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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>
Linus Torvalds1da177e2005-04-16 15:20:36 -070032
33#define ACPI_NUMA 0x80000000
34#define _COMPONENT ACPI_NUMA
Len Brownf52fd662007-02-12 22:42:12 -050035ACPI_MODULE_NAME("numa");
Linus Torvalds1da177e2005-04-16 15:20:36 -070036
Yasunori Goto762834e2006-06-23 02:03:19 -070037static nodemask_t nodes_found_map = NODE_MASK_NONE;
Yasunori Goto762834e2006-06-23 02:03:19 -070038
39/* maps to convert between proximity domain and logical node ID */
Jan Beulichffada892007-12-13 08:32:26 +000040static int pxm_to_node_map[MAX_PXM_DOMAINS]
Yasunori Goto762834e2006-06-23 02:03:19 -070041 = { [0 ... MAX_PXM_DOMAINS - 1] = NID_INVAL };
Jan Beulichffada892007-12-13 08:32:26 +000042static int node_to_pxm_map[MAX_NUMNODES]
Yasunori Goto762834e2006-06-23 02:03:19 -070043 = { [0 ... MAX_NUMNODES - 1] = PXM_INVAL };
44
Aaron Durbinf363d162007-05-16 22:11:06 -070045int pxm_to_node(int pxm)
Yasunori Goto762834e2006-06-23 02:03:19 -070046{
47 if (pxm < 0)
48 return NID_INVAL;
49 return pxm_to_node_map[pxm];
50}
51
Aaron Durbinf363d162007-05-16 22:11:06 -070052int node_to_pxm(int node)
Yasunori Goto762834e2006-06-23 02:03:19 -070053{
54 if (node < 0)
55 return PXM_INVAL;
56 return node_to_pxm_map[node];
57}
58
David Rientjes3484d792007-07-21 17:10:32 +020059void __acpi_map_pxm_to_node(int pxm, int node)
60{
61 pxm_to_node_map[pxm] = node;
62 node_to_pxm_map[node] = pxm;
63}
64
Luck, Tony8ff6f482007-05-24 13:57:40 -070065int acpi_map_pxm_to_node(int pxm)
Yasunori Goto762834e2006-06-23 02:03:19 -070066{
67 int node = pxm_to_node_map[pxm];
68
69 if (node < 0){
70 if (nodes_weight(nodes_found_map) >= MAX_NUMNODES)
71 return NID_INVAL;
72 node = first_unset_node(nodes_found_map);
David Rientjes3484d792007-07-21 17:10:32 +020073 __acpi_map_pxm_to_node(pxm, node);
Yasunori Goto762834e2006-06-23 02:03:19 -070074 node_set(node, nodes_found_map);
75 }
76
77 return node;
78}
79
Adrian Bunke5685b92007-10-24 18:24:42 +020080#if 0
Yasunori Goto762834e2006-06-23 02:03:19 -070081void __cpuinit acpi_unmap_pxm_to_node(int node)
82{
83 int pxm = node_to_pxm_map[node];
84 pxm_to_node_map[pxm] = NID_INVAL;
85 node_to_pxm_map[node] = PXM_INVAL;
86 node_clear(node, nodes_found_map);
87}
Adrian Bunke5685b92007-10-24 18:24:42 +020088#endif /* 0 */
Yasunori Goto762834e2006-06-23 02:03:19 -070089
David Rientjesae2c6dc2007-07-21 17:09:56 +020090static void __init
91acpi_table_print_srat_entry(struct acpi_subtable_header *header)
Linus Torvalds1da177e2005-04-16 15:20:36 -070092{
93
Len Brown4be44fc2005-08-05 00:44:28 -040094 ACPI_FUNCTION_NAME("acpi_table_print_srat_entry");
Linus Torvalds1da177e2005-04-16 15:20:36 -070095
96 if (!header)
97 return;
98
99 switch (header->type) {
100
Alexey Starikovskiy15a58ed2007-02-02 19:48:22 +0300101 case ACPI_SRAT_TYPE_CPU_AFFINITY:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700102#ifdef ACPI_DEBUG_OUTPUT
Len Brown4be44fc2005-08-05 00:44:28 -0400103 {
Alexey Starikovskiy15a58ed2007-02-02 19:48:22 +0300104 struct acpi_srat_cpu_affinity *p =
105 (struct acpi_srat_cpu_affinity *)header;
Len Brown4be44fc2005-08-05 00:44:28 -0400106 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
107 "SRAT Processor (id[0x%02x] eid[0x%02x]) in proximity domain %d %s\n",
Alexey Starikovskiy15a58ed2007-02-02 19:48:22 +0300108 p->apic_id, p->local_sapic_eid,
109 p->proximity_domain_lo,
110 (p->flags & ACPI_SRAT_CPU_ENABLED)?
