usr/src/uts/common/sys/pg.h

   1 /*
   2  * CDDL HEADER START
   3  *
   4  * The contents of this file are subject to the terms of the
   5  * Common Development and Distribution License (the "License").
   6  * You may not use this file except in compliance with the License.
   7  *
   8  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
   9  * or http://www.opensolaris.org/os/licensing.
  10  * See the License for the specific language governing permissions
  11  * and limitations under the License.
  12  *
  13  * When distributing Covered Code, include this CDDL HEADER in each
  14  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
  15  * If applicable, add the following below this CDDL HEADER, with the
  16  * fields enclosed by brackets "[]" replaced with your own identifying
  17  * information: Portions Copyright [yyyy] [name of copyright owner]
  18  *
  19  * CDDL HEADER END
  20  */
  21
  22 /*
  23  * Copyright (c) 2010, Oracle and/or its affiliates. All rights reserved.
  24  */
  25
  26 #ifndef _PG_H
  27 #define _PG_H
  28
  29 /*
  30  * Processor Groups
  31  */
  32
  33 #ifdef  __cplusplus
  34 extern "C" {
  35 #endif
  36
  37 #if (defined(_KERNEL) || defined(_KMEMUSER))
  38 #include <sys/cpuvar.h>
  39 #include <sys/group.h>
  40 #include <sys/processor.h>
  41 #include <sys/bitset.h>
  42 #include <sys/atomic.h>
  43 #include <sys/types.h>
  44 #include <sys/kstat.h>
  45
  46 typedef int             pgid_t;         /* processor group id */
  47 typedef uint_t          pg_cid_t;       /* processor group class id */
  48
  49 struct pg;
  50
  51 /*
  52  * Nature of CPU relationships
  53  */
  54 typedef enum pg_relation {
  55         PGR_LOGICAL,
  56         PGR_PHYSICAL
  57 } pg_relation_t;
  58
  59 /*
  60  * Processor Group callbacks ops vector
  61  * These provide a mechanism allowing per PG routines to invoked
  62  * in response to events.
  63  */
  64 typedef struct pg_cb_ops {
  65         void            (*thread_swtch)(struct pg *, struct cpu *, hrtime_t,
  66                             kthread_t *, kthread_t *);
  67         void            (*thread_remain)(struct pg *, struct cpu *,
  68                             kthread_t *);
  69 } pg_cb_ops_t;
  70
  71 /*
  72  * Processor group structure
  73  */
  74 typedef struct pg {
  75         pgid_t                  pg_id;          /* seq id */
  76         pg_relation_t           pg_relation;    /* grouping relationship */
  77         struct pg_class         *pg_class;      /* pg class */
  78         struct group            pg_cpus;        /* group of CPUs */
  79         pg_cb_ops_t             pg_cb;          /* pg events ops vector */
  80 } pg_t;
  81
  82 /*
  83  * PG class callbacks
  84  */
  85 struct pg_ops {
  86         struct pg       *(*alloc)();
  87         void            (*free)(struct pg *);
  88         void            (*cpu_init)(struct cpu *, struct cpu_pg *);
  89         void            (*cpu_fini)(struct cpu *, struct cpu_pg *);
  90         void            (*cpu_active)(struct cpu *);
  91         void            (*cpu_inactive)(struct cpu *);
  92         void            (*cpupart_in)(struct cpu *, struct cpupart *);
  93         void            (*cpupart_out)(struct cpu *, struct cpupart *);
  94         void            (*cpupart_move)(struct cpu *, struct cpupart *,
  95                             struct cpupart *);
  96         int             (*cpu_belongs)(struct pg *, struct cpu *);
