[mirror_ubuntu-bionic-kernel.git] / arch / ia64 / kernel / topology.c

/*
 * This file is subject to the terms and conditions of the GNU General Public
 * License.  See the file "COPYING" in the main directory of this archive
 * for more details.
 *
 * This file contains NUMA specific variables and functions which can
 * be split away from DISCONTIGMEM and are used on NUMA machines with
 * contiguous memory.
 * 		2002/08/07 Erich Focht <efocht@ess.nec.de>
 * Populate cpu entries in sysfs for non-numa systems as well
 *  	Intel Corporation - Ashok Raj
 * 02/27/2006 Zhang, Yanmin
 *	Populate cpu cache entries in sysfs for cpu cache info
 */

#include <linux/config.h>
#include <linux/cpu.h>
#include <linux/kernel.h>
#include <linux/mm.h>
#include <linux/node.h>
#include <linux/init.h>
#include <linux/bootmem.h>
#include <linux/nodemask.h>
#include <linux/notifier.h>
#include <asm/mmzone.h>
#include <asm/numa.h>
#include <asm/cpu.h>

static struct ia64_cpu *sysfs_cpus;

int arch_register_cpu(int num)
{
	struct node *parent = NULL;
	
#ifdef CONFIG_NUMA
	parent = &node_devices[cpu_to_node(num)];
#endif /* CONFIG_NUMA */

#if defined (CONFIG_ACPI) && defined (CONFIG_HOTPLUG_CPU)
	/*
	 * If CPEI cannot be re-targetted, and this is
	 * CPEI target, then dont create the control file
	 */
	if (!can_cpei_retarget() && is_cpu_cpei_target(num))
		sysfs_cpus[num].cpu.no_control = 1;
#endif

	return register_cpu(&sysfs_cpus[num].cpu, num, parent);
}

#ifdef CONFIG_HOTPLUG_CPU

void arch_unregister_cpu(int num)
{
	struct node *parent = NULL;

#ifdef CONFIG_NUMA
	int node = cpu_to_node(num);
	parent = &node_devices[node];
#endif /* CONFIG_NUMA */

	return unregister_cpu(&sysfs_cpus[num].cpu, parent);
}
EXPORT_SYMBOL(arch_register_cpu);
EXPORT_SYMBOL(arch_unregister_cpu);
#endif /*CONFIG_HOTPLUG_CPU*/


static int __init topology_init(void)
{
	int i, err = 0;

#ifdef CONFIG_NUMA
	/*
	 * MCD - Do we want to register all ONLINE nodes, or all POSSIBLE nodes?
	 */
	for_each_online_node(i) {
		if ((err = register_one_node(i)))
			goto out;
	}
#endif

	sysfs_cpus = kzalloc(sizeof(struct ia64_cpu) * NR_CPUS, GFP_KERNEL);
	if (!sysfs_cpus) {
		err = -ENOMEM;
		goto out;
	}

	for_each_present_cpu(i) {
		if((err = arch_register_cpu(i)))
			goto out;
	}
out:
	return err;
}

subsys_initcall(topology_init);


/*
 * Export cpu cache information through sysfs
 */

/*
 *  A bunch of string array to get pretty printing
 */
static const char *cache_types[] = {
	"",			/* not used */
	"Instruction",
	"Data",
	"Unified"	/* unified */
};

static const char *cache_mattrib[]={
	"WriteThrough",
	"WriteBack",
	"",		/* reserved */
	""		/* reserved */
};

struct cache_info {
	pal_cache_config_info_t	cci;
	cpumask_t shared_cpu_map;
	int level;
	int type;
	struct kobject kobj;
};

struct cpu_cache_info {
	struct cache_info *cache_leaves;
	int	num_cache_leaves;
	struct kobject kobj;
};

static struct cpu_cache_info	all_cpu_cache_info[NR_CPUS];
#define LEAF_KOBJECT_PTR(x,y)    (&all_cpu_cache_info[x].cache_leaves[y])

