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Message-ID: <CANk1AXR-i-h98XfbY4wMubs=z7BM2ZV0nPD513wnFrKwYh8vFg@mail.gmail.com>
Date: Thu, 16 May 2019 12:28:08 -0500
From: Alan Tull <atull@...nel.org>
To: Wu Hao <hao.wu@...el.com>
Cc: Moritz Fischer <mdf@...nel.org>, linux-fpga@...r.kernel.org,
linux-kernel <linux-kernel@...r.kernel.org>,
linux-api@...r.kernel.org, Luwei Kang <luwei.kang@...el.com>,
Xu Yilun <yilun.xu@...el.com>
Subject: Re: [PATCH v2 18/18] fpga: dfl: fme: add performance reporting support
On Mon, Apr 29, 2019 at 4:13 AM Wu Hao <hao.wu@...el.com> wrote:
Hi Hao,
>
> This patch adds support for performance reporting private feature
> for FPGA Management Engine (FME). Actually it supports 4 categories
> performance counters, 'clock', 'cache', 'iommu' and 'fabric', user
> could read the performance counter via exposed sysfs interfaces.
> Please refer to sysfs doc for more details.
>
> Signed-off-by: Luwei Kang <luwei.kang@...el.com>
> Signed-off-by: Xu Yilun <yilun.xu@...el.com>
> Signed-off-by: Wu Hao <hao.wu@...el.com>
> ---
> v2: improve sysfs doc
> ---
> Documentation/ABI/testing/sysfs-platform-dfl-fme | 93 +++
> drivers/fpga/Makefile | 1 +
> drivers/fpga/dfl-fme-main.c | 4 +
> drivers/fpga/dfl-fme-perf.c | 950 +++++++++++++++++++++++
> drivers/fpga/dfl-fme.h | 2 +
> drivers/fpga/dfl.c | 1 +
> drivers/fpga/dfl.h | 2 +
> 7 files changed, 1053 insertions(+)
> create mode 100644 drivers/fpga/dfl-fme-perf.c
>
> diff --git a/Documentation/ABI/testing/sysfs-platform-dfl-fme b/Documentation/ABI/testing/sysfs-platform-dfl-fme
> index 503984b..a7f7eb6 100644
> --- a/Documentation/ABI/testing/sysfs-platform-dfl-fme
> +++ b/Documentation/ABI/testing/sysfs-platform-dfl-fme
> @@ -250,3 +250,96 @@ Description: Write-only. Write error code to this file to clear all errors
> logged in errors, first_error and next_error. Write fails with
> -EINVAL if input parsing fails or input error code doesn't
> match.
> +
> +What: /sys/bus/platform/devices/dfl-fme.0/perf/clock
> +Date: April 2019
> +KernelVersion: 5.2
> +Contact: Wu Hao <hao.wu@...el.com>
> +Description: Read-Only. Read for Accelerator Function Unit (AFU) clock
> + counter.
> +
> +What: /sys/bus/platform/devices/dfl-fme.0/perf/cache/freeze
> +Date: April 2019
> +KernelVersion: 5.2
> +Contact: Wu Hao <hao.wu@...el.com>
> +Description: Read-Write. Read this file for the current status of 'cache'
> + category performance counters, and Write '1' or '0' to freeze
> + or unfreeze 'cache' performance counters.
> +
> +What: /sys/bus/platform/devices/dfl-fme.0/perf/cache/<counter>
> +Date: April 2019
> +KernelVersion: 5.2
> +Contact: Wu Hao <hao.wu@...el.com>
> +Description: Read-Only. Read 'cache' category performance counters:
> + read_hit, read_miss, write_hit, write_miss, hold_request,
> + data_write_port_contention, tag_write_port_contention,
> + tx_req_stall, rx_req_stall and rx_eviction.
> +
> +What: /sys/bus/platform/devices/dfl-fme.0/perf/iommu/freeze
> +Date: April 2019
> +KernelVersion: 5.2
> +Contact: Wu Hao <hao.wu@...el.com>
> +Description: Read-Write. Read this file for the current status of 'iommu'
> + category performance counters, and Write '1' or '0' to freeze
> + or unfreeze 'iommu' performance counters.
> +
> +What: /sys/bus/platform/devices/dfl-fme.0/perf/iommu/<sip_counter>
> +Date: April 2019
> +KernelVersion: 5.2
> +Contact: Wu Hao <hao.wu@...el.com>
> +Description: Read-Only. Read 'iommu' category 'sip' sub category
> + performance counters: iotlb_4k_hit, iotlb_2m_hit,
> + iotlb_1g_hit, slpwc_l3_hit, slpwc_l4_hit, rcc_hit,
> + rcc_miss, iotlb_4k_miss, iotlb_2m_miss, iotlb_1g_miss,
> + slpwc_l3_miss and slpwc_l4_miss.
> +
> +What: /sys/bus/platform/devices/dfl-fme.0/perf/iommu/afu0/<counter>
> +Date: April 2019
> +KernelVersion: 5.2
> +Contact: Wu Hao <hao.wu@...el.com>
> +Description: Read-Only. Read 'iommu' category 'afuX' sub category
> + performance counters: read_transaction, write_transaction,
> + devtlb_read_hit, devtlb_write_hit, devtlb_4k_fill,
> + devtlb_2m_fill and devtlb_1g_fill.
> +
> +What: /sys/bus/platform/devices/dfl-fme.0/perf/fabric/freeze
> +Date: April 2019
> +KernelVersion: 5.2
> +Contact: Wu Hao <hao.wu@...el.com>
> +Description: Read-Write. Read this file for the current status of 'fabric'
> + category performance counters, and Write '1' or '0' to freeze
> + or unfreeze 'fabric' performance counters.
> +
> +What: /sys/bus/platform/devices/dfl-fme.0/perf/fabric/<counter>
> +Date: April 2019
> +KernelVersion: 5.2
> +Contact: Wu Hao <hao.wu@...el.com>
> +Description: Read-Only. Read 'fabric' category performance counters:
> + pcie0_read, pcie0_write, pcie1_read, pcie1_write,
> + upi_read, upi_write and mmio_read.
Also mmio_write
> +
> +What: /sys/bus/platform/devices/dfl-fme.0/perf/fabric/enable
> +Date: April 2019
> +KernelVersion: 5.2
> +Contact: Wu Hao <hao.wu@...el.com>
> +Description: Read-Write. Read this file for current status of device level
> + fabric counters. Write "1" to enable device level fabric
> + counters. Once device level fabric counters are enabled, port
> + level fabric counters will be disabled automatically.
