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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
Len Browna192a952009-07-28 16:45:54 -040033#define PREFIX "ACPI: "
34
Linus Torvalds1da177e2005-04-16 15:20:36 -070035#define ACPI_NUMA 0x80000000
36#define _COMPONENT ACPI_NUMA
Len Brownf52fd662007-02-12 22:42:12 -050037ACPI_MODULE_NAME("numa");
Linus Torvalds1da177e2005-04-16 15:20:36 -070038
Yasunori Goto762834e2006-06-23 02:03:19 -070039static nodemask_t nodes_found_map = NODE_MASK_NONE;
Yasunori Goto762834e2006-06-23 02:03:19 -070040
41/* maps to convert between proximity domain and logical node ID */
Jan Beulichffada892007-12-13 08:32:26 +000042static int pxm_to_node_map[MAX_PXM_DOMAINS]
David Rientjesb552a8c2009-11-17 14:27:32 -080043 = { [0 ... MAX_PXM_DOMAINS - 1] = NUMA_NO_NODE };
Jan Beulichffada892007-12-13 08:32:26 +000044static int node_to_pxm_map[MAX_NUMNODES]
David Rientjesb552a8c2009-11-17 14:27:32 -080045 = { [0 ... MAX_NUMNODES - 1] = PXM_INVAL };
Yasunori Goto762834e2006-06-23 02:03:19 -070046
Kurt Garloff8df0eb7c2012-01-17 04:18:02 -050047unsigned char acpi_srat_revision __initdata;
48
Aaron Durbinf363d162007-05-16 22:11:06 -070049int pxm_to_node(int pxm)
Yasunori Goto762834e2006-06-23 02:03:19 -070050{
51 if (pxm < 0)
David Rientjesb552a8c2009-11-17 14:27:32 -080052 return NUMA_NO_NODE;
Yasunori Goto762834e2006-06-23 02:03:19 -070053 return pxm_to_node_map[pxm];
54}
55
Aaron Durbinf363d162007-05-16 22:11:06 -070056int node_to_pxm(int node)
Yasunori Goto762834e2006-06-23 02:03:19 -070057{
58 if (node < 0)
59 return PXM_INVAL;
60 return node_to_pxm_map[node];
61}
62
David Rientjes3484d792007-07-21 17:10:32 +020063void __acpi_map_pxm_to_node(int pxm, int node)
64{
David Rientjes0f9b75e2010-03-25 16:33:04 -070065 if (pxm_to_node_map[pxm] == NUMA_NO_NODE || node < pxm_to_node_map[pxm])
66 pxm_to_node_map[pxm] = node;
67 if (node_to_pxm_map[node] == PXM_INVAL || pxm < node_to_pxm_map[node])
68 node_to_pxm_map[node] = pxm;
David Rientjes3484d792007-07-21 17:10:32 +020069}
70
Luck, Tony8ff6f482007-05-24 13:57:40 -070071int acpi_map_pxm_to_node(int pxm)
Yasunori Goto762834e2006-06-23 02:03:19 -070072{
73 int node = pxm_to_node_map[pxm];
74
Jianguo Wu1bb25df2013-08-30 09:25:40 +080075 if (node == NUMA_NO_NODE) {
Yasunori Goto762834e2006-06-23 02:03:19 -070076 if (nodes_weight(nodes_found_map) >= MAX_NUMNODES)
David Rientjesb552a8c2009-11-17 14:27:32 -080077 return NUMA_NO_NODE;
Yasunori Goto762834e2006-06-23 02:03:19 -070078 node = first_unset_node(nodes_found_map);
David Rientjes3484d792007-07-21 17:10:32 +020079 __acpi_map_pxm_to_node(pxm, node);
Yasunori Goto762834e2006-06-23 02:03:19 -070080 node_set(node, nodes_found_map);
81 }
82
83 return node;
84}
85
David Rientjesae2c6dc2007-07-21 17:09:56 +020086static void __init
87acpi_table_print_srat_entry(struct acpi_subtable_header *header)
Linus Torvalds1da177e2005-04-16 15:20:36 -070088{
89
Len Brown4be44fc2005-08-05 00:44:28 -040090 ACPI_FUNCTION_NAME("acpi_table_print_srat_entry");
Linus Torvalds1da177e2005-04-16 15:20:36 -070091
92 if (!header)
93 return;
94
95 switch (header->type) {
96
Alexey Starikovskiy15a58ed2007-02-02 19:48:22 +030097 case ACPI_SRAT_TYPE_CPU_AFFINITY:
Linus Torvalds1da177e2005-04-16 15:20:36 -070098#ifdef ACPI_DEBUG_OUTPUT
Len Brown4be44fc2005-08-05 00:44:28 -040099 {
Alexey Starikovskiy15a58ed2007-02-02 19:48:22 +0300100 struct acpi_srat_cpu_affinity *p =
101 (struct acpi_srat_cpu_affinity *)header;
Len Brown4be44fc2005-08-05 00:44:28 -0400102 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
103 "SRAT Processor (id[0x%02x] eid[0x%02x]) in proximity domain %d %s\n",
Alexey Starikovskiy15a58ed2007-02-02 19:48:22 +0300104 p->apic_id, p->local_sapic_eid,
105 p->proximity_domain_lo,
106 (p->flags & ACPI_SRAT_CPU_ENABLED)?
