text: /*
   * QLogic ISP2x00 SCSI-FCP
   * 
   * Written by Erik H. Moe, ehm@cris.com
   * Copyright 1995, Erik H. Moe
   *
   * 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.
   *
   * 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.
   */
  
  /* Renamed and updated to 1.3.x by Michael Griffith <grif@cs.ucr.edu> */
  
  /* This is a version of the isp1020 driver which was modified by
   * Chris Loveland <cwl@iol.unh.edu> to support the isp2x00
   */
  
  
  /*
   * $Date: 1995/09/22 02:32:56 $
   * $Revision: 0.5 $
   *
   * $Log: isp1020.h,v $
   * Revision 0.5  1995/09/22  02:32:56  root
   * do auto request sense
   *
   * Revision 0.4  1995/08/07  04:48:28  root
   * supply firmware with driver.
   * numerous bug fixes/general cleanup of code.
   *
   * Revision 0.3  1995/07/16  16:17:16  root
   * added reset/abort code.
   *
   * Revision 0.2  1995/06/29  03:19:43  root
   * fixed biosparam.
   * added queue protocol.
   *
   * Revision 0.1  1995/06/25  01:56:13  root
   * Initial release.
   *
   */
  
  #ifndef _QLOGICFC_H
  #define _QLOGICFC_H
  
  /*
   * With the qlogic interface, every queue slot can hold a SCSI
   * command with up to 2 scatter/gather entries.  If we need more
   * than 2 entries, continuation entries can be used that hold
   * another 5 entries each.  Unlike for other drivers, this means
   * that the maximum number of scatter/gather entries we can
   * support at any given time is a function of the number of queue
   * slots available.  That is, host->can_queue and host->sg_tablesize
   * are dynamic and _not_ independent.  This all works fine because
   * requests are queued serially and the scatter/gather limit is
   * determined for each queue request anew.
   */
  
  #define DATASEGS_PER_COMMAND 2
  #define DATASEGS_PER_CONT 5
  
  #define QLOGICFC_REQ_QUEUE_LEN 255     /* must be power of two - 1 */
  #define QLOGICFC_MAX_SG(ql)	(DATASEGS_PER_COMMAND + (((ql) > 0) ? DATASEGS_PER_CONT*((ql) - 1) : 0))
  #define QLOGICFC_CMD_PER_LUN    8
  
  int isp2x00_detect(Scsi_Host_Template *);
  int isp2x00_release(struct Scsi_Host *);
  const char * isp2x00_info(struct Scsi_Host *);
  int isp2x00_queuecommand(Scsi_Cmnd *, void (* done)(Scsi_Cmnd *));
  int isp2x00_abort(Scsi_Cmnd *);
  int isp2x00_reset(Scsi_Cmnd *, unsigned int);
  int isp2x00_biosparam(struct scsi_device *, struct block_device *,
  		sector_t, int[]);
  #endif /* _QLOGICFC_H */
  