kernel - Fix excessive ipiq recursion (4)
[dragonfly.git] / sys / sys / thread.h
CommitLineData
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1/*
2 * SYS/THREAD.H
3 *
4 * Implements the architecture independant portion of the LWKT
5 * subsystem.
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6 *
7 * Types which must already be defined when this header is included by
8 * userland: struct md_thread
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9 */
10
11#ifndef _SYS_THREAD_H_
12#define _SYS_THREAD_H_
13
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14#ifndef _SYS_STDINT_H_
15#include <sys/stdint.h> /* __int types */
16#endif
17#ifndef _SYS_PARAM_H_
18#include <sys/param.h> /* MAXCOMLEN */
19#endif
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20#ifndef _SYS_QUEUE_H_
21#include <sys/queue.h> /* TAILQ_* macros */
22#endif
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23#ifndef _SYS_MSGPORT_H_
24#include <sys/msgport.h> /* lwkt_port */
25#endif
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26#ifndef _SYS_TIME_H_
27#include <sys/time.h> /* struct timeval */
28#endif
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29#ifndef _SYS_LOCK_H
30#include <sys/lock.h>
31#endif
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32#ifndef _SYS_SPINLOCK_H_
33#include <sys/spinlock.h>
34#endif
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35#ifndef _SYS_IOSCHED_H_
36#include <sys/iosched.h>
37#endif
1bd40720 38#include <machine/thread.h>
8a8d5d85 39
f1d1c3fa 40struct globaldata;
ef09c3ed 41struct lwp;
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42struct proc;
43struct thread;
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44struct lwkt_queue;
45struct lwkt_token;
41a01a4d 46struct lwkt_tokref;
96728c05 47struct lwkt_ipiq;
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48struct lwkt_cpu_msg;
49struct lwkt_cpu_port;
3b6b7bd1 50struct lwkt_cpusync;
4fd10eb6 51union sysunion;
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52
53typedef struct lwkt_queue *lwkt_queue_t;
54typedef struct lwkt_token *lwkt_token_t;
41a01a4d 55typedef struct lwkt_tokref *lwkt_tokref_t;
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56typedef struct lwkt_cpu_msg *lwkt_cpu_msg_t;
57typedef struct lwkt_cpu_port *lwkt_cpu_port_t;
96728c05 58typedef struct lwkt_ipiq *lwkt_ipiq_t;
3b6b7bd1 59typedef struct lwkt_cpusync *lwkt_cpusync_t;
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60typedef struct thread *thread_t;
61
62typedef TAILQ_HEAD(lwkt_queue, thread) lwkt_queue;
f1d1c3fa 63
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64/*
65 * Differentiation between kernel threads and user threads. Userland
66 * programs which want to access to kernel structures have to define
67 * _KERNEL_STRUCTURES. This is a kinda safety valve to prevent badly
68 * written user programs from getting an LWKT thread that is neither the
69 * kernel nor the user version.
70 */
71#if defined(_KERNEL) || defined(_KERNEL_STRUCTURES)
3b2f3463 72#ifndef _CPU_FRAME_H_
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73#include <machine/frame.h>
74#endif
75#else
76struct intrframe;
ece04fd0 77#endif
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78
79/*
41a01a4d 80 * Tokens are used to serialize access to information. They are 'soft'
dd55d707 81 * serialization entities that only stay in effect while a thread is
41a01a4d 82 * running. If the thread blocks, other threads can run holding the same
dd55d707 83 * token(s). The tokens are reacquired when the original thread resumes.
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84 *
85 * A thread can depend on its serialization remaining intact through a
86 * preemption. An interrupt which attempts to use the same token as the
87 * thread being preempted will reschedule itself for non-preemptive
88 * operation, so the new token code is capable of interlocking against
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89 * interrupts as well as other cpus. This means that your token can only
90 * be (temporarily) lost if you *explicitly* block.
41a01a4d 91 *
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92 * Tokens are managed through a helper reference structure, lwkt_tokref. Each
93 * thread has a stack of tokref's to keep track of acquired tokens. Multiple
94 * tokref's may reference the same token.
