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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,
Bob Moore19d0cfe2008-06-10 15:54:40 +0800119 "SRAT Memory (0x%lx length 0x%lx) in proximity domain %d %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)?
126 " hot-pluggable" : ""));
Len Brown4be44fc2005-08-05 00:44:28 -0400127 }
128#endif /* ACPI_DEBUG_OUTPUT */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700129 break;
130
Suresh Siddha7237d3d2009-03-30 13:55:30 -0800131 case ACPI_SRAT_TYPE_X2APIC_CPU_AFFINITY:
132#ifdef ACPI_DEBUG_OUTPUT
133 {
134 struct acpi_srat_x2apic_cpu_affinity *p =
135 (struct acpi_srat_x2apic_cpu_affinity *)header;
136 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
137 "SRAT Processor (x2apicid[0x%08x]) in"
138 " proximity domain %d %s\n",
139 p->apic_id,
140 p->proximity_domain,
141 (p->flags & ACPI_SRAT_CPU_ENABLED) ?
142 "enabled" : "disabled"));
143 }
144#endif /* ACPI_DEBUG_OUTPUT */
145 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700146 default:
Len Brown4be44fc2005-08-05 00:44:28 -0400147 printk(KERN_WARNING PREFIX
148 "Found unsupported SRAT entry (type = 0x%x)\n",
149 header->type);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700150 break;
151 }
152}
153
Fenghua Yu39b89312008-06-09 16:48:18 -0700154/*
155 * A lot of BIOS fill in 10 (= no distance) everywhere. This messes
156 * up the NUMA heuristics which wants the local node to have a smaller
157 * distance than the others.
158 * Do some quick checks here and only use the SLIT if it passes.
159 */
160static __init int slit_valid(struct acpi_table_slit *slit)
161{
162 int i, j;
163 int d = slit->locality_count;
164 for (i = 0; i < d; i++) {
165 for (j = 0; j < d; j++) {
166 u8 val = slit->entry[d*i + j];
167 if (i == j) {
168 if (val != LOCAL_DISTANCE)
169 return 0;
170 } else if (val <= LOCAL_DISTANCE)
171 return 0;
172 }
173 }
174 return 1;
175}
176
Alexey Starikovskiy15a58ed2007-02-02 19:48:22 +0300177static int __init acpi_parse_slit(struct acpi_table_header *table)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700178{
Len Brown4be44fc2005-08-05 00:44:28 -0400179 struct acpi_table_slit *slit;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700180
Alexey Starikovskiy15a58ed2007-02-02 19:48:22 +0300181 if (!table)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700182 return -EINVAL;
183
Alexey Starikovskiy15a58ed2007-02-02 19:48:22 +0300184 slit = (struct acpi_table_slit *)table;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700185
Fenghua Yu39b89312008-06-09 16:48:18 -0700186 if (!slit_valid(slit)) {
187 printk(KERN_INFO "ACPI: SLIT table looks invalid. Not used.\n");
188 return -EINVAL;
189 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700190 acpi_numa_slit_init(slit);
191
192 return 0;
193}
194
Suresh Siddha7237d3d2009-03-30 13:55:30 -0800195void __init __attribute__ ((weak))
196acpi_numa_x2apic_affinity_init(struct acpi_srat_x2apic_cpu_affinity *pa)
197{
198 printk(KERN_WARNING PREFIX
199 "Found unsupported x2apic [0x%08x] SRAT entry\n", pa->apic_id);
200 return;
201}
202
203
Linus Torvalds1da177e2005-04-16 15:20:36 -0700204static int __init
Suresh Siddha7237d3d2009-03-30 13:55:30 -0800205acpi_parse_x2apic_affinity(struct acpi_subtable_header *header,
206 const unsigned long end)
207{
208 struct acpi_srat_x2apic_cpu_affinity *processor_affinity;
209
210 processor_affinity = (struct acpi_srat_x2apic_cpu_affinity *)header;
211 if (!processor_affinity)
212 return -EINVAL;
213
214 acpi_table_print_srat_entry(header);
215
216 /* let architecture-dependent part to do it */
217 acpi_numa_x2apic_affinity_init(processor_affinity);
218
219 return 0;
220}
221
222static int __init
223acpi_parse_processor_affinity(struct acpi_subtable_header *header,
Len Brown4be44fc2005-08-05 00:44:28 -0400224 const unsigned long end)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700225{
Alexey Starikovskiy15a58ed2007-02-02 19:48:22 +0300226 struct acpi_srat_cpu_affinity *processor_affinity;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700227
Alexey Starikovskiy15a58ed2007-02-02 19:48:22 +0300228 processor_affinity = (struct acpi_srat_cpu_affinity *)header;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700229 if (!processor_affinity)
230 return -EINVAL;
231
232 acpi_table_print_srat_entry(header);
233
234 /* let architecture-dependent part to do it */
235 acpi_numa_processor_affinity_init(processor_affinity);
236
237 return 0;
238}
239
Linus Torvalds1da177e2005-04-16 15:20:36 -0700240static int __init
Alexey Starikovskiy15a58ed2007-02-02 19:48:22 +0300241acpi_parse_memory_affinity(struct acpi_subtable_header * header,
Len Brown4be44fc2005-08-05 00:44:28 -0400242 const unsigned long end)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700243{
Alexey Starikovskiy15a58ed2007-02-02 19:48:22 +0300244 struct acpi_srat_mem_affinity *memory_affinity;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700245