> +
> +What: /sys/bus/platform/devices/dfl-fme.0/perf/fabric/port0/<counter>
> +Date: April 2019
> +KernelVersion: 5.2
> +Contact: Wu Hao <hao.wu@...el.com>
> +Description: Read-Only. Read 'fabric' category "portX" sub category
> + performance counters: pcie0_read, pcie0_write, pcie1_read,
> + pcie1_write, upi_read, upi_write and mmio_read.
> +
> +What: /sys/bus/platform/devices/dfl-fme.0/perf/fabric/port0/enable
> +Date: April 2019
> +KernelVersion: 5.2
> +Contact: Wu Hao <hao.wu@...el.com>
> +Description: Read-Write. Read this file for current status of port level
> + fabric counters. Write "1" to enable port level fabric counters.
> + Once port level fabric counters are enabled, device level fabric
> + counters will be disabled automatically.
> diff --git a/drivers/fpga/Makefile b/drivers/fpga/Makefile
> index 1a9fa3d..7df3971 100644
> --- a/drivers/fpga/Makefile
> +++ b/drivers/fpga/Makefile
> @@ -39,6 +39,7 @@ obj-$(CONFIG_FPGA_DFL_FME_REGION) += dfl-fme-region.o
> obj-$(CONFIG_FPGA_DFL_AFU) += dfl-afu.o
>
> dfl-fme-objs := dfl-fme-main.o dfl-fme-pr.o dfl-fme-error.o
> +dfl-fme-objs += dfl-fme-perf.o
> dfl-afu-objs := dfl-afu-main.o dfl-afu-region.o dfl-afu-dma-region.o
> dfl-afu-objs += dfl-afu-error.o
>
> diff --git a/drivers/fpga/dfl-fme-main.c b/drivers/fpga/dfl-fme-main.c
> index 1986b32..221f4ec 100644
> --- a/drivers/fpga/dfl-fme-main.c
> +++ b/drivers/fpga/dfl-fme-main.c
> @@ -690,6 +690,10 @@ static void fme_power_mgmt_uinit(struct platform_device *pdev,
> .ops = &fme_global_err_ops,
> },
> {
> + .id_table = fme_perf_id_table,
> + .ops = &fme_perf_ops,
> + },
> + {
> .ops = NULL,
> },
> };
> diff --git a/drivers/fpga/dfl-fme-perf.c b/drivers/fpga/dfl-fme-perf.c
> new file mode 100644
> index 0000000..035bb68
> --- /dev/null
> +++ b/drivers/fpga/dfl-fme-perf.c
> @@ -0,0 +1,950 @@
> +// SPDX-License-Identifier: GPL-2.0
> +/*
> + * Driver for FPGA Management Engine (FME) Global Performance Reporting
> + *
> + * Copyright 2019 Intel Corporation, Inc.
> + *
> + * Authors:
> + * Kang Luwei <luwei.kang@...el.com>
> + * Xiao Guangrong <guangrong.xiao@...ux.intel.com>
> + * Wu Hao <hao.wu@...el.com>
> + * Joseph Grecco <joe.grecco@...el.com>
> + * Enno Luebbers <enno.luebbers@...el.com>
> + * Tim Whisonant <tim.whisonant@...el.com>
> + * Ananda Ravuri <ananda.ravuri@...el.com>
> + * Mitchel, Henry <henry.mitchel@...el.com>
> + */
> +
> +#include "dfl.h"
> +#include "dfl-fme.h"
> +
> +/*
> + * Performance Counter Registers for Cache.
> + *
> + * Cache Events are listed below as CACHE_EVNT_*.
> + */
> +#define CACHE_CTRL 0x8
> +#define CACHE_RESET_CNTR BIT_ULL(0)
> +#define CACHE_FREEZE_CNTR BIT_ULL(8)
> +#define CACHE_CTRL_EVNT GENMASK_ULL(19, 16)
> +#define CACHE_EVNT_RD_HIT 0x0
> +#define CACHE_EVNT_WR_HIT 0x1
> +#define CACHE_EVNT_RD_MISS 0x2
> +#define CACHE_EVNT_WR_MISS 0x3
> +#define CACHE_EVNT_RSVD 0x4
> +#define CACHE_EVNT_HOLD_REQ 0x5
> +#define CACHE_EVNT_DATA_WR_PORT_CONTEN 0x6
> +#define CACHE_EVNT_TAG_WR_PORT_CONTEN 0x7
> +#define CACHE_EVNT_TX_REQ_STALL 0x8
> +#define CACHE_EVNT_RX_REQ_STALL 0x9
> +#define CACHE_EVNT_EVICTIONS 0xa
> +#define CACHE_EVNT_MAX CACHE_EVNT_EVICTIONS
> +#define CACHE_CHANNEL_SEL BIT_ULL(20)
> +#define CACHE_CHANNEL_RD 0
> +#define CACHE_CHANNEL_WR 1
> +#define CACHE_CHANNEL_MAX 2
> +#define CACHE_CNTR0 0x10
> +#define CACHE_CNTR1 0x18
> +#define CACHE_CNTR_EVNT_CNTR GENMASK_ULL(47, 0)
> +#define CACHE_CNTR_EVNT GENMASK_ULL(63, 60)
> +
> +/*
> + * Performance Counter Registers for Fabric.
> + *
> + * Fabric Events are listed below as FAB_EVNT_*
> + */
> +#define FAB_CTRL 0x20
> +#define FAB_RESET_CNTR BIT_ULL(0)
> +#define FAB_FREEZE_CNTR BIT_ULL(8)
> +#define FAB_CTRL_EVNT GENMASK_ULL(19, 16)
> +#define FAB_EVNT_PCIE0_RD 0x0
> +#define FAB_EVNT_PCIE0_WR 0x1
> +#define FAB_EVNT_PCIE1_RD 0x2
> +#define FAB_EVNT_PCIE1_WR 0x3
> +#define FAB_EVNT_UPI_RD 0x4
> +#define FAB_EVNT_UPI_WR 0x5
> +#define FAB_EVNT_MMIO_RD 0x6
> +#define FAB_EVNT_MMIO_WR 0x7
> +#define FAB_EVNT_MAX FAB_EVNT_MMIO_WR
> +#define FAB_PORT_ID GENMASK_ULL(21, 20)
> +#define FAB_PORT_FILTER BIT_ULL(23)
> +#define FAB_PORT_FILTER_DISABLE 0
> +#define FAB_PORT_FILTER_ENABLE 1
> +#define FAB_CNTR 0x28
> +#define FAB_CNTR_EVNT_CNTR GENMASK_ULL(59, 0)
> +#define FAB_CNTR_EVNT GENMASK_ULL(63, 60)
> +
> +/*
> + * Performance Counter Registers for Clock.
> + *
> + * Clock Counter can't be reset or frozen by SW.
> + */
> +#define CLK_CNTR 0x30
> +
> +/*
> + * Performance Counter Registers for IOMMU / VT-D.