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95 *
96 * Tokens can be held shared or exclusive. An exclusive holder is able
97 * to set the TOK_EXCLUSIVE bit in t_count as long as no bit in the count
98 * mask is set. If unable to accomplish this TOK_EXCLREQ can be set instead
99 * which prevents any new shared acquisitions while the exclusive requestor
100 * spins in the scheduler. A shared holder can bump t_count by the increment
101 * value as long as neither TOK_EXCLUSIVE or TOK_EXCLREQ is set, else spin
102 * in the scheduler.
103 *
104 * Multiple exclusive tokens are handled by treating the additional tokens
105 * as a special case of the shared token, incrementing the count value. This
106 * reduces the complexity of the token release code.
f1d1c3fa 107 */
dd55d707 108
f1d1c3fa 109typedef struct lwkt_token {
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110 long t_count; /* Shared/exclreq/exclusive access */
111 struct lwkt_tokref *t_ref; /* Exclusive ref */
c9aa7a82 112 long t_collisions; /* Collision counter */
b37f18d6 113 const char *t_desc; /* Descriptive name */
7eb611ef 114} lwkt_token;
dd55d707 115
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116#define TOK_EXCLUSIVE 0x00000001 /* Exclusive lock held */
117#define TOK_EXCLREQ 0x00000002 /* Exclusive request pending */
118#define TOK_INCR 4 /* Shared count increment */
119#define TOK_COUNTMASK (~(long)(TOK_EXCLUSIVE|TOK_EXCLREQ))
120
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121/*
122 * Static initialization for a lwkt_token.
3b998fa9 123 */
a3c18566 124#define LWKT_TOKEN_INITIALIZER(name) \
c6fbe95a 125{ \
54341a3b 126 .t_count = 0, \
3b998fa9 127 .t_ref = NULL, \
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128 .t_collisions = 0, \
129 .t_desc = #name \
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130}
131
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132/*
133 * Assert that a particular token is held
134 */
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135#define LWKT_TOKEN_HELD_ANY(tok) _lwkt_token_held_any(tok, curthread)
136#define LWKT_TOKEN_HELD_EXCL(tok) _lwkt_token_held_excl(tok, curthread)
b5d16701 137
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138#define ASSERT_LWKT_TOKEN_HELD(tok) \
139 KKASSERT(LWKT_TOKEN_HELD_ANY(tok))
140
141#define ASSERT_LWKT_TOKEN_HELD_EXCL(tok) \
142 KKASSERT(LWKT_TOKEN_HELD_EXCL(tok))
b5d16701 143
3933a3ab 144#define ASSERT_NO_TOKENS_HELD(td) \
b5d16701 145 KKASSERT((td)->td_toks_stop == &td->td_toks_array[0])
8ed305a4 146
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147/*
148 * Assert that a particular token is held and we are in a hard
149 * code execution section (interrupt, ipi, or hard code section).
150 * Hard code sections are not allowed to block or potentially block.
151 * e.g. lwkt_gettoken() would only be ok if the token were already
152 * held.
153 */
154#define ASSERT_LWKT_TOKEN_HARD(tok) \
155 do { \
156 globaldata_t zgd __debugvar = mycpu; \
157 KKASSERT((tok)->t_ref && \
158 (tok)->t_ref->tr_owner == zgd->gd_curthread && \
159 zgd->gd_intr_nesting_level > 0); \
160 } while(0)
161
162/*
163 * Assert that a particular token is held and we are in a normal
164 * critical section. Critical sections will not be preempted but
165 * can explicitly block (tsleep, lwkt_gettoken, etc).
