1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
|
// SPDX-License-Identifier: GPL-2.0
/*
* Serial Attached SCSI (SAS) Event processing
*
* Copyright (C) 2005 Adaptec, Inc. All rights reserved.
* Copyright (C) 2005 Luben Tuikov <luben_tuikov@adaptec.com>
*/
#include <linux/export.h>
#include <scsi/scsi_host.h>
#include "sas_internal.h"
int sas_queue_work(struct sas_ha_struct *ha, struct sas_work *sw)
{
/* it's added to the defer_q when draining so return succeed */
int rc = 1;
if (!test_bit(SAS_HA_REGISTERED, &ha->state))
return 0;
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_tail(&sw->drain_node, &ha->defer_q);
} else
rc = queue_work(ha->event_q, &sw->work);
return rc;
}
static int sas_queue_event(int event, struct sas_work *work,
struct sas_ha_struct *ha)
{
unsigned long flags;
int rc;
spin_lock_irqsave(&ha->lock, flags);
rc = sas_queue_work(ha, work);
spin_unlock_irqrestore(&ha->lock, flags);
return rc;
}
void __sas_drain_work(struct sas_ha_struct *ha)
{
struct sas_work *sw, *_sw;
int ret;
set_bit(SAS_HA_DRAINING, &ha->state);
/* flush submitters */
spin_lock_irq(&ha->lock);
spin_unlock_irq(&ha->lock);
drain_workqueue(ha->event_q);
drain_workqueue(ha->disco_q);
spin_lock_irq(&ha->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);
ret = sas_queue_work(ha, sw);
if (ret != 1)
sas_free_event(to_asd_sas_event(&sw->work));
}
spin_unlock_irq(&ha->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;
struct asd_sas_phy *sas_phy;
if (!test_and_clear_bit(ev, &d->pending))
continue;
if (list_empty(&port->phy_list))
continue;
sas_phy = container_of(port->phy_list.next, struct asd_sas_phy,
port_phy_el);
sas_notify_port_event(sas_phy,
PORTE_BROADCAST_RCVD, GFP_KERNEL);
}
mutex_unlock(&ha->disco_mutex);
}
static void sas_port_event_worker(struct work_struct *work)
{
struct asd_sas_event *ev = to_asd_sas_event(work);
sas_port_event_fns[ev->event](work);
sas_free_event(ev);
}
static void sas_phy_event_worker(struct work_struct *work)
{
struct asd_sas_event *ev = to_asd_sas_event(work);
sas_phy_event_fns[ev->event](work);
sas_free_event(ev);
}
int sas_notify_port_event(struct asd_sas_phy *phy, enum port_event event,
gfp_t gfp_flags)
{
struct sas_ha_struct *ha = phy->ha;
struct asd_sas_event *ev;
int ret;
BUG_ON(event >= PORT_NUM_EVENTS);
ev = sas_alloc_event(phy, gfp_flags);
if (!ev)
return -ENOMEM;
INIT_SAS_EVENT(ev, sas_port_event_worker, phy, event);
ret = sas_queue_event(event, &ev->work, ha);
if (ret != 1)
sas_free_event(ev);
return ret;
}
EXPORT_SYMBOL_GPL(sas_notify_port_event);
int sas_notify_phy_event(struct asd_sas_phy *phy, enum phy_event event,
gfp_t gfp_flags)
{
struct sas_ha_struct *ha = phy->ha;
struct asd_sas_event *ev;
int ret;
BUG_ON(event >= PHY_NUM_EVENTS);
ev = sas_alloc_event(phy, gfp_flags);
if (!ev)
return -ENOMEM;
INIT_SAS_EVENT(ev, sas_phy_event_worker, phy, event);
ret = sas_queue_event(event, &ev->work, ha);
if (ret != 1)
sas_free_event(ev);
return ret;
}
EXPORT_SYMBOL_GPL(sas_notify_phy_event);
|
