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 = to_asd_sas_event(work); 36 struct asd_sas_phy *phy = ev->phy; 37 38 clear_bit(PHYE_LOSS_OF_SIGNAL, &phy->phy_events_pending); 39 phy->error = 0; 40 sas_deform_port(phy, 1); 41 } 42 43 static void sas_phye_oob_done(struct work_struct *work) 44 { 45 struct asd_sas_event *ev = to_asd_sas_event(work); 46 struct asd_sas_phy *phy = ev->phy; 47 48 clear_bit(PHYE_OOB_DONE, &phy->phy_events_pending); 49 phy->error = 0; 50 } 51 52 static void sas_phye_oob_error(struct work_struct *work) 53 { 54 struct asd_sas_event *ev = to_asd_sas_event(work); 55 struct asd_sas_phy *phy = ev->phy; 56 struct sas_ha_struct *sas_ha = phy->ha; 57 struct asd_sas_port *port = phy->port; 58 struct sas_internal *i = 59 to_sas_internal(sas_ha->core.shost->transportt); 60 61 clear_bit(PHYE_OOB_ERROR, &phy->phy_events_pending); 62 63 sas_deform_port(phy, 1); 64 65 if (!port && phy->enabled && i->dft->lldd_control_phy) { 66 phy->error++; 67 switch (phy->error) { 68 case 1: 69 case 2: 70 i->dft->lldd_control_phy(phy, PHY_FUNC_HARD_RESET, 71 NULL); 72 break; 73 case 3: 74 default: 75 phy->error = 0; 76 phy->enabled = 0; 77 i->dft->lldd_control_phy(phy, PHY_FUNC_DISABLE, NULL); 78 break; 79 } 80 } 81 } 82 83 static void sas_phye_spinup_hold(struct work_struct *work) 84 { 85 struct asd_sas_event *ev = to_asd_sas_event(work); 86 struct asd_sas_phy *phy = ev->phy; 87 struct sas_ha_struct *sas_ha = phy->ha; 88 struct sas_internal *i = 89 to_sas_internal(sas_ha->core.shost->transportt); 90 91 clear_bit(PHYE_SPINUP_HOLD, &phy->phy_events_pending); 92 93 phy->error = 0; 94 i->dft->lldd_control_phy(phy, PHY_FUNC_RELEASE_SPINUP_HOLD, NULL); 95 } 96 97 static void sas_phye_resume_timeout(struct work_struct *work) 98 { 99 struct asd_sas_event *ev = to_asd_sas_event(work); 100 struct asd_sas_phy *phy = ev->phy; 101 102 clear_bit(PHYE_RESUME_TIMEOUT, &phy->phy_events_pending); 103 104 /* phew, lldd got the phy back in the nick of time */ 105 if (!phy->suspended) { 106 dev_info(&phy->phy->dev, "resume timeout cancelled\n"); 107 return; 108 } 109 110 phy->error = 0; 111 phy->suspended = 0; 112 sas_deform_port(phy, 1); 113 } 114 115 116 /* ---------- Phy class registration ---------- */ 117 118 int sas_register_phys(struct sas_ha_struct *sas_ha) 119 { 120 int i; 121 122 static const work_func_t sas_phy_event_fns[PHY_NUM_EVENTS] = { 123 [PHYE_LOSS_OF_SIGNAL] = sas_phye_loss_of_signal, 124 [PHYE_OOB_DONE] = sas_phye_oob_done, 125 [PHYE_OOB_ERROR] = sas_phye_oob_error, 126 [PHYE_SPINUP_HOLD] = sas_phye_spinup_hold, 127 [PHYE_RESUME_TIMEOUT] = sas_phye_resume_timeout, 128 129 }; 130 131 static const work_func_t sas_port_event_fns[PORT_NUM_EVENTS] = { 132 [PORTE_BYTES_DMAED] = sas_porte_bytes_dmaed, 133 [PORTE_BROADCAST_RCVD] = sas_porte_broadcast_rcvd, 134 [PORTE_LINK_RESET_ERR] = sas_porte_link_reset_err, 135 [PORTE_TIMER_EVENT] = sas_porte_timer_event, 136 [PORTE_HARD_RESET] = sas_porte_hard_reset, 137 }; 138 139 /* Now register the phys. */ 140 for (i = 0; i < sas_ha->num_phys; i++) { 141 int k; 142 struct asd_sas_phy *phy = sas_ha->sas_phy[i]; 143 144 phy->error = 0; 145 INIT_LIST_HEAD(&phy->port_phy_el); 146 for (k = 0; k < PORT_NUM_EVENTS; k++) { 147 INIT_SAS_WORK(&phy->port_events[k].work, sas_port_event_fns[k]); 148 phy->port_events[k].phy = phy; 149 } 150 151 for (k = 0; k < PHY_NUM_EVENTS; k++) { 152 INIT_SAS_WORK(&phy->phy_events[k].work, sas_phy_event_fns[k]); 153 phy->phy_events[k].phy = phy; 154 } 155 156 phy->port = NULL; 157 phy->ha = sas_ha; 158 spin_lock_init(&phy->frame_rcvd_lock); 159 spin_lock_init(&phy->sas_prim_lock); 160 phy->frame_rcvd_size = 0; 161 162 phy->phy = sas_phy_alloc(&sas_ha->core.shost->shost_gendev, i); 163 if (!phy->phy) 164 return -ENOMEM; 165 166 phy->phy->identify.initiator_port_protocols = 167 phy->iproto; 168 phy->phy->identify.target_port_protocols = phy->tproto; 169 phy->phy->identify.sas_address = SAS_ADDR(sas_ha->sas_addr); 170 phy->phy->identify.phy_identifier = i; 171 phy->phy->minimum_linkrate_hw = SAS_LINK_RATE_UNKNOWN; 172 phy->phy->maximum_linkrate_hw = SAS_LINK_RATE_UNKNOWN; 173 phy->phy->minimum_linkrate = SAS_LINK_RATE_UNKNOWN; 174 phy->phy->maximum_linkrate = SAS_LINK_RATE_UNKNOWN; 175 phy->phy->negotiated_linkrate = SAS_LINK_RATE_UNKNOWN; 176 177 sas_phy_add(phy->phy); 178 } 179 180 return 0; 181 } 182