qlogicfc.h
上传用户:lgb322
上传日期:2013-02-24
资源大小:30529k
文件大小:4k
- /*
- * 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 127 /* 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(Disk *, kdev_t, int[]);
- #ifndef NULL
- #define NULL (0)
- #endif
- #define QLOGICFC {
- detect: isp2x00_detect,
- release: isp2x00_release,
- info: isp2x00_info,
- queuecommand: isp2x00_queuecommand,
- eh_abort_handler: isp2x00_abort,
- reset: isp2x00_reset,
- bios_param: isp2x00_biosparam,
- can_queue: QLOGICFC_REQ_QUEUE_LEN,
- this_id: -1,
- sg_tablesize: QLOGICFC_MAX_SG(QLOGICFC_REQ_QUEUE_LEN),
- cmd_per_lun: QLOGICFC_CMD_PER_LUN,
- present: 0,
- unchecked_isa_dma: 0,
- use_clustering: ENABLE_CLUSTERING
- }
- #endif /* _QLOGICFC_H */