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

// SPDX-License-Identifier: MIT
/*
 * Copyright © 2023-2024 Intel Corporation
 */

#include <linux/errno.h>
#include <linux/sysctl.h>

#include <drm/xe_drm.h>

#include "xe_oa.h"
#include "xe_observation.h"

u32 xe_observation_paranoid = …;
static struct ctl_table_header *sysctl_header;

static int xe_oa_ioctl(struct drm_device *dev, struct drm_xe_observation_param *arg,
		       struct drm_file *file)
{ … }

/**
 * xe_observation_ioctl - The top level observation layer ioctl
 * @dev: @drm_device
 * @data: pointer to struct @drm_xe_observation_param
 * @file: @drm_file
 *
 * The function is called for different observation streams types and
 * allows execution of different operations supported by those stream
 * types.
 *
 * Return: 0 on success or a negative error code on failure.
 */
int xe_observation_ioctl(struct drm_device *dev, void *data, struct drm_file *file)
{ … }

static struct ctl_table observation_ctl_table[] = …;

/**
 * xe_observation_sysctl_register - Register xe_observation_paranoid sysctl
 *
 * Normally only superuser/root can access observation stream
 * data. However, superuser can set xe_observation_paranoid sysctl to 0 to
 * allow non-privileged users to also access observation data.
 *
 * Return: always returns 0
 */
int xe_observation_sysctl_register(void)
{ … }

/**
 * xe_observation_sysctl_unregister - Unregister xe_observation_paranoid sysctl
 */
void xe_observation_sysctl_unregister(void)
{ … }