107 "enabled" : "disabled"));
Len Brown4be44fc2005-08-05 00:44:28 -0400108 }
109#endif /* ACPI_DEBUG_OUTPUT */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700110 break;
111
Alexey Starikovskiy15a58ed2007-02-02 19:48:22 +0300112 case ACPI_SRAT_TYPE_MEMORY_AFFINITY:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700113#ifdef ACPI_DEBUG_OUTPUT
Len Brown4be44fc2005-08-05 00:44:28 -0400114 {
Alexey Starikovskiy15a58ed2007-02-02 19:48:22 +0300115 struct acpi_srat_mem_affinity *p =
116 (struct acpi_srat_mem_affinity *)header;
Len Brown4be44fc2005-08-05 00:44:28 -0400117 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
Davidlohr Bueso208f6cc2013-01-09 22:06:08 +0000118 "SRAT Memory (0x%lx length 0x%lx) in proximity domain %d %s%s%s\n",
Alexey Starikovskiy15a58ed2007-02-02 19:48:22 +0300119 (unsigned long)p->base_address,
120 (unsigned long)p->length,
Bob Moore19d0cfe2008-06-10 15:54:40 +0800121 p->proximity_domain,
Alexey Starikovskiy15a58ed2007-02-02 19:48:22 +0300122 (p->flags & ACPI_SRAT_MEM_ENABLED)?
123 "enabled" : "disabled",
124 (p->flags & ACPI_SRAT_MEM_HOT_PLUGGABLE)?
Davidlohr Bueso208f6cc2013-01-09 22:06:08 +0000125 " hot-pluggable" : "",
126 (p->flags & ACPI_SRAT_MEM_NON_VOLATILE)?
127 " non-volatile" : ""));
Len Brown4be44fc2005-08-05 00:44:28 -0400128 }
129#endif /* ACPI_DEBUG_OUTPUT */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700130 break;
131
Suresh Siddha7237d3d2009-03-30 13:55:30 -0800132 case ACPI_SRAT_TYPE_X2APIC_CPU_AFFINITY:
133#ifdef ACPI_DEBUG_OUTPUT
134 {
135 struct acpi_srat_x2apic_cpu_affinity *p =
136 (struct acpi_srat_x2apic_cpu_affinity *)header;
137 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
138 "SRAT Processor (x2apicid[0x%08x]) in"
139 " proximity domain %d %s\n",
140 p->apic_id,
141 p->proximity_domain,
142 (p->flags & ACPI_SRAT_CPU_ENABLED) ?
143 "enabled" : "disabled"));
144 }
145#endif /* ACPI_DEBUG_OUTPUT */
146 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700147 default:
Len Brown4be44fc2005-08-05 00:44:28 -0400148 printk(KERN_WARNING PREFIX
149 "Found unsupported SRAT entry (type = 0x%x)\n",
150 header->type);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700151 break;
152 }
153}
154
Fenghua Yu39b89312008-06-09 16:48:18 -0700155/*
156 * A lot of BIOS fill in 10 (= no distance) everywhere. This messes
157 * up the NUMA heuristics which wants the local node to have a smaller
158 * distance than the others.
159 * Do some quick checks here and only use the SLIT if it passes.
