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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 | |
4be44fcd | 36 | ACPI_MODULE_NAME("numa") |
1da177e4 | 37 | |
762834e8 YG |
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 | ||
15a58ed1 | 48 | extern int __init acpi_table_parse_madt_family(char *id, |
4be44fcd LB |
49 | unsigned long madt_size, |
50 | int entry_id, | |
51 | acpi_madt_entry_handler handler, | |
52 | unsigned int max_entries); | |
1da177e4 | 53 | |
762834e8 YG |
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 | ||
15a58ed1 | 92 | void __init acpi_table_print_srat_entry(struct acpi_subtable_header * header) |
1da177e4 LT |
93 | { |
94 | ||
4be44fcd | 95 | ACPI_FUNCTION_NAME("acpi_table_print_srat_entry"); |
1da177e4 LT |
96 | |
97 | if (!header) | |
98 | return; | |
99 | ||
100 | switch (header->type) { | |
101 | ||
15a58ed1 | 102 | case ACPI_SRAT_TYPE_CPU_AFFINITY: |
1da177e4 | 103 | #ifdef ACPI_DEBUG_OUTPUT |
4be44fcd | 104 | { |
15a58ed1 AS |
105 | struct acpi_srat_cpu_affinity *p = |
106 | (struct acpi_srat_cpu_affinity *)header; | |
4be44fcd LB |
107 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
108 | "SRAT Processor (id[0x%02x] eid[0x%02x]) in proximity domain %d %s\n", | |
15a58ed1 AS |
109 | p->apic_id, p->local_sapic_eid, |
110 | p->proximity_domain_lo, | |
111 | (p->flags & ACPI_SRAT_CPU_ENABLED)? | |
112 | "enabled" : "disabled")); | |
4be44fcd LB |
113 | } |
114 | #endif /* ACPI_DEBUG_OUTPUT */ | |
1da177e4 LT |
115 | break; |
116 | ||
15a58ed1 | 117 | case ACPI_SRAT_TYPE_MEMORY_AFFINITY: |
1da177e4 | 118 | #ifdef ACPI_DEBUG_OUTPUT |
4be44fcd | 119 | { |
15a58ed1 AS |
120 | struct acpi_srat_mem_affinity *p = |
121 | (struct acpi_srat_mem_affinity *)header; | |
4be44fcd | 122 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
15a58ed1 AS |
123 | "SRAT Memory (0x%lx length 0x%lx type 0x%x) in proximity domain %d %s%s\n", |
124 | (unsigned long)p->base_address, | |
125 | (unsigned long)p->length, | |
4be44fcd | 126 | p->memory_type, p->proximity_domain, |
15a58ed1 AS |
127 | (p->flags & ACPI_SRAT_MEM_ENABLED)? |
128 | "enabled" : "disabled", | |
129 | (p->flags & ACPI_SRAT_MEM_HOT_PLUGGABLE)? | |
130 | " hot-pluggable" : "")); | |
4be44fcd LB |
131 | } |
132 | #endif /* ACPI_DEBUG_OUTPUT */ | |
1da177e4 LT |
133 | break; |
134 | ||
135 | default: | |
4be44fcd LB |
136 | printk(KERN_WARNING PREFIX |
137 | "Found unsupported SRAT entry (type = 0x%x)\n", | |
138 | header->type); | |
1da177e4 LT |
139 | break; |
140 | } | |
141 | } | |
142 | ||
15a58ed1 | 143 | static int __init acpi_parse_slit(struct acpi_table_header *table) |
1da177e4 | 144 | { |
4be44fcd LB |
145 | struct acpi_table_slit *slit; |
146 | u32 localities; | |
1da177e4 | 147 | |
15a58ed1 | 148 | if (!table) |
1da177e4 LT |
149 | return -EINVAL; |
150 | ||
15a58ed1 | 151 | slit = (struct acpi_table_slit *)table; |
1da177e4 LT |
152 | |
153 | /* downcast just for %llu vs %lu for i386/ia64 */ | |
15a58ed1 | 154 | localities = (u32) slit->locality_count; |
1da177e4 LT |
155 | |
156 | acpi_numa_slit_init(slit); | |
157 | ||
158 | return 0; | |
159 | } | |
160 | ||
1da177e4 | 161 | static int __init |
15a58ed1 | 162 | acpi_parse_processor_affinity(struct acpi_subtable_header * header, |
4be44fcd | 163 | const unsigned long end) |
1da177e4 | 164 | { |
15a58ed1 | 165 | struct acpi_srat_cpu_affinity *processor_affinity; |
1da177e4 | 166 | |
15a58ed1 | 167 | processor_affinity = (struct acpi_srat_cpu_affinity *)header; |
1da177e4 LT |
