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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
Kurt Garloff8df0eb7c2012-01-17 04:18:02 -050048unsigned char acpi_srat_revision __initdata;
49
Aaron Durbinf363d162007-05-16 22:11:06 -070050int pxm_to_node(int pxm)
Yasunori Goto762834e2006-06-23 02:03:19 -070051{
52 if (pxm < 0)
David Rientjesb552a8c2009-11-17 14:27:32 -080053 return NUMA_NO_NODE;
Yasunori Goto762834e2006-06-23 02:03:19 -070054 return pxm_to_node_map[pxm];
55}
56
Aaron Durbinf363d162007-05-16 22:11:06 -070057int node_to_pxm(int node)
Yasunori Goto762834e2006-06-23 02:03:19 -070058{
59 if (node < 0)
60 return PXM_INVAL;
61 return node_to_pxm_map[node];
62}
63
David Rientjes3484d792007-07-21 17:10:32 +020064void __acpi_map_pxm_to_node(int pxm, int node)
65{
David Rientjes0f9b75e2010-03-25 16:33:04 -070066 if (pxm_to_node_map[pxm] == NUMA_NO_NODE || node < pxm_to_node_map[pxm])
67 pxm_to_node_map[pxm] = node;
68 if (node_to_pxm_map[node] == PXM_INVAL || pxm < node_to_pxm_map[node])
69 node_to_pxm_map[node] = pxm;
David Rientjes3484d792007-07-21 17:10:32 +020070}
71
Luck, Tony8ff6f482007-05-24 13:57:40 -070072int acpi_map_pxm_to_node(int pxm)
Yasunori Goto762834e2006-06-23 02:03:19 -070073{
74 int node = pxm_to_node_map[pxm];
75
David Rientjesb552a8c2009-11-17 14:27:32 -080076 if (node < 0) {
Yasunori Goto762834e2006-06-23 02:03:19 -070077 if (nodes_weight(nodes_found_map) >= MAX_NUMNODES)
David Rientjesb552a8c2009-11-17 14:27:32 -080078 return NUMA_NO_NODE;
Yasunori Goto762834e2006-06-23 02:03:19 -070079 node = first_unset_node(nodes_found_map);
David Rientjes3484d792007-07-21 17:10:32 +020080 __acpi_map_pxm_to_node(pxm, node);
Yasunori Goto762834e2006-06-23 02:03:19 -070081 node_set(node, nodes_found_map);
82 }
83
84 return node;
85}
86
David Rientjesae2c6dc2007-07-21 17:09:56 +020087static void __init
88acpi_table_print_srat_entry(struct acpi_subtable_header *header)
Linus Torvalds1da177e2005-04-16 15:20:36 -070089{
90
Len Brown4be44fc2005-08-05 00:44:28 -040091 ACPI_FUNCTION_NAME("acpi_table_print_srat_entry");
Linus Torvalds1da177e2005-04-16 15:20:36 -070092
93 if (!header)
94 return;
95
96 switch (header->type) {
97
Alexey Starikovskiy15a58ed2007-02-02 19:48:22 +030098 case ACPI_SRAT_TYPE_CPU_AFFINITY:
Linus Torvalds1da177e2005-04-16 15:20:36 -070099#ifdef ACPI_DEBUG_OUTPUT
Len Brown4be44fc2005-08-05 00:44:28 -0400100 {
Alexey Starikovskiy15a58ed2007-02-02 19:48:22 +0300101 struct acpi_srat_cpu_affinity *p =
102 (struct acpi_srat_cpu_affinity *)header;
Len Brown4be44fc2005-08-05 00:44:28 -0400103 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
104 "SRAT Processor (id[0x%02x] eid[0x%02x]) in proximity domain %d %s\n",
Alexey Starikovskiy15a58ed2007-02-02 19:48:22 +0300105 p->apic_id, p->local_sapic_eid,
106 p->proximity_domain_lo,
107 (p->flags & ACPI_SRAT_CPU_ENABLED)?
