[linux-2.6-block.git] / drivers / scsi / libsas / sas_port.c

/*
 * Serial Attached SCSI (SAS) Port class
 *
 * 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 "sas_internal.h"

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

static bool phy_is_wideport_member(struct asd_sas_port *port, struct asd_sas_phy *phy)
{
	struct sas_ha_struct *sas_ha = phy->ha;

	if (memcmp(port->attached_sas_addr, phy->attached_sas_addr,
		   SAS_ADDR_SIZE) != 0 || (sas_ha->strict_wide_ports &&
	     memcmp(port->sas_addr, phy->sas_addr, SAS_ADDR_SIZE) != 0))
		return false;
	return true;
}

static void sas_resume_port(struct asd_sas_phy *phy)
{
	struct domain_device *dev;
	struct asd_sas_port *port = phy->port;
	struct sas_ha_struct *sas_ha = phy->ha;
	struct sas_internal *si = to_sas_internal(sas_ha->core.shost->transportt);

	if (si->dft->lldd_port_formed)
		si->dft->lldd_port_formed(phy);

	if (port->suspended)
		port->suspended = 0;
	else {
		/* we only need to handle "link returned" actions once */
		return;
	}

	/* if the port came back:
	 * 1/ presume every device came back
	 * 2/ force the next revalidation to check all expander phys
	 */
	list_for_each_entry(dev, &port->dev_list, dev_list_node) {
		int i, rc;

		rc = sas_notify_lldd_dev_found(dev);
		if (rc) {
			sas_unregister_dev(port, dev);
			sas_destruct_devices(port);
			continue;
		}

		if (dev->dev_type == SAS_EDGE_EXPANDER_DEVICE || dev->dev_type == SAS_FANOUT_EXPANDER_DEVICE) {
			dev->ex_dev.ex_change_count = -1;
			for (i = 0; i < dev->ex_dev.num_phys; i++) {
				struct ex_phy *phy = &dev->ex_dev.ex_phy[i];

				phy->phy_change_count = -1;
			}
		}
	}

	sas_discover_event(port, DISCE_RESUME);
}

/**
 * sas_form_port - add this phy to a port
 * @phy: the phy of interest
 *
 * This function adds this phy to an existing port, thus creating a wide
 * port, or it creates a port and adds the phy to the port.
 */
static void sas_form_port(struct asd_sas_phy *phy)
{
	int i;
	struct sas_ha_struct *sas_ha = phy->ha;
	struct asd_sas_port *port = phy->port;
	struct domain_device *port_dev;
	struct sas_internal *si =
		to_sas_internal(sas_ha->core.shost->transportt);
	unsigned long flags;

	if (port) {
		if (!phy_is_wideport_member(port, phy))
			sas_deform_port(phy, 0);
		else if (phy->suspended) {
			phy->suspended = 0;
			sas_resume_port(phy);

			/* phy came back, try to cancel the timeout */
			wake_up(&sas_ha->eh_wait_q);
			return;
		} else {
			pr_info("%s: phy%d belongs to port%d already(%d)!\n",
				__func__, phy->id, phy->port->id,
				phy->port->num_phys);
			return;
		}
	}

	/* see if the phy should be part of a wide port */
	spin_lock_irqsave(&sas_ha->phy_port_lock, flags);
	for (i = 0; i < sas_ha->num_phys; i++) {
		port = sas_ha->sas_port[i];
		spin_lock(&port->phy_list_lock);
		if (*(u64 *) port->sas_addr &&
		    phy_is_wideport_member(port, phy) && port->num_phys > 0) {
			/* wide port */
			pr_debug("phy%d matched wide port%d\n", phy->id,
				 port->id);
			break;
		}
		spin_unlock(&port->phy_list_lock);
	}
	/* The phy does not match any existing port, create a new one */
	if (i == sas_ha->num_phys) {
		for (i = 0; i < sas_ha->num_phys; i++) {
			port = sas_ha->sas_port[i];
			spin_lock(&port->phy_list_lock);
			if (*(u64 *)port->sas_addr == 0
				&& port->num_phys == 0) {
				memcpy(port->sas_addr, phy->sas_addr,
					SAS_ADDR_SIZE);
				break;
			}
			spin_unlock(&port->phy_list_lock);
		}
	}

	if (i >= sas_ha->num_phys) {
		pr_err("%s: couldn't find a free port, bug?\n", __func__);
		spin_unlock_irqrestore(&sas_ha->phy_port_lock, flags);
		return;
	}

