Commit | Line | Data |
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2908d778 JB |
1 | /* |
2 | * Serial Attached SCSI (SAS) Event processing | |
3 | * | |
4 | * Copyright (C) 2005 Adaptec, Inc. All rights reserved. | |
5 | * Copyright (C) 2005 Luben Tuikov <luben_tuikov@adaptec.com> | |
6 | * | |
7 | * This file is licensed under GPLv2. | |
8 | * | |
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. | |
13 | * | |
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. | |
18 | * | |
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 | |
22 | * | |
23 | */ | |
24 | ||
b1124cd3 | 25 | #include <linux/export.h> |
2908d778 JB |
26 | #include <scsi/scsi_host.h> |
27 | #include "sas_internal.h" | |
28 | #include "sas_dump.h" | |
29 | ||
22b9153f | 30 | void sas_queue_work(struct sas_ha_struct *ha, struct sas_work *sw) |
b1124cd3 DW |
31 | { |
32 | if (!test_bit(SAS_HA_REGISTERED, &ha->state)) | |
33 | return; | |
34 | ||
22b9153f DW |
35 | if (test_bit(SAS_HA_DRAINING, &ha->state)) { |
36 | /* add it to the defer list, if not already pending */ | |
37 | if (list_empty(&sw->drain_node)) | |
38 | list_add(&sw->drain_node, &ha->defer_q); | |
39 | } else | |
40 | scsi_queue_work(ha->core.shost, &sw->work); | |
b1124cd3 DW |
41 | } |
42 | ||
43 | static void sas_queue_event(int event, unsigned long *pending, | |
22b9153f | 44 | struct sas_work *work, |
b1124cd3 DW |
45 | struct sas_ha_struct *ha) |
46 | { | |
47 | if (!test_and_set_bit(event, pending)) { | |
48 | unsigned long flags; | |
49 | ||
e4a9c373 | 50 | spin_lock_irqsave(&ha->lock, flags); |
b1124cd3 | 51 | sas_queue_work(ha, work); |
e4a9c373 | 52 | spin_unlock_irqrestore(&ha->lock, flags); |
b1124cd3 DW |
53 | } |
54 | } | |
55 | ||
5d7f6d10 DW |
56 | |
57 | void __sas_drain_work(struct sas_ha_struct *ha) | |
b1124cd3 DW |
58 | { |
59 | struct workqueue_struct *wq = ha->core.shost->work_q; | |
22b9153f | 60 | struct sas_work *sw, *_sw; |
b1124cd3 DW |
61 | |
62 | set_bit(SAS_HA_DRAINING, &ha->state); | |
63 | /* flush submitters */ | |
e4a9c373 DW |
64 | spin_lock_irq(&ha->lock); |
65 | spin_unlock_irq(&ha->lock); | |
b1124cd3 DW |
66 | |
67 | drain_workqueue(wq); | |
68 | ||
e4a9c373 | 69 | spin_lock_irq(&ha->lock); |
b1124cd3 | 70 | clear_bit(SAS_HA_DRAINING, &ha->state); |
22b9153f DW |
71 | list_for_each_entry_safe(sw, _sw, &ha->defer_q, drain_node) { |
72 | list_del_init(&sw->drain_node); | |
73 | sas_queue_work(ha, sw); | |
b1124cd3 | 74 | } |
e4a9c373 | 75 | spin_unlock_irq(&ha->lock); |
5d7f6d10 DW |
76 | } |
77 | ||
78 | int sas_drain_work(struct sas_ha_struct *ha) | |
79 | { | |
80 | int err; | |
81 | ||
82 | err = mutex_lock_interruptible(&ha->drain_mutex); | |
83 | if (err) | |
84 | return err; | |
85 | if (test_bit(SAS_HA_REGISTERED, &ha->state)) | |
86 | __sas_drain_work(ha); | |
