e0f5018e90718db91a4c20d30d08734775e40e43
[linux-2.6.git] / drivers / scsi / libsas / sas_phy.c
1 /*
2  * Serial Attached SCSI (SAS) Phy class
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
25 #include "sas_internal.h"
26 #include <scsi/scsi_host.h>
27 #include <scsi/scsi_transport.h>
28 #include <scsi/scsi_transport_sas.h>
29 #include "../scsi_sas_internal.h"
30
31 /* ---------- Phy events ---------- */
32
33 static void sas_phye_loss_of_signal(struct work_struct *work)
34 {
35         struct asd_sas_event *ev =
36                 container_of(work, struct asd_sas_event, work);
37         struct asd_sas_phy *phy = ev->phy;
38
39         sas_begin_event(PHYE_LOSS_OF_SIGNAL, &phy->ha->event_lock,
40                         &phy->phy_events_pending);
41         phy->error = 0;
42         sas_deform_port(phy, 1);
43 }
44
45 static void sas_phye_oob_done(struct work_struct *work)
46 {
47         struct asd_sas_event *ev =
48                 container_of(work, struct asd_sas_event, work);
49         struct asd_sas_phy *phy = ev->phy;
50
51         sas_begin_event(PHYE_OOB_DONE, &phy->ha->event_lock,
52                         &phy->phy_events_pending);
53         phy->error = 0;
54 }
55
56 static void sas_phye_oob_error(struct work_struct *work)
57 {
58         struct asd_sas_event *ev =
59                 container_of(work, struct asd_sas_event, work);
60         struct asd_sas_phy *phy = ev->phy;
61         struct sas_ha_struct *sas_ha = phy->ha;
62         struct asd_sas_port *port = phy->port;
63         struct sas_internal *i =
64                 to_sas_internal(sas_ha->core.shost->transportt);
65
66         sas_begin_event(PHYE_OOB_ERROR, &phy->ha->event_lock,
67                         &phy->phy_events_pending);
68
69         sas_deform_port(phy, 1);
70
71         if (!port && phy->enabled && i->dft->lldd_control_phy) {
72                 phy->error++;
73                 switch (phy->error) {
74                 case 1:
75                 case 2:
76                         i->dft->lldd_control_phy(phy, PHY_FUNC_HARD_RESET,
77                                                  NULL);
78                         break;
79                 case 3:
80                 default:
81                         phy->error = 0;
82                         phy->enabled = 0;
83                         i->dft->lldd_control_phy(phy, PHY_FUNC_DISABLE, NULL);
84                         break;
85                 }
86         }
87 }
88
89 static void sas_phye_spinup_hold(struct work_struct *work)
90 {
91         struct asd_sas_event *ev =
92                 container_of(work, struct asd_sas_event, work);
93         struct asd_sas_phy *phy = ev->phy;
94         struct sas_ha_struct *sas_ha = phy->ha;
95         struct sas_internal *i =
96                 to_sas_internal(sas_ha->core.shost->transportt);
97
98         sas_begin_event(PHYE_SPINUP_HOLD, &phy->ha->event_lock,
99                         &phy->phy_events_pending);
100
101         phy->error = 0;
102         i->dft->lldd_control_phy(phy, PHY_FUNC_RELEASE_SPINUP_HOLD, NULL);
103 }
104
105 /* ---------- Phy class registration ---------- */
106
107 int sas_register_phys(struct sas_ha_struct *sas_ha)
108 {
109         int i;
110
111         static const work_func_t sas_phy_event_fns[PHY_NUM_EVENTS] = {
112                 [PHYE_LOSS_OF_SIGNAL] = sas_phye_loss_of_signal,
113                 [PHYE_OOB_DONE] = sas_phye_oob_done,
114                 [PHYE_OOB_ERROR] = sas_phye_oob_error,
115                 [PHYE_SPINUP_HOLD] = sas_phye_spinup_hold,
116         };
117
118         static const work_func_t sas_port_event_fns[PORT_NUM_EVENTS] = {
119                 [PORTE_BYTES_DMAED] = sas_porte_bytes_dmaed,
120                 [PORTE_BROADCAST_RCVD] = sas_porte_broadcast_rcvd,
121                 [PORTE_LINK_RESET_ERR] = sas_porte_link_reset_err,
122                 [PORTE_TIMER_EVENT] = sas_porte_timer_event,
123                 [PORTE_HARD_RESET] = sas_porte_hard_reset,
124         };
125
126         /* Now register the phys. */
127         for (i = 0; i < sas_ha->num_phys; i++) {
128                 int k;
129                 struct asd_sas_phy *phy = sas_ha->sas_phy[i];
130
131                 phy->error = 0;
132                 INIT_LIST_HEAD(&phy->port_phy_el);
133                 for (k = 0; k < PORT_NUM_EVENTS; k++) {
134                         INIT_WORK(&phy->port_events[k].work,
135                                   sas_port_event_fns[k]);
136                         phy->port_events[k].phy = phy;
137                 }
138
139                 for (k = 0; k < PHY_NUM_EVENTS; k++) {
140                         INIT_WORK(&phy->phy_events[k].work,
141                                   sas_phy_event_fns[k]);
142                         phy->phy_events[k].phy = phy;
143                 }
144
145                 phy->port = NULL;
146                 phy->ha = sas_ha;
147                 spin_lock_init(&phy->frame_rcvd_lock);
148                 spin_lock_init(&phy->sas_prim_lock);
149                 phy->frame_rcvd_size = 0;
150
151                 phy->phy = sas_phy_alloc(&sas_ha->core.shost->shost_gendev,
152                                          i);
153                 if (!phy->phy)
154                         return -ENOMEM;
155
156                 phy->phy->identify.initiator_port_protocols =
157                         phy->iproto;
158                 phy->phy->identify.target_port_protocols = phy->tproto;
159                 phy->phy->identify.sas_address = SAS_ADDR(sas_ha->sas_addr);
160                 phy->phy->identify.phy_identifier = i;
161                 phy->phy->minimum_linkrate_hw = SAS_LINK_RATE_UNKNOWN;
162                 phy->phy->maximum_linkrate_hw = SAS_LINK_RATE_UNKNOWN;
163                 phy->phy->minimum_linkrate = SAS_LINK_RATE_UNKNOWN;
164                 phy->phy->maximum_linkrate = SAS_LINK_RATE_UNKNOWN;
165                 phy->phy->negotiated_linkrate = SAS_LINK_RATE_UNKNOWN;
166
167                 sas_phy_add(phy->phy);
168         }
169
170         return 0;
171 }