1 /* $NetBSD: tasklet.h,v 1.6 2021/12/19 11:49:11 riastradh Exp $ */ 2 3 /*- 4 * Copyright (c) 2018, 2020 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Taylor R. Campbell. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 * POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32 #ifndef _LINUX_TASKLET_H_ 33 #define _LINUX_TASKLET_H_ 34 35 /* namespace */ 36 #define __tasklet_disable_sync_once linux___tasklet_disable_sync_once 37 #define __tasklet_enable linux___tasklet_enable 38 #define __tasklet_enable_sync_once linux___tasklet_enable_sync_once 39 #define __tasklet_is_enabled linux___tasklet_is_enabled 40 #define __tasklet_is_scheduled linux___tasklet_is_scheduled 41 #define tasklet_disable linux_tasklet_disable 42 #define tasklet_enable linux_tasklet_enable 43 #define tasklet_hi_schedule linux_tasklet_hi_schedule 44 #define tasklet_init linux_tasklet_init 45 #define tasklet_is_locked linux_tasklet_is_locked 46 #define tasklet_kill linux_tasklet_kill 47 #define tasklet_schedule linux_tasklet_schedule 48 #define tasklet_struct linux_tasklet_struct 49 #define tasklet_trylock linux_tasklet_trylock 50 #define tasklet_unlock linux_tasklet_unlock 51 #define tasklet_unlock_wait linux_tasklet_unlock_wait 52 53 struct tasklet_struct { 54 SIMPLEQ_ENTRY(tasklet_struct) tl_entry; 55 volatile unsigned tl_state; 56 volatile unsigned tl_disablecount; 57 /* begin Linux API */ 58 void (*func)(unsigned long); 59 unsigned long data; 60 /* end Linux API */ 61 }; 62 63 #define DEFINE_TASKLET(name, func, data) \ 64 struct tasklet_struct name = { \ 65 .tl_state = 0, \ 66 .tl_disablecount = 0, \ 67 .func = (func), \ 68 .data = (data), \ 69 } 70 71 #define DEFINE_TASKLET_DISABLED(name, func, data) \ 72 struct tasklet_struct name = { \ 73 .tl_state = 0, \ 74 .tl_disablecount = 1, \ 75 .func = (func), \ 76 .data = (data), \ 77 } 78 79 int linux_tasklets_init(void); 80 void linux_tasklets_fini(void); 81 82 void tasklet_init(struct tasklet_struct *, void (*)(unsigned long), 83 unsigned long); 84 void tasklet_disable_nosync(struct tasklet_struct *); 85 void tasklet_disable(struct tasklet_struct *); 86 void tasklet_enable(struct tasklet_struct *); 87 void tasklet_schedule(struct tasklet_struct *); 88 void tasklet_hi_schedule(struct tasklet_struct *); 89 void tasklet_kill(struct tasklet_struct *); 90 91 bool tasklet_is_locked(const struct tasklet_struct *); 92 bool tasklet_trylock(struct tasklet_struct *); 93 void tasklet_unlock(struct tasklet_struct *); 94 void tasklet_unlock_wait(const struct tasklet_struct *); 95 96 /* i915 hacks */ 97 void __tasklet_disable_sync_once(struct tasklet_struct *); 98 void __tasklet_enable_sync_once(struct tasklet_struct *); 99 bool __tasklet_is_enabled(const struct tasklet_struct *); 100 bool __tasklet_is_scheduled(const struct tasklet_struct *); 101 bool __tasklet_enable(struct tasklet_struct *); 102 103 #endif /* _LINUX_TASKLET_H_ */ 104