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freebsd-nq/sys/i386/isa/ft.c
Joerg Wunsch 85827d9c13 Restructured the floppy tape probe. 
The ``flags 1'' in the fdc line is now only needed for owners of an
Insight tape (perhaps there aren't any?  Mine is disfunctional).  All
other probes are safe wrt. to the motor-control line of floppy disk
drives.  Document the flag in LINT finally.
1995-05-06 19:34:28 +00:00

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/*
* Copyright (c) 1993, 1994 Steve Gerakines
*
* This is freely redistributable software. You may do anything you
* wish with it, so long as the above notice stays intact.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR(S) ``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(S) 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.
*
* ft.c - QIC-40/80 floppy tape driver
* $Id: ft.c,v 1.20 1995/04/12 20:47:43 wollman Exp $
*
* 01/19/95 ++sg
* Cleaned up recalibrate/seek code at attach time for FreeBSD 2.x.
*
* 06/07/94 v0.9 ++sg
* Tape stuck on segment problem should be gone. Re-wrote buffering
* scheme. Added support for drives that do not automatically perform
* seek load point. Can handle more wakeup types now and should correctly
* report most manufacturer names. Fixed places where unit 0 was being
* sent to the fdc instead of the actual unit number. Added ioctl support
* for an in-core badmap.
*
* 01/26/94 v0.3b - Jim Babb
* Got rid of the hard coded device selection. Moved (some of) the
* static variables into a structure for support of multiple devices.
* ( still has a way to go for 2 controllers - but closer )
* Changed the interface with fd.c so we no longer 'steal' it's
* driver routine vectors.
*
* 10/30/93 v0.3
* Fixed a couple more bugs. Reading was sometimes looping when an
* an error such as address-mark-missing was encountered. Both
* reading and writing was having more backup-and-retries than was
* necessary. Added support to get hardware info. Updated for use
* with FreeBSD.
*
* 09/15/93 v0.2 pl01
* Fixed a bunch of bugs: extra isa_dmadone() in async_write() (shouldn't
* matter), fixed double buffering in async_req(), changed tape_end() in
* set_fdcmode() to reduce unexpected interrupts, changed end of track
* processing in async_req(), protected more of ftreq_rw() with an
* splbio(). Changed some of the ftreq_*() functions so that they wait
* for inactivity and then go, instead of aborting immediately.
*
* 08/07/93 v0.2 release
* Shifted from ftstrat to ioctl support for I/O. Streaming is now much
* more reliable. Added internal support for error correction, QIC-40,
* and variable length tapes. Random access of segments greatly
* improved. Formatting and verification support is close but still
* incomplete.
*
* 06/03/93 v0.1 Alpha release
* Hopefully the last re-write. Many bugs fixed, many remain.
*/
#include "ft.h"
#if NFT > 0
#include "fd.h"
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/conf.h>
#include <sys/disklabel.h> /* temp. for dkunit() in fdc.h */
#include <sys/file.h>
#include <sys/proc.h>
#include <sys/ioctl.h>
#include <sys/malloc.h>
#include <sys/buf.h>
#include <sys/uio.h>
#include <sys/ftape.h>
#include <sys/devconf.h>
#include <machine/clock.h>
#include <i386/isa/isa_device.h>
#include <i386/isa/fdreg.h>
#include <i386/isa/fdc.h>
#include <i386/isa/icu.h>
#include <i386/isa/rtc.h>
#include <i386/isa/ftreg.h>
/* Enable or disable debugging messages. */
#define FTDBGALL 0 /* 1 if you want everything */
/*#define DPRT(a) printf a */
#define DPRT(a)
/* Constants private to the driver */
#define FTPRI (PRIBIO) /* sleep priority */
#define FTNBUFF 9 /* 8 for buffering, 1 for header */
/* The following items are needed from the fd driver. */
extern int in_fdc(int); /* read fdc registers */
extern int out_fdc(int, int); /* write fdc registers */
extern int hz; /* system clock rate */
/* Flags in isadev struct */
#define FT_PROBE 0x1 /* allow for "dangerous" tape probes */
/* Type of tape attached */
/* use numbers that don't interfere with the possible floppy types */
#define NO_TYPE 0 /* (same as NO_TYPE in fd.c) */
/* F_TAPE_TYPE must match value in fd.c */
#define F_TAPE_TYPE 0x020 /* bit for ft->types to indicate tape */
#define FT_NONE (F_TAPE_TYPE | 0) /* no method required */
#define FT_MOUNTAIN (F_TAPE_TYPE | 1) /* mountain */
#define FT_COLORADO (F_TAPE_TYPE | 2) /* colorado */
#define FT_INSIGHT (F_TAPE_TYPE | 3) /* insight */
/* Mode FDC is currently in: tape or disk */
enum { FDC_TAPE_MODE, FDC_DISK_MODE };
/* Command we are awaiting completion of */
enum { FTCMD_NONE, FTCMD_RESET, FTCMD_RECAL, FTCMD_SEEK, FTCMD_READID };
/* Tape interrupt status of current request */
enum { FTSTS_NONE, FTSTS_SNOOZE, FTSTS_INTERRUPT, FTSTS_TIMEOUT };
/* Tape I/O status */
enum {
FTIO_READY, /* No I/O activity */
FTIO_READING, /* Currently reading blocks */
FTIO_RDAHEAD, /* Currently reading ahead */
FTIO_WRITING /* Buffers are being written */
};
/* Current tape mode */
enum {
FTM_PRIMARY, /* Primary mode */
FTM_VERIFY, /* Verify mode */
FTM_FORMAT, /* Format mode */
FTM_DIAG1, /* Diagnostic mode 1 */
FTM_DIAG2 /* Diagnostic mode 2 */
};
/* Tape geometries table */
QIC_Geom ftgtbl[] = {
{ 0, 0, "Unformatted", "Unknown", 0, 0, 0, 0, 0 }, /* XXX */
{ 1, 1, "QIC-40", "205/550", 20, 68, 2176, 128, 21760 },
{ 1, 2, "QIC-40", "307.5/550", 20, 102, 3264, 128, 32640 },
{ 1, 3, "QIC-40", "295/900", 0, 0, 0, 0, 0 }, /* ??? */
{ 1, 4, "QIC-40", "1100/550", 20, 365, 11680, 128, 32512 },
{ 1, 5, "QIC-40", "1100/900", 0, 0, 0, 0, 0 }, /* ??? */
{ 2, 1, "QIC-80", "205/550", 28, 100, 3200, 128, 19200 },
{ 2, 2, "QIC-80", "307.5/550", 28, 150, 4800, 128, 19200 },
{ 2, 3, "QIC-80", "295/900", 0, 0, 0, 0, 0 }, /* ??? */
{ 2, 4, "QIC-80", "1100/550", 28, 537, 17184, 128, 32512 },
{ 2, 5, "QIC-80", "1100/900", 0, 0, 0, 0, 0 }, /* ??? */
{ 3, 1, "QIC-500", "205/550", 0, 0, 0, 0, 0 }, /* ??? */
{ 3, 2, "QIC-500", "307.5/550", 0, 0, 0, 0, 0 }, /* ??? */
