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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
33#define ACPI_NUMA 0x80000000
34#define _COMPONENT ACPI_NUMA
35ACPI_MODULE_NAME("numa");
36
37static nodemask_t nodes_found_map = NODE_MASK_NONE;
38
39
40static int pxm_to_node_map[MAX_PXM_DOMAINS]
41 = { [0 ... MAX_PXM_DOMAINS - 1] = NID_INVAL };
42static int node_to_pxm_map[MAX_NUMNODES]
43 = { [0 ... MAX_NUMNODES - 1] = PXM_INVAL };
44
45int pxm_to_node(int pxm)
46{
47 if (pxm < 0)
48 return NID_INVAL;
49 return pxm_to_node_map[pxm];
50}
51
52int node_to_pxm(int node)
53{
54 if (node < 0)
55 return PXM_INVAL;
56 return node_to_pxm_map[node];
57}
58
59void __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
65int acpi_map_pxm_to_node(int pxm)
66{
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);
73 __acpi_map_pxm_to_node(pxm, node);
74 node_set(node, nodes_found_map);
75 }
76
77 return node;
78}
79
80#if 0
81void __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}
88#endif
89
90static void __init
91acpi_table_print_srat_entry(struct acpi_subtable_header *header)
92{
93
94 ACPI_FUNCTION_NAME("acpi_table_print_srat_entry");
95
96 if (!header)
97 return;
98
99 switch (header->type) {
100
101 case ACPI_SRAT_TYPE_CPU_AFFINITY:
102#ifdef ACPI_DEBUG_OUTPUT
103 {
104 struct acpi_srat_cpu_affinity *p =
105 (struct acpi_srat_cpu_affinity *)header;
106 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
107 "SRAT Processor (id[0x%02x] eid[0x%02x]) in proximity domain %d %s\n",
108 p->apic_id, p->local_sapic_eid,
109 p->proximity_domain_lo,
110 (p->flags & ACPI_SRAT_CPU_ENABLED)?
111 "enabled" : "disabled"));
112 }
113#endif
114 break;
115
116 case ACPI_SRAT_TYPE_MEMORY_AFFINITY:
117#ifdef ACPI_DEBUG_OUTPUT
118 {
119 struct acpi_srat_mem_affinity *p =
120 (struct acpi_srat_mem_affinity *)header;
121 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
122 "SRAT Memory (0x%lx length 0x%lx) in proximity domain %d %s%s\n",
123 (unsigned long)p->base_address,
124 (unsigned long)p->length,
125 p->proximity_domain,
126 (p->flags & ACPI_SRAT_MEM_ENABLED)?
127 "enabled" : "disabled",
128 (p->flags & ACPI_SRAT_MEM_HOT_PLUGGABLE)?
129 " hot-pluggable" : ""));
130 }
131#endif
132 break;
133
134 case ACPI_SRAT_TYPE_X2APIC_CPU_AFFINITY:
135#ifdef ACPI_DEBUG_OUTPUT
136 {
137 struct acpi_srat_x2apic_cpu_affinity *p =
138 (struct acpi_srat_x2apic_cpu_affinity *)header;
139 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
140 "SRAT Processor (x2apicid[0x%08x]) in"
141 " proximity domain %d %s\n",
142 p->apic_id,
143 p->proximity_domain,
144 (p->flags & ACPI_SRAT_CPU_ENABLED) ?