Alexey Starikovskiy15a58ed2007-02-02 19:48:22 +0300246 memory_affinity = (struct acpi_srat_mem_affinity *)header;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700247 if (!memory_affinity)
248 return -EINVAL;
249
250 acpi_table_print_srat_entry(header);
251
252 /* let architecture-dependent part to do it */
253 acpi_numa_memory_affinity_init(memory_affinity);
254
255 return 0;
256}
257
Alexey Starikovskiy15a58ed2007-02-02 19:48:22 +0300258static int __init acpi_parse_srat(struct acpi_table_header *table)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700259{
Kurt Garloff8df0eb7c2012-01-17 04:18:02 -0500260 struct acpi_table_srat *srat;
Alexey Starikovskiy15a58ed2007-02-02 19:48:22 +0300261 if (!table)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700262 return -EINVAL;
263
Kurt Garloff8df0eb7c2012-01-17 04:18:02 -0500264 srat = (struct acpi_table_srat *)table;
265 acpi_srat_revision = srat->header.revision;
266
Andi Kleencfa806f2010-07-20 15:18:36 -0700267 /* Real work done in acpi_table_parse_srat below. */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700268
269 return 0;
270}
271
David Rientjesae2c6dc2007-07-21 17:09:56 +0200272static int __init
Alexey Starikovskiy15a58ed2007-02-02 19:48:22 +0300273acpi_table_parse_srat(enum acpi_srat_type id,
Len Brown5a8765a2007-02-10 21:35:47 -0500274 acpi_table_entry_handler handler, unsigned int max_entries)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700275{
Len Brown6eb87fe2007-02-10 22:17:07 -0500276 return acpi_table_parse_entries(ACPI_SIG_SRAT,
Len Brown4be44fc2005-08-05 00:44:28 -0400277 sizeof(struct acpi_table_srat), id,
278 handler, max_entries);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700279}
280
Len Brown4be44fc2005-08-05 00:44:28 -0400281int __init acpi_numa_init(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700282{
Tejun Heo940fed22011-02-16 12:13:06 +0100283 int cnt = 0;
Yinghai Lud3bd0582010-12-16 19:09:58 -0800284
Yinghai Lud3bd0582010-12-16 19:09:58 -0800285 /*
286 * Should not limit number with cpu num that is from NR_CPUS or nr_cpus=
287 * SRAT cpu entries could have different order with that in MADT.
288 * So go over all cpu entries in SRAT to get apicid to node mapping.
289 */
David Rientjes87162732009-09-25 15:20:04 -0700290
Linus Torvalds1da177e2005-04-16 15:20:36 -0700291 /* SRAT: Static Resource Affinity Table */
Len Brown7f8f97c2007-02-10 21:28:03 -0500292 if (!acpi_table_parse(ACPI_SIG_SRAT, acpi_parse_srat)) {
Suresh Siddha7237d3d2009-03-30 13:55:30 -0800293 acpi_table_parse_srat(ACPI_SRAT_TYPE_X2APIC_CPU_AFFINITY,
Tony Luck9378b632011-01-12 00:50:37 -0800294 acpi_parse_x2apic_affinity, 0);
David Rientjesae2c6dc2007-07-21 17:09:56 +0200295 acpi_table_parse_srat(ACPI_SRAT_TYPE_CPU_AFFINITY,
Tony Luck9378b632011-01-12 00:50:37 -0800296 acpi_parse_processor_affinity, 0);
Tejun Heo940fed22011-02-16 12:13:06 +0100297 cnt = acpi_table_parse_srat(ACPI_SRAT_TYPE_MEMORY_AFFINITY,
David Rientjes87162732009-09-25 15:20:04 -0700298 acpi_parse_memory_affinity,
299 NR_NODE_MEMBLKS);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700300 }
301
302 /* SLIT: System Locality Information Table */
Len Brown7f8f97c2007-02-10 21:28:03 -0500303 acpi_table_parse(ACPI_SIG_SLIT, acpi_parse_slit);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700304
305 acpi_numa_arch_fixup();
Tejun Heo940fed22011-02-16 12:13:06 +0100306
307 if (cnt <= 0)
308 return cnt ?: -ENOENT;
309 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700310}
311
Yasunori Goto7e81ab92007-05-08 20:27:01 -0700312int acpi_get_pxm(acpi_handle h)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700313{
Matthew Wilcox27663c52008-10-10 02:22:59 -0400314 unsigned long long pxm;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700315 acpi_status status;
316 acpi_handle handle;
317 acpi_handle phandle = h;
318
319 do {
320 handle = phandle;
321 status = acpi_evaluate_integer(handle, "_PXM", NULL, &pxm);
322 if (ACPI_SUCCESS(status))
Jan Engelhardt50dd0962006-10-01 00:28:50 +0200323 return pxm;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700324 status = acpi_get_parent(handle, &phandle);
Len Brown4be44fc2005-08-05 00:44:28 -0400325 } while (ACPI_SUCCESS(status));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700326 return -1;
327}
Yasunori Goto1e3590e2006-06-27 02:53:31 -0700328
Yasunori Goto7e81ab92007-05-08 20:27:01 -0700329int acpi_get_node(acpi_handle *handle)
Yasunori Goto1e3590e2006-06-27 02:53:31 -0700330{
331 int pxm, node = -1;
332
Yasunori Goto1e3590e2006-06-27 02:53:31 -0700333 pxm = acpi_get_pxm(handle);
Cyrill Gorcunov27ce3412009-03-04 11:55:29 -0800334 if (pxm >= 0 && pxm < MAX_PXM_DOMAINS)
Yasunori Goto1e3590e2006-06-27 02:53:31 -0700335 node = acpi_map_pxm_to_node(pxm);
336
Len Brown635227e2006-07-01 16:48:23 -0400337 return node;
Yasunori Goto1e3590e2006-06-27 02:53:31 -0700338}
339EXPORT_SYMBOL(acpi_get_node);