{ 3, 3, "QIC-500", "295/900", 0, 0, 0, 0, 0 }, /* ??? */
{ 3, 4, "QIC-500", "1100/550", 0, 0, 0, 0, 0 }, /* ??? */
{ 3, 5, "QIC-500", "1100/900", 0, 0, 0, 0, 0 } /* ??? */
};
#define NGEOM (sizeof(ftgtbl) / sizeof(QIC_Geom))
QIC_Geom *ftg = NULL; /* Current tape's geometry */
/*
* things relating to asynchronous commands
*/
static int awr_state; /* state of async write */
static int ard_state; /* state of async read */
static int arq_state; /* state of async request */
static int async_retries; /* retries, one per invocation */
static int async_func; /* function to perform */
static int async_state; /* state current function is at */
static int async_arg0; /* up to 3 arguments for async cmds */
static int async_arg1; /**/
static int async_arg2; /**/
static int async_ret; /* return value */
static struct _astk {
int over_func;
int over_state;
int over_retries;
int over_arg0;
int over_arg1;
int over_arg2;
} astk[10];
static struct _astk *astk_ptr = &astk[0]; /* Pointer to stack position */
/* List of valid async (interrupt driven) tape support functions. */
enum {
ACMD_NONE, /* no command */
ACMD_SEEK, /* command seek */
ACMD_STATUS, /* report status */
ACMD_STATE, /* wait for state bits to be true */
ACMD_SEEKSTS, /* perform command and wait for status */
ACMD_READID, /* read id */
ACMD_RUNBLK /* ready tape for I/O on the given block */
};
/* Call another asyncronous command from within async_cmd(). */
#define CALL_ACMD(r,f,a,b,c) \
astk_ptr->over_retries = async_retries; \
astk_ptr->over_func = async_func; \
astk_ptr->over_state = (r); \
astk_ptr->over_arg0 = async_arg0; \
astk_ptr->over_arg1 = async_arg1; \
astk_ptr->over_arg2 = async_arg2; \
async_func = (f); async_state = 0; async_retries = 0; \
async_arg0=(a); async_arg1=(b); async_arg2=(c); \
astk_ptr++; \
goto restate
/* Perform an asyncronous command from outside async_cmd(). */
#define ACMD_FUNC(r,f,a,b,c) over_async = (r); astk_ptr = &astk[0]; \
async_func = (f); async_state = 0; async_retries = 0; \
async_arg0=(a); async_arg1=(b); async_arg2=(c); \
async_cmd(ftu); \
return
/* Various wait channels */
static char *wc_buff_avail = "bavail";
static char *wc_buff_done = "bdone";
static char *wc_iosts_change = "iochg";
static char *wc_long_delay = "ldelay";
static char *wc_intr_wait = "intrw";
#define ftsleep(wc,to) tsleep((caddr_t)(wc),FTPRI,(wc),(to))
/***********************************************************************\
* Per controller structure. *
\***********************************************************************/
extern struct fdc_data fdc_data[NFDC];
/***********************************************************************\
* Per tape drive structure. *
\***********************************************************************/
struct ft_data {
struct fdc_data *fdc; /* pointer to controller structure */
int ftsu; /* this units number on this controller */
int type; /* Drive type (Mountain, Colorado) */
/* QIC_Geom *ftg; */ /* pointer to Current tape's geometry */
int flags;
int cmd_wait; /* Command we are awaiting completion of */
int sts_wait; /* Tape interrupt status of current request */
int io_sts; /* Tape I/O status */
int mode;
int pcn; /* present cylinder number */
int attaching; /* true when ft is attaching */
unsigned char *xptr; /* pointer to buffer blk to xfer */
int xcnt; /* transfer count */
int xblk; /* block number to transfer */
int xseg; /* segment being transferred */
SegReq *segh; /* Current I/O request */
SegReq *segt; /* Tail of queued I/O requests */
SegReq *doneh; /* Completed I/O request queue */
SegReq *donet; /* Completed I/O request tail */
SegReq *segfree; /* Free segments */
SegReq *hdr; /* Current tape header */
int nsegq; /* Segments on request queue */
int ndoneq; /* Segments on completed queue */
int nfreelist; /* Segments on free list */
/* the next 3 should be defines in 'flags' */
int active; /* TRUE if transfer is active */
int rdonly; /* TRUE if tape is read-only */
int newcart; /* TRUE if new cartridge detected */
int laststs; /* last reported status code */
int lastcfg; /* last reported QIC config */
int lasterr; /* last QIC error code */
int lastpos; /* last known segment number */
int moving; /* TRUE if tape is moving */
int rid[7]; /* read_id return values */
} ft_data[NFT];
/***********************************************************************\
* Throughout this file the following conventions will be used: *
* ft is a pointer to the ft_data struct for the drive in question *
* fdc is a pointer to the fdc_data struct for the controller *
* ftu is the tape drive unit number *
* fdcu is the floppy controller unit number *
* ftsu is the tape drive unit number on that controller. (sub-unit) *
\***********************************************************************/
#define id_physid id_scsiid /* this biotab field doubles as a field */
/* for the physical unit number on the controller */
int ftopen(dev_t, int);
int ftclose(dev_t, int);
void ftstrategy(struct buf *);
int ftioctl(dev_t, int, caddr_t, int, struct proc *);
int ftdump(dev_t);
int ftsize(dev_t);
static timeout_t ft_timeout;
static void async_cmd(ftu_t);
static void async_req(ftu_t, int);
static void async_read(ftu_t, int);
static void async_write(ftu_t, int);
static void tape_start(ftu_t, int);
static void tape_end(ftu_t);
static void tape_inactive(ftu_t);
static int tape_cmd(ftu_t, int);
static int tape_status(ftu_t);
static int qic_status(ftu_t, int, int);
static int ftreq_rewind(ftu_t);
static int ftreq_hwinfo(ftu_t, QIC_HWInfo *);
/*****************************************************************************/
/*
* Allocate a segment I/O buffer from the free list.
*/
static SegReq *
segio_alloc(ft_p ft)
{
SegReq *r;
/* Grab first item from free list */
if ((r = ft->segfree) != NULL) {
ft->segfree = ft->segfree->next;
ft->nfreelist--;
}
DPRT(("segio_alloc: nfree=%d ndone=%d nreq=%d\n", ft->nfreelist, ft->ndoneq, ft->nsegq));
return(r);
}
/*
* Queue a segment I/O request.
