[PATCH] Unify pxm_to_node() and node_to_pxm()
[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/config.h>
27 #include <linux/init.h>
28 #include <linux/kernel.h>
29 #include <linux/types.h>
30 #include <linux/errno.h>
31 #include <linux/acpi.h>
32 #include <acpi/acpi_bus.h>
33 #include <acpi/acmacros.h>
34
35 #define ACPI_NUMA       0x80000000
36 #define _COMPONENT      ACPI_NUMA
37 ACPI_MODULE_NAME("numa")
38
39 static nodemask_t nodes_found_map = NODE_MASK_NONE;
40 #define PXM_INVAL       -1
41 #define NID_INVAL       -1
42
43 /* maps to convert between proximity domain and logical node ID */
44 int __cpuinitdata pxm_to_node_map[MAX_PXM_DOMAINS]
45                                 = { [0 ... MAX_PXM_DOMAINS - 1] = NID_INVAL };
46 int __cpuinitdata node_to_pxm_map[MAX_NUMNODES]
47                                 = { [0 ... MAX_NUMNODES - 1] = PXM_INVAL };
48
49 extern int __init acpi_table_parse_madt_family(enum acpi_table_id id,
50                                                unsigned long madt_size,
51                                                int entry_id,
52                                                acpi_madt_entry_handler handler,
53                                                unsigned int max_entries);
54
55 int __cpuinit pxm_to_node(int pxm)
56 {
57         if (pxm < 0)
58                 return NID_INVAL;
59         return pxm_to_node_map[pxm];
60 }
61
62 int __cpuinit node_to_pxm(int node)
63 {
64         if (node < 0)
65                 return PXM_INVAL;
66         return node_to_pxm_map[node];
67 }
68
69 int __cpuinit acpi_map_pxm_to_node(int pxm)
70 {
71         int node = pxm_to_node_map[pxm];
72
73         if (node < 0){
74                 if (nodes_weight(nodes_found_map) >= MAX_NUMNODES)
75                         return NID_INVAL;
76                 node = first_unset_node(nodes_found_map);
77                 pxm_to_node_map[pxm] = node;
78                 node_to_pxm_map[node] = pxm;
79                 node_set(node, nodes_found_map);
80         }
81
82         return node;
83 }
84
85 void __cpuinit acpi_unmap_pxm_to_node(int node)
86 {
87         int pxm = node_to_pxm_map[node];
88         pxm_to_node_map[pxm] = NID_INVAL;
89         node_to_pxm_map[node] = PXM_INVAL;
90         node_clear(node, nodes_found_map);
91 }
92
93 void __init acpi_table_print_srat_entry(acpi_table_entry_header * header)
94 {
95
96         ACPI_FUNCTION_NAME("acpi_table_print_srat_entry");
97
98         if (!header)
99                 return;
100
101         switch (header->type) {
102
103         case ACPI_SRAT_PROCESSOR_AFFINITY:
104 #ifdef ACPI_DEBUG_OUTPUT
105                 {
106                         struct acpi_table_processor_affinity *p =
107                             (struct acpi_table_processor_affinity *)header;
108                         ACPI_DEBUG_PRINT((ACPI_DB_INFO,
109                                           "SRAT Processor (id[0x%02x] eid[0x%02x]) in proximity domain %d %s\n",
110                                           p->apic_id, p->lsapic_eid,
111                                           p->proximity_domain,
112                                           p->flags.
113                                           enabled ? "enabled" : "disabled"));
114                 }
115 #endif                          /* ACPI_DEBUG_OUTPUT */
116                 break;
117
118         case ACPI_SRAT_MEMORY_AFFINITY:
119 #ifdef ACPI_DEBUG_OUTPUT
120                 {
121                         struct acpi_table_memory_affinity *p =
122                             (struct acpi_table_memory_affinity *)header;
123                         ACPI_DEBUG_PRINT((ACPI_DB_INFO,
124                                           "SRAT Memory (0x%08x%08x length 0x%08x%08x type 0x%x) in proximity domain %d %s%s\n",
125                                           p->base_addr_hi, p->base_addr_lo,
126                                           p->length_hi, p->length_lo,
127                                           p->memory_type, p->proximity_domain,
128                                           p->flags.
