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> | |
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 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 | ||
762834e8 YG |
48 | int __cpuinit pxm_to_node(int pxm) |
49 | { | |
50 | if (pxm < 0) | |
51 | return NID_INVAL; | |
52 | return pxm_to_node_map[pxm]; | |
53 | } | |
54 | ||
55 | int __cpuinit node_to_pxm(int node) | |
56 | { | |
57 | if (node < 0) | |
58 | return PXM_INVAL; | |
59 | return node_to_pxm_map[node]; | |
60 | } | |
61 | ||
62 | int __cpuinit acpi_map_pxm_to_node(int pxm) | |
63 | { | |
64 | int node = pxm_to_node_map[pxm]; | |
65 | ||
66 | if (node < 0){ | |
67 | if (nodes_weight(nodes_found_map) >= MAX_NUMNODES) | |
68 | return NID_INVAL; | |
69 | node = first_unset_node(nodes_found_map); | |
70 | pxm_to_node_map[pxm] = node; | |
71 | node_to_pxm_map[node] = pxm; | |
72 | node_set(node, nodes_found_map); | |
73 | } | |
74 | ||
75 | return node; | |
76 | } | |
77 | ||
78 | void __cpuinit acpi_unmap_pxm_to_node(int node) | |
79 | { | |
80 | int pxm = node_to_pxm_map[node]; | |
81 | pxm_to_node_map[pxm] = NID_INVAL; | |
82 | node_to_pxm_map[node] = PXM_INVAL; | |
83 | node_clear(node, nodes_found_map); | |
84 | } | |
85 | ||
15a58ed1 | 86 | void __init acpi_table_print_srat_entry(struct acpi_subtable_header * header) |
1da177e4 LT |
87 | { |
88 | ||
4be44fcd | 89 | ACPI_FUNCTION_NAME("acpi_table_print_srat_entry"); |
1da177e4 LT |
90 | |
91 | if (!header) | |
92 | return; | |
93 | ||
94 | switch (header->type) { | |
95 | ||
15a58ed1 | 96 | case ACPI_SRAT_TYPE_CPU_AFFINITY: |
1da177e4 | 97 | #ifdef ACPI_DEBUG_OUTPUT |
4be44fcd | 98 | { |
15a58ed1 AS |
99 | struct acpi_srat_cpu_affinity *p = |
100 | (struct acpi_srat_cpu_affinity *)header; | |
4be44fcd LB |
101 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
102 | "SRAT Processor (id[0x%02x] eid[0x%02x]) in proximity domain %d %s\n", | |
15a58ed1 AS |
103 | p->apic_id, p->local_sapic_eid, |
104 | p->proximity_domain_lo, | |
105 | (p->flags & ACPI_SRAT_CPU_ENABLED)? | |
106 | "enabled" : "disabled")); | |
4be44fcd LB |
107 | } |
108 | #endif /* ACPI_DEBUG_OUTPUT */ | |
1da177e4 LT |
109 | break; |
110 | ||
15a58ed1 | 111 | case ACPI_SRAT_TYPE_MEMORY_AFFINITY: |
1da177e4 | 112 | #ifdef ACPI_DEBUG_OUTPUT |
4be44fcd | 113 | { |
15a58ed1 AS |
114 | struct acpi_srat_mem_affinity *p = |
115 | (struct acpi_srat_mem_affinity *)header; | |
4be44fcd | 116 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
15a58ed1 AS |
117 | "SRAT Memory (0x%lx length 0x%lx type 0x%x) in proximity domain %d %s%s\n", |
118 | (unsigned long)p->base_address, | |
119 | (unsigned long)p->length, | |
4be44fcd | 120 | p->memory_type, p->proximity_domain, |
15a58ed1 AS |
121 | (p->flags & ACPI_SRAT_MEM_ENABLED)? |
122 | "enabled" : "disabled", | |
123 | (p->flags & ACPI_SRAT_MEM_HOT_PLUGGABLE)? | |
124 | " hot-pluggable" : "")); | |
4be44fcd LB |
125 | } |
126 | #endif /* ACPI_DEBUG_OUTPUT */ | |
1da177e4 LT |
127 | break; |
128 | ||
129 | default: | |
4be44fcd LB |
130 | printk(KERN_WARNING PREFIX |
131 | "Found unsupported SRAT entry (type = 0x%x)\n", | |
132 | header->type); | |
1da177e4 LT |
133 | break; |
134 | } | |
135 | } | |
136 | ||
15a58ed1 | 137 | static int __init acpi_parse_slit(struct acpi_table_header *table) |
1da177e4 | 138 | { |
4be44fcd LB |
139 | struct acpi_table_slit *slit; |
140 | u32 localities; | |
1da177e4 | 141 | |
15a58ed1 | 142 | if (!table) |
1da177e4 LT |
143 | return -EINVAL; |
144 | ||
15a58ed1 | 145 | slit = (struct acpi_table_slit *)table; |
1da177e4 LT |
146 | |
147 | /* downcast just for %llu vs %lu for i386/ia64 */ | |
15a58ed1 | 148 | localities = (u32) slit->locality_count; |
1da177e4 LT |
149 | |
150 | acpi_numa_slit_init(slit); | |
151 | ||
152 | return 0; | |
153 | } | |
154 | ||
1da177e4 | 155 | static int __init |
