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1// SPDX-License-Identifier: MIT2/*3 * Copyright © 2023-2024 Intel Corporation4 */5 6#include <linux/errno.h>7#include <linux/sysctl.h>8 9#include <uapi/drm/xe_drm.h>10 11#include "xe_oa.h"12#include "xe_observation.h"13 14u32 xe_observation_paranoid = true;15static struct ctl_table_header *sysctl_header;16 17static int xe_oa_ioctl(struct drm_device *dev, struct drm_xe_observation_param *arg,18 struct drm_file *file)19{20 switch (arg->observation_op) {21 case DRM_XE_OBSERVATION_OP_STREAM_OPEN:22 return xe_oa_stream_open_ioctl(dev, arg->param, file);23 case DRM_XE_OBSERVATION_OP_ADD_CONFIG:24 return xe_oa_add_config_ioctl(dev, arg->param, file);25 case DRM_XE_OBSERVATION_OP_REMOVE_CONFIG:26 return xe_oa_remove_config_ioctl(dev, arg->param, file);27 default:28 return -EINVAL;29 }30}31 32/**33 * xe_observation_ioctl - The top level observation layer ioctl34 * @dev: @drm_device35 * @data: pointer to struct @drm_xe_observation_param36 * @file: @drm_file37 *38 * The function is called for different observation streams types and39 * allows execution of different operations supported by those stream40 * types.41 *42 * Return: 0 on success or a negative error code on failure.43 */44int xe_observation_ioctl(struct drm_device *dev, void *data, struct drm_file *file)45{46 struct drm_xe_observation_param *arg = data;47 48 if (arg->extensions)49 return -EINVAL;50 51 switch (arg->observation_type) {52 case DRM_XE_OBSERVATION_TYPE_OA:53 return xe_oa_ioctl(dev, arg, file);54 default:55 return -EINVAL;56 }57}58 59static struct ctl_table observation_ctl_table[] = {60 {61 .procname = "observation_paranoid",62 .data = &xe_observation_paranoid,63 .maxlen = sizeof(xe_observation_paranoid),64 .mode = 0644,65 .proc_handler = proc_dointvec_minmax,66 .extra1 = SYSCTL_ZERO,67 .extra2 = SYSCTL_ONE,68 },69};70 71/**72 * xe_observation_sysctl_register - Register xe_observation_paranoid sysctl73 *74 * Normally only superuser/root can access observation stream75 * data. However, superuser can set xe_observation_paranoid sysctl to 0 to76 * allow non-privileged users to also access observation data.77 *78 * Return: always returns 079 */80int xe_observation_sysctl_register(void)81{82 sysctl_header = register_sysctl("dev/xe", observation_ctl_table);83 return 0;84}85 86/**87 * xe_observation_sysctl_unregister - Unregister xe_observation_paranoid sysctl88 */89void xe_observation_sysctl_unregister(void)90{91 unregister_sysctl_table(sysctl_header);92}93