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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> | |
b552a8c5 | 31 | #include <linux/numa.h> |
1da177e4 | 32 | #include <acpi/acpi_bus.h> |
1da177e4 | 33 | |
a192a958 LB |
34 | #define PREFIX "ACPI: " |
35 | ||
1da177e4 LT |
36 | #define ACPI_NUMA 0x80000000 |
37 | #define _COMPONENT ACPI_NUMA | |
f52fd66d | 38 | ACPI_MODULE_NAME("numa"); |
1da177e4 | 39 | |
762834e8 | 40 | static nodemask_t nodes_found_map = NODE_MASK_NONE; |
762834e8 YG |
41 | |
42 | /* maps to convert between proximity domain and logical node ID */ | |
ffada891 | 43 | static int pxm_to_node_map[MAX_PXM_DOMAINS] |
b552a8c5 | 44 | = { [0 ... MAX_PXM_DOMAINS - 1] = NUMA_NO_NODE }; |
ffada891 | 45 | static int node_to_pxm_map[MAX_NUMNODES] |
b552a8c5 | 46 | = { [0 ... MAX_NUMNODES - 1] = PXM_INVAL }; |
762834e8 | 47 | |
f363d16f | 48 | int pxm_to_node(int pxm) |
762834e8 YG |
49 | { |
50 | if (pxm < 0) | |
b552a8c5 | 51 | return NUMA_NO_NODE; |
762834e8 YG |
52 | return pxm_to_node_map[pxm]; |
53 | } | |
54 | ||
f363d16f | 55 | int node_to_pxm(int node) |
762834e8 YG |
56 | { |
57 | if (node < 0) | |
58 | return PXM_INVAL; | |
59 | return node_to_pxm_map[node]; | |
60 | } | |
61 | ||
3484d798 DR |
62 | void __acpi_map_pxm_to_node(int pxm, int node) |
63 | { | |
64 | pxm_to_node_map[pxm] = node; | |
65 | node_to_pxm_map[node] = pxm; | |
66 | } | |
67 | ||
8ff6f48d | 68 | int acpi_map_pxm_to_node(int pxm) |
762834e8 YG |
69 | { |
70 | int node = pxm_to_node_map[pxm]; | |
71 | ||
b552a8c5 | 72 | if (node < 0) { |
762834e8 | 73 | if (nodes_weight(nodes_found_map) >= MAX_NUMNODES) |
b552a8c5 | 74 | return NUMA_NO_NODE; |
762834e8 | 75 | node = first_unset_node(nodes_found_map); |
3484d798 | 76 | __acpi_map_pxm_to_node(pxm, node); |
762834e8 YG |
77 | node_set(node, nodes_found_map); |
78 | } | |
79 | ||
80 | return node; | |
81 | } | |
82 | ||
ae2c6dcf DR |
83 | static void __init |
84 | acpi_table_print_srat_entry(struct acpi_subtable_header *header) | |
1da177e4 LT |
85 | { |
86 | ||
4be44fcd | 87 | ACPI_FUNCTION_NAME("acpi_table_print_srat_entry"); |
1da177e4 LT |
88 | |
89 | if (!header) | |
90 | return; | |
91 | ||
92 | switch (header->type) { | |
93 | ||
15a58ed1 | 94 | case ACPI_SRAT_TYPE_CPU_AFFINITY: |
1da177e4 | 95 | #ifdef ACPI_DEBUG_OUTPUT |
4be44fcd | 96 | { |
15a58ed1 AS |
97 | struct acpi_srat_cpu_affinity *p = |
98 | (struct acpi_srat_cpu_affinity *)header; | |
4be44fcd LB |
99 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
100 | "SRAT Processor (id[0x%02x] eid[0x%02x]) in proximity domain %d %s\n", | |
15a58ed1 AS |
101 | p->apic_id, p->local_sapic_eid, |
102 | p->proximity_domain_lo, | |
103 | (p->flags & ACPI_SRAT_CPU_ENABLED)? | |
104 | "enabled" : "disabled")); | |
4be44fcd LB |
105 | } |
106 | #endif /* ACPI_DEBUG_OUTPUT */ | |
1da177e4 LT |
107 | break; |
108 | ||
15a58ed1 | 109 | case ACPI_SRAT_TYPE_MEMORY_AFFINITY: |
1da177e4 | 110 | #ifdef ACPI_DEBUG_OUTPUT |
4be44fcd | 111 | { |
15a58ed1 AS |
112 | struct acpi_srat_mem_affinity *p = |
113 | (struct acpi_srat_mem_affinity *)header; | |
4be44fcd | 114 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
19d0cfe9 | 115 | "SRAT Memory (0x%lx length 0x%lx) in proximity domain %d %s%s\n", |
15a58ed1 AS |
116 | (unsigned long)p->base_address, |
117 | (unsigned long)p->length, | |
19d0cfe9 | 118 | p->proximity_domain, |
15a58ed1 AS |
119 | (p->flags & ACPI_SRAT_MEM_ENABLED)? |
120 | "enabled" : "disabled", | |
121 | (p->flags & ACPI_SRAT_MEM_HOT_PLUGGABLE)? | |
122 | " hot-pluggable" : "")); | |
4be44fcd LB |