	/* add the phy to the port */
	port_dev = port->port_dev;
	list_add_tail(&phy->port_phy_el, &port->phy_list);
	sas_phy_set_target(phy, port_dev);
	phy->port = port;
	port->num_phys++;
	port->phy_mask |= (1U << phy->id);

	if (*(u64 *)port->attached_sas_addr == 0) {
		port->class = phy->class;
		memcpy(port->attached_sas_addr, phy->attached_sas_addr,
		       SAS_ADDR_SIZE);
		port->iproto = phy->iproto;
		port->tproto = phy->tproto;
		port->oob_mode = phy->oob_mode;
		port->linkrate = phy->linkrate;
	} else
		port->linkrate = max(port->linkrate, phy->linkrate);
	spin_unlock(&port->phy_list_lock);
	spin_unlock_irqrestore(&sas_ha->phy_port_lock, flags);

	if (!port->port) {
		port->port = sas_port_alloc(phy->phy->dev.parent, port->id);
		BUG_ON(!port->port);
		sas_port_add(port->port);
	}
	sas_port_add_phy(port->port, phy->phy);

	pr_debug("%s added to %s, phy_mask:0x%x (%16llx)\n",
		 dev_name(&phy->phy->dev), dev_name(&port->port->dev),
		 port->phy_mask,
		 SAS_ADDR(port->attached_sas_addr));

	if (port_dev)
		port_dev->pathways = port->num_phys;

	/* Tell the LLDD about this port formation. */
	if (si->dft->lldd_port_formed)
		si->dft->lldd_port_formed(phy);

	sas_discover_event(phy->port, DISCE_DISCOVER_DOMAIN);
	/* Only insert a revalidate event after initial discovery */
	if (port_dev && sas_dev_type_is_expander(port_dev->dev_type)) {
		struct expander_device *ex_dev = &port_dev->ex_dev;

		ex_dev->ex_change_count = -1;
		sas_discover_event(port, DISCE_REVALIDATE_DOMAIN);
	}
	flush_workqueue(sas_ha->disco_q);
}

/**
 * sas_deform_port - remove this phy from the port it belongs to
 * @phy: the phy of interest
 * @gone: whether or not the PHY is gone
 *
 * This is called when the physical link to the other phy has been
 * lost (on this phy), in Event thread context. We cannot delay here.
 */
void sas_deform_port(struct asd_sas_phy *phy, int gone)
{
	struct sas_ha_struct *sas_ha = phy->ha;
	struct asd_sas_port *port = phy->port;
	struct sas_internal *si =
		to_sas_internal(sas_ha->core.shost->transportt);
	struct domain_device *dev;
	unsigned long flags;

	if (!port)
		return;		  /* done by a phy event */

	dev = port->port_dev;
	if (dev)
		dev->pathways--;

	if (port->num_phys == 1) {
		sas_unregister_domain_devices(port, gone);
		sas_destruct_devices(port);
		sas_port_delete(port->port);
		port->port = NULL;
	} else {
		sas_port_delete_phy(port->port, phy->phy);
		sas_device_set_phy(dev, port->port);
	}

	if (si->dft->lldd_port_deformed)
		si->dft->lldd_port_deformed(phy);

	spin_lock_irqsave(&sas_ha->phy_port_lock, flags);
	spin_lock(&port->phy_list_lock);

	list_del_init(&phy->port_phy_el);
	sas_phy_set_target(phy, NULL);
	phy->port = NULL;
	port->num_phys--;
	port->phy_mask &= ~(1U << phy->id);

	if (port->num_phys == 0) {
		INIT_LIST_HEAD(&port->phy_list);
		memset(port->sas_addr, 0, SAS_ADDR_SIZE);
		memset(port->attached_sas_addr, 0, SAS_ADDR_SIZE);
		port->class = 0;
		port->iproto = 0;
		port->tproto = 0;
		port->oob_mode = 0;
		port->phy_mask = 0;
	}
	spin_unlock(&port->phy_list_lock);
	spin_unlock_irqrestore(&sas_ha->phy_port_lock, flags);

