/*****************************************************************************\ * Copyright (C) 2007-2010 Lawrence Livermore National Security, LLC. * Copyright (C) 2007 The Regents of the University of California. * Produced at Lawrence Livermore National Laboratory (cf, DISCLAIMER). * Written by Brian Behlendorf . * UCRL-CODE-235197 * * This file is part of the SPL, Solaris Porting Layer. * For details, see . * * The SPL is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License as published by the * Free Software Foundation; either version 2 of the License, or (at your * option) any later version. * * The SPL is distributed in the hope that it will be useful, but WITHOUT * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License * for more details. * * You should have received a copy of the GNU General Public License along * with the SPL. If not, see . \*****************************************************************************/ #ifndef _SPL_TASKQ_H #define _SPL_TASKQ_H #include #include #include #include #include #include #include #define TASKQ_NAMELEN 31 #define TASKQ_PREPOPULATE 0x00000001 #define TASKQ_CPR_SAFE 0x00000002 #define TASKQ_DYNAMIC 0x00000004 #define TASKQ_THREADS_CPU_PCT 0x00000008 #define TASKQ_DC_BATCH 0x00000010 typedef unsigned long taskqid_t; typedef void (task_func_t)(void *); typedef struct taskq_ent { spinlock_t tqent_lock; struct list_head tqent_list; taskqid_t tqent_id; task_func_t *tqent_func; void *tqent_arg; uintptr_t tqent_flags; } taskq_ent_t; #define TQENT_FLAG_PREALLOC 0x1 /* * Flags for taskq_dispatch. TQ_SLEEP/TQ_NOSLEEP should be same as * KM_SLEEP/KM_NOSLEEP. TQ_NOQUEUE/TQ_NOALLOC are set particularly * large so as not to conflict with already used GFP_* defines. */ #define TQ_SLEEP KM_SLEEP #define TQ_NOSLEEP KM_NOSLEEP #define TQ_PUSHPAGE KM_PUSHPAGE #define TQ_NOQUEUE 0x01000000 #define TQ_NOALLOC 0x02000000 #define TQ_NEW 0x04000000 #define TQ_FRONT 0x08000000 #define TQ_ACTIVE 0x80000000 typedef struct taskq { spinlock_t tq_lock; /* protects taskq_t */ unsigned long tq_lock_flags; /* interrupt state */ const char *tq_name; /* taskq name */ struct list_head tq_thread_list;/* list of all threads */ struct list_head tq_active_list;/* list of active threads */ int tq_nactive; /* # of active threads */ int tq_nthreads; /* # of total threads */ int tq_pri; /* priority */ int tq_minalloc; /* min task_t pool size */ int tq_maxalloc; /* max task_t pool size */ int tq_nalloc; /* cur task_t pool size */ uint_t tq_flags; /* flags */ taskqid_t tq_next_id; /* next pend/work id */ taskqid_t tq_lowest_id; /* lowest pend/work id */ struct list_head tq_free_list; /* free task_t's */ struct list_head tq_pend_list; /* pending task_t's */ struct list_head tq_prio_list; /* priority pending task_t's */ wait_queue_head_t tq_work_waitq; /* new work waitq */ wait_queue_head_t tq_wait_waitq; /* wait waitq */ } taskq_t; typedef struct taskq_thread { struct list_head tqt_thread_list; struct list_head tqt_active_list; struct task_struct *tqt_thread; taskq_t *tqt_tq; taskqid_t tqt_id; uintptr_t tqt_flags; } taskq_thread_t; /* Global system-wide dynamic task queue available for all consumers */ extern taskq_t *system_taskq; extern taskqid_t __taskq_dispatch(taskq_t *, task_func_t, void *, uint_t); extern void __taskq_dispatch_ent(taskq_t *, task_func_t, void *, uint_t, taskq_ent_t *); extern int __taskq_empty_ent(taskq_ent_t *); extern void __taskq_init_ent(taskq_ent_t *); extern taskq_t *__taskq_create(const char *, int, pri_t, int, int, uint_t); extern void __taskq_destroy(taskq_t *); extern void __taskq_wait_id(taskq_t *, taskqid_t); extern void __taskq_wait(taskq_t *); extern int __taskq_member(taskq_t *, void *); int spl_taskq_init(void); void spl_taskq_fini(void); #define taskq_member(tq, t) __taskq_member(tq, t) #define taskq_wait_id(tq, id) __taskq_wait_id(tq, id) #define taskq_wait(tq) __taskq_wait(tq) #define taskq_dispatch(tq, f, p, fl) __taskq_dispatch(tq, f, p, fl) #define taskq_dispatch_ent(tq, f, p, fl, t) __taskq_dispatch_ent(tq, f, p, fl, t) #define taskq_empty_ent(t) __taskq_empty_ent(t) #define taskq_init_ent(t) __taskq_init_ent(t) #define taskq_create(n, th, p, mi, ma, fl) __taskq_create(n, th, p, mi, ma, fl) #define taskq_create_proc(n, th, p, mi, ma, pr, fl) \ __taskq_create(n, th, p, mi, ma, fl) #define taskq_create_sysdc(n, th, mi, ma, pr, dc, fl) \ __taskq_create(n, th, maxclsyspri, mi, ma, fl) #define taskq_destroy(tq) __taskq_destroy(tq) #endif /* _SPL_TASKQ_H */