[net-next-2.6.git] / drivers / dca / dca-core.c

/*
 * Copyright(c) 2007 - 2009 Intel Corporation. All rights reserved.
 *
 * 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.
 *
 * The full GNU General Public License is included in this distribution in the
 * file called COPYING.
 */

/*
 * This driver supports an interface for DCA clients and providers to meet.
 */

#include <linux/kernel.h>
#include <linux/notifier.h>
#include <linux/device.h>
#include <linux/dca.h>
#include <linux/slab.h>

#define DCA_VERSION "1.12.1"

MODULE_VERSION(DCA_VERSION);
MODULE_LICENSE("GPL");
MODULE_AUTHOR("Intel Corporation");

static DEFINE_SPINLOCK(dca_lock);

static LIST_HEAD(dca_domains);

static struct pci_bus *dca_pci_rc_from_dev(struct device *dev)
{
	struct pci_dev *pdev = to_pci_dev(dev);
	struct pci_bus *bus = pdev->bus;

	while (bus->parent)
		bus = bus->parent;

	return bus;
}

static struct dca_domain *dca_allocate_domain(struct pci_bus *rc)
{
	struct dca_domain *domain;

	domain = kzalloc(sizeof(*domain), GFP_NOWAIT);
	if (!domain)
		return NULL;

	INIT_LIST_HEAD(&domain->dca_providers);
	domain->pci_rc = rc;

	return domain;
}

static void dca_free_domain(struct dca_domain *domain)
{
	list_del(&domain->node);
	kfree(domain);
}

static struct dca_domain *dca_find_domain(struct pci_bus *rc)
{
	struct dca_domain *domain;

	list_for_each_entry(domain, &dca_domains, node)
		if (domain->pci_rc == rc)
			return domain;

	return NULL;
}

static struct dca_domain *dca_get_domain(struct device *dev)
{
	struct pci_bus *rc;
	struct dca_domain *domain;

	rc = dca_pci_rc_from_dev(dev);
	domain = dca_find_domain(rc);

	if (!domain) {
		domain = dca_allocate_domain(rc);
		if (domain)
			list_add(&domain->node, &dca_domains);
	}

	return domain;
}

static struct dca_provider *dca_find_provider_by_dev(struct device *dev)
{
	struct dca_provider *dca;
	struct pci_bus *rc;
	struct dca_domain *domain;

	if (dev) {
		rc = dca_pci_rc_from_dev(dev);
		domain = dca_find_domain(rc);
		if (!domain)
			return NULL;
	} else {
		if (!list_empty(&dca_domains))
			domain = list_first_entry(&dca_domains,
						  struct dca_domain,
						  node);
		else
			return NULL;
	}

	list_for_each_entry(dca, &domain->dca_providers, node)
		if ((!dev) || (dca->ops->dev_managed(dca, dev)))
			return dca;

	return NULL;
}

/**
 * dca_add_requester - add a dca client to the list
 * @dev - the device that wants dca service
 */
int dca_add_requester(struct device *dev)
{
	struct dca_provider *dca;
	int err, slot = -ENODEV;
	unsigned long flags;
	struct pci_bus *pci_rc;
	struct dca_domain *domain;

	if (!dev)
		return -EFAULT;

	spin_lock_irqsave(&dca_lock, flags);

	/* check if the requester has not been added already */
	dca = dca_find_provider_by_dev(dev);
	if (dca) {
		spin_unlock_irqrestore(&dca_lock, flags);
		return -EEXIST;
	}

	pci_rc = dca_pci_rc_from_dev(dev);
	domain = dca_find_domain(pci_rc);
	if (!domain) {
		spin_unlock_irqrestore(&dca_lock, flags);
		return -ENODEV;
	}

	list_for_each_entry(dca, &domain->dca_providers, node) {
		slot = dca->ops->add_requester(dca, dev);
		if (slot >= 0)
			break;
	}

	spin_unlock_irqrestore(&dca_lock, flags);

	if (slot < 0)
		return slot;

	err = dca_sysfs_add_req(dca, dev, slot);
	if (err) {
		spin_lock_irqsave(&dca_lock, flags);
		if (dca == dca_find_provider_by_dev(dev))
			dca->ops->remove_requester(dca, dev);
		spin_unlock_irqrestore(&dca_lock, flags);
		return err;
	}

	return 0;
}
EXPORT_SYMBOL_GPL(dca_add_requester);

