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1da177e4 LT |
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> | |
1da177e4 LT |
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 | |
f52fd66d | 36 | ACPI_MODULE_NAME("numa"); |
1da177e4 | 37 | |
762834e8 | 38 | static nodemask_t nodes_found_map = NODE_MASK_NONE; |
762834e8 YG |
39 | |
40 | /* maps to convert between proximity domain and logical node ID */ | |
ffada891 | 41 | static int pxm_to_node_map[MAX_PXM_DOMAINS] |
762834e8 | 42 | = { [0 ... MAX_PXM_DOMAINS - 1] = NID_INVAL }; |
ffada891 | 43 | static int node_to_pxm_map[MAX_NUMNODES] |
762834e8 YG |
44 | = { [0 ... MAX_NUMNODES - 1] = PXM_INVAL }; |
45 | ||
f363d16f | 46 | int pxm_to_node(int pxm) |
762834e8 YG |
47 | { |
48 | if (pxm < 0) | |
49 | return NID_INVAL; | |
50 | return pxm_to_node_map[pxm]; | |
51 | } | |
52 | ||
f363d16f | 53 | int node_to_pxm(int node) |
762834e8 YG |
54 | { |
55 | if (node < 0) | |
56 | return PXM_INVAL; | |
57 | return node_to_pxm_map[node]; | |
58 | } | |
59 | ||
3484d798 DR |
60 | void __acpi_map_pxm_to_node(int pxm, int node) |
61 | { | |
62 | pxm_to_node_map[pxm] = node; | |
63 | node_to_pxm_map[node] = pxm; | |
64 | } | |
65 | ||
8ff6f48d | 66 | int acpi_map_pxm_to_node(int pxm) |
762834e8 YG |
67 | { |
68 | int node = pxm_to_node_map[pxm]; | |
69 | ||
70 | if (node < 0){ | |
71 | if (nodes_weight(nodes_found_map) >= MAX_NUMNODES) | |
72 | return NID_INVAL; | |
73 | node = first_unset_node(nodes_found_map); | |
3484d798 | 74 | __acpi_map_pxm_to_node(pxm, node); |
762834e8 YG |
75 | node_set(node, nodes_found_map); |
76 | } | |
77 | ||
78 | return node; | |
79 | } | |
80 | ||
81 | void __cpuinit acpi_unmap_pxm_to_node(int node) | |
82 | { | |
83 | int pxm = node_to_pxm_map[node]; | |
84 | pxm_to_node_map[pxm] = NID_INVAL; | |
85 | node_to_pxm_map[node] = PXM_INVAL; | |
86 | node_clear(node, nodes_found_map); | |
87 | } | |
88 | ||
ae2c6dcf DR |
89 | static void __init |
90 | acpi_table_print_srat_entry(struct acpi_subtable_header *header) | |
1da177e4 LT |
91 | { |
92 | ||
4be44fcd | 93 | ACPI_FUNCTION_NAME("acpi_table_print_srat_entry"); |
1da177e4 LT |
94 | |
95 | if (!header) | |
96 | return; | |
97 | ||
98 | switch (header->type) { | |
99 | ||
15a58ed1 | 100 | case ACPI_SRAT_TYPE_CPU_AFFINITY: |
1da177e4 | 101 | #ifdef ACPI_DEBUG_OUTPUT |
4be44fcd | 102 | { |
15a58ed1 AS |
103 | struct acpi_srat_cpu_affinity *p = |
104 | (struct acpi_srat_cpu_affinity *)header; | |
4be44fcd LB |
105 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
106 | "SRAT Processor (id[0x%02x] eid[0x%02x]) in proximity domain %d %s\n", | |
15a58ed1 AS |
107 | p->apic_id, p->local_sapic_eid, |
108 | p->proximity_domain_lo, | |
109 | (p->flags & ACPI_SRAT_CPU_ENABLED)? | |