123 | } |
124 | #endif /* ACPI_DEBUG_OUTPUT */ | |
1da177e4 LT |
125 | break; |
126 | ||
7237d3de SS |
127 | case ACPI_SRAT_TYPE_X2APIC_CPU_AFFINITY: |
128 | #ifdef ACPI_DEBUG_OUTPUT | |
129 | { | |
130 | struct acpi_srat_x2apic_cpu_affinity *p = | |
131 | (struct acpi_srat_x2apic_cpu_affinity *)header; | |
132 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
133 | "SRAT Processor (x2apicid[0x%08x]) in" | |
134 | " proximity domain %d %s\n", | |
135 | p->apic_id, | |
136 | p->proximity_domain, | |
137 | (p->flags & ACPI_SRAT_CPU_ENABLED) ? | |
138 | "enabled" : "disabled")); | |
139 | } | |
140 | #endif /* ACPI_DEBUG_OUTPUT */ | |
141 | break; | |
1da177e4 | 142 | default: |
4be44fcd LB |
143 | printk(KERN_WARNING PREFIX |
144 | "Found unsupported SRAT entry (type = 0x%x)\n", | |
145 | header->type); | |
1da177e4 LT |
146 | break; |
147 | } | |
148 | } | |
149 | ||
39b8931b FY |
150 | /* |
151 | * A lot of BIOS fill in 10 (= no distance) everywhere. This messes | |
152 | * up the NUMA heuristics which wants the local node to have a smaller | |
153 | * distance than the others. | |
154 | * Do some quick checks here and only use the SLIT if it passes. | |
155 | */ | |
156 | static __init int slit_valid(struct acpi_table_slit *slit) | |
157 | { | |
158 | int i, j; | |
159 | int d = slit->locality_count; | |
160 | for (i = 0; i < d; i++) { | |
161 | for (j = 0; j < d; j++) { | |
162 | u8 val = slit->entry[d*i + j]; | |
163 | if (i == j) { | |
164 | if (val != LOCAL_DISTANCE) | |
165 | return 0; | |
166 | } else if (val <= LOCAL_DISTANCE) | |
167 | return 0; | |
168 | } | |
169 | } | |
170 | return 1; | |
171 | } | |
172 | ||
15a58ed1 | 173 | static int __init acpi_parse_slit(struct acpi_table_header *table) |
1da177e4 | 174 | { |
4be44fcd | 175 | struct acpi_table_slit *slit; |
1da177e4 | 176 | |
15a58ed1 | 177 | if (!table) |
1da177e4 LT |
178 | return -EINVAL; |
179 | ||
15a58ed1 | 180 | slit = (struct acpi_table_slit *)table; |
1da177e4 | 181 | |
39b8931b FY |
182 | if (!slit_valid(slit)) { |
183 | printk(KERN_INFO "ACPI: SLIT table looks invalid. Not used.\n"); | |
184 | return -EINVAL; | |
185 | } | |
1da177e4 LT |
186 | acpi_numa_slit_init(slit); |
187 | ||
188 | return 0; | |
189 | } | |
190 | ||
7237d3de SS |
191 | void __init __attribute__ ((weak)) |
192 | acpi_numa_x2apic_affinity_init(struct acpi_srat_x2apic_cpu_affinity *pa) | |
193 | { | |
194 | printk(KERN_WARNING PREFIX | |
195 | "Found unsupported x2apic [0x%08x] SRAT entry\n", pa->apic_id); | |
196 | return; | |
197 | } | |
198 | ||
199 | ||
200 | static int __init | |
201 | acpi_parse_x2apic_affinity(struct acpi_subtable_header *header, | |
202 | const unsigned long end) | |
203 | { | |
204 | struct acpi_srat_x2apic_cpu_affinity *processor_affinity; | |
205 | ||
206 | processor_affinity = (struct acpi_srat_x2apic_cpu_affinity *)header; | |
207 | if (!processor_affinity) | |
208 | return -EINVAL; | |
209 | ||
210 | acpi_table_print_srat_entry(header); | |
211 | ||
212 | /* let architecture-dependent part to do it */ | |
213 | acpi_numa_x2apic_affinity_init(processor_affinity); | |
214 | ||
215 | return 0; | |
216 | } | |
217 | ||
1da177e4 | 218 | static int __init |
7237d3de | 219 | acpi_parse_processor_affinity(struct acpi_subtable_header *header, |
4be44fcd | 220 | const unsigned long end) |
1da177e4 | 221 | { |
15a58ed1 | 222 | struct acpi_srat_cpu_affinity *processor_affinity; |
1da177e4 | 223 | |
15a58ed1 | 224 | processor_affinity = (struct acpi_srat_cpu_affinity *)header; |
1da177e4 LT |
225 | if (!processor_affinity) |
226 | return -EINVAL; | |