	/* Only insert revalidate event if the port still has members */
	if (port->port && dev && sas_dev_type_is_expander(dev->dev_type)) {
		struct expander_device *ex_dev = &dev->ex_dev;

		ex_dev->ex_change_count = -1;
		sas_discover_event(port, DISCE_REVALIDATE_DOMAIN);
	}
	flush_workqueue(sas_ha->disco_q);

	return;
}

/* ---------- SAS port events ---------- */

void sas_porte_bytes_dmaed(struct work_struct *work)
{
	struct asd_sas_event *ev = to_asd_sas_event(work);
	struct asd_sas_phy *phy = ev->phy;

	sas_form_port(phy);
}

void sas_porte_broadcast_rcvd(struct work_struct *work)
{
	struct asd_sas_event *ev = to_asd_sas_event(work);
	struct asd_sas_phy *phy = ev->phy;
	unsigned long flags;
	u32 prim;

	spin_lock_irqsave(&phy->sas_prim_lock, flags);
	prim = phy->sas_prim;
	spin_unlock_irqrestore(&phy->sas_prim_lock, flags);

	pr_debug("broadcast received: %d\n", prim);
	sas_discover_event(phy->port, DISCE_REVALIDATE_DOMAIN);

	if (phy->port)
		flush_workqueue(phy->port->ha->disco_q);
}

void sas_porte_link_reset_err(struct work_struct *work)
{
	struct asd_sas_event *ev = to_asd_sas_event(work);
	struct asd_sas_phy *phy = ev->phy;

	sas_deform_port(phy, 1);
}

void sas_porte_timer_event(struct work_struct *work)
{
	struct asd_sas_event *ev = to_asd_sas_event(work);
	struct asd_sas_phy *phy = ev->phy;

	sas_deform_port(phy, 1);
}

void sas_porte_hard_reset(struct work_struct *work)
{
	struct asd_sas_event *ev = to_asd_sas_event(work);
	struct asd_sas_phy *phy = ev->phy;

	sas_deform_port(phy, 1);
}

/* ---------- SAS port registration ---------- */

static void sas_init_port(struct asd_sas_port *port,
			  struct sas_ha_struct *sas_ha, int i)
{
	memset(port, 0, sizeof(*port));
	port->id = i;
	INIT_LIST_HEAD(&port->dev_list);
	INIT_LIST_HEAD(&port->disco_list);
	INIT_LIST_HEAD(&port->destroy_list);
	INIT_LIST_HEAD(&port->sas_port_del_list);
	spin_lock_init(&port->phy_list_lock);
	INIT_LIST_HEAD(&port->phy_list);
	port->ha = sas_ha;

	spin_lock_init(&port->dev_list_lock);
}

int sas_register_ports(struct sas_ha_struct *sas_ha)
{
	int i;

	/* initialize the ports and discovery */
	for (i = 0; i < sas_ha->num_phys; i++) {
		struct asd_sas_port *port = sas_ha->sas_port[i];

		sas_init_port(port, sas_ha, i);
		sas_init_disc(&port->disc, port);
	}
	return 0;
}

void sas_unregister_ports(struct sas_ha_struct *sas_ha)
{
	int i;

	for (i = 0; i < sas_ha->num_phys; i++)
		if (sas_ha->sas_phy[i]->port)
			sas_deform_port(sas_ha->sas_phy[i], 0);