> + *
> + * VT-D Events are listed below as VTD_EVNT_* and VTD_SIP_EVNT_*
> + */
> +#define VTD_CTRL 0x38
> +#define VTD_RESET_CNTR BIT_ULL(0)
> +#define VTD_FREEZE_CNTR BIT_ULL(8)
> +#define VTD_CTRL_EVNT GENMASK_ULL(19, 16)
> +#define VTD_EVNT_AFU_MEM_RD_TRANS 0x0
> +#define VTD_EVNT_AFU_MEM_WR_TRANS 0x1
> +#define VTD_EVNT_AFU_DEVTLB_RD_HIT 0x2
> +#define VTD_EVNT_AFU_DEVTLB_WR_HIT 0x3
> +#define VTD_EVNT_DEVTLB_4K_FILL 0x4
> +#define VTD_EVNT_DEVTLB_2M_FILL 0x5
> +#define VTD_EVNT_DEVTLB_1G_FILL 0x6
> +#define VTD_EVNT_MAX VTD_EVNT_DEVTLB_1G_FILL
> +#define VTD_CNTR 0x40
> +#define VTD_CNTR_EVNT GENMASK_ULL(63, 60)
> +#define VTD_CNTR_EVNT_CNTR GENMASK_ULL(47, 0)
> +#define VTD_SIP_CTRL 0x48
> +#define VTD_SIP_RESET_CNTR BIT_ULL(0)
> +#define VTD_SIP_FREEZE_CNTR BIT_ULL(8)
> +#define VTD_SIP_CTRL_EVNT GENMASK_ULL(19, 16)
> +#define VTD_SIP_EVNT_IOTLB_4K_HIT 0x0
> +#define VTD_SIP_EVNT_IOTLB_2M_HIT 0x1
> +#define VTD_SIP_EVNT_IOTLB_1G_HIT 0x2
> +#define VTD_SIP_EVNT_SLPWC_L3_HIT 0x3
> +#define VTD_SIP_EVNT_SLPWC_L4_HIT 0x4
> +#define VTD_SIP_EVNT_RCC_HIT 0x5
> +#define VTD_SIP_EVNT_IOTLB_4K_MISS 0x6
> +#define VTD_SIP_EVNT_IOTLB_2M_MISS 0x7
> +#define VTD_SIP_EVNT_IOTLB_1G_MISS 0x8
> +#define VTD_SIP_EVNT_SLPWC_L3_MISS 0x9
> +#define VTD_SIP_EVNT_SLPWC_L4_MISS 0xa
> +#define VTD_SIP_EVNT_RCC_MISS 0xb
> +#define VTD_SIP_EVNT_MAX VTD_SIP_EVNT_RCC_MISS
> +#define VTD_SIP_CNTR 0X50
> +#define VTD_SIP_CNTR_EVNT GENMASK_ULL(63, 60)
> +#define VTD_SIP_CNTR_EVNT_CNTR GENMASK_ULL(47, 0)
> +
> +#define PERF_OBJ_ROOT_ID (~0)
> +
> +#define PERF_TIMEOUT 30
> +
> +/**
> + * struct perf_object - object of performance counter
> + *
> + * @id: instance id. PERF_OBJ_ROOT_ID indicates it is a parent object which
> + * counts performance counters for all instances.
> + * @attr_groups: the sysfs files are associated with this object.
> + * @feature: pointer to related private feature.
> + * @node: used to link itself to parent's children list.
> + * @children: used to link its children objects together.
> + * @kobj: generic kobject interface.
> + *
> + * 'node' and 'children' are used to construct parent-children hierarchy.
> + */
> +struct perf_object {
> + int id;
> + const struct attribute_group **attr_groups;
> + struct dfl_feature *feature;
> +
> + struct list_head node;
> + struct list_head children;
> + struct kobject kobj;
> +};
> +
> +/**
> + * struct perf_obj_attribute - attribute of perf object
> + *
> + * @attr: attribute of this perf object.
> + * @show: show callback for sysfs attribute.
> + * @store: store callback for sysfs attribute.
> + */
> +struct perf_obj_attribute {
> + struct attribute attr;
> + ssize_t (*show)(struct perf_object *pobj, char *buf);
> + ssize_t (*store)(struct perf_object *pobj,
> + const char *buf, size_t n);
> +};
> +
> +#define to_perf_obj_attr(_attr) \
> + container_of(_attr, struct perf_obj_attribute, attr)
> +#define to_perf_obj(_kobj) \
> + container_of(_kobj, struct perf_object, kobj)
> +
> +#define PERF_OBJ_ATTR(_name, _filename, _mode, _show, _store) \
> +struct perf_obj_attribute perf_obj_attr_##_name = \
> + __ATTR(_filename, _mode, _show, _store)
This #define and the ones below set up an interdependency with sysfs.h
that I'm scratching my head about. You're defining your own type of
attribute struct which is fine, but counting on __ATTR to continue to
work with it in the future. It wouldn't be much of a change here to
define your own macro here (which is the same as __ATTR) and then use
it for your PERF_OBJ_ATTR_RW, etc. Maybe I'm being overcautious, but
it's a small change.
> +
> +#define PERF_OBJ_ATTR_RW(_name) \
> + struct perf_obj_attribute perf_obj_attr_##_name = __ATTR_RW(_name)
> +#define PERF_OBJ_ATTR_RO(_name) \
> + struct perf_obj_attribute perf_obj_attr_##_name = __ATTR_RO(_name)
> +#define PERF_OBJ_ATTR_WO(_name) \
> + struct perf_obj_attribute perf_obj_attr_##_name = __ATTR_WO(_name)
> +
> +static ssize_t perf_obj_attr_show(struct kobject *kobj,
> + struct attribute *__attr, char *buf)
> +{
> + struct perf_obj_attribute *attr = to_perf_obj_attr(__attr);
> + struct perf_object *pobj = to_perf_obj(kobj);
> + ssize_t ret = -EIO;
Would this be -EPERM?
> +
> + if (attr->show)
> + ret = attr->show(pobj, buf);
Actually is it even possible for !attr->show if this were a WO attribute?
