FreeBSD/Linux Kernel Cross Reference
sys/dev/isci/scil/sati_read_buffer.c

     /*-
      * SPDX-License-Identifier: BSD-2-Clause OR GPL-2.0
      *
      * This file is provided under a dual BSD/GPLv2 license.  When using or
      * redistributing this file, you may do so under either license.
     *
     * GPL LICENSE SUMMARY
     *
     * Copyright(c) 2008 - 2011 Intel Corporation. All rights reserved.
    *
    * This program is free software; you can redistribute it and/or modify
    * it under the terms of version 2 of the GNU General Public License as
    * published by the Free Software Foundation.
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    * This program is distributed in the hope that it will be useful, but
    * WITHOUT ANY WARRANTY; without even the implied warranty of
    * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
    * General Public License for more details.
    *
    * You should have received a copy of the GNU General Public License
    * along with this program; if not, write to the Free Software
    * Foundation, Inc., 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
    * The full GNU General Public License is included in this distribution
    * in the file called LICENSE.GPL.
    *
    * BSD LICENSE
    *
    * Copyright(c) 2008 - 2011 Intel Corporation. All rights reserved.
    * All rights reserved.
    *
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    * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
    * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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     */
    
    #include <sys/cdefs.h>
    __FBSDID("$FreeBSD$");
    
    /**
    * @file
    * @brief This file contains the implementation to translate
    *        SCSI Read Buffer command based on the SAT spec.
    */
    
    #if !defined(DISABLE_SATI_READ_BUFFER)
    
    #include <dev/isci/scil/sati_read_buffer.h>
    #include <dev/isci/scil/sati_callbacks.h>
    #include <dev/isci/scil/sati_util.h>
    
    
    /**
    * @brief This method will translate the SCSI Read Buffer command
    *        into a corresponding ATA Read Buffer command.
    *        For more information on the parameters passed to this method,
    *        please reference sati_translate_command().
    *
    * @return Indicates if the command translation succeeded.
    * @retval SATI_SUCCESS indicates that the translation was supported and occurred
    *         without error.
    * @retval SATI_FAILURE_CHECK_RESPONSE_DATA This value is returned if
    *         there is a translation failure.
    * @retval SATI_COMPLETE indicates that the translation was supported, occurred without
    *         error, and no additional translation is necessary.
    */
    SATI_STATUS sati_read_buffer_translate_command(
       SATI_TRANSLATOR_SEQUENCE_T * sequence,
       void                       * scsi_io,
       void                       * ata_io
    )
    {
       U8 * cdb = sati_cb_get_cdb_address(scsi_io);
       SATI_STATUS status = SATI_FAILURE;
       U32 allocation_length;
       U32 buffer_offset;
    
       allocation_length = ((sati_get_cdb_byte(cdb, 6) << 16) |
                            (sati_get_cdb_byte(cdb, 7) << 8)  |
                            (sati_get_cdb_byte(cdb, 8)));
    
      buffer_offset = ((sati_get_cdb_byte(cdb, 3) << 16) |
                       (sati_get_cdb_byte(cdb, 4) << 8)  |
                       (sati_get_cdb_byte(cdb, 5)));
   
      sequence->allocation_length = allocation_length;
   
      switch(sati_get_cdb_byte(cdb, 1))
      {
         case SATI_READ_BUFFER_MODE_DATA:
            if((allocation_length == 512) && (buffer_offset == 0) &&
               (sati_get_cdb_byte(cdb, 2) == 0))
            {
               sati_ata_read_buffer_construct(ata_io, sequence);
               sequence->type = SATI_SEQUENCE_READ_BUFFER;
               sequence->state = SATI_SEQUENCE_STATE_AWAIT_RESPONSE;
               status = SATI_SUCCESS;
            }
            else
            {
               sati_scsi_sense_data_construct(
                  sequence,
                  scsi_io,
                  SCSI_STATUS_CHECK_CONDITION,
                  SCSI_SENSE_ILLEGAL_REQUEST,
                  SCSI_ASC_INVALID_FIELD_IN_CDB,
                  SCSI_ASCQ_INVALID_FIELD_IN_CDB
               );
               sequence->state = SATI_SEQUENCE_STATE_FINAL;
               status = SATI_FAILURE_CHECK_RESPONSE_DATA;
            }
         break;
   
         case SATI_READ_BUFFER_MODE_DESCRIPTOR:
   
