ACPI: Remove unnecessary from/to-void* and to-void casts in drivers/acpi
[linux-2.6.git] / drivers / acpi / numa.c
1 /*
2  *  acpi_numa.c - ACPI NUMA support
3  *
4  *  Copyright (C) 2002 Takayoshi Kochi <t-kochi@bq.jp.nec.com>
5  *
6  * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
7  *
8  *  This program is free software; you can redistribute it and/or modify
9  *  it under the terms of the GNU General Public License as published by
10  *  the Free Software Foundation; either version 2 of the License, or
11  *  (at your option) any later version.
12  *
13  *  This program is distributed in the hope that it will be useful,
14  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
15  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
16  *  GNU General Public License for more details.
17  *
18  *  You should have received a copy of the GNU General Public License
19  *  along with this program; if not, write to the Free Software
20  *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
21  *
22  * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
23  *
24  */
25 #include <linux/module.h>
26 #include <linux/init.h>
27 #include <linux/kernel.h>
28 #include <linux/types.h>
29 #include <linux/errno.h>
30 #include <linux/acpi.h>
31 #include <acpi/acpi_bus.h>
32 #include <acpi/acmacros.h>
33
34 #define ACPI_NUMA       0x80000000
35 #define _COMPONENT      ACPI_NUMA
36 ACPI_MODULE_NAME("numa")
37
38 static nodemask_t nodes_found_map = NODE_MASK_NONE;
39 #define PXM_INVAL       -1
40 #define NID_INVAL       -1
41
42 /* maps to convert between proximity domain and logical node ID */
43 int __cpuinitdata pxm_to_node_map[MAX_PXM_DOMAINS]
44                                 = { [0 ... MAX_PXM_DOMAINS - 1] = NID_INVAL };
45 int __cpuinitdata node_to_pxm_map[MAX_NUMNODES]
46                                 = { [0 ... MAX_NUMNODES - 1] = PXM_INVAL };
47
48 extern int __init acpi_table_parse_madt_family(enum acpi_table_id id,
49                                                unsigned long madt_size,
50                                                int entry_id,
51                                                acpi_madt_entry_handler handler,
52                                                unsigned int max_entries);
53
54 int __cpuinit pxm_to_node(int pxm)
55 {
56         if (pxm < 0)
57                 return NID_INVAL;
58         return pxm_to_node_map[pxm];
59 }
60
61 int __cpuinit node_to_pxm(int node)
62 {
63         if (node < 0)
64                 return PXM_INVAL;
65         return node_to_pxm_map[node];
66 }
67
68 int __cpuinit acpi_map_pxm_to_node(int pxm)
69 {
70         int node = pxm_to_node_map[pxm];
71
72         if (node < 0){
73                 if (nodes_weight(nodes_found_map) >= MAX_NUMNODES)
74                         return NID_INVAL;
75                 node = first_unset_node(nodes_found_map);
76                 pxm_to_node_map[pxm] = node;
77                 node_to_pxm_map[node] = pxm;
78                 node_set(node, nodes_found_map);
79         }
80
81         return node;
82 }
83
84 void __cpuinit acpi_unmap_pxm_to_node(int node)
85 {
86         int pxm = node_to_pxm_map[node];
87         pxm_to_node_map[pxm] = NID_INVAL;
88         node_to_pxm_map[node] = PXM_INVAL;
89         node_clear(node, nodes_found_map);
90 }
91
92 void __init acpi_table_print_srat_entry(acpi_table_entry_header * header)
93 {
94
95         ACPI_FUNCTION_NAME("acpi_table_print_srat_entry");
96
97         if (!header)
98                 return;
99
100         switch (header->type) {
101
102         case ACPI_SRAT_PROCESSOR_AFFINITY:
103 #ifdef ACPI_DEBUG_OUTPUT
104                 {
105                         struct acpi_table_processor_affinity *p =
106                             (struct acpi_table_processor_affinity *)header;
107                         ACPI_DEBUG_PRINT((ACPI_DB_INFO,
108                                           "SRAT Processor (id[0x%02x] eid[0x%02x]) in proximity domain %d %s\n",
109                                           p->apic_id, p->lsapic_eid,
110                                           p->proximity_domain,
111                                           p->flags.
112                                           enabled ? "enabled" : "disabled"));
113                 }
114 #endif                          /* ACPI_DEBUG_OUTPUT */
115                 break;
116
117         case ACPI_SRAT_MEMORY_AFFINITY:
118 #ifdef ACPI_DEBUG_OUTPUT
119                 {
120                         struct acpi_table_memory_affinity *p =
121                             (struct acpi_table_memory_affinity *)header;
122                         ACPI_DEBUG_PRINT((ACPI_DB_INFO,
123                                           "SRAT Memory (0x%08x%08x length 0x%08x%08x type 0x%x) in proximity domain %d %s%s\n",
124                                           p->base_addr_hi, p->base_addr_lo,
125                                           p->length_hi, p->length_lo,
126                                           p->memory_type, p->proximity_domain,
127                                           p->flags.