129                                           enabled ? "enabled" : "disabled",
130                                           p->flags.
131                                           hot_pluggable ? " hot-pluggable" :
132                                           ""));
133                 }
134 #endif                          /* ACPI_DEBUG_OUTPUT */
135                 break;
136
137         default:
138                 printk(KERN_WARNING PREFIX
139                        "Found unsupported SRAT entry (type = 0x%x)\n",
140                        header->type);
141                 break;
142         }
143 }
144
145 static int __init acpi_parse_slit(unsigned long phys_addr, unsigned long size)
146 {
147         struct acpi_table_slit *slit;
148         u32 localities;
149
150         if (!phys_addr || !size)
151                 return -EINVAL;
152
153         slit = (struct acpi_table_slit *)__va(phys_addr);
154
155         /* downcast just for %llu vs %lu for i386/ia64  */
156         localities = (u32) slit->localities;
157
158         acpi_numa_slit_init(slit);
159
160         return 0;
161 }
162
163 static int __init
164 acpi_parse_processor_affinity(acpi_table_entry_header * header,
165                               const unsigned long end)
166 {
167         struct acpi_table_processor_affinity *processor_affinity;
168
169         processor_affinity = (struct acpi_table_processor_affinity *)header;
170         if (!processor_affinity)
171                 return -EINVAL;
172
173         acpi_table_print_srat_entry(header);
174
175         /* let architecture-dependent part to do it */
176         acpi_numa_processor_affinity_init(processor_affinity);
177
178         return 0;
179 }
180
181 static int __init
182 acpi_parse_memory_affinity(acpi_table_entry_header * header,
183                            const unsigned long end)
184 {
185         struct acpi_table_memory_affinity *memory_affinity;
186
187         memory_affinity = (struct acpi_table_memory_affinity *)header;
188         if (!memory_affinity)
189                 return -EINVAL;
190
191         acpi_table_print_srat_entry(header);
192
193         /* let architecture-dependent part to do it */
194         acpi_numa_memory_affinity_init(memory_affinity);
195
196         return 0;
197 }
198
199 static int __init acpi_parse_srat(unsigned long phys_addr, unsigned long size)
200 {
201         struct acpi_table_srat *srat;
202
203         if (!phys_addr || !size)
204                 return -EINVAL;
205
206         srat = (struct acpi_table_srat *)__va(phys_addr);
207
208         return 0;
209 }
210
211 int __init
212 acpi_table_parse_srat(enum acpi_srat_entry_id id,
213                       acpi_madt_entry_handler handler, unsigned int max_entries)
214 {
215         return acpi_table_parse_madt_family(ACPI_SRAT,
216                                             sizeof(struct acpi_table_srat), id,
217                                             handler, max_entries);
218 }
219
220 int __init acpi_numa_init(void)
221 {
222         int result;
223
224         /* SRAT: Static Resource Affinity Table */
225         result = acpi_table_parse(ACPI_SRAT, acpi_parse_srat);
226
227         if (result > 0) {
228                 result = acpi_table_parse_srat(ACPI_SRAT_PROCESSOR_AFFINITY,
229                                                acpi_parse_processor_affinity,
230                                                NR_CPUS);
231                 result = acpi_table_parse_srat(ACPI_SRAT_MEMORY_AFFINITY, acpi_parse_memory_affinity, NR_NODE_MEMBLKS); // IA64 specific
232         }
233
234         /* SLIT: System Locality Information Table */
235         result = acpi_table_parse(ACPI_SLIT, acpi_parse_slit);
236
237         acpi_numa_arch_fixup();
238         return 0;
239 }
240
241 int acpi_get_pxm(acpi_handle h)
242 {
243         unsigned long pxm;
244         acpi_status status;
245         acpi_handle handle;
246         acpi_handle phandle = h;
247
248         do {
249                 handle = phandle;
250                 status = acpi_evaluate_integer(handle, "_PXM", NULL, &pxm);
251                 if (ACPI_SUCCESS(status))
252                         return (int)pxm;
253                 status = acpi_get_parent(handle, &phandle);
254         } while (ACPI_SUCCESS(status));
255         return -1;
256 }
257
258 EXPORT_SYMBOL(acpi_get_pxm);