#ifdef CONFIG_SMP
static void cache_shared_cpu_map_setup( unsigned int cpu,
		struct cache_info * this_leaf)
{
	pal_cache_shared_info_t	csi;
	int num_shared, i = 0;
	unsigned int j;

	if (cpu_data(cpu)->threads_per_core <= 1 &&
		cpu_data(cpu)->cores_per_socket <= 1) {
		cpu_set(cpu, this_leaf->shared_cpu_map);
		return;
	}

	if (ia64_pal_cache_shared_info(this_leaf->level,
					this_leaf->type,
					0,
					&csi) != PAL_STATUS_SUCCESS)
		return;

	num_shared = (int) csi.num_shared;
	do {
		for_each_possible_cpu(j)
			if (cpu_data(cpu)->socket_id == cpu_data(j)->socket_id
				&& cpu_data(j)->core_id == csi.log1_cid
				&& cpu_data(j)->thread_id == csi.log1_tid)
				cpu_set(j, this_leaf->shared_cpu_map);

		i++;
	} while (i < num_shared &&
		ia64_pal_cache_shared_info(this_leaf->level,
				this_leaf->type,
				i,
				&csi) == PAL_STATUS_SUCCESS);
}
#else
static void cache_shared_cpu_map_setup(unsigned int cpu,
		struct cache_info * this_leaf)
{
	cpu_set(cpu, this_leaf->shared_cpu_map);
	return;
}
#endif

static ssize_t show_coherency_line_size(struct cache_info *this_leaf,
					char *buf)
{
	return sprintf(buf, "%u\n", 1 << this_leaf->cci.pcci_line_size);
}

static ssize_t show_ways_of_associativity(struct cache_info *this_leaf,
					char *buf)
{
	return sprintf(buf, "%u\n", this_leaf->cci.pcci_assoc);
}

static ssize_t show_attributes(struct cache_info *this_leaf, char *buf)
{
	return sprintf(buf,
			"%s\n",
			cache_mattrib[this_leaf->cci.pcci_cache_attr]);
}

static ssize_t show_size(struct cache_info *this_leaf, char *buf)
{
	return sprintf(buf, "%uK\n", this_leaf->cci.pcci_cache_size / 1024);
}

static ssize_t show_number_of_sets(struct cache_info *this_leaf, char *buf)
{
	unsigned number_of_sets = this_leaf->cci.pcci_cache_size;
	number_of_sets /= this_leaf->cci.pcci_assoc;
	number_of_sets /= 1 << this_leaf->cci.pcci_line_size;

	return sprintf(buf, "%u\n", number_of_sets);
}

static ssize_t show_shared_cpu_map(struct cache_info *this_leaf, char *buf)
{
	ssize_t	len;
	cpumask_t shared_cpu_map;

	cpus_and(shared_cpu_map, this_leaf->shared_cpu_map, cpu_online_map);
	len = cpumask_scnprintf(buf, NR_CPUS+1, shared_cpu_map);
	len += sprintf(buf+len, "\n");
	return len;
}

static ssize_t show_type(struct cache_info *this_leaf, char *buf)
{
	int type = this_leaf->type + this_leaf->cci.pcci_unified;
	return sprintf(buf, "%s\n", cache_types[type]);
}

static ssize_t show_level(struct cache_info *this_leaf, char *buf)
{
	return sprintf(buf, "%u\n", this_leaf->level);
}

struct cache_attr {
	struct attribute attr;
	ssize_t (*show)(struct cache_info *, char *);
	ssize_t (*store)(struct cache_info *, const char *, size_t count);
};

#ifdef define_one_ro
	#undef define_one_ro
#endif
#define define_one_ro(_name) \
	static struct cache_attr _name = \
__ATTR(_name, 0444, show_##_name, NULL)

define_one_ro(level);
define_one_ro(type);
define_one_ro(coherency_line_size);
define_one_ro(ways_of_associativity);
define_one_ro(size);
define_one_ro(number_of_sets);
define_one_ro(shared_cpu_map);
define_one_ro(attributes);

static struct attribute * cache_default_attrs[] = {
	&type.attr,
	&level.attr,
	&coherency_line_size.attr,
	&ways_of_associativity.attr,
	&attributes.attr,
	&size.attr,
	&number_of_sets.attr,
	&shared_cpu_map.attr,
	NULL
};