128                                           enabled ? "enabled" : "disabled",
129                                           p->flags.
130                                           hot_pluggable ? " hot-pluggable" :
131                                           ""));
132                 }
133 #endif                          /* ACPI_DEBUG_OUTPUT */
134                 break;
135
136         default:
137                 printk(KERN_WARNING PREFIX
138                        "Found unsupported SRAT entry (type = 0x%x)\n",
139                        header->type);
140                 break;
141         }
142 }
143
144 static int __init acpi_parse_slit(unsigned long phys_addr, unsigned long size)
145 {
146         struct acpi_table_slit *slit;
147         u32 localities;
148
149         if (!phys_addr || !size)
150                 return -EINVAL;
151
152         slit = (struct acpi_table_slit *)__va(phys_addr);
153
154         /* downcast just for %llu vs %lu for i386/ia64  */
155         localities = (u32) slit->localities;
156
157         acpi_numa_slit_init(slit);
158
159         return 0;
160 }
161
162 static int __init
163 acpi_parse_processor_affinity(acpi_table_entry_header * header,
164                               const unsigned long end)
165 {
166         struct acpi_table_processor_affinity *processor_affinity;
167
168         processor_affinity = (struct acpi_table_processor_affinity *)header;
169         if (!processor_affinity)
170                 return -EINVAL;
171
172         acpi_table_print_srat_entry(header);
173
174         /* let architecture-dependent part to do it */
175         acpi_numa_processor_affinity_init(processor_affinity);
176
177         return 0;
178 }
179
180 static int __init
181 acpi_parse_memory_affinity(acpi_table_entry_header * header,
182                            const unsigned long end)
183 {
184         struct acpi_table_memory_affinity *memory_affinity;
185
186         memory_affinity = (struct acpi_table_memory_affinity *)header;
187         if (!memory_affinity)
188                 return -EINVAL;
189
190         acpi_table_print_srat_entry(header);
191
192         /* let architecture-dependent part to do it */
193         acpi_numa_memory_affinity_init(memory_affinity);
194
195         return 0;
196 }
197
198 static int __init acpi_parse_srat(unsigned long phys_addr, unsigned long size)
199 {
200         struct acpi_table_srat *srat;
201
202         if (!phys_addr || !size)
203                 return -EINVAL;
204
205         srat = (struct acpi_table_srat *)__va(phys_addr);
206
207         return 0;
208 }
209
210 int __init
211 acpi_table_parse_srat(enum acpi_srat_entry_id id,
212                       acpi_madt_entry_handler handler, unsigned int max_entries)
213 {
214         return acpi_table_parse_madt_family(ACPI_SRAT,
215                                             sizeof(struct acpi_table_srat), id,
216                                             handler, max_entries);
217 }
218
219 int __init acpi_numa_init(void)
220 {
221         int result;
222
223         /* SRAT: Static Resource Affinity Table */
224         result = acpi_table_parse(ACPI_SRAT, acpi_parse_srat);
225
226         if (result > 0) {
227                 result = acpi_table_parse_srat(ACPI_SRAT_PROCESSOR_AFFINITY,
228                                                acpi_parse_processor_affinity,
229                                                NR_CPUS);
230                 result = acpi_table_parse_srat(ACPI_SRAT_MEMORY_AFFINITY, acpi_parse_memory_affinity, NR_NODE_MEMBLKS); // IA64 specific
231         }
232
233         /* SLIT: System Locality Information Table */
234         result = acpi_table_parse(ACPI_SLIT, acpi_parse_slit);
235
236         acpi_numa_arch_fixup();
237         return 0;
238 }
239
240 int acpi_get_pxm(acpi_handle h)
241 {
242         unsigned long pxm;
243         acpi_status status;
244         acpi_handle handle;
245         acpi_handle phandle = h;
246
247         do {
248                 handle = phandle;
249                 status = acpi_evaluate_integer(handle, "_PXM", NULL, &pxm);
250                 if (ACPI_SUCCESS(status))
251                         return pxm;
252                 status = acpi_get_parent(handle, &phandle);
253         } while (ACPI_SUCCESS(status));
254         return -1;
255 }
256 EXPORT_SYMBOL(acpi_get_pxm);
257
258 int acpi_get_node(acpi_handle *handle)
259 {
260         int pxm, node = -1;
261
262         pxm = acpi_get_pxm(handle);
263         if (pxm >= 0)
264                 node = acpi_map_pxm_to_node(pxm);
265
266         return node;
267 }
268 EXPORT_SYMBOL(acpi_get_node);