default) */
> +	if (hisi_get_uring_channel(event) == 0)
> +		return;
> +
> +	val = readl(uc_pmu->base + HISI_UC_EVENT_CTRL_REG);
> +
> +	/* Do nothing, the uring_channel has been cleaned up */
> +	if (FIELD_GET(HISI_UC_EVENT_URING_MSK, val) == 0)
> +		return;
> +
> +	val &= ~HISI_UC_EVENT_URING_MSK;
> +	writel(val, uc_pmu->base + HISI_UC_EVENT_CTRL_REG);
> +}
> +
> +static void hisi_uc_pmu_enable_filter(struct perf_event *event)
> +{
> +	if (event->attr.config1 == 0)
> +		return;
> +
> +	hisi_uc_pmu_config_uring_channel(event);
> +	hisi_uc_pmu_config_req_tracetag(event);
> +	hisi_uc_pmu_config_srcid_tracetag(event);
> +}
> +
> +static void hisi_uc_pmu_disable_filter(struct perf_event *event)
> +{
> +	if (event->attr.config1 == 0)
> +		return;
> +
> +	hisi_uc_pmu_clear_srcid_tracetag(event);
> +	hisi_uc_pmu_clear_req_tracetag(event);
> +	hisi_uc_pmu_clear_uring_channel(event);
> +}
> +
> +static void hisi_uc_pmu_write_evtype(struct hisi_pmu *uc_pmu, int idx, u32 type)
> +{
> +	u32 val;
> +
> +	/*
> +	 * Select the appropriate event select register.
> +	 * There are 2 32-bit event select registers for the
> +	 * 8 hardware counters, each event code is 8-bit wide.
> +	 */
> +	val = readl(uc_pmu->base + HISI_UC_EVTYPE_REG(idx / 4));
> +	val &= ~(HISI_UC_EVTYPE_MASK << HISI_PMU_EVTYPE_SHIFT(idx));
> +	val |= (type << HISI_PMU_EVTYPE_SHIFT(idx));
> +	writel(val, uc_pmu->base + HISI_UC_EVTYPE_REG(idx / 4));
> +}
> +
> +static void hisi_uc_pmu_start_counters(struct hisi_pmu *uc_pmu)
> +{
> +	u32 val;
> +
> +	val = readl(uc_pmu->base + HISI_UC_EVENT_CTRL_REG);
> +	val |= HISI_UC_EVENT_GLB_EN;
> +	writel(val, uc_pmu->base + HISI_UC_EVENT_CTRL_REG);
> +}
> +
> +static void hisi_uc_pmu_stop_counters(struct hisi_pmu *uc_pmu)
> +{
> +	u32 val;
> +
> +	val = readl(uc_pmu->base + HISI_UC_EVENT_CTRL_REG);
> +	val &= ~HISI_UC_EVENT_GLB_EN;
> +	writel(val, uc_pmu->base + HISI_UC_EVENT_CTRL_REG);
> +}
> +
> +static void hisi_uc_pmu_enable_counter(struct hisi_pmu *uc_pmu,
> +					struct hw_perf_event *hwc)
> +{
> +	u32 val;
> +
> +	/* Enable counter index */
> +	val = readl(uc_pmu->base + HISI_UC_EVENT_CTRL_REG);
> +	val |= (1 << hwc->idx);
> +	writel(val, uc_pmu->base + HISI_UC_EVENT_CTRL_REG);
> +}
> +
> +static void hisi_uc_pmu_disable_counter(struct hisi_pmu *uc_pmu,
> +					struct hw_perf_event *hwc)
> +{
> +	u32 val;
> +
> +	/* Clear counter index */
> +	val = readl(uc_pmu->base + HISI_UC_EVENT_CTRL_REG);
> +	val &= ~(1 << hwc->idx);
> +	writel(val, uc_pmu->base + HISI_UC_EVENT_CTRL_REG);
> +}
> +
> +static u64 hisi_uc_pmu_read_counter(struct hisi_pmu *uc_pmu,
> +				    struct hw_perf_event *hwc)
> +{
> +	return readq(uc_pmu->base + HISI_UC_CNTR_REG(hwc->idx));
> +}
> +
> +static void hisi_uc_pmu_write_counter(struct hisi_pmu *uc_pmu,
> +				      struct hw_perf_event *hwc, u64 val)
> +{
> +	hisi_uc_pmu_start_counters(uc_pmu);
> +	writeq(val, uc_pmu->base + HISI_UC_CNTR_REG(hwc->idx));
> +}
> +
