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 phy->in_shutdown = 0; 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 phy->in_shutdown = 0; 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 sas_deform_port(phy, 1); 62 63 if (!port && phy->enabled && i->dft->lldd_control_phy) { 64 phy->error++; 65 switch (phy->error) { 66 case 1: 67 case 2: 68 i->dft->lldd_control_phy(phy, PHY_FUNC_HARD_RESET, 69 NULL); 70 break; 71 case 3: 72 default: 73 phy->error = 0; 74 phy->enabled = 0; 75 i->dft->lldd_control_phy(phy, PHY_FUNC_DISABLE, NULL); 76 break; 77 } 78 } 79 } 80 81 static void sas_phye_spinup_hold(struct work_struct *work) 82 { 83 struct asd_sas_event *ev = to_asd_sas_event(work); 84 struct asd_sas_phy *phy = ev->phy; 85 struct sas_ha_struct *sas_ha = phy->ha; 86 struct sas_internal *i = 87 to_sas_internal(sas_ha->core.shost->transportt); 88 89 phy->error = 0; 90 i->dft->lldd_control_phy(phy, PHY_FUNC_RELEASE_SPINUP_HOLD, NULL); 91 } 92 93 static void sas_phye_resume_timeout(struct work_struct *work) 94 { 95 struct asd_sas_event *ev = to_asd_sas_event(work); 96 struct asd_sas_phy *phy = ev->phy; 97 98 /* phew, lldd got the phy back in the nick of time */ 99 if (!phy->suspended) { 100 dev_info(&phy->phy->dev, "resume timeout cancelled\n"); 101 return; 102 } 103 104 phy->error = 0; 105 phy->suspended = 0; 106 sas_deform_port(phy, 1); 107 } 108 109 110 static void sas_phye_shutdown(struct work_struct *work) 111 { 112 struct asd_sas_event *ev = to_asd_sas_event(work); 113 struct asd_sas_phy *phy = ev->phy; 114 struct sas_ha_struct *sas_ha = phy->ha; 115 struct sas_internal *i = 116 to_sas_internal(sas_ha->core.shost->transportt); 117 118 if (phy->enabled) { 119 int ret; 120 121 phy->error = 0; 122 phy->enabled = 0; 123 ret = i->dft->lldd_control_phy(phy, PHY_FUNC_DISABLE, NULL); 124 if (ret) 125 sas_printk("lldd disable phy%02d returned %d\n", 126 phy->id, ret); 127 } else 128 sas_printk("phy%02d is not enabled, cannot shutdown\n", 129 phy->id); 130 } 131 132 /* ---------- Phy class registration ---------- */ 133 134 int sas_register_phys(struct sas_ha_struct *sas_ha) 135 { 136 int i; 137 138 /* Now register the phys. */ 139 for (i = 0; i < sas_ha->num_phys; i++) { 140 struct asd_sas_phy *phy = sas_ha->sas_phy[i]; 141 142 phy->error = 0; 143 atomic_set(&phy->event_nr, 0); 144 INIT_LIST_HEAD(&phy->port_phy_el); 145 146 phy->port = NULL; 147 phy->ha = sas_ha; 148 spin_lock_init(&phy->frame_rcvd_lock); 149 spin_lock_init(&phy->sas_prim_lock); 150 phy->frame_rcvd_size = 0; 151 152 phy->phy = sas_phy_alloc(&sas_ha->core.shost->shost_gendev, 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 } 172 173 const work_func_t sas_phy_event_fns[PHY_NUM_EVENTS] = { 174 [PHYE_LOSS_OF_SIGNAL] = sas_phye_loss_of_signal, 175 [PHYE_OOB_DONE] = sas_phye_oob_done, 176 [PHYE_OOB_ERROR] = sas_phye_oob_error, 177 [PHYE_SPINUP_HOLD] = sas_phye_spinup_hold, 178 [PHYE_RESUME_TIMEOUT] = sas_phye_resume_timeout, 179 [PHYE_SHUTDOWN] = sas_phye_shutdown, 180 }; 181