/**
 * dca_remove_requester - remove a dca client from the list
 * @dev - the device that wants dca service
 */
int dca_remove_requester(struct device *dev)
{
	struct dca_provider *dca;
	int slot;
	unsigned long flags;

	if (!dev)
		return -EFAULT;

	spin_lock_irqsave(&dca_lock, flags);
	dca = dca_find_provider_by_dev(dev);
	if (!dca) {
		spin_unlock_irqrestore(&dca_lock, flags);
		return -ENODEV;
	}
	slot = dca->ops->remove_requester(dca, dev);
	spin_unlock_irqrestore(&dca_lock, flags);

	if (slot < 0)
		return slot;

	dca_sysfs_remove_req(dca, slot);

	return 0;
}
EXPORT_SYMBOL_GPL(dca_remove_requester);

/**
 * dca_common_get_tag - return the dca tag (serves both new and old api)
 * @dev - the device that wants dca service
 * @cpu - the cpuid as returned by get_cpu()
 */
u8 dca_common_get_tag(struct device *dev, int cpu)
{
	struct dca_provider *dca;
	u8 tag;
	unsigned long flags;

	spin_lock_irqsave(&dca_lock, flags);

	dca = dca_find_provider_by_dev(dev);
	if (!dca) {
		spin_unlock_irqrestore(&dca_lock, flags);
		return -ENODEV;
	}
	tag = dca->ops->get_tag(dca, dev, cpu);

	spin_unlock_irqrestore(&dca_lock, flags);
	return tag;
}

/**
 * dca3_get_tag - return the dca tag to the requester device
 *                for the given cpu (new api)
 * @dev - the device that wants dca service
 * @cpu - the cpuid as returned by get_cpu()
 */
u8 dca3_get_tag(struct device *dev, int cpu)
{
	if (!dev)
		return -EFAULT;

	return dca_common_get_tag(dev, cpu);
}
EXPORT_SYMBOL_GPL(dca3_get_tag);

/**
 * dca_get_tag - return the dca tag for the given cpu (old api)
 * @cpu - the cpuid as returned by get_cpu()
 */
u8 dca_get_tag(int cpu)
{
	struct device *dev = NULL;

	return dca_common_get_tag(dev, cpu);
}
EXPORT_SYMBOL_GPL(dca_get_tag);

/**
 * alloc_dca_provider - get data struct for describing a dca provider
 * @ops - pointer to struct of dca operation function pointers
 * @priv_size - size of extra mem to be added for provider's needs
 */
struct dca_provider *alloc_dca_provider(struct dca_ops *ops, int priv_size)
{
	struct dca_provider *dca;
	int alloc_size;

	alloc_size = (sizeof(*dca) + priv_size);
	dca = kzalloc(alloc_size, GFP_KERNEL);
	if (!dca)
		return NULL;
	dca->ops = ops;

	return dca;
}
EXPORT_SYMBOL_GPL(alloc_dca_provider);

/**
 * free_dca_provider - release the dca provider data struct
 * @ops - pointer to struct of dca operation function pointers
 * @priv_size - size of extra mem to be added for provider's needs
 */
void free_dca_provider(struct dca_provider *dca)
{
	kfree(dca);
}
EXPORT_SYMBOL_GPL(free_dca_provider);

static BLOCKING_NOTIFIER_HEAD(dca_provider_chain);

/**
 * register_dca_provider - register a dca provider
 * @dca - struct created by alloc_dca_provider()
 * @dev - device providing dca services
 */
int register_dca_provider(struct dca_provider *dca, struct device *dev)
{
	int err;
	unsigned long flags;
	struct dca_domain *domain;

	err = dca_sysfs_add_provider(dca, dev);
	if (err)
		return err;

	spin_lock_irqsave(&dca_lock, flags);
	domain = dca_get_domain(dev);
	if (!domain) {
		spin_unlock_irqrestore(&dca_lock, flags);
		return -ENODEV;
	}
	list_add(&dca->node, &domain->dca_providers);
	spin_unlock_irqrestore(&dca_lock, flags);

	blocking_notifier_call_chain(&dca_provider_chain,
				     DCA_PROVIDER_ADD, NULL);
	return 0;
}
EXPORT_SYMBOL_GPL(register_dca_provider);