#define to_object(k) container_of(k, struct cache_info, kobj)
#define to_attr(a) container_of(a, struct cache_attr, attr)

static ssize_t cache_show(struct kobject * kobj, struct attribute * attr, char * buf)
{
	struct cache_attr *fattr = to_attr(attr);
	struct cache_info *this_leaf = to_object(kobj);
	ssize_t ret;

	ret = fattr->show ? fattr->show(this_leaf, buf) : 0;
	return ret;
}

static struct sysfs_ops cache_sysfs_ops = {
	.show   = cache_show
};

static struct kobj_type cache_ktype = {
	.sysfs_ops	= &cache_sysfs_ops,
	.default_attrs	= cache_default_attrs,
};

static struct kobj_type cache_ktype_percpu_entry = {
	.sysfs_ops	= &cache_sysfs_ops,
};

static void __cpuinit cpu_cache_sysfs_exit(unsigned int cpu)
{
	kfree(all_cpu_cache_info[cpu].cache_leaves);
	all_cpu_cache_info[cpu].cache_leaves = NULL;
	all_cpu_cache_info[cpu].num_cache_leaves = 0;
	memset(&all_cpu_cache_info[cpu].kobj, 0, sizeof(struct kobject));
	return;
}

static int __cpuinit cpu_cache_sysfs_init(unsigned int cpu)
{
	u64 i, levels, unique_caches;
	pal_cache_config_info_t cci;
	int j;
	s64 status;
	struct cache_info *this_cache;
	int num_cache_leaves = 0;

	if ((status = ia64_pal_cache_summary(&levels, &unique_caches)) != 0) {
		printk(KERN_ERR "ia64_pal_cache_summary=%ld\n", status);
		return -1;
	}

	this_cache=kzalloc(sizeof(struct cache_info)*unique_caches,
			GFP_KERNEL);
	if (this_cache == NULL)
		return -ENOMEM;

	for (i=0; i < levels; i++) {
		for (j=2; j >0 ; j--) {
			if ((status=ia64_pal_cache_config_info(i,j, &cci)) !=
					PAL_STATUS_SUCCESS)
				continue;

			this_cache[num_cache_leaves].cci = cci;
			this_cache[num_cache_leaves].level = i + 1;
			this_cache[num_cache_leaves].type = j;

			cache_shared_cpu_map_setup(cpu,
					&this_cache[num_cache_leaves]);
			num_cache_leaves ++;
		}
	}

	all_cpu_cache_info[cpu].cache_leaves = this_cache;
	all_cpu_cache_info[cpu].num_cache_leaves = num_cache_leaves;

	memset(&all_cpu_cache_info[cpu].kobj, 0, sizeof(struct kobject));

	return 0;
}

/* Add cache interface for CPU device */
static int __cpuinit cache_add_dev(struct sys_device * sys_dev)
{
	unsigned int cpu = sys_dev->id;
	unsigned long i, j;
	struct cache_info *this_object;
	int retval = 0;
	cpumask_t oldmask;

	if (all_cpu_cache_info[cpu].kobj.parent)
		return 0;

	oldmask = current->cpus_allowed;
	retval = set_cpus_allowed(current, cpumask_of_cpu(cpu));
	if (unlikely(retval))
		return retval;

	retval = cpu_cache_sysfs_init(cpu);
	set_cpus_allowed(current, oldmask);
	if (unlikely(retval < 0))
		return retval;

	all_cpu_cache_info[cpu].kobj.parent = &sys_dev->kobj;
	kobject_set_name(&all_cpu_cache_info[cpu].kobj, "%s", "cache");
	all_cpu_cache_info[cpu].kobj.ktype = &cache_ktype_percpu_entry;
	retval = kobject_register(&all_cpu_cache_info[cpu].kobj);