166 */
167#define ASSERT_LWKT_TOKEN_CRIT(tok) \
168 do { \
169 globaldata_t zgd __debugvar = mycpu; \
170 KKASSERT((tok)->t_ref && \
171 (tok)->t_ref->tr_owner == zgd->gd_curthread && \
172 zgd->gd_curthread->td_critcount > 0); \
173 } while(0)
174
3b998fa9 175struct lwkt_tokref {
41a01a4d 176 lwkt_token_t tr_tok; /* token in question */
54341a3b 177 long tr_count; /* TOK_EXCLUSIVE|TOK_EXCLREQ or 0 */
c6fbe95a 178 struct thread *tr_owner; /* me */
3b998fa9 179};
41a01a4d 180
b12defdc 181#define MAXCPUFIFO 32 /* power of 2 */
96728c05 182#define MAXCPUFIFO_MASK (MAXCPUFIFO - 1)
3b998fa9 183#define LWKT_MAXTOKENS 32 /* max tokens beneficially held by thread */
96728c05 184
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185/*
186 * Always cast to ipifunc_t when registering an ipi. The actual ipi function
187 * is called with both the data and an interrupt frame, but the ipi function
188 * that is registered might only declare a data argument.
189 */
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190typedef void (*ipifunc1_t)(void *arg);
191typedef void (*ipifunc2_t)(void *arg, int arg2);
192typedef void (*ipifunc3_t)(void *arg, int arg2, struct intrframe *frame);
96728c05 193
1997b4c2 194struct lwkt_ipiq {
96728c05 195 int ip_rindex; /* only written by target cpu */
166ec852 196 int ip_xindex; /* written by target, indicates completion */
96728c05 197 int ip_windex; /* only written by source cpu */
5d920ec6 198 int ip_drain; /* drain source limit */
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199 struct {
200 ipifunc3_t func;
201 void *arg1;
202 int arg2;
203 char filler[32 - sizeof(int) - sizeof(void *) * 2];
204 } ip_info[MAXCPUFIFO];
1997b4c2 205};
96728c05 206
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207/*
208 * CPU Synchronization structure. See lwkt_cpusync_start() and
209 * lwkt_cpusync_finish() for more information.
210 */
d5b2d319 211typedef void (*cpusync_func_t)(void *arg);
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212
213struct lwkt_cpusync {
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214 cpumask_t cs_mask; /* cpus running the sync */
215 cpumask_t cs_mack; /* mask acknowledge */
216 cpusync_func_t cs_func; /* function to execute */
217 void *cs_data; /* function data */
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218};
219
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220/*
221 * The standard message and queue structure used for communications between
222 * cpus. Messages are typically queued via a machine-specific non-linked
223 * FIFO matrix allowing any cpu to send a message to any other cpu without
224 * blocking.
225 */
226typedef struct lwkt_cpu_msg {
227 void (*cm_func)(lwkt_cpu_msg_t msg); /* primary dispatch function */
228 int cm_code; /* request code if applicable */
229 int cm_cpu; /* reply to cpu */
230 thread_t cm_originator; /* originating thread for wakeup */
231} lwkt_cpu_msg;
232
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233/*
234 * Thread structure. Note that ownership of a thread structure is special
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235 * cased and there is no 'token'. A thread is always owned by the cpu
236 * represented by td_gd, any manipulation of the thread by some other cpu
237 * must be done through cpu_*msg() functions. e.g. you could request
238 * ownership of a thread that way, or hand a thread off to another cpu.
4b5f931b 239 *
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240 * NOTE: td_ucred is synchronized from the p_ucred on user->kernel syscall,
241 * trap, and AST/signal transitions to provide a stable ucred for
242 * (primarily) system calls. This field will be NULL for pure kernel
243 * threads.