> + return ret;
> +}
> +
> +static ssize_t perf_obj_attr_store(struct kobject *kobj,
> + struct attribute *__attr,
> + const char *buf, size_t n)
> +{
> + struct perf_obj_attribute *attr = to_perf_obj_attr(__attr);
> + struct perf_object *pobj = to_perf_obj(kobj);
> + ssize_t ret = -EIO;
Same here
> +
> + if (attr->store)
> + ret = attr->store(pobj, buf, n);
> + return ret;
> +}
> +
> +static const struct sysfs_ops perf_obj_sysfs_ops = {
> + .show = perf_obj_attr_show,
> + .store = perf_obj_attr_store,
> +};
> +
> +static void perf_obj_release(struct kobject *kobj)
> +{
> + kfree(to_perf_obj(kobj));
> +}
> +
> +static struct kobj_type perf_obj_ktype = {
> + .sysfs_ops = &perf_obj_sysfs_ops,
> + .release = perf_obj_release,
> +};
> +
> +static struct perf_object *
> +create_perf_obj(struct dfl_feature *feature, struct kobject *parent, int id,
> + const struct attribute_group **groups, const char *name)
> +{
> + struct perf_object *pobj;
> + int ret;
> +
> + pobj = kzalloc(sizeof(*pobj), GFP_KERNEL);
> + if (!pobj)
> + return ERR_PTR(-ENOMEM);
> +
> + pobj->id = id;
> + pobj->feature = feature;
> + pobj->attr_groups = groups;
> + INIT_LIST_HEAD(&pobj->node);
> + INIT_LIST_HEAD(&pobj->children);
> +
> + if (id != PERF_OBJ_ROOT_ID)
> + ret = kobject_init_and_add(&pobj->kobj, &perf_obj_ktype,
> + parent, "%s%d", name, id);
> + else
> + ret = kobject_init_and_add(&pobj->kobj, &perf_obj_ktype,
> + parent, "%s", name);
> + if (ret)
> + goto put_exit;
> +
> + if (pobj->attr_groups) {
> + ret = sysfs_create_groups(&pobj->kobj, pobj->attr_groups);
> + if (ret)
> + goto del_exit;
> + }
> +
> + return pobj;
> +
> +del_exit:
> + kobject_del(&pobj->kobj);
kobject_put will delete and clean up, you won't need kobject_del.
> +put_exit:
> + kobject_put(&pobj->kobj);
> + return ERR_PTR(ret);
> +}
> +
> +/*
> + * Counter Sysfs Interface for Clock.
> + */
> +static ssize_t clock_show(struct perf_object *pobj, char *buf)
> +{
> + void __iomem *base = pobj->feature->ioaddr;
> +
> + return scnprintf(buf, PAGE_SIZE, "0x%llx\n",
> + (unsigned long long)readq(base + CLK_CNTR));
It's fine to use sprintf, as mentioned recently on one of the other patches.
> +}
> +static PERF_OBJ_ATTR_RO(clock);
> +
> +static struct attribute *clock_attrs[] = {
> + &perf_obj_attr_clock.attr,
> + NULL,
> +};
> +
> +static struct attribute_group clock_attr_group = {
> + .attrs = clock_attrs,
> +};
> +
> +static const struct attribute_group *perf_dev_attr_groups[] = {
> + &clock_attr_group,
> + NULL,
> +};
> +
> +static void destroy_perf_obj(struct perf_object *pobj)
> +{
> + struct perf_object *obj, *obj_tmp;
> +
> + list_for_each_entry_safe(obj, obj_tmp, &pobj->children, node)
> + destroy_perf_obj(obj);
> +
> + list_del(&pobj->node);
> + if (pobj->attr_groups)
> + sysfs_remove_groups(&pobj->kobj, pobj->attr_groups);
The attributes should be removed before anything else goes away.
> + kobject_put(&pobj->kobj);
> +}
> +
> +static struct perf_object *create_perf_dev(struct dfl_feature *feature)
> +{
> + struct platform_device *pdev = feature->pdev;
> +
> + return create_perf_obj(feature, &pdev->dev.kobj, PERF_OBJ_ROOT_ID,
> + perf_dev_attr_groups, "perf");
> +}
> +
> +/*
> + * Counter Sysfs Interfaces for Cache.
> + */
> +static ssize_t cache_freeze_show(struct perf_object *pobj, char *buf)
> +{
> + void __iomem *base = pobj->feature->ioaddr;
> + u64 v;
> +
> + v = readq(base + CACHE_CTRL);
> +
> + return scnprintf(buf, PAGE_SIZE, "%u\n",
> + (unsigned int)FIELD_GET(CACHE_FREEZE_CNTR, v));
> +}
> +
> +static ssize_t cache_freeze_store(struct perf_object *pobj,
> + const char *buf, size_t n)
> +{
> + struct dfl_feature *feature = pobj->feature;
> + struct dfl_feature_platform_data *pdata;
> + void __iomem *base = feature->ioaddr;
> + bool state;
> + u64 v;
> +
> + if (strtobool(buf, &state))
> + return -EINVAL;
> +
> + pdata = dev_get_platdata(&feature->pdev->dev);
> +
> + mutex_lock(&pdata->lock);
> + v = readq(base + CACHE_CTRL);
> + v &= ~CACHE_FREEZE_CNTR;
> + v |= FIELD_PREP(CACHE_FREEZE_CNTR, state ? 1 : 0);
> + writeq(v, base + CACHE_CTRL);
> + mutex_unlock(&pdata->lock);
> +
> + return n;
> +}
> +static PERF_OBJ_ATTR(cache_freeze, freeze, 0644,
> + cache_freeze_show, cache_freeze_store);
> +
> +static ssize_t read_cache_counter(struct perf_object *pobj, char *buf,
> + u8 channel, u8 event)
> +{
> + struct dfl_feature *feature = pobj->feature;
> + struct dfl_feature_platform_data *pdata;
> + void __iomem *base = feature->ioaddr;
> + u64 v, count;
> +
> + if (event > CACHE_EVNT_MAX || channel > CACHE_CHANNEL_MAX)
> + return -EINVAL;
This would only happen if there was a coding error using one of the
macros below, right?