}

const work_func_t sas_port_event_fns[PORT_NUM_EVENTS] = {
	[PORTE_BYTES_DMAED] = sas_porte_bytes_dmaed,
	[PORTE_BROADCAST_RCVD] = sas_porte_broadcast_rcvd,
	[PORTE_LINK_RESET_ERR] = sas_porte_link_reset_err,
	[PORTE_TIMER_EVENT] = sas_porte_timer_event,
	[PORTE_HARD_RESET] = sas_porte_hard_reset,
};
Commit	Line	Data
2908d778 JB	1	/*
	2	* Serial Attached SCSI (SAS) Port class
	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
	25	#include "sas_internal.h"
	26
	27	#include <scsi/scsi_transport.h>
	28	#include <scsi/scsi_transport_sas.h>
	29	#include "../scsi_sas_internal.h"
	30
00f0254e DW	31	static bool phy_is_wideport_member(struct asd_sas_port port, struct asd_sas_phy phy)
	32	{
	33	struct sas_ha_struct *sas_ha = phy->ha;
	34
	35	if (memcmp(port->attached_sas_addr, phy->attached_sas_addr,
	36	SAS_ADDR_SIZE) != 0 \|\| (sas_ha->strict_wide_ports &&
	37	memcmp(port->sas_addr, phy->sas_addr, SAS_ADDR_SIZE) != 0))
	38	return false;
	39	return true;
	40	}
	41
303694ee DW	42	static void sas_resume_port(struct asd_sas_phy *phy)
	43	{
	44	struct domain_device *dev;
	45	struct asd_sas_port *port = phy->port;
	46	struct sas_ha_struct *sas_ha = phy->ha;
	47	struct sas_internal *si = to_sas_internal(sas_ha->core.shost->transportt);
	48
	49	if (si->dft->lldd_port_formed)
	50	si->dft->lldd_port_formed(phy);
	51
	52	if (port->suspended)
	53	port->suspended = 0;
	54	else {
	55	/* we only need to handle "link returned" actions once */
	56	return;
	57	}
	58
	59	/* if the port came back:
	60	* 1/ presume every device came back
	61	* 2/ force the next revalidation to check all expander phys
	62	*/
	63	list_for_each_entry(dev, &port->dev_list, dev_list_node) {
	64	int i, rc;
	65
	66	rc = sas_notify_lldd_dev_found(dev);
	67	if (rc) {
	68	sas_unregister_dev(port, dev);
0558f33c	69	sas_destruct_devices(port);
303694ee DW	70	continue;
	71	}
	72
aa9f8328	73	if (dev->dev_type == SAS_EDGE_EXPANDER_DEVICE \|\| dev->dev_type == SAS_FANOUT_EXPANDER_DEVICE) {
303694ee DW	74	dev->ex_dev.ex_change_count = -1;
	75	for (i = 0; i < dev->ex_dev.num_phys; i++) {
	76	struct ex_phy *phy = &dev->ex_dev.ex_phy[i];
	77
	78	phy->phy_change_count = -1;
	79	}
	80	}
	81	}
	82
	83	sas_discover_event(port, DISCE_RESUME);
	84	}
	85
2908d778	86	/**
121246ae	87	* sas_form_port - add this phy to a port
2908d778 JB	88	* @phy: the phy of interest
	89	*
	90	* This function adds this phy to an existing port, thus creating a wide
	91	* port, or it creates a port and adds the phy to the port.
	92	*/
	93	static void sas_form_port(struct asd_sas_phy *phy)
	94	{
	95	int i;
	96	struct sas_ha_struct *sas_ha = phy->ha;
	97	struct asd_sas_port *port = phy->port;
085f104a	98	struct domain_device *port_dev;
2908d778 JB	99	struct sas_internal *si =
2908d778 JB	100	to_sas_internal(sas_ha->core.shost->transportt);
980fa2f9	101	unsigned long flags;
2908d778 JB	102
2908d778 JB	103	if (port) {
00f0254e	104	if (!phy_is_wideport_member(port, phy))
90f1e10d	105	sas_deform_port(phy, 0);
303694ee DW	106	else if (phy->suspended) {
	107	phy->suspended = 0;
	108	sas_resume_port(phy);
	109