f1d1c3fa 244 */
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245struct md_intr_info;
246
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247struct thread {
248 TAILQ_ENTRY(thread) td_threadq;
73e4f7b9 249 TAILQ_ENTRY(thread) td_allq;
ae8e83e6 250 TAILQ_ENTRY(thread) td_sleepq;
ece04fd0 251 lwkt_port td_msgport; /* built-in message port for replies */
ef09c3ed 252 struct lwp *td_lwp; /* (optional) associated lwp */
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253 struct proc *td_proc; /* (optional) associated process */
254 struct pcb *td_pcb; /* points to pcb and top of kstack */
26a0694b 255 struct globaldata *td_gd; /* associated with this cpu */
ae8050a4 256 const char *td_wmesg; /* string name for blockage */
5decebc7 257 const volatile void *td_wchan; /* waiting on channel */
4b5f931b 258 int td_pri; /* 0-31, 31=highest priority (note 1) */
f9235b6d 259 int td_critcount; /* critical section priority */
4643740a 260 u_int td_flags; /* TDF flags */
da5fb9ef 261 int td_wdomain; /* domain for wchan address (typ 0) */
f9235b6d 262 void (*td_preemptable)(struct thread *td, int critcount);
a2a5ad0d 263 void (*td_release)(struct thread *td);
7e1d4bf4 264 char *td_kstack; /* kernel stack */
f470d0c8 265 int td_kstack_size; /* size of kernel stack */
8ad65e08 266 char *td_sp; /* kernel stack pointer for LWKT restore */
cc9b6223 267 thread_t (*td_switch)(struct thread *ntd);
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268 __uint64_t td_uticks; /* Statclock hits in user mode (uS) */
269 __uint64_t td_sticks; /* Statclock hits in system mode (uS) */
270 __uint64_t td_iticks; /* Statclock hits processing intr (uS) */
69d78e99 271 int td_locks; /* lockmgr lock debugging */
3573cf7b 272 void *td_unused01; /* (future I/O scheduler heuristic) */
73e4f7b9 273 int td_refs; /* hold position in gd_tdallq / hold free */
46a3f46d 274 int td_nest_count; /* prevent splz nesting */
7fb451cb 275 u_int td_contended; /* token contention count */
4643740a 276 u_int td_mpflags; /* flags can be set by foreign cpus */
0f7a3396 277 int td_cscount; /* cpu synchronization master */
c75e41b7 278 int td_wakefromcpu; /* who woke me up? */
d992c377 279 int td_upri; /* user priority (sub-priority under td_pri) */
f256b6c0 280 int td_type; /* thread type, TD_TYPE_ */
d0e9385d 281 int td_tracker; /* for callers to debug lock counts */
b5d16701 282 int td_unused03[4]; /* for future fields */
79eae878 283 struct iosched_data td_iosdata; /* Dynamic I/O scheduling data */
41f3429e 284 struct timeval td_start; /* start time for a thread/process */
0cfcada1 285 char td_comm[MAXCOMLEN+1]; /* typ 16+1 bytes */
99df837e 286 struct thread *td_preempted; /* we preempted this thread */
d86a23e0 287 struct ucred *td_ucred; /* synchronized from p_ucred */
a86ce0cd 288 void *td_vmm; /* vmm private data */
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289 lwkt_tokref_t td_toks_have; /* tokens we own */
290 lwkt_tokref_t td_toks_stop; /* tokens we want */
3b998fa9 291 struct lwkt_tokref td_toks_array[LWKT_MAXTOKENS];
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292 int td_fairq_load; /* fairq */
293 int td_fairq_count; /* fairq */
cc9b6223 294 struct globaldata *td_migrate_gd; /* target gd for thread migration */
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295#ifdef DEBUG_CRIT_SECTIONS
296#define CRIT_DEBUG_ARRAY_SIZE 32
297#define CRIT_DEBUG_ARRAY_MASK (CRIT_DEBUG_ARRAY_SIZE - 1)
298 const char *td_crit_debug_array[CRIT_DEBUG_ARRAY_SIZE];
299 int td_crit_debug_index;
300 int td_in_crit_report;
301#endif
85100692 302 struct md_thread td_mach;
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303#ifdef DEBUG_LOCKS
304#define SPINLOCK_DEBUG_ARRAY_SIZE 32
305 int td_spinlock_stack_id[SPINLOCK_DEBUG_ARRAY_SIZE];
306 struct spinlock *td_spinlock_stack[SPINLOCK_DEBUG_ARRAY_SIZE];
307 void *td_spinlock_caller_pc[SPINLOCK_DEBUG_ARRAY_SIZE];
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308
309 /*
310 * Track lockmgr locks held; lk->lk_filename:lk->lk_lineno is the holder
311 */
312#define LOCKMGR_DEBUG_ARRAY_SIZE 8
313 int td_lockmgr_stack_id[LOCKMGR_DEBUG_ARRAY_SIZE];
314 struct lock *td_lockmgr_stack[LOCKMGR_DEBUG_ARRAY_SIZE];
1a474e56 315#endif
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316};
317
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318#define td_toks_base td_toks_array[0]
319#define td_toks_end td_toks_array[LWKT_MAXTOKENS]
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320
321#define TD_TOKS_HELD(td) ((td)->td_toks_stop != &(td)->td_toks_base)
322#define TD_TOKS_NOT_HELD(td) ((td)->td_toks_stop == &(td)->td_toks_base)
323
8ad65e08 324/*
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325 * Thread flags. Note that TDF_RUNNING is cleared on the old thread after
326 * we switch to the new one, which is necessary because LWKTs don't need
327 * to hold the BGL. This flag is used by the exit code and the managed
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328 * thread migration code. Note in addition that preemption will cause
329 * TDF_RUNNING to be cleared temporarily, so any code checking TDF_RUNNING
330 * must also check TDF_PREEMPT_LOCK.
