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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 | ||
e5685b9d | 81 | #if 0 |
762834e8 YG |
82 | void __cpuinit acpi_unmap_pxm_to_node(int node) |
83 | { | |
84 | int pxm = node_to_pxm_map[node]; | |
85 | pxm_to_node_map[pxm] = NID_INVAL; | |
86 | node_to_pxm_map[node] = PXM_INVAL; | |
87 | node_clear(node, nodes_found_map); | |
88 | } | |
e5685b9d | 89 | #endif /* 0 */ |
762834e8 | 90 | |
ae2c6dcf DR |
91 | static void __init |
92 | 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, |
19d0cfe9 | 123 | "SRAT Memory (0x%lx length 0x%lx) in proximity domain %d %s%s\n", |
15a58ed1 AS |
124 | (unsigned long)p->base_address, |
125 | (unsigned long)p->length, | |
19d0cfe9 | 126 | 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 | ||
39b8931b FY |
143 | /* |
144 | * A lot of BIOS fill in 10 (= no distance) everywhere. This messes | |
145 | * up the NUMA heuristics which wants the local node to have a smaller | |
146 | * distance than the others. | |
147 | * Do some quick checks here and only use the SLIT if it passes. | |
148 | */ | |
149 | static __init int slit_valid(struct acpi_table_slit *slit) | |
150 | { | |
151 | int i, j; | |
152 | int d = slit->locality_count; | |
153 | for (i = 0; i < d; i++) { | |
154 | for (j = 0; j < d; j++) { | |
155 | u8 val = slit->entry[d*i + j]; | |
156 | if (i == j) { | |
157 | if (val != LOCAL_DISTANCE) | |
158 | return 0; | |
159 | } else if (val <= LOCAL_DISTANCE) | |
160 | return 0; | |
161 | } | |
162 | } | |
163 | return 1; | |
164 | } | |
165 | ||
15a58ed1 | 166 | static int __init acpi_parse_slit(struct acpi_table_header *table) |
1da177e4 | 167 | { |
4be44fcd | 168 | struct acpi_table_slit *slit; |
1da177e4 | 169 | |
15a58ed1 | 170 | if (!table) |
1da177e4 LT |
171 | return -EINVAL; |
172 | ||
15a58ed1 | 173 | slit = (struct acpi_table_slit *)table; |
1da177e4 | 174 | |
39b8931b FY |
175 | if (!slit_valid(slit)) { |
176 | printk(KERN_INFO "ACPI: SLIT table looks invalid. Not used.\n"); | |
177 | return -EINVAL; | |
178 | } | |
1da177e4 LT |
179 | acpi_numa_slit_init(slit); |
180 | ||
181 | return 0; | |
182 | } | |
183 | ||
1da177e4 | 184 | static int __init |
15a58ed1 | 185 | acpi_parse_processor_affinity(struct acpi_subtable_header * header, |
4be44fcd | 186 | const unsigned long end) |
1da177e4 | 187 | { |
15a58ed1 | 188 | struct acpi_srat_cpu_affinity *processor_affinity; |
1da177e4 | 189 | |
15a58ed1 | 190 | processor_affinity = (struct acpi_srat_cpu_affinity *)header; |
1da177e4 LT |
191 | if (!processor_affinity) |
192 | return -EINVAL; | |
193 | ||
194 | acpi_table_print_srat_entry(header); | |
195 | ||
196 | /* let architecture-dependent part to do it */ | |
197 | acpi_numa_processor_affinity_init(processor_affinity); | |
198 | ||
199 | return 0; | |
200 | } | |
201 | ||
1da177e4 | 202 | static int __init |
15a58ed1 | 203 | acpi_parse_memory_affinity(struct acpi_subtable_header * header, |
