[linux-2.6-block.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.
 *
 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 *
 */

#define pr_fmt(fmt) "ACPI: " fmt

#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>
#include <linux/nodemask.h>
#include <linux/topology.h>

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;

	if (pxm < 0 || pxm >= MAX_PXM_DOMAINS)
		return NUMA_NO_NODE;

	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;
}

/**
 * acpi_map_pxm_to_online_node - Map proximity ID to online node
 * @pxm: ACPI proximity ID
 *
 * This is similar to acpi_map_pxm_to_node(), but always returns an online
 * node.  When the mapped node from a given proximity ID is offline, it
 * looks up the node distance table and returns the nearest online node.
 *
 * ACPI device drivers, which are called after the NUMA initialization has
 * completed in the kernel, can call this interface to obtain their device
 * NUMA topology from ACPI tables.  Such drivers do not have to deal with
 * offline nodes.  A node may be offline when a device proximity ID is
 * unique, SRAT memory entry does not exist, or NUMA is disabled, ex.
 * "numa=off" on x86.
 */
int acpi_map_pxm_to_online_node(int pxm)
{
	int node, n, dist, min_dist;

	node = acpi_map_pxm_to_node(pxm);

	if (node == NUMA_NO_NODE)
		node = 0;

	if (!node_online(node)) {
		min_dist = INT_MAX;
		for_each_online_node(n) {
			dist = node_distance(node, n);
			if (dist < min_dist) {
				min_dist = dist;
				node = n;
			}
		}
	}

	return node;
}
EXPORT_SYMBOL(acpi_map_pxm_to_online_node);

static void __init
acpi_table_print_srat_entry(struct acpi_subtable_header *header)
{
	switch (header->type) {
	case ACPI_SRAT_TYPE_CPU_AFFINITY:
		{
			struct acpi_srat_cpu_affinity *p =
			    (struct acpi_srat_cpu_affinity *)header;
			pr_debug("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");
		}
		break;

	case ACPI_SRAT_TYPE_MEMORY_AFFINITY:
		{
			struct acpi_srat_mem_affinity *p =
			    (struct acpi_srat_mem_affinity *)header;
			pr_debug("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" : "");
		}
		break;

	case ACPI_SRAT_TYPE_X2APIC_CPU_AFFINITY:
		{
			struct acpi_srat_x2apic_cpu_affinity *p =
			    (struct acpi_srat_x2apic_cpu_affinity *)header;
			pr_debug("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");
		}
		break;

	default:
		pr_warn("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;
}

#if defined(CONFIG_X86) || defined(CONFIG_ARM64)
/*
 * Callback for SLIT parsing.  pxm_to_node() returns NUMA_NO_NODE for
 * I/O localities since SRAT does not list them.  I/O localities are
 * not supported at this point.
 */
void __init acpi_numa_slit_init(struct acpi_table_slit *slit)
{
	int i, j;

	for (i = 0; i < slit->locality_count; i++) {
		const int from_node = pxm_to_node(i);

		if (from_node == NUMA_NO_NODE)
			continue;

		for (j = 0; j < slit->locality_count; j++) {
			const int to_node = pxm_to_node(j);

			if (to_node == NUMA_NO_NODE)
				continue;

			numa_set_distance(from_node, to_node,
				slit->entry[slit->locality_count * i + j]);
		}
	}
}
#endif /* defined(CONFIG_X86) || defined (CONFIG_ARM64) */

static int __init acpi_parse_slit(struct acpi_table_header *table)
{
	struct acpi_table_slit *slit = (struct acpi_table_slit *)table;

	if (!slit_valid(slit)) {
		pr_info("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)
{
	pr_warn("Found unsupported x2apic [0x%08x] SRAT entry\n", pa->apic_id);
}

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 = (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)) {
		struct acpi_subtable_proc srat_proc[2];

		memset(srat_proc, 0, sizeof(srat_proc));
		srat_proc[0].id = ACPI_SRAT_TYPE_CPU_AFFINITY;
		srat_proc[0].handler = acpi_parse_processor_affinity;
		srat_proc[1].id = ACPI_SRAT_TYPE_X2APIC_CPU_AFFINITY;
		srat_proc[1].handler = acpi_parse_x2apic_affinity;

		acpi_table_parse_entries_array(ACPI_SIG_SRAT,
					sizeof(struct acpi_table_srat),
					srat_proc, ARRAY_SIZE(srat_proc), 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);

