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1 | /*****************************************************************************\ |
2 | * Copyright (C) 2007-2010 Lawrence Livermore National Security, LLC. | |
3 | * Copyright (C) 2007 The Regents of the University of California. | |
4 | * Produced at Lawrence Livermore National Laboratory (cf, DISCLAIMER). | |
5 | * Written by Brian Behlendorf <behlendorf1@llnl.gov>. | |
715f6251 | 6 | * UCRL-CODE-235197 |
7 | * | |
716154c5 BB |
8 | * This file is part of the SPL, Solaris Porting Layer. |
9 | * For details, see <http://github.com/behlendorf/spl/>. | |
10 | * | |
11 | * The SPL is free software; you can redistribute it and/or modify it | |
12 | * under the terms of the GNU General Public License as published by the | |
13 | * Free Software Foundation; either version 2 of the License, or (at your | |
14 | * option) any later version. | |
715f6251 | 15 | * |
716154c5 | 16 | * The SPL is distributed in the hope that it will be useful, but WITHOUT |
715f6251 | 17 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
18 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
19 | * for more details. | |
20 | * | |
21 | * You should have received a copy of the GNU General Public License along | |
716154c5 BB |
22 | * with the SPL. If not, see <http://www.gnu.org/licenses/>. |
23 | \*****************************************************************************/ | |
715f6251 | 24 | |
09b414e8 | 25 | #ifndef _SPL_TASKQ_H |
26 | #define _SPL_TASKQ_H | |
f1ca4da6 | 27 | |
f1b59d26 | 28 | #include <linux/module.h> |
f1ca4da6 | 29 | #include <linux/gfp.h> |
30 | #include <linux/slab.h> | |
31 | #include <linux/interrupt.h> | |
bcd68186 | 32 | #include <linux/kthread.h> |
f4b37741 | 33 | #include <sys/types.h> |
925ca8cc | 34 | #include <sys/thread.h> |
f1ca4da6 | 35 | |
bcd68186 | 36 | #define TASKQ_NAMELEN 31 |
f1ca4da6 | 37 | |
bcd68186 | 38 | #define TASKQ_PREPOPULATE 0x00000001 |
39 | #define TASKQ_CPR_SAFE 0x00000002 | |
40 | #define TASKQ_DYNAMIC 0x00000004 | |
915404bd | 41 | #define TASKQ_THREADS_CPU_PCT 0x00000008 |
5be4767a | 42 | #define TASKQ_DC_BATCH 0x00000010 |
372c2572 | 43 | #define TASKQ_NORECLAIM 0x00000020 |
f1ca4da6 | 44 | |
f1ca4da6 | 45 | typedef unsigned long taskqid_t; |
bcd68186 | 46 | typedef void (task_func_t)(void *); |
f1ca4da6 | 47 | |
2c02b71b PS |
48 | typedef struct taskq_ent { |
49 | spinlock_t tqent_lock; | |
50 | struct list_head tqent_list; | |
51 | taskqid_t tqent_id; | |
52 | task_func_t *tqent_func; | |
53 | void *tqent_arg; | |
44217f7a | 54 | uintptr_t tqent_flags; |
2c02b71b PS |
55 | } taskq_ent_t; |
56 | ||
44217f7a PS |
57 | #define TQENT_FLAG_PREALLOC 0x1 |
58 | ||
f1ca4da6 | 59 | /* |
60 | * Flags for taskq_dispatch. TQ_SLEEP/TQ_NOSLEEP should be same as | |
bcd68186 | 61 | * KM_SLEEP/KM_NOSLEEP. TQ_NOQUEUE/TQ_NOALLOC are set particularly |
62 | * large so as not to conflict with already used GFP_* defines. | |
f1ca4da6 | 63 | */ |
bcd68186 | 64 | #define TQ_SLEEP KM_SLEEP |
65 | #define TQ_NOSLEEP KM_NOSLEEP | |
66 | #define TQ_NOQUEUE 0x01000000 | |
67 | #define TQ_NOALLOC 0x02000000 | |
68 | #define TQ_NEW 0x04000000 | |
5be4767a | 69 | #define TQ_FRONT 0x08000000 |
bcd68186 | 70 | #define TQ_ACTIVE 0x80000000 |
71 | ||
bcd68186 | 72 | typedef struct taskq { |