/**
 * unregister_dca_provider - remove a dca provider
 * @dca - struct created by alloc_dca_provider()
 */
void unregister_dca_provider(struct dca_provider *dca, struct device *dev)
{
	unsigned long flags;
	struct pci_bus *pci_rc;
	struct dca_domain *domain;

	blocking_notifier_call_chain(&dca_provider_chain,
				     DCA_PROVIDER_REMOVE, NULL);

	spin_lock_irqsave(&dca_lock, flags);

	list_del(&dca->node);

	pci_rc = dca_pci_rc_from_dev(dev);
	domain = dca_find_domain(pci_rc);
	if (list_empty(&domain->dca_providers))
		dca_free_domain(domain);

	spin_unlock_irqrestore(&dca_lock, flags);

	dca_sysfs_remove_provider(dca);
}
EXPORT_SYMBOL_GPL(unregister_dca_provider);

/**
 * dca_register_notify - register a client's notifier callback
 */
void dca_register_notify(struct notifier_block *nb)
{
	blocking_notifier_chain_register(&dca_provider_chain, nb);
}
EXPORT_SYMBOL_GPL(dca_register_notify);

/**
 * dca_unregister_notify - remove a client's notifier callback
 */
void dca_unregister_notify(struct notifier_block *nb)
{
	blocking_notifier_chain_unregister(&dca_provider_chain, nb);
}
EXPORT_SYMBOL_GPL(dca_unregister_notify);

static int __init dca_init(void)
{
	pr_info("dca service started, version %s\n", DCA_VERSION);
	return dca_sysfs_init();
}

