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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>
David Rientjesb552a8c2009-11-17 14:27:32 -080031#include <linux/numa.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070032#include <acpi/acpi_bus.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070033
Len Browna192a952009-07-28 16:45:54 -040034#define PREFIX "ACPI: "
35
Linus Torvalds1da177e2005-04-16 15:20:36 -070036#define ACPI_NUMA 0x80000000
37#define _COMPONENT ACPI_NUMA
Len Brownf52fd662007-02-12 22:42:12 -050038ACPI_MODULE_NAME("numa");
Linus Torvalds1da177e2005-04-16 15:20:36 -070039
Yasunori Goto762834e2006-06-23 02:03:19 -070040static nodemask_t nodes_found_map = NODE_MASK_NONE;
Yasunori Goto762834e2006-06-23 02:03:19 -070041
42/* maps to convert between proximity domain and logical node ID */
Jan Beulichffada892007-12-13 08:32:26 +000043static int pxm_to_node_map[MAX_PXM_DOMAINS]
David Rientjesb552a8c2009-11-17 14:27:32 -080044 = { [0 ... MAX_PXM_DOMAINS - 1] = NUMA_NO_NODE };
Jan Beulichffada892007-12-13 08:32:26 +000045static int node_to_pxm_map[MAX_NUMNODES]
David Rientjesb552a8c2009-11-17 14:27:32 -080046 = { [0 ... MAX_NUMNODES - 1] = PXM_INVAL };
Yasunori Goto762834e2006-06-23 02:03:19 -070047
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)
David Rientjesb552a8c2009-11-17 14:27:32 -080051 return NUMA_NO_NODE;
Yasunori Goto762834e2006-06-23 02:03:19 -070052 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
David Rientjes3484d792007-07-21 17:10:32 +020062void __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
Luck, Tony8ff6f482007-05-24 13:57:40 -070068int acpi_map_pxm_to_node(int pxm)
Yasunori Goto762834e2006-06-23 02:03:19 -070069{
70 int node = pxm_to_node_map[pxm];
71
David Rientjesb552a8c2009-11-17 14:27:32 -080072 if (node < 0) {
Yasunori Goto762834e2006-06-23 02:03:19 -070073 if (nodes_weight(nodes_found_map) >= MAX_NUMNODES)
David Rientjesb552a8c2009-11-17 14:27:32 -080074 return NUMA_NO_NODE;
Yasunori Goto762834e2006-06-23 02:03:19 -070075 node = first_unset_node(nodes_found_map);
David Rientjes3484d792007-07-21 17:10:32 +020076 __acpi_map_pxm_to_node(pxm, node);
Yasunori Goto762834e2006-06-23 02:03:19 -070077 node_set(node, nodes_found_map);
78 }
79
80 return node;
81}
82
David Rientjesae2c6dc2007-07-21 17:09:56 +020083static void __init
84acpi_table_print_srat_entry(struct acpi_subtable_header *header)
Linus Torvalds1da177e2005-04-16 15:20:36 -070085{
86
Len Brown4be44fc2005-08-05 00:44:28 -040087 ACPI_FUNCTION_NAME("acpi_table_print_srat_entry");
Linus Torvalds1da177e2005-04-16 15:20:36 -070088
89 if (!header)
90 return;
91
92 switch (header->type) {
93
Alexey Starikovskiy15a58ed2007-02-02 19:48:22 +030094 case ACPI_SRAT_TYPE_CPU_AFFINITY:
Linus Torvalds1da177e2005-04-16 15:20:36 -070095#ifdef ACPI_DEBUG_OUTPUT
Len Brown4be44fc2005-08-05 00:44:28 -040096 {
Alexey Starikovskiy15a58ed2007-02-02 19:48:22 +030097 struct acpi_srat_cpu_affinity *p =
98 (struct acpi_srat_cpu_affinity *)header;
Len Brown4be44fc2005-08-05 00:44:28 -040099 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
100 "SRAT Processor (id[0x%02x] eid[0x%02x]) in proximity domain %d %s\n",
Alexey Starikovskiy15a58ed2007-02-02 19:48:22 +0300101 p->apic_id, p->local_sapic_eid,
102 p->proximity_domain_lo,
103 (p->flags & ACPI_SRAT_CPU_ENABLED)?