*/
static void
segio_queue(ft_p ft, SegReq *sp)
{
/* Put request on in process queue. */
if (ft->segt == NULL)
ft->segh = sp;
else
ft->segt->next = sp;
sp->next = NULL;
ft->segt = sp;
ft->nsegq++;
DPRT(("segio_queue: nfree=%d ndone=%d nreq=%d\n", ft->nfreelist, ft->ndoneq, ft->nsegq));
}
/*
* Segment I/O completed, place on correct queue.
*/
static void
segio_done(ft_p ft, SegReq *sp)
{
/* First remove from current I/O queue */
ft->segh = sp->next;
if (ft->segh == NULL) ft->segt = NULL;
ft->nsegq--;
if (sp->reqtype == FTIO_WRITING) {
/* Place on free list */
sp->next = ft->segfree;
ft->segfree = sp;
ft->nfreelist++;
wakeup((caddr_t)wc_buff_avail);
DPRT(("segio_done: (w) nfree=%d ndone=%d nreq=%d\n", ft->nfreelist, ft->ndoneq, ft->nsegq));
} else {
/* Put on completed I/O queue */
if (ft->donet == NULL)
ft->doneh = sp;
else
ft->donet->next = sp;
sp->next = NULL;
ft->donet = sp;
ft->ndoneq++;
wakeup((caddr_t)wc_buff_done);
DPRT(("segio_done: (r) nfree=%d ndone=%d nreq=%d\n", ft->nfreelist, ft->ndoneq, ft->nsegq));
}
}
/*
* Take I/O request from finished queue to free queue.
*/
static void
segio_free(ft_p ft, SegReq *sp)
{
/* First remove from done queue */
ft->doneh = sp->next;
if (ft->doneh == NULL) ft->donet = NULL;
ft->ndoneq--;
/* Place on free list */
sp->next = ft->segfree;
ft->segfree = sp;
ft->nfreelist++;
wakeup((caddr_t)wc_buff_avail);
DPRT(("segio_free: nfree=%d ndone=%d nreq=%d\n", ft->nfreelist, ft->ndoneq, ft->nsegq));
}
static int ft_externalize(struct proc *, struct kern_devconf *, void *,
size_t);
extern struct kern_devconf kdc_fdc[];
static struct kern_devconf kdc_ft[NFT] = { {
0, 0, 0, /* filled in by kern_devconf.c */
"ft", 0, { MDDT_DISK, 0 },
ft_externalize, 0, 0, DISK_EXTERNALLEN,
0, /* parent */
0, /* parentdata */
DC_IDLE, /* state */
"floppy tape",
DC_CLS_TAPE /* class */
} };
static inline void
ft_registerdev(int ctlr, int unit)
{
if(unit != 0)
kdc_ft[unit] = kdc_ft[0];
kdc_ft[unit].kdc_unit = unit;
kdc_ft[unit].kdc_parent = &kdc_fdc[ctlr];
kdc_ft[unit].kdc_parentdata = 0;
dev_attach(&kdc_ft[unit]);
}
static int
ft_externalize(struct proc *p, struct kern_devconf *kdc, void *userp,
size_t len)
{
return disk_externalize(ft_data[kdc->kdc_unit].ftsu, userp, &len);
}
/*
* Probe/attach floppy tapes.
*/
int
ftattach(isadev, fdup, unithasfd)
struct isa_device *isadev, *fdup;
int unithasfd;
{
fdcu_t fdcu = isadev->id_unit; /* fdc active unit */
fdc_p fdc = fdc_data + fdcu; /* pointer to controller structure */
ftu_t ftu = fdup->id_unit;
ft_p ft;
ftsu_t ftsu = fdup->id_physid;
QIC_HWInfo hw;
char *manu;
if (ftu >= NFT) return 0;
ft = &ft_data[ftu];
/* Probe for tape */
ft->attaching = 1;
ft->type = NO_TYPE;
ft->fdc = fdc;
ft->ftsu = ftsu;
/*
* FT_NONE - no method, just do it
*/
tape_start(ftu, 0);
if (tape_status(ftu) >= 0) {
ft->type = FT_NONE;
ftreq_hwinfo(ftu, &hw);
goto out;
}
/*
* FT_COLORADO - colorado style
*/
tape_start(ftu, 0);
tape_cmd(ftu, QC_COL_ENABLE1);
tape_cmd(ftu, QC_COL_ENABLE2 + ftu);
if (tape_status(ftu) >= 0) {
ft->type = FT_COLORADO;
ftreq_hwinfo(ftu, &hw);
tape_cmd(ftu, QC_COL_DISABLE);
goto out;
}
/*
* FT_MOUNTAIN - mountain style
*/
tape_start(ftu, 0);
tape_cmd(ftu, QC_MTN_ENABLE1);
tape_cmd(ftu, QC_MTN_ENABLE2);
if (tape_status(ftu) >= 0) {
ft->type = FT_MOUNTAIN;
ftreq_hwinfo(ftu, &hw);
tape_cmd(ftu, QC_MTN_DISABLE);
goto out;
}
if(isadev->id_flags & FT_PROBE) {
/*
* Insight probe is dangerous, since it requires the motor being
* enabled and therefore risks attached floppy disk drives to jam.
* Probe only if explicitly requested by a flag 0x1 from config
*/
/*
* FT_INSIGHT - insight style
*
* Since insight requires turning the drive motor on, we will not
* perform this probe if a floppy drive was already found with the
* the given unit and controller.
*/
if (unithasfd) goto out;
tape_start(ftu, 1);
if (tape_status(ftu) >= 0) {
ft->type = FT_INSIGHT;
ftreq_hwinfo(ftu, &hw);
goto out;
}
}
out:
tape_end(ftu);
if (ft->type != NO_TYPE) {
fdc->flags |= FDC_HASFTAPE;
ft_registerdev(fdcu, ftu);
switch(hw.hw_make) {
case 0x0000:
if (ft->type == FT_COLORADO) {
manu = "Colorado";
kdc_ft[ftu].kdc_description = "Colorado floppy tape";
} else if (ft->type == FT_INSIGHT) {
manu = "Insight";
kdc_ft[ftu].kdc_description = "Insight floppy tape";
} else if (ft->type == FT_MOUNTAIN && hw.hw_model == 0x05) {
manu = "Archive";
kdc_ft[ftu].kdc_description = "Archive floppy tape";
} else if (ft->type == FT_MOUNTAIN) {
manu = "Mountain";
kdc_ft[ftu].kdc_description = "Mountain floppy tape";
} else {
manu = "Unknown";
}
break;
case 0x0001:
manu = "Colorado";
kdc_ft[ftu].kdc_description = "Colorado floppy tape";
break;
case 0x0005:
if (hw.hw_model >= 0x09) {
manu = "Conner";
kdc_ft[ftu].kdc_description = "Conner floppy tape";
} else {
manu = "Archive";
kdc_ft[ftu].kdc_description = "Archive floppy tape";
}
break;
case 0x0006:
manu = "Mountain";
kdc_ft[ftu].kdc_description = "Mountain floppy tape";
break;
case 0x0007:
manu = "Wangtek";
kdc_ft[ftu].kdc_description = "Wangtek floppy tape";
break;
case 0x0222:
manu = "IOMega";
kdc_ft[ftu].kdc_description = "IOMega floppy tape";
break;
default:
manu = "Unknown";
break;
}
printf("ft%d: %s tape\n", fdup->id_unit, manu);
}
ft->attaching = 0;
return(ft->type);
}
/*
* Perform common commands asynchronously.
