scsiata.h

/*
 * scsiata.h
 *
 * Home page of code is: http://smartmontools.sourceforge.net
 *
 * Copyright (C) 2006 Douglas Gilbert <dougg@torque.net>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2, or (at your option)
 * any later version.
 *
 * You should have received a copy of the GNU General Public License
 * (for example COPYING); if not, write to the Free
 * Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 *
 */


#ifndef SCSIATA_H_
#define SCSIATA_H_

#define SCSIATA_H_CVSID "$Id: scsiata.h,v 1.2 2006/07/01 21:29:31 dpgilbert Exp $\n"

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>

#include "atacmds.h"

#define SAT_ATA_PASSTHROUGH_12LEN 12
#define SAT_ATA_PASSTHROUGH_16LEN 16

extern int sat_command_interface(int device, smart_command_set command,
                                 int select, char *data);

/* Attempt an IDENTIFY DEVICE ATA command via SATL when packet_interface
   is 0 otherwise attempt IDENTIFY PACKET DEVICE. If successful
   return 1, else 0 */
extern int has_sat_pass_through(int device, int packet_interface);

/* This is a slightly stretched SCSI sense "descriptor" format header.
   The addition is to allow the 0x70 and 0x71 response codes. The idea
   is to place the salient data of both "fixed" and "descriptor" sense
   format into one structure to ease application processing.
   The original sense buffer should be kept around for those cases
   in which more information is required (e.g. the LBA of a MEDIUM ERROR). */
struct sg_scsi_sense_hdr {
    unsigned char response_code; /* permit: 0x0, 0x70, 0x71, 0x72, 0x73 */
    unsigned char sense_key;
    unsigned char asc;
    unsigned char ascq;
    unsigned char byte4;
    unsigned char byte5;
    unsigned char byte6;
    unsigned char additional_length;
};

/* Maps the salient data from a sense buffer which is in either fixed or
   descriptor format into a structure mimicking a descriptor format
   header (i.e. the first 8 bytes of sense descriptor format).
   If zero response code returns 0. Otherwise returns 1 and if 'sshp' is
   non-NULL then zero all fields and then set the appropriate fields in
   that structure. sshp::additional_length is always 0 for response
   codes 0x70 and 0x71 (fixed format). */
extern int sg_scsi_normalize_sense(const unsigned char * sensep,
                                   int sense_len,
                                   struct sg_scsi_sense_hdr * sshp);

/* Attempt to find the first SCSI sense data descriptor that matches the
   given 'desc_type'. If found return pointer to start of sense data
   descriptor; otherwise (including fixed format sense data) returns NULL. */
extern const unsigned char * sg_scsi_sense_desc_find(
                const unsigned char * sensep, int sense_len, int desc_type);

#endif