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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>
32#include <acpi/acmacros.h>
33
34#define ACPI_NUMA 0x80000000
35#define _COMPONENT ACPI_NUMA
Len Brownf52fd662007-02-12 22:42:12 -050036ACPI_MODULE_NAME("numa");
Linus Torvalds1da177e2005-04-16 15:20:36 -070037
Yasunori Goto762834e2006-06-23 02:03:19 -070038static nodemask_t nodes_found_map = NODE_MASK_NONE;
Yasunori Goto762834e2006-06-23 02:03:19 -070039
40/* maps to convert between proximity domain and logical node ID */
Jan Beulichffada892007-12-13 08:32:26 +000041static int pxm_to_node_map[MAX_PXM_DOMAINS]
Yasunori Goto762834e2006-06-23 02:03:19 -070042 = { [0 ... MAX_PXM_DOMAINS - 1] = NID_INVAL };
Jan Beulichffada892007-12-13 08:32:26 +000043static int node_to_pxm_map[MAX_NUMNODES]
Yasunori Goto762834e2006-06-23 02:03:19 -070044 = { [0 ... MAX_NUMNODES - 1] = PXM_INVAL };
45
Aaron Durbinf363d162007-05-16 22:11:06 -070046int pxm_to_node(int pxm)
Yasunori Goto762834e2006-06-23 02:03:19 -070047{
48 if (pxm < 0)
49 return NID_INVAL;
50 return pxm_to_node_map[pxm];
51}
52
Aaron Durbinf363d162007-05-16 22:11:06 -070053int node_to_pxm(int node)
Yasunori Goto762834e2006-06-23 02:03:19 -070054{
55 if (node < 0)
56 return PXM_INVAL;
57 return node_to_pxm_map[node];
58}
59
David Rientjes3484d792007-07-21 17:10:32 +020060void __acpi_map_pxm_to_node(int pxm, int node)
61{
62 pxm_to_node_map[pxm] = node;
63 node_to_pxm_map[node] = pxm;
64}
65
Luck, Tony8ff6f482007-05-24 13:57:40 -070066int acpi_map_pxm_to_node(int pxm)
Yasunori Goto762834e2006-06-23 02:03:19 -070067{
68 int node = pxm_to_node_map[pxm];
69
70 if (node < 0){
71 if (nodes_weight(nodes_found_map) >= MAX_NUMNODES)
72 return NID_INVAL;
73 node = first_unset_node(nodes_found_map);
David Rientjes3484d792007-07-21 17:10:32 +020074 __acpi_map_pxm_to_node(pxm, node);
Yasunori Goto762834e2006-06-23 02:03:19 -070075 node_set(node, nodes_found_map);
76 }
77
78 return node;
79}
80
Adrian Bunke5685b92007-10-24 18:24:42 +020081#if 0
Yasunori Goto762834e2006-06-23 02:03:19 -070082void __cpuinit acpi_unmap_pxm_to_node(int node)
83{
84 int pxm = node_to_pxm_map[node];
85 pxm_to_node_map[pxm] = NID_INVAL;
86 node_to_pxm_map[node] = PXM_INVAL;
87 node_clear(node, nodes_found_map);
88}
Adrian Bunke5685b92007-10-24 18:24:42 +020089#endif /* 0 */
Yasunori Goto762834e2006-06-23 02:03:19 -070090
David Rientjesae2c6dc2007-07-21 17:09:56 +020091static void __init
92acpi_table_print_srat_entry(struct acpi_subtable_header *header)
Linus Torvalds1da177e2005-04-16 15:20:36 -070093{
94
Len Brown4be44fc2005-08-05 00:44:28 -040095 ACPI_FUNCTION_NAME("acpi_table_print_srat_entry");
Linus Torvalds1da177e2005-04-16 15:20:36 -070096
97 if (!header)
98 return;
99
100 switch (header->type) {
101
Alexey Starikovskiy15a58ed2007-02-02 19:48:22 +0300102 case ACPI_SRAT_TYPE_CPU_AFFINITY:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700103#ifdef ACPI_DEBUG_OUTPUT
Len Brown4be44fc2005-08-05 00:44:28 -0400104 {
Alexey Starikovskiy15a58ed2007-02-02 19:48:22 +0300105 struct acpi_srat_cpu_affinity *p =
106 (struct acpi_srat_cpu_affinity *)header;
Len Brown4be44fc2005-08-05 00:44:28 -0400107 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
108 "SRAT Processor (id[0x%02x] eid[0x%02x]) in proximity domain %d %s\n",
Alexey Starikovskiy15a58ed2007-02-02 19:48:22 +0300109 p->apic_id, p->local_sapic_eid,
110 p->proximity_domain_lo,
111 (p->flags & ACPI_SRAT_CPU_ENABLED)?
