ATA_SCSI_TRANSLATE(9)					  libata SCSI translation/emulat				     ATA_SCSI_TRANSLATE(9)

NAME

       ata_scsi_translate - Translate then issue SCSI command to ATA device

SYNOPSIS

       int ata_scsi_translate(struct ata_device * dev, struct scsi_cmnd * cmd, void (*done) (struct scsi_cmnd *), ata_xlat_func_t xlat_func);

ARGUMENTS

       dev
	   ATA device to which the command is addressed

       cmd
	   SCSI command to execute

       done
	   SCSI command completion function

       xlat_func
	   Actor which translates cmd to an ATA taskfile

DESCRIPTION

       Our ->queuecommand function has decided that the SCSI command issued can be directly translated into an ATA command, rather than handled
       internally.

       This function sets up an ata_queued_cmd structure for the SCSI command, and sends that ata_queued_cmd to the hardware.

       The xlat_func argument (actor) returns 0 if ready to execute ATA command, else 1 to finish translation. If 1 is returned then cmd->result
       (and possibly cmd->sense_buffer) are assumed to be set reflecting an error condition or clean (early) termination.

LOCKING

       spin_lock_irqsave(host lock)

RETURNS

       0 on success, SCSI_ML_QUEUE_DEVICE_BUSY if the command needs to be deferred.

AUTHOR

       Jeff Garzik
	   Author.

COPYRIGHT

Kernel Hackers Manual 2.6.					     July 2010						     ATA_SCSI_TRANSLATE(9)