mirror of https://gitee.com/openkylin/linux.git
179 lines
4.8 KiB
C
179 lines
4.8 KiB
C
/*
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* Serial Attached SCSI (SAS) Phy class
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*
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* Copyright (C) 2005 Adaptec, Inc. All rights reserved.
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* Copyright (C) 2005 Luben Tuikov <luben_tuikov@adaptec.com>
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*
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* This file is licensed under GPLv2.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of the
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* License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*
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*/
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#include "sas_internal.h"
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#include <scsi/scsi_host.h>
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#include <scsi/scsi_transport.h>
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#include <scsi/scsi_transport_sas.h>
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#include "../scsi_sas_internal.h"
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/* ---------- Phy events ---------- */
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static void sas_phye_loss_of_signal(struct work_struct *work)
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{
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struct asd_sas_event *ev = to_asd_sas_event(work);
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struct asd_sas_phy *phy = ev->phy;
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phy->error = 0;
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sas_deform_port(phy, 1);
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}
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static void sas_phye_oob_done(struct work_struct *work)
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{
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struct asd_sas_event *ev = to_asd_sas_event(work);
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struct asd_sas_phy *phy = ev->phy;
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phy->error = 0;
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}
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static void sas_phye_oob_error(struct work_struct *work)
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{
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struct asd_sas_event *ev = to_asd_sas_event(work);
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struct asd_sas_phy *phy = ev->phy;
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struct sas_ha_struct *sas_ha = phy->ha;
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struct asd_sas_port *port = phy->port;
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struct sas_internal *i =
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to_sas_internal(sas_ha->core.shost->transportt);
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sas_deform_port(phy, 1);
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if (!port && phy->enabled && i->dft->lldd_control_phy) {
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phy->error++;
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switch (phy->error) {
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case 1:
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case 2:
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i->dft->lldd_control_phy(phy, PHY_FUNC_HARD_RESET,
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NULL);
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break;
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case 3:
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default:
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phy->error = 0;
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phy->enabled = 0;
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i->dft->lldd_control_phy(phy, PHY_FUNC_DISABLE, NULL);
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break;
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}
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}
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}
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static void sas_phye_spinup_hold(struct work_struct *work)
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{
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struct asd_sas_event *ev = to_asd_sas_event(work);
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struct asd_sas_phy *phy = ev->phy;
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struct sas_ha_struct *sas_ha = phy->ha;
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struct sas_internal *i =
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to_sas_internal(sas_ha->core.shost->transportt);
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phy->error = 0;
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i->dft->lldd_control_phy(phy, PHY_FUNC_RELEASE_SPINUP_HOLD, NULL);
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}
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static void sas_phye_resume_timeout(struct work_struct *work)
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{
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struct asd_sas_event *ev = to_asd_sas_event(work);
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struct asd_sas_phy *phy = ev->phy;
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/* phew, lldd got the phy back in the nick of time */
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if (!phy->suspended) {
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dev_info(&phy->phy->dev, "resume timeout cancelled\n");
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return;
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}
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phy->error = 0;
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phy->suspended = 0;
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sas_deform_port(phy, 1);
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}
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static void sas_phye_shutdown(struct work_struct *work)
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{
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struct asd_sas_event *ev = to_asd_sas_event(work);
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struct asd_sas_phy *phy = ev->phy;
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struct sas_ha_struct *sas_ha = phy->ha;
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struct sas_internal *i =
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to_sas_internal(sas_ha->core.shost->transportt);
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if (phy->enabled) {
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int ret;
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phy->error = 0;
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phy->enabled = 0;
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ret = i->dft->lldd_control_phy(phy, PHY_FUNC_DISABLE, NULL);
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if (ret)
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pr_notice("lldd disable phy%d returned %d\n", phy->id,
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ret);
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} else
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pr_notice("phy%d is not enabled, cannot shutdown\n", phy->id);
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phy->in_shutdown = 0;
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}
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/* ---------- Phy class registration ---------- */
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int sas_register_phys(struct sas_ha_struct *sas_ha)
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{
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int i;
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/* Now register the phys. */
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for (i = 0; i < sas_ha->num_phys; i++) {
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struct asd_sas_phy *phy = sas_ha->sas_phy[i];
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phy->error = 0;
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atomic_set(&phy->event_nr, 0);
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INIT_LIST_HEAD(&phy->port_phy_el);
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phy->port = NULL;
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phy->ha = sas_ha;
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spin_lock_init(&phy->frame_rcvd_lock);
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spin_lock_init(&phy->sas_prim_lock);
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phy->frame_rcvd_size = 0;
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phy->phy = sas_phy_alloc(&sas_ha->core.shost->shost_gendev, i);
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if (!phy->phy)
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return -ENOMEM;
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phy->phy->identify.initiator_port_protocols =
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phy->iproto;
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phy->phy->identify.target_port_protocols = phy->tproto;
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phy->phy->identify.sas_address = SAS_ADDR(sas_ha->sas_addr);
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phy->phy->identify.phy_identifier = i;
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phy->phy->minimum_linkrate_hw = SAS_LINK_RATE_UNKNOWN;
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phy->phy->maximum_linkrate_hw = SAS_LINK_RATE_UNKNOWN;
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phy->phy->minimum_linkrate = SAS_LINK_RATE_UNKNOWN;
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phy->phy->maximum_linkrate = SAS_LINK_RATE_UNKNOWN;
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phy->phy->negotiated_linkrate = SAS_LINK_RATE_UNKNOWN;
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sas_phy_add(phy->phy);
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}
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return 0;
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}
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const work_func_t sas_phy_event_fns[PHY_NUM_EVENTS] = {
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[PHYE_LOSS_OF_SIGNAL] = sas_phye_loss_of_signal,
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[PHYE_OOB_DONE] = sas_phye_oob_done,
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[PHYE_OOB_ERROR] = sas_phye_oob_error,
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[PHYE_SPINUP_HOLD] = sas_phye_spinup_hold,
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[PHYE_RESUME_TIMEOUT] = sas_phye_resume_timeout,
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[PHYE_SHUTDOWN] = sas_phye_shutdown,
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};
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