sys/sys/cpu_topology.h

   1 /*-
   2  * Copyright (c) 2021 The DragonFly Project.  All rights reserved.
   3  *
   4  * Redistribution and use in source and binary forms, with or without
   5  * modification, are permitted provided that the following conditions
   6  * are met:
   7  *
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in
  12  *    the documentation and/or other materials provided with the
  13  *    distribution.
  14  * 3. Neither the name of The DragonFly Project nor the names of its
  15  *    contributors may be used to endorse or promote products derived
  16  *    from this software without specific, prior written permission.
  17  *
  18  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  19  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  20  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
  21  * FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE
  22  * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
  23  * INCIDENTAL, SPECIAL, EXEMPLARY OR CONSEQUENTIAL DAMAGES (INCLUDING,
  24  * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  25  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
  26  * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
  27  * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
  28  * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  29  * SUCH DAMAGE.
  30  */
  31
  32 #ifndef _SYS_CPU_TOPOLOGY_H_
  33 #define _SYS_CPU_TOPOLOGY_H_
  34
  35 #if defined(_KERNEL) || defined(_KERNEL_STRUCTURES)
  36
  37 #include <sys/param.h>
  38 #include <sys/cpumask.h>
  39
  40 /* CPU TOPOLOGY DATA AND FUNCTIONS */
  41 struct cpu_node {
  42         struct cpu_node * parent_node;
  43         struct cpu_node * child_node[MAXCPU];
  44         uint32_t child_no;
  45         uint32_t unused01;
  46         cpumask_t members;
  47         uint8_t type;
  48         uint8_t compute_unit_id; /* AMD compute unit ID */
  49         uint8_t unused02;
  50         uint8_t unused03;
  51         long    phys_mem;       /* supplied from vm_numa_organize() */
  52 };
  53 typedef struct cpu_node cpu_node_t;
  54
  55 #define LEVEL_NO 4
  56
  57 /* Level type for CPU siblings */
  58 #define PACKAGE_LEVEL   1
  59 #define CHIP_LEVEL      2
  60 #define CORE_LEVEL      3
  61 #define THREAD_LEVEL    4
  62
  63 #define CPUSET_FOREACH(cpu, mask)                       \
  64         for ((cpu) = 0; (cpu) < ncpus; (cpu)++)         \
  65                 if (CPUMASK_TESTBIT(mask, cpu))
  66
  67 #endif
  68
  69 #if defined(_KERNEL)
  70
  71 extern int cpu_topology_levels_number;
  72 extern int cpu_topology_ht_ids;
  73 extern int cpu_topology_core_ids;
  74 extern int cpu_topology_phys_ids;
  75 extern cpu_node_t *root_cpu_node;
  76
  77 cpumask_t get_cpumask_from_level(int cpuid, uint8_t level_type);
  78 cpu_node_t *get_cpu_node_by_cpuid(int cpuid);
  79 const cpu_node_t *get_cpu_node_by_chipid(int chip_id);
  80 long get_highest_node_memory(void);
  81 int get_cpu_ht_id(int cpuid);
  82 int get_cpu_core_id(int cpuid);
  83 int get_cpu_phys_id(int cpuid);
  84
  85 #endif /* _KERNEL */
  86 #endif /* !_SYS_CPU_TOPOLOGY_H_ */