[linux.git] / drivers / acpi / numa.c

/*
 *  acpi_numa.c - ACPI NUMA support
 *
 *  Copyright (C) 2002 Takayoshi Kochi <[email protected]>
 *
 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 *
 *  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 */
int __cpuinitdata pxm_to_node_map[MAX_PXM_DOMAINS]
				= { [0 ... MAX_PXM_DOMAINS - 1] = NID_INVAL };
int __cpuinitdata node_to_pxm_map[MAX_NUMNODES]
				= { [0 ... MAX_NUMNODES - 1] = PXM_INVAL };

int __cpuinit pxm_to_node(int pxm)
{
	if (pxm < 0)
		return NID_INVAL;
	return pxm_to_node_map[pxm];
}

int __cpuinit 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);
Commit	Line	Data
1da177e4 LT	1	/*
	2	* acpi_numa.c - ACPI NUMA support
	3	*
	4	* Copyright (C) 2002 Takayoshi Kochi <[email protected]>
	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>
1da177e4 LT	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>
	33
	34	#define ACPI_NUMA 0x80000000
	35	#define _COMPONENT ACPI_NUMA
f52fd66d	36	ACPI_MODULE_NAME("numa");
1da177e4	37
762834e8 YG	38	static nodemask_t nodes_found_map = NODE_MASK_NONE;
	39	#define PXM_INVAL -1
	40	#define NID_INVAL -1
	41
	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 };
	47
762834e8 YG	48	int __cpuinit pxm_to_node(int pxm)
	49	{
	50	if (pxm < 0)
	51	return NID_INVAL;
	52	return pxm_to_node_map[pxm];
	53	}
	54
	55	int __cpuinit node_to_pxm(int node)
	56	{
	57	if (node < 0)
	58	return PXM_INVAL;
	59	return node_to_pxm_map[node];
	60	}
	61
	62	int __cpuinit acpi_map_pxm_to_node(int pxm)
	63	{
	64	int node = pxm_to_node_map[pxm];
	65
	66	if (node < 0){
	67	if (nodes_weight(nodes_found_map) >= MAX_NUMNODES)
	68	return NID_INVAL;
	69	node = first_unset_node(nodes_found_map);
	70	pxm_to_node_map[pxm] = node;
	71	node_to_pxm_map[node] = pxm;
	72	node_set(node, nodes_found_map);
	73	}
	74
	75	return node;
	76	}
	77
	78	void __cpuinit acpi_unmap_pxm_to_node(int node)
	79	{
	80	int pxm = node_to_pxm_map[node];
	81	pxm_to_node_map[pxm] = NID_INVAL;
	82	node_to_pxm_map[node] = PXM_INVAL;
	83	node_clear(node, nodes_found_map);
	84	}
	85
15a58ed1	86	void __init acpi_table_print_srat_entry(struct acpi_subtable_header * header)
1da177e4 LT	87	{
1da177e4 LT	88
4be44fcd	89	ACPI_FUNCTION_NAME("acpi_table_print_srat_entry");
1da177e4 LT	90
	91	if (!header)
	92	return;
	93
	94	switch (header->type) {
	95
15a58ed1	96	case ACPI_SRAT_TYPE_CPU_AFFINITY:
1da177e4	97	#ifdef ACPI_DEBUG_OUTPUT
4be44fcd	98	{
15a58ed1 AS	99	struct acpi_srat_cpu_affinity *p =
15a58ed1 AS	100	(struct acpi_srat_cpu_affinity *)header;
4be44fcd LB	101	ACPI_DEBUG_PRINT((ACPI_DB_INFO,
4be44fcd LB	102	"SRAT Processor (id[0x%02x] eid[0x%02x]) in proximity domain %d %s\n",
15a58ed1 AS	103	p->apic_id, p->local_sapic_eid,
	104	p->proximity_domain_lo,
	105	(p->flags & ACPI_SRAT_CPU_ENABLED)?
	106	"enabled" : "disabled"));
4be44fcd LB	107	}
4be44fcd LB	108	#endif /* ACPI_DEBUG_OUTPUT */
1da177e4 LT	109	break;
1da177e4 LT	110
15a58ed1	111	case ACPI_SRAT_TYPE_MEMORY_AFFINITY:
1da177e4	112	#ifdef ACPI_DEBUG_OUTPUT
4be44fcd	113	{
15a58ed1 AS	114	struct acpi_srat_mem_affinity *p =
15a58ed1 AS	115	(struct acpi_srat_mem_affinity *)header;
4be44fcd	116	ACPI_DEBUG_PRINT((ACPI_DB_INFO,
15a58ed1 AS	117	"SRAT Memory (0x%lx length 0x%lx type 0x%x) in proximity domain %d %s%s\n",
	118	(unsigned long)p->base_address,
	119	(unsigned long)p->length,
4be44fcd	120	p->memory_type, p->proximity_domain,
15a58ed1 AS	121	(p->flags & ACPI_SRAT_MEM_ENABLED)?
	122	"enabled" : "disabled",
	123	(p->flags & ACPI_SRAT_MEM_HOT_PLUGGABLE)?
	124	" hot-pluggable" : ""));
4be44fcd LB	125	}
4be44fcd LB	126	#endif /* ACPI_DEBUG_OUTPUT */
1da177e4 LT	127	break;
	128
	129	default:
4be44fcd LB	130	printk(KERN_WARNING PREFIX
	131	"Found unsupported SRAT entry (type = 0x%x)\n",
	132	header->type);
1da177e4 LT	133	break;
	134	}
	135	}
	136