108 "enabled" : "disabled"));
Len Brown4be44fc2005-08-05 00:44:28 -0400109 }
110#endif /* ACPI_DEBUG_OUTPUT */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700111 break;
112
Alexey Starikovskiy15a58ed2007-02-02 19:48:22 +0300113 case ACPI_SRAT_TYPE_MEMORY_AFFINITY:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700114#ifdef ACPI_DEBUG_OUTPUT
Len Brown4be44fc2005-08-05 00:44:28 -0400115 {
Alexey Starikovskiy15a58ed2007-02-02 19:48:22 +0300116 struct acpi_srat_mem_affinity *p =
117 (struct acpi_srat_mem_affinity *)header;
Len Brown4be44fc2005-08-05 00:44:28 -0400118 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
Davidlohr Bueso208f6cc2013-01-09 22:06:08 +0000119 "SRAT Memory (0x%lx length 0x%lx) in proximity domain %d %s%s%s\n",
Alexey Starikovskiy15a58ed2007-02-02 19:48:22 +0300120 (unsigned long)p->base_address,
121 (unsigned long)p->length,
Bob Moore19d0cfe2008-06-10 15:54:40 +0800122 p->proximity_domain,
Alexey Starikovskiy15a58ed2007-02-02 19:48:22 +0300123 (p->flags & ACPI_SRAT_MEM_ENABLED)?
124 "enabled" : "disabled",
125 (p->flags & ACPI_SRAT_MEM_HOT_PLUGGABLE)?
Davidlohr Bueso208f6cc2013-01-09 22:06:08 +0000126 " hot-pluggable" : "",
127 (p->flags & ACPI_SRAT_MEM_NON_VOLATILE)?
128 " non-volatile" : ""));
Len Brown4be44fc2005-08-05 00:44:28 -0400129 }
130#endif /* ACPI_DEBUG_OUTPUT */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700131 break;
132
Suresh Siddha7237d3d2009-03-30 13:55:30 -0800133 case ACPI_SRAT_TYPE_X2APIC_CPU_AFFINITY:
134#ifdef ACPI_DEBUG_OUTPUT
135 {
136 struct acpi_srat_x2apic_cpu_affinity *p =
137 (struct acpi_srat_x2apic_cpu_affinity *)header;
138 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
139 "SRAT Processor (x2apicid[0x%08x]) in"
140 " proximity domain %d %s\n",
141 p->apic_id,
142 p->proximity_domain,
143 (p->flags & ACPI_SRAT_CPU_ENABLED) ?
144 "enabled" : "disabled"));
145 }
146#endif /* ACPI_DEBUG_OUTPUT */
147 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700148 default:
Len Brown4be44fc2005-08-05 00:44:28 -0400149 printk(KERN_WARNING PREFIX
150 "Found unsupported SRAT entry (type = 0x%x)\n",
151 header->type);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700152 break;
153 }
154}
155
Fenghua Yu39b89312008-06-09 16:48:18 -0700156/*
157 * A lot of BIOS fill in 10 (= no distance) everywhere. This messes
158 * up the NUMA heuristics which wants the local node to have a smaller
159 * distance than the others.
160 * Do some quick checks here and only use the SLIT if it passes.
161 */
162static __init int slit_valid(struct acpi_table_slit *slit)
163{
164 int i, j;
165 int d = slit->locality_count;
166 for (i = 0; i < d; i++) {
167 for (j = 0; j < d; j++) {
168 u8 val = slit->entry[d*i + j];
169 if (i == j) {
170 if (val != LOCAL_DISTANCE)
171 return 0;
172 } else if (val <= LOCAL_DISTANCE)
173 return 0;
174 }
175 }
176 return 1;
177}
178
Alexey Starikovskiy15a58ed2007-02-02 19:48:22 +0300179static int __init acpi_parse_slit(struct acpi_table_header *table)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700180{
Len Brown4be44fc2005-08-05 00:44:28 -0400181 struct acpi_table_slit *slit;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700182
Alexey Starikovskiy15a58ed2007-02-02 19:48:22 +0300183 if (!table)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700184 return -EINVAL;
185
Alexey Starikovskiy15a58ed2007-02-02 19:48:22 +0300186 slit = (struct acpi_table_slit *)table;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700187
Fenghua Yu39b89312008-06-09 16:48:18 -0700188 if (!slit_valid(slit)) {
189 printk(KERN_INFO "ACPI: SLIT table looks invalid. Not used.\n");
190 return -EINVAL;
191 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700192 acpi_numa_slit_init(slit);
193
194 return 0;
195}
196
Suresh Siddha7237d3d2009-03-30 13:55:30 -0800197void __init __attribute__ ((weak))
198acpi_numa_x2apic_affinity_init(struct acpi_srat_x2apic_cpu_affinity *pa)
199{
200 printk(KERN_WARNING PREFIX
201 "Found unsupported x2apic [0x%08x] SRAT entry\n", pa->apic_id);
202 return;
203}
204
205
Linus Torvalds1da177e2005-04-16 15:20:36 -0700206static int __init
