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Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
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>
Linus Torvalds1da177e2005-04-16 15:20:36 -070026#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
Len Brownf52fd662007-02-12 22:42:12 -050036ACPI_MODULE_NAME("numa");
Linus Torvalds1da177e2005-04-16 15:20:36 -070037
Yasunori Goto762834e2006-06-23 02:03:19 -070038static 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 */
Aaron Durbinf363d162007-05-16 22:11:06 -070043static int pxm_to_node_map[MAX_PXM_DOMAINS]
Yasunori Goto762834e2006-06-23 02:03:19 -070044 = { [0 ... MAX_PXM_DOMAINS - 1] = NID_INVAL };
Aaron Durbinf363d162007-05-16 22:11:06 -070045static int node_to_pxm_map[MAX_NUMNODES]
Yasunori Goto762834e2006-06-23 02:03:19 -070046 = { [0 ... MAX_NUMNODES - 1] = PXM_INVAL };
47
Aaron Durbinf363d162007-05-16 22:11:06 -070048int pxm_to_node(int pxm)
Yasunori Goto762834e2006-06-23 02:03:19 -070049{
50 if (pxm < 0)
51 return NID_INVAL;
52 return pxm_to_node_map[pxm];
53}
54
Aaron Durbinf363d162007-05-16 22:11:06 -070055int node_to_pxm(int node)
Yasunori Goto762834e2006-06-23 02:03:19 -070056{
57 if (node < 0)
58 return PXM_INVAL;
59 return node_to_pxm_map[node];
60}
61
62int __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
78void __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
Alexey Starikovskiy15a58ed2007-02-02 19:48:22 +030086void __init acpi_table_print_srat_entry(struct acpi_subtable_header * header)
Linus Torvalds1da177e2005-04-16 15:20:36 -070087{
88
Len Brown4be44fc2005-08-05 00:44:28 -040089 ACPI_FUNCTION_NAME("acpi_table_print_srat_entry");
Linus Torvalds1da177e2005-04-16 15:20:36 -070090
91 if (!header)
92 return;
93
94 switch (header->type) {
95
Alexey Starikovskiy15a58ed2007-02-02 19:48:22 +030096 case ACPI_SRAT_TYPE_CPU_AFFINITY:
Linus Torvalds1da177e2005-04-16 15:20:36 -070097#ifdef ACPI_DEBUG_OUTPUT
Len Brown4be44fc2005-08-05 00:44:28 -040098 {
Alexey Starikovskiy15a58ed2007-02-02 19:48:22 +030099 struct acpi_srat_cpu_affinity *p =
100 (struct acpi_srat_cpu_affinity *)header;
Len Brown4be44fc2005-08-05 00:44:28 -0400101 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
102 "SRAT Processor (id[0x%02x] eid[0x%02x]) in proximity domain %d %s\n",
Alexey Starikovskiy15a58ed2007-02-02 19:48:22 +0300103 p->apic_id, p->local_sapic_eid,
104 p->proximity_domain_lo,
105 (p->flags & ACPI_SRAT_CPU_ENABLED)?
106 "enabled" : "disabled"));
Len Brown4be44fc2005-08-05 00:44:28 -0400107 }
108#endif /* ACPI_DEBUG_OUTPUT */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700109 break;
110
Alexey Starikovskiy15a58ed2007-02-02 19:48:22 +0300111 case ACPI_SRAT_TYPE_MEMORY_AFFINITY:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700112#ifdef ACPI_DEBUG_OUTPUT
Len Brown4be44fc2005-08-05 00:44:28 -0400113 {
Alexey Starikovskiy15a58ed2007-02-02 19:48:22 +0300114 struct acpi_srat_mem_affinity *p =
115 (struct acpi_srat_mem_affinity *)header;
Len Brown4be44fc2005-08-05 00:44:28 -0400116 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
Alexey Starikovskiy15a58ed2007-02-02 19:48:22 +0300117 "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,
Len Brown4be44fc2005-08-05 00:44:28 -0400120 p->memory_type, p->proximity_domain,
Alexey Starikovskiy15a58ed2007-02-02 19:48:22 +0300121 (p->flags & ACPI_SRAT_MEM_ENABLED)?
122 "enabled" : "disabled",
123 (p->flags & ACPI_SRAT_MEM_HOT_PLUGGABLE)?
