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2c4332cf | 1 | /* |
716154c5 BB |
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 | 8 | * This file is part of the SPL, Solaris Porting Layer. |
3d6af2dd | 9 | * For details, see <http://zfsonlinux.org/>. |
716154c5 BB |
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 | 22 | * with the SPL. If not, see <http://www.gnu.org/licenses/>. |
2c4332cf | 23 | */ |
715f6251 | 24 | |
09b414e8 | 25 | #ifndef _SPL_TASKQ_H |
2c4332cf | 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> |
200366f2 | 35 | #include <sys/rwlock.h> |
f1ca4da6 | 36 | |
2c4332cf | 37 | #define TASKQ_NAMELEN 31 |
f1ca4da6 | 38 | |
2c4332cf BB |
39 | #define TASKQ_PREPOPULATE 0x00000001 |
40 | #define TASKQ_CPR_SAFE 0x00000002 | |
41 | #define TASKQ_DYNAMIC 0x00000004 | |
42 | #define TASKQ_THREADS_CPU_PCT 0x00000008 | |
43 | #define TASKQ_DC_BATCH 0x00000010 | |
44 | #define TASKQ_ACTIVE 0x80000000 | |
f1ca4da6 | 45 | |
f1ca4da6 | 46 | /* |
47 | * Flags for taskq_dispatch. TQ_SLEEP/TQ_NOSLEEP should be same as | |
bcd68186 | 48 | * KM_SLEEP/KM_NOSLEEP. TQ_NOQUEUE/TQ_NOALLOC are set particularly |
49 | * large so as not to conflict with already used GFP_* defines. | |
f1ca4da6 | 50 | */ |
2c4332cf BB |
51 | #define TQ_SLEEP 0x00000000 |
52 | #define TQ_NOSLEEP 0x00000001 | |
53 | #define TQ_PUSHPAGE 0x00000002 | |
54 | #define TQ_NOQUEUE 0x01000000 | |
55 | #define TQ_NOALLOC 0x02000000 | |
56 | #define TQ_NEW 0x04000000 | |
57 | #define TQ_FRONT 0x08000000 | |
58 | ||
59 | /* | |
60 | * spin_lock(lock) and spin_lock_nested(lock,0) are equivalent, | |
326172d8 OF |
61 | * so TQ_LOCK_DYNAMIC must not evaluate to 0 |
62 | */ | |
63 | typedef enum tq_lock_role { | |
64 | TQ_LOCK_GENERAL = 0, | |
65 | TQ_LOCK_DYNAMIC = 1, | |
66 | } tq_lock_role_t; | |
67 | ||
d9acd930 BB |
68 | typedef unsigned long taskqid_t; |
69 | typedef void (task_func_t)(void *); | |
70 | ||
bcd68186 | 71 | typedef struct taskq { |
2c4332cf BB |
72 | spinlock_t tq_lock; /* protects taskq_t */ |
73 | char *tq_name; /* taskq name */ | |
200366f2 | 74 | int tq_instance; /* instance of tq_name */ |
2c4332cf BB |
75 | struct list_head tq_thread_list; /* list of all threads */ |
76 | struct list_head tq_active_list; /* list of active threads */ | |
77 | int tq_nactive; /* # of active threads */ | |
78 | int tq_nthreads; /* # of existing threads */ | |
79 | int tq_nspawn; /* # of threads being spawned */ | |
80 | int tq_maxthreads; /* # of threads maximum */ | |
81 | int tq_pri; /* priority */ | |
200366f2 TC |
82 | int tq_minalloc; /* min taskq_ent_t pool size */ |
83 | int tq_maxalloc; /* max taskq_ent_t pool size */ | |
84 | int tq_nalloc; /* cur taskq_ent_t pool size */ | |
2c4332cf BB |
85 | uint_t tq_flags; /* flags */ |
86 | taskqid_t tq_next_id; /* next pend/work id */ | |
87 | taskqid_t tq_lowest_id; /* lowest pend/work id */ | |
200366f2 TC |
88 | struct list_head tq_free_list; /* free taskq_ent_t's */ |
89 | struct list_head tq_pend_list; /* pending taskq_ent_t's */ | |