145 "enabled" : "disabled"));
146 }
147#endif
148 break;
149 default:
150 printk(KERN_WARNING PREFIX
151 "Found unsupported SRAT entry (type = 0x%x)\n",
152 header->type);
153 break;
154 }
155}
156
157
158
159
160
161
162
163static __init int slit_valid(struct acpi_table_slit *slit)
164{
165 int i, j;
166 int d = slit->locality_count;
167 for (i = 0; i < d; i++) {
168 for (j = 0; j < d; j++) {
169 u8 val = slit->entry[d*i + j];
170 if (i == j) {
171 if (val != LOCAL_DISTANCE)
172 return 0;
173 } else if (val <= LOCAL_DISTANCE)
174 return 0;
175 }
176 }
177 return 1;
178}
179
180static int __init acpi_parse_slit(struct acpi_table_header *table)
181{
182 struct acpi_table_slit *slit;
183
184 if (!table)
185 return -EINVAL;
186
187 slit = (struct acpi_table_slit *)table;
188
189 if (!slit_valid(slit)) {
190 printk(KERN_INFO "ACPI: SLIT table looks invalid. Not used.\n");
191 return -EINVAL;
192 }
193 acpi_numa_slit_init(slit);
194
195 return 0;
196}
197
198void __init __attribute__ ((weak))
199acpi_numa_x2apic_affinity_init(struct acpi_srat_x2apic_cpu_affinity *pa)
200{
201 printk(KERN_WARNING PREFIX
202 "Found unsupported x2apic [0x%08x] SRAT entry\n", pa->apic_id);
203 return;
204}
205
206
207static int __init
208acpi_parse_x2apic_affinity(struct acpi_subtable_header *header,
209 const unsigned long end)
210{
211 struct acpi_srat_x2apic_cpu_affinity *processor_affinity;
212
213 processor_affinity = (struct acpi_srat_x2apic_cpu_affinity *)header;
214 if (!processor_affinity)
215 return -EINVAL;
216
217 acpi_table_print_srat_entry(header);
218
219
220 acpi_numa_x2apic_affinity_init(processor_affinity);
221
222 return 0;
223}
224
225static int __init
226acpi_parse_processor_affinity(struct acpi_subtable_header *header,
227 const unsigned long end)
228{
229 struct acpi_srat_cpu_affinity *processor_affinity;
230
231 processor_affinity = (struct acpi_srat_cpu_affinity *)header;
232 if (!processor_affinity)
233 return -EINVAL;
234
235 acpi_table_print_srat_entry(header);
236
237
238 acpi_numa_processor_affinity_init(processor_affinity);
239
240 return 0;
241}
242
243static int __init
244acpi_parse_memory_affinity(struct acpi_subtable_header * header,
245 const unsigned long end)
246{
247 struct acpi_srat_mem_affinity *memory_affinity;
248
249 memory_affinity = (struct acpi_srat_mem_affinity *)header;
250 if (!memory_affinity)
251 return -EINVAL;
252
253 acpi_table_print_srat_entry(header);
254
255
256 acpi_numa_memory_affinity_init(memory_affinity);
257
258 return 0;
259}
260
261static int __init acpi_parse_srat(struct acpi_table_header *table)
262{
263 struct acpi_table_srat *srat;
264
265 if (!table)
266 return -EINVAL;
267
268 srat = (struct acpi_table_srat *)table;
269
270 return 0;
271}
272
273static int __init
274acpi_table_parse_srat(enum acpi_srat_type id,
275 acpi_table_entry_handler handler, unsigned int max_entries)
276{
277 return acpi_table_parse_entries(ACPI_SIG_SRAT,
278 sizeof(struct acpi_table_srat), id,
279 handler, max_entries);
280}
281
282int __init acpi_numa_init(void)
283{
284
285 if (!acpi_table_parse(ACPI_SIG_SRAT, acpi_parse_srat)) {
286 acpi_table_parse_srat(ACPI_SRAT_TYPE_X2APIC_CPU_AFFINITY,
287 acpi_parse_x2apic_affinity, NR_CPUS);
288 acpi_table_parse_srat(ACPI_SRAT_TYPE_CPU_AFFINITY,
289 acpi_parse_processor_affinity, NR_CPUS);
290 acpi_table_parse_srat(ACPI_SRAT_TYPE_MEMORY_AFFINITY,
291 acpi_parse_memory_affinity,
292 NR_NODE_MEMBLKS);
293 }
294
295
296 acpi_table_parse(ACPI_SIG_SLIT, acpi_parse_slit);
297
298 acpi_numa_arch_fixup();
299 return 0;
300}
301
302int acpi_get_pxm(acpi_handle h)
303{
304 unsigned long long pxm;
305 acpi_status status;
306 acpi_handle handle;
307 acpi_handle phandle = h;
308
309 do {
310 handle = phandle;
311 status = acpi_evaluate_integer(handle, "_PXM", NULL, &pxm);
312 if (ACPI_SUCCESS(status))
313 return pxm;
314 status = acpi_get_parent(handle, &phandle);
315 } while (ACPI_SUCCESS(status));
316 return -1;
317}
318
319int acpi_get_node(acpi_handle *handle)
320{
321 int pxm, node = -1;
322
323 pxm = acpi_get_pxm(handle);
324 if (pxm >= 0 && pxm < MAX_PXM_DOMAINS)
325 node = acpi_map_pxm_to_node(pxm);
326
327 return node;
328}
329EXPORT_SYMBOL(acpi_get_node);
330
