2 * Serial Attached SCSI (SAS) Event processing
4 * Copyright (C) 2005 Adaptec, Inc. All rights reserved.
7 * This file is licensed under GPLv2.
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.
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.
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
25 #include <linux/export.h>
26 #include <scsi/scsi_host.h>
27 #include "sas_internal.h"
30 int sas_queue_work(struct sas_ha_struct *ha, struct sas_work *sw)
32 /* it's added to the defer_q when draining so return succeed */
35 if (!test_bit(SAS_HA_REGISTERED, &ha->state))
38 if (test_bit(SAS_HA_DRAINING, &ha->state)) {
39 /* add it to the defer list, if not already pending */
40 if (list_empty(&sw->drain_node))
41 list_add_tail(&sw->drain_node, &ha->defer_q);
43 rc = queue_work(ha->event_q, &sw->work);
48 static int sas_queue_event(int event, struct sas_work *work,
49 struct sas_ha_struct *ha)
54 spin_lock_irqsave(&ha->lock, flags);
55 rc = sas_queue_work(ha, work);
56 spin_unlock_irqrestore(&ha->lock, flags);
62 void __sas_drain_work(struct sas_ha_struct *ha)
64 struct sas_work *sw, *_sw;
67 set_bit(SAS_HA_DRAINING, &ha->state);
68 /* flush submitters */
69 spin_lock_irq(&ha->lock);
70 spin_unlock_irq(&ha->lock);
72 drain_workqueue(ha->event_q);
73 drain_workqueue(ha->disco_q);
75 spin_lock_irq(&ha->lock);
76 clear_bit(SAS_HA_DRAINING, &ha->state);
77 list_for_each_entry_safe(sw, _sw, &ha->defer_q, drain_node) {
78 list_del_init(&sw->drain_node);
79 ret = sas_queue_work(ha, sw);
81 sas_free_event(to_asd_sas_event(&sw->work));
84 spin_unlock_irq(&ha->lock);
87 int sas_drain_work(struct sas_ha_struct *ha)
91 err = mutex_lock_interruptible(&ha->drain_mutex);
94 if (test_bit(SAS_HA_REGISTERED, &ha->state))
96 mutex_unlock(&ha->drain_mutex);
100 EXPORT_SYMBOL_GPL(sas_drain_work);
102 void sas_disable_revalidation(struct sas_ha_struct *ha)
104 mutex_lock(&ha->disco_mutex);
105 set_bit(SAS_HA_ATA_EH_ACTIVE, &ha->state);
106 mutex_unlock(&ha->disco_mutex);
109 void sas_enable_revalidation(struct sas_ha_struct *ha)
113 mutex_lock(&ha->disco_mutex);
114 clear_bit(SAS_HA_ATA_EH_ACTIVE, &ha->state);
115 for (i = 0; i < ha->num_phys; i++) {
116 struct asd_sas_port *port = ha->sas_port[i];
117 const int ev = DISCE_REVALIDATE_DOMAIN;
118 struct sas_discovery *d = &port->disc;
119 struct asd_sas_phy *sas_phy;
121 if (!test_and_clear_bit(ev, &d->pending))
124 if (list_empty(&port->phy_list))
127 sas_phy = container_of(port->phy_list.next, struct asd_sas_phy,
129 ha->notify_port_event(sas_phy, PORTE_BROADCAST_RCVD);
131 mutex_unlock(&ha->disco_mutex);
135 static void sas_port_event_worker(struct work_struct *work)
137 struct asd_sas_event *ev = to_asd_sas_event(work);
139 sas_port_event_fns[ev->event](work);
143 static void sas_phy_event_worker(struct work_struct *work)
145 struct asd_sas_event *ev = to_asd_sas_event(work);
147 sas_phy_event_fns[ev->event](work);
151 static int sas_notify_port_event(struct asd_sas_phy *phy, enum port_event event)
153 struct asd_sas_event *ev;
154 struct sas_ha_struct *ha = phy->ha;
157 BUG_ON(event >= PORT_NUM_EVENTS);
159 ev = sas_alloc_event(phy);
163 INIT_SAS_EVENT(ev, sas_port_event_worker, phy, event);
165 ret = sas_queue_event(event, &ev->work, ha);
172 int sas_notify_phy_event(struct asd_sas_phy *phy, enum phy_event event)
174 struct asd_sas_event *ev;
175 struct sas_ha_struct *ha = phy->ha;
178 BUG_ON(event >= PHY_NUM_EVENTS);
180 ev = sas_alloc_event(phy);
184 INIT_SAS_EVENT(ev, sas_phy_event_worker, phy, event);
186 ret = sas_queue_event(event, &ev->work, ha);
193 int sas_init_events(struct sas_ha_struct *sas_ha)
195 sas_ha->notify_port_event = sas_notify_port_event;
196 sas_ha->notify_phy_event = sas_notify_phy_event;