110 | "enabled" : "disabled")); | |
4be44fcd LB |
111 | } |
112 | #endif /* ACPI_DEBUG_OUTPUT */ | |
1da177e4 LT |
113 | break; |
114 | ||
15a58ed1 | 115 | case ACPI_SRAT_TYPE_MEMORY_AFFINITY: |
1da177e4 | 116 | #ifdef ACPI_DEBUG_OUTPUT |
4be44fcd | 117 | { |
15a58ed1 AS |
118 | struct acpi_srat_mem_affinity *p = |
119 | (struct acpi_srat_mem_affinity *)header; | |
4be44fcd | 120 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
15a58ed1 AS |
121 | "SRAT Memory (0x%lx length 0x%lx type 0x%x) in proximity domain %d %s%s\n", |
122 | (unsigned long)p->base_address, | |
123 | (unsigned long)p->length, | |
4be44fcd | 124 | p->memory_type, p->proximity_domain, |
15a58ed1 AS |
125 | (p->flags & ACPI_SRAT_MEM_ENABLED)? |
126 | "enabled" : "disabled", | |
127 | (p->flags & ACPI_SRAT_MEM_HOT_PLUGGABLE)? | |
128 | " hot-pluggable" : "")); | |
4be44fcd LB |
129 | } |
130 | #endif /* ACPI_DEBUG_OUTPUT */ | |
1da177e4 LT |
131 | break; |
132 | ||
133 | default: | |
4be44fcd LB |
134 | printk(KERN_WARNING PREFIX |
135 | "Found unsupported SRAT entry (type = 0x%x)\n", | |
136 | header->type); | |
1da177e4 LT |
137 | break; |
138 | } | |
139 | } | |
140 | ||
15a58ed1 | 141 | static int __init acpi_parse_slit(struct acpi_table_header *table) |
1da177e4 | 142 | { |
4be44fcd LB |
143 | struct acpi_table_slit *slit; |
144 | u32 localities; | |
1da177e4 | 145 | |
15a58ed1 | 146 | if (!table) |
1da177e4 LT |
147 | return -EINVAL; |
148 | ||
15a58ed1 | 149 | slit = (struct acpi_table_slit *)table; |
1da177e4 LT |
150 | |
151 | /* downcast just for %llu vs %lu for i386/ia64 */ | |
15a58ed1 | 152 | localities = (u32) slit->locality_count; |
1da177e4 LT |
153 | |
154 | acpi_numa_slit_init(slit); | |
155 | ||
156 | return 0; | |
157 | } | |
158 | ||
1da177e4 | 159 | static int __init |
15a58ed1 | 160 | acpi_parse_processor_affinity(struct acpi_subtable_header * header, |
4be44fcd | 161 | const unsigned long end) |
1da177e4 | 162 | { |
15a58ed1 | 163 | struct acpi_srat_cpu_affinity *processor_affinity; |
1da177e4 | 164 | |
15a58ed1 | 165 | processor_affinity = (struct acpi_srat_cpu_affinity *)header; |
1da177e4 LT |
166 | if (!processor_affinity) |
167 | return -EINVAL; | |
168 | ||
169 | acpi_table_print_srat_entry(header); | |
170 | ||
171 | /* let architecture-dependent part to do it */ | |
172 | acpi_numa_processor_affinity_init(processor_affinity); | |
173 | ||
174 | return 0; | |
175 | } | |
176 | ||
1da177e4 | 177 | static int __init |
15a58ed1 | 178 | acpi_parse_memory_affinity(struct acpi_subtable_header * header, |
4be44fcd | 179 | const unsigned long end) |
1da177e4 | 180 | { |
15a58ed1 | 181 | struct acpi_srat_mem_affinity *memory_affinity; |
1da177e4 | 182 | |
15a58ed1 | 183 | memory_affinity = (struct acpi_srat_mem_affinity *)header; |
