linux/drivers/gpu/drm/xe/xe_device_sysfs.c

// SPDX-License-Identifier: MIT
/*
 * Copyright © 2023 Intel Corporation
 */

#include <linux/kobject.h>
#include <linux/pci.h>
#include <linux/sysfs.h>

#include <drm/drm_managed.h>

#include "xe_device.h"
#include "xe_device_sysfs.h"
#include "xe_pm.h"

/**
 * DOC: Xe device sysfs
 * Xe driver requires exposing certain tunable knobs controlled by user space for
 * each graphics device. Considering this, we need to add sysfs attributes at device
 * level granularity.
 * These sysfs attributes will be available under pci device kobj directory.
 *
 * vram_d3cold_threshold - Report/change vram used threshold(in MB) below
 * which vram save/restore is permissible during runtime D3cold entry/exit.
 */

static ssize_t
vram_d3cold_threshold_show(struct device *dev,
			   struct device_attribute *attr, char *buf)
{ … }

static ssize_t
vram_d3cold_threshold_store(struct device *dev, struct device_attribute *attr,
			    const char *buff, size_t count)
{ … }

static DEVICE_ATTR_RW(vram_d3cold_threshold);

static void xe_device_sysfs_fini(void *arg)
{ … }

int xe_device_sysfs_init(struct xe_device *xe)
{ … }