Suresh Siddha7237d3d2009-03-30 13:55:30 -0800207acpi_parse_x2apic_affinity(struct acpi_subtable_header *header,
208 const unsigned long end)
209{
210 struct acpi_srat_x2apic_cpu_affinity *processor_affinity;
211
212 processor_affinity = (struct acpi_srat_x2apic_cpu_affinity *)header;
213 if (!processor_affinity)
214 return -EINVAL;
215
216 acpi_table_print_srat_entry(header);
217
218 /* let architecture-dependent part to do it */
219 acpi_numa_x2apic_affinity_init(processor_affinity);
220
221 return 0;
222}
223
224static int __init
225acpi_parse_processor_affinity(struct acpi_subtable_header *header,
Len Brown4be44fc2005-08-05 00:44:28 -0400226 const unsigned long end)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700227{
Alexey Starikovskiy15a58ed2007-02-02 19:48:22 +0300228 struct acpi_srat_cpu_affinity *processor_affinity;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700229
Alexey Starikovskiy15a58ed2007-02-02 19:48:22 +0300230 processor_affinity = (struct acpi_srat_cpu_affinity *)header;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700231 if (!processor_affinity)
232 return -EINVAL;
233
234 acpi_table_print_srat_entry(header);
235
236 /* let architecture-dependent part to do it */
237 acpi_numa_processor_affinity_init(processor_affinity);
238
239 return 0;
240}
241
Thomas Renninger095adbb2012-07-31 17:41:09 +0200242static int __initdata parsed_numa_memblks;
243
Linus Torvalds1da177e2005-04-16 15:20:36 -0700244static int __init
Alexey Starikovskiy15a58ed2007-02-02 19:48:22 +0300245acpi_parse_memory_affinity(struct acpi_subtable_header * header,
Len Brown4be44fc2005-08-05 00:44:28 -0400246 const unsigned long end)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700247{
Alexey Starikovskiy15a58ed2007-02-02 19:48:22 +0300248 struct acpi_srat_mem_affinity *memory_affinity;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700249
Alexey Starikovskiy15a58ed2007-02-02 19:48:22 +0300250 memory_affinity = (struct acpi_srat_mem_affinity *)header;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700251 if (!memory_affinity)
252 return -EINVAL;
253
254 acpi_table_print_srat_entry(header);
255
256 /* let architecture-dependent part to do it */
Thomas Renninger095adbb2012-07-31 17:41:09 +0200257 if (!acpi_numa_memory_affinity_init(memory_affinity))
258 parsed_numa_memblks++;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700259 return 0;
260}
261
Alexey Starikovskiy15a58ed2007-02-02 19:48:22 +0300262static int __init acpi_parse_srat(struct acpi_table_header *table)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700263{
Kurt Garloff8df0eb7c2012-01-17 04:18:02 -0500264 struct acpi_table_srat *srat;
Alexey Starikovskiy15a58ed2007-02-02 19:48:22 +0300265 if (!table)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700266 return -EINVAL;
267
Kurt Garloff8df0eb7c2012-01-17 04:18:02 -0500268 srat = (struct acpi_table_srat *)table;
269 acpi_srat_revision = srat->header.revision;
270
Andi Kleencfa806f2010-07-20 15:18:36 -0700271 /* Real work done in acpi_table_parse_srat below. */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700272
273 return 0;
274}
275
David Rientjesae2c6dc2007-07-21 17:09:56 +0200276static int __init
Alexey Starikovskiy15a58ed2007-02-02 19:48:22 +0300277acpi_table_parse_srat(enum acpi_srat_type id,
Lv Zhengb43e1062013-01-12 15:29:38 +0000278 acpi_tbl_entry_handler handler, unsigned int max_entries)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700279{
Len Brown6eb87fe2007-02-10 22:17:07 -0500280 return acpi_table_parse_entries(ACPI_SIG_SRAT,
Len Brown4be44fc2005-08-05 00:44:28 -0400281 sizeof(struct acpi_table_srat), id,
282 handler, max_entries);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700283}
284
Yinghai Lu20e69262013-03-01 14:51:27 -0800285int __init acpi_numa_init(void)
Tang Chene8d19552013-02-22 16:33:44 -0800286{
Yinghai Lu20e69262013-03-01 14:51:27 -0800287 int cnt = 0;
288
Yinghai Lud3bd0582010-12-16 19:09:58 -0800289 /*
290 * Should not limit number with cpu num that is from NR_CPUS or nr_cpus=
291 * SRAT cpu entries could have different order with that in MADT.