112 "enabled" : "disabled"));
Len Brown4be44fc2005-08-05 00:44:28 -0400113 }
114#endif /* ACPI_DEBUG_OUTPUT */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700115 break;
116
Alexey Starikovskiy15a58ed2007-02-02 19:48:22 +0300117 case ACPI_SRAT_TYPE_MEMORY_AFFINITY:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700118#ifdef ACPI_DEBUG_OUTPUT
Len Brown4be44fc2005-08-05 00:44:28 -0400119 {
Alexey Starikovskiy15a58ed2007-02-02 19:48:22 +0300120 struct acpi_srat_mem_affinity *p =
121 (struct acpi_srat_mem_affinity *)header;
Len Brown4be44fc2005-08-05 00:44:28 -0400122 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
Bob Moore19d0cfe2008-06-10 15:54:40 +0800123 "SRAT Memory (0x%lx length 0x%lx) in proximity domain %d %s%s\n",
Alexey Starikovskiy15a58ed2007-02-02 19:48:22 +0300124 (unsigned long)p->base_address,
125 (unsigned long)p->length,
Bob Moore19d0cfe2008-06-10 15:54:40 +0800126 p->proximity_domain,
Alexey Starikovskiy15a58ed2007-02-02 19:48:22 +0300127 (p->flags & ACPI_SRAT_MEM_ENABLED)?
128 "enabled" : "disabled",
129 (p->flags & ACPI_SRAT_MEM_HOT_PLUGGABLE)?
130 " hot-pluggable" : ""));
Len Brown4be44fc2005-08-05 00:44:28 -0400131 }
132#endif /* ACPI_DEBUG_OUTPUT */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700133 break;
134
135 default:
Len Brown4be44fc2005-08-05 00:44:28 -0400136 printk(KERN_WARNING PREFIX
137 "Found unsupported SRAT entry (type = 0x%x)\n",
138 header->type);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700139 break;
140 }
141}
142
Fenghua Yu39b89312008-06-09 16:48:18 -0700143/*
144 * A lot of BIOS fill in 10 (= no distance) everywhere. This messes
145 * up the NUMA heuristics which wants the local node to have a smaller
146 * distance than the others.
147 * Do some quick checks here and only use the SLIT if it passes.
148 */
149static __init int slit_valid(struct acpi_table_slit *slit)
150{
151 int i, j;
152 int d = slit->locality_count;
153 for (i = 0; i < d; i++) {
154 for (j = 0; j < d; j++) {
155 u8 val = slit->entry[d*i + j];
156 if (i == j) {
157 if (val != LOCAL_DISTANCE)
158 return 0;
159 } else if (val <= LOCAL_DISTANCE)
160 return 0;
161 }
162 }
163 return 1;
164}
165
Alexey Starikovskiy15a58ed2007-02-02 19:48:22 +0300166static int __init acpi_parse_slit(struct acpi_table_header *table)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700167{
Len Brown4be44fc2005-08-05 00:44:28 -0400168 struct acpi_table_slit *slit;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700169
Alexey Starikovskiy15a58ed2007-02-02 19:48:22 +0300170 if (!table)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700171 return -EINVAL;
172
Alexey Starikovskiy15a58ed2007-02-02 19:48:22 +0300173 slit = (struct acpi_table_slit *)table;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700174
Fenghua Yu39b89312008-06-09 16:48:18 -0700175 if (!slit_valid(slit)) {
176 printk(KERN_INFO "ACPI: SLIT table looks invalid. Not used.\n");
177 return -EINVAL;
178 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700179 acpi_numa_slit_init(slit);
180
181 return 0;
182}
183
Linus Torvalds1da177e2005-04-16 15:20:36 -0700184static int __init
Alexey Starikovskiy15a58ed2007-02-02 19:48:22 +0300185acpi_parse_processor_affinity(struct acpi_subtable_header * header,
Len Brown4be44fc2005-08-05 00:44:28 -0400186 const unsigned long end)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700187{
Alexey Starikovskiy15a58ed2007-02-02 19:48:22 +0300188 struct acpi_srat_cpu_affinity *processor_affinity;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700189
Alexey Starikovskiy15a58ed2007-02-02 19:48:22 +0300190 processor_affinity = (struct acpi_srat_cpu_affinity *)header;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700191 if (!processor_affinity)
192 return -EINVAL;
193
194 acpi_table_print_srat_entry(header);
195
196 /* let architecture-dependent part to do it */
197 acpi_numa_processor_affinity_init(processor_affinity);
198
199 return 0;
200}
201
Linus Torvalds1da177e2005-04-16 15:20:36 -0700202static int __init