static void __exit dca_exit(void)
{
	dca_sysfs_exit();
}

arch_initcall(dca_init);
module_exit(dca_exit);
Commit	Line	Data
7589670f	1	/*
211a22ce	2	* Copyright(c) 2007 - 2009 Intel Corporation. All rights reserved.
7589670f SN	3	*
	4	* This program is free software; you can redistribute it and/or modify it
	5	* under the terms of the GNU General Public License as published by the Free
	6	* Software Foundation; either version 2 of the License, or (at your option)
	7	* any later version.
	8	*
	9	* This program is distributed in the hope that it will be useful, but WITHOUT
	10	* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
	11	* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
	12	* more details.
	13	*
	14	* You should have received a copy of the GNU General Public License along with
	15	* this program; if not, write to the Free Software Foundation, Inc., 59
	16	* Temple Place - Suite 330, Boston, MA 02111-1307, USA.
	17	*
	18	* The full GNU General Public License is included in this distribution in the
	19	* file called COPYING.
	20	*/
	21
	22	/*
	23	* This driver supports an interface for DCA clients and providers to meet.
	24	*/
	25
	26	#include <linux/kernel.h>
	27	#include <linux/notifier.h>
	28	#include <linux/device.h>
	29	#include <linux/dca.h>
5a0e3ad6	30	#include <linux/slab.h>
7589670f	31
1a5aeeec	32	#define DCA_VERSION "1.12.1"
7589670f	33
7f1b358a MS	34	MODULE_VERSION(DCA_VERSION);
	35	MODULE_LICENSE("GPL");
	36	MODULE_AUTHOR("Intel Corporation");
7589670f SN	37
	38	static DEFINE_SPINLOCK(dca_lock);
	39
1a5aeeec	40	static LIST_HEAD(dca_domains);
7f1b358a	41
1a5aeeec	42	static struct pci_bus dca_pci_rc_from_dev(struct device dev)
7f1b358a	43	{
1a5aeeec MS	44	struct pci_dev *pdev = to_pci_dev(dev);
1a5aeeec MS	45	struct pci_bus *bus = pdev->bus;
7f1b358a	46
1a5aeeec MS	47	while (bus->parent)
	48	bus = bus->parent;
	49
	50	return bus;
	51	}
	52
	53	static struct dca_domain dca_allocate_domain(struct pci_bus rc)
	54	{
	55	struct dca_domain *domain;
	56
	57	domain = kzalloc(sizeof(*domain), GFP_NOWAIT);
	58	if (!domain)
	59	return NULL;
	60
	61	INIT_LIST_HEAD(&domain->dca_providers);
	62	domain->pci_rc = rc;
	63
	64	return domain;
	65	}
	66
	67	static void dca_free_domain(struct dca_domain *domain)
	68	{
	69	list_del(&domain->node);
	70	kfree(domain);
	71	}
	72
	73	static struct dca_domain dca_find_domain(struct pci_bus rc)
	74	{
	75	struct dca_domain *domain;
	76
	77	list_for_each_entry(domain, &dca_domains, node)
	78	if (domain->pci_rc == rc)
	79	return domain;
	80
	81	return NULL;
	82	}
	83
	84	static struct dca_domain dca_get_domain(struct device dev)
	85	{
	86	struct pci_bus *rc;
	87	struct dca_domain *domain;
	88
	89	rc = dca_pci_rc_from_dev(dev);
	90	domain = dca_find_domain(rc);
	91
	92	if (!domain) {
	93	domain = dca_allocate_domain(rc);
	94	if (domain)
	95	list_add(&domain->node, &dca_domains);
	96	}
	97
	98	return domain;
	99	}
	100
	101	static struct dca_provider dca_find_provider_by_dev(struct device dev)
	102	{
	103	struct dca_provider *dca;
	104	struct pci_bus *rc;
	105	struct dca_domain *domain;
	106
	107	if (dev) {
	108	rc = dca_pci_rc_from_dev(dev);
	109	domain = dca_find_domain(rc);
	110	if (!domain)
111	return NULL;
112	} else {
113	if (!list_empty(&dca_domains))
114	domain = list_first_entry(&dca_domains,
115	struct dca_domain,
116	node);
117	else
118	return NULL;
7f1b358a MS	119	}
7f1b358a MS	120
1a5aeeec MS	121	list_for_each_entry(dca, &domain->dca_providers, node)
	122	if ((!dev) \|\| (dca->ops->dev_managed(dca, dev)))
	123	return dca;
	124
	125	return NULL;
7f1b358a	126	}
7589670f SN	127
	128	/**
	129	* dca_add_requester - add a dca client to the list
	130	* @dev - the device that wants dca service
	131	*/
	132	int dca_add_requester(struct device *dev)
	133	{
7f1b358a MS	134	struct dca_provider *dca;