*/
static void
async_cmd(ftu_t ftu) {
ft_p ft = &ft_data[ftu];
fdcu_t fdcu = ft->fdc->fdcu;
int cmd, i, st0, st3, pcn;
static int bitn, retval, retpos, nbits, newcn;
static int wanttrk, wantblk, wantdir;
static int curtrk, curblk, curdir, curdiff;
static int errcnt = 0;
restate:
#if FTDBGALL
DPRT(("async_cmd state: func: %d state: %d\n", async_func, async_state));
#endif
switch(async_func) {
case ACMD_SEEK:
/*
* Arguments:
* 0 - command to perform
*/
switch (async_state) {
case 0:
cmd = async_arg0;
#if FTDBGALL
DPRT(("===>async_seek cmd = %d\n", cmd));
#endif
newcn = (cmd <= ft->pcn) ? ft->pcn - cmd : ft->pcn + cmd;
async_state = 1;
i = 0;
if (out_fdc(fdcu, NE7CMD_SEEK) < 0) i = 1;
if (!i && out_fdc(fdcu, ftu) < 0) i = 1;
if (!i && out_fdc(fdcu, newcn) < 0) i = 1;
if (i) {
if (++async_retries >= 10) {
DPRT(("ft%d: async_cmd command seek failed!!\n", ftu));
goto complete;
}
DPRT(("ft%d: async_cmd command seek retry...\n",ftu));
async_state = 0;
goto restate;
}
break;
case 1:
out_fdc(fdcu, NE7CMD_SENSEI);
st0 = in_fdc(fdcu);
pcn = in_fdc(fdcu);
if (st0 < 0 || pcn < 0 || newcn != pcn) {
if (++async_retries >= 10) {
DPRT(("ft%d: async_cmd seek retries exceeded\n",ftu));
goto complete;
}
DPRT(("ft%d: async_cmd command bad st0=$%02x pcn=$%02x\n",
ftu, st0, pcn));
async_state = 0;
timeout(ft_timeout, (caddr_t)ftu, hz/10);
break;
}
if (st0 & 0x20) { /* seek done */
ft->pcn = pcn;
}
#if FTDBGALL
else
DPRT(("ft%d: async_seek error st0 = $%02x pcn = %d\n",
ftu, st0, pcn));
#endif
if (async_arg1) goto complete;
async_state = 2;
timeout(ft_timeout, (caddr_t)ftu, hz/50);
break;
case 2:
goto complete;
/* NOTREACHED */
}
break;
case ACMD_STATUS:
/*
* Arguments:
* 0 - command to issue report from
* 1 - number of bits
* modifies: bitn, retval, st3
*/
switch (async_state) {
case 0:
bitn = 0;
retval = 0;
cmd = async_arg0;
nbits = async_arg1;
DPRT(("async_status got cmd = %d nbits = %d\n", cmd,nbits));
CALL_ACMD(5, ACMD_SEEK, QC_NEXTBIT, 0, 0);
/* NOTREACHED */
case 1:
out_fdc(fdcu, NE7CMD_SENSED);
out_fdc(fdcu, ftu);
st3 = in_fdc(fdcu);
if (st3 < 0) {
DPRT(("ft%d: async_status timed out on bit %d r=$%02x\n",
ftu,bitn,retval));
async_ret = -1;
goto complete;
}
if ((st3 & 0x10) != 0) retval |= (1 << bitn);
bitn++;
if (bitn >= (nbits+2)) {
if ((retval & 1) && (retval & (1 << (nbits+1)))) {
async_ret = (retval & ~(1<<(nbits+1))) >> 1;
if (async_arg0 == QC_STATUS && async_arg2 == 0 &&
(async_ret & (QS_ERROR|QS_NEWCART))) {
async_state = 2;
goto restate;
}
DPRT(("async status got $%04x ($%04x)\n", async_ret,retval));
} else {
DPRT(("ft%d: async_status failed: retval=$%04x nbits=%d\n",
ftu, retval,nbits));
async_ret = -2;
}
goto complete;
}
CALL_ACMD(1, ACMD_SEEK, QC_NEXTBIT, 0, 0);
/* NOTREACHED */
case 2:
if (async_ret & QS_NEWCART) ft->newcart = 1;
CALL_ACMD(3, ACMD_STATUS, QC_ERRCODE, 16, 1);
case 3:
ft->lasterr = async_ret;
if ((ft->lasterr & QS_NEWCART) == 0 && ft->lasterr) {
DPRT(("ft%d: QIC error %d occurred on cmd %d\n",
ftu, ft->lasterr & 0xff, ft->lasterr >> 8));
}
cmd = async_arg0;
nbits = async_arg1;
CALL_ACMD(4, ACMD_STATUS, QC_STATUS, 8, 1);
case 4:
goto complete;
case 5:
CALL_ACMD(6, ACMD_SEEK, QC_NEXTBIT, 0, 0);
case 6:
CALL_ACMD(7, ACMD_SEEK, QC_NEXTBIT, 0, 0);
case 7:
CALL_ACMD(8, ACMD_SEEK, QC_NEXTBIT, 0, 0);
case 8:
cmd = async_arg0;
CALL_ACMD(1, ACMD_SEEK, cmd, 0, 0);
}
break;
case ACMD_STATE:
/*
* Arguments:
* 0 - status bits to check
*/
switch(async_state) {
case 0:
CALL_ACMD(1, ACMD_STATUS, QC_STATUS, 8, 0);
case 1:
if ((async_ret & async_arg0) != 0) goto complete;
async_state = 0;
if (++async_retries == 360) { /* 90 secs. */
DPRT(("ft%d: acmd_state exceeded retry count\n", ftu));
goto complete;
}
timeout(ft_timeout, (caddr_t)ftu, hz/4);
break;
}
break;
case ACMD_SEEKSTS:
/*
* Arguments:
* 0 - command to perform
* 1 - status bits to check
* 2 - (optional) seconds to wait until completion
*/
switch(async_state) {
case 0:
cmd = async_arg0;
async_retries = (async_arg2) ? (async_arg2 * 4) : 10;
CALL_ACMD(1, ACMD_SEEK, cmd, 0, 0);
case 1:
CALL_ACMD(2, ACMD_STATUS, QC_STATUS, 8, 0);
