1/* 2 * Copyright (c) 2023 Huawei Device Co., Ltd. 3 * Licensed under the Apache License, Version 2.0 (the "License"); 4 * you may not use this file except in compliance with the License. 5 * You may obtain a copy of the License at 6 * 7 * http://www.apache.org/licenses/LICENSE-2.0 8 * 9 * Unless required by applicable law or agreed to in writing, software 10 * distributed under the License is distributed on an "AS IS" BASIS, 11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 12 * See the License for the specific language governing permissions and 13 * limitations under the License. 14 */ 15 16#ifndef _UAPI_LINUX_WGCM_H 17#define _UAPI_LINUX_WGCM_H 18 19#include <linux/types.h> 20 21constexpr int WGCM_TASK_ALIGN = 64; 22 23constexpr int WGCM_ACTIVELY_WAKE = 0x10; 24constexpr int PR_WGCM_CTL = 59; 25/* 26 * struct wgcm_workergrp_data: controls the state of WGCM tasks. 27 * 28 * The struct is aligned at 64 bytes to ensure that it fits into 29 * a single cache line. 30 */ 31struct wgcm_workergrp_data { 32 /* wgcm workergroup's id */ 33 __u32 gid; 34 35 /* server's thread id */ 36 __u32 server_tid; 37 38 /* 39 * min_concur_workers & max_workers_sum: 40 * These two paras are used to detemine wether to wake up the server. 41 * 42 * When (workers_sum - blk_workers_sum < min_concur_workers) && 43 * (workers_sum < max_workers_sum), wake up server. 44 */ 45 __u32 min_concur_workers; 46 __u32 max_workers_sum; 47 48 /* count the number of workers which is bound with server */ 49 __u32 workers_sum; 50 51 /* count the number of block workers */ 52 __u32 blk_workers_sum; 53 54 /* indicates whether the server task is actively woken up */ 55 __u32 woken_flag; 56 57 __u32 reserved; 58} __attribute__((packed, aligned(WGCM_TASK_ALIGN))); 59 60/** 61 * enum wgcm_ctl_flag - flags to pass to wgcm_ctl() 62 * @WGCM_CTL_SERVER_REG: register the current task as a WGCM server 63 * @WGCM_CTL_WORKER_REG: register the current task as a WGCM worker 64 * @WGCM_CTL_UNREGISTER: unregister the current task as a WGCM task 65 * @WGCM_CTL_GET: get infomation about workergroup 66 * @WGCM_CTL_SET_GRP: set min_concur_workers & max_workers_sum to workergroup 67 * @WGCM_CTL_WAIT: server thread enter the hibernation state 68 * @WGCM_CTL_WAKE: actively wakes up WGCM server 69 */ 70enum wgcm_ctl_flag { 71 WGCM_CTL_SERVER_REG = 1, 72 WGCM_CTL_WORKER_REG, 73 WGCM_CTL_SET_GRP, 74 WGCM_CTL_UNREGISTER, 75 WGCM_CTL_GET = 5, 76 WGCM_CTL_WAIT, 77 WGCM_CTL_WAKE, 78 WGCM_CTL_MAX_NR, 79}; 80 81#endif /* _UAPI_LINUX_WGCM_H */ 82