> +static void hisi_uc_pmu_enable_counter_int(struct hisi_pmu *uc_pmu,
> +					   struct hw_perf_event *hwc)
> +{
> +	u32 val;
> +
> +	val = readl(uc_pmu->base + HISI_UC_INT_MASK_REG);
> +	/* Write 0 to enable interrupt */

The comment here and below maybe redundant. The code is self explanatory

> +	val &= ~(1 << hwc->idx);
> +	writel(val, uc_pmu->base + HISI_UC_INT_MASK_REG);
> +}
> +
> +static void hisi_uc_pmu_disable_counter_int(struct hisi_pmu *uc_pmu,
> +					    struct hw_perf_event *hwc)
> +{
> +	u32 val;
> +
> +	val = readl(uc_pmu->base + HISI_UC_INT_MASK_REG);
> +	/* Write 1 to mask interrupt */
> +	val |= (1 << hwc->idx);
> +	writel(val, uc_pmu->base + HISI_UC_INT_MASK_REG);
> +}
> +
> +static u32 hisi_uc_pmu_get_int_status(struct hisi_pmu *uc_pmu)
> +{
> +	return readl(uc_pmu->base + HISI_UC_INT_STS_REG);
> +}
> +
> +static void hisi_uc_pmu_clear_int_status(struct hisi_pmu *uc_pmu, int idx)
> +{
> +	writel(1 << idx, uc_pmu->base + HISI_UC_INT_CLEAR_REG);
> +}
> +
> +static int hisi_uc_pmu_init_data(struct platform_device *pdev,
> +				 struct hisi_pmu *uc_pmu)
> +{
> +	/*
> +	 * Use the SCCL_ID and CCL_ID to identify the UC PMU, while
> +	 * SCCL_ID is in MPIDR[aff2] and CCL_ID is in MPIDR[aff1].
> +	 */

The comment doesn't match what you've done here, these information
is gotten from device properties rather than MPIDR.

Thanks.

> +	if (device_property_read_u32(&pdev->dev, "hisilicon,scl-id",
> +				     &uc_pmu->sccl_id)) {
> +		dev_err(&pdev->dev, "Can not read uc sccl-id!\n");
> +		return -EINVAL;
> +	}
> +
> +	if (device_property_read_u32(&pdev->dev, "hisilicon,ccl-id",
> +				     &uc_pmu->ccl_id)) {
> +		dev_err(&pdev->dev, "Can not read uc ccl-id!\n");
> +		return -EINVAL;
> +	}
> +
> +	if (device_property_read_u32(&pdev->dev, "hisilicon,sub-id",
> +				     &uc_pmu->sub_id)) {
> +		dev_err(&pdev->dev, "Can not read sub-id!\n");
> +		return -EINVAL;
> +	}
> +
> +	uc_pmu->base = devm_platform_ioremap_resource(pdev, 0);
> +	if (IS_ERR(uc_pmu->base)) {
> +		dev_err(&pdev->dev, "ioremap failed for uc_pmu resource\n");
> +		return PTR_ERR(uc_pmu->base);
> +	}
> +
> +	uc_pmu->identifier = readl(uc_pmu->base + HISI_UC_VERSION_REG);
> +
> +	return 0;
> +}
> +
> +static struct attribute *hisi_uc_pmu_format_attr[] = {
> +	HISI_PMU_FORMAT_ATTR(event, "config:0-7"),
> +	HISI_PMU_FORMAT_ATTR(rd_req_en, "config1:0-0"),
> +	HISI_PMU_FORMAT_ATTR(uring_channel, "config1:4-5"),
> +	HISI_PMU_FORMAT_ATTR(srcid, "config1:6-19"),
> +	HISI_PMU_FORMAT_ATTR(srcid_en, "config1:20-20"),
> +	NULL
> +};
> +
> +static const struct attribute_group hisi_uc_pmu_format_group = {
> +	.name = "format",
> +	.attrs = hisi_uc_pmu_format_attr,
> +};
> +
> +static struct attribute *hisi_uc_pmu_events_attr[] = {
> +	HISI_PMU_EVENT_ATTR(sq_time,		0x00),
> +	HISI_PMU_EVENT_ATTR(pq_time,		0x01),
> +	HISI_PMU_EVENT_ATTR(hbm_time,		0x02),
> +	HISI_PMU_EVENT_ATTR(iq_comp_time_cring,	0x03),
> +	HISI_PMU_EVENT_ATTR(iq_comp_time_uring,	0x05),
