| /* |
| * acpi_numa.c - ACPI NUMA support |
| * |
| * Copyright (C) 2002 Takayoshi Kochi <t-kochi@bq.jp.nec.com> |
| * |
| * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License as published by |
| * the Free Software Foundation; either version 2 of the License, or |
| * (at your option) any later version. |
| * |
| * This program is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| * GNU General Public License for more details. |
| * |
| * You should have received a copy of the GNU General Public License |
| * along with this program; if not, write to the Free Software |
| * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| * |
| * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ |
| * |
| */ |
| #include <linux/module.h> |
| #include <linux/init.h> |
| #include <linux/kernel.h> |
| #include <linux/types.h> |
| #include <linux/errno.h> |
| #include <linux/acpi.h> |
| #include <acpi/acpi_bus.h> |
| #include <acpi/acmacros.h> |
| |
| #define ACPI_NUMA 0x80000000 |
| #define _COMPONENT ACPI_NUMA |
| ACPI_MODULE_NAME("numa"); |
| |
| static nodemask_t nodes_found_map = NODE_MASK_NONE; |
| #define PXM_INVAL -1 |
| #define NID_INVAL -1 |
| |
| /* maps to convert between proximity domain and logical node ID */ |
| static int pxm_to_node_map[MAX_PXM_DOMAINS] |
| = { [0 ... MAX_PXM_DOMAINS - 1] = NID_INVAL }; |
| static int node_to_pxm_map[MAX_NUMNODES] |
| = { [0 ... MAX_NUMNODES - 1] = PXM_INVAL }; |
| |
| int pxm_to_node(int pxm) |
| { |
| if (pxm < 0) |
| return NID_INVAL; |
| return pxm_to_node_map[pxm]; |
| } |
| |
| int node_to_pxm(int node) |
| { |
| if (node < 0) |
| return PXM_INVAL; |
| return node_to_pxm_map[node]; |
| } |
| |
| int __cpuinit acpi_map_pxm_to_node(int pxm) |
| { |
| int node = pxm_to_node_map[pxm]; |
| |
| if (node < 0){ |
| if (nodes_weight(nodes_found_map) >= MAX_NUMNODES) |
| return NID_INVAL; |
| node = first_unset_node(nodes_found_map); |
| pxm_to_node_map[pxm] = node; |
| node_to_pxm_map[node] = pxm; |
| node_set(node, nodes_found_map); |
| } |
| |
| return node; |
| } |
| |
| void __cpuinit acpi_unmap_pxm_to_node(int node) |
| { |
| int pxm = node_to_pxm_map[node]; |
| pxm_to_node_map[pxm] = NID_INVAL; |
| node_to_pxm_map[node] = PXM_INVAL; |
| node_clear(node, nodes_found_map); |
| } |
| |
| void __init acpi_table_print_srat_entry(struct acpi_subtable_header * header) |
| { |
| |
| ACPI_FUNCTION_NAME("acpi_table_print_srat_entry"); |
| |
| if (!header) |
| return; |
| |
| switch (header->type) { |
| |
| case ACPI_SRAT_TYPE_CPU_AFFINITY: |
| #ifdef ACPI_DEBUG_OUTPUT |
| { |
| struct acpi_srat_cpu_affinity *p = |
| (struct acpi_srat_cpu_affinity *)header; |
| ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
| "SRAT Processor (id[0x%02x] eid[0x%02x]) in proximity domain %d %s\n", |
| p->apic_id, p->local_sapic_eid, |
| p->proximity_domain_lo, |
| (p->flags & ACPI_SRAT_CPU_ENABLED)? |
| "enabled" : "disabled")); |
| } |
| #endif /* ACPI_DEBUG_OUTPUT */ |
| break; |
| |
| case ACPI_SRAT_TYPE_MEMORY_AFFINITY: |
| #ifdef ACPI_DEBUG_OUTPUT |
| { |
| struct acpi_srat_mem_affinity *p = |
| (struct acpi_srat_mem_affinity *)header; |
| ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
| "SRAT Memory (0x%lx length 0x%lx type 0x%x) in proximity domain %d %s%s\n", |
| (unsigned long)p->base_address, |
| (unsigned long)p->length, |
| p->memory_type, p->proximity_domain, |
| (p->flags & ACPI_SRAT_MEM_ENABLED)? |