104 "enabled" : "disabled"));
Len Brown4be44fc2005-08-05 00:44:28 -0400105 }
106#endif /* ACPI_DEBUG_OUTPUT */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700107 break;
108
Alexey Starikovskiy15a58ed2007-02-02 19:48:22 +0300109 case ACPI_SRAT_TYPE_MEMORY_AFFINITY:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700110#ifdef ACPI_DEBUG_OUTPUT
Len Brown4be44fc2005-08-05 00:44:28 -0400111 {
Alexey Starikovskiy15a58ed2007-02-02 19:48:22 +0300112 struct acpi_srat_mem_affinity *p =
113 (struct acpi_srat_mem_affinity *)header;
Len Brown4be44fc2005-08-05 00:44:28 -0400114 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
Bob Moore19d0cfe2008-06-10 15:54:40 +0800115 "SRAT Memory (0x%lx length 0x%lx) in proximity domain %d %s%s\n",
Alexey Starikovskiy15a58ed2007-02-02 19:48:22 +0300116 (unsigned long)p->base_address,
117 (unsigned long)p->length,
Bob Moore19d0cfe2008-06-10 15:54:40 +0800118 p->proximity_domain,
Alexey Starikovskiy15a58ed2007-02-02 19:48:22 +0300119 (p->flags & ACPI_SRAT_MEM_ENABLED)?
120 "enabled" : "disabled",
121 (p->flags & ACPI_SRAT_MEM_HOT_PLUGGABLE)?
122 " hot-pluggable" : ""));
Len Brown4be44fc2005-08-05 00:44:28 -0400123 }
124#endif /* ACPI_DEBUG_OUTPUT */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700125 break;
126
Suresh Siddha7237d3d2009-03-30 13:55:30 -0800127 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;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700142 default:
Len Brown4be44fc2005-08-05 00:44:28 -0400143 printk(KERN_WARNING PREFIX
144 "Found unsupported SRAT entry (type = 0x%x)\n",
145 header->type);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700146 break;
147 }
148}
149
Fenghua Yu39b89312008-06-09 16:48:18 -0700150/*
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 */
156static __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
Alexey Starikovskiy15a58ed2007-02-02 19:48:22 +0300173static int __init acpi_parse_slit(struct acpi_table_header *table)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700174{
Len Brown4be44fc2005-08-05 00:44:28 -0400175 struct acpi_table_slit *slit;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700176
Alexey Starikovskiy15a58ed2007-02-02 19:48:22 +0300177 if (!table)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700178 return -EINVAL;
179
Alexey Starikovskiy15a58ed2007-02-02 19:48:22 +0300180 slit = (struct acpi_table_slit *)table;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700181
Fenghua Yu39b89312008-06-09 16:48:18 -0700182 if (!slit_valid(slit)) {
183 printk(KERN_INFO "ACPI: SLIT table looks invalid. Not used.\n");
184 return -EINVAL;
185 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700186 acpi_numa_slit_init(slit);
187
188 return 0;
189}
190
Suresh Siddha7237d3d2009-03-30 13:55:30 -0800191void __init __attribute__ ((weak))
192acpi_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
Linus Torvalds1da177e2005-04-16 15:20:36 -0700200static int __init
Suresh Siddha7237d3d2009-03-30 13:55:30 -0800201acpi_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
218static int __init
219acpi_parse_processor_affinity(struct acpi_subtable_header *header,
Len Brown4be44fc2005-08-05 00:44:28 -0400220 const unsigned long end)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700221{
Alexey Starikovskiy15a58ed2007-02-02 19:48:22 +0300222 struct acpi_srat_cpu_affinity *processor_affinity;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700223
Alexey Starikovskiy15a58ed2007-02-02 19:48:22 +0300224 processor_affinity = (struct acpi_srat_cpu_affinity *)header;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700225 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
Linus Torvalds1da177e2005-04-16 15:20:36 -0700236static int __init
Alexey Starikovskiy15a58ed2007-02-02 19:48:22 +0300237acpi_parse_memory_affinity(struct acpi_subtable_header * header,
Len Brown4be44fc2005-08-05 00:44:28 -0400238 const unsigned long end)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700239{