case 2:
if ((async_ret & async_arg1) != 0) goto complete;
if (--async_retries == 0) {
DPRT(("ft%d: acmd_seeksts retries exceeded\n", ftu));
goto complete;
}
async_state = 1;
timeout(ft_timeout, (caddr_t)ftu, hz/4);
break;
}
break;
case ACMD_READID:
/*
* Arguments: (none)
*/
switch(async_state) {
case 0:
if (!ft->moving) {
CALL_ACMD(4, ACMD_SEEKSTS, QC_STOP, QS_READY, 0);
/* NOTREACHED */
}
async_state = 1;
out_fdc(fdcu, 0x4a); /* READ_ID */
out_fdc(fdcu, ftu);
break;
case 1:
for (i = 0; i < 7; i++) ft->rid[i] = in_fdc(fdcu);
async_ret = (ft->rid[3]*ftg->g_fdtrk) +
(ft->rid[4]*ftg->g_fdside) + ft->rid[5] - 1;
DPRT(("readid st0:%02x st1:%02x st2:%02x c:%d h:%d s:%d pos:%d\n",
ft->rid[0], ft->rid[1], ft->rid[2], ft->rid[3],
ft->rid[4], ft->rid[5], async_ret));
if ((ft->rid[0] & 0xc0) != 0 || async_ret < 0) {
/*
* Method for retry:
* errcnt == 1 regular retry
* 2 microstep head 1
* 3 microstep head 2
* 4 microstep head back to 0
* 5 fail
*/
if (++errcnt >= 5) {
DPRT(("ft%d: acmd_readid errcnt exceeded\n", fdcu));
async_ret = -2;
errcnt = 0;
goto complete;
}
if (errcnt == 1) {
ft->moving = 0;
CALL_ACMD(4, ACMD_SEEKSTS, QC_STOP, QS_READY, 0);
} else {
ft->moving = 0;
CALL_ACMD(4, ACMD_SEEKSTS, QC_STPAUSE, QS_READY, 0);
}
DPRT(("readid retry %d...\n", errcnt));
async_state = 0;
goto restate;
}
if ((async_ret % ftg->g_blktrk) == (ftg->g_blktrk-1)) {
DPRT(("acmd_readid detected last block on track\n"));
retpos = async_ret;
CALL_ACMD(2, ACMD_STATE, QS_BOT|QS_EOT, 0, 0);
/* NOTREACHED */
}
ft->lastpos = async_ret;
errcnt = 0;
goto complete;
/* NOTREACHED */
case 2:
CALL_ACMD(3, ACMD_STATE, QS_READY, 0, 0);
case 3:
ft->moving = 0;
async_ret = retpos+1;
goto complete;
case 4:
CALL_ACMD(5, ACMD_SEEK, QC_FORWARD, 0, 0);
case 5:
ft->moving = 1;
async_state = 0;
timeout(ft_timeout, (caddr_t)ftu, hz/10); /* XXX */
break;
}
break;
case ACMD_RUNBLK:
/*
* Arguments:
* 0 - block number I/O will be performed on
*
* modifies: curpos
*/
switch (async_state) {
case 0:
wanttrk = async_arg0 / ftg->g_blktrk;
wantblk = async_arg0 % ftg->g_blktrk;
wantdir = wanttrk & 1;
ft->moving = 0;
CALL_ACMD(1, ACMD_SEEKSTS, QC_STOP, QS_READY, 0);
case 1:
curtrk = wanttrk;
curdir = curtrk & 1;
DPRT(("Changing to track %d\n", wanttrk));
CALL_ACMD(2, ACMD_SEEK, QC_SEEKTRACK, 0, 0);
case 2:
cmd = wanttrk+2;
CALL_ACMD(3, ACMD_SEEKSTS, cmd, QS_READY, 0);
case 3:
CALL_ACMD(4, ACMD_STATUS, QC_STATUS, 8, 0);
case 4:
ft->laststs = async_ret;
if (wantblk == 0) {
curblk = 0;
cmd = (wantdir) ? QC_SEEKEND : QC_SEEKSTART;
CALL_ACMD(6, ACMD_SEEKSTS, cmd, QS_READY, 90);
}
if (ft->laststs & QS_BOT) {
DPRT(("Tape is at BOT\n"));
curblk = (wantdir) ? 4800 : 0;
async_state = 6;
goto restate;
}
if (ft->laststs & QS_EOT) {
DPRT(("Tape is at EOT\n"));
curblk = (wantdir) ? 0 : 4800;
async_state = 6;
goto restate;
}
CALL_ACMD(5, ACMD_READID, 0, 0, 0);
case 5:
if (async_ret < 0) {
ft->moving = 0;
ft->lastpos = -2;
if (async_ret == -2) {
CALL_ACMD(9, ACMD_SEEKSTS, QC_STOP, QS_READY, 0);
}
CALL_ACMD(1, ACMD_SEEKSTS, QC_STOP, QS_READY, 0);
}
curtrk = (async_ret+1) / ftg->g_blktrk;
curblk = (async_ret+1) % ftg->g_blktrk;
DPRT(("gotid: curtrk=%d wanttrk=%d curblk=%d wantblk=%d\n",
curtrk, wanttrk, curblk, wantblk));
if (curtrk != wanttrk) { /* oops! */
DPRT(("oops!! wrong track!\n"));
CALL_ACMD(1, ACMD_SEEKSTS, QC_STOP, QS_READY, 0);
}
async_state = 6;
goto restate;
case 6:
DPRT(("curtrk = %d nextblk = %d\n", curtrk, curblk));
if (curblk == wantblk) {
ft->lastpos = curblk - 1;
async_ret = ft->lastpos;
if (ft->moving) goto complete;
CALL_ACMD(7, ACMD_STATE, QS_READY, 0, 0);
}
if (curblk > wantblk) { /* passed it */
ft->moving = 0;
CALL_ACMD(10, ACMD_SEEKSTS, QC_STOP, QS_READY, 0);
}
if ((wantblk - curblk) <= 256) { /* approaching it */
CALL_ACMD(5, ACMD_READID, 0, 0, 0);
}
/* way up ahead */
ft->moving = 0;
CALL_ACMD(14, ACMD_SEEKSTS, QC_STOP, QS_READY, 0);
break;
case 7:
ft->moving = 1;
CALL_ACMD(8, ACMD_SEEK, QC_FORWARD, 0, 0);
break;
case 8:
async_state = 9;
timeout(ft_timeout, (caddr_t)ftu, hz/10); /* XXX */
break;
case 9:
goto complete;
