[mirror_ubuntu-zesty-kernel.git] / drivers / acpi / numa.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 <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;

/* maps to convert between proximity domain and logical node ID */
static int __cpuinitdata pxm_to_node_map[MAX_PXM_DOMAINS]
				= { [0 ... MAX_PXM_DOMAINS - 1] = NID_INVAL };
static int __cpuinitdata 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];
}

void __acpi_map_pxm_to_node(int pxm, int node)
{
	pxm_to_node_map[pxm] = node;
	node_to_pxm_map[node] = pxm;
}

int 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);
		__acpi_map_pxm_to_node(pxm, node);
		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);
}

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 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;
}

static 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)
{
	/* SRAT: Static Resource Affinity Table */
	if (!acpi_table_parse(ACPI_SIG_SRAT, acpi_parse_srat)) {
		acpi_table_parse_srat(ACPI_SRAT_TYPE_CPU_AFFINITY,
				      acpi_parse_processor_affinity, NR_CPUS);
		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();
	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 <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>
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	38	static nodemask_t nodes_found_map = NODE_MASK_NONE;
762834e8 YG	39
762834e8 YG	40	/* maps to convert between proximity domain and logical node ID */
ae2c6dcf	41	static int __cpuinitdata pxm_to_node_map[MAX_PXM_DOMAINS]
762834e8	42	= { [0 ... MAX_PXM_DOMAINS - 1] = NID_INVAL };
ae2c6dcf	43	static int __cpuinitdata node_to_pxm_map[MAX_NUMNODES]
762834e8 YG	44	= { [0 ... MAX_NUMNODES - 1] = PXM_INVAL };
762834e8 YG	45
f363d16f	46	int pxm_to_node(int pxm)
762834e8 YG	47	{
	48	if (pxm < 0)
	49	return NID_INVAL;
	50	return pxm_to_node_map[pxm];
	51	}
	52
f363d16f	53	int node_to_pxm(int node)
762834e8 YG	54	{
	55	if (node < 0)
	56	return PXM_INVAL;
	57	return node_to_pxm_map[node];
	58	}
	59
3484d798 DR	60	void __acpi_map_pxm_to_node(int pxm, int node)
	61	{
	62	pxm_to_node_map[pxm] = node;
	63	node_to_pxm_map[node] = pxm;
	64	}
	65
8ff6f48d	66	int acpi_map_pxm_to_node(int pxm)
762834e8 YG	67	{
	68	int node = pxm_to_node_map[pxm];
	69
	70	if (node < 0){
	71	if (nodes_weight(nodes_found_map) >= MAX_NUMNODES)
	72	return NID_INVAL;
	73	node = first_unset_node(nodes_found_map);
3484d798	74	__acpi_map_pxm_to_node(pxm, node);
762834e8 YG	75	node_set(node, nodes_found_map);
	76	}
	77
	78	return node;
	79	}
	80
	81	void __cpuinit acpi_unmap_pxm_to_node(int node)
	82	{
	83	int pxm = node_to_pxm_map[node];
	84	pxm_to_node_map[pxm] = NID_INVAL;
	85	node_to_pxm_map[node] = PXM_INVAL;
	86	node_clear(node, nodes_found_map);
	87	}
	88
ae2c6dcf DR	89	static void __init
ae2c6dcf DR	90	acpi_table_print_srat_entry(struct acpi_subtable_header *header)
1da177e4 LT	91	{
1da177e4 LT	92
4be44fcd	93	ACPI_FUNCTION_NAME("acpi_table_print_srat_entry");
1da177e4 LT	94
	95	if (!header)
	96	return;
	97
	98	switch (header->type) {
	99
15a58ed1	100	case ACPI_SRAT_TYPE_CPU_AFFINITY:
1da177e4	101	#ifdef ACPI_DEBUG_OUTPUT
4be44fcd	102	{
15a58ed1 AS	103	struct acpi_srat_cpu_affinity *p =
15a58ed1 AS	104	(struct acpi_srat_cpu_affinity *)header;
4be44fcd LB	105	ACPI_DEBUG_PRINT((ACPI_DB_INFO,
4be44fcd LB	106	"SRAT Processor (id[0x%02x] eid[0x%02x]) in proximity domain %d %s\n",
15a58ed1 AS	107	p->apic_id, p->local_sapic_eid,
	108	p->proximity_domain_lo,
	109	(p->flags & ACPI_SRAT_CPU_ENABLED)?
	110	"enabled" : "disabled"));
4be44fcd LB	111	}
4be44fcd LB	112	#endif /* ACPI_DEBUG_OUTPUT */
1da177e4 LT	113	break;
1da177e4 LT	114
15a58ed1	115	case ACPI_SRAT_TYPE_MEMORY_AFFINITY:
1da177e4	116	#ifdef ACPI_DEBUG_OUTPUT
4be44fcd	117	{
15a58ed1 AS	118	struct acpi_srat_mem_affinity *p =
15a58ed1 AS	119	(struct acpi_srat_mem_affinity *)header;
4be44fcd	120	ACPI_DEBUG_PRINT((ACPI_DB_INFO,
15a58ed1 AS	121	"SRAT Memory (0x%lx length 0x%lx type 0x%x) in proximity domain %d %s%s\n",
	122	(unsigned long)p->base_address,
	123	(unsigned long)p->length,
4be44fcd	124	p->memory_type, p->proximity_domain,
15a58ed1 AS	125	(p->flags & ACPI_SRAT_MEM_ENABLED)?