	for (i = 0; i < all_cpu_cache_info[cpu].num_cache_leaves; i++) {
		this_object = LEAF_KOBJECT_PTR(cpu,i);
		this_object->kobj.parent = &all_cpu_cache_info[cpu].kobj;
		kobject_set_name(&(this_object->kobj), "index%1lu", i);
		this_object->kobj.ktype = &cache_ktype;
		retval = kobject_register(&(this_object->kobj));
		if (unlikely(retval)) {
			for (j = 0; j < i; j++) {
				kobject_unregister(
					&(LEAF_KOBJECT_PTR(cpu,j)->kobj));
			}
			kobject_unregister(&all_cpu_cache_info[cpu].kobj);
			cpu_cache_sysfs_exit(cpu);
			break;
		}
	}
	return retval;
}

/* Remove cache interface for CPU device */
static int __cpuinit cache_remove_dev(struct sys_device * sys_dev)
{
	unsigned int cpu = sys_dev->id;
	unsigned long i;

	for (i = 0; i < all_cpu_cache_info[cpu].num_cache_leaves; i++)
		kobject_unregister(&(LEAF_KOBJECT_PTR(cpu,i)->kobj));

	if (all_cpu_cache_info[cpu].kobj.parent) {
		kobject_unregister(&all_cpu_cache_info[cpu].kobj);
		memset(&all_cpu_cache_info[cpu].kobj,
			0,
			sizeof(struct kobject));
	}

	cpu_cache_sysfs_exit(cpu);

	return 0;
}

/*
 * When a cpu is hot-plugged, do a check and initiate
 * cache kobject if necessary
 */
static int cache_cpu_callback(struct notifier_block *nfb,
		unsigned long action, void *hcpu)
{
	unsigned int cpu = (unsigned long)hcpu;
	struct sys_device *sys_dev;

	sys_dev = get_cpu_sysdev(cpu);
	switch (action) {
	case CPU_ONLINE:
		cache_add_dev(sys_dev);
		break;
	case CPU_DEAD:
		cache_remove_dev(sys_dev);
		break;
	}
	return NOTIFY_OK;
}

static struct notifier_block cache_cpu_notifier =
{
	.notifier_call = cache_cpu_callback
};

static int __cpuinit cache_sysfs_init(void)
{
	int i;

	for_each_online_cpu(i) {
		cache_cpu_callback(&cache_cpu_notifier, CPU_ONLINE,
				(void *)(long)i);
	}

	register_cpu_notifier(&cache_cpu_notifier);