	110	/* phy came back, try to cancel the timeout */
	111	wake_up(&sas_ha->eh_wait_q);
	112	return;
	113	} else {
15ba7806 JG	114	pr_info("%s: phy%d belongs to port%d already(%d)!\n",
	115	__func__, phy->id, phy->port->id,
	116	phy->port->num_phys);
2908d778 JB	117	return;
	118	}
	119	}
	120
5381837f	121	/* see if the phy should be part of a wide port */
980fa2f9	122	spin_lock_irqsave(&sas_ha->phy_port_lock, flags);
2908d778 JB	123	for (i = 0; i < sas_ha->num_phys; i++) {
	124	port = sas_ha->sas_port[i];
	125	spin_lock(&port->phy_list_lock);
	126	if ((u64 ) port->sas_addr &&
00f0254e	127	phy_is_wideport_member(port, phy) && port->num_phys > 0) {
2908d778	128	/* wide port */
15ba7806 JG	129	pr_debug("phy%d matched wide port%d\n", phy->id,
15ba7806 JG	130	port->id);
2908d778	131	break;
2908d778 JB	132	}
	133	spin_unlock(&port->phy_list_lock);
	134	}
5381837f TP	135	/* The phy does not match any existing port, create a new one */
	136	if (i == sas_ha->num_phys) {
	137	for (i = 0; i < sas_ha->num_phys; i++) {
	138	port = sas_ha->sas_port[i];
	139	spin_lock(&port->phy_list_lock);
	140	if ((u64 )port->sas_addr == 0
	141	&& port->num_phys == 0) {
	142	memcpy(port->sas_addr, phy->sas_addr,
	143	SAS_ADDR_SIZE);
	144	break;
	145	}
	146	spin_unlock(&port->phy_list_lock);
	147	}
	148	}
2908d778 JB	149
2908d778 JB	150	if (i >= sas_ha->num_phys) {
15ba7806	151	pr_err("%s: couldn't find a free port, bug?\n", __func__);
980fa2f9	152	spin_unlock_irqrestore(&sas_ha->phy_port_lock, flags);
2908d778 JB	153	return;
	154	}
	155
	156	/* add the phy to the port */
085f104a	157	port_dev = port->port_dev;
2908d778	158	list_add_tail(&phy->port_phy_el, &port->phy_list);
085f104a	159	sas_phy_set_target(phy, port_dev);
2908d778 JB	160	phy->port = port;
	161	port->num_phys++;
	162	port->phy_mask \|= (1U << phy->id);
	163
2908d778 JB	164	if ((u64 )port->attached_sas_addr == 0) {
	165	port->class = phy->class;
	166	memcpy(port->attached_sas_addr, phy->attached_sas_addr,
	167	SAS_ADDR_SIZE);
	168	port->iproto = phy->iproto;
	169	port->tproto = phy->tproto;
	170	port->oob_mode = phy->oob_mode;
	171	port->linkrate = phy->linkrate;
	172	} else
	173	port->linkrate = max(port->linkrate, phy->linkrate);
	174	spin_unlock(&port->phy_list_lock);
980fa2f9	175	spin_unlock_irqrestore(&sas_ha->phy_port_lock, flags);
2908d778 JB	176
2908d778 JB	177	if (!port->port) {
b4698d88	178	port->port = sas_port_alloc(phy->phy->dev.parent, port->id);
2908d778 JB	179	BUG_ON(!port->port);
	180	sas_port_add(port->port);
	181	}
	182	sas_port_add_phy(port->port, phy->phy);
	183
15ba7806 JG	184	pr_debug("%s added to %s, phy_mask:0x%x (%16llx)\n",
	185	dev_name(&phy->phy->dev), dev_name(&port->port->dev),
	186	port->phy_mask,
	187	SAS_ADDR(port->attached_sas_addr));
a29c0515	188
085f104a JG	189	if (port_dev)
085f104a JG	190	port_dev->pathways = port->num_phys;
2908d778 JB	191
	192	/* Tell the LLDD about this port formation. */
	193	if (si->dft->lldd_port_formed)
	194	si->dft->lldd_port_formed(phy);
	195
	196	sas_discover_event(phy->port, DISCE_DISCOVER_DOMAIN);
085f104a JG	197	/* Only insert a revalidate event after initial discovery */
