[net-next-2.6.git] / drivers / scsi / libsas / sas_discover.c

/*
 * Serial Attached SCSI (SAS) Discover process
 *
 * Copyright (C) 2005 Adaptec, Inc.  All rights reserved.
 * Copyright (C) 2005 Luben Tuikov <luben_tuikov@adaptec.com>
 *
 * This file is licensed under GPLv2.
 *
 * 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., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
 *
 */

#include <linux/scatterlist.h>
#include <linux/slab.h>
#include <scsi/scsi_host.h>
#include <scsi/scsi_eh.h>
#include "sas_internal.h"

#include <scsi/scsi_transport.h>
#include <scsi/scsi_transport_sas.h>
#include "../scsi_sas_internal.h"

/* ---------- Basic task processing for discovery purposes ---------- */

void sas_init_dev(struct domain_device *dev)
{
        INIT_LIST_HEAD(&dev->siblings);
        INIT_LIST_HEAD(&dev->dev_list_node);
        switch (dev->dev_type) {
        case SAS_END_DEV:
                break;
        case EDGE_DEV:
        case FANOUT_DEV:
                INIT_LIST_HEAD(&dev->ex_dev.children);
                break;
        case SATA_DEV:
        case SATA_PM:
        case SATA_PM_PORT:
                INIT_LIST_HEAD(&dev->sata_dev.children);
                break;
        default:
                break;
        }
}

/* ---------- Domain device discovery ---------- */

/**
 * sas_get_port_device -- Discover devices which caused port creation
 * @port: pointer to struct sas_port of interest
 *
 * Devices directly attached to a HA port, have no parent.  This is
 * how we know they are (domain) "root" devices.  All other devices
 * do, and should have their "parent" pointer set appropriately as
 * soon as a child device is discovered.
 */
static int sas_get_port_device(struct asd_sas_port *port)
{
	unsigned long flags;
	struct asd_sas_phy *phy;
	struct sas_rphy *rphy;
	struct domain_device *dev;

	dev = kzalloc(sizeof(*dev), GFP_KERNEL);
	if (!dev)
		return -ENOMEM;

	spin_lock_irqsave(&port->phy_list_lock, flags);
	if (list_empty(&port->phy_list)) {
		spin_unlock_irqrestore(&port->phy_list_lock, flags);
		kfree(dev);
		return -ENODEV;
	}
	phy = container_of(port->phy_list.next, struct asd_sas_phy, port_phy_el);
	spin_lock(&phy->frame_rcvd_lock);
	memcpy(dev->frame_rcvd, phy->frame_rcvd, min(sizeof(dev->frame_rcvd),
					     (size_t)phy->frame_rcvd_size));
	spin_unlock(&phy->frame_rcvd_lock);
	spin_unlock_irqrestore(&port->phy_list_lock, flags);

	if (dev->frame_rcvd[0] == 0x34 && port->oob_mode == SATA_OOB_MODE) {
		struct dev_to_host_fis *fis =
			(struct dev_to_host_fis *) dev->frame_rcvd;
		if (fis->interrupt_reason == 1 && fis->lbal == 1 &&
		    fis->byte_count_low==0x69 && fis->byte_count_high == 0x96
		    && (fis->device & ~0x10) == 0)
			dev->dev_type = SATA_PM;
		else
			dev->dev_type = SATA_DEV;
		dev->tproto = SAS_PROTOCOL_SATA;
	} else {
		struct sas_identify_frame *id =
			(struct sas_identify_frame *) dev->frame_rcvd;
		dev->dev_type = id->dev_type;
		dev->iproto = id->initiator_bits;
		dev->tproto = id->target_bits;
	}

	sas_init_dev(dev);

	switch (dev->dev_type) {
	case SAS_END_DEV:
	case SATA_DEV:
		rphy = sas_end_device_alloc(port->port);
		break;
	case EDGE_DEV:
		rphy = sas_expander_alloc(port->port,
					  SAS_EDGE_EXPANDER_DEVICE);
		break;
	case FANOUT_DEV:
		rphy = sas_expander_alloc(port->port,
					  SAS_FANOUT_EXPANDER_DEVICE);
		break;
	default:
		printk("ERROR: Unidentified device type %d\n", dev->dev_type);
		rphy = NULL;
		break;
	}