> +	HISI_PMU_EVENT_ATTR(cpu_rd,		0x10),
> +	HISI_PMU_EVENT_ATTR(cpu_rd64,		0x17),
> +	HISI_PMU_EVENT_ATTR(cpu_rs64,		0x19),
> +	HISI_PMU_EVENT_ATTR(cpu_mru,		0x1a),
> +	HISI_PMU_EVENT_ATTR(cycles,		0x9c),
> +	HISI_PMU_EVENT_ATTR(spipe_hit,		0xb3),
> +	HISI_PMU_EVENT_ATTR(hpipe_hit,		0xdb),
> +	HISI_PMU_EVENT_ATTR(cring_rxdat_cnt,	0xfa),
> +	HISI_PMU_EVENT_ATTR(cring_txdat_cnt,	0xfb),
> +	HISI_PMU_EVENT_ATTR(uring_rxdat_cnt,	0xfc),
> +	HISI_PMU_EVENT_ATTR(uring_txdat_cnt,	0xfd),
> +	NULL
> +};
> +
> +static const struct attribute_group hisi_uc_pmu_events_group = {
> +	.name = "events",
> +	.attrs = hisi_uc_pmu_events_attr,
> +};
> +
> +static DEVICE_ATTR(cpumask, 0444, hisi_cpumask_sysfs_show, NULL);
> +
> +static struct attribute *hisi_uc_pmu_cpumask_attrs[] = {
> +	&dev_attr_cpumask.attr,
> +	NULL,
> +};
> +
> +static const struct attribute_group hisi_uc_pmu_cpumask_attr_group = {
> +	.attrs = hisi_uc_pmu_cpumask_attrs,
> +};
> +
> +static struct device_attribute hisi_uc_pmu_identifier_attr =
> +	__ATTR(identifier, 0444, hisi_uncore_pmu_identifier_attr_show, NULL);
> +
> +static struct attribute *hisi_uc_pmu_identifier_attrs[] = {
> +	&hisi_uc_pmu_identifier_attr.attr,
> +	NULL
> +};
> +
> +static const struct attribute_group hisi_uc_pmu_identifier_group = {
> +	.attrs = hisi_uc_pmu_identifier_attrs,
> +};
> +
> +static const struct attribute_group *hisi_uc_pmu_attr_groups[] = {
> +	&hisi_uc_pmu_format_group,
> +	&hisi_uc_pmu_events_group,
> +	&hisi_uc_pmu_cpumask_attr_group,
> +	&hisi_uc_pmu_identifier_group,
> +	NULL
> +};
> +
> +static const struct hisi_uncore_ops hisi_uncore_uc_pmu_ops = {
> +	.check_format		= hisi_uc_pmu_check_format,
> +	.write_evtype		= hisi_uc_pmu_write_evtype,
> +	.get_event_idx		= hisi_uncore_pmu_get_event_idx,
> +	.start_counters		= hisi_uc_pmu_start_counters,
> +	.stop_counters		= hisi_uc_pmu_stop_counters,
> +	.enable_counter		= hisi_uc_pmu_enable_counter,
> +	.disable_counter	= hisi_uc_pmu_disable_counter,
> +	.enable_counter_int	= hisi_uc_pmu_enable_counter_int,
> +	.disable_counter_int	= hisi_uc_pmu_disable_counter_int,
> +	.write_counter		= hisi_uc_pmu_write_counter,
> +	.read_counter		= hisi_uc_pmu_read_counter,
> +	.get_int_status		= hisi_uc_pmu_get_int_status,
> +	.clear_int_status	= hisi_uc_pmu_clear_int_status,
> +	.enable_filter		= hisi_uc_pmu_enable_filter,
> +	.disable_filter		= hisi_uc_pmu_disable_filter,
> +};
> +
> +static int hisi_uc_pmu_dev_probe(struct platform_device *pdev,
> +				 struct hisi_pmu *uc_pmu)
> +{
> +	int ret;
> +
> +	ret = hisi_uc_pmu_init_data(pdev, uc_pmu);
> +	if (ret)
> +		return ret;
> +
> +	ret = hisi_uncore_pmu_init_irq(uc_pmu, pdev);
> +	if (ret)
> +		return ret;
> +
> +	uc_pmu->pmu_events.attr_groups = hisi_uc_pmu_attr_groups;
> +	uc_pmu->check_event = HISI_UC_EVTYPE_MASK;> +	uc_pmu->ops = &hisi_uncore_uc_pmu_ops;
> +	uc_pmu->counter_bits = HISI_UC_CNTR_REG_BITS;
> +	uc_pmu->num_counters = HISI_UC_NR_COUNTERS;
