93 lines
2.3 KiB
C
93 lines
2.3 KiB
C
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// SPDX-License-Identifier: MIT
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/*
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* Copyright © 2023-2024 Intel Corporation
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*/
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#include <linux/errno.h>
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#include <linux/sysctl.h>
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#include <uapi/drm/xe_drm.h>
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#include "xe_oa.h"
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#include "xe_observation.h"
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u32 xe_observation_paranoid = true;
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static struct ctl_table_header *sysctl_header;
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static int xe_oa_ioctl(struct drm_device *dev, struct drm_xe_observation_param *arg,
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struct drm_file *file)
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{
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switch (arg->observation_op) {
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case DRM_XE_OBSERVATION_OP_STREAM_OPEN:
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return xe_oa_stream_open_ioctl(dev, arg->param, file);
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case DRM_XE_OBSERVATION_OP_ADD_CONFIG:
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return xe_oa_add_config_ioctl(dev, arg->param, file);
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case DRM_XE_OBSERVATION_OP_REMOVE_CONFIG:
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return xe_oa_remove_config_ioctl(dev, arg->param, file);
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default:
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return -EINVAL;
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}
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}
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/**
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* xe_observation_ioctl - The top level observation layer ioctl
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* @dev: @drm_device
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* @data: pointer to struct @drm_xe_observation_param
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* @file: @drm_file
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*
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* The function is called for different observation streams types and
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* allows execution of different operations supported by those stream
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* types.
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*
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* Return: 0 on success or a negative error code on failure.
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*/
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int xe_observation_ioctl(struct drm_device *dev, void *data, struct drm_file *file)
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{
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struct drm_xe_observation_param *arg = data;
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if (arg->extensions)
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return -EINVAL;
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switch (arg->observation_type) {
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case DRM_XE_OBSERVATION_TYPE_OA:
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return xe_oa_ioctl(dev, arg, file);
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default:
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return -EINVAL;
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}
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}
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static struct ctl_table observation_ctl_table[] = {
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{
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.procname = "observation_paranoid",
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.data = &xe_observation_paranoid,
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.maxlen = sizeof(xe_observation_paranoid),
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.mode = 0644,
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.proc_handler = proc_dointvec_minmax,
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.extra1 = SYSCTL_ZERO,
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.extra2 = SYSCTL_ONE,
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},
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};
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/**
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* xe_observation_sysctl_register - Register xe_observation_paranoid sysctl
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*
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* Normally only superuser/root can access observation stream
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* data. However, superuser can set xe_observation_paranoid sysctl to 0 to
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* allow non-privileged users to also access observation data.
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*
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* Return: always returns 0
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*/
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int xe_observation_sysctl_register(void)
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{
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sysctl_header = register_sysctl("dev/xe", observation_ctl_table);
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return 0;
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}
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/**
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* xe_observation_sysctl_unregister - Unregister xe_observation_paranoid sysctl
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*/
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void xe_observation_sysctl_unregister(void)
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{
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unregister_sysctl_table(sysctl_header);
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}
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