1da177e4 LT |
184 | if (!memory_affinity) |
185 | return -EINVAL; | |
186 | ||
187 | acpi_table_print_srat_entry(header); | |
188 | ||
189 | /* let architecture-dependent part to do it */ | |
190 | acpi_numa_memory_affinity_init(memory_affinity); | |
191 | ||
192 | return 0; | |
193 | } | |
194 | ||
15a58ed1 | 195 | static int __init acpi_parse_srat(struct acpi_table_header *table) |
1da177e4 | 196 | { |
4be44fcd | 197 | struct acpi_table_srat *srat; |
1da177e4 | 198 | |
15a58ed1 | 199 | if (!table) |
1da177e4 LT |
200 | return -EINVAL; |
201 | ||
15a58ed1 | 202 | srat = (struct acpi_table_srat *)table; |
1da177e4 LT |
203 | |
204 | return 0; | |
205 | } | |
206 | ||
ae2c6dcf | 207 | static int __init |
15a58ed1 | 208 | acpi_table_parse_srat(enum acpi_srat_type id, |
5a8765a8 | 209 | acpi_table_entry_handler handler, unsigned int max_entries) |
1da177e4 | 210 | { |
6eb87fed | 211 | return acpi_table_parse_entries(ACPI_SIG_SRAT, |
4be44fcd LB |
212 | sizeof(struct acpi_table_srat), id, |
213 | handler, max_entries); | |
1da177e4 LT |
214 | } |
215 | ||
4be44fcd | 216 | int __init acpi_numa_init(void) |
1da177e4 | 217 | { |
1da177e4 | 218 | /* SRAT: Static Resource Affinity Table */ |
7f8f97c3 | 219 | if (!acpi_table_parse(ACPI_SIG_SRAT, acpi_parse_srat)) { |
ae2c6dcf DR |
220 | acpi_table_parse_srat(ACPI_SRAT_TYPE_CPU_AFFINITY, |
221 | acpi_parse_processor_affinity, NR_CPUS); | |
222 | acpi_table_parse_srat(ACPI_SRAT_TYPE_MEMORY_AFFINITY, | |
223 | acpi_parse_memory_affinity, | |
224 | NR_NODE_MEMBLKS); | |
1da177e4 LT |
225 | } |
226 | ||
227 | /* SLIT: System Locality Information Table */ | |
7f8f97c3 | 228 | acpi_table_parse(ACPI_SIG_SLIT, acpi_parse_slit); |
1da177e4 LT |
229 | |
230 | acpi_numa_arch_fixup(); | |
231 | return 0; | |
232 | } | |
233 | ||
7e81ab9d | 234 | int acpi_get_pxm(acpi_handle h) |
1da177e4 LT |
235 | { |
236 | unsigned long pxm; | |
237 | acpi_status status; | |
238 | acpi_handle handle; | |
239 | acpi_handle phandle = h; | |
240 | ||
241 | do { | |
242 | handle = phandle; | |
243 | status = acpi_evaluate_integer(handle, "_PXM", NULL, &pxm); | |
244 | if (ACPI_SUCCESS(status)) | |
50dd0969 | 245 | return pxm; |
1da177e4 | 246 | status = acpi_get_parent(handle, &phandle); |
4be44fcd | 247 | } while (ACPI_SUCCESS(status)); |
1da177e4 LT |
248 | return -1; |
249 | } | |
250 | EXPORT_SYMBOL(acpi_get_pxm); | |
1e3590e2 | 251 | |
7e81ab9d | 252 | int acpi_get_node(acpi_handle *handle) |
1e3590e2 YG |
253 | { |
254 | int pxm, node = -1; | |
255 | ||
1e3590e2 YG |
256 | pxm = acpi_get_pxm(handle); |
257 | if (pxm >= 0) | |
258 | node = acpi_map_pxm_to_node(pxm); | |
259 | ||
635227ee | 260 | return node; |
1e3590e2 YG |
261 | } |
262 | EXPORT_SYMBOL(acpi_get_node); |