345 lines
8.6 KiB
C
345 lines
8.6 KiB
C
/*
|
|
* 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 <linux/numa.h>
|
|
|
|
#define PREFIX "ACPI: "
|
|
|
|
#define ACPI_NUMA 0x80000000
|
|
#define _COMPONENT ACPI_NUMA
|
|
ACPI_MODULE_NAME("numa");
|
|
|
|
static nodemask_t nodes_found_map = NODE_MASK_NONE;
|
|
|
|
/* maps to convert between proximity domain and logical node ID */
|
|
static int pxm_to_node_map[MAX_PXM_DOMAINS]
|
|
= { [0 ... MAX_PXM_DOMAINS - 1] = NUMA_NO_NODE };
|
|
static int node_to_pxm_map[MAX_NUMNODES]
|
|
= { [0 ... MAX_NUMNODES - 1] = PXM_INVAL };
|
|
|
|
unsigned char acpi_srat_revision __initdata;
|
|
|
|
int pxm_to_node(int pxm)
|
|
{
|
|
if (pxm < 0)
|
|
return NUMA_NO_NODE;
|
|
return pxm_to_node_map[pxm];
|
|
}
|
|
|
|
int node_to_pxm(int node)
|
|
{
|
|
if (node < 0)
|
|
return PXM_INVAL;
|
|
return node_to_pxm_map[node];
|
|
}
|
|
|
|
static void __acpi_map_pxm_to_node(int pxm, int node)
|
|
{
|
|
if (pxm_to_node_map[pxm] == NUMA_NO_NODE || node < pxm_to_node_map[pxm])
|
|
pxm_to_node_map[pxm] = node;
|
|
if (node_to_pxm_map[node] == PXM_INVAL || pxm < node_to_pxm_map[node])
|
|
node_to_pxm_map[node] = pxm;
|
|
}
|
|
|
|
int acpi_map_pxm_to_node(int pxm)
|
|
{
|
|
int node = pxm_to_node_map[pxm];
|
|
|
|
if (node == NUMA_NO_NODE) {
|
|
if (nodes_weight(nodes_found_map) >= MAX_NUMNODES)
|
|
return NUMA_NO_NODE;
|
|
node = first_unset_node(nodes_found_map);
|
|
__acpi_map_pxm_to_node(pxm, node);
|
|
node_set(node, nodes_found_map);
|
|
}
|
|
|
|
return node;
|
|
}
|
|
|
|
static 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) in proximity domain %d %s%s%s\n",
|
|
(unsigned long)p->base_address,
|
|
(unsigned long)p->length,
|
|
p->proximity_domain,
|
|
(p->flags & ACPI_SRAT_MEM_ENABLED)?
|
|
"enabled" : "disabled",
|
|
(p->flags & ACPI_SRAT_MEM_HOT_PLUGGABLE)?
|
|
" hot-pluggable" : "",
|
|
(p->flags & ACPI_SRAT_MEM_NON_VOLATILE)?
|
|
" non-volatile" : ""));
|
|
}
|
|
#endif /* ACPI_DEBUG_OUTPUT */
|
|
break;
|
|
|
|
case ACPI_SRAT_TYPE_X2APIC_CPU_AFFINITY:
|
|
#ifdef ACPI_DEBUG_OUTPUT
|
|
{
|
|
struct acpi_srat_x2apic_cpu_affinity *p =
|
|
(struct acpi_srat_x2apic_cpu_affinity *)header;
|
|
ACPI_DEBUG_PRINT((ACPI_DB_INFO,
|
|
"SRAT Processor (x2apicid[0x%08x]) in"
|
|
" proximity domain %d %s\n",
|
|
p->apic_id,
|
|
p->proximity_domain,
|
|
(p->flags & ACPI_SRAT_CPU_ENABLED) ?
|
|
"enabled" : "disabled"));
|
|
}
|
|
#endif /* ACPI_DEBUG_OUTPUT */
|
|
break;
|
|
default:
|
|
printk(KERN_WARNING PREFIX
|
|
"Found unsupported SRAT entry (type = 0x%x)\n",
|
|
header->type);
|
|
break;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* A lot of BIOS fill in 10 (= no distance) everywhere. This messes
|
|
* up the NUMA heuristics which wants the local node to have a smaller
|
|
* distance than the others.
|
|
* Do some quick checks here and only use the SLIT if it passes.