111 "enabled" : "disabled"));
Len Brown4be44fc2005-08-05 00:44:28 -0400112 }
113#endif /* ACPI_DEBUG_OUTPUT */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700114 break;
115
Alexey Starikovskiy15a58ed2007-02-02 19:48:22 +0300116 case ACPI_SRAT_TYPE_MEMORY_AFFINITY:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700117#ifdef ACPI_DEBUG_OUTPUT
Len Brown4be44fc2005-08-05 00:44:28 -0400118 {
Alexey Starikovskiy15a58ed2007-02-02 19:48:22 +0300119 struct acpi_srat_mem_affinity *p =
120 (struct acpi_srat_mem_affinity *)header;
Len Brown4be44fc2005-08-05 00:44:28 -0400121 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
Bob Moore19d0cfe2008-06-10 15:54:40 +0800122 "SRAT Memory (0x%lx length 0x%lx) in proximity domain %d %s%s\n",
Alexey Starikovskiy15a58ed2007-02-02 19:48:22 +0300123 (unsigned long)p->base_address,
124 (unsigned long)p->length,
Bob Moore19d0cfe2008-06-10 15:54:40 +0800125 p->proximity_domain,
Alexey Starikovskiy15a58ed2007-02-02 19:48:22 +0300126 (p->flags & ACPI_SRAT_MEM_ENABLED)?
127 "enabled" : "disabled",
128 (p->flags & ACPI_SRAT_MEM_HOT_PLUGGABLE)?
129 " hot-pluggable" : ""));
Len Brown4be44fc2005-08-05 00:44:28 -0400130 }
131#endif /* ACPI_DEBUG_OUTPUT */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700132 break;
133
134 default:
Len Brown4be44fc2005-08-05 00:44:28 -0400135 printk(KERN_WARNING PREFIX
136 "Found unsupported SRAT entry (type = 0x%x)\n",
137 header->type);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700138 break;
139 }
140}
141
Fenghua Yu39b89312008-06-09 16:48:18 -0700142/*
143 * A lot of BIOS fill in 10 (= no distance) everywhere. This messes
144 * up the NUMA heuristics which wants the local node to have a smaller
145 * distance than the others.
146 * Do some quick checks here and only use the SLIT if it passes.
147 */
148static __init int slit_valid(struct acpi_table_slit *slit)
149{
150 int i, j;
151 int d = slit->locality_count;
152 for (i = 0; i < d; i++) {
153 for (j = 0; j < d; j++) {
154 u8 val = slit->entry[d*i + j];
155 if (i == j) {
156 if (val != LOCAL_DISTANCE)
157 return 0;
158 } else if (val <= LOCAL_DISTANCE)
159 return 0;
160 }
161 }
162 return 1;
163}
164
Alexey Starikovskiy15a58ed2007-02-02 19:48:22 +0300165static int __init acpi_parse_slit(struct acpi_table_header *table)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700166{
Len Brown4be44fc2005-08-05 00:44:28 -0400167 struct acpi_table_slit *slit;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700168
Alexey Starikovskiy15a58ed2007-02-02 19:48:22 +0300169 if (!table)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700170 return -EINVAL;
171
Alexey Starikovskiy15a58ed2007-02-02 19:48:22 +0300172 slit = (struct acpi_table_slit *)table;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700173
Fenghua Yu39b89312008-06-09 16:48:18 -0700174 if (!slit_valid(slit)) {
175 printk(KERN_INFO "ACPI: SLIT table looks invalid. Not used.\n");
176 return -EINVAL;
177 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700178 acpi_numa_slit_init(slit);
179
180 return 0;
181}
182
Linus Torvalds1da177e2005-04-16 15:20:36 -0700183static int __init
Alexey Starikovskiy15a58ed2007-02-02 19:48:22 +0300184acpi_parse_processor_affinity(struct acpi_subtable_header * header,
Len Brown4be44fc2005-08-05 00:44:28 -0400185 const unsigned long end)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700186{
Alexey Starikovskiy15a58ed2007-02-02 19:48:22 +0300187 struct acpi_srat_cpu_affinity *processor_affinity;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700188
Alexey Starikovskiy15a58ed2007-02-02 19:48:22 +0300189 processor_affinity = (struct acpi_srat_cpu_affinity *)header;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700190 if (!processor_affinity)
191 return -EINVAL;
192
193 acpi_table_print_srat_entry(header);
194
195 /* let architecture-dependent part to do it */
196 acpi_numa_processor_affinity_init(processor_affinity);
197
198 return 0;
199}
200
Linus Torvalds1da177e2005-04-16 15:20:36 -0700201static int __init
Alexey Starikovskiy15a58ed2007-02-02 19:48:22 +0300202acpi_parse_memory_affinity(struct acpi_subtable_header * header,