            //allocation legnth must be at least four to return translated data
            if(allocation_length < 4)
            {
               sati_scsi_sense_data_construct(
                  sequence,
                  scsi_io,
                  SCSI_STATUS_CHECK_CONDITION,
                  SCSI_SENSE_ILLEGAL_REQUEST,
                  SCSI_ASC_INVALID_FIELD_IN_CDB,
                  SCSI_ASCQ_INVALID_FIELD_IN_CDB
               );
               sequence->state = SATI_SEQUENCE_STATE_FINAL;
               status = SATI_FAILURE_CHECK_RESPONSE_DATA;
            }
            else
            {
               //figure out if we support other buffer id's
               sati_set_data_byte(sequence, scsi_io, 0, 0x09); //offset boundary
               sati_set_data_byte(sequence, scsi_io, 1, 0x00);
               sati_set_data_byte(sequence, scsi_io, 2, 0x02); //buffer capacity 0x200
               sati_set_data_byte(sequence, scsi_io, 3, 0x00);
               sequence->state = SATI_SEQUENCE_STATE_FINAL;
               status = SATI_COMPLETE;
            }
         break;
   
         default:
            //Unspecified sat2v7, returning invalid cdb
            sati_scsi_sense_data_construct(
               sequence,
               scsi_io,
               SCSI_STATUS_CHECK_CONDITION,
               SCSI_SENSE_ILLEGAL_REQUEST,
               SCSI_ASC_INVALID_FIELD_IN_CDB,
               SCSI_ASCQ_INVALID_FIELD_IN_CDB
            );
            sequence->state = SATI_SEQUENCE_STATE_FINAL;
            status = SATI_FAILURE_CHECK_RESPONSE_DATA;
      }
      return status;
   }
   
   /**
   * @brief This method will complete the Read Buffer Translation by copying the
            ATA response data into the SCSI request DATA buffer.
   *        For more information on the parameters passed to this method,
   *        please reference sati_translate_command().
   *
   * @return Indicates if the command translation succeeded.
   * @retval SATI_FAILURE_CHECK_RESPONSE_DATA This value is returned if
   *         there is a translation failure.
   * @retval SATI_COMPLETE indicates that the translation was supported, occurred without
   *         error, and no additional translation is necessary.
   */
   SATI_STATUS sati_read_buffer_translate_response(
      SATI_TRANSLATOR_SEQUENCE_T * sequence,
      void                       * scsi_io,
      void                       * ata_io
   )
   {
      U8 * register_fis = sati_cb_get_d2h_register_fis_address(ata_io);
      U8   ata_status = (U8) sati_get_ata_status(register_fis);
      SATI_STATUS status = SATI_COMPLETE;
   
      if (ata_status & ATA_STATUS_REG_ERROR_BIT)
      {
         sati_scsi_sense_data_construct(
            sequence,
            scsi_io,
            SCSI_STATUS_CHECK_CONDITION,
            SCSI_SENSE_ABORTED_COMMAND,
            SCSI_ASC_NO_ADDITIONAL_SENSE,
            SCSI_ASCQ_NO_ADDITIONAL_SENSE
         );
   
         status = SATI_FAILURE_CHECK_RESPONSE_DATA;
      }
      else
      {
         void * ata_data = sati_cb_get_ata_data_address(ata_io);
   
         if(ata_data == NULL)
         {
            status = SATI_FAILURE;
         }
         else
         {
            //copy ATA data into SCSI data buffer
            sati_copy_data(
               sequence,
               scsi_io,
               0,
               ata_data,
               512
            );
         }
      }
   
      sequence->state = SATI_SEQUENCE_STATE_FINAL;
      return status;
   }
   
   
   #endif //!defined(DISABLE_SATI_READ_BUFFER)

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