1 /* 2 * QLogic ISP2x00 SCSI-FCP 3 * 4 * Written by Erik H. Moe, ehm@cris.com 5 * Copyright 1995, Erik H. Moe 6 * 7 * This program is free software; you can redistribute it and/or modify it 8 * under the terms of the GNU General Public License as published by the 9 * Free Software Foundation; either version 2, or (at your option) any 10 * later version. 11 * 12 * This program is distributed in the hope that it will be useful, but 13 * WITHOUT ANY WARRANTY; without even the implied warranty of 14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 15 * General Public License for more details. 16 */ 17 18 /* Renamed and updated to 1.3.x by Michael Griffith <grif@cs.ucr.edu> */ 19 20 /* This is a version of the isp1020 driver which was modified by 21 * Chris Loveland <cwl@iol.unh.edu> to support the isp2x00 22 */ 23 24 25 /* 26 * $Date: 1995/09/22 02:32:56 $ 27 * $Revision: 0.5 $ 28 * 29 * $Log: isp1020.h,v $ 30 * Revision 0.5 1995/09/22 02:32:56 root 31 * do auto request sense 32 * 33 * Revision 0.4 1995/08/07 04:48:28 root 34 * supply firmware with driver. 35 * numerous bug fixes/general cleanup of code. 36 * 37 * Revision 0.3 1995/07/16 16:17:16 root 38 * added reset/abort code. 39 * 40 * Revision 0.2 1995/06/29 03:19:43 root 41 * fixed biosparam. 42 * added queue protocol. 43 * 44 * Revision 0.1 1995/06/25 01:56:13 root 45 * Initial release. 46 * 47 */ 48 49 #ifndef _QLOGICFC_H 50 #define _QLOGICFC_H 51 52 /* 53 * With the qlogic interface, every queue slot can hold a SCSI 54 * command with up to 2 scatter/gather entries. If we need more 55 * than 2 entries, continuation entries can be used that hold 56 * another 5 entries each. Unlike for other drivers, this means 57 * that the maximum number of scatter/gather entries we can 58 * support at any given time is a function of the number of queue 59 * slots available. That is, host->can_queue and host->sg_tablesize 60 * are dynamic and _not_ independent. This all works fine because 61 * requests are queued serially and the scatter/gather limit is 62 * determined for each queue request anew. 63 */ 64 65 #define DATASEGS_PER_COMMAND 2 66 #define DATASEGS_PER_CONT 5 67 68 #define QLOGICFC_REQ_QUEUE_LEN 127 /* must be power of two - 1 */ 69 #define QLOGICFC_MAX_SG(ql) (DATASEGS_PER_COMMAND + (((ql) > 0) ? DATASEGS_PER_CONT*((ql) - 1) : 0)) 70 #define QLOGICFC_CMD_PER_LUN 8 71 72 int isp2x00_detect(Scsi_Host_Template *); 73 int isp2x00_release(struct Scsi_Host *); 74 const char * isp2x00_info(struct Scsi_Host *); 75 int isp2x00_queuecommand(Scsi_Cmnd *, void (* done)(Scsi_Cmnd *)); 76 int isp2x00_abort(Scsi_Cmnd *); 77 int isp2x00_reset(Scsi_Cmnd *, unsigned int); 78 int isp2x00_biosparam(Disk *, kdev_t, int[]); 79 80 #ifndef NULL 81 #define NULL (0) 82 #endif 83 84 #define QLOGICFC { \ 85 detect: isp2x00_detect, \ 86 release: isp2x00_release, \ 87 info: isp2x00_info, \ 88 queuecommand: isp2x00_queuecommand, \ 89 eh_abort_handler: isp2x00_abort, \ 90 reset: isp2x00_reset, \ 91 bios_param: isp2x00_biosparam, \ 92 can_queue: QLOGICFC_REQ_QUEUE_LEN, \ 93 this_id: -1, \ 94 sg_tablesize: QLOGICFC_MAX_SG(QLOGICFC_REQ_QUEUE_LEN), \ 95 cmd_per_lun: QLOGICFC_CMD_PER_LUN, \ 96 present: 0, \ 97 unchecked_isa_dma: 0, \ 98 use_clustering: ENABLE_CLUSTERING, \ 99 highmem_io: 1 \ 100 } 101 102 #endif /* _QLOGICFC_H */ 103 104 105 106