4be44fcd | 204 | const unsigned long end) |
1da177e4 | 205 | { |
15a58ed1 | 206 | struct acpi_srat_mem_affinity *memory_affinity; |
1da177e4 | 207 | |
15a58ed1 | 208 | memory_affinity = (struct acpi_srat_mem_affinity *)header; |
1da177e4 LT |
209 | if (!memory_affinity) |
210 | return -EINVAL; | |
211 | ||
212 | acpi_table_print_srat_entry(header); | |
213 | ||
214 | /* let architecture-dependent part to do it */ | |
215 | acpi_numa_memory_affinity_init(memory_affinity); | |
216 | ||
217 | return 0; | |
218 | } | |
219 | ||
15a58ed1 | 220 | static int __init acpi_parse_srat(struct acpi_table_header *table) |
1da177e4 | 221 | { |
4be44fcd | 222 | struct acpi_table_srat *srat; |
1da177e4 | 223 | |
15a58ed1 | 224 | if (!table) |
1da177e4 LT |
225 | return -EINVAL; |
226 | ||
15a58ed1 | 227 | srat = (struct acpi_table_srat *)table; |
1da177e4 LT |
228 | |
229 | return 0; | |
230 | } | |
231 | ||
ae2c6dcf | 232 | static int __init |
15a58ed1 | 233 | acpi_table_parse_srat(enum acpi_srat_type id, |
5a8765a8 | 234 | acpi_table_entry_handler handler, unsigned int max_entries) |
1da177e4 | 235 | { |
6eb87fed | 236 | return acpi_table_parse_entries(ACPI_SIG_SRAT, |
4be44fcd LB |
237 | sizeof(struct acpi_table_srat), id, |
238 | handler, max_entries); | |
1da177e4 LT |
239 | } |
240 | ||
4be44fcd | 241 | int __init acpi_numa_init(void) |
1da177e4 | 242 | { |
1da177e4 | 243 | /* SRAT: Static Resource Affinity Table */ |
7f8f97c3 | 244 | if (!acpi_table_parse(ACPI_SIG_SRAT, acpi_parse_srat)) { |
ae2c6dcf DR |
245 | acpi_table_parse_srat(ACPI_SRAT_TYPE_CPU_AFFINITY, |
246 | acpi_parse_processor_affinity, NR_CPUS); | |
247 | acpi_table_parse_srat(ACPI_SRAT_TYPE_MEMORY_AFFINITY, | |
248 | acpi_parse_memory_affinity, | |
249 | NR_NODE_MEMBLKS); | |
1da177e4 LT |
250 | } |
251 | ||
252 | /* SLIT: System Locality Information Table */ | |
7f8f97c3 | 253 | acpi_table_parse(ACPI_SIG_SLIT, acpi_parse_slit); |
1da177e4 LT |
254 | |
255 | acpi_numa_arch_fixup(); | |
256 | return 0; | |
257 | } | |
258 | ||
7e81ab9d | 259 | int acpi_get_pxm(acpi_handle h) |
1da177e4 | 260 | { |
27663c58 | 261 | unsigned long long pxm; |
1da177e4 LT |
262 | acpi_status status; |
263 | acpi_handle handle; | |
264 | acpi_handle phandle = h; | |
265 | ||
266 | do { | |
267 | handle = phandle; | |
268 | status = acpi_evaluate_integer(handle, "_PXM", NULL, &pxm); | |
269 | if (ACPI_SUCCESS(status)) | |
50dd0969 | 270 | return pxm; |
1da177e4 | 271 | status = acpi_get_parent(handle, &phandle); |
4be44fcd | 272 | } while (ACPI_SUCCESS(status)); |
1da177e4 LT |
273 | return -1; |
274 | } | |
1e3590e2 | 275 | |
7e81ab9d | 276 | int acpi_get_node(acpi_handle *handle) |
1e3590e2 YG |
277 | { |
278 | int pxm, node = -1; | |
279 | ||
1e3590e2 YG |
280 | pxm = acpi_get_pxm(handle); |
281 | if (pxm >= 0) | |
282 | node = acpi_map_pxm_to_node(pxm); | |
283 | ||
635227ee | 284 | return node; |
1e3590e2 YG |
285 | } |
286 | EXPORT_SYMBOL(acpi_get_node); |