	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);

	return acpi_map_pxm_to_node(pxm);
}
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	*
1da177e4 LT	18	* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
	19	*
	20	*/
ac906a6d HG	21
	22	#define pr_fmt(fmt) "ACPI: " fmt
	23
1da177e4	24	#include <linux/module.h>
1da177e4 LT	25	#include <linux/init.h>
	26	#include <linux/kernel.h>
	27	#include <linux/types.h>
	28	#include <linux/errno.h>
	29	#include <linux/acpi.h>
b552a8c5	30	#include <linux/numa.h>
99759869 TK	31	#include <linux/nodemask.h>
99759869 TK	32	#include <linux/topology.h>
1da177e4	33
762834e8	34	static nodemask_t nodes_found_map = NODE_MASK_NONE;
762834e8 YG	35
762834e8 YG	36	/* maps to convert between proximity domain and logical node ID */
ffada891	37	static int pxm_to_node_map[MAX_PXM_DOMAINS]
b552a8c5	38	= { [0 ... MAX_PXM_DOMAINS - 1] = NUMA_NO_NODE };
ffada891	39	static int node_to_pxm_map[MAX_NUMNODES]
b552a8c5	40	= { [0 ... MAX_NUMNODES - 1] = PXM_INVAL };
762834e8	41
8df0eb7c KG	42	unsigned char acpi_srat_revision __initdata;
8df0eb7c KG	43
f363d16f	44	int pxm_to_node(int pxm)
762834e8 YG	45	{
762834e8 YG	46	if (pxm < 0)
b552a8c5	47	return NUMA_NO_NODE;
762834e8 YG	48	return pxm_to_node_map[pxm];
	49	}
	50
f363d16f	51	int node_to_pxm(int node)
762834e8 YG	52	{
	53	if (node < 0)
	54	return PXM_INVAL;
	55	return node_to_pxm_map[node];
	56	}
	57
d79ed248	58	static void __acpi_map_pxm_to_node(int pxm, int node)
3484d798	59	{
0f9b75ef DR	60	if (pxm_to_node_map[pxm] == NUMA_NO_NODE \|\| node < pxm_to_node_map[pxm])
	61	pxm_to_node_map[pxm] = node;
	62	if (node_to_pxm_map[node] == PXM_INVAL \|\| pxm < node_to_pxm_map[node])
	63	node_to_pxm_map[node] = pxm;
3484d798 DR	64	}
3484d798 DR	65
8ff6f48d	66	int acpi_map_pxm_to_node(int pxm)
762834e8	67	{
99759869 TK	68	int node;
	69
	70	if (pxm < 0 \|\| pxm >= MAX_PXM_DOMAINS)
	71	return NUMA_NO_NODE;
	72
	73	node = pxm_to_node_map[pxm];
762834e8	74
1bb25df0	75	if (node == NUMA_NO_NODE) {
762834e8	76	if (nodes_weight(nodes_found_map) >= MAX_NUMNODES)
b552a8c5	77	return NUMA_NO_NODE;
762834e8	78	node = first_unset_node(nodes_found_map);
3484d798	79	__acpi_map_pxm_to_node(pxm, node);
762834e8 YG	80	node_set(node, nodes_found_map);
	81	}
	82
	83	return node;
	84	}
	85
99759869 TK	86	/**
	87	* acpi_map_pxm_to_online_node - Map proximity ID to online node
	88	* @pxm: ACPI proximity ID
	89	*
	90	* This is similar to acpi_map_pxm_to_node(), but always returns an online
	91	* node. When the mapped node from a given proximity ID is offline, it
	92	* looks up the node distance table and returns the nearest online node.
	93	*
	94	* ACPI device drivers, which are called after the NUMA initialization has
	95	* completed in the kernel, can call this interface to obtain their device
	96	* NUMA topology from ACPI tables. Such drivers do not have to deal with
	97	* offline nodes. A node may be offline when a device proximity ID is
	98	* unique, SRAT memory entry does not exist, or NUMA is disabled, ex.
	99	* "numa=off" on x86.
	100	*/
	101	int acpi_map_pxm_to_online_node(int pxm)
