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/* $OpenBSD: dev_tape.c,v 1.3 2001/07/04 08:33:56 niklas Exp $ */
/* $NetBSD: dev_tape.c,v 1.2 1995/10/17 22:58:20 gwr Exp $ */
/*
* Copyright (c) 1993 Paul Kranenburg
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by Paul Kranenburg.
* 4. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
/*
* This module implements a "raw device" interface suitable for
* use by the stand-alone I/O library UFS file-system code, and
* possibly for direct access (i.e. boot from tape).
*
* The implementation is deceptively simple because it uses the
* drivers provided by the Sun PROM monitor. Note that only the
* PROM driver used to load the boot program is available here.
*/
#include <sys/types.h>
#include <machine/mon.h>
#include <machine/saio.h>
#include "stand.h"
#include "dvma.h"
#include "promdev.h"
/* #include "dev_tape.h" XXX - needs stdarg.h */
extern int debug;
struct saioreq tape_ioreq;
/*
* This is a special version of devopen() for tape boot.
* In this version, the file name is a numeric string of
* one digit, which is passed to the device open so it
* can open the appropriate tape segment.
*/
int
devopen(f, fname, file)
struct open_file *f;
const char *fname; /* normally "1" */
char **file;
{
struct devsw *dp;
int error;
*file = (char*)fname;
dp = &devsw[0];
f->f_dev = dp;
/* The following will call tape_open() */
return (dp->dv_open(f, fname));
}
int
tape_open(f, fname)
struct open_file *f;
char *fname; /* partition number, i.e. "1" */
{
struct bootparam *bp;
struct saioreq *si;
int error, part;
#ifdef DEBUG
printf("tape_open: part=%s\n", fname);
#endif
/*
* Set the tape segment number to the one indicated
* by the single digit fname passed in above.
*/
if ((fname[0] < '0') && (fname[0] > '9')) {
return ENOENT;
}
part = fname[0] - '0';
/*
* Setup our part of the saioreq.
* (determines what gets opened)
*/
si = &tape_ioreq;
bzero((caddr_t)si, sizeof(*si));
bp = *romp->bootParam;
si->si_boottab = bp->bootDevice;
si->si_ctlr = bp->ctlrNum;
si->si_unit = bp->unitNum;
si->si_boff = part; /* default = bp->partNum + 1; */
error = prom_iopen(si);
#ifdef DEBUG
printf("tape_open: prom_iopen returned 0x%x\n", error);
#endif
if (!error)
f->f_devdata = si;
return (error);
}
int
tape_close(f)
struct open_file *f;
{
struct saioreq *si;
#ifdef DEBUG
printf("tape_close: calling prom_iclose\n");
#endif
si = f->f_devdata;
prom_iclose(si);
f->f_devdata = NULL;
return 0;
}
int
tape_strategy(devdata, flag, dblk, size, buf, rsize)
void *devdata;
int flag;
daddr_t dblk;
u_int size;
char *buf;
u_int *rsize;
{
struct saioreq *si;
struct boottab *ops;
char *dmabuf;
int si_flag, xcnt;
si = devdata;
ops = si->si_boottab;
#ifdef DEBUG
if (debug > 1)
printf("tape_strategy: size=%d dblk=%d\n", size, dblk);
#endif
dmabuf = dvma_mapin(buf, size);
si->si_bn = dblk;
si->si_ma = dmabuf;
si->si_cc = size;
si_flag = (flag == F_READ) ? SAIO_F_READ : SAIO_F_WRITE;
xcnt = (*ops->b_strategy)(si, si_flag);
dvma_mapout(dmabuf, size);
#ifdef DEBUG
if (debug > 1)
printf("tape_strategy: xcnt = %x\n", xcnt);
#endif
/* At end of tape, xcnt == 0 (not an error) */
if (xcnt < 0)
return (EIO);
*rsize = xcnt;
return (0);
}
int
tape_ioctl()
{
return EIO;
}
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