|
|
*/
|
|
static int __init slit_valid(struct acpi_table_slit *slit)
|
|
{
|
|
int i, j;
|
|
int d = slit->locality_count;
|
|
for (i = 0; i < d; i++) {
|
|
for (j = 0; j < d; j++) {
|
|
u8 val = slit->entry[d*i + j];
|
|
if (i == j) {
|
|
if (val != LOCAL_DISTANCE)
|
|
return 0;
|
|
} else if (val <= LOCAL_DISTANCE)
|
|
return 0;
|
|
}
|
|
}
|
|
return 1;
|
|
}
|
|
|
|
static int __init acpi_parse_slit(struct acpi_table_header *table)
|
|
{
|
|
struct acpi_table_slit *slit;
|
|
|
|
if (!table)
|
|
return -EINVAL;
|
|
|
|
slit = (struct acpi_table_slit *)table;
|
|
|
|
if (!slit_valid(slit)) {
|
|
printk(KERN_INFO "ACPI: SLIT table looks invalid. Not used.\n");
|
|
return -EINVAL;
|
|
}
|
|
acpi_numa_slit_init(slit);
|
|
|
|
return 0;
|
|
}
|
|
|
|
void __init __weak
|
|
acpi_numa_x2apic_affinity_init(struct acpi_srat_x2apic_cpu_affinity *pa)
|
|
{
|
|
printk(KERN_WARNING PREFIX
|
|
"Found unsupported x2apic [0x%08x] SRAT entry\n", pa->apic_id);
|
|
return;
|
|
}
|
|
|
|
|
|
static int __init
|
|
acpi_parse_x2apic_affinity(struct acpi_subtable_header *header,
|
|
const unsigned long end)
|
|
{
|
|
struct acpi_srat_x2apic_cpu_affinity *processor_affinity;
|
|
|
|
processor_affinity = (struct acpi_srat_x2apic_cpu_affinity *)header;
|
|
if (!processor_affinity)
|
|
return -EINVAL;
|
|
|
|
acpi_table_print_srat_entry(header);
|
|
|
|
/* let architecture-dependent part to do it */
|
|
acpi_numa_x2apic_affinity_init(processor_affinity);
|
|
|
|
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 __initdata parsed_numa_memblks;
|
|
|
|
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 */
|
|
if (!acpi_numa_memory_affinity_init(memory_affinity))
|
|
parsed_numa_memblks++;
|
|
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;
|
|
acpi_srat_revision = srat->header.revision;
|
|
|
|
/* Real work done in acpi_table_parse_srat below. */
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int __init
|
|
acpi_table_parse_srat(enum acpi_srat_type id,
|
|
acpi_tbl_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 cnt = 0;
|
|
|
|
/*
|
|
* Should not limit number with cpu num that is from NR_CPUS or nr_cpus=
|
|
* SRAT cpu entries could have different order with that in MADT.
|
|
* So go over all cpu entries in SRAT to get apicid to node mapping.
|
|
*/
|
|
|
|
/* SRAT: Static Resource Affinity Table */
|
|
if (!acpi_table_parse(ACPI_SIG_SRAT, acpi_parse_srat)) {
|
|
acpi_table_parse_srat(ACPI_SRAT_TYPE_X2APIC_CPU_AFFINITY,
|
|
acpi_parse_x2apic_affinity, 0);
|
|
acpi_table_parse_srat(ACPI_SRAT_TYPE_CPU_AFFINITY,
|
|
acpi_parse_processor_affinity, 0);
|
|
cnt = acpi_table_parse_srat(ACPI_SRAT_TYPE_MEMORY_AFFINITY,
|
|
acpi_parse_memory_affinity,
|
|
NR_NODE_MEMBLKS);
|
|
}
|
|
|
|
/* SLIT: System Locality Information Table */
|
|
acpi_table_parse(ACPI_SIG_SLIT, acpi_parse_slit);
|
|
|
|
acpi_numa_arch_fixup();
|
|
|
|
if (cnt < 0)
|
|
return cnt;
|
|
else if (!parsed_numa_memblks)
|
|
return -ENOENT;
|
|
return 0;
|
|
}
|
|
|
|
static int acpi_get_pxm(acpi_handle h)
|
|
{
|
|
unsigned long 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;
|
|
}
|
|
|
|
int acpi_get_node(acpi_handle handle)
|
|
{
|
|
int pxm;
|
|
|
|
pxm = acpi_get_pxm(handle);
|
|
if (pxm < 0 || pxm >= MAX_PXM_DOMAINS)
|
|
return NUMA_NO_NODE;
|
|
|
|
return acpi_map_pxm_to_node(pxm);
|
|
}
|
|
EXPORT_SYMBOL(acpi_get_node);
|