2 * Serial Attached SCSI (SAS) Event processing
4 * Copyright (C) 2005 Adaptec, Inc. All rights reserved.
5 * Copyright (C) 2005 Luben Tuikov <luben_tuikov@adaptec.com>
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 void sas_queue_work(struct sas_ha_struct *ha, struct work_struct *work)
32 if (!test_bit(SAS_HA_REGISTERED, &ha->state))
35 if (test_bit(SAS_HA_DRAINING, &ha->state))
36 list_add(&work->entry, &ha->defer_q);
38 scsi_queue_work(ha->core.shost, work);
41 static void sas_queue_event(int event, unsigned long *pending,
42 struct work_struct *work,
43 struct sas_ha_struct *ha)
45 if (!test_and_set_bit(event, pending)) {
48 spin_lock_irqsave(&ha->state_lock, flags);
49 sas_queue_work(ha, work);
50 spin_unlock_irqrestore(&ha->state_lock, flags);
55 void __sas_drain_work(struct sas_ha_struct *ha)
57 struct workqueue_struct *wq = ha->core.shost->work_q;
58 struct work_struct *w, *_w;
60 set_bit(SAS_HA_DRAINING, &ha->state);
61 /* flush submitters */
62 spin_lock_irq(&ha->state_lock);
63 spin_unlock_irq(&ha->state_lock);
67 spin_lock_irq(&ha->state_lock);
68 clear_bit(SAS_HA_DRAINING, &ha->state);
69 list_for_each_entry_safe(w, _w, &ha->defer_q, entry) {
70 list_del_init(&w->entry);
71 sas_queue_work(ha, w);
73 spin_unlock_irq(&ha->state_lock);
76 int sas_drain_work(struct sas_ha_struct *ha)
80 err = mutex_lock_interruptible(&ha->drain_mutex);
83 if (test_bit(SAS_HA_REGISTERED, &ha->state))
85 mutex_unlock(&ha->drain_mutex);
89 EXPORT_SYMBOL_GPL(sas_drain_work);
91 void sas_disable_revalidation(struct sas_ha_struct *ha)
93 mutex_lock(&ha->disco_mutex);
94 set_bit(SAS_HA_ATA_EH_ACTIVE, &ha->state);
95 mutex_unlock(&ha->disco_mutex);
98 void sas_enable_revalidation(struct sas_ha_struct *ha)
102 mutex_lock(&ha->disco_mutex);
103 clear_bit(SAS_HA_ATA_EH_ACTIVE, &ha->state);
104 for (i = 0; i < ha->num_phys; i++) {
105 struct asd_sas_port *port = ha->sas_port[i];
106 const int ev = DISCE_REVALIDATE_DOMAIN;
107 struct sas_discovery *d = &port->disc;
109 if (!test_and_clear_bit(ev, &d->pending))
112 sas_queue_event(ev, &d->pending, &d->disc_work[ev].work, ha);
114 mutex_unlock(&ha->disco_mutex);
117 static void notify_ha_event(struct sas_ha_struct *sas_ha, enum ha_event event)
119 BUG_ON(event >= HA_NUM_EVENTS);
121 sas_queue_event(event, &sas_ha->pending,
122 &sas_ha->ha_events[event].work, sas_ha);
125 static void notify_port_event(struct asd_sas_phy *phy, enum port_event event)
127 struct sas_ha_struct *ha = phy->ha;
129 BUG_ON(event >= PORT_NUM_EVENTS);
131 sas_queue_event(event, &phy->port_events_pending,
132 &phy->port_events[event].work, ha);
135 static void notify_phy_event(struct asd_sas_phy *phy, enum phy_event event)
137 struct sas_ha_struct *ha = phy->ha;
139 BUG_ON(event >= PHY_NUM_EVENTS);
141 sas_queue_event(event, &phy->phy_events_pending,
142 &phy->phy_events[event].work, ha);
145 int sas_init_events(struct sas_ha_struct *sas_ha)
147 static const work_func_t sas_ha_event_fns[HA_NUM_EVENTS] = {
148 [HAE_RESET] = sas_hae_reset,
153 for (i = 0; i < HA_NUM_EVENTS; i++) {
154 INIT_WORK(&sas_ha->ha_events[i].work, sas_ha_event_fns[i]);
155 sas_ha->ha_events[i].ha = sas_ha;
158 sas_ha->notify_ha_event = notify_ha_event;
159 sas_ha->notify_port_event = notify_port_event;
160 sas_ha->notify_phy_event = notify_phy_event;