	if (!rphy) {
		kfree(dev);
		return -ENODEV;
	}
	rphy->identify.phy_identifier = phy->phy->identify.phy_identifier;
	memcpy(dev->sas_addr, port->attached_sas_addr, SAS_ADDR_SIZE);
	sas_fill_in_rphy(dev, rphy);
	sas_hash_addr(dev->hashed_sas_addr, dev->sas_addr);
	port->port_dev = dev;
	dev->port = port;
	dev->linkrate = port->linkrate;
	dev->min_linkrate = port->linkrate;
	dev->max_linkrate = port->linkrate;
	dev->pathways = port->num_phys;
	memset(port->disc.fanout_sas_addr, 0, SAS_ADDR_SIZE);
	memset(port->disc.eeds_a, 0, SAS_ADDR_SIZE);
	memset(port->disc.eeds_b, 0, SAS_ADDR_SIZE);
	port->disc.max_level = 0;

	dev->rphy = rphy;
	spin_lock_irq(&port->dev_list_lock);
	list_add_tail(&dev->dev_list_node, &port->dev_list);
	spin_unlock_irq(&port->dev_list_lock);

	return 0;
}

/* ---------- Discover and Revalidate ---------- */

int sas_notify_lldd_dev_found(struct domain_device *dev)
{
	int res = 0;
	struct sas_ha_struct *sas_ha = dev->port->ha;
	struct Scsi_Host *shost = sas_ha->core.shost;
	struct sas_internal *i = to_sas_internal(shost->transportt);

	if (i->dft->lldd_dev_found) {
		res = i->dft->lldd_dev_found(dev);
		if (res) {
			printk("sas: driver on pcidev %s cannot handle "
			       "device %llx, error:%d\n",
			       dev_name(sas_ha->dev),
			       SAS_ADDR(dev->sas_addr), res);
		}
	}
	return res;
}


void sas_notify_lldd_dev_gone(struct domain_device *dev)
{
	struct sas_ha_struct *sas_ha = dev->port->ha;
	struct Scsi_Host *shost = sas_ha->core.shost;
	struct sas_internal *i = to_sas_internal(shost->transportt);

	if (i->dft->lldd_dev_gone)
		i->dft->lldd_dev_gone(dev);
}

/* ---------- Common/dispatchers ---------- */


/**
 * sas_discover_end_dev -- discover an end device (SSP, etc)
 * @end: pointer to domain device of interest
 *
 * See comment in sas_discover_sata().
 */
int sas_discover_end_dev(struct domain_device *dev)
{
	int res;

	res = sas_notify_lldd_dev_found(dev);
	if (res)
		goto out_err2;

	res = sas_rphy_add(dev->rphy);
	if (res)
		goto out_err;

	return 0;

out_err:
	sas_notify_lldd_dev_gone(dev);
out_err2:
	return res;
}

/* ---------- Device registration and unregistration ---------- */

static inline void sas_unregister_common_dev(struct domain_device *dev)
{
	sas_notify_lldd_dev_gone(dev);
	if (!dev->parent)
		dev->port->port_dev = NULL;
	else
		list_del_init(&dev->siblings);
	list_del_init(&dev->dev_list_node);
}

void sas_unregister_dev(struct domain_device *dev)
{
	if (dev->rphy) {
		sas_remove_children(&dev->rphy->dev);
		sas_rphy_delete(dev->rphy);
		dev->rphy = NULL;
	}
	if (dev->dev_type == EDGE_DEV || dev->dev_type == FANOUT_DEV) {
		/* remove the phys and ports, everything else should be gone */
		kfree(dev->ex_dev.ex_phy);
		dev->ex_dev.ex_phy = NULL;
	}
	sas_unregister_common_dev(dev);
}

void sas_unregister_domain_devices(struct asd_sas_port *port)
{
	struct domain_device *dev, *n;

	list_for_each_entry_safe_reverse(dev,n,&port->dev_list,dev_list_node)
		sas_unregister_dev(dev);

	port->port->rphy = NULL;