160 */
Hanjun Guo40e31852013-08-13 18:31:14 +0800161static int __init slit_valid(struct acpi_table_slit *slit)
Fenghua Yu39b89312008-06-09 16:48:18 -0700162{
163 int i, j;
164 int d = slit->locality_count;
165 for (i = 0; i < d; i++) {
166 for (j = 0; j < d; j++) {
167 u8 val = slit->entry[d*i + j];
168 if (i == j) {
169 if (val != LOCAL_DISTANCE)
170 return 0;
171 } else if (val <= LOCAL_DISTANCE)
172 return 0;
173 }
174 }
175 return 1;
176}
177
Alexey Starikovskiy15a58ed2007-02-02 19:48:22 +0300178static int __init acpi_parse_slit(struct acpi_table_header *table)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700179{
Len Brown4be44fc2005-08-05 00:44:28 -0400180 struct acpi_table_slit *slit;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700181
Alexey Starikovskiy15a58ed2007-02-02 19:48:22 +0300182 if (!table)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700183 return -EINVAL;
184
Alexey Starikovskiy15a58ed2007-02-02 19:48:22 +0300185 slit = (struct acpi_table_slit *)table;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700186
Fenghua Yu39b89312008-06-09 16:48:18 -0700187 if (!slit_valid(slit)) {
188 printk(KERN_INFO "ACPI: SLIT table looks invalid. Not used.\n");
189 return -EINVAL;
190 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700191 acpi_numa_slit_init(slit);
192
193 return 0;
194}
195
Suresh Siddha7237d3d2009-03-30 13:55:30 -0800196void __init __attribute__ ((weak))
197acpi_numa_x2apic_affinity_init(struct acpi_srat_x2apic_cpu_affinity *pa)
198{
199 printk(KERN_WARNING PREFIX
200 "Found unsupported x2apic [0x%08x] SRAT entry\n", pa->apic_id);
201 return;
202}
203
204
Linus Torvalds1da177e2005-04-16 15:20:36 -0700205static int __init
Suresh Siddha7237d3d2009-03-30 13:55:30 -0800206acpi_parse_x2apic_affinity(struct acpi_subtable_header *header,
207 const unsigned long end)
208{
209 struct acpi_srat_x2apic_cpu_affinity *processor_affinity;
210
211 processor_affinity = (struct acpi_srat_x2apic_cpu_affinity *)header;
212 if (!processor_affinity)
213 return -EINVAL;
214
215 acpi_table_print_srat_entry(header);
216
217 /* let architecture-dependent part to do it */
218 acpi_numa_x2apic_affinity_init(processor_affinity);
219
220 return 0;
221}
222
223static int __init
224acpi_parse_processor_affinity(struct acpi_subtable_header *header,
Len Brown4be44fc2005-08-05 00:44:28 -0400225 const unsigned long end)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700226{
Alexey Starikovskiy15a58ed2007-02-02 19:48:22 +0300227 struct acpi_srat_cpu_affinity *processor_affinity;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700228
Alexey Starikovskiy15a58ed2007-02-02 19:48:22 +0300229 processor_affinity = (struct acpi_srat_cpu_affinity *)header;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700230 if (!processor_affinity)
231 return -EINVAL;
232
233 acpi_table_print_srat_entry(header);
234
235 /* let architecture-dependent part to do it */
236 acpi_numa_processor_affinity_init(processor_affinity);
237
238 return 0;
239}
240
Thomas Renninger095adbb2012-07-31 17:41:09 +0200241static int __initdata parsed_numa_memblks;
242
Linus Torvalds1da177e2005-04-16 15:20:36 -0700243static int __init
Alexey Starikovskiy15a58ed2007-02-02 19:48:22 +0300244acpi_parse_memory_affinity(struct acpi_subtable_header * header,
Len Brown4be44fc2005-08-05 00:44:28 -0400245 const unsigned long end)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700246{
Alexey Starikovskiy15a58ed2007-02-02 19:48:22 +0300247 struct acpi_srat_mem_affinity *memory_affinity;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700248
Alexey Starikovskiy15a58ed2007-02-02 19:48:22 +0300249 memory_affinity = (struct acpi_srat_mem_affinity *)header;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700250 if (!memory_affinity)
251 return -EINVAL;
252
253 acpi_table_print_srat_entry(header);
254
255 /* let architecture-dependent part to do it */
Thomas Renninger095adbb2012-07-31 17:41:09 +0200256 if (!acpi_numa_memory_affinity_init(memory_affinity))
257 parsed_numa_memblks++;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700258 return 0;
259}
260
Alexey Starikovskiy15a58ed2007-02-02 19:48:22 +0300261static int __init acpi_parse_srat(struct acpi_table_header *table)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700262{
Kurt Garloff8df0eb7c2012-01-17 04:18:02 -0500263 struct acpi_table_srat *srat;
Alexey Starikovskiy15a58ed2007-02-02 19:48:22 +0300264 if (!table)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700265 return -EINVAL;
266
Kurt Garloff8df0eb7c2012-01-17 04:18:02 -0500267 srat = (struct acpi_table_srat *)table;
268 acpi_srat_revision = srat->header.revision;
269
Andi Kleencfa806f2010-07-20 15:18:36 -0700270 /* Real work done in acpi_table_parse_srat below. */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700271
272 return 0;
273}
274
David Rientjesae2c6dc2007-07-21 17:09:56 +0200275static int __init
Alexey Starikovskiy15a58ed2007-02-02 19:48:22 +0300276acpi_table_parse_srat(enum acpi_srat_type id,
Lv Zhengb43e1062013-01-12 15:29:38 +0000277 acpi_tbl_entry_handler handler, unsigned int max_entries)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700278{
Len Brown6eb87fe2007-02-10 22:17:07 -0500279 return acpi_table_parse_entries(ACPI_SIG_SRAT,
Len Brown4be44fc2005-08-05 00:44:28 -0400280 sizeof(struct acpi_table_srat), id,
281 handler, max_entries);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700282}
283
Yinghai Lu20e69262013-03-01 14:51:27 -0800284int __init acpi_numa_init(void)
Tang Chene8d19552013-02-22 16:33:44 -0800285{
Yinghai Lu20e69262013-03-01 14:51:27 -0800286 int cnt = 0;
287
Yinghai Lud3bd0582010-12-16 19:09:58 -0800288 /*
289 * Should not limit number with cpu num that is from NR_CPUS or nr_cpus=
290 * SRAT cpu entries could have different order with that in MADT.
