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