90 | struct list_head tq_prio_list; /* priority pending taskq_ent_t's */ | |
91 | struct list_head tq_delay_list; /* delayed taskq_ent_t's */ | |
92 | struct list_head tq_taskqs; /* all taskq_t's */ | |
2c4332cf BB |
93 | wait_queue_head_t tq_work_waitq; /* new work waitq */ |
94 | wait_queue_head_t tq_wait_waitq; /* wait waitq */ | |
95 | tq_lock_role_t tq_lock_class; /* class when taking tq_lock */ | |
bcd68186 | 96 | } taskq_t; |
f1ca4da6 | 97 | |
d9acd930 BB |
98 | typedef struct taskq_ent { |
99 | spinlock_t tqent_lock; | |
100 | wait_queue_head_t tqent_waitq; | |
101 | struct timer_list tqent_timer; | |
102 | struct list_head tqent_list; | |
103 | taskqid_t tqent_id; | |
104 | task_func_t *tqent_func; | |
105 | void *tqent_arg; | |
106 | taskq_t *tqent_taskq; | |
107 | uintptr_t tqent_flags; | |
8f3b403a | 108 | unsigned long tqent_birth; |
d9acd930 BB |
109 | } taskq_ent_t; |
110 | ||
2c4332cf BB |
111 | #define TQENT_FLAG_PREALLOC 0x1 |
112 | #define TQENT_FLAG_CANCEL 0x2 | |
d9acd930 | 113 | |
2c02b71b | 114 | typedef struct taskq_thread { |
472a34ca BB |
115 | struct list_head tqt_thread_list; |
116 | struct list_head tqt_active_list; | |
117 | struct task_struct *tqt_thread; | |
118 | taskq_t *tqt_tq; | |
119 | taskqid_t tqt_id; | |
d9acd930 | 120 | taskq_ent_t *tqt_task; |
472a34ca | 121 | uintptr_t tqt_flags; |
2c02b71b PS |
122 | } taskq_thread_t; |
123 | ||
e9cb2b4f BB |
124 | /* Global system-wide dynamic task queue available for all consumers */ |
125 | extern taskq_t *system_taskq; | |
126 | ||
200366f2 TC |
127 | /* List of all taskqs */ |
128 | extern struct list_head tq_list; | |
129 | extern struct rw_semaphore tq_list_sem; | |
130 | ||
aed8671c | 131 | extern taskqid_t taskq_dispatch(taskq_t *, task_func_t, void *, uint_t); |
d9acd930 BB |
132 | extern taskqid_t taskq_dispatch_delay(taskq_t *, task_func_t, void *, |
133 | uint_t, clock_t); | |
aed8671c BB |
134 | extern void taskq_dispatch_ent(taskq_t *, task_func_t, void *, uint_t, |
135 | taskq_ent_t *); | |
136 | extern int taskq_empty_ent(taskq_ent_t *); | |
137 | extern void taskq_init_ent(taskq_ent_t *); | |
138 | extern taskq_t *taskq_create(const char *, int, pri_t, int, int, uint_t); | |
139 | extern void taskq_destroy(taskq_t *); | |
140 | extern void taskq_wait_id(taskq_t *, taskqid_t); | |
a876b030 | 141 | extern void taskq_wait_outstanding(taskq_t *, taskqid_t); |
aed8671c | 142 | extern void taskq_wait(taskq_t *); |
d9acd930 | 143 | extern int taskq_cancel_id(taskq_t *, taskqid_t); |
16522ac2 | 144 | extern int taskq_member(taskq_t *, kthread_t *); |
aed8671c | 145 | |
2c4332cf | 146 | #define taskq_create_proc(name, nthreads, pri, min, max, proc, flags) \ |
aed8671c | 147 | taskq_create(name, nthreads, pri, min, max, flags) |
2c4332cf | 148 | #define taskq_create_sysdc(name, nthreads, min, max, proc, dc, flags) \ |
9dc5ffbe | 149 | taskq_create(name, nthreads, maxclsyspri, min, max, flags) |
bcd68186 | 150 | |
e9cb2b4f BB |
151 | int spl_taskq_init(void); |
152 | void spl_taskq_fini(void); | |
153 | ||
09b414e8 | 154 | #endif /* _SPL_TASKQ_H */ |