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25#include <linux/module.h>
26#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
36ACPI_MODULE_NAME("numa");
37
38static nodemask_t nodes_found_map = NODE_MASK_NONE;
39
40
41static int pxm_to_node_map[MAX_PXM_DOMAINS]
42 = { [0 ... MAX_PXM_DOMAINS - 1] = NID_INVAL };
43static int node_to_pxm_map[MAX_NUMNODES]
44 = { [0 ... MAX_NUMNODES - 1] = PXM_INVAL };
45
46int pxm_to_node(int pxm)
47{
48 if (pxm < 0)
49 return NID_INVAL;
50 return pxm_to_node_map[pxm];
51}
52
53int node_to_pxm(int node)
54{
55 if (node < 0)
56 return PXM_INVAL;
57 return node_to_pxm_map[node];
58}
59
60void __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
66int acpi_map_pxm_to_node(int pxm)
67{
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);
74 __acpi_map_pxm_to_node(pxm, node);
75 node_set(node, nodes_found_map);
76 }
77
78 return node;
79}
80
81#if 0
82void __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}
89#endif
90
91static void __init
92acpi_table_print_srat_entry(struct acpi_subtable_header *header)
93{
94
95 ACPI_FUNCTION_NAME("acpi_table_print_srat_entry");
96
97 if (!header)
98 return;
99
100 switch (header->type) {
101
102 case ACPI_SRAT_TYPE_CPU_AFFINITY:
103#ifdef ACPI_DEBUG_OUTPUT
104 {
105 struct acpi_srat_cpu_affinity *p =
106 (struct acpi_srat_cpu_affinity *)header;
107 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
108 "SRAT Processor (id[0x%02x] eid[0x%02x]) in proximity domain %d %s\n",
109 p->apic_id, p->local_sapic_eid,
110 p->proximity_domain_lo,
111 (p->flags & ACPI_SRAT_CPU_ENABLED)?
112 "enabled" : "disabled"));
113 }
114#endif
115 break;
116
117 case ACPI_SRAT_TYPE_MEMORY_AFFINITY:
118#ifdef ACPI_DEBUG_OUTPUT
119 {
120 struct acpi_srat_mem_affinity *p =
121 (struct acpi_srat_mem_affinity *)header;
122 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
123 "SRAT Memory (0x%lx length 0x%lx) in proximity domain %d %s%s\n",
124 (unsigned long)p->base_address,
125 (unsigned long)p->length,
126 p->proximity_domain,
127 (p->flags & ACPI_SRAT_MEM_ENABLED)?
128 "enabled" : "disabled",
129 (p->flags & ACPI_SRAT_MEM_HOT_PLUGGABLE)?
130 " hot-pluggable" : ""));
131 }
132#endif
133 break;
134
135 default:
136 printk(KERN_WARNING PREFIX
137 "Found unsupported SRAT entry (type = 0x%x)\n",
138 header->type);
139 break;
140 }
141}
142
143
144
145
146
147
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
166static int __init acpi_parse_slit(struct acpi_table_header *table)
167{
168 struct acpi_table_slit *slit;
169
170 if (!table)
171 return -EINVAL;
172
173 slit = (struct acpi_table_slit *)table;
174
175 if (!slit_valid(slit)) {
176 printk(KERN_INFO "ACPI: SLIT table looks invalid. Not used.\n");
177 return -EINVAL;
178 }
179 acpi_numa_slit_init(slit);
180
181 return 0;
182}
183
184static int __init
185acpi_parse_processor_affinity(struct acpi_subtable_header * header,
186 const unsigned long end)
187{
188 struct acpi_srat_cpu_affinity *processor_affinity;
189
190 processor_affinity = (struct acpi_srat_cpu_affinity *)header;
191 if (!processor_affinity)
192 return -EINVAL;
193
194 acpi_table_print_srat_entry(header);
195
196
197 acpi_numa_processor_affinity_init(processor_affinity);
198
199 return 0;
200}
201
202static int __init
203acpi_parse_memory_affinity(struct acpi_subtable_header * header,
204 const unsigned long end)
205{
206 struct acpi_srat_mem_affinity *memory_affinity;
207
208 memory_affinity = (struct acpi_srat_mem_affinity *)header;
209 if (!memory_affinity)
210 return -EINVAL;
211
212 acpi_table_print_srat_entry(header);
213
214
215 acpi_numa_memory_affinity_init(memory_affinity);
216
217 return 0;
218}
219
220static int __init acpi_parse_srat(struct acpi_table_header *table)
221{
222 struct acpi_table_srat *srat;
223
224 if (!table)
225 return -EINVAL;
226
227 srat = (struct acpi_table_srat *)table;
228
229 return 0;
230}
231
232static int __init
233acpi_table_parse_srat(enum acpi_srat_type id,
234 acpi_table_entry_handler handler, unsigned int max_entries)
235{
236 return acpi_table_parse_entries(ACPI_SIG_SRAT,
237 sizeof(struct acpi_table_srat), id,
238 handler, max_entries);
239}
240
241int __init acpi_numa_init(void)
242{
243
244 if (!acpi_table_parse(ACPI_SIG_SRAT, acpi_parse_srat)) {
245 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);
250 }
251
252
253 acpi_table_parse(ACPI_SIG_SLIT, acpi_parse_slit);
254
255 acpi_numa_arch_fixup();
256 return 0;
257}
258
259int acpi_get_pxm(acpi_handle h)
260{
261 unsigned long 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))
270 return pxm;
271 status = acpi_get_parent(handle, &phandle);
272 } while (ACPI_SUCCESS(status));
273 return -1;
274}
275
276int acpi_get_node(acpi_handle *handle)
277{
278 int pxm, node = -1;
279
280 pxm = acpi_get_pxm(handle);
281 if (pxm >= 0)
282 node = acpi_map_pxm_to_node(pxm);
283
284 return node;
285}
286EXPORT_SYMBOL(acpi_get_node);
287