	return 0;
}

device_initcall(cache_sysfs_init);
Commit	Line	Data
1da177e4 LT	1	/*
	2	* This file is subject to the terms and conditions of the GNU General Public
	3	* License. See the file "COPYING" in the main directory of this archive
	4	* for more details.
	5	*
	6	* This file contains NUMA specific variables and functions which can
	7	* be split away from DISCONTIGMEM and are used on NUMA machines with
	8	* contiguous memory.
	9	* 2002/08/07 Erich Focht <efocht@ess.nec.de>
	10	* Populate cpu entries in sysfs for non-numa systems as well
	11	* Intel Corporation - Ashok Raj
f1918005 ZY	12	* 02/27/2006 Zhang, Yanmin
f1918005 ZY	13	* Populate cpu cache entries in sysfs for cpu cache info
1da177e4 LT	14	*/
	15
	16	#include <linux/config.h>
	17	#include <linux/cpu.h>
	18	#include <linux/kernel.h>
	19	#include <linux/mm.h>
	20	#include <linux/node.h>
	21	#include <linux/init.h>
	22	#include <linux/bootmem.h>
	23	#include <linux/nodemask.h>
f1918005	24	#include <linux/notifier.h>
1da177e4 LT	25	#include <asm/mmzone.h>
	26	#include <asm/numa.h>
	27	#include <asm/cpu.h>
	28
1da177e4 LT	29	static struct ia64_cpu *sysfs_cpus;
	30
	31	int arch_register_cpu(int num)
	32	{
	33	struct node *parent = NULL;
	34
	35	#ifdef CONFIG_NUMA
0fc44159	36	parent = &node_devices[cpu_to_node(num)];
1da177e4 LT	37	#endif /* CONFIG_NUMA */
1da177e4 LT	38
b88e9265	39	#if defined (CONFIG_ACPI) && defined (CONFIG_HOTPLUG_CPU)
55e59c51 AR	40	/*
	41	* If CPEI cannot be re-targetted, and this is
	42	* CPEI target, then dont create the control file
	43	*/
	44	if (!can_cpei_retarget() && is_cpu_cpei_target(num))
	45	sysfs_cpus[num].cpu.no_control = 1;
46906c44	46	#endif
55e59c51	47
1da177e4 LT	48	return register_cpu(&sysfs_cpus[num].cpu, num, parent);
	49	}
	50
	51	#ifdef CONFIG_HOTPLUG_CPU
	52
	53	void arch_unregister_cpu(int num)
	54	{
	55	struct node *parent = NULL;
	56
	57	#ifdef CONFIG_NUMA
	58	int node = cpu_to_node(num);
0fc44159	59	parent = &node_devices[node];
1da177e4 LT	60	#endif /* CONFIG_NUMA */
	61
	62	return unregister_cpu(&sysfs_cpus[num].cpu, parent);
	63	}
	64	EXPORT_SYMBOL(arch_register_cpu);
	65	EXPORT_SYMBOL(arch_unregister_cpu);
	66	#endif /CONFIG_HOTPLUG_CPU/
	67
	68
	69	static int __init topology_init(void)
	70	{
	71	int i, err = 0;
	72
	73	#ifdef CONFIG_NUMA
69dcc991 ZY	74	/*
	75	* MCD - Do we want to register all ONLINE nodes, or all POSSIBLE nodes?
	76	*/
	77	for_each_online_node(i) {
0fc44159	78	if ((err = register_one_node(i)))
1da177e4	79	goto out;
69dcc991	80	}
1da177e4 LT	81	#endif
1da177e4 LT	82
69dcc991	83	sysfs_cpus = kzalloc(sizeof(struct ia64_cpu) * NR_CPUS, GFP_KERNEL);
1da177e4 LT	84	if (!sysfs_cpus) {
	85	err = -ENOMEM;
	86	goto out;
	87	}
1da177e4	88
69dcc991	89	for_each_present_cpu(i) {
1da177e4 LT	90	if((err = arch_register_cpu(i)))
1da177e4 LT	91	goto out;
69dcc991	92	}
1da177e4 LT	93	out:
	94	return err;
	95	}
	96
69dcc991	97	subsys_initcall(topology_init);
f1918005 ZY	98
	99
	100	/*
	101	* Export cpu cache information through sysfs
	102	*/
	103
	104	/*
	105	* A bunch of string array to get pretty printing
	106	*/
	107	static const char *cache_types[] = {
	108	"", /* not used */
	109	"Instruction",
	110	"Data",
	111	"Unified" /* unified */
	112	};
	113