case 10:
curdiff = ((curblk - wantblk) / QCV_BLKSEG) + 2;
if (curdiff >= ftg->g_segtrk) curdiff = ftg->g_segtrk - 1;
DPRT(("pos %d past %d, reverse %d\n", curblk, wantblk, curdiff));
CALL_ACMD(11, ACMD_SEEK, QC_SEEKREV, 0, 0);
case 11:
DPRT(("reverse 1 done\n"));
CALL_ACMD(12, ACMD_SEEK, (curdiff & 0xf)+2, 0, 0);
case 12:
DPRT(("reverse 2 done\n"));
CALL_ACMD(13, ACMD_SEEKSTS, ((curdiff>>4)&0xf)+2, QS_READY, 90);
case 13:
CALL_ACMD(5, ACMD_READID, 0, 0, 0);
case 14:
curdiff = ((wantblk - curblk) / QCV_BLKSEG) - 2;
if (curdiff < 0) curdiff = 0;
DPRT(("pos %d before %d, forward %d\n", curblk, wantblk, curdiff));
CALL_ACMD(15, ACMD_SEEK, QC_SEEKFWD, 0, 0);
case 15:
DPRT(("forward 1 done\n"));
CALL_ACMD(16, ACMD_SEEK, (curdiff & 0xf)+2, 0, 0);
case 16:
DPRT(("forward 2 done\n"));
CALL_ACMD(13, ACMD_SEEKSTS, ((curdiff>>4)&0xf)+2, QS_READY, 90);
}
break;
}
return;
complete:
if (astk_ptr != &astk[0]) {
astk_ptr--;
async_retries = astk_ptr->over_retries;
async_func = astk_ptr->over_func;
async_state = astk_ptr->over_state;
async_arg0 = astk_ptr->over_arg0;
async_arg1 = astk_ptr->over_arg1;
async_arg2 = astk_ptr->over_arg2;
goto restate;
}
async_func = ACMD_NONE;
async_state = 0;
switch (ft->io_sts) {
case FTIO_READY:
async_req(ftu, 2);
break;
case FTIO_READING:
case FTIO_RDAHEAD:
async_read(ftu, 2);
break;
case FTIO_WRITING:
async_write(ftu, 2);
break;
default:
DPRT(("ft%d: bad async_cmd ending I/O state!\n", ftu));
break;
}
}
/*
* Entry point for the async request processor.
*/
static void
async_req(ftu_t ftu, int from)
{
ft_p ft = &ft_data[ftu];
SegReq *sp;
static int over_async, lastreq;
int cmd;
if (from == 2) arq_state = over_async;
restate:
switch (arq_state) {
case 0: /* Process segment */
sp = ft->segh;
ft->io_sts = (sp == NULL) ? FTIO_READY : sp->reqtype;
if (ft->io_sts == FTIO_WRITING)
async_write(ftu, from);
else
async_read(ftu, from);
if (ft->io_sts != FTIO_READY) return;
/* Pull buffer from current I/O queue */
if (sp != NULL) {
lastreq = sp->reqtype;
segio_done(ft, sp);
/* If I/O cancelled, clear finished queue. */
if (sp->reqcan) {
while (ft->doneh != NULL)
segio_free(ft, ft->doneh);
lastreq = FTIO_READY;
}
} else
lastreq = FTIO_READY;
/* Detect end of track */
if (((ft->xblk / QCV_BLKSEG) % ftg->g_segtrk) == 0) {
ACMD_FUNC(2, ACMD_STATE, QS_BOT|QS_EOT, 0, 0);
}
arq_state = 1;
goto restate;
case 1: /* Next request */
/* If we have another request queued, start it running. */
if (ft->segh != NULL) {
sp = ft->segh;
sp->reqcrc = 0;
arq_state = ard_state = awr_state = 0;
ft->xblk = sp->reqblk;
ft->xseg = sp->reqseg;
ft->xcnt = 0;
ft->xptr = sp->buff;
DPRT(("I/O reqblk = %d\n", ft->xblk));
goto restate;
}
/* If the last request was reading, do read ahead. */
if ((lastreq == FTIO_READING || lastreq == FTIO_RDAHEAD) &&
(sp = segio_alloc(ft)) != NULL) {
sp->reqtype = FTIO_RDAHEAD;
sp->reqblk = ft->xblk;
sp->reqseg = ft->xseg+1;
sp->reqcrc = 0;
sp->reqcan = 0;
segio_queue(ft, sp);
bzero(sp->buff, QCV_SEGSIZE);
arq_state = ard_state = awr_state = 0;
ft->xblk = sp->reqblk;
ft->xseg = sp->reqseg;
ft->xcnt = 0;
ft->xptr = sp->buff;
DPRT(("Processing readahead reqblk = %d\n", ft->xblk));
goto restate;
}
if (ft->moving) {
DPRT(("No more I/O.. Stopping.\n"));
ft->moving = 0;
ACMD_FUNC(7, ACMD_SEEKSTS, QC_PAUSE, QS_READY, 0);
break;
}
arq_state = 7;
goto restate;
case 2: /* End of track */
ft->moving = 0;
ACMD_FUNC(3, ACMD_STATE, QS_READY, 0, 0);
break;
case 3:
DPRT(("async_req seek head to track %d\n", ft->xblk / ftg->g_blktrk));
ACMD_FUNC(4, ACMD_SEEK, QC_SEEKTRACK, 0, 0);
break;
case 4:
cmd = (ft->xblk / ftg->g_blktrk) + 2;
if (ft->segh != NULL) {
ACMD_FUNC(5, ACMD_SEEKSTS, cmd, QS_READY, 0);
} else {
ACMD_FUNC(7, ACMD_SEEKSTS, cmd, QS_READY, 0);
}
break;
case 5:
ft->moving = 1;
ACMD_FUNC(6, ACMD_SEEK, QC_FORWARD, 0, 0);
break;
case 6:
arq_state = 1;
timeout(ft_timeout, (caddr_t)ftu, hz/10); /* XXX */
break;
case 7:
/* Time to rest. */
ft->active = 0;
ft->lastpos = -2;
/* wakeup those who want an i/o chg */
wakeup((caddr_t)wc_iosts_change);
break;
}
}
/*
* Entry for async read.
