xref: /freebsd-10.0-release/sys/dev/isci/scil/sati_atapi.h

/*-
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 * Copyright(c) 2008 - 2011 Intel Corporation. All rights reserved.
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 * Copyright(c) 2008 - 2011 Intel Corporation. All rights reserved.
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#ifndef _SATI_ATAPI_H_
#define _SATI_ATAPI_H_

/**
 * @file
 * @brief This file contains all of the interface methods, macros, structures
 *        that can be utilized by a user to perform SCSI-to-ATA PACKET IO
 *        Translation.
 */
#include <dev/isci/scil/sati_types.h>
#include <dev/isci/scil/sati_translator_sequence.h>

/**
 * @brief This method translates the supplied SCSI command into a
 *        corresponding ATA packet protocol command.
 *
 * @param[in]  sequence This parameter specifies the sequence
 *             data associated with the translation.
 * @param[in]  sati_device This parameter specifies the remote device
 *             for which the translated request is destined.
 * @param[in,out] scsi_io This parameter specifies the user's SCSI IO request
 *                object.  SATI expects that the user can access the SCSI CDB,
 *                response, and data from this pointer.  For example, if there
 *                is a failure in translation resulting in sense data, then
 *                SATI will call sati_cb_set_status() and pass the scsi_io
 *                pointer as a parameter.
 * @param[out] atapi_io This parameter specifies the location of the
 *             ATA Packet FIS into which the translator can write the resultant
 *             ATA command if translation is successful.  This parameter is
 *             passed back to the user through the SATI_SATA_CALLBACKS when it
 *             is necessary to write fields in the ata_io.
 *
 * @return Indicate if the translation was successful.
 * @retval SATI_SUCCESS
 * @retval SATI_FAILURE_CHECK_RESPONSE_DATA
 */
SATI_STATUS sati_atapi_translate_command(
   SATI_TRANSLATOR_SEQUENCE_T * sequence,
   SATI_DEVICE_T              * sati_device,
   void                       * scsi_io,
   void                       * atapi_io
);


/**
 * @brief This method translates the supplied ATA packet IO response into the
 *        corresponding SCSI command response.
 *
 * @param[out]  sequence This parameter specifies the sequence
 *             data associated with the translation and will be updated
 *             according to the command response.
 * @param[out] scsi_io This parameter specifies the user's SCSI IO request
 *             object.  SATI expects that the user can access the SCSI CDB,
 *             response, and data from this pointer.  For example, if there
 *             is a failure in translation resulting in sense data, then
 *             SATI will call sati_cb_set_status() and pass the scsi_io
 *             pointer as a parameter.
 * @param[in] atapi_io This parameter specifies the location of the
 *             ATAPI IO request (e.g. register FIS, PIO Setup etc.) from which
 *             the translator can read the received ATA status and error
 *             fields.
 *
 * @return Indicate if the translation was successful.
 * @retval SATI_SUCCESS
 * @retval SATI_FAILURE_CHECK_RESPONSE_DATA
 */
SATI_STATUS sati_atapi_translate_command_response(
   SATI_TRANSLATOR_SEQUENCE_T * sequence,
   void                       * scsi_io,
   void                       * atapi_io
);


/**
 * @brief This method translates the internal Request Sense command response
 *        and set the sense data for the previous failed SCSI command.
 *
 * @param[out] sequence This parameter specifies the sequence
 *             data associated with the translation and to be updated to
 *             final state.
 * @param[out] scsi_io This parameter specifies the user's SCSI IO request
 *             object.  SATI expects that the user can access the SCSI CDB,
 *             response, and data from this pointer.  For example, if there
 *             is a failure in translation resulting in sense data, then
 *             SATI will call sati_cb_set_status() and pass the scsi_io
 *             pointer as a parameter.
 * @param[in] atapi_io This parameter specifies the location of the
 *             ATAPI IO request (e.g. register FIS, PIO Setup etc.) from which
 *             the translator can read the received ATA status and error
 *             fields.
 *
 * @return None.
 */
void sati_atapi_translate_request_sense_response(
   SATI_TRANSLATOR_SEQUENCE_T * sequence,
   void                       * scsi_io,
   void                       * atapi_io
);


/**
 * @brief This method retrieve ATA packet IO actual transferred data length.
 *
 * @param[in]  sequence This parameter specifies the sequence
 *             data associated with the translation.
 * @param[out] scsi_io This parameter specifies the user's SCSI IO request
 *             object.  SATI expects that the user can access the SCSI CDB,
 *             response, and data from this pointer.  For example, if there
 *             is a failure in translation resulting in sense data, then
 *             SATI will call sati_cb_set_status() and pass the scsi_io
 *             pointer as a parameter.
 * @param[out] atapi_io This parameter specifies the location of the
 *             ATAPI IO request (e.g. register FIS, PIO Setup etc.) from which
 *             the translator can read the received ATA status and error
 *             fields.
 *
 * @return Actual data transfer length.
 */
U32 sati_atapi_translate_number_of_bytes_transferred(
   SATI_TRANSLATOR_SEQUENCE_T * sequence,
   void                       * scsi_io,
   void                       * atapi_io
);
#endif