}

/* ---------- Discovery and Revalidation ---------- */

/**
 * sas_discover_domain -- discover the domain
 * @port: port to the domain of interest
 *
 * NOTE: this process _must_ quit (return) as soon as any connection
 * errors are encountered.  Connection recovery is done elsewhere.
 * Discover process only interrogates devices in order to discover the
 * domain.
 */
static void sas_discover_domain(struct work_struct *work)
{
	struct domain_device *dev;
	int error = 0;
	struct sas_discovery_event *ev =
		container_of(work, struct sas_discovery_event, work);
	struct asd_sas_port *port = ev->port;

	sas_begin_event(DISCE_DISCOVER_DOMAIN, &port->disc.disc_event_lock,
			&port->disc.pending);

	if (port->port_dev)
		return;

	error = sas_get_port_device(port);
	if (error)
		return;
	dev = port->port_dev;

	SAS_DPRINTK("DOING DISCOVERY on port %d, pid:%d\n", port->id,
		    task_pid_nr(current));

	switch (dev->dev_type) {
	case SAS_END_DEV:
		error = sas_discover_end_dev(dev);
		break;
	case EDGE_DEV:
	case FANOUT_DEV:
		error = sas_discover_root_expander(dev);
		break;
	case SATA_DEV:
	case SATA_PM:
#ifdef CONFIG_SCSI_SAS_ATA
		error = sas_discover_sata(dev);
		break;
#else
		SAS_DPRINTK("ATA device seen but CONFIG_SCSI_SAS_ATA=N so cannot attach\n");
		/* Fall through */
#endif
	default:
		error = -ENXIO;
		SAS_DPRINTK("unhandled device %d\n", dev->dev_type);
		break;
	}

	if (error) {
		sas_rphy_free(dev->rphy);
		dev->rphy = NULL;

		spin_lock_irq(&port->dev_list_lock);
		list_del_init(&dev->dev_list_node);
		spin_unlock_irq(&port->dev_list_lock);

		kfree(dev); /* not kobject_register-ed yet */
		port->port_dev = NULL;
	}

	SAS_DPRINTK("DONE DISCOVERY on port %d, pid:%d, result:%d\n", port->id,
		    task_pid_nr(current), error);
}

static void sas_revalidate_domain(struct work_struct *work)
{
	int res = 0;
	struct sas_discovery_event *ev =
		container_of(work, struct sas_discovery_event, work);
	struct asd_sas_port *port = ev->port;

	sas_begin_event(DISCE_REVALIDATE_DOMAIN, &port->disc.disc_event_lock,
			&port->disc.pending);

	SAS_DPRINTK("REVALIDATING DOMAIN on port %d, pid:%d\n", port->id,
		    task_pid_nr(current));
	if (port->port_dev)
		res = sas_ex_revalidate_domain(port->port_dev);

	SAS_DPRINTK("done REVALIDATING DOMAIN on port %d, pid:%d, res 0x%x\n",
		    port->id, task_pid_nr(current), res);
}

/* ---------- Events ---------- */

int sas_discover_event(struct asd_sas_port *port, enum discover_event ev)
{
	struct sas_discovery *disc;

	if (!port)
		return 0;
	disc = &port->disc;

	BUG_ON(ev >= DISC_NUM_EVENTS);

	sas_queue_event(ev, &disc->disc_event_lock, &disc->pending,
			&disc->disc_work[ev].work, port->ha);

	return 0;
}

/**
 * sas_init_disc -- initialize the discovery struct in the port
 * @port: pointer to struct port
 *
 * Called when the ports are being initialized.
 */
void sas_init_disc(struct sas_discovery *disc, struct asd_sas_port *port)
{
	int i;

	static const work_func_t sas_event_fns[DISC_NUM_EVENTS] = {
		[DISCE_DISCOVER_DOMAIN] = sas_discover_domain,
		[DISCE_REVALIDATE_DOMAIN] = sas_revalidate_domain,
	};

