1219820Sjeff/*- 2219820Sjeff * Copyright (c) 2010 Isilon Systems, Inc. 3219820Sjeff * Copyright (c) 2010 iX Systems, Inc. 4219820Sjeff * Copyright (c) 2010 Panasas, Inc. 5299526Shselasky * Copyright (c) 2013-2016 Mellanox Technologies, Ltd. 6219820Sjeff * All rights reserved. 7219820Sjeff * 8219820Sjeff * Redistribution and use in source and binary forms, with or without 9219820Sjeff * modification, are permitted provided that the following conditions 10219820Sjeff * are met: 11219820Sjeff * 1. Redistributions of source code must retain the above copyright 12219820Sjeff * notice unmodified, this list of conditions, and the following 13219820Sjeff * disclaimer. 14219820Sjeff * 2. Redistributions in binary form must reproduce the above copyright 15219820Sjeff * notice, this list of conditions and the following disclaimer in the 16219820Sjeff * documentation and/or other materials provided with the distribution. 17219820Sjeff * 18219820Sjeff * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 19219820Sjeff * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 20219820Sjeff * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 21219820Sjeff * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 22219820Sjeff * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 23219820Sjeff * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 24219820Sjeff * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 25219820Sjeff * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 26219820Sjeff * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 27219820Sjeff * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 28289644Shselasky * 29289644Shselasky * $FreeBSD: releng/11.0/sys/compat/linuxkpi/common/include/linux/sched.h 300671 2016-05-25 09:04:06Z hselasky $ 30219820Sjeff */ 31219820Sjeff#ifndef _LINUX_SCHED_H_ 32219820Sjeff#define _LINUX_SCHED_H_ 33219820Sjeff 34219820Sjeff#include <sys/param.h> 35219820Sjeff#include <sys/systm.h> 36219820Sjeff#include <sys/proc.h> 37219820Sjeff#include <sys/sched.h> 38219820Sjeff#include <sys/sleepqueue.h> 39219820Sjeff 40219820Sjeff#define MAX_SCHEDULE_TIMEOUT LONG_MAX 41219820Sjeff 42219820Sjeff#define TASK_RUNNING 0 43219820Sjeff#define TASK_INTERRUPTIBLE 1 44219820Sjeff#define TASK_UNINTERRUPTIBLE 2 45219820Sjeff#define TASK_DEAD 64 46219820Sjeff#define TASK_WAKEKILL 128 47219820Sjeff#define TASK_WAKING 256 48219820Sjeff 49219820Sjeff#define TASK_SHOULD_STOP 1 50219820Sjeff#define TASK_STOPPED 2 51219820Sjeff 52219820Sjeff/* 53299526Shselasky * A task_struct is only provided for threads created by kthread() and 54299526Shselasky * file operation callbacks. 55299526Shselasky * 56299526Shselasky * Using these routines outside the above mentioned contexts will 57299526Shselasky * cause panics because no task_struct is assigned and td_retval[1] is 58299526Shselasky * overwritten by syscalls. 59219820Sjeff */ 60219820Sjeffstruct task_struct { 61219820Sjeff struct thread *task_thread; 62219820Sjeff int (*task_fn)(void *data); 63219820Sjeff void *task_data; 64219820Sjeff int task_ret; 65219820Sjeff int state; 66219820Sjeff int should_stop; 67299526Shselasky pid_t pid; 68299526Shselasky const char *comm; 69299530Shselasky void *bsd_ioctl_data; 70299530Shselasky unsigned bsd_ioctl_len; 71219820Sjeff}; 72219820Sjeff 73289993Shselasky#define current task_struct_get(curthread) 74289993Shselasky#define task_struct_get(x) ((struct task_struct *)(uintptr_t)(x)->td_retval[1]) 75299526Shselasky#define task_struct_fill(x, y) do { \ 76299526Shselasky (y)->task_thread = (x); \ 77299526Shselasky (y)->comm = (x)->td_name; \ 78299526Shselasky (y)->pid = (x)->td_tid; \ 79299526Shselasky} while (0) 80289993Shselasky#define task_struct_set(x, y) (x)->td_retval[1] = (uintptr_t)(y) 81219820Sjeff 82289993Shselasky/* ensure the task_struct pointer fits into the td_retval[1] field */ 83289993ShselaskyCTASSERT(sizeof(((struct thread *)0)->td_retval[1]) >= sizeof(uintptr_t)); 84289993Shselasky 85219820Sjeff#define set_current_state(x) \ 86219820Sjeff atomic_store_rel_int((volatile int *)¤t->state, (x)) 87219820Sjeff#define __set_current_state(x) current->state = (x) 88219820Sjeff 89219820Sjeff 90219820Sjeff#define schedule() \ 91219820Sjeffdo { \ 92219820Sjeff void *c; \ 93219820Sjeff \ 94300671Shselasky if (cold || SCHEDULER_STOPPED()) \ 95219820Sjeff break; \ 96219820Sjeff c = curthread; \ 97219820Sjeff sleepq_lock(c); \ 98219820Sjeff if (current->state == TASK_INTERRUPTIBLE || \ 99219820Sjeff current->state == TASK_UNINTERRUPTIBLE) { \ 100219820Sjeff sleepq_add(c, NULL, "task", SLEEPQ_SLEEP, 0); \ 101219820Sjeff sleepq_wait(c, 0); \ 102219820Sjeff } else { \ 103219820Sjeff sleepq_release(c); \ 104219820Sjeff sched_relinquish(curthread); \ 105219820Sjeff } \ 106219820Sjeff} while (0) 107219820Sjeff 108219820Sjeff#define wake_up_process(x) \ 109219820Sjeffdo { \ 110219820Sjeff int wakeup_swapper; \ 111219820Sjeff void *c; \ 112219820Sjeff \ 113219820Sjeff c = (x)->task_thread; \ 114219820Sjeff sleepq_lock(c); \ 115219820Sjeff (x)->state = TASK_RUNNING; \ 116219820Sjeff wakeup_swapper = sleepq_signal(c, SLEEPQ_SLEEP, 0, 0); \ 117219820Sjeff sleepq_release(c); \ 118219820Sjeff if (wakeup_swapper) \ 119219820Sjeff kick_proc0(); \ 120219820Sjeff} while (0) 121219820Sjeff 122219820Sjeff#define cond_resched() if (!cold) sched_relinquish(curthread) 123219820Sjeff 124219820Sjeff#define sched_yield() sched_relinquish(curthread) 125219820Sjeff 126289566Shselaskystatic inline long 127289566Shselaskyschedule_timeout(signed long timeout) 128289566Shselasky{ 129289566Shselasky if (timeout < 0) 130289566Shselasky return 0; 131289566Shselasky 132289566Shselasky pause("lstim", timeout); 133289566Shselasky 134289566Shselasky return 0; 135289566Shselasky} 136289566Shselasky 137219820Sjeff#endif /* _LINUX_SCHED_H_ */ 138