Alexey Starikovskiy15a58ed2007-02-02 19:48:22 +0300240 struct acpi_srat_mem_affinity *memory_affinity;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700241
Alexey Starikovskiy15a58ed2007-02-02 19:48:22 +0300242 memory_affinity = (struct acpi_srat_mem_affinity *)header;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700243 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
Alexey Starikovskiy15a58ed2007-02-02 19:48:22 +0300254static int __init acpi_parse_srat(struct acpi_table_header *table)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700255{
Len Brown4be44fc2005-08-05 00:44:28 -0400256 struct acpi_table_srat *srat;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700257
Alexey Starikovskiy15a58ed2007-02-02 19:48:22 +0300258 if (!table)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700259 return -EINVAL;
260
Alexey Starikovskiy15a58ed2007-02-02 19:48:22 +0300261 srat = (struct acpi_table_srat *)table;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700262
263 return 0;
264}
265
David Rientjesae2c6dc2007-07-21 17:09:56 +0200266static int __init
Alexey Starikovskiy15a58ed2007-02-02 19:48:22 +0300267acpi_table_parse_srat(enum acpi_srat_type id,
Len Brown5a8765a2007-02-10 21:35:47 -0500268 acpi_table_entry_handler handler, unsigned int max_entries)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700269{
Len Brown6eb87fe2007-02-10 22:17:07 -0500270 return acpi_table_parse_entries(ACPI_SIG_SRAT,
Len Brown4be44fc2005-08-05 00:44:28 -0400271 sizeof(struct acpi_table_srat), id,
272 handler, max_entries);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700273}
274
Len Brown4be44fc2005-08-05 00:44:28 -0400275int __init acpi_numa_init(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700276{
David Rientjes87162732009-09-25 15:20:04 -0700277 int ret = 0;
278
Linus Torvalds1da177e2005-04-16 15:20:36 -0700279 /* SRAT: Static Resource Affinity Table */
Len Brown7f8f97c2007-02-10 21:28:03 -0500280 if (!acpi_table_parse(ACPI_SIG_SRAT, acpi_parse_srat)) {
Suresh Siddha7237d3d2009-03-30 13:55:30 -0800281 acpi_table_parse_srat(ACPI_SRAT_TYPE_X2APIC_CPU_AFFINITY,
282 acpi_parse_x2apic_affinity, NR_CPUS);
David Rientjesae2c6dc2007-07-21 17:09:56 +0200283 acpi_table_parse_srat(ACPI_SRAT_TYPE_CPU_AFFINITY,
284 acpi_parse_processor_affinity, NR_CPUS);
David Rientjes87162732009-09-25 15:20:04 -0700285 ret = acpi_table_parse_srat(ACPI_SRAT_TYPE_MEMORY_AFFINITY,
286 acpi_parse_memory_affinity,
287 NR_NODE_MEMBLKS);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700288 }
289
290 /* SLIT: System Locality Information Table */
Len Brown7f8f97c2007-02-10 21:28:03 -0500291 acpi_table_parse(ACPI_SIG_SLIT, acpi_parse_slit);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700292
293 acpi_numa_arch_fixup();
David Rientjes87162732009-09-25 15:20:04 -0700294 return ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700295}
296
Yasunori Goto7e81ab92007-05-08 20:27:01 -0700297int acpi_get_pxm(acpi_handle h)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700298{
Matthew Wilcox27663c52008-10-10 02:22:59 -0400299 unsigned long long pxm;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700300 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))
Jan Engelhardt50dd0962006-10-01 00:28:50 +0200308 return pxm;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700309 status = acpi_get_parent(handle, &phandle);
Len Brown4be44fc2005-08-05 00:44:28 -0400310 } while (ACPI_SUCCESS(status));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700311 return -1;
312}
Yasunori Goto1e3590e2006-06-27 02:53:31 -0700313
Yasunori Goto7e81ab92007-05-08 20:27:01 -0700314int acpi_get_node(acpi_handle *handle)
Yasunori Goto1e3590e2006-06-27 02:53:31 -0700315{
316 int pxm, node = -1;
317
Yasunori Goto1e3590e2006-06-27 02:53:31 -0700318 pxm = acpi_get_pxm(handle);
Cyrill Gorcunov27ce3412009-03-04 11:55:29 -0800319 if (pxm >= 0 && pxm < MAX_PXM_DOMAINS)
Yasunori Goto1e3590e2006-06-27 02:53:31 -0700320 node = acpi_map_pxm_to_node(pxm);
321
Len Brown635227e2006-07-01 16:48:23 -0400322 return node;
Yasunori Goto1e3590e2006-06-27 02:53:31 -0700323}
324EXPORT_SYMBOL(acpi_get_node);