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331 *
332 * LWKT threads stay on their (per-cpu) run queue while running, not to
333 * be confused with user processes which are removed from the user scheduling
334 * run queue while actually running.
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335 *
336 * td_threadq can represent the thread on one of three queues... the LWKT
337 * run queue, a tsleep queue, or an lwkt blocking queue. The LWKT subsystem
338 * does not allow a thread to be scheduled if it already resides on some
339 * queue.
8ad65e08 340 */
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341#define TDF_RUNNING 0x00000001 /* thread still active */
342#define TDF_RUNQ 0x00000002 /* on an LWKT run queue */
343#define TDF_PREEMPT_LOCK 0x00000004 /* I have been preempted */
344#define TDF_PREEMPT_DONE 0x00000008 /* ac preemption complete */
345#define TDF_NOSTART 0x00000010 /* do not schedule on create */
346#define TDF_MIGRATING 0x00000020 /* thread is being migrated */
347#define TDF_SINTR 0x00000040 /* interruptability for 'ps' */
348#define TDF_TSLEEPQ 0x00000080 /* on a tsleep wait queue */
26a0694b 349
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350#define TDF_SYSTHREAD 0x00000100 /* reserve memory may be used */
351#define TDF_ALLOCATED_THREAD 0x00000200 /* objcache allocated thread */
352#define TDF_ALLOCATED_STACK 0x00000400 /* objcache allocated stack */
353#define TDF_VERBOSE 0x00000800 /* verbose on exit */
354#define TDF_DEADLKTREAT 0x00001000 /* special lockmgr treatment */
eb2adbf5 355#define TDF_MARKER 0x00002000 /* tdallq list scan marker */
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356#define TDF_TIMEOUT_RUNNING 0x00004000 /* tsleep timeout race */
357#define TDF_TIMEOUT 0x00008000 /* tsleep timeout */
03aa8d99 358#define TDF_INTTHREAD 0x00010000 /* interrupt thread */
ae8e83e6 359#define TDF_TSLEEP_DESCHEDULED 0x00020000 /* tsleep core deschedule */
8ec60c3f 360#define TDF_BLOCKED 0x00040000 /* Thread is blocked */
a7422615 361#define TDF_PANICWARN 0x00080000 /* panic warning in switch */
344ad853 362#define TDF_BLOCKQ 0x00100000 /* on block queue */
392cd266 363#define TDF_FORCE_SPINPORT 0x00200000
c1102e9f 364#define TDF_EXITING 0x00400000 /* thread exiting */
1b251f0a 365#define TDF_USINGFP 0x00800000 /* thread using fp coproc */
aad81e48 366#define TDF_KERNELFP 0x01000000 /* kernel using fp coproc */
b0da0c88 367#define TDF_DELAYED_WAKEUP 0x02000000
c068fb59 368#define TDF_FIXEDCPU 0x04000000 /* running cpu is fixed */
d992c377 369#define TDF_USERMODE 0x08000000 /* in or entering user mode */
862481e5 370#define TDF_NOFAULT 0x10000000 /* force onfault on fault */
8ad65e08 371
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372#define TDF_MP_STOPREQ 0x00000001 /* suspend_kproc */
373#define TDF_MP_WAKEREQ 0x00000002 /* resume_kproc */
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374#define TDF_MP_EXITWAIT 0x00000004 /* reaper, see lwp_wait() */
375#define TDF_MP_EXITSIG 0x00000008 /* reaper, see lwp_wait() */
a3ef5f2e 376#define TDF_MP_BATCH_DEMARC 0x00000010 /* batch mode handling */
8cee56f4 377#define TDF_MP_DIDYIELD 0x00000020 /* effects scheduling */
4643740a 378
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379#define TD_TYPE_GENERIC 0 /* generic thread */
380#define TD_TYPE_CRYPTO 1 /* crypto thread */
381#define TD_TYPE_NETISR 2 /* netisr thread */
382
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383/*
384 * Thread priorities. Typically only one thread from any given
385 * user process scheduling queue is on the LWKT run queue at a time.
