114 lines
2.7 KiB
C
114 lines
2.7 KiB
C
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/* @(#)read.c 1.159 10/05/24 Copyright 1995-2010 J. Schilling */
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#include <schily/mconfig.h>
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#ifndef lint
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static UConst char sccsid[] =
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"@(#)read.c 1.159 10/05/24 Copyright 1995-2010 J. Schilling";
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#endif
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/*
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* SCSI command functions for the read call
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*
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* Copyright (c) 1995-2010 J. Schilling
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*/
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/*
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* The contents of this file are subject to the terms of the
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* Common Development and Distribution License, Version 1.0 only
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* (the "License"). You may not use this file except in compliance
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* with the License.
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*
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* See the file CDDL.Schily.txt in this distribution for details.
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*
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* When distributing Covered Code, include this CDDL HEADER in each
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* file and include the License file CDDL.Schily.txt from this distribution.
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*/
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#include <schily/stdio.h>
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#include <schily/standard.h>
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#include <schily/utypes.h>
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#include <schily/btorder.h>
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#include <schily/intcvt.h>
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#include <schily/schily.h>
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#include <scg/scgcmd.h>
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#include <scg/scsidefs.h>
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#include <scg/scsireg.h>
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#include <scg/scsitransp.h>
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#include "libscgcmd.h"
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EXPORT int read_scsi __PR((SCSI *scgp, caddr_t, long, int));
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EXPORT int read_g0 __PR((SCSI *scgp, caddr_t, long, int));
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EXPORT int read_g1 __PR((SCSI *scgp, caddr_t, long, int));
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#define G0_MAXADDR 0x1FFFFFL
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EXPORT int
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read_scsi(scgp, bp, addr, cnt)
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SCSI *scgp;
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caddr_t bp;
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long addr;
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int cnt;
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{
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if (addr <= G0_MAXADDR && cnt < 256 && !__is_atapi())
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return (read_g0(scgp, bp, addr, cnt));
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else
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return (read_g1(scgp, bp, addr, cnt));
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}
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EXPORT int
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read_g0(scgp, bp, addr, cnt)
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SCSI *scgp;
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caddr_t bp;
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long addr;
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int cnt;
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{
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register struct scg_cmd *scmd = scgp->scmd;
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if (scgp->cap->c_bsize <= 0)
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raisecond("capacity_not_set", 0L);
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fillbytes((caddr_t)scmd, sizeof (*scmd), '\0');
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scmd->addr = bp;
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scmd->size = cnt*scgp->cap->c_bsize;
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scmd->flags = SCG_RECV_DATA|SCG_DISRE_ENA;
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scmd->cdb_len = SC_G0_CDBLEN;
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scmd->sense_len = CCS_SENSE_LEN;
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scmd->cdb.g0_cdb.cmd = SC_READ;
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scmd->cdb.g0_cdb.lun = scg_lun(scgp);
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g0_cdbaddr(&scmd->cdb.g0_cdb, addr);
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scmd->cdb.g0_cdb.count = cnt;
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/* scmd->cdb.g0_cdb.vu_56 = 1;*/
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scgp->cmdname = "read_g0";
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return (scg_cmd(scgp));
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}
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EXPORT int
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read_g1(scgp, bp, addr, cnt)
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SCSI *scgp;
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caddr_t bp;
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long addr;
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int cnt;
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{
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register struct scg_cmd *scmd = scgp->scmd;
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if (scgp->cap->c_bsize <= 0)
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raisecond("capacity_not_set", 0L);
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fillbytes((caddr_t)scmd, sizeof (*scmd), '\0');
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scmd->addr = bp;
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scmd->size = cnt*scgp->cap->c_bsize;
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scmd->flags = SCG_RECV_DATA|SCG_DISRE_ENA;
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scmd->cdb_len = SC_G1_CDBLEN;
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scmd->sense_len = CCS_SENSE_LEN;
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scmd->cdb.g1_cdb.cmd = SC_EREAD;
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scmd->cdb.g1_cdb.lun = scg_lun(scgp);
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g1_cdbaddr(&scmd->cdb.g1_cdb, addr);
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g1_cdblen(&scmd->cdb.g1_cdb, cnt);
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scgp->cmdname = "read_g1";
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return (scg_cmd(scgp));
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}
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