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gerrit-public.fairphone.software / kernel / msm-4.19 / 056b5033fb8d16095fb074fc910fad90186374f3 / . / drivers / base / node.c
blob: 583d57ec49a822f0f30305526d456141662bec38 [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]1/*
2 * drivers/base/node.c - basic Node class support
3 */
4
5#include <linux/sysdev.h>
6#include <linux/module.h>
7#include <linux/init.h>
8#include <linux/mm.h>
9#include <linux/node.h>
10#include <linux/hugetlb.h>
11#include <linux/cpumask.h>
12#include <linux/topology.h>
13#include <linux/nodemask.h>
14
15static struct sysdev_class node_class = {
16 set_kset_name("node"),
17};
18
19
20static ssize_t node_read_cpumap(struct sys_device * dev, char * buf)
21{
22 struct node *node_dev = to_node(dev);
23 cpumask_t mask = node_to_cpumask(node_dev->sysdev.id);
24 int len;
25
26 /* 2004/06/03: buf currently PAGE_SIZE, need > 1 char per 4 bits. */
27 BUILD_BUG_ON(MAX_NUMNODES/4 > PAGE_SIZE/2);
28
29 len = cpumask_scnprintf(buf, PAGE_SIZE-1, mask);
30 len += sprintf(buf + len, "\n");
31 return len;
32}
33
34static SYSDEV_ATTR(cpumap, S_IRUGO, node_read_cpumap, NULL);
35
36#define K(x) ((x) << (PAGE_SHIFT - 10))
37static ssize_t node_read_meminfo(struct sys_device * dev, char * buf)
38{
39 int n;
40 int nid = dev->id;
41 struct sysinfo i;
42 unsigned long inactive;
43 unsigned long active;
44 unsigned long free;
45
46 si_meminfo_node(&i, nid);
47 __get_zone_counts(&active, &inactive, &free, NODE_DATA(nid));
48
49 n = sprintf(buf, "\n"
50 "Node %d MemTotal: %8lu kB\n"
51 "Node %d MemFree: %8lu kB\n"
52 "Node %d MemUsed: %8lu kB\n"
53 "Node %d Active: %8lu kB\n"
54 "Node %d Inactive: %8lu kB\n"
55 "Node %d HighTotal: %8lu kB\n"
56 "Node %d HighFree: %8lu kB\n"
57 "Node %d LowTotal: %8lu kB\n"
58 "Node %d LowFree: %8lu kB\n",
59 nid, K(i.totalram),
60 nid, K(i.freeram),
61 nid, K(i.totalram - i.freeram),
62 nid, K(active),
63 nid, K(inactive),
64 nid, K(i.totalhigh),
65 nid, K(i.freehigh),
66 nid, K(i.totalram - i.totalhigh),
67 nid, K(i.freeram - i.freehigh));
68 n += hugetlb_report_node_meminfo(nid, buf + n);
69 return n;
70}
71
72#undef K
73static SYSDEV_ATTR(meminfo, S_IRUGO, node_read_meminfo, NULL);
74
75static ssize_t node_read_numastat(struct sys_device * dev, char * buf)
76{
77 unsigned long numa_hit, numa_miss, interleave_hit, numa_foreign;
78 unsigned long local_node, other_node;
79 int i, cpu;
80 pg_data_t *pg = NODE_DATA(dev->id);
81 numa_hit = 0;
82 numa_miss = 0;
83 interleave_hit = 0;
84 numa_foreign = 0;
85 local_node = 0;
86 other_node = 0;
87 for (i = 0; i < MAX_NR_ZONES; i++) {
88 struct zone *z = &pg->node_zones[i];
89 for (cpu = 0; cpu < NR_CPUS; cpu++) {
90 struct per_cpu_pageset *ps = &z->pageset[cpu];
91 numa_hit += ps->numa_hit;
92 numa_miss += ps->numa_miss;
93 numa_foreign += ps->numa_foreign;
94 interleave_hit += ps->interleave_hit;
95 local_node += ps->local_node;
96 other_node += ps->other_node;
97 }
98 }
99 return sprintf(buf,
100 "numa_hit %lu\n"
101 "numa_miss %lu\n"
102 "numa_foreign %lu\n"
103 "interleave_hit %lu\n"
104 "local_node %lu\n"
105 "other_node %lu\n",
106 numa_hit,
107 numa_miss,
108 numa_foreign,
109 interleave_hit,
110 local_node,
111 other_node);
112}
113static SYSDEV_ATTR(numastat, S_IRUGO, node_read_numastat, NULL);
114
115static ssize_t node_read_distance(struct sys_device * dev, char * buf)
116{
117 int nid = dev->id;
118 int len = 0;
119 int i;
120
121 /* buf currently PAGE_SIZE, need ~4 chars per node */
122 BUILD_BUG_ON(MAX_NUMNODES*4 > PAGE_SIZE/2);
123
124 for_each_online_node(i)
125 len += sprintf(buf + len, "%s%d", i ? " " : "", node_distance(nid, i));
126
127 len += sprintf(buf + len, "\n");
128 return len;
129}
130static SYSDEV_ATTR(distance, S_IRUGO, node_read_distance, NULL);
131
132
133/*
134 * register_node - Setup a driverfs device for a node.
135 * @num - Node number to use when creating the device.
136 *
137 * Initialize and register the node device.
138 */
139int __init register_node(struct node *node, int num, struct node *parent)
140{
141 int error;
142
143 node->sysdev.id = num;
144 node->sysdev.cls = &node_class;
145 error = sysdev_register(&node->sysdev);
146
147 if (!error){
148 sysdev_create_file(&node->sysdev, &attr_cpumap);
149 sysdev_create_file(&node->sysdev, &attr_meminfo);
150 sysdev_create_file(&node->sysdev, &attr_numastat);
151 sysdev_create_file(&node->sysdev, &attr_distance);
152 }
153 return error;
154}
155
156
157int __init register_node_type(void)
158{
159 return sysdev_class_register(&node_class);
160}
161postcore_initcall(register_node_type);