	spin_lock_init(&disc->disc_event_lock);
	disc->pending = 0;
	for (i = 0; i < DISC_NUM_EVENTS; i++) {
		INIT_WORK(&disc->disc_work[i].work, sas_event_fns[i]);
		disc->disc_work[i].port = port;
	}
}
Commit	Line	Data
2908d778 JB	1	/*
	2	* Serial Attached SCSI (SAS) Discover process
	3	*
	4	* Copyright (C) 2005 Adaptec, Inc. All rights reserved.
	5	* Copyright (C) 2005 Luben Tuikov <luben_tuikov@adaptec.com>
	6	*
	7	* This file is licensed under GPLv2.
	8	*
	9	* This program is free software; you can redistribute it and/or
	10	* modify it under the terms of the GNU General Public License as
	11	* published by the Free Software Foundation; either version 2 of the
	12	* License, or (at your option) any later version.
	13	*
	14	* This program is distributed in the hope that it will be useful, but
	15	* WITHOUT ANY WARRANTY; without even the implied warranty of
	16	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
	17	* General Public License for more details.
	18	*
	19	* You should have received a copy of the GNU General Public License
	20	* along with this program; if not, write to the Free Software
	21	* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
	22	*
	23	*/
	24
2908d778	25	#include <linux/scatterlist.h>
5a0e3ad6	26	#include <linux/slab.h>
2908d778 JB	27	#include <scsi/scsi_host.h>
	28	#include <scsi/scsi_eh.h>
	29	#include "sas_internal.h"
	30
	31	#include <scsi/scsi_transport.h>
	32	#include <scsi/scsi_transport_sas.h>
	33	#include "../scsi_sas_internal.h"
	34
	35	/* ---------- Basic task processing for discovery purposes ---------- */
	36
	37	void sas_init_dev(struct domain_device *dev)
	38	{
	39	INIT_LIST_HEAD(&dev->siblings);
	40	INIT_LIST_HEAD(&dev->dev_list_node);
	41	switch (dev->dev_type) {
	42	case SAS_END_DEV:
	43	break;
	44	case EDGE_DEV:
	45	case FANOUT_DEV:
	46	INIT_LIST_HEAD(&dev->ex_dev.children);
	47	break;
	48	case SATA_DEV:
	49	case SATA_PM:
	50	case SATA_PM_PORT:
	51	INIT_LIST_HEAD(&dev->sata_dev.children);
	52	break;
	53	default:
	54	break;
	55	}
	56	}
	57
2908d778 JB	58	/* ---------- Domain device discovery ---------- */
	59
	60	/**
	61	* sas_get_port_device -- Discover devices which caused port creation
	62	* @port: pointer to struct sas_port of interest
	63	*
	64	* Devices directly attached to a HA port, have no parent. This is
	65	* how we know they are (domain) "root" devices. All other devices
	66	* do, and should have their "parent" pointer set appropriately as
	67	* soon as a child device is discovered.
	68	*/
	69	static int sas_get_port_device(struct asd_sas_port *port)
	70	{
	71	unsigned long flags;
	72	struct asd_sas_phy *phy;
	73	struct sas_rphy *rphy;
	74	struct domain_device *dev;
	75
	76	dev = kzalloc(sizeof(*dev), GFP_KERNEL);
	77	if (!dev)
	78	return -ENOMEM;
	79
	80	spin_lock_irqsave(&port->phy_list_lock, flags);
	81	if (list_empty(&port->phy_list)) {
	82	spin_unlock_irqrestore(&port->phy_list_lock, flags);
	83	kfree(dev);
	84	return -ENODEV;
	85	}
	86	phy = container_of(port->phy_list.next, struct asd_sas_phy, port_phy_el);
	87	spin_lock(&phy->frame_rcvd_lock);