	198	if (port_dev && sas_dev_type_is_expander(port_dev->dev_type)) {
	199	struct expander_device *ex_dev = &port_dev->ex_dev;
	200
	201	ex_dev->ex_change_count = -1;
	202	sas_discover_event(port, DISCE_REVALIDATE_DOMAIN);
	203	}
517e5153	204	flush_workqueue(sas_ha->disco_q);
2908d778 JB	205	}
	206
	207	/**
121246ae	208	* sas_deform_port - remove this phy from the port it belongs to
2908d778	209	* @phy: the phy of interest
121246ae	210	* @gone: whether or not the PHY is gone
2908d778 JB	211	*
	212	* This is called when the physical link to the other phy has been
	213	* lost (on this phy), in Event thread context. We cannot delay here.
	214	*/
90f1e10d	215	void sas_deform_port(struct asd_sas_phy *phy, int gone)
2908d778 JB	216	{
	217	struct sas_ha_struct *sas_ha = phy->ha;
	218	struct asd_sas_port *port = phy->port;
	219	struct sas_internal *si =
	220	to_sas_internal(sas_ha->core.shost->transportt);
90f1e10d	221	struct domain_device *dev;
980fa2f9	222	unsigned long flags;
2908d778 JB	223
	224	if (!port)
	225	return; /* done by a phy event */
	226
90f1e10d DW	227	dev = port->port_dev;
	228	if (dev)
	229	dev->pathways--;
2908d778 JB	230
2908d778 JB	231	if (port->num_phys == 1) {
7d05919a	232	sas_unregister_domain_devices(port, gone);
0558f33c	233	sas_destruct_devices(port);
2908d778 JB	234	sas_port_delete(port->port);
2908d778 JB	235	port->port = NULL;
f41a0c44	236	} else {
2908d778	237	sas_port_delete_phy(port->port, phy->phy);
f41a0c44 DW	238	sas_device_set_phy(dev, port->port);
f41a0c44 DW	239	}
2908d778	240
2908d778 JB	241	if (si->dft->lldd_port_deformed)
	242	si->dft->lldd_port_deformed(phy);
	243
980fa2f9	244	spin_lock_irqsave(&sas_ha->phy_port_lock, flags);
2908d778 JB	245	spin_lock(&port->phy_list_lock);
	246
	247	list_del_init(&phy->port_phy_el);
899fcf40	248	sas_phy_set_target(phy, NULL);
2908d778 JB	249	phy->port = NULL;
	250	port->num_phys--;
	251	port->phy_mask &= ~(1U << phy->id);
	252
	253	if (port->num_phys == 0) {
	254	INIT_LIST_HEAD(&port->phy_list);
	255	memset(port->sas_addr, 0, SAS_ADDR_SIZE);
	256	memset(port->attached_sas_addr, 0, SAS_ADDR_SIZE);
	257	port->class = 0;
	258	port->iproto = 0;
	259	port->tproto = 0;
	260	port->oob_mode = 0;
	261	port->phy_mask = 0;
	262	}
	263	spin_unlock(&port->phy_list_lock);
980fa2f9	264	spin_unlock_irqrestore(&sas_ha->phy_port_lock, flags);
2908d778	265
085f104a JG	266	/* Only insert revalidate event if the port still has members */
	267	if (port->port && dev && sas_dev_type_is_expander(dev->dev_type)) {
	268	struct expander_device *ex_dev = &dev->ex_dev;
	269
	270	ex_dev->ex_change_count = -1;
	271	sas_discover_event(port, DISCE_REVALIDATE_DOMAIN);
	272	}
	273	flush_workqueue(sas_ha->disco_q);
	274
2908d778 JB	275	return;
	276	}
	277
	278	/* ---------- SAS port events ---------- */
	279
c4028958	280	void sas_porte_bytes_dmaed(struct work_struct *work)
2908d778	281	{
22b9153f	282	struct asd_sas_event *ev = to_asd_sas_event(work);
c4028958	283	struct asd_sas_phy *phy = ev->phy;
2908d778	284
2908d778 JB	285	sas_form_port(phy);
	286	}
	287