> +
> + pdata = dev_get_platdata(&feature->pdev->dev);
> +
> + mutex_lock(&pdata->lock);
> + /* set channel access type and cache event code. */
> + v = readq(base + CACHE_CTRL);
> + v &= ~(CACHE_CHANNEL_SEL | CACHE_CTRL_EVNT);
> + v |= FIELD_PREP(CACHE_CHANNEL_SEL, channel);
> + v |= FIELD_PREP(CACHE_CTRL_EVNT, event);
> + writeq(v, base + CACHE_CTRL);
> +
> + if (readq_poll_timeout(base + CACHE_CNTR0, v,
> + FIELD_GET(CACHE_CNTR_EVNT, v) == event,
> + 1, PERF_TIMEOUT)) {
> + dev_err(&feature->pdev->dev, "timeout, unmatched cache event type in counter registers.\n");
> + mutex_unlock(&pdata->lock);
> + return -ETIMEDOUT;
> + }
> +
> + v = readq(base + CACHE_CNTR0);
> + count = FIELD_GET(CACHE_CNTR_EVNT_CNTR, v);
> + v = readq(base + CACHE_CNTR1);
> + count += FIELD_GET(CACHE_CNTR_EVNT_CNTR, v);
> + mutex_unlock(&pdata->lock);
> +
> + return scnprintf(buf, PAGE_SIZE, "0x%llx\n", (unsigned long long)count);
> +}
> +
> +#define CACHE_SHOW(name, type, event) \
> +static ssize_t name##_show(struct perf_object *pobj, char *buf) \
> +{ \
> + return read_cache_counter(pobj, buf, type, event); \
> +} \
> +static PERF_OBJ_ATTR_RO(name)
> +
> +CACHE_SHOW(read_hit, CACHE_CHANNEL_RD, CACHE_EVNT_RD_HIT);
> +CACHE_SHOW(read_miss, CACHE_CHANNEL_RD, CACHE_EVNT_RD_MISS);
> +CACHE_SHOW(write_hit, CACHE_CHANNEL_WR, CACHE_EVNT_WR_HIT);
> +CACHE_SHOW(write_miss, CACHE_CHANNEL_WR, CACHE_EVNT_WR_MISS);
> +CACHE_SHOW(hold_request, CACHE_CHANNEL_RD, CACHE_EVNT_HOLD_REQ);
> +CACHE_SHOW(tx_req_stall, CACHE_CHANNEL_RD, CACHE_EVNT_TX_REQ_STALL);
> +CACHE_SHOW(rx_req_stall, CACHE_CHANNEL_RD, CACHE_EVNT_RX_REQ_STALL);
> +CACHE_SHOW(rx_eviction, CACHE_CHANNEL_RD, CACHE_EVNT_EVICTIONS);
> +CACHE_SHOW(data_write_port_contention, CACHE_CHANNEL_WR,
> + CACHE_EVNT_DATA_WR_PORT_CONTEN);
> +CACHE_SHOW(tag_write_port_contention, CACHE_CHANNEL_WR,
> + CACHE_EVNT_TAG_WR_PORT_CONTEN);
> +
> +static struct attribute *cache_attrs[] = {
> + &perf_obj_attr_read_hit.attr,
> + &perf_obj_attr_read_miss.attr,
> + &perf_obj_attr_write_hit.attr,
> + &perf_obj_attr_write_miss.attr,
> + &perf_obj_attr_hold_request.attr,
> + &perf_obj_attr_data_write_port_contention.attr,
> + &perf_obj_attr_tag_write_port_contention.attr,
> + &perf_obj_attr_tx_req_stall.attr,
> + &perf_obj_attr_rx_req_stall.attr,
> + &perf_obj_attr_rx_eviction.attr,
> + &perf_obj_attr_cache_freeze.attr,
> + NULL,
> +};
> +
> +static struct attribute_group cache_attr_group = {
> + .attrs = cache_attrs,
> +};
> +
> +static const struct attribute_group *cache_attr_groups[] = {
> + &cache_attr_group,
> + NULL,
> +};
> +
> +static int create_perf_cache_obj(struct perf_object *perf_dev)
> +{
> + struct perf_object *pobj;
> +
> + pobj = create_perf_obj(perf_dev->feature, &perf_dev->kobj,
> + PERF_OBJ_ROOT_ID, cache_attr_groups, "cache");
> + if (IS_ERR(pobj))
> + return PTR_ERR(pobj);
> +
> + list_add(&pobj->node, &perf_dev->children);
> +
> + return 0;
> +}
> +
> +/*
> + * Counter Sysfs Interfaces for VT-D / IOMMU.
> + */
> +static ssize_t vtd_freeze_show(struct perf_object *pobj, char *buf)
> +{
> + void __iomem *base = pobj->feature->ioaddr;
> + u64 v;
> +
> + v = readq(base + VTD_CTRL);
> +
> + return scnprintf(buf, PAGE_SIZE, "%u\n",
> + (unsigned int)FIELD_GET(VTD_FREEZE_CNTR, v));
> +}
> +
> +static ssize_t vtd_freeze_store(struct perf_object *pobj,
> + const char *buf, size_t n)
> +{
> + struct dfl_feature *feature = pobj->feature;
> + struct dfl_feature_platform_data *pdata;
> + void __iomem *base = feature->ioaddr;
> + bool state;
> + u64 v;
> +
> + if (strtobool(buf, &state))
> + return -EINVAL;
> +
> + pdata = dev_get_platdata(&feature->pdev->dev);
> +
> + mutex_lock(&pdata->lock);
> + v = readq(base + VTD_CTRL);
> + v &= ~VTD_FREEZE_CNTR;
> + v |= FIELD_PREP(VTD_FREEZE_CNTR, state ? 1 : 0);
> + writeq(v, base + VTD_CTRL);
> + mutex_unlock(&pdata->lock);
> +
> + return n;
> +}
> +static PERF_OBJ_ATTR(vtd_freeze, freeze, 0644,
> + vtd_freeze_show, vtd_freeze_store);
> +
> +static struct attribute *iommu_top_attrs[] = {
> + &perf_obj_attr_vtd_freeze.attr,
> + NULL,
> +};
> +
> +static struct attribute_group iommu_top_attr_group = {
> + .attrs = iommu_top_attrs,
> +};
> +
> +static ssize_t read_iommu_sip_counter(struct perf_object *pobj,
> + u8 event, char *buf)
> +{
> + struct dfl_feature *feature = pobj->feature;
> + struct dfl_feature_platform_data *pdata;
> + void __iomem *base = feature->ioaddr;
> + u64 v, count;
> +
> + if (event > VTD_SIP_EVNT_MAX)
> + return -EINVAL;
> +
> + pdata = dev_get_platdata(&feature->pdev->dev);
> +
> + mutex_lock(&pdata->lock);
> + v = readq(base + VTD_SIP_CTRL);
> + v &= ~VTD_SIP_CTRL_EVNT;
> + v |= FIELD_PREP(VTD_SIP_CTRL_EVNT, event);
> + writeq(v, base + VTD_SIP_CTRL);
> +
> + if (readq_poll_timeout(base + VTD_SIP_CNTR, v,
> + FIELD_GET(VTD_SIP_CNTR_EVNT, v) == event,
> + 1, PERF_TIMEOUT)) {
> + dev_err(&feature->pdev->dev, "timeout, unmatched VTd SIP event type in counter registers\n");
> + mutex_unlock(&pdata->lock);
> + return -ETIMEDOUT;
> + }
> +
> + v = readq(base + VTD_SIP_CNTR);