b1124cd3 DW |
87 | mutex_unlock(&ha->drain_mutex); |
88 | ||
89 | return 0; | |
90 | } | |
91 | EXPORT_SYMBOL_GPL(sas_drain_work); | |
92 | ||
87c8331f DW |
93 | void sas_disable_revalidation(struct sas_ha_struct *ha) |
94 | { | |
95 | mutex_lock(&ha->disco_mutex); | |
96 | set_bit(SAS_HA_ATA_EH_ACTIVE, &ha->state); | |
97 | mutex_unlock(&ha->disco_mutex); | |
98 | } | |
99 | ||
100 | void sas_enable_revalidation(struct sas_ha_struct *ha) | |
101 | { | |
102 | int i; | |
103 | ||
104 | mutex_lock(&ha->disco_mutex); | |
105 | clear_bit(SAS_HA_ATA_EH_ACTIVE, &ha->state); | |
106 | for (i = 0; i < ha->num_phys; i++) { | |
107 | struct asd_sas_port *port = ha->sas_port[i]; | |
108 | const int ev = DISCE_REVALIDATE_DOMAIN; | |
109 | struct sas_discovery *d = &port->disc; | |
110 | ||
111 | if (!test_and_clear_bit(ev, &d->pending)) | |
112 | continue; | |
113 | ||
114 | sas_queue_event(ev, &d->pending, &d->disc_work[ev].work, ha); | |
115 | } | |
116 | mutex_unlock(&ha->disco_mutex); | |
117 | } | |
118 | ||
2908d778 JB |
119 | static void notify_ha_event(struct sas_ha_struct *sas_ha, enum ha_event event) |
120 | { | |
121 | BUG_ON(event >= HA_NUM_EVENTS); | |
122 | ||
b15ebe0b | 123 | sas_queue_event(event, &sas_ha->pending, |
6b0efb85 | 124 | &sas_ha->ha_events[event].work, sas_ha); |
2908d778 JB |
125 | } |
126 | ||
127 | static void notify_port_event(struct asd_sas_phy *phy, enum port_event event) | |
128 | { | |
129 | struct sas_ha_struct *ha = phy->ha; | |
130 | ||
131 | BUG_ON(event >= PORT_NUM_EVENTS); | |
132 | ||
b15ebe0b | 133 | sas_queue_event(event, &phy->port_events_pending, |
6b0efb85 | 134 | &phy->port_events[event].work, ha); |
2908d778 JB |
135 | } |
136 | ||
303694ee | 137 | void sas_notify_phy_event(struct asd_sas_phy *phy, enum phy_event event) |
2908d778 JB |
138 | { |
139 | struct sas_ha_struct *ha = phy->ha; | |
140 | ||
141 | BUG_ON(event >= PHY_NUM_EVENTS); | |
142 | ||
b15ebe0b | 143 | sas_queue_event(event, &phy->phy_events_pending, |
6b0efb85 | 144 | &phy->phy_events[event].work, ha); |
2908d778 JB |
145 | } |
146 | ||
147 | int sas_init_events(struct sas_ha_struct *sas_ha) | |
148 | { | |
c4028958 | 149 | static const work_func_t sas_ha_event_fns[HA_NUM_EVENTS] = { |
2908d778 JB |
150 | [HAE_RESET] = sas_hae_reset, |
151 | }; | |
152 | ||
153 | int i; | |
154 | ||
c4028958 | 155 | for (i = 0; i < HA_NUM_EVENTS; i++) { |
22b9153f | 156 | INIT_SAS_WORK(&sas_ha->ha_events[i].work, sas_ha_event_fns[i]); |
c4028958 DH |
157 | sas_ha->ha_events[i].ha = sas_ha; |
158 | } | |
2908d778 JB |
159 | |
160 | sas_ha->notify_ha_event = notify_ha_event; | |
161 | sas_ha->notify_port_event = notify_port_event; | |
303694ee | 162 | sas_ha->notify_phy_event = sas_notify_phy_event; |
2908d778 JB |
163 | |
164 | return 0; | |
165 | } |