1 // SPDX-License-Identifier: GPL-2.0 2 /* 3 * Serial Attached SCSI (SAS) Phy class 4 * 5 * Copyright (C) 2005 Adaptec, Inc. All rights reserved. 6 * Copyright (C) 2005 Luben Tuikov <luben_tuikov@adaptec.com> 7 */ 8 9 #include "sas_internal.h" 10 #include <scsi/scsi_host.h> 11 #include <scsi/scsi_transport.h> 12 #include <scsi/scsi_transport_sas.h> 13 #include "scsi_sas_internal.h" 14 15 /* ---------- Phy events ---------- */ 16 17 static void sas_phye_loss_of_signal(struct work_struct *work) 18 { 19 struct asd_sas_event *ev = to_asd_sas_event(work); 20 struct asd_sas_phy *phy = ev->phy; 21 22 phy->error = 0; 23 sas_deform_port(phy, 1); 24 } 25 26 static void sas_phye_oob_done(struct work_struct *work) 27 { 28 struct asd_sas_event *ev = to_asd_sas_event(work); 29 struct asd_sas_phy *phy = ev->phy; 30 31 phy->error = 0; 32 } 33 34 static void sas_phye_oob_error(struct work_struct *work) 35 { 36 struct asd_sas_event *ev = to_asd_sas_event(work); 37 struct asd_sas_phy *phy = ev->phy; 38 struct sas_ha_struct *sas_ha = phy->ha; 39 struct asd_sas_port *port = phy->port; 40 struct sas_internal *i = 41 to_sas_internal(sas_ha->core.shost->transportt); 42 43 sas_deform_port(phy, 1); 44 45 if (!port && phy->enabled && i->dft->lldd_control_phy) { 46 phy->error++; 47 switch (phy->error) { 48 case 1: 49 case 2: 50 i->dft->lldd_control_phy(phy, PHY_FUNC_HARD_RESET, 51 NULL); 52 break; 53 case 3: 54 default: 55 phy->error = 0; 56 phy->enabled = 0; 57 i->dft->lldd_control_phy(phy, PHY_FUNC_DISABLE, NULL); 58 break; 59 } 60 } 61 } 62 63 static void sas_phye_spinup_hold(struct work_struct *work) 64 { 65 struct asd_sas_event *ev = to_asd_sas_event(work); 66 struct asd_sas_phy *phy = ev->phy; 67 struct sas_ha_struct *sas_ha = phy->ha; 68 struct sas_internal *i = 69 to_sas_internal(sas_ha->core.shost->transportt); 70 71 phy->error = 0; 72 i->dft->lldd_control_phy(phy, PHY_FUNC_RELEASE_SPINUP_HOLD, NULL); 73 } 74 75 static void sas_phye_resume_timeout(struct work_struct *work) 76 { 77 struct asd_sas_event *ev = to_asd_sas_event(work); 78 struct asd_sas_phy *phy = ev->phy; 79 80 /* phew, lldd got the phy back in the nick of time */ 81 if (!phy->suspended) { 82 dev_info(&phy->phy->dev, "resume timeout cancelled\n"); 83 return; 84 } 85 86 phy->error = 0; 87 phy->suspended = 0; 88 sas_deform_port(phy, 1); 89 } 90 91 92 static void sas_phye_shutdown(struct work_struct *work) 93 { 94 struct asd_sas_event *ev = to_asd_sas_event(work); 95 struct asd_sas_phy *phy = ev->phy; 96 struct sas_ha_struct *sas_ha = phy->ha; 97 struct sas_internal *i = 98 to_sas_internal(sas_ha->core.shost->transportt); 99 100 if (phy->enabled) { 101 int ret; 102 103 phy->error = 0; 104 phy->enabled = 0; 105 ret = i->dft->lldd_control_phy(phy, PHY_FUNC_DISABLE, NULL); 106 if (ret) 107 pr_notice("lldd disable phy%d returned %d\n", phy->id, 108 ret); 109 } else 110 pr_notice("phy%d is not enabled, cannot shutdown\n", phy->id); 111 phy->in_shutdown = 0; 112 } 113 114 /* ---------- Phy class registration ---------- */ 115 116 int sas_register_phys(struct sas_ha_struct *sas_ha) 117 { 118 int i; 119 120 /* Now register the phys. */ 121 for (i = 0; i < sas_ha->num_phys; i++) { 122 struct asd_sas_phy *phy = sas_ha->sas_phy[i]; 123 124 phy->error = 0; 125 atomic_set(&phy->event_nr, 0); 126 INIT_LIST_HEAD(&phy->port_phy_el); 127 128 phy->port = NULL; 129 phy->ha = sas_ha; 130 spin_lock_init(&phy->frame_rcvd_lock); 131 spin_lock_init(&phy->sas_prim_lock); 132 phy->frame_rcvd_size = 0; 133 134 phy->phy = sas_phy_alloc(&sas_ha->core.shost->shost_gendev, i); 135 if (!phy->phy) 136 return -ENOMEM; 137 138 phy->phy->identify.initiator_port_protocols = 139 phy->iproto; 140 phy->phy->identify.target_port_protocols = phy->tproto; 141 phy->phy->identify.sas_address = SAS_ADDR(sas_ha->sas_addr); 142 phy->phy->identify.phy_identifier = i; 143 phy->phy->minimum_linkrate_hw = SAS_LINK_RATE_UNKNOWN; 144 phy->phy->maximum_linkrate_hw = SAS_LINK_RATE_UNKNOWN; 145 phy->phy->minimum_linkrate = SAS_LINK_RATE_UNKNOWN; 146 phy->phy->maximum_linkrate = SAS_LINK_RATE_UNKNOWN; 147 phy->phy->negotiated_linkrate = SAS_LINK_RATE_UNKNOWN; 148 149 sas_phy_add(phy->phy); 150 } 151 152 return 0; 153 } 154 155 const work_func_t sas_phy_event_fns[PHY_NUM_EVENTS] = { 156 [PHYE_LOSS_OF_SIGNAL] = sas_phye_loss_of_signal, 157 [PHYE_OOB_DONE] = sas_phye_oob_done, 158 [PHYE_OOB_ERROR] = sas_phye_oob_error, 159 [PHYE_SPINUP_HOLD] = sas_phye_spinup_hold, 160 [PHYE_RESUME_TIMEOUT] = sas_phye_resume_timeout, 161 [PHYE_SHUTDOWN] = sas_phye_shutdown, 162 }; 163