227 | ||
228 | acpi_table_print_srat_entry(header); | |
229 | ||
230 | /* let architecture-dependent part to do it */ | |
231 | acpi_numa_processor_affinity_init(processor_affinity); | |
232 | ||
233 | return 0; | |
234 | } | |
235 | ||
1da177e4 | 236 | static int __init |
15a58ed1 | 237 | acpi_parse_memory_affinity(struct acpi_subtable_header * header, |
4be44fcd | 238 | const unsigned long end) |
1da177e4 | 239 | { |
15a58ed1 | 240 | struct acpi_srat_mem_affinity *memory_affinity; |
1da177e4 | 241 | |
15a58ed1 | 242 | memory_affinity = (struct acpi_srat_mem_affinity *)header; |
1da177e4 LT |
243 | if (!memory_affinity) |
244 | return -EINVAL; | |
245 | ||
246 | acpi_table_print_srat_entry(header); | |
247 | ||
248 | /* let architecture-dependent part to do it */ | |
249 | acpi_numa_memory_affinity_init(memory_affinity); | |
250 | ||
251 | return 0; | |
252 | } | |
253 | ||
15a58ed1 | 254 | static int __init acpi_parse_srat(struct acpi_table_header *table) |
1da177e4 | 255 | { |
4be44fcd | 256 | struct acpi_table_srat *srat; |
1da177e4 | 257 | |
15a58ed1 | 258 | if (!table) |
1da177e4 LT |
259 | return -EINVAL; |
260 | ||
15a58ed1 | 261 | srat = (struct acpi_table_srat *)table; |
1da177e4 LT |
262 | |
263 | return 0; | |
264 | } | |
265 | ||
ae2c6dcf | 266 | static int __init |
15a58ed1 | 267 | acpi_table_parse_srat(enum acpi_srat_type id, |
5a8765a8 | 268 | acpi_table_entry_handler handler, unsigned int max_entries) |
1da177e4 | 269 | { |
6eb87fed | 270 | return acpi_table_parse_entries(ACPI_SIG_SRAT, |
4be44fcd LB |
271 | sizeof(struct acpi_table_srat), id, |
272 | handler, max_entries); | |
1da177e4 LT |
273 | } |
274 | ||
4be44fcd | 275 | int __init acpi_numa_init(void) |
1da177e4 | 276 | { |
8716273c DR |
277 | int ret = 0; |
278 | ||
1da177e4 | 279 | /* SRAT: Static Resource Affinity Table */ |
7f8f97c3 | 280 | if (!acpi_table_parse(ACPI_SIG_SRAT, acpi_parse_srat)) { |
7237d3de SS |
281 | acpi_table_parse_srat(ACPI_SRAT_TYPE_X2APIC_CPU_AFFINITY, |
282 | acpi_parse_x2apic_affinity, NR_CPUS); | |
ae2c6dcf DR |
283 | acpi_table_parse_srat(ACPI_SRAT_TYPE_CPU_AFFINITY, |
284 | acpi_parse_processor_affinity, NR_CPUS); | |
8716273c DR |
285 | ret = acpi_table_parse_srat(ACPI_SRAT_TYPE_MEMORY_AFFINITY, |
286 | acpi_parse_memory_affinity, | |
287 | NR_NODE_MEMBLKS); | |
1da177e4 LT |
288 | } |
289 | ||
290 | /* SLIT: System Locality Information Table */ | |
7f8f97c3 | 291 | acpi_table_parse(ACPI_SIG_SLIT, acpi_parse_slit); |
1da177e4 LT |
292 | |
293 | acpi_numa_arch_fixup(); | |
8716273c | 294 | return ret; |
1da177e4 LT |
295 | } |
296 | ||
7e81ab9d | 297 | int acpi_get_pxm(acpi_handle h) |
1da177e4 | 298 | { |
27663c58 | 299 | unsigned long long pxm; |
1da177e4 LT |
300 | acpi_status status; |
301 | acpi_handle handle; | |
302 | acpi_handle phandle = h; | |
303 | ||
304 | do { | |
305 | handle = phandle; | |
306 | status = acpi_evaluate_integer(handle, "_PXM", NULL, &pxm); | |
307 | if (ACPI_SUCCESS(status)) | |
50dd0969 | 308 | return pxm; |
1da177e4 | 309 | status = acpi_get_parent(handle, &phandle); |
4be44fcd | 310 | } while (ACPI_SUCCESS(status)); |
1da177e4 LT |
311 | return -1; |
312 | } | |
1e3590e2 | 313 | |
7e81ab9d | 314 | int acpi_get_node(acpi_handle *handle) |
1e3590e2 YG |
315 | { |
316 | int pxm, node = -1; | |
317 | ||
1e3590e2 | 318 | pxm = acpi_get_pxm(handle); |
27ce3419 | 319 | if (pxm >= 0 && pxm < MAX_PXM_DOMAINS) |
1e3590e2 YG |
320 | node = acpi_map_pxm_to_node(pxm); |
321 | ||
635227ee | 322 | return node; |
1e3590e2 YG |
323 | } |
324 | EXPORT_SYMBOL(acpi_get_node); |