This source file includes following definitions.
- sas_queue_work
- sas_queue_event
- __sas_drain_work
- sas_drain_work
- sas_disable_revalidation
- sas_enable_revalidation
- sas_port_event_worker
- sas_phy_event_worker
- sas_notify_port_event
- sas_notify_phy_event
- sas_init_events
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9 #include <linux/export.h>
10 #include <scsi/scsi_host.h>
11 #include "sas_internal.h"
12
13 int sas_queue_work(struct sas_ha_struct *ha, struct sas_work *sw)
14 {
15
16 int rc = 1;
17
18 if (!test_bit(SAS_HA_REGISTERED, &ha->state))
19 return 0;
20
21 if (test_bit(SAS_HA_DRAINING, &ha->state)) {
22
23 if (list_empty(&sw->drain_node))
24 list_add_tail(&sw->drain_node, &ha->defer_q);
25 } else
26 rc = queue_work(ha->event_q, &sw->work);
27
28 return rc;
29 }
30
31 static int sas_queue_event(int event, struct sas_work *work,
32 struct sas_ha_struct *ha)
33 {
34 unsigned long flags;
35 int rc;
36
37 spin_lock_irqsave(&ha->lock, flags);
38 rc = sas_queue_work(ha, work);
39 spin_unlock_irqrestore(&ha->lock, flags);
40
41 return rc;
42 }
43
44
45 void __sas_drain_work(struct sas_ha_struct *ha)
46 {
47 struct sas_work *sw, *_sw;
48 int ret;
49
50 set_bit(SAS_HA_DRAINING, &ha->state);
51
52 spin_lock_irq(&ha->lock);
53 spin_unlock_irq(&ha->lock);
54
55 drain_workqueue(ha->event_q);
56 drain_workqueue(ha->disco_q);
57
58 spin_lock_irq(&ha->lock);
59 clear_bit(SAS_HA_DRAINING, &ha->state);
60 list_for_each_entry_safe(sw, _sw, &ha->defer_q, drain_node) {
61 list_del_init(&sw->drain_node);
62 ret = sas_queue_work(ha, sw);
63 if (ret != 1)
64 sas_free_event(to_asd_sas_event(&sw->work));
65
66 }
67 spin_unlock_irq(&ha->lock);
68 }
69
70 int sas_drain_work(struct sas_ha_struct *ha)
71 {
72 int err;
73
74 err = mutex_lock_interruptible(&ha->drain_mutex);
75 if (err)
76 return err;
77 if (test_bit(SAS_HA_REGISTERED, &ha->state))
78 __sas_drain_work(ha);
79 mutex_unlock(&ha->drain_mutex);
80
81 return 0;
82 }
83 EXPORT_SYMBOL_GPL(sas_drain_work);
84
85 void sas_disable_revalidation(struct sas_ha_struct *ha)
86 {
87 mutex_lock(&ha->disco_mutex);
88 set_bit(SAS_HA_ATA_EH_ACTIVE, &ha->state);
89 mutex_unlock(&ha->disco_mutex);
90 }
91
92 void sas_enable_revalidation(struct sas_ha_struct *ha)
93 {
94 int i;
95
96 mutex_lock(&ha->disco_mutex);
97 clear_bit(SAS_HA_ATA_EH_ACTIVE, &ha->state);
98 for (i = 0; i < ha->num_phys; i++) {
99 struct asd_sas_port *port = ha->sas_port[i];
100 const int ev = DISCE_REVALIDATE_DOMAIN;
101 struct sas_discovery *d = &port->disc;
102 struct asd_sas_phy *sas_phy;
103
104 if (!test_and_clear_bit(ev, &d->pending))
105 continue;
106
107 if (list_empty(&port->phy_list))
108 continue;
109
110 sas_phy = container_of(port->phy_list.next, struct asd_sas_phy,
111 port_phy_el);
112 ha->notify_port_event(sas_phy, PORTE_BROADCAST_RCVD);
113 }
114 mutex_unlock(&ha->disco_mutex);
115 }
116
117
118 static void sas_port_event_worker(struct work_struct *work)
119 {
120 struct asd_sas_event *ev = to_asd_sas_event(work);
121
122 sas_port_event_fns[ev->event](work);
123 sas_free_event(ev);
124 }
125
126 static void sas_phy_event_worker(struct work_struct *work)
127 {
128 struct asd_sas_event *ev = to_asd_sas_event(work);
129
130 sas_phy_event_fns[ev->event](work);
131 sas_free_event(ev);
132 }
133
134 static int sas_notify_port_event(struct asd_sas_phy *phy, enum port_event event)
135 {
136 struct asd_sas_event *ev;
137 struct sas_ha_struct *ha = phy->ha;
138 int ret;
139
140 BUG_ON(event >= PORT_NUM_EVENTS);
141
142 ev = sas_alloc_event(phy);
143 if (!ev)
144 return -ENOMEM;
145
146 INIT_SAS_EVENT(ev, sas_port_event_worker, phy, event);
147
148 ret = sas_queue_event(event, &ev->work, ha);
149 if (ret != 1)
150 sas_free_event(ev);
151
152 return ret;
153 }
154
155 int sas_notify_phy_event(struct asd_sas_phy *phy, enum phy_event event)
156 {
157 struct asd_sas_event *ev;
158 struct sas_ha_struct *ha = phy->ha;
159 int ret;
160
161 BUG_ON(event >= PHY_NUM_EVENTS);
162
163 ev = sas_alloc_event(phy);
164 if (!ev)
165 return -ENOMEM;
166
167 INIT_SAS_EVENT(ev, sas_phy_event_worker, phy, event);
168
169 ret = sas_queue_event(event, &ev->work, ha);
170 if (ret != 1)
171 sas_free_event(ev);
172
173 return ret;
174 }
175
176 int sas_init_events(struct sas_ha_struct *sas_ha)
177 {
178 sas_ha->notify_port_event = sas_notify_port_event;
179 sas_ha->notify_phy_event = sas_notify_phy_event;
180
181 return 0;
182 }