Commit | Line | Data |
---|---|---|
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> | |
1da177e4 LT |
32 | |
33 | #define ACPI_NUMA 0x80000000 | |
34 | #define _COMPONENT ACPI_NUMA | |
f52fd66d | 35 | ACPI_MODULE_NAME("numa"); |
1da177e4 | 36 | |
762834e8 | 37 | static nodemask_t nodes_found_map = NODE_MASK_NONE; |
762834e8 YG |
38 | |
39 | /* maps to convert between proximity domain and logical node ID */ | |
ffada891 | 40 | static int pxm_to_node_map[MAX_PXM_DOMAINS] |
762834e8 | 41 | = { [0 ... MAX_PXM_DOMAINS - 1] = NID_INVAL }; |
ffada891 | 42 | static int node_to_pxm_map[MAX_NUMNODES] |
762834e8 YG |
43 | = { [0 ... MAX_NUMNODES - 1] = PXM_INVAL }; |
44 | ||
f363d16f | 45 | int pxm_to_node(int pxm) |
762834e8 YG |
46 | { |
47 | if (pxm < 0) | |
48 | return NID_INVAL; | |
49 | return pxm_to_node_map[pxm]; | |
50 | } | |
51 | ||
f363d16f | 52 | int node_to_pxm(int node) |
762834e8 YG |
53 | { |
54 | if (node < 0) | |
55 | return PXM_INVAL; | |
56 | return node_to_pxm_map[node]; | |
57 | } | |
58 | ||
3484d798 DR |
59 | void __acpi_map_pxm_to_node(int pxm, int node) |
60 | { | |
61 | pxm_to_node_map[pxm] = node; | |
62 | node_to_pxm_map[node] = pxm; | |
63 | } | |
64 | ||
8ff6f48d | 65 | int acpi_map_pxm_to_node(int pxm) |
762834e8 YG |
66 | { |
67 | int node = pxm_to_node_map[pxm]; | |
68 | ||
69 | if (node < 0){ | |
70 | if (nodes_weight(nodes_found_map) >= MAX_NUMNODES) | |
71 | return NID_INVAL; | |
72 | node = first_unset_node(nodes_found_map); | |
3484d798 | 73 | __acpi_map_pxm_to_node(pxm, node); |
762834e8 YG |
74 | node_set(node, nodes_found_map); |
75 | } | |
76 | ||
77 | return node; | |
78 | } | |
79 | ||
e5685b9d | 80 | #if 0 |
762834e8 YG |
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 | } | |
e5685b9d | 88 | #endif /* 0 */ |
762834e8 | 89 | |
ae2c6dcf DR |
90 | static void __init |
91 | acpi_table_print_srat_entry(struct acpi_subtable_header *header) | |
1da177e4 LT |
92 | { |
93 | ||
4be44fcd | 94 | ACPI_FUNCTION_NAME("acpi_table_print_srat_entry"); |
1da177e4 LT |
95 | |
96 | if (!header) | |
97 | return; | |
98 | ||
99 | switch (header->type) { | |
100 | ||
15a58ed1 | 101 | case ACPI_SRAT_TYPE_CPU_AFFINITY: |
1da177e4 | 102 | #ifdef ACPI_DEBUG_OUTPUT |
4be44fcd | 103 | { |
15a58ed1 AS |
104 | struct acpi_srat_cpu_affinity *p = |
105 | (struct acpi_srat_cpu_affinity *)header; | |
4be44fcd LB |
106 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
107 | "SRAT Processor (id[0x%02x] eid[0x%02x]) in proximity domain %d %s\n", | |
15a58ed1 AS |
108 | p->apic_id, p->local_sapic_eid, |
109 | p->proximity_domain_lo, | |
110 | (p->flags & ACPI_SRAT_CPU_ENABLED)? | |
111 | "enabled" : "disabled")); | |
4be44fcd LB |
112 | } |
113 | #endif /* ACPI_DEBUG_OUTPUT */ | |
1da177e4 LT |
114 | break; |
115 | ||
15a58ed1 | 116 | case ACPI_SRAT_TYPE_MEMORY_AFFINITY: |
1da177e4 | 117 | #ifdef ACPI_DEBUG_OUTPUT |
4be44fcd | 118 | { |
15a58ed1 AS |
119 | struct acpi_srat_mem_affinity *p = |