292 * So go over all cpu entries in SRAT to get apicid to node mapping.
293 */
David Rientjes87162732009-09-25 15:20:04 -0700294
Linus Torvalds1da177e2005-04-16 15:20:36 -0700295 /* SRAT: Static Resource Affinity Table */
Len Brown7f8f97c2007-02-10 21:28:03 -0500296 if (!acpi_table_parse(ACPI_SIG_SRAT, acpi_parse_srat)) {
Suresh Siddha7237d3d2009-03-30 13:55:30 -0800297 acpi_table_parse_srat(ACPI_SRAT_TYPE_X2APIC_CPU_AFFINITY,
Yinghai Lu20e69262013-03-01 14:51:27 -0800298 acpi_parse_x2apic_affinity, 0);
David Rientjesae2c6dc2007-07-21 17:09:56 +0200299 acpi_table_parse_srat(ACPI_SRAT_TYPE_CPU_AFFINITY,
Yinghai Lu20e69262013-03-01 14:51:27 -0800300 acpi_parse_processor_affinity, 0);
301 cnt = acpi_table_parse_srat(ACPI_SRAT_TYPE_MEMORY_AFFINITY,
302 acpi_parse_memory_affinity,
303 NR_NODE_MEMBLKS);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700304 }
305
306 /* SLIT: System Locality Information Table */
Len Brown7f8f97c2007-02-10 21:28:03 -0500307 acpi_table_parse(ACPI_SIG_SLIT, acpi_parse_slit);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700308
309 acpi_numa_arch_fixup();
Tejun Heo940fed22011-02-16 12:13:06 +0100310
Yinghai Lu20e69262013-03-01 14:51:27 -0800311 if (cnt < 0)
312 return cnt;
Thomas Renninger095adbb2012-07-31 17:41:09 +0200313 else if (!parsed_numa_memblks)
Thomas Renningerf3946fb2012-07-31 17:41:08 +0200314 return -ENOENT;
Tejun Heo940fed22011-02-16 12:13:06 +0100315 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700316}
317
Yasunori Goto7e81ab92007-05-08 20:27:01 -0700318int acpi_get_pxm(acpi_handle h)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700319{
Matthew Wilcox27663c52008-10-10 02:22:59 -0400320 unsigned long long pxm;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700321 acpi_status status;
322 acpi_handle handle;
323 acpi_handle phandle = h;
324
325 do {
326 handle = phandle;
327 status = acpi_evaluate_integer(handle, "_PXM", NULL, &pxm);
328 if (ACPI_SUCCESS(status))
Jan Engelhardt50dd0962006-10-01 00:28:50 +0200329 return pxm;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700330 status = acpi_get_parent(handle, &phandle);
Len Brown4be44fc2005-08-05 00:44:28 -0400331 } while (ACPI_SUCCESS(status));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700332 return -1;
333}
Yasunori Goto1e3590e2006-06-27 02:53:31 -0700334
Yasunori Goto7e81ab92007-05-08 20:27:01 -0700335int acpi_get_node(acpi_handle *handle)
Yasunori Goto1e3590e2006-06-27 02:53:31 -0700336{
337 int pxm, node = -1;
338
Yasunori Goto1e3590e2006-06-27 02:53:31 -0700339 pxm = acpi_get_pxm(handle);
Cyrill Gorcunov27ce3412009-03-04 11:55:29 -0800340 if (pxm >= 0 && pxm < MAX_PXM_DOMAINS)
Yasunori Goto1e3590e2006-06-27 02:53:31 -0700341 node = acpi_map_pxm_to_node(pxm);
342
Len Brown635227e2006-07-01 16:48:23 -0400343 return node;
Yasunori Goto1e3590e2006-06-27 02:53:31 -0700344}
345EXPORT_SYMBOL(acpi_get_node);