73 | spinlock_t tq_lock; /* protects taskq_t */ | |
749045bb | 74 | unsigned long tq_lock_flags; /* interrupt state */ |
bcd68186 | 75 | const char *tq_name; /* taskq name */ |
2c02b71b PS |
76 | struct list_head tq_thread_list;/* list of all threads */ |
77 | struct list_head tq_active_list;/* list of active threads */ | |
bcd68186 | 78 | int tq_nactive; /* # of active threads */ |
79 | int tq_nthreads; /* # of total threads */ | |
80 | int tq_pri; /* priority */ | |
81 | int tq_minalloc; /* min task_t pool size */ | |
82 | int tq_maxalloc; /* max task_t pool size */ | |
83 | int tq_nalloc; /* cur task_t pool size */ | |
84 | uint_t tq_flags; /* flags */ | |
85 | taskqid_t tq_next_id; /* next pend/work id */ | |
86 | taskqid_t tq_lowest_id; /* lowest pend/work id */ | |
87 | struct list_head tq_free_list; /* free task_t's */ | |
bcd68186 | 88 | struct list_head tq_pend_list; /* pending task_t's */ |
f0d8bb26 | 89 | struct list_head tq_prio_list; /* priority pending task_t's */ |
bcd68186 | 90 | wait_queue_head_t tq_work_waitq; /* new work waitq */ |
91 | wait_queue_head_t tq_wait_waitq; /* wait waitq */ | |
92 | } taskq_t; | |
f1ca4da6 | 93 | |
2c02b71b PS |
94 | typedef struct taskq_thread { |
95 | struct list_head tqt_thread_list; | |
96 | struct list_head tqt_active_list; | |
97 | struct task_struct *tqt_thread; | |
98 | taskq_t *tqt_tq; | |
e7e5f78e | 99 | taskqid_t tqt_id; |
2c02b71b PS |
100 | } taskq_thread_t; |
101 | ||
e9cb2b4f BB |
102 | /* Global system-wide dynamic task queue available for all consumers */ |
103 | extern taskq_t *system_taskq; | |
104 | ||
f1ca4da6 | 105 | extern taskqid_t __taskq_dispatch(taskq_t *, task_func_t, void *, uint_t); |
44217f7a PS |
106 | extern void __taskq_dispatch_ent(taskq_t *, task_func_t, void *, uint_t, taskq_ent_t *); |
107 | extern int __taskq_empty_ent(taskq_ent_t *); | |
108 | extern void __taskq_init_ent(taskq_ent_t *); | |
f1ca4da6 | 109 | extern taskq_t *__taskq_create(const char *, int, pri_t, int, int, uint_t); |
b123971f | 110 | extern void __taskq_destroy(taskq_t *); |
7257ec41 | 111 | extern void __taskq_wait_id(taskq_t *, taskqid_t); |
b123971f | 112 | extern void __taskq_wait(taskq_t *); |
bcd68186 | 113 | extern int __taskq_member(taskq_t *, void *); |
114 | ||
e9cb2b4f BB |
115 | int spl_taskq_init(void); |
116 | void spl_taskq_fini(void); | |
117 | ||
bcd68186 | 118 | #define taskq_member(tq, t) __taskq_member(tq, t) |
119 | #define taskq_wait_id(tq, id) __taskq_wait_id(tq, id) | |
120 | #define taskq_wait(tq) __taskq_wait(tq) | |
121 | #define taskq_dispatch(tq, f, p, fl) __taskq_dispatch(tq, f, p, fl) | |
44217f7a PS |
122 | #define taskq_dispatch_ent(tq, f, p, fl, t) __taskq_dispatch_ent(tq, f, p, fl, t) |
123 | #define taskq_empty_ent(t) __taskq_empty_ent(t) | |
124 | #define taskq_init_ent(t) __taskq_init_ent(t) | |
bcd68186 | 125 | #define taskq_create(n, th, p, mi, ma, fl) __taskq_create(n, th, p, mi, ma, fl) |
ae4c36ad BB |
126 | #define taskq_create_proc(n, th, p, mi, ma, pr, fl) \ |
127 | __taskq_create(n, th, p, mi, ma, fl) | |
128 | #define taskq_create_sysdc(n, th, mi, ma, pr, dc, fl) \ | |
129 | __taskq_create(n, th, maxclsyspri, mi, ma, fl) | |
bcd68186 | 130 | #define taskq_destroy(tq) __taskq_destroy(tq) |
f1ca4da6 | 131 | |
09b414e8 | 132 | #endif /* _SPL_TASKQ_H */ |