	126	"enabled" : "disabled",
	127	(p->flags & ACPI_SRAT_MEM_HOT_PLUGGABLE)?
	128	" hot-pluggable" : ""));
4be44fcd LB	129	}
4be44fcd LB	130	#endif /* ACPI_DEBUG_OUTPUT */
1da177e4 LT	131	break;
	132
	133	default:
4be44fcd LB	134	printk(KERN_WARNING PREFIX
	135	"Found unsupported SRAT entry (type = 0x%x)\n",
	136	header->type);
1da177e4 LT	137	break;
	138	}
	139	}
	140
15a58ed1	141	static int __init acpi_parse_slit(struct acpi_table_header *table)
1da177e4	142	{
4be44fcd LB	143	struct acpi_table_slit *slit;
4be44fcd LB	144	u32 localities;
1da177e4	145
15a58ed1	146	if (!table)
1da177e4 LT	147	return -EINVAL;
1da177e4 LT	148
15a58ed1	149	slit = (struct acpi_table_slit *)table;
1da177e4 LT	150
1da177e4 LT	151	/* downcast just for %llu vs %lu for i386/ia64 */
15a58ed1	152	localities = (u32) slit->locality_count;
1da177e4 LT	153
	154	acpi_numa_slit_init(slit);
	155
	156	return 0;
	157	}
	158
1da177e4	159	static int __init
15a58ed1	160	acpi_parse_processor_affinity(struct acpi_subtable_header * header,
4be44fcd	161	const unsigned long end)
1da177e4	162	{
15a58ed1	163	struct acpi_srat_cpu_affinity *processor_affinity;
1da177e4	164
15a58ed1	165	processor_affinity = (struct acpi_srat_cpu_affinity *)header;
1da177e4 LT	166	if (!processor_affinity)
	167	return -EINVAL;
	168
	169	acpi_table_print_srat_entry(header);
	170
	171	/* let architecture-dependent part to do it */
	172	acpi_numa_processor_affinity_init(processor_affinity);
	173
	174	return 0;
	175	}
	176
1da177e4	177	static int __init
15a58ed1	178	acpi_parse_memory_affinity(struct acpi_subtable_header * header,
4be44fcd	179	const unsigned long end)
1da177e4	180	{
15a58ed1	181	struct acpi_srat_mem_affinity *memory_affinity;
1da177e4	182
15a58ed1	183	memory_affinity = (struct acpi_srat_mem_affinity *)header;
1da177e4 LT	184	if (!memory_affinity)
	185	return -EINVAL;
	186
	187	acpi_table_print_srat_entry(header);
	188
	189	/* let architecture-dependent part to do it */
	190	acpi_numa_memory_affinity_init(memory_affinity);
	191
	192	return 0;
	193	}
	194
15a58ed1	195	static int __init acpi_parse_srat(struct acpi_table_header *table)
1da177e4	196	{
4be44fcd	197	struct acpi_table_srat *srat;
1da177e4	198
15a58ed1	199	if (!table)
1da177e4 LT	200	return -EINVAL;
1da177e4 LT	201
15a58ed1	202	srat = (struct acpi_table_srat *)table;
1da177e4 LT	203
	204	return 0;
	205	}
	206
ae2c6dcf	207	static int __init
15a58ed1	208	acpi_table_parse_srat(enum acpi_srat_type id,
5a8765a8	209	acpi_table_entry_handler handler, unsigned int max_entries)
1da177e4	210	{
6eb87fed	211	return acpi_table_parse_entries(ACPI_SIG_SRAT,
4be44fcd LB	212	sizeof(struct acpi_table_srat), id,
4be44fcd LB	213	handler, max_entries);
1da177e4 LT	214	}
1da177e4 LT	215
4be44fcd	216	int __init acpi_numa_init(void)
1da177e4	217	{
1da177e4	218	/* SRAT: Static Resource Affinity Table */
7f8f97c3	219	if (!acpi_table_parse(ACPI_SIG_SRAT, acpi_parse_srat)) {
ae2c6dcf DR	220	acpi_table_parse_srat(ACPI_SRAT_TYPE_CPU_AFFINITY,
	221	acpi_parse_processor_affinity, NR_CPUS);
	222	acpi_table_parse_srat(ACPI_SRAT_TYPE_MEMORY_AFFINITY,
	223	acpi_parse_memory_affinity,
	224	NR_NODE_MEMBLKS);
1da177e4 LT	225	}
	226
	227	/* SLIT: System Locality Information Table */
7f8f97c3	228	acpi_table_parse(ACPI_SIG_SLIT, acpi_parse_slit);
1da177e4 LT	229
	230	acpi_numa_arch_fixup();
	231	return 0;
	232	}
	233
7e81ab9d	234	int acpi_get_pxm(acpi_handle h)
1da177e4 LT	235	{
	236	unsigned long pxm;
	237	acpi_status status;
	238	acpi_handle handle;
	239	acpi_handle phandle = h;
	240
	241	do {
	242	handle = phandle;
	243	status = acpi_evaluate_integer(handle, "_PXM", NULL, &pxm);
	244	if (ACPI_SUCCESS(status))
50dd0969	245	return pxm;
1da177e4	246	status = acpi_get_parent(handle, &phandle);
4be44fcd	247	} while (ACPI_SUCCESS(status));
1da177e4 LT	248	return -1;
	249	}
	250	EXPORT_SYMBOL(acpi_get_pxm);
1e3590e2	251
7e81ab9d	252	int acpi_get_node(acpi_handle *handle)
1e3590e2 YG	253	{
	254	int pxm, node = -1;
	255
1e3590e2 YG	256	pxm = acpi_get_pxm(handle);
	257	if (pxm >= 0)
	258	node = acpi_map_pxm_to_node(pxm);
	259
635227ee	260	return node;
1e3590e2 YG	261	}
1e3590e2 YG	262	EXPORT_SYMBOL(acpi_get_node);