	102	{
	103	int node, n, dist, min_dist;
	104
	105	node = acpi_map_pxm_to_node(pxm);
	106
	107	if (node == NUMA_NO_NODE)
	108	node = 0;
	109
	110	if (!node_online(node)) {
	111	min_dist = INT_MAX;
	112	for_each_online_node(n) {
	113	dist = node_distance(node, n);
	114	if (dist < min_dist) {
	115	min_dist = dist;
	116	node = n;
	117	}
	118	}
	119	}
	120
	121	return node;
	122	}
	123	EXPORT_SYMBOL(acpi_map_pxm_to_online_node);
	124
ae2c6dcf DR	125	static void __init
ae2c6dcf DR	126	acpi_table_print_srat_entry(struct acpi_subtable_header *header)
1da177e4	127	{
1da177e4	128	switch (header->type) {
15a58ed1	129	case ACPI_SRAT_TYPE_CPU_AFFINITY:
4be44fcd	130	{
15a58ed1 AS	131	struct acpi_srat_cpu_affinity *p =
15a58ed1 AS	132	(struct acpi_srat_cpu_affinity *)header;
3dda4481 HG	133	pr_debug("SRAT Processor (id[0x%02x] eid[0x%02x]) in proximity domain %d %s\n",
	134	p->apic_id, p->local_sapic_eid,
	135	p->proximity_domain_lo,
	136	(p->flags & ACPI_SRAT_CPU_ENABLED) ?
	137	"enabled" : "disabled");
4be44fcd	138	}
1da177e4 LT	139	break;
1da177e4 LT	140
15a58ed1	141	case ACPI_SRAT_TYPE_MEMORY_AFFINITY:
4be44fcd	142	{
15a58ed1 AS	143	struct acpi_srat_mem_affinity *p =
15a58ed1 AS	144	(struct acpi_srat_mem_affinity *)header;
3dda4481 HG	145	pr_debug("SRAT Memory (0x%lx length 0x%lx) in proximity domain %d %s%s%s\n",
	146	(unsigned long)p->base_address,
	147	(unsigned long)p->length,
	148	p->proximity_domain,
	149	(p->flags & ACPI_SRAT_MEM_ENABLED) ?
	150	"enabled" : "disabled",
	151	(p->flags & ACPI_SRAT_MEM_HOT_PLUGGABLE) ?
	152	" hot-pluggable" : "",
	153	(p->flags & ACPI_SRAT_MEM_NON_VOLATILE) ?
	154	" non-volatile" : "");
4be44fcd	155	}
1da177e4 LT	156	break;
1da177e4 LT	157
7237d3de	158	case ACPI_SRAT_TYPE_X2APIC_CPU_AFFINITY:
7237d3de SS	159	{
	160	struct acpi_srat_x2apic_cpu_affinity *p =
	161	(struct acpi_srat_x2apic_cpu_affinity *)header;
3dda4481 HG	162	pr_debug("SRAT Processor (x2apicid[0x%08x]) in proximity domain %d %s\n",
	163	p->apic_id,
	164	p->proximity_domain,
	165	(p->flags & ACPI_SRAT_CPU_ENABLED) ?
	166	"enabled" : "disabled");
7237d3de	167	}
7237d3de	168	break;
3dda4481	169
1da177e4	170	default:
ac906a6d HG	171	pr_warn("Found unsupported SRAT entry (type = 0x%x)\n",
ac906a6d HG	172	header->type);
1da177e4 LT	173	break;
	174	}
	175	}
	176
39b8931b FY	177	/*
	178	* A lot of BIOS fill in 10 (= no distance) everywhere. This messes
	179	* up the NUMA heuristics which wants the local node to have a smaller
	180	* distance than the others.
	181	* Do some quick checks here and only use the SLIT if it passes.
	182	*/
40e31856	183	static int __init slit_valid(struct acpi_table_slit *slit)
39b8931b FY	184	{
	185	int i, j;
	186	int d = slit->locality_count;
	187	for (i = 0; i < d; i++) {
	188	for (j = 0; j < d; j++) {
	189	u8 val = slit->entry[d*i + j];
	190	if (i == j) {
	191	if (val != LOCAL_DISTANCE)
	192	return 0;
	193	} else if (val <= LOCAL_DISTANCE)
	194	return 0;
	195	}
	196	}
	197	return 1;
	198	}
	199
6525afdf HG	200	#if defined(CONFIG_X86) \|\| defined(CONFIG_ARM64)
	201	/*
