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// 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 = true;
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)
{
switch (arg->observation_op) {
case DRM_XE_OBSERVATION_OP_STREAM_OPEN:
return xe_oa_stream_open_ioctl(dev, arg->param, file);
case DRM_XE_OBSERVATION_OP_ADD_CONFIG:
return xe_oa_add_config_ioctl(dev, arg->param, file);
case DRM_XE_OBSERVATION_OP_REMOVE_CONFIG:
return xe_oa_remove_config_ioctl(dev, arg->param, file);
default:
return -EINVAL;
}
}
/**
* 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)
{
struct drm_xe_observation_param *arg = data;
if (arg->extensions)
return -EINVAL;
switch (arg->observation_type) {
case DRM_XE_OBSERVATION_TYPE_OA:
return xe_oa_ioctl(dev, arg, file);
default:
return -EINVAL;
}
}
static struct ctl_table observation_ctl_table[] = {
{
.procname = "observation_paranoid",
.data = &xe_observation_paranoid,
.maxlen = sizeof(xe_observation_paranoid),
.mode = 0644,
.proc_handler = proc_dointvec_minmax,
.extra1 = SYSCTL_ZERO,
.extra2 = SYSCTL_ONE,
},
{}
};
/**
* 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)
{
sysctl_header = register_sysctl("dev/xe", observation_ctl_table);
return 0;
}
/**
* xe_observation_sysctl_unregister - Unregister xe_observation_paranoid sysctl
*/
void xe_observation_sysctl_unregister(void)
{
unregister_sysctl_table(sysctl_header);
}
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