124 " hot-pluggable" : ""));
Len Brown4be44fc2005-08-05 00:44:28 -0400125 }
126#endif /* ACPI_DEBUG_OUTPUT */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700127 break;
128
129 default:
Len Brown4be44fc2005-08-05 00:44:28 -0400130 printk(KERN_WARNING PREFIX
131 "Found unsupported SRAT entry (type = 0x%x)\n",
132 header->type);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700133 break;
134 }
135}
136
Alexey Starikovskiy15a58ed2007-02-02 19:48:22 +0300137static int __init acpi_parse_slit(struct acpi_table_header *table)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700138{
Len Brown4be44fc2005-08-05 00:44:28 -0400139 struct acpi_table_slit *slit;
140 u32 localities;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700141
Alexey Starikovskiy15a58ed2007-02-02 19:48:22 +0300142 if (!table)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700143 return -EINVAL;
144
Alexey Starikovskiy15a58ed2007-02-02 19:48:22 +0300145 slit = (struct acpi_table_slit *)table;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700146
147 /* downcast just for %llu vs %lu for i386/ia64 */
Alexey Starikovskiy15a58ed2007-02-02 19:48:22 +0300148 localities = (u32) slit->locality_count;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700149
150 acpi_numa_slit_init(slit);
151
152 return 0;
153}
154
Linus Torvalds1da177e2005-04-16 15:20:36 -0700155static int __init
Alexey Starikovskiy15a58ed2007-02-02 19:48:22 +0300156acpi_parse_processor_affinity(struct acpi_subtable_header * header,
Len Brown4be44fc2005-08-05 00:44:28 -0400157 const unsigned long end)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700158{
Alexey Starikovskiy15a58ed2007-02-02 19:48:22 +0300159 struct acpi_srat_cpu_affinity *processor_affinity;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700160
Alexey Starikovskiy15a58ed2007-02-02 19:48:22 +0300161 processor_affinity = (struct acpi_srat_cpu_affinity *)header;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700162 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
Linus Torvalds1da177e2005-04-16 15:20:36 -0700173static int __init
Alexey Starikovskiy15a58ed2007-02-02 19:48:22 +0300174acpi_parse_memory_affinity(struct acpi_subtable_header * header,
Len Brown4be44fc2005-08-05 00:44:28 -0400175 const unsigned long end)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700176{
Alexey Starikovskiy15a58ed2007-02-02 19:48:22 +0300177 struct acpi_srat_mem_affinity *memory_affinity;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700178
Alexey Starikovskiy15a58ed2007-02-02 19:48:22 +0300179 memory_affinity = (struct acpi_srat_mem_affinity *)header;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700180 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
Alexey Starikovskiy15a58ed2007-02-02 19:48:22 +0300191static int __init acpi_parse_srat(struct acpi_table_header *table)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700192{
Len Brown4be44fc2005-08-05 00:44:28 -0400193 struct acpi_table_srat *srat;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700194
Alexey Starikovskiy15a58ed2007-02-02 19:48:22 +0300195 if (!table)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700196 return -EINVAL;
197
Alexey Starikovskiy15a58ed2007-02-02 19:48:22 +0300198 srat = (struct acpi_table_srat *)table;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700199
200 return 0;
201}
202
Linus Torvalds1da177e2005-04-16 15:20:36 -0700203int __init
Alexey Starikovskiy15a58ed2007-02-02 19:48:22 +0300204acpi_table_parse_srat(enum acpi_srat_type id,
Len Brown5a8765a2007-02-10 21:35:47 -0500205 acpi_table_entry_handler handler, unsigned int max_entries)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700206{
Len Brown6eb87fe2007-02-10 22:17:07 -0500207 return acpi_table_parse_entries(ACPI_SIG_SRAT,
Len Brown4be44fc2005-08-05 00:44:28 -0400208 sizeof(struct acpi_table_srat), id,
209 handler, max_entries);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700210}
211
Len Brown4be44fc2005-08-05 00:44:28 -0400212int __init acpi_numa_init(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700213{
Len Brown4be44fc2005-08-05 00:44:28 -0400214 int result;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700215
216 /* SRAT: Static Resource Affinity Table */
Len Brown7f8f97c2007-02-10 21:28:03 -0500217 if (!acpi_table_parse(ACPI_SIG_SRAT, acpi_parse_srat)) {
Alexey Starikovskiy15a58ed2007-02-02 19:48:22 +0300218 result = acpi_table_parse_srat(ACPI_SRAT_TYPE_CPU_AFFINITY,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700219 acpi_parse_processor_affinity,
220 NR_CPUS);
Alexey Starikovskiy15a58ed2007-02-02 19:48:22 +0300221 result = acpi_table_parse_srat(ACPI_SRAT_TYPE_MEMORY_AFFINITY, acpi_parse_memory_affinity, NR_NODE_MEMBLKS); // IA64 specific
Linus Torvalds1da177e2005-04-16 15:20:36 -0700222 }
223
224 /* SLIT: System Locality Information Table */
Len Brown7f8f97c2007-02-10 21:28:03 -0500225 acpi_table_parse(ACPI_SIG_SLIT, acpi_parse_slit);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700226
227 acpi_numa_arch_fixup();
228 return 0;
229}
230
Yasunori Goto7e81ab92007-05-08 20:27:01 -0700231int acpi_get_pxm(acpi_handle h)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700232{
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))
Jan Engelhardt50dd0962006-10-01 00:28:50 +0200242 return pxm;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700243 status = acpi_get_parent(handle, &phandle);
Len Brown4be44fc2005-08-05 00:44:28 -0400244 } while (ACPI_SUCCESS(status));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700245 return -1;
246}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700247EXPORT_SYMBOL(acpi_get_pxm);
Yasunori Goto1e3590e2006-06-27 02:53:31 -0700248
Yasunori Goto7e81ab92007-05-08 20:27:01 -0700249int acpi_get_node(acpi_handle *handle)
Yasunori Goto1e3590e2006-06-27 02:53:31 -0700250{
251 int pxm, node = -1;
252
Yasunori Goto1e3590e2006-06-27 02:53:31 -0700253 pxm = acpi_get_pxm(handle);
254 if (pxm >= 0)
255 node = acpi_map_pxm_to_node(pxm);
256
Len Brown635227e2006-07-01 16:48:23 -0400257 return node;
Yasunori Goto1e3590e2006-06-27 02:53:31 -0700258}
259EXPORT_SYMBOL(acpi_get_node);