386 * Remember that there is one LWKT run queue per cpu.
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387 *
388 * Critical sections are handled by bumping td_pri above TDPRI_MAX, which
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389 * causes interrupts to be masked as they occur. When this occurs a
390 * rollup flag will be set in mycpu->gd_reqflags.
2df9fa87 391 */
f1d1c3fa 392#define TDPRI_IDLE_THREAD 0 /* the idle thread */
bb6811be 393#define TDPRI_IDLE_WORK 1 /* idle work (page zero, etc) */
50017724 394#define TDPRI_USER_SCHEDULER 2 /* user scheduler helper */
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395#define TDPRI_USER_IDLE 4 /* user scheduler idle */
396#define TDPRI_USER_NORM 6 /* user scheduler normal */
397#define TDPRI_USER_REAL 8 /* user scheduler real time */
ba4f2421 398#define TDPRI_KERN_LPSCHED 9 /* (comparison point only) */
f1d1c3fa 399#define TDPRI_KERN_USER 10 /* kernel / block in syscall */
26a0694b 400#define TDPRI_KERN_DAEMON 12 /* kernel daemon (pageout, etc) */
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401#define TDPRI_SOFT_NORM 14 /* kernel / normal */
402#define TDPRI_SOFT_TIMER 16 /* kernel / timer */
ba4f2421 403#define TDPRI_UNUSED19 19
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404#define TDPRI_INT_SUPPORT 20 /* kernel / high priority support */
405#define TDPRI_INT_LOW 27 /* low priority interrupt */
406#define TDPRI_INT_MED 28 /* medium priority interrupt */
407#define TDPRI_INT_HIGH 29 /* high priority interrupt */
408#define TDPRI_MAX 31
409
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410#define LWKT_THREAD_STACK (UPAGES * PAGE_SIZE)
411
f9235b6d 412#define IN_CRITICAL_SECT(td) ((td)->td_critcount)
f8c3996b 413
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414#ifdef _KERNEL
415
416/*
417 * Global tokens
418 */
b5d16701 419extern struct lwkt_token mp_token;
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420extern struct lwkt_token pmap_token;
421extern struct lwkt_token dev_token;
d63ddd9c 422extern struct lwkt_token vm_token;
d39d3c43 423extern struct lwkt_token vmspace_token;
d63ddd9c 424extern struct lwkt_token kvm_token;
a8d3ab53 425extern struct lwkt_token sigio_token;
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426extern struct lwkt_token tty_token;
427extern struct lwkt_token vnode_token;
f635d174 428extern struct lwkt_token revoke_token;
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429
430/*
431 * Procedures
432 */
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433extern struct thread *lwkt_alloc_thread(struct thread *, int, int, int);
434extern void lwkt_init_thread(struct thread *, void *, int, int,
435 struct globaldata *);
e6546af9 436extern void lwkt_set_interrupt_support_thread(void);
fcefa6f2 437extern void lwkt_set_comm(thread_t, const char *, ...) __printflike(2, 3);
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438extern void lwkt_free_thread(struct thread *);
439extern void lwkt_gdinit(struct globaldata *);
8ad65e08 440extern void lwkt_switch(void);
cc9b6223 441extern void lwkt_switch_return(struct thread *);
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442extern void lwkt_preempt(thread_t, int);
443extern void lwkt_schedule(thread_t);
361d01dd 444extern void lwkt_schedule_noresched(thread_t);
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445extern void lwkt_schedule_self(thread_t);
446extern void lwkt_deschedule(thread_t);
447extern void lwkt_deschedule_self(thread_t);
f1d1c3fa 448extern void lwkt_yield(void);
40504122 449extern void lwkt_yield_quick(void);