120 | (struct acpi_srat_mem_affinity *)header; | |
4be44fcd | 121 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
19d0cfe9 | 122 | "SRAT Memory (0x%lx length 0x%lx) in proximity domain %d %s%s\n", |
15a58ed1 AS |
123 | (unsigned long)p->base_address, |
124 | (unsigned long)p->length, | |
19d0cfe9 | 125 | p->proximity_domain, |
15a58ed1 AS |
126 | (p->flags & ACPI_SRAT_MEM_ENABLED)? |
127 | "enabled" : "disabled", | |
128 | (p->flags & ACPI_SRAT_MEM_HOT_PLUGGABLE)? | |
129 | " hot-pluggable" : "")); | |
4be44fcd LB |
130 | } |
131 | #endif /* ACPI_DEBUG_OUTPUT */ | |
1da177e4 LT |
132 | break; |
133 | ||
134 | default: | |
4be44fcd LB |
135 | printk(KERN_WARNING PREFIX |
136 | "Found unsupported SRAT entry (type = 0x%x)\n", | |
137 | header->type); | |
1da177e4 LT |
138 | break; |
139 | } | |
140 | } | |
141 | ||
39b8931b FY |
142 | /* |
143 | * A lot of BIOS fill in 10 (= no distance) everywhere. This messes | |
144 | * up the NUMA heuristics which wants the local node to have a smaller | |
145 | * distance than the others. | |
146 | * Do some quick checks here and only use the SLIT if it passes. | |
147 | */ | |
148 | static __init int slit_valid(struct acpi_table_slit *slit) | |
149 | { | |
150 | int i, j; | |
151 | int d = slit->locality_count; | |
152 | for (i = 0; i < d; i++) { | |
153 | for (j = 0; j < d; j++) { | |
154 | u8 val = slit->entry[d*i + j]; | |
155 | if (i == j) { | |
156 | if (val != LOCAL_DISTANCE) | |
157 | return 0; | |
158 | } else if (val <= LOCAL_DISTANCE) | |
159 | return 0; | |
160 | } | |
161 | } | |
162 | return 1; | |
163 | } | |
164 | ||
15a58ed1 | 165 | static int __init acpi_parse_slit(struct acpi_table_header *table) |
1da177e4 | 166 | { |
4be44fcd | 167 | struct acpi_table_slit *slit; |
1da177e4 | 168 | |
15a58ed1 | 169 | if (!table) |
1da177e4 LT |
170 | return -EINVAL; |
171 | ||
15a58ed1 | 172 | slit = (struct acpi_table_slit *)table; |
1da177e4 | 173 | |
39b8931b FY |
174 | if (!slit_valid(slit)) { |
175 | printk(KERN_INFO "ACPI: SLIT table looks invalid. Not used.\n"); | |
176 | return -EINVAL; | |
177 | } | |
1da177e4 LT |
178 | acpi_numa_slit_init(slit); |
179 | ||
180 | return 0; | |
181 | } | |
182 | ||
1da177e4 | 183 | static int __init |
15a58ed1 | 184 | acpi_parse_processor_affinity(struct acpi_subtable_header * header, |
4be44fcd | 185 | const unsigned long end) |
1da177e4 | 186 | { |
15a58ed1 | 187 | struct acpi_srat_cpu_affinity *processor_affinity; |
1da177e4 | 188 | |
15a58ed1 | 189 | processor_affinity = (struct acpi_srat_cpu_affinity *)header; |
1da177e4 LT |
190 | if (!processor_affinity) |
191 | return -EINVAL; | |
192 | ||
193 | acpi_table_print_srat_entry(header); | |
194 | ||
195 | /* let architecture-dependent part to do it */ | |
196 | acpi_numa_processor_affinity_init(processor_affinity); | |
197 | ||
198 | return 0; | |
199 | } | |
200 | ||
1da177e4 | 201 | static int __init |
15a58ed1 | 202 | acpi_parse_memory_affinity(struct acpi_subtable_header * header, |
