drivers/acpi/numa.c

   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/config.h>
  27 #include <linux/init.h>
  28 #include <linux/kernel.h>
  29 #include <linux/types.h>
  30 #include <linux/errno.h>
  31 #include <linux/acpi.h>
  32 #include <acpi/acpi_bus.h>
  33 #include <acpi/acmacros.h>
  34
  35 #define ACPI_NUMA       0x80000000
  36 #define _COMPONENT      ACPI_NUMA
  37         ACPI_MODULE_NAME ("numa")
  38
  39 extern int __init acpi_table_parse_madt_family (enum acpi_table_id id, unsigned long madt_size, int entry_id, acpi_madt_entry_handler handler, unsigned int max_entries);
  40
  41 void __init
  42 acpi_table_print_srat_entry (
  43         acpi_table_entry_header *header)
  44 {
  45
  46         ACPI_FUNCTION_NAME ("acpi_table_print_srat_entry");
  47
  48         if (!header)
  49                 return;
  50
  51         switch (header->type) {
  52
  53         case ACPI_SRAT_PROCESSOR_AFFINITY:
  54 #ifdef ACPI_DEBUG_OUTPUT
  55         {
  56                 struct acpi_table_processor_affinity *p =
  57                         (struct acpi_table_processor_affinity*) header;
  58                 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "SRAT Processor (id[0x%02x] eid[0x%02x]) in proximity domain %d %s\n",
  59                        p->apic_id, p->lsapic_eid, p->proximity_domain,
  60                        p->flags.enabled?"enabled":"disabled"));
  61         }
  62 #endif /* ACPI_DEBUG_OUTPUT */
  63                 break;
  64
  65         case ACPI_SRAT_MEMORY_AFFINITY:
  66 #ifdef ACPI_DEBUG_OUTPUT
  67         {
  68                 struct acpi_table_memory_affinity *p =
  69                         (struct acpi_table_memory_affinity*) header;
  70                 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "SRAT Memory (0x%08x%08x length 0x%08x%08x type 0x%x) in proximity domain %d %s%s\n",
  71                        p->base_addr_hi, p->base_addr_lo, p->length_hi, p->length_lo,
  72                        p->memory_type, p->proximity_domain,
  73                        p->flags.enabled ? "enabled" : "disabled",
  74                        p->flags.hot_pluggable ? " hot-pluggable" : ""));
  75         }
  76 #endif /* ACPI_DEBUG_OUTPUT */
  77                 break;
  78
  79         default:
  80                 printk(KERN_WARNING PREFIX "Found unsupported SRAT entry (type = 0x%x)\n",
  81                         header->type);
  82                 break;
  83         }
  84 }
  85
  86
  87 static int __init
  88 acpi_parse_slit (unsigned long phys_addr, unsigned long size)
  89 {
  90         struct acpi_table_slit  *slit;
  91         u32                     localities;
  92
  93         if (!phys_addr || !size)
  94                 return -EINVAL;
  95
  96         slit = (struct acpi_table_slit *) __va(phys_addr);
  97
  98         /* downcast just for %llu vs %lu for i386/ia64  */
  99         localities = (u32) slit->localities;
 100
 101         acpi_numa_slit_init(slit);
 102
 103         return 0;
 104 }
 105
 106
 107 static int __init
 108 acpi_parse_processor_affinity (
 109         acpi_table_entry_header *header,
 110         const unsigned long end)
 111 {
 112         struct acpi_table_processor_affinity *processor_affinity;
 113
 114         processor_affinity = (struct acpi_table_processor_affinity*) header;
 115         if (!processor_affinity)
 116                 return -EINVAL;
 117
 118         acpi_table_print_srat_entry(header);
 119
 120         /* let architecture-dependent part to do it */
 121         acpi_numa_processor_affinity_init(processor_affinity);
 122
 123         return 0;
 124 }
 125
 126
 127 static int __init
 128 acpi_parse_memory_affinity (
 129         acpi_table_entry_header *header,
 130         const unsigned long end)
 131 {
 132         struct acpi_table_memory_affinity *memory_affinity;
 133
 134         memory_affinity = (struct acpi_table_memory_affinity*) header;
 135         if (!memory_affinity)
 136                 return -EINVAL;
 137
 138         acpi_table_print_srat_entry(header);
 139
 140         /* let architecture-dependent part to do it */
 141         acpi_numa_memory_affinity_init(memory_affinity);
 142
 143         return 0;
 144 }
 145
 146
 147 static int __init
 148 acpi_parse_srat (unsigned long phys_addr, unsigned long size)
 149 {
 150         struct acpi_table_srat  *srat;
 151
 152         if (!phys_addr || !size)
 153                 return -EINVAL;
 154
 155         srat = (struct acpi_table_srat *) __va(phys_addr);
 156
 157         return 0;
 158 }
 159
 160
 161 int __init
 162 acpi_table_parse_srat (
 163         enum acpi_srat_entry_id id,
 164         acpi_madt_entry_handler handler,
 165         unsigned int max_entries)
 166 {
 167         return acpi_table_parse_madt_family(ACPI_SRAT, sizeof(struct acpi_table_srat),
 168                                             id, handler, max_entries);
 169 }
 170
 171
 172 int __init
 173 acpi_numa_init(void)
 174 {
 175         int                     result;
 176
 177         /* SRAT: Static Resource Affinity Table */
 178         result = acpi_table_parse(ACPI_SRAT, acpi_parse_srat);
 179
 180         if (result > 0) {
 181                 result = acpi_table_parse_srat(ACPI_SRAT_PROCESSOR_AFFINITY,
 182                                                acpi_parse_processor_affinity,
 183                                                NR_CPUS);
 184                 result = acpi_table_parse_srat(ACPI_SRAT_MEMORY_AFFINITY,
 185                                                acpi_parse_memory_affinity,
 186                                                NR_NODE_MEMBLKS);        // IA64 specific
 187         }
 188
 189         /* SLIT: System Locality Information Table */
 190         result = acpi_table_parse(ACPI_SLIT, acpi_parse_slit);
 191
 192         acpi_numa_arch_fixup();
 193         return 0;
 194 }
 195
 196 int
 197 acpi_get_pxm(acpi_handle h)
 198 {
 199         unsigned long pxm;
 200         acpi_status status;
 201         acpi_handle handle;
 202         acpi_handle phandle = h;
 203
 204         do {
 205                 handle = phandle;
 206                 status = acpi_evaluate_integer(handle, "_PXM", NULL, &pxm);
 207                 if (ACPI_SUCCESS(status))
 208                         return (int)pxm;
 209                 status = acpi_get_parent(handle, &phandle);
 210         } while(ACPI_SUCCESS(status));
 211         return -1;
 212 }
 213 EXPORT_SYMBOL(acpi_get_pxm);