> + count = FIELD_GET(VTD_SIP_CNTR_EVNT_CNTR, v);
> + mutex_unlock(&pdata->lock);
> +
> + return scnprintf(buf, PAGE_SIZE, "0x%llx\n", (unsigned long long)count);
> +}
> +
> +#define VTD_SIP_SHOW(name, event) \
> +static ssize_t name##_show(struct perf_object *pobj, char *buf) \
> +{ \
> + return read_iommu_sip_counter(pobj, event, buf); \
> +} \
> +static PERF_OBJ_ATTR_RO(name)
> +
> +VTD_SIP_SHOW(iotlb_4k_hit, VTD_SIP_EVNT_IOTLB_4K_HIT);
> +VTD_SIP_SHOW(iotlb_2m_hit, VTD_SIP_EVNT_IOTLB_2M_HIT);
> +VTD_SIP_SHOW(iotlb_1g_hit, VTD_SIP_EVNT_IOTLB_1G_HIT);
> +VTD_SIP_SHOW(slpwc_l3_hit, VTD_SIP_EVNT_SLPWC_L3_HIT);
> +VTD_SIP_SHOW(slpwc_l4_hit, VTD_SIP_EVNT_SLPWC_L4_HIT);
> +VTD_SIP_SHOW(rcc_hit, VTD_SIP_EVNT_RCC_HIT);
> +VTD_SIP_SHOW(iotlb_4k_miss, VTD_SIP_EVNT_IOTLB_4K_MISS);
> +VTD_SIP_SHOW(iotlb_2m_miss, VTD_SIP_EVNT_IOTLB_2M_MISS);
> +VTD_SIP_SHOW(iotlb_1g_miss, VTD_SIP_EVNT_IOTLB_1G_MISS);
> +VTD_SIP_SHOW(slpwc_l3_miss, VTD_SIP_EVNT_SLPWC_L3_MISS);
> +VTD_SIP_SHOW(slpwc_l4_miss, VTD_SIP_EVNT_SLPWC_L4_MISS);
> +VTD_SIP_SHOW(rcc_miss, VTD_SIP_EVNT_RCC_MISS);
> +
> +static struct attribute *iommu_sip_attrs[] = {
> + &perf_obj_attr_iotlb_4k_hit.attr,
> + &perf_obj_attr_iotlb_2m_hit.attr,
> + &perf_obj_attr_iotlb_1g_hit.attr,
> + &perf_obj_attr_slpwc_l3_hit.attr,
> + &perf_obj_attr_slpwc_l4_hit.attr,
> + &perf_obj_attr_rcc_hit.attr,
> + &perf_obj_attr_iotlb_4k_miss.attr,
> + &perf_obj_attr_iotlb_2m_miss.attr,
> + &perf_obj_attr_iotlb_1g_miss.attr,
> + &perf_obj_attr_slpwc_l3_miss.attr,
> + &perf_obj_attr_slpwc_l4_miss.attr,
> + &perf_obj_attr_rcc_miss.attr,
> + NULL,
> +};
> +
> +static struct attribute_group iommu_sip_attr_group = {
> + .attrs = iommu_sip_attrs,
> +};
> +
> +static const struct attribute_group *iommu_top_attr_groups[] = {
> + &iommu_top_attr_group,
> + &iommu_sip_attr_group,
> + NULL,
> +};
> +
> +static ssize_t read_iommu_counter(struct perf_object *pobj, u8 event, char *buf)
> +{
> + struct dfl_feature *feature = pobj->feature;
> + struct dfl_feature_platform_data *pdata;
> + void __iomem *base = feature->ioaddr;
> + u64 v, count;
> +
> + if (event > VTD_EVNT_MAX)
> + return -EINVAL;
> +
> + event += pobj->id;
> + pdata = dev_get_platdata(&feature->pdev->dev);
> +
> + mutex_lock(&pdata->lock);
> + v = readq(base + VTD_CTRL);
> + v &= ~VTD_CTRL_EVNT;
> + v |= FIELD_PREP(VTD_CTRL_EVNT, event);
> + writeq(v, base + VTD_CTRL);
> +
> + if (readq_poll_timeout(base + VTD_CNTR, v,
> + FIELD_GET(VTD_CNTR_EVNT, v) == event, 1,
> + PERF_TIMEOUT)) {
> + dev_err(&feature->pdev->dev, "timeout, unmatched VTd event type in counter registers\n");
> + mutex_unlock(&pdata->lock);
> + return -ETIMEDOUT;
> + }
> +
> + v = readq(base + VTD_CNTR);
> + count = FIELD_GET(VTD_CNTR_EVNT_CNTR, v);
> + mutex_unlock(&pdata->lock);
> +
> + return scnprintf(buf, PAGE_SIZE, "0x%llx\n", (unsigned long long)count);
> +}
> +
> +#define VTD_SHOW(name, base_event) \
> +static ssize_t name##_show(struct perf_object *pobj, char *buf) \
> +{ \
> + return read_iommu_counter(pobj, base_event, buf); \
> +} \
> +static PERF_OBJ_ATTR_RO(name)
> +
> +VTD_SHOW(read_transaction, VTD_EVNT_AFU_MEM_RD_TRANS);
> +VTD_SHOW(write_transaction, VTD_EVNT_AFU_MEM_WR_TRANS);
> +VTD_SHOW(devtlb_read_hit, VTD_EVNT_AFU_DEVTLB_RD_HIT);
> +VTD_SHOW(devtlb_write_hit, VTD_EVNT_AFU_DEVTLB_WR_HIT);
> +VTD_SHOW(devtlb_4k_fill, VTD_EVNT_DEVTLB_4K_FILL);
> +VTD_SHOW(devtlb_2m_fill, VTD_EVNT_DEVTLB_2M_FILL);
> +VTD_SHOW(devtlb_1g_fill, VTD_EVNT_DEVTLB_1G_FILL);
> +
> +static struct attribute *iommu_attrs[] = {
> + &perf_obj_attr_read_transaction.attr,
> + &perf_obj_attr_write_transaction.attr,
> + &perf_obj_attr_devtlb_read_hit.attr,
> + &perf_obj_attr_devtlb_write_hit.attr,
> + &perf_obj_attr_devtlb_4k_fill.attr,
> + &perf_obj_attr_devtlb_2m_fill.attr,
> + &perf_obj_attr_devtlb_1g_fill.attr,
> + NULL,
> +};
> +
> +static struct attribute_group iommu_attr_group = {
> + .attrs = iommu_attrs,
> +};
> +
> +static const struct attribute_group *iommu_attr_groups[] = {
> + &iommu_attr_group,
> + NULL,
> +};
> +
> +#define PERF_MAX_PORT_NUM 1
> +
> +static int create_perf_iommu_obj(struct perf_object *perf_dev)
> +{
> + struct dfl_feature *feature = perf_dev->feature;
> + struct device *dev = &feature->pdev->dev;
> + struct perf_object *pobj, *obj;
> + void __iomem *base;
> + u64 v;
> + int i;
> +
> + /* check if iommu is not supported on this device. */
> + base = dfl_get_feature_ioaddr_by_id(dev, FME_FEATURE_ID_HEADER);
> + v = readq(base + FME_HDR_CAP);
> + if (!FIELD_GET(FME_CAP_IOMMU_AVL, v))
> + return 0;
> +
> + pobj = create_perf_obj(feature, &perf_dev->kobj, PERF_OBJ_ROOT_ID,
> + iommu_top_attr_groups, "iommu");
> + if (IS_ERR(pobj))
> + return PTR_ERR(pobj);
> +
> + list_add(&pobj->node, &perf_dev->children);
> +
> + for (i = 0; i < PERF_MAX_PORT_NUM; i++) {
> + obj = create_perf_obj(feature, &pobj->kobj, i,
> + iommu_attr_groups, "afu");
> + if (IS_ERR(obj))
> + return PTR_ERR(obj);
> +
> + list_add(&obj->node, &pobj->children);
> + }
> +
> + return 0;
> +}
> +
> +/*
> + * Counter Sysfs Interfaces for Fabric