15a58ed1 | 156 | acpi_parse_processor_affinity(struct acpi_subtable_header * header, |
4be44fcd | 157 | const unsigned long end) |
1da177e4 | 158 | { |
15a58ed1 | 159 | struct acpi_srat_cpu_affinity *processor_affinity; |
1da177e4 | 160 | |
15a58ed1 | 161 | processor_affinity = (struct acpi_srat_cpu_affinity *)header; |
1da177e4 LT |
162 | if (!processor_affinity) |
163 | return -EINVAL; | |
164 | ||
165 | acpi_table_print_srat_entry(header); | |
166 | ||
167 | /* let architecture-dependent part to do it */ | |
168 | acpi_numa_processor_affinity_init(processor_affinity); | |
169 | ||
170 | return 0; | |
171 | } | |
172 | ||
1da177e4 | 173 | static int __init |
15a58ed1 | 174 | acpi_parse_memory_affinity(struct acpi_subtable_header * header, |
4be44fcd | 175 | const unsigned long end) |
1da177e4 | 176 | { |
15a58ed1 | 177 | struct acpi_srat_mem_affinity *memory_affinity; |
1da177e4 | 178 | |
15a58ed1 | 179 | memory_affinity = (struct acpi_srat_mem_affinity *)header; |
1da177e4 LT |
180 | if (!memory_affinity) |
181 | return -EINVAL; | |
182 | ||
183 | acpi_table_print_srat_entry(header); | |
184 | ||
185 | /* let architecture-dependent part to do it */ | |
186 | acpi_numa_memory_affinity_init(memory_affinity); | |
187 | ||
188 | return 0; | |
189 | } | |
190 | ||
15a58ed1 | 191 | static int __init acpi_parse_srat(struct acpi_table_header *table) |
1da177e4 | 192 | { |
4be44fcd | 193 | struct acpi_table_srat *srat; |
1da177e4 | 194 | |
15a58ed1 | 195 | if (!table) |
1da177e4 LT |
196 | return -EINVAL; |
197 | ||
15a58ed1 | 198 | srat = (struct acpi_table_srat *)table; |
1da177e4 LT |
199 | |
200 | return 0; | |
201 | } | |
202 | ||
1da177e4 | 203 | int __init |
15a58ed1 | 204 | acpi_table_parse_srat(enum acpi_srat_type id, |
5a8765a8 | 205 | acpi_table_entry_handler handler, unsigned int max_entries) |
1da177e4 | 206 | { |
6eb87fed | 207 | return acpi_table_parse_entries(ACPI_SIG_SRAT, |
4be44fcd LB |
208 | sizeof(struct acpi_table_srat), id, |
209 | handler, max_entries); | |
1da177e4 LT |
210 | } |
211 | ||
4be44fcd | 212 | int __init acpi_numa_init(void) |
1da177e4 | 213 | { |
4be44fcd | 214 | int result; |
1da177e4 LT |
215 | |
216 | /* SRAT: Static Resource Affinity Table */ | |
7f8f97c3 | 217 | if (!acpi_table_parse(ACPI_SIG_SRAT, acpi_parse_srat)) { |
15a58ed1 | 218 | result = acpi_table_parse_srat(ACPI_SRAT_TYPE_CPU_AFFINITY, |
1da177e4 LT |
219 | acpi_parse_processor_affinity, |
220 | NR_CPUS); | |
15a58ed1 | 221 | result = acpi_table_parse_srat(ACPI_SRAT_TYPE_MEMORY_AFFINITY, acpi_parse_memory_affinity, NR_NODE_MEMBLKS); // IA64 specific |
1da177e4 LT |
222 | } |
223 | ||
224 | /* SLIT: System Locality Information Table */ | |
7f8f97c3 | 225 | acpi_table_parse(ACPI_SIG_SLIT, acpi_parse_slit); |
1da177e4 LT |
226 | |
227 | acpi_numa_arch_fixup(); | |
228 | return 0; | |
229 | } | |
230 | ||
7e81ab9d | 231 | int acpi_get_pxm(acpi_handle h) |
1da177e4 LT |
232 | { |
233 | unsigned long pxm; | |
234 | acpi_status status; | |
235 | acpi_handle handle; | |
236 | acpi_handle phandle = h; | |
237 | ||
238 | do { | |
239 | handle = phandle; | |
240 | status = acpi_evaluate_integer(handle, "_PXM", NULL, &pxm); | |
241 | if (ACPI_SUCCESS(status)) | |
50dd0969 | 242 | return pxm; |
1da177e4 | 243 | status = acpi_get_parent(handle, &phandle); |
4be44fcd | 244 | } while (ACPI_SUCCESS(status)); |
1da177e4 LT |
245 | return -1; |
246 | } | |
247 | EXPORT_SYMBOL(acpi_get_pxm); | |
1e3590e2 | 248 | |
7e81ab9d | 249 | int acpi_get_node(acpi_handle *handle) |
1e3590e2 YG |
250 | { |
251 | int pxm, node = -1; | |
252 | ||
1e3590e2 YG |
253 | pxm = acpi_get_pxm(handle); |
254 | if (pxm >= 0) | |
255 | node = acpi_map_pxm_to_node(pxm); | |
256 | ||
635227ee | 257 | return node; |
1e3590e2 YG |
258 | } |
259 | EXPORT_SYMBOL(acpi_get_node); |