7f1b358a MS	135	int err, slot = -ENODEV;
eb4400e3	136	unsigned long flags;
1a5aeeec MS	137	struct pci_bus *pci_rc;
1a5aeeec MS	138	struct dca_domain *domain;
7589670f	139
7f1b358a MS	140	if (!dev)
7f1b358a MS	141	return -EFAULT;
7589670f	142
eb4400e3	143	spin_lock_irqsave(&dca_lock, flags);
7f1b358a MS	144
	145	/* check if the requester has not been added already */
	146	dca = dca_find_provider_by_dev(dev);
	147	if (dca) {
eb4400e3	148	spin_unlock_irqrestore(&dca_lock, flags);
7f1b358a MS	149	return -EEXIST;
	150	}
	151
1a5aeeec MS	152	pci_rc = dca_pci_rc_from_dev(dev);
	153	domain = dca_find_domain(pci_rc);
	154	if (!domain) {
	155	spin_unlock_irqrestore(&dca_lock, flags);
	156	return -ENODEV;
	157	}
	158
	159	list_for_each_entry(dca, &domain->dca_providers, node) {
7f1b358a MS	160	slot = dca->ops->add_requester(dca, dev);
	161	if (slot >= 0)
	162	break;
	163	}
eb4400e3 MS	164
	165	spin_unlock_irqrestore(&dca_lock, flags);
	166
	167	if (slot < 0)
7589670f SN	168	return slot;
7589670f SN	169
7f1b358a	170	err = dca_sysfs_add_req(dca, dev, slot);
7589670f	171	if (err) {
eb4400e3 MS	172	spin_lock_irqsave(&dca_lock, flags);
	173	if (dca == dca_find_provider_by_dev(dev))
	174	dca->ops->remove_requester(dca, dev);
	175	spin_unlock_irqrestore(&dca_lock, flags);
7589670f SN	176	return err;
	177	}
	178
	179	return 0;
	180	}
	181	EXPORT_SYMBOL_GPL(dca_add_requester);
	182
	183	/**
	184	* dca_remove_requester - remove a dca client from the list
	185	* @dev - the device that wants dca service
	186	*/
	187	int dca_remove_requester(struct device *dev)
	188	{
7f1b358a	189	struct dca_provider *dca;
7589670f	190	int slot;
eb4400e3	191	unsigned long flags;
7f1b358a MS	192
	193	if (!dev)
	194	return -EFAULT;
7589670f	195
eb4400e3	196	spin_lock_irqsave(&dca_lock, flags);
7f1b358a MS	197	dca = dca_find_provider_by_dev(dev);
7f1b358a MS	198	if (!dca) {
eb4400e3	199	spin_unlock_irqrestore(&dca_lock, flags);
7f1b358a MS	200	return -ENODEV;
	201	}
	202	slot = dca->ops->remove_requester(dca, dev);
eb4400e3 MS	203	spin_unlock_irqrestore(&dca_lock, flags);
	204
	205	if (slot < 0)
7589670f SN	206	return slot;
7589670f SN	207
7f1b358a MS	208	dca_sysfs_remove_req(dca, slot);
7f1b358a MS	209
7589670f SN	210	return 0;
	211	}
	212	EXPORT_SYMBOL_GPL(dca_remove_requester);
	213
	214	/**
7f1b358a MS	215	* dca_common_get_tag - return the dca tag (serves both new and old api)
7f1b358a MS	216	* @dev - the device that wants dca service
7589670f SN	217	* @cpu - the cpuid as returned by get_cpu()
7589670f SN	218	*/
7f1b358a	219	u8 dca_common_get_tag(struct device *dev, int cpu)
7589670f	220	{
7f1b358a MS	221	struct dca_provider *dca;
7f1b358a MS	222	u8 tag;
eb4400e3	223	unsigned long flags;
7f1b358a	224
eb4400e3	225	spin_lock_irqsave(&dca_lock, flags);
7f1b358a MS	226
	227	dca = dca_find_provider_by_dev(dev);
	228	if (!dca) {
eb4400e3	229	spin_unlock_irqrestore(&dca_lock, flags);
7589670f	230	return -ENODEV;
7f1b358a MS	231	}
	232	tag = dca->ops->get_tag(dca, dev, cpu);
	233
eb4400e3	234	spin_unlock_irqrestore(&dca_lock, flags);
7f1b358a MS	235	return tag;
	236	}
	237
	238	/**
	239	* dca3_get_tag - return the dca tag to the requester device
	240	* for the given cpu (new api)
	241	* @dev - the device that wants dca service
	242	* @cpu - the cpuid as returned by get_cpu()
	243	*/
	244	u8 dca3_get_tag(struct device *dev, int cpu)
	245	{
	246	if (!dev)
	247	return -EFAULT;
	248
	249	return dca_common_get_tag(dev, cpu);
	250	}
	251	EXPORT_SYMBOL_GPL(dca3_get_tag);
	252
	253	/**
	254	* dca_get_tag - return the dca tag for the given cpu (old api)
	255	* @cpu - the cpuid as returned by get_cpu()
	256	*/
	257	u8 dca_get_tag(int cpu)
	258	{
	259	struct device *dev = NULL;
	260
	261	return dca_common_get_tag(dev, cpu);
7589670f SN	262	}
	263	EXPORT_SYMBOL_GPL(dca_get_tag);