> + */
> +static bool fabric_pobj_is_enabled(struct perf_object *pobj)
> +{
> + struct dfl_feature *feature = pobj->feature;
> + void __iomem *base = feature->ioaddr;
> + u64 v;
> +
> + v = readq(base + FAB_CTRL);
> +
> + if (FIELD_GET(FAB_PORT_FILTER, v) == FAB_PORT_FILTER_DISABLE)
> + return pobj->id == PERF_OBJ_ROOT_ID;
> +
> + return pobj->id == FIELD_GET(FAB_PORT_ID, v);
> +}
> +
> +static ssize_t read_fabric_counter(struct perf_object *pobj,
> + u8 event, char *buf)
> +{
> + struct dfl_feature *feature = pobj->feature;
> + struct dfl_feature_platform_data *pdata;
> + void __iomem *base = feature->ioaddr;
> + u64 v, count = 0;
> +
> + if (event > FAB_EVNT_MAX)
> + return -EINVAL;
> +
> + pdata = dev_get_platdata(&feature->pdev->dev);
> +
> + mutex_lock(&pdata->lock);
> + /* if it is disabled, force the counter to return zero. */
> + if (!fabric_pobj_is_enabled(pobj))
> + goto exit;
> +
> + v = readq(base + FAB_CTRL);
> + v &= ~FAB_CTRL_EVNT;
> + v |= FIELD_PREP(FAB_CTRL_EVNT, event);
> + writeq(v, base + FAB_CTRL);
> +
> + if (readq_poll_timeout(base + FAB_CNTR, v,
> + FIELD_GET(FAB_CNTR_EVNT, v) == event,
> + 1, PERF_TIMEOUT)) {
> + dev_err(&feature->pdev->dev, "timeout, unmatched fab event type in counter registers.\n");
> + mutex_unlock(&pdata->lock);
> + return -ETIMEDOUT;
> + }
> +
> + v = readq(base + FAB_CNTR);
> + count = FIELD_GET(FAB_CNTR_EVNT_CNTR, v);
> +exit:
> + mutex_unlock(&pdata->lock);
> + return scnprintf(buf, PAGE_SIZE, "0x%llx\n", (unsigned long long)count);
> +}
> +
> +#define FAB_SHOW(name, event) \
> +static ssize_t name##_show(struct perf_object *pobj, char *buf) \
> +{ \
> + return read_fabric_counter(pobj, event, buf); \
> +} \
> +static PERF_OBJ_ATTR_RO(name)
> +
> +FAB_SHOW(pcie0_read, FAB_EVNT_PCIE0_RD);
> +FAB_SHOW(pcie0_write, FAB_EVNT_PCIE0_WR);
> +FAB_SHOW(pcie1_read, FAB_EVNT_PCIE1_RD);
> +FAB_SHOW(pcie1_write, FAB_EVNT_PCIE1_WR);
> +FAB_SHOW(upi_read, FAB_EVNT_UPI_RD);
> +FAB_SHOW(upi_write, FAB_EVNT_UPI_WR);
> +FAB_SHOW(mmio_read, FAB_EVNT_MMIO_RD);
> +FAB_SHOW(mmio_write, FAB_EVNT_MMIO_WR);
> +
> +static ssize_t fab_enable_show(struct perf_object *pobj, char *buf)
> +{
> + return scnprintf(buf, PAGE_SIZE, "%u\n",
> + (unsigned int)!!fabric_pobj_is_enabled(pobj));
> +}
> +
> +/*
> + * If enable one port or all port event counter in fabric, other
> + * fabric event counter originally enabled will be disable automatically.
> + */
> +static ssize_t fab_enable_store(struct perf_object *pobj,
> + const char *buf, size_t n)
> +{
> + struct dfl_feature *feature = pobj->feature;
> + struct dfl_feature_platform_data *pdata;
> + void __iomem *base = feature->ioaddr;
> + bool state;
> + u64 v;
> +
> + if (strtobool(buf, &state) || !state)
> + return -EINVAL;
> +
> + pdata = dev_get_platdata(&feature->pdev->dev);
> +
> + /* if it is already enabled. */
> + if (fabric_pobj_is_enabled(pobj))
> + return n;
> +
> + mutex_lock(&pdata->lock);
> + v = readq(base + FAB_CTRL);
> + v &= ~(FAB_PORT_FILTER | FAB_PORT_ID);
> +
> + if (pobj->id == PERF_OBJ_ROOT_ID) {
> + v |= FIELD_PREP(FAB_PORT_FILTER, FAB_PORT_FILTER_DISABLE);
> + } else {
> + v |= FIELD_PREP(FAB_PORT_FILTER, FAB_PORT_FILTER_ENABLE);
> + v |= FIELD_PREP(FAB_PORT_ID, pobj->id);
> + }
> + writeq(v, base + FAB_CTRL);
> + mutex_unlock(&pdata->lock);
> +
> + return n;
> +}
> +static PERF_OBJ_ATTR(fab_enable, enable, 0644,
> + fab_enable_show, fab_enable_store);
> +
> +static struct attribute *fabric_attrs[] = {
> + &perf_obj_attr_pcie0_read.attr,
> + &perf_obj_attr_pcie0_write.attr,
> + &perf_obj_attr_pcie1_read.attr,
> + &perf_obj_attr_pcie1_write.attr,
> + &perf_obj_attr_upi_read.attr,
> + &perf_obj_attr_upi_write.attr,
> + &perf_obj_attr_mmio_read.attr,
> + &perf_obj_attr_mmio_write.attr,
> + &perf_obj_attr_fab_enable.attr,
> + NULL,
> +};
> +
> +static struct attribute_group fabric_attr_group = {
> + .attrs = fabric_attrs,
> +};
> +
> +static const struct attribute_group *fabric_attr_groups[] = {
> + &fabric_attr_group,
> + NULL,
> +};
> +
> +static ssize_t fab_freeze_show(struct perf_object *pobj, char *buf)
> +{
> + void __iomem *base = pobj->feature->ioaddr;
> + u64 v;
> +
> + v = readq(base + FAB_CTRL);
> +
> + return scnprintf(buf, PAGE_SIZE, "%u\n",
> + (unsigned int)FIELD_GET(FAB_FREEZE_CNTR, v));
> +}
> +
> +static ssize_t fab_freeze_store(struct perf_object *pobj,
> + const char *buf, size_t n)
> +{
> + struct dfl_feature *feature = pobj->feature;
> + struct dfl_feature_platform_data *pdata;
> + void __iomem *base = feature->ioaddr;
> + bool state;
> + u64 v;
> +
> + if (strtobool(buf, &state))
> + return -EINVAL;
> +
> + pdata = dev_get_platdata(&feature->pdev->dev);
> +
> + mutex_lock(&pdata->lock);
> + v = readq(base + FAB_CTRL);
> + v &= ~FAB_FREEZE_CNTR;
> + v |= FIELD_PREP(FAB_FREEZE_CNTR, state ? 1 : 0);
> + writeq(v, base + FAB_CTRL);
> + mutex_unlock(&pdata->lock);
> +
> + return n;
> +}
> +static PERF_OBJ_ATTR(fab_freeze, freeze, 0644,
> + fab_freeze_show, fab_freeze_store);
PERF_OBJ_ATTR_RW ? Also in a few other places, wherever '0644' shows up.