	114	static const char *cache_mattrib[]={
	115	"WriteThrough",
	116	"WriteBack",
	117	"", /* reserved */
	118	"" /* reserved */
	119	};
	120
	121	struct cache_info {
	122	pal_cache_config_info_t cci;
	123	cpumask_t shared_cpu_map;
	124	int level;
	125	int type;
	126	struct kobject kobj;
	127	};
	128
	129	struct cpu_cache_info {
	130	struct cache_info *cache_leaves;
	131	int num_cache_leaves;
	132	struct kobject kobj;
	133	};
	134
	135	static struct cpu_cache_info all_cpu_cache_info[NR_CPUS];
	136	#define LEAF_KOBJECT_PTR(x,y) (&all_cpu_cache_info[x].cache_leaves[y])
	137
	138	#ifdef CONFIG_SMP
	139	static void cache_shared_cpu_map_setup( unsigned int cpu,
	140	struct cache_info * this_leaf)
	141	{
	142	pal_cache_shared_info_t csi;
	143	int num_shared, i = 0;
	144	unsigned int j;
	145
	146	if (cpu_data(cpu)->threads_per_core <= 1 &&
	147	cpu_data(cpu)->cores_per_socket <= 1) {
	148	cpu_set(cpu, this_leaf->shared_cpu_map);
	149	return;
	150	}
	151
	152	if (ia64_pal_cache_shared_info(this_leaf->level,
	153	this_leaf->type,
	154	0,
	155	&csi) != PAL_STATUS_SUCCESS)
	156	return;
	157
	158	num_shared = (int) csi.num_shared;
	159	do {
fb1bb34d	160	for_each_possible_cpu(j)
f1918005 ZY	161	if (cpu_data(cpu)->socket_id == cpu_data(j)->socket_id
	162	&& cpu_data(j)->core_id == csi.log1_cid
	163	&& cpu_data(j)->thread_id == csi.log1_tid)
	164	cpu_set(j, this_leaf->shared_cpu_map);
	165
	166	i++;
	167	} while (i < num_shared &&
	168	ia64_pal_cache_shared_info(this_leaf->level,
	169	this_leaf->type,
	170	i,
	171	&csi) == PAL_STATUS_SUCCESS);
	172	}
	173	#else
	174	static void cache_shared_cpu_map_setup(unsigned int cpu,
	175	struct cache_info * this_leaf)
	176	{
	177	cpu_set(cpu, this_leaf->shared_cpu_map);
	178	return;
	179	}
	180	#endif
	181
	182	static ssize_t show_coherency_line_size(struct cache_info *this_leaf,
	183	char *buf)
	184	{
	185	return sprintf(buf, "%u\n", 1 << this_leaf->cci.pcci_line_size);
	186	}
	187
	188	static ssize_t show_ways_of_associativity(struct cache_info *this_leaf,
	189	char *buf)
	190	{
	191	return sprintf(buf, "%u\n", this_leaf->cci.pcci_assoc);
	192	}
	193
	194	static ssize_t show_attributes(struct cache_info this_leaf, char buf)
	195	{
	196	return sprintf(buf,
	197	"%s\n",
	198	cache_mattrib[this_leaf->cci.pcci_cache_attr]);
	199	}
	200
	201	static ssize_t show_size(struct cache_info this_leaf, char buf)
	202	{
	203	return sprintf(buf, "%uK\n", this_leaf->cci.pcci_cache_size / 1024);
	204	}
	205
	206	static ssize_t show_number_of_sets(struct cache_info this_leaf, char buf)
	207	{
	208	unsigned number_of_sets = this_leaf->cci.pcci_cache_size;
	209	number_of_sets /= this_leaf->cci.pcci_assoc;
	210	number_of_sets /= 1 << this_leaf->cci.pcci_line_size;
	211
	212	return sprintf(buf, "%u\n", number_of_sets);
	213	}
	214
	215	static ssize_t show_shared_cpu_map(struct cache_info this_leaf, char buf)
	216	{
	217	ssize_t len;
	218	cpumask_t shared_cpu_map;
	219
	220	cpus_and(shared_cpu_map, this_leaf->shared_cpu_map, cpu_online_map);
	221	len = cpumask_scnprintf(buf, NR_CPUS+1, shared_cpu_map);
	222	len += sprintf(buf+len, "\n");
	223	return len;
	224	}
225
226	static ssize_t show_type(struct cache_info this_leaf, char buf)
227	{
228	int type = this_leaf->type + this_leaf->cci.pcci_unified;