	264
	265	/**
	266	* alloc_dca_provider - get data struct for describing a dca provider
	267	* @ops - pointer to struct of dca operation function pointers
	268	* @priv_size - size of extra mem to be added for provider's needs
	269	*/
	270	struct dca_provider alloc_dca_provider(struct dca_ops ops, int priv_size)
	271	{
	272	struct dca_provider *dca;
	273	int alloc_size;
	274
	275	alloc_size = (sizeof(*dca) + priv_size);
	276	dca = kzalloc(alloc_size, GFP_KERNEL);
	277	if (!dca)
	278	return NULL;
	279	dca->ops = ops;
	280
	281	return dca;
	282	}
	283	EXPORT_SYMBOL_GPL(alloc_dca_provider);
	284
	285	/**
	286	* free_dca_provider - release the dca provider data struct
	287	* @ops - pointer to struct of dca operation function pointers
	288	* @priv_size - size of extra mem to be added for provider's needs
	289	*/
	290	void free_dca_provider(struct dca_provider *dca)
	291	{
	292	kfree(dca);
	293	}
	294	EXPORT_SYMBOL_GPL(free_dca_provider);
	295
	296	static BLOCKING_NOTIFIER_HEAD(dca_provider_chain);
	297
	298	/**
	299	* register_dca_provider - register a dca provider
	300	* @dca - struct created by alloc_dca_provider()
	301	* @dev - device providing dca services
	302	*/
	303	int register_dca_provider(struct dca_provider dca, struct device dev)
	304	{
	305	int err;
eb4400e3	306	unsigned long flags;
1a5aeeec	307	struct dca_domain *domain;
7589670f	308
7589670f SN	309	err = dca_sysfs_add_provider(dca, dev);
	310	if (err)
	311	return err;
eb4400e3 MS	312
eb4400e3 MS	313	spin_lock_irqsave(&dca_lock, flags);
1a5aeeec MS	314	domain = dca_get_domain(dev);
	315	if (!domain) {
	316	spin_unlock_irqrestore(&dca_lock, flags);
	317	return -ENODEV;
	318	}
	319	list_add(&dca->node, &domain->dca_providers);
eb4400e3 MS	320	spin_unlock_irqrestore(&dca_lock, flags);
eb4400e3 MS	321
7589670f SN	322	blocking_notifier_call_chain(&dca_provider_chain,
	323	DCA_PROVIDER_ADD, NULL);
	324	return 0;
	325	}
	326	EXPORT_SYMBOL_GPL(register_dca_provider);
	327
	328	/**
	329	* unregister_dca_provider - remove a dca provider
	330	* @dca - struct created by alloc_dca_provider()
	331	*/
1a5aeeec	332	void unregister_dca_provider(struct dca_provider dca, struct device dev)
7589670f	333	{
eb4400e3	334	unsigned long flags;
1a5aeeec MS	335	struct pci_bus *pci_rc;
1a5aeeec MS	336	struct dca_domain *domain;
eb4400e3	337
7589670f SN	338	blocking_notifier_call_chain(&dca_provider_chain,
7589670f SN	339	DCA_PROVIDER_REMOVE, NULL);
eb4400e3 MS	340
eb4400e3 MS	341	spin_lock_irqsave(&dca_lock, flags);
1a5aeeec	342
7f1b358a	343	list_del(&dca->node);
1a5aeeec MS	344
	345	pci_rc = dca_pci_rc_from_dev(dev);
	346	domain = dca_find_domain(pci_rc);
	347	if (list_empty(&domain->dca_providers))
	348	dca_free_domain(domain);
	349
eb4400e3 MS	350	spin_unlock_irqrestore(&dca_lock, flags);
eb4400e3 MS	351
7589670f SN	352	dca_sysfs_remove_provider(dca);
	353	}
	354	EXPORT_SYMBOL_GPL(unregister_dca_provider);
	355
	356	/**
	357	* dca_register_notify - register a client's notifier callback
	358	*/
	359	void dca_register_notify(struct notifier_block *nb)
	360	{
	361	blocking_notifier_chain_register(&dca_provider_chain, nb);
	362	}
	363	EXPORT_SYMBOL_GPL(dca_register_notify);
	364
	365	/**
	366	* dca_unregister_notify - remove a client's notifier callback
	367	*/
	368	void dca_unregister_notify(struct notifier_block *nb)
	369	{
	370	blocking_notifier_chain_unregister(&dca_provider_chain, nb);
	371	}
	372	EXPORT_SYMBOL_GPL(dca_unregister_notify);
	373
	374	static int __init dca_init(void)
	375	{
084dac53	376	pr_info("dca service started, version %s\n", DCA_VERSION);
7589670f SN	377	return dca_sysfs_init();
	378	}
	379
	380	static void __exit dca_exit(void)
	381	{
	382	dca_sysfs_exit();
	383	}
	384
652afc27	385	arch_initcall(dca_init);
7589670f SN	386	module_exit(dca_exit);
7589670f SN	387