	202	* Callback for SLIT parsing. pxm_to_node() returns NUMA_NO_NODE for
	203	* I/O localities since SRAT does not list them. I/O localities are
	204	* not supported at this point.
	205	*/
	206	void __init acpi_numa_slit_init(struct acpi_table_slit *slit)
	207	{
	208	int i, j;
	209
	210	for (i = 0; i < slit->locality_count; i++) {
	211	const int from_node = pxm_to_node(i);
	212
	213	if (from_node == NUMA_NO_NODE)
	214	continue;
	215
	216	for (j = 0; j < slit->locality_count; j++) {
	217	const int to_node = pxm_to_node(j);
	218
	219	if (to_node == NUMA_NO_NODE)
	220	continue;
	221
	222	numa_set_distance(from_node, to_node,
	223	slit->entry[slit->locality_count * i + j]);
	224	}
	225	}
	226	}
	227	#endif /* defined(CONFIG_X86) \|\| defined (CONFIG_ARM64) */
	228
15a58ed1	229	static int __init acpi_parse_slit(struct acpi_table_header *table)
1da177e4	230	{
2fad9308	231	struct acpi_table_slit slit = (struct acpi_table_slit )table;
1da177e4	232
39b8931b	233	if (!slit_valid(slit)) {
ac906a6d	234	pr_info("SLIT table looks invalid. Not used.\n");
39b8931b FY	235	return -EINVAL;
39b8931b FY	236	}
1da177e4 LT	237	acpi_numa_slit_init(slit);
	238
	239	return 0;
	240	}
	241
beffbe54	242	void __init __weak
7237d3de SS	243	acpi_numa_x2apic_affinity_init(struct acpi_srat_x2apic_cpu_affinity *pa)
7237d3de SS	244	{
ac906a6d	245	pr_warn("Found unsupported x2apic [0x%08x] SRAT entry\n", pa->apic_id);
7237d3de SS	246	}
7237d3de SS	247
7237d3de SS	248	static int __init
	249	acpi_parse_x2apic_affinity(struct acpi_subtable_header *header,
	250	const unsigned long end)
	251	{
	252	struct acpi_srat_x2apic_cpu_affinity *processor_affinity;
	253
	254	processor_affinity = (struct acpi_srat_x2apic_cpu_affinity *)header;
	255	if (!processor_affinity)
	256	return -EINVAL;
	257
	258	acpi_table_print_srat_entry(header);
	259
	260	/* let architecture-dependent part to do it */
	261	acpi_numa_x2apic_affinity_init(processor_affinity);
	262
	263	return 0;
	264	}
	265
1da177e4	266	static int __init
7237d3de	267	acpi_parse_processor_affinity(struct acpi_subtable_header *header,
4be44fcd	268	const unsigned long end)
1da177e4	269	{
15a58ed1	270	struct acpi_srat_cpu_affinity *processor_affinity;
1da177e4	271
15a58ed1	272	processor_affinity = (struct acpi_srat_cpu_affinity *)header;
1da177e4 LT	273	if (!processor_affinity)
	274	return -EINVAL;
	275
	276	acpi_table_print_srat_entry(header);
	277
	278	/* let architecture-dependent part to do it */
	279	acpi_numa_processor_affinity_init(processor_affinity);
	280
	281	return 0;
	282	}
	283
095adbb6 TR	284	static int __initdata parsed_numa_memblks;
095adbb6 TR	285
1da177e4	286	static int __init
15a58ed1	287	acpi_parse_memory_affinity(struct acpi_subtable_header * header,
4be44fcd	288	const unsigned long end)
1da177e4	289	{
15a58ed1	290	struct acpi_srat_mem_affinity *memory_affinity;
1da177e4	291
15a58ed1	292	memory_affinity = (struct acpi_srat_mem_affinity *)header;
1da177e4 LT	293	if (!memory_affinity)
	294	return -EINVAL;
	295
	296	acpi_table_print_srat_entry(header);
	297
	298	/* let architecture-dependent part to do it */