c4028958	288	void sas_porte_broadcast_rcvd(struct work_struct *work)
2908d778	289	{
22b9153f	290	struct asd_sas_event *ev = to_asd_sas_event(work);
c4028958	291	struct asd_sas_phy *phy = ev->phy;
2908d778 JB	292	unsigned long flags;
2908d778 JB	293	u32 prim;
2908d778	294
2908d778 JB	295	spin_lock_irqsave(&phy->sas_prim_lock, flags);
	296	prim = phy->sas_prim;
	297	spin_unlock_irqrestore(&phy->sas_prim_lock, flags);
	298
15ba7806	299	pr_debug("broadcast received: %d\n", prim);
2908d778	300	sas_discover_event(phy->port, DISCE_REVALIDATE_DOMAIN);
517e5153 JY	301
	302	if (phy->port)
	303	flush_workqueue(phy->port->ha->disco_q);
2908d778 JB	304	}
2908d778 JB	305
c4028958	306	void sas_porte_link_reset_err(struct work_struct *work)
2908d778	307	{
22b9153f	308	struct asd_sas_event *ev = to_asd_sas_event(work);
c4028958	309	struct asd_sas_phy *phy = ev->phy;
2908d778	310
90f1e10d	311	sas_deform_port(phy, 1);
2908d778 JB	312	}
2908d778 JB	313
c4028958	314	void sas_porte_timer_event(struct work_struct *work)
2908d778	315	{
22b9153f	316	struct asd_sas_event *ev = to_asd_sas_event(work);
c4028958	317	struct asd_sas_phy *phy = ev->phy;
2908d778	318
90f1e10d	319	sas_deform_port(phy, 1);
2908d778 JB	320	}
2908d778 JB	321
c4028958	322	void sas_porte_hard_reset(struct work_struct *work)
2908d778	323	{
22b9153f	324	struct asd_sas_event *ev = to_asd_sas_event(work);
c4028958	325	struct asd_sas_phy *phy = ev->phy;
2908d778	326
90f1e10d	327	sas_deform_port(phy, 1);
2908d778 JB	328	}
	329
	330	/* ---------- SAS port registration ---------- */
	331
	332	static void sas_init_port(struct asd_sas_port *port,
	333	struct sas_ha_struct *sas_ha, int i)
	334	{
a29c0515	335	memset(port, 0, sizeof(*port));
2908d778 JB	336	port->id = i;
2908d778 JB	337	INIT_LIST_HEAD(&port->dev_list);
87c8331f DW	338	INIT_LIST_HEAD(&port->disco_list);
87c8331f DW	339	INIT_LIST_HEAD(&port->destroy_list);
0558f33c	340	INIT_LIST_HEAD(&port->sas_port_del_list);
2908d778 JB	341	spin_lock_init(&port->phy_list_lock);
2908d778 JB	342	INIT_LIST_HEAD(&port->phy_list);
2908d778 JB	343	port->ha = sas_ha;
	344
	345	spin_lock_init(&port->dev_list_lock);
	346	}
	347
	348	int sas_register_ports(struct sas_ha_struct *sas_ha)
	349	{
	350	int i;
	351
	352	/* initialize the ports and discovery */
	353	for (i = 0; i < sas_ha->num_phys; i++) {
	354	struct asd_sas_port *port = sas_ha->sas_port[i];
	355
	356	sas_init_port(port, sas_ha, i);
	357	sas_init_disc(&port->disc, port);
	358	}
	359	return 0;
	360	}
	361
	362	void sas_unregister_ports(struct sas_ha_struct *sas_ha)
	363	{
	364	int i;
	365
	366	for (i = 0; i < sas_ha->num_phys; i++)
	367	if (sas_ha->sas_phy[i]->port)
90f1e10d	368	sas_deform_port(sas_ha->sas_phy[i], 0);
2908d778 JB	369
2908d778 JB	370	}
1c393b97 JY	371
	372	const work_func_t sas_port_event_fns[PORT_NUM_EVENTS] = {
	373	[PORTE_BYTES_DMAED] = sas_porte_bytes_dmaed,
	374	[PORTE_BROADCAST_RCVD] = sas_porte_broadcast_rcvd,
	375	[PORTE_LINK_RESET_ERR] = sas_porte_link_reset_err,
	376	[PORTE_TIMER_EVENT] = sas_porte_timer_event,
	377	[PORTE_HARD_RESET] = sas_porte_hard_reset,
	378	};