168 | if (!processor_affinity) |
169 | return -EINVAL; | |
170 | ||
171 | acpi_table_print_srat_entry(header); | |
172 | ||
173 | /* let architecture-dependent part to do it */ | |
174 | acpi_numa_processor_affinity_init(processor_affinity); | |
175 | ||
176 | return 0; | |
177 | } | |
178 | ||
1da177e4 | 179 | static int __init |
15a58ed1 | 180 | acpi_parse_memory_affinity(struct acpi_subtable_header * header, |
4be44fcd | 181 | const unsigned long end) |
1da177e4 | 182 | { |
15a58ed1 | 183 | struct acpi_srat_mem_affinity *memory_affinity; |
1da177e4 | 184 | |
15a58ed1 | 185 | memory_affinity = (struct acpi_srat_mem_affinity *)header; |
1da177e4 LT |
186 | if (!memory_affinity) |
187 | return -EINVAL; | |
188 | ||
189 | acpi_table_print_srat_entry(header); | |
190 | ||
191 | /* let architecture-dependent part to do it */ | |
192 | acpi_numa_memory_affinity_init(memory_affinity); | |
193 | ||
194 | return 0; | |
195 | } | |
196 | ||
15a58ed1 | 197 | static int __init acpi_parse_srat(struct acpi_table_header *table) |
1da177e4 | 198 | { |
4be44fcd | 199 | struct acpi_table_srat *srat; |
1da177e4 | 200 | |
15a58ed1 | 201 | if (!table) |
1da177e4 LT |
202 | return -EINVAL; |
203 | ||
15a58ed1 | 204 | srat = (struct acpi_table_srat *)table; |
1da177e4 LT |
205 | |
206 | return 0; | |
207 | } | |
208 | ||
1da177e4 | 209 | int __init |
15a58ed1 | 210 | acpi_table_parse_srat(enum acpi_srat_type id, |
4be44fcd | 211 | acpi_madt_entry_handler handler, unsigned int max_entries) |
1da177e4 | 212 | { |
15a58ed1 | 213 | return acpi_table_parse_madt_family(ACPI_SIG_SRAT, |
4be44fcd LB |
214 | sizeof(struct acpi_table_srat), id, |
215 | handler, max_entries); | |
1da177e4 LT |
216 | } |
217 | ||
4be44fcd | 218 | int __init acpi_numa_init(void) |
1da177e4 | 219 | { |
4be44fcd | 220 | int result; |
1da177e4 LT |
221 | |
222 | /* SRAT: Static Resource Affinity Table */ | |
15a58ed1 | 223 | result = acpi_table_parse(ACPI_SIG_SRAT, acpi_parse_srat); |
1da177e4 LT |
224 | |
225 | if (result > 0) { | |
15a58ed1 | 226 | result = acpi_table_parse_srat(ACPI_SRAT_TYPE_CPU_AFFINITY, |
1da177e4 LT |
227 | acpi_parse_processor_affinity, |
228 | NR_CPUS); | |
15a58ed1 | 229 | result = acpi_table_parse_srat(ACPI_SRAT_TYPE_MEMORY_AFFINITY, acpi_parse_memory_affinity, NR_NODE_MEMBLKS); // IA64 specific |
1da177e4 LT |
230 | } |
231 | ||
232 | /* SLIT: System Locality Information Table */ | |
15a58ed1 | 233 | result = acpi_table_parse(ACPI_SIG_SLIT, acpi_parse_slit); |
1da177e4 LT |
234 | |
235 | acpi_numa_arch_fixup(); | |
236 | return 0; | |
237 | } | |
238 | ||
4be44fcd | 239 | int acpi_get_pxm(acpi_handle h) |
1da177e4 LT |
240 | { |
241 | unsigned long pxm; | |
242 | acpi_status status; | |
243 | acpi_handle handle; | |
244 | acpi_handle phandle = h; | |
245 | ||
246 | do { | |
247 | handle = phandle; | |
248 | status = acpi_evaluate_integer(handle, "_PXM", NULL, &pxm); | |
249 | if (ACPI_SUCCESS(status)) | |
50dd0969 | 250 | return pxm; |
1da177e4 | 251 | status = acpi_get_parent(handle, &phandle); |
4be44fcd | 252 | } while (ACPI_SUCCESS(status)); |
1da177e4 LT |
253 | return -1; |
254 | } | |
255 | EXPORT_SYMBOL(acpi_get_pxm); | |
1e3590e2 YG |
256 | |
257 | int acpi_get_node(acpi_handle *handle) | |
258 | { | |
259 | int pxm, node = -1; | |
260 | ||
1e3590e2 YG |
261 | pxm = acpi_get_pxm(handle); |
262 | if (pxm >= 0) | |
263 | node = acpi_map_pxm_to_node(pxm); | |
264 | ||
635227ee | 265 | return node; |
1e3590e2 YG |
266 | } |
267 | EXPORT_SYMBOL(acpi_get_node); |