*/
static void
async_read(ftu_t ftu, int from)
{
ft_p ft = &ft_data[ftu];
fdcu_t fdcu = ft->fdc->fdcu; /* fdc active unit */
int i, rddta[7];
int where;
static int over_async;
static int retries = 0;
if (from == 2) ard_state = over_async;
restate:
#if FTDBGALL
DPRT(("async_read: state: %d from = %d\n", ard_state, from));
#endif
switch (ard_state) {
case 0: /* Start off */
/* If tape is not at desired position, stop and locate */
if (ft->lastpos != (ft->xblk-1)) {
DPRT(("ft%d: position unknown: lastpos:%d ft->xblk:%d\n",
ftu, ft->lastpos, ft->xblk));
ACMD_FUNC(1, ACMD_RUNBLK, ft->xblk, 0, 0);
}
/* Tape is in position but stopped. */
if (!ft->moving) {
DPRT(("async_read ******STARTING TAPE\n"));
ACMD_FUNC(3, ACMD_STATE, QS_READY, 0, 0);
}
ard_state = 1;
goto restate;
case 1: /* Start DMA */
/* Tape is now moving and in position-- start DMA now! */
isa_dmastart(B_READ, ft->xptr, QCV_BLKSIZE, 2);
out_fdc(fdcu, 0x66); /* read */
out_fdc(fdcu, ftu); /* unit */
out_fdc(fdcu, (ft->xblk % ftg->g_fdside) / ftg->g_fdtrk); /* cylinder */
out_fdc(fdcu, ft->xblk / ftg->g_fdside); /* head */
out_fdc(fdcu, (ft->xblk % ftg->g_fdtrk) + 1); /* sector */
out_fdc(fdcu, 0x03); /* 1K sectors */
out_fdc(fdcu, (ft->xblk % ftg->g_fdtrk) + 1); /* count */
out_fdc(fdcu, 0x74); /* gap length */
out_fdc(fdcu, 0xff); /* transfer size */
ard_state = 2;
break;
case 2: /* DMA completed */
/* Transfer complete, get status */
for (i = 0; i < 7; i++) rddta[i] = in_fdc(fdcu);
isa_dmadone(B_READ, ft->xptr, QCV_BLKSIZE, 2);
#if FTDBGALL
/* Compute where the controller thinks we are */
where = (rddta[3]*ftg->g_fdtrk) + (rddta[4]*ftg->g_fdside)
+ rddta[5]-1;
DPRT(("xfer done: st0:%02x st1:%02x st2:%02x c:%d h:%d s:%d pos:%d want:%d\n",
rddta[0], rddta[1], rddta[2], rddta[3], rddta[4], rddta[5],
where, ft->xblk));
#endif
/* Check for errors */
if ((rddta[0] & 0xc0) != 0x00) {
#if !FTDBGALL
where = (rddta[3]*ftg->g_fdtrk) + (rddta[4]*ftg->g_fdside)
+ rddta[5]-1;
DPRT(("xd: st0:%02x st1:%02x st2:%02x c:%d h:%d s:%d pos:%d want:%d\n",
rddta[0], rddta[1], rddta[2], rddta[3], rddta[4], rddta[5],
where, ft->xblk));
#endif
if ((rddta[1] & 0x04) == 0x04 && retries < 2) {
/* Probably wrong position */
DPRT(("async_read: doing retry %d\n", retries));
ft->lastpos = ft->xblk;
ard_state = 0;
retries++;
goto restate;
} else {
/* CRC/Address-mark/Data-mark, et. al. */
DPRT(("ft%d: CRC error on block %d\n", fdcu, ft->xblk));
ft->segh->reqcrc |= (1 << ft->xcnt);
}
}
/* Otherwise, transfer completed okay. */
retries = 0;
ft->lastpos = ft->xblk;
ft->xblk++;
ft->xcnt++;
ft->xptr += QCV_BLKSIZE;
if (ft->xcnt < QCV_BLKSEG && ft->segh->reqcan == 0) {
ard_state = 0;
goto restate;
}
DPRT(("Read done.. Cancel = %d\n", ft->segh->reqcan));
ft->io_sts = FTIO_READY;
break;
case 3:
ft->moving = 1;
ACMD_FUNC(4, ACMD_SEEK, QC_FORWARD, 0, 0);
break;
case 4:
ard_state = 1;
timeout(ft_timeout, (caddr_t)ftu, hz/10); /* XXX */
break;
default:
DPRT(("ft%d: bad async_read state %d!!\n", ftu, ard_state));
break;
}
}
/*
* Entry for async write. If from is 0, this came from the interrupt
* routine, if it's 1 then it was a timeout, if it's 2, then an
* async_cmd completed.
*/
static void
async_write(ftu_t ftu, int from)
{
ft_p ft = &ft_data[ftu];
fdcu_t fdcu = ft->fdc->fdcu; /* fdc active unit */
int i, rddta[7];
int where;
static int over_async;
static int retries = 0;
if (from == 2) awr_state = over_async;
restate:
#if FTDBGALL
DPRT(("async_write: state: %d from = %d\n", awr_state, from));
#endif
switch (awr_state) {
case 0: /* Start off */
/* If tape is not at desired position, stop and locate */
if (ft->lastpos != (ft->xblk-1)) {
DPRT(("ft%d: position unknown: lastpos:%d ft->xblk:%d\n",
ftu, ft->lastpos, ft->xblk));
ACMD_FUNC(1, ACMD_RUNBLK, ft->xblk, 0, 0);
}
/* Tape is in position but stopped. */
if (!ft->moving) {
DPRT(("async_write ******STARTING TAPE\n"));
ACMD_FUNC(3, ACMD_STATE, QS_READY, 0, 0);
}
awr_state = 1;
goto restate;
case 1: /* Start DMA */
/* Tape is now moving and in position-- start DMA now! */
isa_dmastart(B_WRITE, ft->xptr, QCV_BLKSIZE, 2);
out_fdc(fdcu, 0x45); /* write */
out_fdc(fdcu, ftu); /* unit */
out_fdc(fdcu, (ft->xblk % ftg->g_fdside) / ftg->g_fdtrk); /* cyl */
out_fdc(fdcu, ft->xblk / ftg->g_fdside); /* head */
out_fdc(fdcu, (ft->xblk % ftg->g_fdtrk) + 1); /* sector */
out_fdc(fdcu, 0x03); /* 1K sectors */
out_fdc(fdcu, (ft->xblk % ftg->g_fdtrk) + 1); /* count */
out_fdc(fdcu, 0x74); /* gap length */
out_fdc(fdcu, 0xff); /* transfer size */
awr_state = 2;
break;
case 2: /* DMA completed */
/* Transfer complete, get status */
for (i = 0; i < 7; i++) rddta[i] = in_fdc(fdcu);
isa_dmadone(B_WRITE, ft->xptr, QCV_BLKSIZE, 2);
#if FTDBGALL
/* Compute where the controller thinks we are */
where = (rddta[3]*ftg->g_fdtrk) + (rddta[4]*ftg->g_fdside) + rddta[5]-1;
DPRT(("xfer done: st0:%02x st1:%02x st2:%02x c:%d h:%d s:%d pos:%d want:%d\n",
rddta[0], rddta[1], rddta[2], rddta[3], rddta[4], rddta[5],
where, ft->xblk));
#endif
/* Check for errors */
if ((rddta[0] & 0xc0) != 0x00) {
#if !FTDBGALL
where = (rddta[3]*ftg->g_fdtrk) + (rddta[4]*ftg->g_fdside)
+ rddta[5]-1;
DPRT(("xfer done: st0:%02x st1:%02x st2:%02x c:%d h:%d s:%d pos:%d want:%d\n",
rddta[0], rddta[1], rddta[2], rddta[3], rddta[4], rddta[5],
where, ft->xblk));
#endif
if (retries < 3) {
/* Something happened -- try again */
DPRT(("async_write: doing retry %d\n", retries));
ft->lastpos = ft->xblk;
awr_state = 0;
retries++;
goto restate;
} else {
/*
* Retries failed. Note the unrecoverable error.