3824f392 450extern void lwkt_user_yield(void);
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451extern void lwkt_hold(thread_t);
452extern void lwkt_rele(thread_t);
3824f392 453extern void lwkt_passive_release(thread_t);
4a28fe22 454extern void lwkt_maybe_splz(thread_t);
b9665ad7 455
3b998fa9 456extern void lwkt_gettoken(lwkt_token_t);
54341a3b 457extern void lwkt_gettoken_shared(lwkt_token_t);
4a28fe22 458extern void lwkt_gettoken_hard(lwkt_token_t);
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MD
459extern int lwkt_trytoken(lwkt_token_t);
460extern void lwkt_reltoken(lwkt_token_t);
4a28fe22 461extern void lwkt_reltoken_hard(lwkt_token_t);
b5d16701 462extern int lwkt_cnttoken(lwkt_token_t, thread_t);
b12defdc 463extern int lwkt_getalltokens(thread_t, int);
b9665ad7 464extern void lwkt_relalltokens(thread_t);
a3c18566 465extern void lwkt_token_init(lwkt_token_t, const char *);
b9665ad7 466extern void lwkt_token_uninit(lwkt_token_t);
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467
468extern void lwkt_token_pool_init(void);
c6fbe95a 469extern lwkt_token_t lwkt_token_pool_lookup(void *);
3b998fa9 470extern lwkt_token_t lwkt_getpooltoken(void *);
177e553a 471extern void lwkt_relpooltoken(void *);
41a01a4d 472
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473extern void lwkt_token_swap(void);
474
b9665ad7 475extern void lwkt_setpri(thread_t, int);
03bd0a5e 476extern void lwkt_setpri_initial(thread_t, int);
b9665ad7 477extern void lwkt_setpri_self(int);
85946b6c 478extern void lwkt_schedulerclock(thread_t td);
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479extern void lwkt_setcpu_self(struct globaldata *);
480extern void lwkt_migratecpu(int);
b8a98473 481
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482extern void lwkt_giveaway(struct thread *);
483extern void lwkt_acquire(struct thread *);
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484extern int lwkt_send_ipiq3(struct globaldata *, ipifunc3_t, void *, int);
485extern int lwkt_send_ipiq3_passive(struct globaldata *, ipifunc3_t,
486 void *, int);
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SW
487extern int lwkt_send_ipiq3_bycpu(int, ipifunc3_t, void *, int);
488extern int lwkt_send_ipiq3_mask(cpumask_t, ipifunc3_t, void *, int);
489extern void lwkt_wait_ipiq(struct globaldata *, int);
96728c05 490extern void lwkt_process_ipiq(void);
b9665ad7 491extern void lwkt_process_ipiq_frame(struct intrframe *);
b8a98473 492extern void lwkt_smp_stopped(void);
6c92c1f2 493extern void lwkt_synchronize_ipiqs(const char *);
b8a98473 494
d5b2d319 495/* lwkt_cpusync_init() - inline function in sys/thread2.h */
b9665ad7 496extern void lwkt_cpusync_simple(cpumask_t, cpusync_func_t, void *);
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497extern void lwkt_cpusync_interlock(lwkt_cpusync_t);
498extern void lwkt_cpusync_deinterlock(lwkt_cpusync_t);
3a24972f 499extern void lwkt_cpusync_quick(lwkt_cpusync_t);
b8a98473 500
4a28fe22 501extern void crit_panic(void) __dead2;
553ea3c8 502extern struct lwp *lwkt_preempted_proc(void);
4b5f931b 503
b9665ad7 504extern int lwkt_create (void (*func)(void *), void *, struct thread **,
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SW
505 struct thread *, int, int,
506 const char *, ...) __printflike(7, 8);
b153f746 507extern void lwkt_exit (void) __dead2;
e56e4dea 508extern void lwkt_remove_tdallq (struct thread *);
99df837e 509
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510#endif
511
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512#endif
513