osfmk/kern/timer_call.h

   1 /*
   2  * Copyright (c) 1993-1995, 1999-2008 Apple Inc. All rights reserved.
   3  *
   4  * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
   5  *
   6  * This file contains Original Code and/or Modifications of Original Code
   7  * as defined in and that are subject to the Apple Public Source License
   8  * Version 2.0 (the 'License'). You may not use this file except in
   9  * compliance with the License. The rights granted to you under the License
  10  * may not be used to create, or enable the creation or redistribution of,
  11  * unlawful or unlicensed copies of an Apple operating system, or to
  12  * circumvent, violate, or enable the circumvention or violation of, any
  13  * terms of an Apple operating system software license agreement.
  14  *
  15  * Please obtain a copy of the License at
  16  * http://www.opensource.apple.com/apsl/ and read it before using this file.
  17  *
  18  * The Original Code and all software distributed under the License are
  19  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  20  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  21  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  22  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  23  * Please see the License for the specific language governing rights and
  24  * limitations under the License.
  25  *
  26  * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
  27  */
  28 /*
  29  * Declarations for timer interrupt callouts.
  30  */
  31
  32 #ifndef _KERN_TIMER_CALL_H_
  33 #define _KERN_TIMER_CALL_H_
  34
  35 #include <mach/mach_types.h>
  36 #include <kern/kern_types.h>
  37
  38 #ifdef XNU_KERNEL_PRIVATE
  39
  40 #include <kern/call_entry.h>
  41 #include <kern/simple_lock.h>
  42
  43 #ifdef MACH_KERNEL_PRIVATE
  44 #include <kern/queue.h>
  45
  46 extern boolean_t mach_timer_coalescing_enabled;
  47 extern void timer_call_queue_init(mpqueue_head_t *);
  48 #endif
  49
  50 /*
  51  * NOTE: for now, bsd/dev/dtrace/dtrace_glue.c has its own definition
  52  * of this data structure, and the two had better match.
  53  */
  54 typedef struct timer_call {
  55         struct call_entry       call_entry;
  56         decl_simple_lock_data( ,lock);          /* protects call_entry queue */
  57         uint64_t                soft_deadline;
  58         uint32_t                flags;
  59         boolean_t               async_dequeue;  /* this field is protected by
  60                                                    call_entry queue's lock */
  61         uint64_t                ttd; /* Time to deadline at creation */
  62 } timer_call_data_t, *timer_call_t;
  63
  64 #define EndOfAllTime            0xFFFFFFFFFFFFFFFFULL
  65
  66 typedef void            *timer_call_param_t;
  67 typedef void            (*timer_call_func_t)(
  68                                 timer_call_param_t      param0,
  69                                 timer_call_param_t      param1);
  70
  71 /*
  72  * Flags to alter the default timer/timeout coalescing behavior
  73  * on a per-timer_call basis.
  74  *
  75  * The SYS urgency classes indicate that the timer_call is not
  76  * directly related to the current thread at the time the timer_call
  77  * is entered, so it is ignored in the calculation entirely (only
  78  * the subclass specified is used).
  79  *
  80  * The USER flags indicate that both the current thread scheduling and QoS
  81  * attributes, in addition to the per-timer_call urgency specification,
  82  * are used to establish coalescing behavior.
  83  */
  84 #define TIMER_CALL_SYS_NORMAL           TIMEOUT_URGENCY_SYS_NORMAL
  85 #define TIMER_CALL_SYS_CRITICAL         TIMEOUT_URGENCY_SYS_CRITICAL
  86 #define TIMER_CALL_SYS_BACKGROUND       TIMEOUT_URGENCY_SYS_BACKGROUND
  87
  88 #define TIMER_CALL_USER_MASK            TIMEOUT_URGENCY_USER_MASK
  89 #define TIMER_CALL_USER_NORMAL          TIMEOUT_URGENCY_USER_NORMAL
  90 #define TIMER_CALL_USER_CRITICAL        TIMEOUT_URGENCY_USER_CRITICAL
  91 #define TIMER_CALL_USER_BACKGROUND      TIMEOUT_URGENCY_USER_BACKGROUND
  92
  93 #define TIMER_CALL_URGENCY_MASK         TIMEOUT_URGENCY_MASK
  94
  95 /*
  96  * Indicate that a specific leeway value is being provided (otherwise
  97  * the leeway parameter is ignored).  This supplied value can currently
  98  * only be used to extend the leeway calculated internally from the
  99  * urgency class provided.
 100  */
 101 #define TIMER_CALL_LEEWAY               TIMEOUT_URGENCY_LEEWAY
 102
 103 /*
 104  * Non-migratable timer_call
 105  */
 106 #define TIMER_CALL_LOCAL                TIMEOUT_URGENCY_FIRST_AVAIL
 107 #define TIMER_CALL_RATELIMITED          TIMEOUT_URGENCY_RATELIMITED
 108 extern boolean_t        timer_call_enter(
 109                                 timer_call_t    call,
 110                                 uint64_t        deadline,
 111                                 uint32_t        flags);
 112
 113 extern boolean_t        timer_call_enter1(
 114                                 timer_call_t            call,
 115                                 timer_call_param_t      param1,
 116                                 uint64_t                deadline,
 117                                 uint32_t                flags);
 118
 119 extern boolean_t        timer_call_enter_with_leeway(
 120                                                 timer_call_t            call,
 121                                                 timer_call_param_t      param1,
 122                                                 uint64_t                deadline,
 123                                                 uint64_t                leeway,
 124                                                 uint32_t                flags,
 125                                                 boolean_t               ratelimited);
 126
 127 extern boolean_t        timer_call_cancel(
 128                                 timer_call_t    call);
 129
 130 extern void             timer_call_init(void);
 131
 132 extern void             timer_call_setup(
 133                                 timer_call_t            call,
 134                                 timer_call_func_t       func,
 135                                 timer_call_param_t      param0);
 136
 137 extern int timer_get_user_idle_level(void);
 138 extern kern_return_t timer_set_user_idle_level(int ilevel);
 139
 140 #define NUM_LATENCY_QOS_TIERS (6)
 141 typedef struct {
 142         uint32_t powergate_latency_abstime;
 143
 144         uint32_t idle_entry_timer_processing_hdeadline_threshold_abstime;
 145         uint32_t interrupt_timer_coalescing_ilat_threshold_abstime;
 146         uint32_t timer_resort_threshold_abstime;
 147
 148         int32_t timer_coalesce_rt_shift;
 149         int32_t timer_coalesce_bg_shift;
 150         int32_t timer_coalesce_kt_shift;
 151         int32_t timer_coalesce_fp_shift;
 152         int32_t timer_coalesce_ts_shift;
 153
 154         uint64_t timer_coalesce_rt_abstime_max;
 155         uint64_t timer_coalesce_bg_abstime_max;
 156         uint64_t timer_coalesce_kt_abstime_max;
 157         uint64_t timer_coalesce_fp_abstime_max;
 158         uint64_t timer_coalesce_ts_abstime_max;
 159
 160         uint32_t latency_qos_scale[NUM_LATENCY_QOS_TIERS];
 161         uint64_t latency_qos_abstime_max[NUM_LATENCY_QOS_TIERS];
 162         boolean_t latency_tier_rate_limited[NUM_LATENCY_QOS_TIERS];
 163 } timer_coalescing_priority_params_t;
 164 extern timer_coalescing_priority_params_t tcoal_prio_params;
 165
 166 #endif /* XNU_KERNEL_PRIVATE */
 167
 168 #endif /* _KERN_TIMER_CALL_H_ */