ia64/linux-2.6.18-xen.hg

view drivers/acpi/numa.c @ 912:dd42cdb0ab89

[IA64] Build blktap2 driver by default in x86 builds.

add CONFIG_XEN_BLKDEV_TAP2=y to buildconfigs/linux-defconfig_xen_ia64.

Signed-off-by: Isaku Yamahata <yamahata@valinux.co.jp>
author Isaku Yamahata <yamahata@valinux.co.jp>
date Mon Jun 29 12:09:16 2009 +0900 (2009-06-29)
parents 831230e53067
children
line source
1 /*
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>
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>
34 #define ACPI_NUMA 0x80000000
35 #define _COMPONENT ACPI_NUMA
36 ACPI_MODULE_NAME("numa")
38 static nodemask_t nodes_found_map = NODE_MASK_NONE;
39 #define PXM_INVAL -1
40 #define NID_INVAL -1
42 /* maps to convert between proximity domain and logical node ID */
43 int __cpuinitdata pxm_to_node_map[MAX_PXM_DOMAINS]
44 = { [0 ... MAX_PXM_DOMAINS - 1] = NID_INVAL };
45 int __cpuinitdata node_to_pxm_map[MAX_NUMNODES]
46 = { [0 ... MAX_NUMNODES - 1] = PXM_INVAL };
48 extern int __init acpi_table_parse_madt_family(enum acpi_table_id id,
49 unsigned long madt_size,
50 int entry_id,
51 acpi_madt_entry_handler handler,
52 unsigned int max_entries);
54 int __cpuinit pxm_to_node(int pxm)
55 {
56 if (pxm < 0)
57 return NID_INVAL;
58 return pxm_to_node_map[pxm];
59 }
61 int __cpuinit node_to_pxm(int node)
62 {
63 if (node < 0)
64 return PXM_INVAL;
65 return node_to_pxm_map[node];
66 }
68 int __cpuinit acpi_map_pxm_to_node(int pxm)
69 {
70 int node = pxm_to_node_map[pxm];
72 if (node < 0){
73 if (nodes_weight(nodes_found_map) >= MAX_NUMNODES)
74 return NID_INVAL;
75 node = first_unset_node(nodes_found_map);
76 pxm_to_node_map[pxm] = node;
77 node_to_pxm_map[node] = pxm;
78 node_set(node, nodes_found_map);
79 }
81 return node;
82 }
84 void __cpuinit acpi_unmap_pxm_to_node(int node)
85 {
86 int pxm = node_to_pxm_map[node];
87 pxm_to_node_map[pxm] = NID_INVAL;
88 node_to_pxm_map[node] = PXM_INVAL;
89 node_clear(node, nodes_found_map);
90 }
92 void __init acpi_table_print_srat_entry(acpi_table_entry_header * header)
93 {
95 ACPI_FUNCTION_NAME("acpi_table_print_srat_entry");
97 if (!header)
98 return;
100 switch (header->type) {
102 case ACPI_SRAT_PROCESSOR_AFFINITY:
103 #ifdef ACPI_DEBUG_OUTPUT
104 {
105 struct acpi_table_processor_affinity *p =
106 (struct acpi_table_processor_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->lsapic_eid,
110 p->proximity_domain,
111 p->flags.
112 enabled ? "enabled" : "disabled"));
113 }
114 #endif /* ACPI_DEBUG_OUTPUT */
115 break;
117 case ACPI_SRAT_MEMORY_AFFINITY:
118 #ifdef ACPI_DEBUG_OUTPUT
119 {
120 struct acpi_table_memory_affinity *p =
121 (struct acpi_table_memory_affinity *)header;
122 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
123 "SRAT Memory (0x%08x%08x length 0x%08x%08x type 0x%x) in proximity domain %d %s%s\n",
124 p->base_addr_hi, p->base_addr_lo,
125 p->length_hi, p->length_lo,
126 p->memory_type, p->proximity_domain,
127 p->flags.
128 enabled ? "enabled" : "disabled",
129 p->flags.
130 hot_pluggable ? " hot-pluggable" :
131 ""));
132 }
133 #endif /* ACPI_DEBUG_OUTPUT */
134 break;
136 default:
137 printk(KERN_WARNING PREFIX