229	return sprintf(buf, "%s\n", cache_types[type]);
230	}
231
232	static ssize_t show_level(struct cache_info this_leaf, char buf)
233	{
234	return sprintf(buf, "%u\n", this_leaf->level);
235	}
236
237	struct cache_attr {
238	struct attribute attr;
239	ssize_t (show)(struct cache_info , char *);
240	ssize_t (store)(struct cache_info , const char *, size_t count);
241	};
242
243	#ifdef define_one_ro
244	#undef define_one_ro
245	#endif
246	#define define_one_ro(_name) \
247	static struct cache_attr _name = \
248	__ATTR(_name, 0444, show_##_name, NULL)
249
250	define_one_ro(level);
251	define_one_ro(type);
252	define_one_ro(coherency_line_size);
253	define_one_ro(ways_of_associativity);
254	define_one_ro(size);
255	define_one_ro(number_of_sets);
256	define_one_ro(shared_cpu_map);
257	define_one_ro(attributes);
258
259	static struct attribute * cache_default_attrs[] = {
260	&type.attr,
261	&level.attr,
262	&coherency_line_size.attr,
263	&ways_of_associativity.attr,
264	&attributes.attr,
265	&size.attr,
266	&number_of_sets.attr,
267	&shared_cpu_map.attr,
268	NULL
269	};
270
271	#define to_object(k) container_of(k, struct cache_info, kobj)
272	#define to_attr(a) container_of(a, struct cache_attr, attr)
273
274	static ssize_t cache_show(struct kobject * kobj, struct attribute * attr, char * buf)
275	{
276	struct cache_attr *fattr = to_attr(attr);
277	struct cache_info *this_leaf = to_object(kobj);
278	ssize_t ret;
279
280	ret = fattr->show ? fattr->show(this_leaf, buf) : 0;
281	return ret;
282	}
283
284	static struct sysfs_ops cache_sysfs_ops = {
285	.show = cache_show
286	};
287
288	static struct kobj_type cache_ktype = {
289	.sysfs_ops = &cache_sysfs_ops,
290	.default_attrs = cache_default_attrs,
291	};
292
293	static struct kobj_type cache_ktype_percpu_entry = {
294	.sysfs_ops = &cache_sysfs_ops,
295	};
296
297	static void __cpuinit cpu_cache_sysfs_exit(unsigned int cpu)
298	{
cbf283c0 JJ	299	kfree(all_cpu_cache_info[cpu].cache_leaves);
cbf283c0 JJ	300	all_cpu_cache_info[cpu].cache_leaves = NULL;
f1918005 ZY	301	all_cpu_cache_info[cpu].num_cache_leaves = 0;
f1918005 ZY	302	memset(&all_cpu_cache_info[cpu].kobj, 0, sizeof(struct kobject));
f1918005 ZY	303	return;
	304	}
	305
	306	static int __cpuinit cpu_cache_sysfs_init(unsigned int cpu)
	307	{
	308	u64 i, levels, unique_caches;
	309	pal_cache_config_info_t cci;
	310	int j;
	311	s64 status;
	312	struct cache_info *this_cache;
	313	int num_cache_leaves = 0;
	314
	315	if ((status = ia64_pal_cache_summary(&levels, &unique_caches)) != 0) {
	316	printk(KERN_ERR "ia64_pal_cache_summary=%ld\n", status);
	317	return -1;
	318	}
	319
	320	this_cache=kzalloc(sizeof(struct cache_info)*unique_caches,
	321	GFP_KERNEL);
	322	if (this_cache == NULL)
	323	return -ENOMEM;
	324
	325	for (i=0; i < levels; i++) {
	326	for (j=2; j >0 ; j--) {
	327	if ((status=ia64_pal_cache_config_info(i,j, &cci)) !=
	328	PAL_STATUS_SUCCESS)
	329	continue;
	330
	331	this_cache[num_cache_leaves].cci = cci;
	332	this_cache[num_cache_leaves].level = i + 1;
	333	this_cache[num_cache_leaves].type = j;
	334
	335	cache_shared_cpu_map_setup(cpu,
	336	&this_cache[num_cache_leaves]);
	337	num_cache_leaves ++;
	338	}
	339	}
	340
