isci/scil/sati.h

/*-
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 * $FreeBSD: stable/11/sys/dev/isci/scil/sati.h 331722 2018-03-29 02:50:57Z eadler $
 */
#ifndef _SATI_H_
#define _SATI_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 Translation.
 *        SATI adheres to the www.t10.org SAT specification.
 *
 * For specific compliance information please refer to:
 * - sati_get_sat_compliance_version() and
 * - sati_get_sat_compliance_version_revision()
 *
 * For situations where compliance is not observed, the SATI will
 * return an error indication (most likely INVALID FIELD IN CDB sense).
 */

#include <dev/isci/scil/sati_types.h>
#include <dev/isci/scil/sati_translator_sequence.h>

/**
 * @brief This method will be called by the core to indicate the start of a
 *        new translation sequence.  Set up the initial sequence state.
 *
 * @return None
 */
void sati_sequence_construct(
   SATI_TRANSLATOR_SEQUENCE_T * sequence
);

/**
 * @brief This method will be called by the core to request the current translation
 *        sequence be terminated.
 *
 * @param[in]  sequence This parameter specifies the sequence
 *             data associated with the translation.
 * @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] ata_io This parameter specifies the location of the
 *             ATA register 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 None
 */
void sati_sequence_terminate(
   SATI_TRANSLATOR_SEQUENCE_T * sequence,
   void                       * scsi_io,
   void                       * ata_io
);

/**
 * @brief This method translates the supplied SCSI command into a
 *        corresponding ATA 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] ata_io This parameter specifies the location of the
 *             ATA register 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_translate_command(
   SATI_TRANSLATOR_SEQUENCE_T * sequence,
   SATI_DEVICE_T              * sati_device,
   void                       * scsi_io,
   void                       * ata_io
);

/**
 * @brief This method translates the supplied SCSI task management request
 *        into a corresponding ATA command/control FIS.
 *
 * @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] ata_io This parameter specifies the location of the
 *             ATA register 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_translate_task_management(
   SATI_TRANSLATOR_SEQUENCE_T * sequence,
   SATI_DEVICE_T              * sati_device,
   void                       * scsi_task,
   void                       * ata_io
);

/**
 * @brief This method translates the supplied ATA response into the
 *        corresponding SCSI command response.
 *
 * @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] ata_io This parameter specifies the location of the
 *             ATA 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_translate_command_response(
   SATI_TRANSLATOR_SEQUENCE_T * sequence,
   void                       * scsi_io,
   void                       * ata_io
);

/**
 * @brief This method translates the supplied ATA response into the
 *        corresponding SCSI task response.
 *
 * @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] ata_io This parameter specifies the location of the
 *             ATA 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_FAILURE_CHECK_RESPONSE_DATA
 */
SATI_STATUS sati_translate_task_response(
   SATI_TRANSLATOR_SEQUENCE_T * sequence,
   void                       * scsi_io,
   void                       * ata_io
);

/**
 * @brief This method simply returns the SAT major compliance version number
 *        for which the implementation is compliant.
 *
 * @return Return the specification identifier with which this translator
 *         is compliant.
 */
U32 sati_get_sat_compliance_version(
   void
);

/**
 * @brief This method simply returns the SAT version revision identifier
 *        for which the implementation is compliant.
 *
 * @return Return the specification revision identifier with which this
 *         translator is compliant.
 */
U32 sati_get_sat_compliance_version_revision(
   void
);

/**
* @brief This method returns the number of data bytes written
*        by the translation sequence.
*
* @param[in] sequence This parameter specifies the sequence data
*            associated with the translation.
*
* @return Return the U16 number_data_bytes_set in the
*         SATI_TRANSLATOR_SEQUENCE.
*/
U16 sati_get_number_data_bytes_set(
   SATI_TRANSLATOR_SEQUENCE_T * sequence
);

void sati_translate_error(
   SATI_TRANSLATOR_SEQUENCE_T * sequence,
   void                       * scsi_io,
   U8                           error
);

#endif // _SATI_H_