  97         char            *(*policy_name)(struct pg *);
  98 };
  99
 100 #define PG_CLASS_NAME_MAX 32
 101
 102 /*
 103  * PG class structure
 104  */
 105 typedef struct pg_class {
 106         pg_cid_t        pgc_id;
 107         char            pgc_name[PG_CLASS_NAME_MAX];
 108         struct pg_ops   *pgc_ops;
 109         pg_relation_t   pgc_relation;
 110 } pg_class_t;
 111
 112 /*
 113  * Per CPU processor group data
 114  */
 115 typedef struct cpu_pg {
 116         struct group    pgs;            /* All the CPU's PGs */
 117         struct group    cmt_pgs;        /* CMT load balancing lineage */
 118                                         /* (Group hierarchy ordered) */
 119         struct pg       *cmt_lineage;   /* Ascending lineage chain */
 120 } cpu_pg_t;
 121
 122 /*
 123  * PG cpu iterator cookie
 124  */
 125 typedef struct  pg_cpu_itr {
 126         pg_t            *pg;
 127         group_iter_t    position;
 128 } pg_cpu_itr_t;
 129
 130 /*
 131  * Initialize a PG CPU iterator cookie
 132  */
 133 #define PG_CPU_ITR_INIT(pgrp, itr)              \
 134 {                                               \
 135         group_iter_init(&(itr).position);       \
 136         (itr).pg = ((pg_t *)pgrp);              \
 137 }
 138
 139 /*
 140  * Return the first CPU in a PG
 141  */
 142 #define PG_CPU_GET_FIRST(pgrp)                  \
 143         (GROUP_SIZE(&((pg_t *)pgrp)->pg_cpus) > 0 ?     \
 144             GROUP_ACCESS(&((pg_t *)pgrp)->pg_cpus, 0) : NULL)
 145
 146 /*
 147  * Return the number of CPUs in a PG
 148  */
 149 #define PG_NUM_CPUS(pgrp)                       \
 150         (GROUP_SIZE(&(pgrp)->pg_cpus))
 151
 152 /*
 153  * Framework routines
 154  */
 155 void            pg_init(void);
 156 pg_cid_t        pg_class_register(char *, struct pg_ops *, pg_relation_t);
 157
 158 /*
 159  * PG CPU reconfiguration hooks
 160  */
 161 void            pg_cpu0_init(void);
 162 cpu_pg_t        *pg_cpu_init(cpu_t *, boolean_t deferred_init);
 163 void            pg_cpu_fini(cpu_t *, cpu_pg_t *cpu_pg_deferred);
 164 void            pg_cpu_active(cpu_t *);
 165 void            pg_cpu_inactive(cpu_t *);
 166 void            pg_cpu_startup(cpu_t *);
 167 void            pg_cpu_bootstrap(cpu_t *);
 168 int             pg_cpu_is_bootstrapped(cpu_t *);
 169
 170 /*
 171  * PG cpupart service hooks
 172  */
 173 void            pg_cpupart_in(cpu_t *, struct cpupart *);
 174 void            pg_cpupart_out(cpu_t *, struct cpupart *);
 175 void            pg_cpupart_move(cpu_t *, struct cpupart *, struct cpupart *);
 176
 177 /*
 178  * PG CPU utility routines
 179  */
 180 pg_t            *pg_create(pg_cid_t);
 181 void            pg_destroy(pg_t *);
 182 void            pg_cpu_add(pg_t *, cpu_t *, cpu_pg_t *);
 183 void            pg_cpu_delete(pg_t *, cpu_t *, cpu_pg_t *);
 184 pg_t            *pg_cpu_find_pg(cpu_t *, group_t *);
 185 cpu_t           *pg_cpu_next(pg_cpu_itr_t *);
 186 boolean_t       pg_cpu_find(pg_t *, cpu_t *);
 187
 188 /*
 189  * PG Event callbacks
 190  */
 191 void            pg_callback_set_defaults(pg_t *);
 192 void            pg_ev_thread_swtch(cpu_t *, hrtime_t, kthread_t *, kthread_t *);
 193 void            pg_ev_thread_remain(cpu_t *, kthread_t *);
 194
 195 /*
 196  * PG Observability interfaces
 197  */
 198 char            *pg_policy_name(pg_t *);
 199
 200 #endif  /* !_KERNEL && !_KMEMUSER */
 201
 202 #ifdef  __cplusplus
 203 }
 204 #endif
 205
 206 #endif /* _PG_H */