drivers/scsi/isci/task.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 #ifndef _ISCI_TASK_H_
  56 #define _ISCI_TASK_H_
  57
  58 #include <scsi/sas_ata.h>
  59 #include "host.h"
  60
  61 #define ISCI_TERMINATION_TIMEOUT_MSEC 500
  62
  63 struct isci_request;
  64
  65 /**
  66  * enum isci_tmf_function_codes - This enum defines the possible preparations
  67  *    of task management requests.
  68  *
  69  *
  70  */
  71 enum isci_tmf_function_codes {
  72
  73         isci_tmf_func_none      = 0,
  74         isci_tmf_ssp_task_abort = TMF_ABORT_TASK,
  75         isci_tmf_ssp_lun_reset  = TMF_LU_RESET,
  76 };
  77
  78 /**
  79  * struct isci_tmf - This class represents the task management object which
  80  *    acts as an interface to libsas for processing task management requests
  81  *
  82  *
  83  */
  84 struct isci_tmf {
  85
  86         struct completion *complete;
  87         enum sas_protocol proto;
  88         union {
  89                 struct ssp_response_iu resp_iu;
  90                 struct dev_to_host_fis d2h_fis;
  91                 u8 rsp_buf[SSP_RESP_IU_MAX_SIZE];
  92         } resp;
  93         unsigned char lun[8];
  94         u16 io_tag;
  95         enum isci_tmf_function_codes tmf_code;
  96         int status;
  97 };
  98
  99 static inline void isci_print_tmf(struct isci_host *ihost, struct isci_tmf *tmf)
 100 {
 101         if (SAS_PROTOCOL_SATA == tmf->proto)
 102                 dev_dbg(&ihost->pdev->dev,
 103                         "%s: status = %x\n"
 104                         "tmf->resp.d2h_fis.status = %x\n"
 105                         "tmf->resp.d2h_fis.error = %x\n",
 106                         __func__,
 107                         tmf->status,
 108                         tmf->resp.d2h_fis.status,
 109                         tmf->resp.d2h_fis.error);
 110         else
 111                 dev_dbg(&ihost->pdev->dev,
 112                         "%s: status = %x\n"
 113                         "tmf->resp.resp_iu.data_present = %x\n"
 114                         "tmf->resp.resp_iu.status = %x\n"
 115                         "tmf->resp.resp_iu.data_length = %x\n"
 116                         "tmf->resp.resp_iu.data[0] = %x\n"
 117                         "tmf->resp.resp_iu.data[1] = %x\n"
 118                         "tmf->resp.resp_iu.data[2] = %x\n"
 119                         "tmf->resp.resp_iu.data[3] = %x\n",
 120                         __func__,
 121                         tmf->status,
 122                         tmf->resp.resp_iu.datapres,
 123                         tmf->resp.resp_iu.status,
 124                         be32_to_cpu(tmf->resp.resp_iu.response_data_len),
 125                         tmf->resp.resp_iu.resp_data[0],
 126                         tmf->resp.resp_iu.resp_data[1],
 127                         tmf->resp.resp_iu.resp_data[2],
 128                         tmf->resp.resp_iu.resp_data[3]);
 129 }
 130
 131
 132 int isci_task_execute_task(
 133         struct sas_task *task,
 134         int num,
 135         gfp_t gfp_flags);
 136
 137 int isci_task_abort_task(
 138         struct sas_task *task);
 139
 140 int isci_task_abort_task_set(
 141         struct domain_device *d_device,
 142         u8 *lun);
 143
 144 int isci_task_clear_aca(
 145         struct domain_device *d_device,
 146         u8 *lun);
 147
 148 int isci_task_clear_task_set(
 149         struct domain_device *d_device,
 150         u8 *lun);
 151
 152 int isci_task_query_task(
 153         struct sas_task *task);
 154
 155 int isci_task_lu_reset(
 156         struct domain_device *d_device,
 157         u8 *lun);
 158
 159 int isci_task_clear_nexus_port(
 160         struct asd_sas_port *port);
 161
 162 int isci_task_clear_nexus_ha(
 163         struct sas_ha_struct *ha);
 164
 165 int isci_task_I_T_nexus_reset(
 166         struct domain_device *d_device);
 167
 168 void isci_task_request_complete(
 169         struct isci_host *isci_host,
 170         struct isci_request *request,
 171         enum sci_task_status completion_status);
 172
 173 u16 isci_task_ssp_request_get_io_tag_to_manage(
 174         struct isci_request *request);
 175
 176 u8 isci_task_ssp_request_get_function(
 177         struct isci_request *request);
 178
 179
 180 void *isci_task_ssp_request_get_response_data_address(
 181         struct isci_request *request);
 182
 183 u32 isci_task_ssp_request_get_response_data_length(
 184         struct isci_request *request);
 185
 186 int isci_queuecommand(
 187         struct scsi_cmnd *scsi_cmd,
 188         void (*donefunc)(struct scsi_cmnd *));
 189
 190 #endif /* !defined(_SCI_TASK_H_) */