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);
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);
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 }
172
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