	88	memcpy(dev->frame_rcvd, phy->frame_rcvd, min(sizeof(dev->frame_rcvd),
	89	(size_t)phy->frame_rcvd_size));
	90	spin_unlock(&phy->frame_rcvd_lock);
	91	spin_unlock_irqrestore(&port->phy_list_lock, flags);
	92
	93	if (dev->frame_rcvd[0] == 0x34 && port->oob_mode == SATA_OOB_MODE) {
	94	struct dev_to_host_fis *fis =
	95	(struct dev_to_host_fis *) dev->frame_rcvd;
	96	if (fis->interrupt_reason == 1 && fis->lbal == 1 &&
	97	fis->byte_count_low==0x69 && fis->byte_count_high == 0x96
	98	&& (fis->device & ~0x10) == 0)
	99	dev->dev_type = SATA_PM;
	100	else
	101	dev->dev_type = SATA_DEV;
5929faf3	102	dev->tproto = SAS_PROTOCOL_SATA;
2908d778 JB	103	} else {
	104	struct sas_identify_frame *id =
	105	(struct sas_identify_frame *) dev->frame_rcvd;
	106	dev->dev_type = id->dev_type;
	107	dev->iproto = id->initiator_bits;
	108	dev->tproto = id->target_bits;
	109	}
	110
	111	sas_init_dev(dev);
	112
	113	switch (dev->dev_type) {
	114	case SAS_END_DEV:
fa1c1e8f	115	case SATA_DEV:
2908d778 JB	116	rphy = sas_end_device_alloc(port->port);
	117	break;
	118	case EDGE_DEV:
	119	rphy = sas_expander_alloc(port->port,
	120	SAS_EDGE_EXPANDER_DEVICE);
	121	break;
	122	case FANOUT_DEV:
	123	rphy = sas_expander_alloc(port->port,
	124	SAS_FANOUT_EXPANDER_DEVICE);
	125	break;
2908d778 JB	126	default:
	127	printk("ERROR: Unidentified device type %d\n", dev->dev_type);
	128	rphy = NULL;
	129	break;
	130	}
	131
	132	if (!rphy) {
	133	kfree(dev);
	134	return -ENODEV;
	135	}
	136	rphy->identify.phy_identifier = phy->phy->identify.phy_identifier;
	137	memcpy(dev->sas_addr, port->attached_sas_addr, SAS_ADDR_SIZE);
	138	sas_fill_in_rphy(dev, rphy);
	139	sas_hash_addr(dev->hashed_sas_addr, dev->sas_addr);
	140	port->port_dev = dev;
	141	dev->port = port;
	142	dev->linkrate = port->linkrate;
	143	dev->min_linkrate = port->linkrate;
	144	dev->max_linkrate = port->linkrate;
	145	dev->pathways = port->num_phys;
	146	memset(port->disc.fanout_sas_addr, 0, SAS_ADDR_SIZE);
	147	memset(port->disc.eeds_a, 0, SAS_ADDR_SIZE);
	148	memset(port->disc.eeds_b, 0, SAS_ADDR_SIZE);
	149	port->disc.max_level = 0;
	150
	151	dev->rphy = rphy;
9d720d82	152	spin_lock_irq(&port->dev_list_lock);
2908d778	153	list_add_tail(&dev->dev_list_node, &port->dev_list);
9d720d82	154	spin_unlock_irq(&port->dev_list_lock);
2908d778 JB	155
	156	return 0;
	157	}
	158
	159	/* ---------- Discover and Revalidate ---------- */
	160
2908d778 JB	161	int sas_notify_lldd_dev_found(struct domain_device *dev)
	162	{
	163	int res = 0;
	164	struct sas_ha_struct *sas_ha = dev->port->ha;
	165	struct Scsi_Host *shost = sas_ha->core.shost;
	166	struct sas_internal *i = to_sas_internal(shost->transportt);
	167
	168	if (i->dft->lldd_dev_found) {
	169	res = i->dft->lldd_dev_found(dev);
	170	if (res) {
	171	printk("sas: driver on pcidev %s cannot handle "
	172	"device %llx, error:%d\n",
71610f55	173	dev_name(sas_ha->dev),
2908d778 JB	174	SAS_ADDR(dev->sas_addr), res);
	175	}
	176	}
	177	return res;
	178	}
	179
	180
	181	void sas_notify_lldd_dev_gone(struct domain_device *dev)
	182	{
	183	struct sas_ha_struct *sas_ha = dev->port->ha;
