drivers/scsi/isci/port.h

   1 /*
   2  * This file is provided under a dual BSD/GPLv2 license.  When using or
   3  * redistributing this file, you may do so under either license.
   4  *
   5  * GPL LICENSE SUMMARY
   6  *
   7  * Copyright(c) 2008 - 2011 Intel Corporation. All rights reserved.
   8  *
   9  * This program is free software; you can redistribute it and/or modify
  10  * it under the terms of version 2 of the GNU General Public License as
  11  * published by the Free Software Foundation.
  12  *
  13  * This program is distributed in the hope that it will be useful, but
  14  * WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  16  * General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU General Public License
  19  * along with this program; if not, write to the Free Software
  20  * Foundation, Inc., 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
  21  * The full GNU General Public License is included in this distribution
  22  * in the file called LICENSE.GPL.
  23  *
  24  * BSD LICENSE
  25  *
  26  * Copyright(c) 2008 - 2011 Intel Corporation. All rights reserved.
  27  * All rights reserved.
  28  *
  29  * Redistribution and use in source and binary forms, with or without
  30  * modification, are permitted provided that the following conditions
  31  * are met:
  32  *
  33  *   * Redistributions of source code must retain the above copyright
  34  *     notice, this list of conditions and the following disclaimer.
  35  *   * Redistributions in binary form must reproduce the above copyright
  36  *     notice, this list of conditions and the following disclaimer in
  37  *     the documentation and/or other materials provided with the
  38  *     distribution.
  39  *   * Neither the name of Intel Corporation nor the names of its
  40  *     contributors may be used to endorse or promote products derived
  41  *     from this software without specific prior written permission.
  42  *
  43  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  44  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  45  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  46  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  47  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  48  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  49  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  50  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  51  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  52  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  53  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  54  */
  55
  56 #ifndef _ISCI_PORT_H_
  57 #define _ISCI_PORT_H_
  58
  59 #include <scsi/libsas.h>
  60 #include "isci.h"
  61 #include "scic_sds_port.h"
  62
  63 struct isci_phy;
  64 struct isci_host;
  65
  66 enum isci_status {
  67         isci_freed        = 0x00,
  68         isci_starting     = 0x01,
  69         isci_ready        = 0x02,
  70         isci_ready_for_io = 0x03,
  71         isci_stopping     = 0x04,
  72         isci_stopped      = 0x05,
  73 };
  74
  75 /**
  76  * struct isci_port - This class represents the port object used to internally
  77  *    represent libsas port objects. It also keeps a list of remote device
  78  *    objects.
  79  *
  80  *
  81  */
  82 struct isci_port {
  83         enum isci_status status;
  84         struct isci_host *isci_host;
  85         struct asd_sas_port sas_port;
  86         struct list_head remote_dev_list;
  87         spinlock_t state_lock;
  88         struct list_head domain_dev_list;
  89         struct completion start_complete;
  90         struct completion hard_reset_complete;
  91         enum sci_status hard_reset_status;
  92         struct scic_sds_port sci;
  93 };
  94
  95 static inline struct isci_port *sci_port_to_iport(struct scic_sds_port *sci_port)
  96 {
  97         struct isci_port *iport = container_of(sci_port, typeof(*iport), sci);
  98
  99         return iport;
 100 }
 101
 102 enum isci_status isci_port_get_state(
 103         struct isci_port *isci_port);
 104
 105 void isci_port_formed(
 106         struct asd_sas_phy *);
 107
 108 void isci_port_deformed(
 109         struct asd_sas_phy *);
 110
 111 void isci_port_bc_change_received(
 112         struct isci_host *isci_host,
 113         struct scic_sds_port *port,
 114         struct scic_sds_phy *phy);
 115
 116 void isci_port_link_up(
 117         struct isci_host *isci_host,
 118         struct scic_sds_port *port,
 119         struct scic_sds_phy *phy);
 120
 121 void isci_port_link_down(
 122         struct isci_host *isci_host,
 123         struct isci_phy *isci_phy,
 124         struct isci_port *port);
 125
 126 void isci_port_ready(
 127         struct isci_host *isci_host,
 128         struct isci_port *isci_port);
 129
 130 void isci_port_not_ready(
 131         struct isci_host *isci_host,
 132         struct isci_port *port);
 133
 134 void isci_port_init(
 135         struct isci_port *port,
 136         struct isci_host *host,
 137         int index);
 138
 139 void isci_port_hard_reset_complete(
 140         struct isci_port *isci_port,
 141         enum sci_status completion_status);
 142
 143 int isci_port_perform_hard_reset(struct isci_host *ihost, struct isci_port *iport,
 144                                  struct isci_phy *iphy);
 145
 146 void isci_port_stop_complete(
 147                 struct scic_sds_controller *scic,
 148                 struct scic_sds_port *sci_port,
 149                 enum sci_status completion_status);
 150
 151 #endif /* !defined(_ISCI_PORT_H_) */
 152