291 * So go over all cpu entries in SRAT to get apicid to node mapping.
292 */
David Rientjes87162732009-09-25 15:20:04 -0700293
Linus Torvalds1da177e2005-04-16 15:20:36 -0700294 /* SRAT: Static Resource Affinity Table */
Len Brown7f8f97c2007-02-10 21:28:03 -0500295 if (!acpi_table_parse(ACPI_SIG_SRAT, acpi_parse_srat)) {
Suresh Siddha7237d3d2009-03-30 13:55:30 -0800296 acpi_table_parse_srat(ACPI_SRAT_TYPE_X2APIC_CPU_AFFINITY,
Yinghai Lu20e69262013-03-01 14:51:27 -0800297 acpi_parse_x2apic_affinity, 0);
David Rientjesae2c6dc2007-07-21 17:09:56 +0200298 acpi_table_parse_srat(ACPI_SRAT_TYPE_CPU_AFFINITY,
Yinghai Lu20e69262013-03-01 14:51:27 -0800299 acpi_parse_processor_affinity, 0);
300 cnt = acpi_table_parse_srat(ACPI_SRAT_TYPE_MEMORY_AFFINITY,
301 acpi_parse_memory_affinity,
302 NR_NODE_MEMBLKS);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700303 }
304
305 /* SLIT: System Locality Information Table */
Len Brown7f8f97c2007-02-10 21:28:03 -0500306 acpi_table_parse(ACPI_SIG_SLIT, acpi_parse_slit);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700307
308 acpi_numa_arch_fixup();
Tejun Heo940fed22011-02-16 12:13:06 +0100309
Yinghai Lu20e69262013-03-01 14:51:27 -0800310 if (cnt < 0)
311 return cnt;
Thomas Renninger095adbb2012-07-31 17:41:09 +0200312 else if (!parsed_numa_memblks)
Thomas Renningerf3946fb2012-07-31 17:41:08 +0200313 return -ENOENT;
Tejun Heo940fed22011-02-16 12:13:06 +0100314 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700315}
316
Yasunori Goto7e81ab92007-05-08 20:27:01 -0700317int acpi_get_pxm(acpi_handle h)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700318{
Matthew Wilcox27663c52008-10-10 02:22:59 -0400319 unsigned long long pxm;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700320 acpi_status status;
321 acpi_handle handle;
322 acpi_handle phandle = h;
323
324 do {
325 handle = phandle;
326 status = acpi_evaluate_integer(handle, "_PXM", NULL, &pxm);
327 if (ACPI_SUCCESS(status))
Jan Engelhardt50dd0962006-10-01 00:28:50 +0200328 return pxm;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700329 status = acpi_get_parent(handle, &phandle);
Len Brown4be44fc2005-08-05 00:44:28 -0400330 } while (ACPI_SUCCESS(status));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700331 return -1;
332}
Yasunori Goto1e3590e2006-06-27 02:53:31 -0700333
Yasunori Goto7e81ab92007-05-08 20:27:01 -0700334int acpi_get_node(acpi_handle *handle)
Yasunori Goto1e3590e2006-06-27 02:53:31 -0700335{
Jianguo Wu1bb25df2013-08-30 09:25:40 +0800336 int pxm, node = NUMA_NO_NODE;
Yasunori Goto1e3590e2006-06-27 02:53:31 -0700337
Yasunori Goto1e3590e2006-06-27 02:53:31 -0700338 pxm = acpi_get_pxm(handle);
Cyrill Gorcunov27ce3412009-03-04 11:55:29 -0800339 if (pxm >= 0 && pxm < MAX_PXM_DOMAINS)
Yasunori Goto1e3590e2006-06-27 02:53:31 -0700340 node = acpi_map_pxm_to_node(pxm);
341
Len Brown635227e2006-07-01 16:48:23 -0400342 return node;
Yasunori Goto1e3590e2006-06-27 02:53:31 -0700343}
344EXPORT_SYMBOL(acpi_get_node);