166 lines
4.2 KiB
C
166 lines
4.2 KiB
C
/*
|
|
* Serial Attached SCSI (SAS) Event processing
|
|
*
|
|
* 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/export.h>
|
|
#include <scsi/scsi_host.h>
|
|
#include "sas_internal.h"
|
|
#include "sas_dump.h"
|
|
|
|
void sas_queue_work(struct sas_ha_struct *ha, struct sas_work *sw)
|
|
{
|
|
if (!test_bit(SAS_HA_REGISTERED, &ha->state))
|
|
return;
|
|
|
|
if (test_bit(SAS_HA_DRAINING, &ha->state)) {
|
|
/* add it to the defer list, if not already pending */
|
|
if (list_empty(&sw->drain_node))
|
|
list_add(&sw->drain_node, &ha->defer_q);
|
|
} else
|
|
scsi_queue_work(ha->core.shost, &sw->work);
|
|
}
|
|
|
|
static void sas_queue_event(int event, unsigned long *pending,
|
|
struct sas_work *work,
|
|
struct sas_ha_struct *ha)
|
|
{
|
|
if (!test_and_set_bit(event, pending)) {
|
|
unsigned long flags;
|
|
|
|
spin_lock_irqsave(&ha->state_lock, flags);
|
|
sas_queue_work(ha, work);
|
|
spin_unlock_irqrestore(&ha->state_lock, flags);
|
|
}
|
|
}
|
|
|
|
|
|
void __sas_drain_work(struct sas_ha_struct *ha)
|
|
{
|
|
struct workqueue_struct *wq = ha->core.shost->work_q;
|
|
struct sas_work *sw, *_sw;
|
|
|
|
set_bit(SAS_HA_DRAINING, &ha->state);
|
|
/* flush submitters */
|
|
spin_lock_irq(&ha->state_lock);
|
|
spin_unlock_irq(&ha->state_lock);
|
|
|
|
drain_workqueue(wq);
|
|
|
|
spin_lock_irq(&ha->state_lock);
|
|
clear_bit(SAS_HA_DRAINING, &ha->state);
|
|
list_for_each_entry_safe(sw, _sw, &ha->defer_q, drain_node) {
|
|
list_del_init(&sw->drain_node);
|
|
sas_queue_work(ha, sw);
|
|
}
|
|
spin_unlock_irq(&ha->state_lock);
|
|
}
|
|
|
|
int sas_drain_work(struct sas_ha_struct *ha)
|
|
{
|
|
int err;
|
|
|
|
err = mutex_lock_interruptible(&ha->drain_mutex);
|
|
if (err)
|
|
return err;
|
|
if (test_bit(SAS_HA_REGISTERED, &ha->state))
|
|
__sas_drain_work(ha);
|
|
mutex_unlock(&ha->drain_mutex);
|
|
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL_GPL(sas_drain_work);
|
|
|
|
void sas_disable_revalidation(struct sas_ha_struct *ha)
|
|
{
|
|
mutex_lock(&ha->disco_mutex);
|
|
set_bit(SAS_HA_ATA_EH_ACTIVE, &ha->state);
|
|
mutex_unlock(&ha->disco_mutex);
|
|
}
|
|
|
|
void sas_enable_revalidation(struct sas_ha_struct *ha)
|
|
{
|
|
int i;
|
|
|
|
mutex_lock(&ha->disco_mutex);
|
|
clear_bit(SAS_HA_ATA_EH_ACTIVE, &ha->state);
|
|
for (i = 0; i < ha->num_phys; i++) {
|
|
struct asd_sas_port *port = ha->sas_port[i];
|
|
const int ev = DISCE_REVALIDATE_DOMAIN;
|
|
struct sas_discovery *d = &port->disc;
|
|
|
|
if (!test_and_clear_bit(ev, &d->pending))
|
|
continue;
|
|
|
|
sas_queue_event(ev, &d->pending, &d->disc_work[ev].work, ha);
|
|
}
|
|
mutex_unlock(&ha->disco_mutex);
|
|
}
|
|
|
|
static void notify_ha_event(struct sas_ha_struct *sas_ha, enum ha_event event)
|
|
{
|
|
BUG_ON(event >= HA_NUM_EVENTS);
|
|
|
|
sas_queue_event(event, &sas_ha->pending,
|
|
&sas_ha->ha_events[event].work, sas_ha);
|
|
}
|
|
|
|
static void notify_port_event(struct asd_sas_phy *phy, enum port_event event)
|
|
{
|
|
struct sas_ha_struct *ha = phy->ha;
|
|
|
|
BUG_ON(event >= PORT_NUM_EVENTS);
|
|
|
|
sas_queue_event(event, &phy->port_events_pending,
|
|
&phy->port_events[event].work, ha);
|
|
}
|
|
|
|
static void notify_phy_event(struct asd_sas_phy *phy, enum phy_event event)
|
|
{
|
|
struct sas_ha_struct *ha = phy->ha;
|
|
|
|
BUG_ON(event >= PHY_NUM_EVENTS);
|
|
|
|
sas_queue_event(event, &phy->phy_events_pending,
|
|
&phy->phy_events[event].work, ha);
|
|
}
|
|
|
|
int sas_init_events(struct sas_ha_struct *sas_ha)
|
|
{
|
|
static const work_func_t sas_ha_event_fns[HA_NUM_EVENTS] = {
|
|
[HAE_RESET] = sas_hae_reset,
|
|
};
|
|
|
|
int i;
|
|
|
|
for (i = 0; i < HA_NUM_EVENTS; i++) {
|
|
INIT_SAS_WORK(&sas_ha->ha_events[i].work, sas_ha_event_fns[i]);
|
|
sas_ha->ha_events[i].ha = sas_ha;
|
|
}
|
|
|
|
sas_ha->notify_ha_event = notify_ha_event;
|
|
sas_ha->notify_port_event = notify_port_event;
|
|
sas_ha->notify_phy_event = notify_phy_event;
|
|
|
|
return 0;
|
|
}
|