095adbb6 TR	299	if (!acpi_numa_memory_affinity_init(memory_affinity))
095adbb6 TR	300	parsed_numa_memblks++;
1da177e4 LT	301	return 0;
	302	}
	303
15a58ed1	304	static int __init acpi_parse_srat(struct acpi_table_header *table)
1da177e4	305	{
2fad9308	306	struct acpi_table_srat srat = (struct acpi_table_srat )table;
1da177e4	307
8df0eb7c KG	308	acpi_srat_revision = srat->header.revision;
8df0eb7c KG	309
cfa806f0	310	/* Real work done in acpi_table_parse_srat below. */
1da177e4 LT	311
	312	return 0;
	313	}
	314
ae2c6dcf	315	static int __init
15a58ed1	316	acpi_table_parse_srat(enum acpi_srat_type id,
b43e1065	317	acpi_tbl_entry_handler handler, unsigned int max_entries)
1da177e4	318	{
6eb87fed	319	return acpi_table_parse_entries(ACPI_SIG_SRAT,
4be44fcd LB	320	sizeof(struct acpi_table_srat), id,
4be44fcd LB	321	handler, max_entries);
1da177e4 LT	322	}
1da177e4 LT	323
20e6926d	324	int __init acpi_numa_init(void)
e8d19552	325	{
20e6926d YL	326	int cnt = 0;
20e6926d YL	327
d3bd0588 YL	328	/*
	329	* Should not limit number with cpu num that is from NR_CPUS or nr_cpus=
	330	* SRAT cpu entries could have different order with that in MADT.
	331	* So go over all cpu entries in SRAT to get apicid to node mapping.
	332	*/
8716273c	333
1da177e4	334	/* SRAT: Static Resource Affinity Table */
7f8f97c3	335	if (!acpi_table_parse(ACPI_SIG_SRAT, acpi_parse_srat)) {
702b07fc LA	336	struct acpi_subtable_proc srat_proc[2];
	337
	338	memset(srat_proc, 0, sizeof(srat_proc));
	339	srat_proc[0].id = ACPI_SRAT_TYPE_CPU_AFFINITY;
	340	srat_proc[0].handler = acpi_parse_processor_affinity;
	341	srat_proc[1].id = ACPI_SRAT_TYPE_X2APIC_CPU_AFFINITY;
	342	srat_proc[1].handler = acpi_parse_x2apic_affinity;
	343
	344	acpi_table_parse_entries_array(ACPI_SIG_SRAT,
	345	sizeof(struct acpi_table_srat),
	346	srat_proc, ARRAY_SIZE(srat_proc), 0);
	347
20e6926d YL	348	cnt = acpi_table_parse_srat(ACPI_SRAT_TYPE_MEMORY_AFFINITY,
	349	acpi_parse_memory_affinity,
	350	NR_NODE_MEMBLKS);
1da177e4 LT	351	}
	352
	353	/* SLIT: System Locality Information Table */
7f8f97c3	354	acpi_table_parse(ACPI_SIG_SLIT, acpi_parse_slit);
1da177e4	355
20e6926d YL	356	if (cnt < 0)
20e6926d YL	357	return cnt;
095adbb6	358	else if (!parsed_numa_memblks)
f3946fb6	359	return -ENOENT;
940fed2e	360	return 0;
1da177e4 LT	361	}
1da177e4 LT	362
d79ed248	363	static int acpi_get_pxm(acpi_handle h)
1da177e4	364	{
27663c58	365	unsigned long long pxm;
1da177e4 LT	366	acpi_status status;
	367	acpi_handle handle;
	368	acpi_handle phandle = h;
	369
	370	do {
	371	handle = phandle;
	372	status = acpi_evaluate_integer(handle, "_PXM", NULL, &pxm);
	373	if (ACPI_SUCCESS(status))
50dd0969	374	return pxm;
1da177e4	375	status = acpi_get_parent(handle, &phandle);
4be44fcd	376	} while (ACPI_SUCCESS(status));
1da177e4 LT	377	return -1;
1da177e4 LT	378	}
1e3590e2	379
486c79b5	380	int acpi_get_node(acpi_handle handle)
1e3590e2	381	{
962fe9c9	382	int pxm;
1e3590e2	383
1e3590e2	384	pxm = acpi_get_pxm(handle);
1e3590e2	385
962fe9c9	386	return acpi_map_pxm_to_node(pxm);
1e3590e2 YG	387	}
1e3590e2 YG	388	EXPORT_SYMBOL(acpi_get_node);