iwlwifi: adding pci device ids to iwl_hw_card_ids
[linux-2.6] / drivers / base / topology.c
1 /*
2  * driver/base/topology.c - Populate sysfs with cpu topology information
3  *
4  * Written by: Zhang Yanmin, Intel Corporation
5  *
6  * Copyright (C) 2006, Intel Corp.
7  *
8  * All rights reserved.
9  *
10  * This program is free software; you can redistribute it and/or modify
11  * it under the terms of the GNU General Public License as published by
12  * the Free Software Foundation; either version 2 of the License, or
13  * (at your option) any later version.
14  *
15  * This program is distributed in the hope that it will be useful, but
16  * WITHOUT ANY WARRANTY; without even the implied warranty of
17  * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
18  * NON INFRINGEMENT.  See the GNU General Public License for more
19  * details.
20  *
21  * You should have received a copy of the GNU General Public License
22  * along with this program; if not, write to the Free Software
23  * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
24  *
25  */
26 #include <linux/sysdev.h>
27 #include <linux/init.h>
28 #include <linux/mm.h>
29 #include <linux/cpu.h>
30 #include <linux/module.h>
31 #include <linux/topology.h>
32
33 #define define_one_ro(_name)            \
34 static SYSDEV_ATTR(_name, 0444, show_##_name, NULL)
35
36 #define define_id_show_func(name)                               \
37 static ssize_t show_##name(struct sys_device *dev, char *buf)   \
38 {                                                               \
39         unsigned int cpu = dev->id;                             \
40         return sprintf(buf, "%d\n", topology_##name(cpu));      \
41 }
42
43 static ssize_t show_cpumap(int type, cpumask_t *mask, char *buf)
44 {
45         ptrdiff_t len = PTR_ALIGN(buf + PAGE_SIZE - 1, PAGE_SIZE) - buf;
46         int n = 0;
47
48         if (len > 1) {
49                 n = type?
50                         cpulist_scnprintf(buf, len-2, *mask):
51                         cpumask_scnprintf(buf, len-2, *mask);
52                 buf[n++] = '\n';
53                 buf[n] = '\0';
54         }
55         return n;
56 }
57
58 #define define_siblings_show_map(name)                                  \
59 static inline ssize_t show_##name(struct sys_device *dev, char *buf)    \
60 {                                                                       \
61         unsigned int cpu = dev->id;                                     \
62         return show_cpumap(0, &(topology_##name(cpu)), buf);            \
63 }
64
65 #define define_siblings_show_list(name)                                 \
66 static inline ssize_t show_##name##_list(struct sys_device *dev, char *buf) \
67 {                                                                       \
68         unsigned int cpu = dev->id;                                     \
69         return show_cpumap(1, &(topology_##name(cpu)), buf);            \
70 }
71
72 #define define_siblings_show_func(name)         \
73         define_siblings_show_map(name); define_siblings_show_list(name)
74
75 #ifdef  topology_physical_package_id
76 define_id_show_func(physical_package_id);
77 define_one_ro(physical_package_id);
78 #define ref_physical_package_id_attr    &attr_physical_package_id.attr,
79 #else
80 #define ref_physical_package_id_attr
81 #endif
82
83 #ifdef topology_core_id
84 define_id_show_func(core_id);
85 define_one_ro(core_id);
86 #define ref_core_id_attr                &attr_core_id.attr,
87 #else
88 #define ref_core_id_attr
89 #endif
90
91 #ifdef topology_thread_siblings
92 define_siblings_show_func(thread_siblings);
93 define_one_ro(thread_siblings);
94 define_one_ro(thread_siblings_list);
95 #define ref_thread_siblings_attr        \
96                 &attr_thread_siblings.attr, &attr_thread_siblings_list.attr,
97 #else
98 #define ref_thread_siblings_attr
99 #endif
100
101 #ifdef topology_core_siblings
102 define_siblings_show_func(core_siblings);
103 define_one_ro(core_siblings);
104 define_one_ro(core_siblings_list);
105 #define ref_core_siblings_attr          \
106                 &attr_core_siblings.attr, &attr_core_siblings_list.attr,
107 #else
108 #define ref_core_siblings_attr
109 #endif
110
111 static struct attribute *default_attrs[] = {
112         ref_physical_package_id_attr
113         ref_core_id_attr
114         ref_thread_siblings_attr
115         ref_core_siblings_attr
116         NULL
117 };
118
119 static struct attribute_group topology_attr_group = {
120         .attrs = default_attrs,
121         .name = "topology"
122 };
123
124 /* Add/Remove cpu_topology interface for CPU device */
125 static int __cpuinit topology_add_dev(unsigned int cpu)
126 {
127         struct sys_device *sys_dev = get_cpu_sysdev(cpu);
128
129         return sysfs_create_group(&sys_dev->kobj, &topology_attr_group);
130 }
131
132 static void __cpuinit topology_remove_dev(unsigned int cpu)
133 {
134         struct sys_device *sys_dev = get_cpu_sysdev(cpu);
135
136         sysfs_remove_group(&sys_dev->kobj, &topology_attr_group);
137 }
138
139 static int __cpuinit topology_cpu_callback(struct notifier_block *nfb,
140                                            unsigned long action, void *hcpu)
141 {
142         unsigned int cpu = (unsigned long)hcpu;
143         int rc = 0;
144
145         switch (action) {
146         case CPU_UP_PREPARE:
147         case CPU_UP_PREPARE_FROZEN:
148                 rc = topology_add_dev(cpu);
149                 break;
150         case CPU_UP_CANCELED:
151         case CPU_UP_CANCELED_FROZEN:
152         case CPU_DEAD:
153         case CPU_DEAD_FROZEN:
154                 topology_remove_dev(cpu);
155                 break;
156         }
157         return rc ? NOTIFY_BAD : NOTIFY_OK;
158 }
159
160 static int __cpuinit topology_sysfs_init(void)
161 {
162         int cpu;
163         int rc;
164
165         for_each_online_cpu(cpu) {
166                 rc = topology_add_dev(cpu);
167                 if (rc)
168                         return rc;
169         }
170         hotcpu_notifier(topology_cpu_callback, 0);
171
172         return 0;
173 }
174
175 device_initcall(topology_sysfs_init);