	341	all_cpu_cache_info[cpu].cache_leaves = this_cache;
	342	all_cpu_cache_info[cpu].num_cache_leaves = num_cache_leaves;
	343
	344	memset(&all_cpu_cache_info[cpu].kobj, 0, sizeof(struct kobject));
	345
	346	return 0;
	347	}
	348
	349	/* Add cache interface for CPU device */
	350	static int __cpuinit cache_add_dev(struct sys_device * sys_dev)
	351	{
	352	unsigned int cpu = sys_dev->id;
	353	unsigned long i, j;
	354	struct cache_info *this_object;
	355	int retval = 0;
	356	cpumask_t oldmask;
	357
	358	if (all_cpu_cache_info[cpu].kobj.parent)
	359	return 0;
	360
	361	oldmask = current->cpus_allowed;
	362	retval = set_cpus_allowed(current, cpumask_of_cpu(cpu));
	363	if (unlikely(retval))
	364	return retval;
	365
	366	retval = cpu_cache_sysfs_init(cpu);
367	set_cpus_allowed(current, oldmask);
368	if (unlikely(retval < 0))
369	return retval;
370
371	all_cpu_cache_info[cpu].kobj.parent = &sys_dev->kobj;
372	kobject_set_name(&all_cpu_cache_info[cpu].kobj, "%s", "cache");
373	all_cpu_cache_info[cpu].kobj.ktype = &cache_ktype_percpu_entry;
374	retval = kobject_register(&all_cpu_cache_info[cpu].kobj);
375
376	for (i = 0; i < all_cpu_cache_info[cpu].num_cache_leaves; i++) {
377	this_object = LEAF_KOBJECT_PTR(cpu,i);
378	this_object->kobj.parent = &all_cpu_cache_info[cpu].kobj;
379	kobject_set_name(&(this_object->kobj), "index%1lu", i);
380	this_object->kobj.ktype = &cache_ktype;
381	retval = kobject_register(&(this_object->kobj));
382	if (unlikely(retval)) {
383	for (j = 0; j < i; j++) {
384	kobject_unregister(
385	&(LEAF_KOBJECT_PTR(cpu,j)->kobj));
386	}
387	kobject_unregister(&all_cpu_cache_info[cpu].kobj);
388	cpu_cache_sysfs_exit(cpu);
389	break;
390	}
391	}
392	return retval;
393	}
394
395	/* Remove cache interface for CPU device */
396	static int __cpuinit cache_remove_dev(struct sys_device * sys_dev)
397	{
398	unsigned int cpu = sys_dev->id;
399	unsigned long i;
400
401	for (i = 0; i < all_cpu_cache_info[cpu].num_cache_leaves; i++)
402	kobject_unregister(&(LEAF_KOBJECT_PTR(cpu,i)->kobj));
403
404	if (all_cpu_cache_info[cpu].kobj.parent) {
405	kobject_unregister(&all_cpu_cache_info[cpu].kobj);
406	memset(&all_cpu_cache_info[cpu].kobj,
407	0,
408	sizeof(struct kobject));
409	}
410
411	cpu_cache_sysfs_exit(cpu);
412
413	return 0;
414	}
415
416	/*
417	* When a cpu is hot-plugged, do a check and initiate
418	* cache kobject if necessary
419	*/
83d722f7	420	static int cache_cpu_callback(struct notifier_block *nfb,
f1918005 ZY	421	unsigned long action, void *hcpu)
	422	{
	423	unsigned int cpu = (unsigned long)hcpu;
	424	struct sys_device *sys_dev;
	425
	426	sys_dev = get_cpu_sysdev(cpu);
	427	switch (action) {
	428	case CPU_ONLINE:
	429	cache_add_dev(sys_dev);
	430	break;
	431	case CPU_DEAD:
	432	cache_remove_dev(sys_dev);
	433	break;
	434	}
	435	return NOTIFY_OK;
	436	}
	437
	438	static struct notifier_block cache_cpu_notifier =
	439	{
	440	.notifier_call = cache_cpu_callback
	441	};
	442
	443	static int __cpuinit cache_sysfs_init(void)
	444	{
	445	int i;
	446
	447	for_each_online_cpu(i) {
	448	cache_cpu_callback(&cache_cpu_notifier, CPU_ONLINE,
	449	(void *)(long)i);
	450	}
	451
	452	register_cpu_notifier(&cache_cpu_notifier);
	453
	454	return 0;
	455	}
	456
	457	device_initcall(cache_sysfs_init);
	458