138 "Found unsupported SRAT entry (type = 0x%x)\n",
139 header->type);
140 break;
141 }
142 }
144 static int __init acpi_parse_slit(unsigned long phys_addr, unsigned long size)
145 {
146 struct acpi_table_slit *slit;
147 u32 localities;
149 if (!phys_addr || !size)
150 return -EINVAL;
152 slit = (struct acpi_table_slit *)__va(phys_addr);
154 /* downcast just for %llu vs %lu for i386/ia64 */
155 localities = (u32) slit->localities;
157 acpi_numa_slit_init(slit);
159 return 0;
160 }
162 static int __init
163 acpi_parse_processor_affinity(acpi_table_entry_header * header,
164 const unsigned long end)
165 {
166 struct acpi_table_processor_affinity *processor_affinity;
168 processor_affinity = (struct acpi_table_processor_affinity *)header;
169 if (!processor_affinity)
170 return -EINVAL;
172 acpi_table_print_srat_entry(header);
174 /* let architecture-dependent part to do it */
175 acpi_numa_processor_affinity_init(processor_affinity);
177 return 0;
178 }
180 static int __init
181 acpi_parse_memory_affinity(acpi_table_entry_header * header,
182 const unsigned long end)
183 {
184 struct acpi_table_memory_affinity *memory_affinity;
186 memory_affinity = (struct acpi_table_memory_affinity *)header;
187 if (!memory_affinity)
188 return -EINVAL;
190 acpi_table_print_srat_entry(header);
192 /* let architecture-dependent part to do it */
193 acpi_numa_memory_affinity_init(memory_affinity);
195 return 0;
196 }
198 static int __init acpi_parse_srat(unsigned long phys_addr, unsigned long size)
199 {
200 struct acpi_table_srat *srat;
202 if (!phys_addr || !size)
203 return -EINVAL;
205 srat = (struct acpi_table_srat *)__va(phys_addr);
207 return 0;
208 }
210 int __init
211 acpi_table_parse_srat(enum acpi_srat_entry_id id,
212 acpi_madt_entry_handler handler, unsigned int max_entries)
213 {
214 return acpi_table_parse_madt_family(ACPI_SRAT,
215 sizeof(struct acpi_table_srat), id,
216 handler, max_entries);
217 }
219 int __init acpi_numa_init(void)
220 {
221 int result;
223 /* SRAT: Static Resource Affinity Table */
224 result = acpi_table_parse(ACPI_SRAT, acpi_parse_srat);
226 if (result > 0) {
227 result = acpi_table_parse_srat(ACPI_SRAT_PROCESSOR_AFFINITY,
228 acpi_parse_processor_affinity,
229 NR_CPUS);
230 result = acpi_table_parse_srat(ACPI_SRAT_MEMORY_AFFINITY, acpi_parse_memory_affinity, NR_NODE_MEMBLKS); // IA64 specific
231 }
233 /* SLIT: System Locality Information Table */
234 result = acpi_table_parse(ACPI_SLIT, acpi_parse_slit);
236 acpi_numa_arch_fixup();
237 return 0;
238 }
240 int acpi_get_pxm(acpi_handle h)
241 {
242 unsigned long pxm;
243 acpi_status status;
244 acpi_handle handle;
245 acpi_handle phandle = h;
247 do {
248 handle = phandle;
249 status = acpi_evaluate_integer(handle, "_PXM", NULL, &pxm);
250 if (ACPI_SUCCESS(status))
251 return (int)pxm;
252 status = acpi_get_parent(handle, &phandle);
253 } while (ACPI_SUCCESS(status));
254 return -1;
255 }
256 EXPORT_SYMBOL(acpi_get_pxm);
258 int acpi_get_node(acpi_handle *handle)
259 {
260 int pxm, node = -1;
262 pxm = acpi_get_pxm(handle);
263 if (pxm >= 0)
264 node = acpi_map_pxm_to_node(pxm);
266 return node;
267 }
268 EXPORT_SYMBOL(acpi_get_node);