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// SPDX-License-Identifier: MIT
/*
* Copyright © 2023 Intel Corporation
*/
#include <drm/drm_managed.h>
#include <regs/xe_gt_regs.h>
#include "xe_device.h"
#include "xe_gt.h"
#include "xe_gt_sysfs.h"
#include "xe_gt_throttle_sysfs.h"
#include "xe_mmio.h"
/**
* DOC: Xe GT Throttle
*
* Provides sysfs entries for frequency throttle reasons in GT
*
* device/gt#/freq0/throttle/status - Overall status
* device/gt#/freq0/throttle/reason_pl1 - Frequency throttle due to PL1
* device/gt#/freq0/throttle/reason_pl2 - Frequency throttle due to PL2
* device/gt#/freq0/throttle/reason_pl4 - Frequency throttle due to PL4, Iccmax etc.
* device/gt#/freq0/throttle/reason_thermal - Frequency throttle due to thermal
* device/gt#/freq0/throttle/reason_prochot - Frequency throttle due to prochot
* device/gt#/freq0/throttle/reason_ratl - Frequency throttle due to RATL
* device/gt#/freq0/throttle/reason_vr_thermalert - Frequency throttle due to VR THERMALERT
* device/gt#/freq0/throttle/reason_vr_tdc - Frequency throttle due to VR TDC
*/
static struct xe_gt *
dev_to_gt(struct device *dev)
{
return kobj_to_gt(dev->kobj.parent);
}
static u32 read_perf_limit_reasons(struct xe_gt *gt)
{
u32 reg;
if (xe_gt_is_media_type(gt))
reg = xe_mmio_read32(gt, MTL_MEDIA_PERF_LIMIT_REASONS);
else
reg = xe_mmio_read32(gt, GT0_PERF_LIMIT_REASONS);
return reg;
}
static u32 read_status(struct xe_gt *gt)
{
u32 status = read_perf_limit_reasons(gt) & GT0_PERF_LIMIT_REASONS_MASK;
return status;
}
static u32 read_reason_pl1(struct xe_gt *gt)
{
u32 pl1 = read_perf_limit_reasons(gt) & POWER_LIMIT_1_MASK;
return pl1;
}
static u32 read_reason_pl2(struct xe_gt *gt)
{
u32 pl2 = read_perf_limit_reasons(gt) & POWER_LIMIT_2_MASK;
return pl2;
}
static u32 read_reason_pl4(struct xe_gt *gt)
{
u32 pl4 = read_perf_limit_reasons(gt) & POWER_LIMIT_4_MASK;
return pl4;
}
static u32 read_reason_thermal(struct xe_gt *gt)
{
u32 thermal = read_perf_limit_reasons(gt) & THERMAL_LIMIT_MASK;
return thermal;
}
static u32 read_reason_prochot(struct xe_gt *gt)
{
u32 prochot = read_perf_limit_reasons(gt) & PROCHOT_MASK;
return prochot;
}
static u32 read_reason_ratl(struct xe_gt *gt)
{
u32 ratl = read_perf_limit_reasons(gt) & RATL_MASK;
return ratl;
}
static u32 read_reason_vr_thermalert(struct xe_gt *gt)
{
u32 thermalert = read_perf_limit_reasons(gt) & VR_THERMALERT_MASK;
return thermalert;
}
static u32 read_reason_vr_tdc(struct xe_gt *gt)
{
u32 tdc = read_perf_limit_reasons(gt) & VR_TDC_MASK;
return tdc;
}
static ssize_t status_show(struct device *dev,
struct device_attribute *attr,
char *buff)
{
struct xe_gt *gt = dev_to_gt(dev);
bool status = !!read_status(gt);
return sysfs_emit(buff, "%u\n", status);
}
static DEVICE_ATTR_RO(status);
static ssize_t reason_pl1_show(struct device *dev,
struct device_attribute *attr,
char *buff)
{
struct xe_gt *gt = dev_to_gt(dev);
bool pl1 = !!read_reason_pl1(gt);