4be44fcd | 203 | const unsigned long end) |
1da177e4 | 204 | { |
15a58ed1 | 205 | struct acpi_srat_mem_affinity *memory_affinity; |
1da177e4 | 206 | |
15a58ed1 | 207 | memory_affinity = (struct acpi_srat_mem_affinity *)header; |
1da177e4 LT |
208 | if (!memory_affinity) |
209 | return -EINVAL; | |
210 | ||
211 | acpi_table_print_srat_entry(header); | |
212 | ||
213 | /* let architecture-dependent part to do it */ | |
214 | acpi_numa_memory_affinity_init(memory_affinity); | |
215 | ||
216 | return 0; | |
217 | } | |
218 | ||
15a58ed1 | 219 | static int __init acpi_parse_srat(struct acpi_table_header *table) |
1da177e4 | 220 | { |
4be44fcd | 221 | struct acpi_table_srat *srat; |
1da177e4 | 222 | |
15a58ed1 | 223 | if (!table) |
1da177e4 LT |
224 | return -EINVAL; |
225 | ||
15a58ed1 | 226 | srat = (struct acpi_table_srat *)table; |
1da177e4 LT |
227 | |
228 | return 0; | |
229 | } | |
230 | ||
ae2c6dcf | 231 | static int __init |
15a58ed1 | 232 | acpi_table_parse_srat(enum acpi_srat_type id, |
5a8765a8 | 233 | acpi_table_entry_handler handler, unsigned int max_entries) |
1da177e4 | 234 | { |
6eb87fed | 235 | return acpi_table_parse_entries(ACPI_SIG_SRAT, |
4be44fcd LB |
236 | sizeof(struct acpi_table_srat), id, |
237 | handler, max_entries); | |
1da177e4 LT |
238 | } |
239 | ||
4be44fcd | 240 | int __init acpi_numa_init(void) |
1da177e4 | 241 | { |
1da177e4 | 242 | /* SRAT: Static Resource Affinity Table */ |
7f8f97c3 | 243 | if (!acpi_table_parse(ACPI_SIG_SRAT, acpi_parse_srat)) { |
ae2c6dcf DR |
244 | acpi_table_parse_srat(ACPI_SRAT_TYPE_CPU_AFFINITY, |
245 | acpi_parse_processor_affinity, NR_CPUS); | |
246 | acpi_table_parse_srat(ACPI_SRAT_TYPE_MEMORY_AFFINITY, | |
247 | acpi_parse_memory_affinity, | |
248 | NR_NODE_MEMBLKS); | |
1da177e4 LT |
249 | } |
250 | ||
251 | /* SLIT: System Locality Information Table */ | |
7f8f97c3 | 252 | acpi_table_parse(ACPI_SIG_SLIT, acpi_parse_slit); |
1da177e4 LT |
253 | |
254 | acpi_numa_arch_fixup(); | |
255 | return 0; | |
256 | } | |
257 | ||
7e81ab9d | 258 | int acpi_get_pxm(acpi_handle h) |
1da177e4 | 259 | { |
27663c58 | 260 | unsigned long long pxm; |
1da177e4 LT |
261 | acpi_status status; |
262 | acpi_handle handle; | |
263 | acpi_handle phandle = h; | |
264 | ||
265 | do { | |
266 | handle = phandle; | |
267 | status = acpi_evaluate_integer(handle, "_PXM", NULL, &pxm); | |
268 | if (ACPI_SUCCESS(status)) | |
50dd0969 | 269 | return pxm; |
1da177e4 | 270 | status = acpi_get_parent(handle, &phandle); |
4be44fcd | 271 | } while (ACPI_SUCCESS(status)); |
1da177e4 LT |
272 | return -1; |
273 | } | |
1e3590e2 | 274 | |
7e81ab9d | 275 | int acpi_get_node(acpi_handle *handle) |
1e3590e2 YG |
276 | { |
277 | int pxm, node = -1; | |
278 | ||
1e3590e2 | 279 | pxm = acpi_get_pxm(handle); |
27ce3419 | 280 | if (pxm >= 0 && pxm < MAX_PXM_DOMAINS) |
1e3590e2 YG |
281 | node = acpi_map_pxm_to_node(pxm); |
282 | ||
635227ee | 283 | return node; |
1e3590e2 YG |
284 | } |
285 | EXPORT_SYMBOL(acpi_get_node); |