> +	uc_pmu->dev = &pdev->dev;
> +	uc_pmu->on_cpu = -1;
> +
> +	return 0;
> +}
> +
> +static void hisi_uc_pmu_remove_cpuhp_instance(void *hotplug_node)
> +{
> +	cpuhp_state_remove_instance_nocalls(hisi_uc_pmu_online, hotplug_node);
> +}
> +
> +static void hisi_uc_pmu_unregister_pmu(void *pmu)
> +{
> +	perf_pmu_unregister(pmu);
> +}
> +
> +static int hisi_uc_pmu_probe(struct platform_device *pdev)
> +{
> +	struct hisi_pmu *uc_pmu;
> +	char *name;
> +	int ret;
> +
> +	uc_pmu = devm_kzalloc(&pdev->dev, sizeof(*uc_pmu), GFP_KERNEL);
> +	if (!uc_pmu)
> +		return -ENOMEM;
> +
> +	platform_set_drvdata(pdev, uc_pmu);
> +
> +	ret = hisi_uc_pmu_dev_probe(pdev, uc_pmu);
> +	if (ret)
> +		return ret;
> +
> +	name = devm_kasprintf(&pdev->dev, GFP_KERNEL, "hisi_sccl%d_uc%d_%u",
> +			      uc_pmu->sccl_id, uc_pmu->ccl_id, uc_pmu->sub_id);
> +	if (!name)
> +		return -ENOMEM;
> +
> +	ret = cpuhp_state_add_instance(hisi_uc_pmu_online, &uc_pmu->node);
> +	if (ret)
> +		return dev_err_probe(&pdev->dev, ret, "Error registering hotplug\n");
> +
> +	ret = devm_add_action_or_reset(&pdev->dev,
> +				       hisi_uc_pmu_remove_cpuhp_instance,
> +				       &uc_pmu->node);
> +	if (ret)
> +		return ret;
> +
> +	hisi_pmu_init(uc_pmu, THIS_MODULE);
> +
> +	ret = perf_pmu_register(&uc_pmu->pmu, name, -1);
> +	if (ret)
> +		return ret;
> +
> +	return devm_add_action_or_reset(&pdev->dev,
> +					hisi_uc_pmu_unregister_pmu,
> +					&uc_pmu->pmu);
> +}
> +
> +static const struct acpi_device_id hisi_uc_pmu_acpi_match[] = {
> +	{ "HISI0291", },
> +	{}
> +};
> +MODULE_DEVICE_TABLE(acpi, hisi_uc_pmu_acpi_match);
> +
> +static struct platform_driver hisi_uc_pmu_driver = {
> +	.driver = {
> +		.name = "hisi_uc_pmu",
> +		.acpi_match_table = hisi_uc_pmu_acpi_match,
> +		/*
> +		 * We have not worked out a safe bind/unbind process,
> +		 * so this is not supported yet.
> +		 */
> +		.suppress_bind_attrs = true,
> +	},
> +	.probe = hisi_uc_pmu_probe,
> +};
> +
> +static int __init hisi_uc_pmu_module_init(void)
> +{
> +	int ret;
> +
> +	ret = cpuhp_setup_state_multi(CPUHP_AP_ONLINE_DYN,
> +				      "perf/hisi/uc:online",
> +				      hisi_uncore_pmu_online_cpu,
> +				      hisi_uncore_pmu_offline_cpu);
> +	if (ret < 0) {
> +		pr_err("UC PMU: Error setup hotplug, ret = %d\n", ret);
> +		return ret;
> +	}
> +	hisi_uc_pmu_online = ret;
> +
> +	ret = platform_driver_register(&hisi_uc_pmu_driver);
> +	if (ret)
> +		cpuhp_remove_multi_state(hisi_uc_pmu_online);
> +
> +	return ret;
> +}
> +module_init(hisi_uc_pmu_module_init);
> +
> +static void __exit hisi_uc_pmu_module_exit(void)
> +{
> +	platform_driver_unregister(&hisi_uc_pmu_driver);
> +	cpuhp_remove_multi_state(hisi_uc_pmu_online);
> +}
> +module_exit(hisi_uc_pmu_module_exit);
> +
> +MODULE_DESCRIPTION("HiSilicon SoC UC uncore PMU driver");
> +MODULE_LICENSE("GPL");
> +MODULE_AUTHOR("Junhao He <hejunhao3@...wei.com>");
> 

Powered by blists - more mailing lists