15a58ed1	137	static int __init acpi_parse_slit(struct acpi_table_header *table)
1da177e4	138	{
4be44fcd LB	139	struct acpi_table_slit *slit;
4be44fcd LB	140	u32 localities;
1da177e4	141
15a58ed1	142	if (!table)
1da177e4 LT	143	return -EINVAL;
1da177e4 LT	144
15a58ed1	145	slit = (struct acpi_table_slit *)table;
1da177e4 LT	146
1da177e4 LT	147	/* downcast just for %llu vs %lu for i386/ia64 */
15a58ed1	148	localities = (u32) slit->locality_count;
1da177e4 LT	149
	150	acpi_numa_slit_init(slit);
	151
	152	return 0;
	153	}
	154
1da177e4	155	static int __init
15a58ed1	156	acpi_parse_processor_affinity(struct acpi_subtable_header * header,
4be44fcd	157	const unsigned long end)
1da177e4	158	{
15a58ed1	159	struct acpi_srat_cpu_affinity *processor_affinity;
1da177e4	160
15a58ed1	161	processor_affinity = (struct acpi_srat_cpu_affinity *)header;
1da177e4 LT	162	if (!processor_affinity)
	163	return -EINVAL;
	164
	165	acpi_table_print_srat_entry(header);
	166
	167	/* let architecture-dependent part to do it */
	168	acpi_numa_processor_affinity_init(processor_affinity);
	169
	170	return 0;
	171	}
	172
1da177e4	173	static int __init
15a58ed1	174	acpi_parse_memory_affinity(struct acpi_subtable_header * header,
4be44fcd	175	const unsigned long end)
1da177e4	176	{
15a58ed1	177	struct acpi_srat_mem_affinity *memory_affinity;
1da177e4	178
15a58ed1	179	memory_affinity = (struct acpi_srat_mem_affinity *)header;
1da177e4 LT	180	if (!memory_affinity)
	181	return -EINVAL;
	182
	183	acpi_table_print_srat_entry(header);
	184
	185	/* let architecture-dependent part to do it */
	186	acpi_numa_memory_affinity_init(memory_affinity);
	187
	188	return 0;
	189	}
	190
15a58ed1	191	static int __init acpi_parse_srat(struct acpi_table_header *table)
1da177e4	192	{
4be44fcd	193	struct acpi_table_srat *srat;
1da177e4	194
15a58ed1	195	if (!table)
1da177e4 LT	196	return -EINVAL;
1da177e4 LT	197
15a58ed1	198	srat = (struct acpi_table_srat *)table;
1da177e4 LT	199
	200	return 0;
	201	}
	202
1da177e4	203	int __init
15a58ed1	204	acpi_table_parse_srat(enum acpi_srat_type id,
5a8765a8	205	acpi_table_entry_handler handler, unsigned int max_entries)
1da177e4	206	{
6eb87fed	207	return acpi_table_parse_entries(ACPI_SIG_SRAT,
4be44fcd LB	208	sizeof(struct acpi_table_srat), id,
4be44fcd LB	209	handler, max_entries);
1da177e4 LT	210	}
1da177e4 LT	211
4be44fcd	212	int __init acpi_numa_init(void)
1da177e4	213	{
4be44fcd	214	int result;
1da177e4 LT	215
1da177e4 LT	216	/* SRAT: Static Resource Affinity Table */
7f8f97c3	217	if (!acpi_table_parse(ACPI_SIG_SRAT, acpi_parse_srat)) {
15a58ed1	218	result = acpi_table_parse_srat(ACPI_SRAT_TYPE_CPU_AFFINITY,
1da177e4 LT	219	acpi_parse_processor_affinity,
1da177e4 LT	220	NR_CPUS);
15a58ed1	221	result = acpi_table_parse_srat(ACPI_SRAT_TYPE_MEMORY_AFFINITY, acpi_parse_memory_affinity, NR_NODE_MEMBLKS); // IA64 specific
1da177e4 LT	222	}
	223
	224	/* SLIT: System Locality Information Table */
7f8f97c3	225	acpi_table_parse(ACPI_SIG_SLIT, acpi_parse_slit);
1da177e4 LT	226
	227	acpi_numa_arch_fixup();
	228	return 0;
	229	}
	230
7e81ab9d	231	int acpi_get_pxm(acpi_handle h)
1da177e4 LT	232	{
	233	unsigned long pxm;
	234	acpi_status status;
	235	acpi_handle handle;
	236	acpi_handle phandle = h;
	237
	238	do {
	239	handle = phandle;
	240	status = acpi_evaluate_integer(handle, "_PXM", NULL, &pxm);
	241	if (ACPI_SUCCESS(status))
50dd0969	242	return pxm;
1da177e4	243	status = acpi_get_parent(handle, &phandle);
4be44fcd	244	} while (ACPI_SUCCESS(status));
1da177e4 LT	245	return -1;
	246	}
	247	EXPORT_SYMBOL(acpi_get_pxm);
1e3590e2	248
7e81ab9d	249	int acpi_get_node(acpi_handle *handle)
1e3590e2 YG	250	{
	251	int pxm, node = -1;
	252
1e3590e2 YG	253	pxm = acpi_get_pxm(handle);
	254	if (pxm >= 0)
	255	node = acpi_map_pxm_to_node(pxm);
	256
635227ee	257	return node;
1e3590e2 YG	258	}
1e3590e2 YG	259	EXPORT_SYMBOL(acpi_get_node);