> +
> +static struct attribute *fabric_top_attrs[] = {
> + &perf_obj_attr_fab_freeze.attr,
> + NULL,
> +};
> +
> +static struct attribute_group fabric_top_attr_group = {
> + .attrs = fabric_top_attrs,
> +};
> +
> +static const struct attribute_group *fabric_top_attr_groups[] = {
> + &fabric_attr_group,
> + &fabric_top_attr_group,
> + NULL,
> +};
> +
> +static int create_perf_fabric_obj(struct perf_object *perf_dev)
> +{
> + struct perf_object *pobj, *obj;
> + int i;
> +
> + pobj = create_perf_obj(perf_dev->feature, &perf_dev->kobj,
> + PERF_OBJ_ROOT_ID, fabric_top_attr_groups,
> + "fabric");
> + if (IS_ERR(pobj))
> + return PTR_ERR(pobj);
> +
> + list_add(&pobj->node, &perf_dev->children);
> +
> + for (i = 0; i < PERF_MAX_PORT_NUM; i++) {
> + obj = create_perf_obj(perf_dev->feature, &pobj->kobj, i,
> + fabric_attr_groups, "port");
> + if (IS_ERR(obj))
> + return PTR_ERR(obj);
> +
> + list_add(&obj->node, &pobj->children);
> + }
> +
> + return 0;
> +}
> +
> +static int fme_perf_init(struct platform_device *pdev,
> + struct dfl_feature *feature)
> +{
> + struct perf_object *perf_dev;
> + int ret;
> +
> + perf_dev = create_perf_dev(feature);
> + if (IS_ERR(perf_dev))
> + return PTR_ERR(perf_dev);
> +
> + ret = create_perf_fabric_obj(perf_dev);
> + if (ret)
> + goto done;
> +
> + if (feature->id == FME_FEATURE_ID_GLOBAL_IPERF) {
> + /*
> + * Cache and IOMMU(VT-D) performance counters are not supported
> + * on discreted solutions e.g. Intel Programmable Acceleration
> + * Card based on PCIe.
> + */
> + ret = create_perf_cache_obj(perf_dev);
> + if (ret)
> + goto done;
> +
> + ret = create_perf_iommu_obj(perf_dev);
> + if (ret)
> + goto done;
> + }
> +
> + feature->priv = perf_dev;
> + return 0;
> +
> +done:
> + destroy_perf_obj(perf_dev);
> + return ret;
> +}
> +
> +static void fme_perf_uinit(struct platform_device *pdev,
> + struct dfl_feature *feature)
> +{
> + struct perf_object *perf_dev = feature->priv;
> +
> + destroy_perf_obj(perf_dev);
> +}
> +
> +const struct dfl_feature_id fme_perf_id_table[] = {
> + {.id = FME_FEATURE_ID_GLOBAL_IPERF,},
> + {.id = FME_FEATURE_ID_GLOBAL_DPERF,},
> + {0,}
> +};
> +
> +const struct dfl_feature_ops fme_perf_ops = {
> + .init = fme_perf_init,
> + .uinit = fme_perf_uinit,
> +};
> diff --git a/drivers/fpga/dfl-fme.h b/drivers/fpga/dfl-fme.h
> index 5fbe3f5..dc71048 100644
> --- a/drivers/fpga/dfl-fme.h
> +++ b/drivers/fpga/dfl-fme.h
> @@ -39,5 +39,7 @@ struct dfl_fme {
> extern const struct dfl_feature_id fme_pr_mgmt_id_table[];
> extern const struct dfl_feature_ops fme_global_err_ops;
> extern const struct dfl_feature_id fme_global_err_id_table[];
> +extern const struct dfl_feature_ops fme_perf_ops;
> +extern const struct dfl_feature_id fme_perf_id_table[];
>
> #endif /* __DFL_FME_H */
> diff --git a/drivers/fpga/dfl.c b/drivers/fpga/dfl.c
> index 65f91ef..637692a 100644
> --- a/drivers/fpga/dfl.c
> +++ b/drivers/fpga/dfl.c
> @@ -507,6 +507,7 @@ static int build_info_commit_dev(struct build_feature_devs_info *binfo)
> struct dfl_feature *feature = &pdata->features[index];
>
> /* save resource information for each feature */
> + feature->pdev = fdev;
> feature->id = finfo->fid;
> feature->resource_index = index;
> feature->ioaddr = finfo->ioaddr;
> diff --git a/drivers/fpga/dfl.h b/drivers/fpga/dfl.h
> index 6c32080..bf23436 100644
> --- a/drivers/fpga/dfl.h
> +++ b/drivers/fpga/dfl.h
> @@ -191,6 +191,7 @@ struct dfl_feature_driver {
> /**
> * struct dfl_feature - sub feature of the feature devices
> *
> + * @pdev: parent platform device.
> * @id: sub feature id.
> * @resource_index: each sub feature has one mmio resource for its registers.
> * this index is used to find its mmio resource from the
> @@ -200,6 +201,7 @@ struct dfl_feature_driver {
> * @priv: priv data of this feature.
> */
> struct dfl_feature {
> + struct platform_device *pdev;
> u64 id;
> int resource_index;
> void __iomem *ioaddr;
> --
> 1.8.3.1
>
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