	184	struct Scsi_Host *shost = sas_ha->core.shost;
	185	struct sas_internal *i = to_sas_internal(shost->transportt);
	186
	187	if (i->dft->lldd_dev_gone)
	188	i->dft->lldd_dev_gone(dev);
	189	}
	190
	191	/* ---------- Common/dispatchers ---------- */
	192
2908d778 JB	193
	194	/**
	195	* sas_discover_end_dev -- discover an end device (SSP, etc)
	196	* @end: pointer to domain device of interest
	197	*
	198	* See comment in sas_discover_sata().
	199	*/
	200	int sas_discover_end_dev(struct domain_device *dev)
	201	{
	202	int res;
	203
	204	res = sas_notify_lldd_dev_found(dev);
	205	if (res)
88808398	206	goto out_err2;
2908d778 JB	207
	208	res = sas_rphy_add(dev->rphy);
	209	if (res)
	210	goto out_err;
	211
2908d778 JB	212	return 0;
	213
	214	out_err:
	215	sas_notify_lldd_dev_gone(dev);
88808398	216	out_err2:
2908d778 JB	217	return res;
	218	}
	219
	220	/* ---------- Device registration and unregistration ---------- */
	221
	222	static inline void sas_unregister_common_dev(struct domain_device *dev)
	223	{
	224	sas_notify_lldd_dev_gone(dev);
	225	if (!dev->parent)
	226	dev->port->port_dev = NULL;
	227	else
	228	list_del_init(&dev->siblings);
	229	list_del_init(&dev->dev_list_node);
	230	}
	231
	232	void sas_unregister_dev(struct domain_device *dev)
	233	{
	234	if (dev->rphy) {
	235	sas_remove_children(&dev->rphy->dev);
	236	sas_rphy_delete(dev->rphy);
	237	dev->rphy = NULL;
	238	}
	239	if (dev->dev_type == EDGE_DEV \|\| dev->dev_type == FANOUT_DEV) {
	240	/* remove the phys and ports, everything else should be gone */
	241	kfree(dev->ex_dev.ex_phy);
	242	dev->ex_dev.ex_phy = NULL;
	243	}
	244	sas_unregister_common_dev(dev);
	245	}
	246
	247	void sas_unregister_domain_devices(struct asd_sas_port *port)
	248	{
	249	struct domain_device dev, n;
	250
	251	list_for_each_entry_safe_reverse(dev,n,&port->dev_list,dev_list_node)
	252	sas_unregister_dev(dev);
	253
	254	port->port->rphy = NULL;
	255
	256	}
	257
	258	/* ---------- Discovery and Revalidation ---------- */
	259
	260	/**
	261	* sas_discover_domain -- discover the domain
	262	* @port: port to the domain of interest
	263	*
	264	* NOTE: this process _must_ quit (return) as soon as any connection
	265	* errors are encountered. Connection recovery is done elsewhere.
	266	* Discover process only interrogates devices in order to discover the
	267	* domain.
	268	*/
c4028958	269	static void sas_discover_domain(struct work_struct *work)
2908d778	270	{
6f63caae	271	struct domain_device *dev;
2908d778	272	int error = 0;
c4028958 DH	273	struct sas_discovery_event *ev =
	274	container_of(work, struct sas_discovery_event, work);
	275	struct asd_sas_port *port = ev->port;
2908d778 JB	276
	277	sas_begin_event(DISCE_DISCOVER_DOMAIN, &port->disc.disc_event_lock,
	278	&port->disc.pending);
	279
	280	if (port->port_dev)
6f63caae DW	281	return;
	282
	283	error = sas_get_port_device(port);
	284	if (error)
	285	return;
	286	dev = port->port_dev;
2908d778 JB	287
2908d778 JB	288	SAS_DPRINTK("DOING DISCOVERY on port %d, pid:%d\n", port->id,
ba25f9dc	289	task_pid_nr(current));
2908d778	290
6f63caae	291	switch (dev->dev_type) {