Len Brown4be44fc2005-08-05 00:44:28 -0400203 const unsigned long end)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700204{
Alexey Starikovskiy15a58ed2007-02-02 19:48:22 +0300205 struct acpi_srat_mem_affinity *memory_affinity;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700206
Alexey Starikovskiy15a58ed2007-02-02 19:48:22 +0300207 memory_affinity = (struct acpi_srat_mem_affinity *)header;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700208 if (!memory_affinity)
209 return -EINVAL;
210
211 acpi_table_print_srat_entry(header);
212
213 /* let architecture-dependent part to do it */
214 acpi_numa_memory_affinity_init(memory_affinity);
215
216 return 0;
217}
218
Alexey Starikovskiy15a58ed2007-02-02 19:48:22 +0300219static int __init acpi_parse_srat(struct acpi_table_header *table)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700220{
Len Brown4be44fc2005-08-05 00:44:28 -0400221 struct acpi_table_srat *srat;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700222
Alexey Starikovskiy15a58ed2007-02-02 19:48:22 +0300223 if (!table)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700224 return -EINVAL;
225
Alexey Starikovskiy15a58ed2007-02-02 19:48:22 +0300226 srat = (struct acpi_table_srat *)table;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700227
228 return 0;
229}
230
David Rientjesae2c6dc2007-07-21 17:09:56 +0200231static int __init
Alexey Starikovskiy15a58ed2007-02-02 19:48:22 +0300232acpi_table_parse_srat(enum acpi_srat_type id,
Len Brown5a8765a2007-02-10 21:35:47 -0500233 acpi_table_entry_handler handler, unsigned int max_entries)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700234{
Len Brown6eb87fe2007-02-10 22:17:07 -0500235 return acpi_table_parse_entries(ACPI_SIG_SRAT,
Len Brown4be44fc2005-08-05 00:44:28 -0400236 sizeof(struct acpi_table_srat), id,
237 handler, max_entries);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700238}
239
Len Brown4be44fc2005-08-05 00:44:28 -0400240int __init acpi_numa_init(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700241{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700242 /* SRAT: Static Resource Affinity Table */
Len Brown7f8f97c2007-02-10 21:28:03 -0500243 if (!acpi_table_parse(ACPI_SIG_SRAT, acpi_parse_srat)) {
David Rientjesae2c6dc2007-07-21 17:09:56 +0200244 acpi_table_parse_srat(ACPI_SRAT_TYPE_CPU_AFFINITY,
245 acpi_parse_processor_affinity, NR_CPUS);
246 acpi_table_parse_srat(ACPI_SRAT_TYPE_MEMORY_AFFINITY,
247 acpi_parse_memory_affinity,
248 NR_NODE_MEMBLKS);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700249 }
250
251 /* SLIT: System Locality Information Table */
Len Brown7f8f97c2007-02-10 21:28:03 -0500252 acpi_table_parse(ACPI_SIG_SLIT, acpi_parse_slit);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700253
254 acpi_numa_arch_fixup();
255 return 0;
256}
257
Yasunori Goto7e81ab92007-05-08 20:27:01 -0700258int acpi_get_pxm(acpi_handle h)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700259{
Matthew Wilcox27663c52008-10-10 02:22:59 -0400260 unsigned long long pxm;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700261 acpi_status status;
262 acpi_handle handle;
263 acpi_handle phandle = h;
264
265 do {
266 handle = phandle;
267 status = acpi_evaluate_integer(handle, "_PXM", NULL, &pxm);
268 if (ACPI_SUCCESS(status))
Jan Engelhardt50dd0962006-10-01 00:28:50 +0200269 return pxm;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700270 status = acpi_get_parent(handle, &phandle);
Len Brown4be44fc2005-08-05 00:44:28 -0400271 } while (ACPI_SUCCESS(status));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700272 return -1;
273}
Yasunori Goto1e3590e2006-06-27 02:53:31 -0700274
Yasunori Goto7e81ab92007-05-08 20:27:01 -0700275int acpi_get_node(acpi_handle *handle)
Yasunori Goto1e3590e2006-06-27 02:53:31 -0700276{
277 int pxm, node = -1;
278
Yasunori Goto1e3590e2006-06-27 02:53:31 -0700279 pxm = acpi_get_pxm(handle);
280 if (pxm >= 0)
281 node = acpi_map_pxm_to_node(pxm);
282
Len Brown635227e2006-07-01 16:48:23 -0400283 return node;
Yasunori Goto1e3590e2006-06-27 02:53:31 -0700284}
285EXPORT_SYMBOL(acpi_get_node);