Alexey Starikovskiy15a58ed2007-02-02 19:48:22 +0300203acpi_parse_memory_affinity(struct acpi_subtable_header * header,
Len Brown4be44fc2005-08-05 00:44:28 -0400204 const unsigned long end)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700205{
Alexey Starikovskiy15a58ed2007-02-02 19:48:22 +0300206 struct acpi_srat_mem_affinity *memory_affinity;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700207
Alexey Starikovskiy15a58ed2007-02-02 19:48:22 +0300208 memory_affinity = (struct acpi_srat_mem_affinity *)header;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700209 if (!memory_affinity)
210 return -EINVAL;
211
212 acpi_table_print_srat_entry(header);
213
214 /* let architecture-dependent part to do it */
215 acpi_numa_memory_affinity_init(memory_affinity);
216
217 return 0;
218}
219
Alexey Starikovskiy15a58ed2007-02-02 19:48:22 +0300220static int __init acpi_parse_srat(struct acpi_table_header *table)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700221{
Len Brown4be44fc2005-08-05 00:44:28 -0400222 struct acpi_table_srat *srat;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700223
Alexey Starikovskiy15a58ed2007-02-02 19:48:22 +0300224 if (!table)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700225 return -EINVAL;
226
Alexey Starikovskiy15a58ed2007-02-02 19:48:22 +0300227 srat = (struct acpi_table_srat *)table;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700228
229 return 0;
230}
231
David Rientjesae2c6dc2007-07-21 17:09:56 +0200232static int __init
Alexey Starikovskiy15a58ed2007-02-02 19:48:22 +0300233acpi_table_parse_srat(enum acpi_srat_type id,
Len Brown5a8765a2007-02-10 21:35:47 -0500234 acpi_table_entry_handler handler, unsigned int max_entries)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700235{
Len Brown6eb87fe2007-02-10 22:17:07 -0500236 return acpi_table_parse_entries(ACPI_SIG_SRAT,
Len Brown4be44fc2005-08-05 00:44:28 -0400237 sizeof(struct acpi_table_srat), id,
238 handler, max_entries);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700239}
240
Len Brown4be44fc2005-08-05 00:44:28 -0400241int __init acpi_numa_init(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700242{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700243 /* SRAT: Static Resource Affinity Table */
Len Brown7f8f97c2007-02-10 21:28:03 -0500244 if (!acpi_table_parse(ACPI_SIG_SRAT, acpi_parse_srat)) {
David Rientjesae2c6dc2007-07-21 17:09:56 +0200245 acpi_table_parse_srat(ACPI_SRAT_TYPE_CPU_AFFINITY,
246 acpi_parse_processor_affinity, NR_CPUS);
247 acpi_table_parse_srat(ACPI_SRAT_TYPE_MEMORY_AFFINITY,
248 acpi_parse_memory_affinity,
249 NR_NODE_MEMBLKS);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700250 }
251
252 /* SLIT: System Locality Information Table */
Len Brown7f8f97c2007-02-10 21:28:03 -0500253 acpi_table_parse(ACPI_SIG_SLIT, acpi_parse_slit);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700254
255 acpi_numa_arch_fixup();
256 return 0;
257}
258
Yasunori Goto7e81ab92007-05-08 20:27:01 -0700259int acpi_get_pxm(acpi_handle h)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700260{
261 unsigned long pxm;
262 acpi_status status;
263 acpi_handle handle;
264 acpi_handle phandle = h;
265
266 do {
267 handle = phandle;
268 status = acpi_evaluate_integer(handle, "_PXM", NULL, &pxm);
269 if (ACPI_SUCCESS(status))
Jan Engelhardt50dd0962006-10-01 00:28:50 +0200270 return pxm;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700271 status = acpi_get_parent(handle, &phandle);
Len Brown4be44fc2005-08-05 00:44:28 -0400272 } while (ACPI_SUCCESS(status));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700273 return -1;
274}
Yasunori Goto1e3590e2006-06-27 02:53:31 -0700275
Yasunori Goto7e81ab92007-05-08 20:27:01 -0700276int acpi_get_node(acpi_handle *handle)
Yasunori Goto1e3590e2006-06-27 02:53:31 -0700277{
278 int pxm, node = -1;
279
Yasunori Goto1e3590e2006-06-27 02:53:31 -0700280 pxm = acpi_get_pxm(handle);
281 if (pxm >= 0)
282 node = acpi_map_pxm_to_node(pxm);
283
Len Brown635227e2006-07-01 16:48:23 -0400284 return node;
Yasunori Goto1e3590e2006-06-27 02:53:31 -0700285}
286EXPORT_SYMBOL(acpi_get_node);