2908d778	292	case SAS_END_DEV:
6f63caae	293	error = sas_discover_end_dev(dev);
2908d778 JB	294	break;
	295	case EDGE_DEV:
	296	case FANOUT_DEV:
6f63caae	297	error = sas_discover_root_expander(dev);
2908d778 JB	298	break;
	299	case SATA_DEV:
	300	case SATA_PM:
15c73d5a	301	#ifdef CONFIG_SCSI_SAS_ATA
6f63caae	302	error = sas_discover_sata(dev);
2908d778	303	break;
15c73d5a JB	304	#else
	305	SAS_DPRINTK("ATA device seen but CONFIG_SCSI_SAS_ATA=N so cannot attach\n");
	306	/* Fall through */
b9142174	307	#endif
2908d778	308	default:
b9142174	309	error = -ENXIO;
6f63caae	310	SAS_DPRINTK("unhandled device %d\n", dev->dev_type);
2908d778 JB	311	break;
	312	}
	313
	314	if (error) {
6f63caae DW	315	sas_rphy_free(dev->rphy);
	316	dev->rphy = NULL;
	317
9d720d82	318	spin_lock_irq(&port->dev_list_lock);
6f63caae	319	list_del_init(&dev->dev_list_node);
9d720d82	320	spin_unlock_irq(&port->dev_list_lock);
88808398	321
6f63caae	322	kfree(dev); /* not kobject_register-ed yet */
2908d778 JB	323	port->port_dev = NULL;
	324	}
	325
	326	SAS_DPRINTK("DONE DISCOVERY on port %d, pid:%d, result:%d\n", port->id,
ba25f9dc	327	task_pid_nr(current), error);
2908d778 JB	328	}
2908d778 JB	329
c4028958	330	static void sas_revalidate_domain(struct work_struct *work)
2908d778 JB	331	{
2908d778 JB	332	int res = 0;
c4028958 DH	333	struct sas_discovery_event *ev =
	334	container_of(work, struct sas_discovery_event, work);
	335	struct asd_sas_port *port = ev->port;
2908d778 JB	336
	337	sas_begin_event(DISCE_REVALIDATE_DOMAIN, &port->disc.disc_event_lock,
	338	&port->disc.pending);
	339
	340	SAS_DPRINTK("REVALIDATING DOMAIN on port %d, pid:%d\n", port->id,
ba25f9dc	341	task_pid_nr(current));
2908d778 JB	342	if (port->port_dev)
	343	res = sas_ex_revalidate_domain(port->port_dev);
	344
	345	SAS_DPRINTK("done REVALIDATING DOMAIN on port %d, pid:%d, res 0x%x\n",
ba25f9dc	346	port->id, task_pid_nr(current), res);
2908d778 JB	347	}
	348
	349	/* ---------- Events ---------- */
	350
	351	int sas_discover_event(struct asd_sas_port *port, enum discover_event ev)
	352	{
	353	struct sas_discovery *disc;
	354
	355	if (!port)
	356	return 0;
	357	disc = &port->disc;
	358
	359	BUG_ON(ev >= DISC_NUM_EVENTS);
	360
	361	sas_queue_event(ev, &disc->disc_event_lock, &disc->pending,
6b0efb85	362	&disc->disc_work[ev].work, port->ha);
2908d778 JB	363
	364	return 0;
	365	}
	366
	367	/**
	368	* sas_init_disc -- initialize the discovery struct in the port
	369	* @port: pointer to struct port
	370	*
	371	* Called when the ports are being initialized.
	372	*/
	373	void sas_init_disc(struct sas_discovery disc, struct asd_sas_port port)
	374	{
	375	int i;
	376
c4028958	377	static const work_func_t sas_event_fns[DISC_NUM_EVENTS] = {
2908d778 JB	378	[DISCE_DISCOVER_DOMAIN] = sas_discover_domain,
	379	[DISCE_REVALIDATE_DOMAIN] = sas_revalidate_domain,
	380	};
	381
	382	spin_lock_init(&disc->disc_event_lock);
	383	disc->pending = 0;
c4028958 DH	384	for (i = 0; i < DISC_NUM_EVENTS; i++) {
	385	INIT_WORK(&disc->disc_work[i].work, sas_event_fns[i]);
	386	disc->disc_work[i].port = port;
	387	}
2908d778	388	}