| "enabled" : "disabled", |
| (p->flags & ACPI_SRAT_MEM_HOT_PLUGGABLE)? |
| " hot-pluggable" : "")); |
| } |
| #endif /* ACPI_DEBUG_OUTPUT */ |
| break; |
| |
| default: |
| printk(KERN_WARNING PREFIX |
| "Found unsupported SRAT entry (type = 0x%x)\n", |
| header->type); |
| break; |
| } |
| } |
| |
| static int __init acpi_parse_slit(struct acpi_table_header *table) |
| { |
| struct acpi_table_slit *slit; |
| u32 localities; |
| |
| if (!table) |
| return -EINVAL; |
| |
| slit = (struct acpi_table_slit *)table; |
| |
| /* downcast just for %llu vs %lu for i386/ia64 */ |
| localities = (u32) slit->locality_count; |
| |
| acpi_numa_slit_init(slit); |
| |
| return 0; |
| } |
| |
| static int __init |
| acpi_parse_processor_affinity(struct acpi_subtable_header * header, |
| const unsigned long end) |
| { |
| struct acpi_srat_cpu_affinity *processor_affinity; |
| |
| processor_affinity = (struct acpi_srat_cpu_affinity *)header; |
| if (!processor_affinity) |
| return -EINVAL; |
| |
| acpi_table_print_srat_entry(header); |
| |
| /* let architecture-dependent part to do it */ |
| acpi_numa_processor_affinity_init(processor_affinity); |
| |
| return 0; |
| } |
| |
| static int __init |
| acpi_parse_memory_affinity(struct acpi_subtable_header * header, |
| const unsigned long end) |
| { |
| struct acpi_srat_mem_affinity *memory_affinity; |
| |
| memory_affinity = (struct acpi_srat_mem_affinity *)header; |
| if (!memory_affinity) |
| return -EINVAL; |
| |
| acpi_table_print_srat_entry(header); |
| |
| /* let architecture-dependent part to do it */ |
| acpi_numa_memory_affinity_init(memory_affinity); |
| |
| return 0; |
| } |
| |
| static int __init acpi_parse_srat(struct acpi_table_header *table) |
| { |
| struct acpi_table_srat *srat; |
| |
| if (!table) |
| return -EINVAL; |
| |
| srat = (struct acpi_table_srat *)table; |
| |
| return 0; |
| } |
| |
| int __init |
| acpi_table_parse_srat(enum acpi_srat_type id, |
| acpi_table_entry_handler handler, unsigned int max_entries) |
| { |
| return acpi_table_parse_entries(ACPI_SIG_SRAT, |
| sizeof(struct acpi_table_srat), id, |
| handler, max_entries); |
| } |
| |
| int __init acpi_numa_init(void) |
| { |
| int result; |
| |
| /* SRAT: Static Resource Affinity Table */ |
| if (!acpi_table_parse(ACPI_SIG_SRAT, acpi_parse_srat)) { |
| result = acpi_table_parse_srat(ACPI_SRAT_TYPE_CPU_AFFINITY, |
| acpi_parse_processor_affinity, |
| NR_CPUS); |
| result = acpi_table_parse_srat(ACPI_SRAT_TYPE_MEMORY_AFFINITY, acpi_parse_memory_affinity, NR_NODE_MEMBLKS); // IA64 specific |
| } |
| |
| /* SLIT: System Locality Information Table */ |
| acpi_table_parse(ACPI_SIG_SLIT, acpi_parse_slit); |
| |
| acpi_numa_arch_fixup(); |
| return 0; |
| } |
| |
| int acpi_get_pxm(acpi_handle h) |
| { |
| unsigned long pxm; |
| acpi_status status; |
| acpi_handle handle; |
| acpi_handle phandle = h; |
| |
| do { |
| handle = phandle; |
| status = acpi_evaluate_integer(handle, "_PXM", NULL, &pxm); |
| if (ACPI_SUCCESS(status)) |
| return pxm; |
| status = acpi_get_parent(handle, &phandle); |
| } while (ACPI_SUCCESS(status)); |
| return -1; |
| } |
| EXPORT_SYMBOL(acpi_get_pxm); |
| |
| int acpi_get_node(acpi_handle *handle) |
| { |
| int pxm, node = -1; |
| |
| pxm = acpi_get_pxm(handle); |
| if (pxm >= 0) |
| node = acpi_map_pxm_to_node(pxm); |
| |
| return node; |
| } |
| EXPORT_SYMBOL(acpi_get_node); |