return sysfs_emit(buff, "%u\n", pl1);
}
static DEVICE_ATTR_RO(reason_pl1);
static ssize_t reason_pl2_show(struct device *dev,
struct device_attribute *attr,
char *buff)
{
struct xe_gt *gt = dev_to_gt(dev);
bool pl2 = !!read_reason_pl2(gt);
return sysfs_emit(buff, "%u\n", pl2);
}
static DEVICE_ATTR_RO(reason_pl2);
static ssize_t reason_pl4_show(struct device *dev,
struct device_attribute *attr,
char *buff)
{
struct xe_gt *gt = dev_to_gt(dev);
bool pl4 = !!read_reason_pl4(gt);
return sysfs_emit(buff, "%u\n", pl4);
}
static DEVICE_ATTR_RO(reason_pl4);
static ssize_t reason_thermal_show(struct device *dev,
struct device_attribute *attr,
char *buff)
{
struct xe_gt *gt = dev_to_gt(dev);
bool thermal = !!read_reason_thermal(gt);
return sysfs_emit(buff, "%u\n", thermal);
}
static DEVICE_ATTR_RO(reason_thermal);
static ssize_t reason_prochot_show(struct device *dev,
struct device_attribute *attr,
char *buff)
{
struct xe_gt *gt = dev_to_gt(dev);
bool prochot = !!read_reason_prochot(gt);
return sysfs_emit(buff, "%u\n", prochot);
}
static DEVICE_ATTR_RO(reason_prochot);
static ssize_t reason_ratl_show(struct device *dev,
struct device_attribute *attr,
char *buff)
{
struct xe_gt *gt = dev_to_gt(dev);
bool ratl = !!read_reason_ratl(gt);
return sysfs_emit(buff, "%u\n", ratl);
}
static DEVICE_ATTR_RO(reason_ratl);
static ssize_t reason_vr_thermalert_show(struct device *dev,
struct device_attribute *attr,
char *buff)
{
struct xe_gt *gt = dev_to_gt(dev);
bool thermalert = !!read_reason_vr_thermalert(gt);
return sysfs_emit(buff, "%u\n", thermalert);
}
static DEVICE_ATTR_RO(reason_vr_thermalert);
static ssize_t reason_vr_tdc_show(struct device *dev,
struct device_attribute *attr,
char *buff)
{
struct xe_gt *gt = dev_to_gt(dev);
bool tdc = !!read_reason_vr_tdc(gt);
return sysfs_emit(buff, "%u\n", tdc);
}
static DEVICE_ATTR_RO(reason_vr_tdc);
static struct attribute *throttle_attrs[] = {
&dev_attr_status.attr,
&dev_attr_reason_pl1.attr,
&dev_attr_reason_pl2.attr,
&dev_attr_reason_pl4.attr,
&dev_attr_reason_thermal.attr,
&dev_attr_reason_prochot.attr,
&dev_attr_reason_ratl.attr,
&dev_attr_reason_vr_thermalert.attr,
&dev_attr_reason_vr_tdc.attr,
NULL
};
static const struct attribute_group throttle_group_attrs = {
.name = "throttle",
.attrs = throttle_attrs,
};
static void gt_throttle_sysfs_fini(struct drm_device *drm, void *arg)
{
struct xe_gt *gt = arg;
sysfs_remove_group(gt->freq, &throttle_group_attrs);
}
void xe_gt_throttle_sysfs_init(struct xe_gt *gt)
{
struct xe_device *xe = gt_to_xe(gt);
int err;
err = sysfs_create_group(gt->freq, &throttle_group_attrs);
if (err) {
drm_warn(&xe->drm, "failed to register throttle sysfs, err: %d\n", err);
return;
}
err = drmm_add_action_or_reset(&xe->drm, gt_throttle_sysfs_fini, gt);
if (err)
drm_warn(&xe->drm, "%s: drmm_add_action_or_reset failed, err: %d\n",
__func__, err);
}
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