* Marking the block as bad is useless right now.
*/
printf("ft%d: unrecoverable write error on block %d\n",
ftu, ft->xblk);
ft->segh->reqcrc |= (1 << ft->xcnt);
}
}
/* Otherwise, transfer completed okay. */
retries = 0;
ft->lastpos = ft->xblk;
ft->xblk++;
ft->xcnt++;
ft->xptr += QCV_BLKSIZE;
if (ft->xcnt < QCV_BLKSEG) {
awr_state = 0; /* next block */
goto restate;
}
#if FTDBGALL
DPRT(("Write done.\n"));
#endif
ft->io_sts = FTIO_READY;
break;
case 3:
ft->moving = 1;
ACMD_FUNC(4, ACMD_SEEK, QC_FORWARD, 0, 0);
break;
case 4:
awr_state = 1;
timeout(ft_timeout, (caddr_t)ftu, hz/10); /* XXX */
break;
default:
DPRT(("ft%d: bad async_write state %d!!\n", ftu, awr_state));
break;
}
}
/*
* Interrupt handler for active tape. Bounced off of fdintr().
*/
int
ftintr(ftu_t ftu)
{
int st0, pcn, i;
ft_p ft = &ft_data[ftu];
fdcu_t fdcu = ft->fdc->fdcu; /* fdc active unit */
int s = splbio();
st0 = 0;
pcn = 0;
/* I/O segment transfer completed */
if (ft->active) {
if (async_func != ACMD_NONE) {
async_cmd(ftu);
splx(s);
return(1);
}
#if FTDBGALL
DPRT(("Got request interrupt\n"));
#endif
async_req(ftu, 0);
splx(s);
return(1);
}
/* Get interrupt status */
if (ft->cmd_wait != FTCMD_READID) {
out_fdc(fdcu, NE7CMD_SENSEI);
st0 = in_fdc(fdcu);
pcn = in_fdc(fdcu);
}
if (ft->cmd_wait == FTCMD_NONE || ft->sts_wait != FTSTS_SNOOZE) {
huh_what:
printf("ft%d: unexpected interrupt; st0 = $%02x pcn = %d\n",
ftu, st0, pcn);
splx(s);
return(1);
}
switch (ft->cmd_wait) {
case FTCMD_RESET:
ft->sts_wait = FTSTS_INTERRUPT;
wakeup((caddr_t)wc_intr_wait);
break;
case FTCMD_RECAL:
case FTCMD_SEEK:
if (st0 & 0x20) { /* seek done */
ft->sts_wait = FTSTS_INTERRUPT;
ft->pcn = pcn;
wakeup((caddr_t)wc_intr_wait);
}
#if FTDBGALL
else
DPRT(("ft%d: seek error st0 = $%02x pcn = %d\n",
ftu, st0, pcn));
#endif
break;
case FTCMD_READID:
for (i = 0; i < 7; i++) ft->rid[i] = in_fdc(fdcu);
ft->sts_wait = FTSTS_INTERRUPT;
wakeup((caddr_t)wc_intr_wait);
break;
default:
goto huh_what;
}
splx(s);
return(1);
}
/*
* Interrupt timeout routine.
*/
static void
ft_timeout(void *arg1)
{
int s;
ftu_t ftu = (ftu_t)arg1;
ft_p ft = &ft_data[ftu];
s = splbio();
if (ft->active) {
if (async_func != ACMD_NONE) {
async_cmd(ftu);
splx(s);
return;
}
async_req(ftu, 1);
} else {
ft->sts_wait = FTSTS_TIMEOUT;
wakeup((caddr_t)wc_intr_wait);
}
splx(s);
}
/*
* Wait for a particular interrupt to occur. ftintr() will wake us up
* if it sees what we want. Otherwise, time out and return error.
* Should always disable ints before trigger is sent and calling here.
*/
static int
ftintr_wait(ftu_t ftu, int cmd, int ticks)
{
int retries, st0, pcn;
ft_p ft = &ft_data[ftu];
fdcu_t fdcu = ft->fdc->fdcu; /* fdc active unit */
ft->cmd_wait = cmd;
ft->sts_wait = FTSTS_SNOOZE;
/* At attach time, we can't rely on having interrupts serviced */
if (ft->attaching) {
switch (cmd) {
case FTCMD_RESET:
DELAY(100);
ft->sts_wait = FTSTS_INTERRUPT;
goto intrdone;
case FTCMD_RECAL:
case FTCMD_SEEK:
for (retries = 0; retries < 10000; retries++) {
DELAY(150);
out_fdc(fdcu, NE7CMD_SENSEI);
st0 = in_fdc(fdcu);
if ((st0 & 0xc0) == 0x80) continue;
pcn = in_fdc(fdcu);
if (st0 & 0x20) {
ft->sts_wait = FTSTS_INTERRUPT;
ft->pcn = pcn;
goto intrdone;
}
}
break;
}
ft->sts_wait = FTSTS_TIMEOUT;
goto intrdone;
}
ftsleep(wc_intr_wait, ticks);
intrdone:
if (ft->sts_wait == FTSTS_TIMEOUT) { /* timeout */
#if FTDBGALL
if (ft->cmd_wait != FTCMD_RESET)
DPRT(("ft%d: timeout on command %d\n", ftu, ft->cmd_wait));
#endif
ft->cmd_wait = FTCMD_NONE;
ft->sts_wait = FTSTS_NONE;
return(1);
}
/* got interrupt */
if (ft->attaching == 0 && ticks) untimeout(ft_timeout, (caddr_t)ftu);
ft->cmd_wait = FTCMD_NONE;
ft->sts_wait = FTSTS_NONE;
return(0);
}
/*
* Recalibrate tape drive. Parameter totape is true, if we should
* recalibrate to tape drive settings.
*/
static int
tape_recal(ftu_t ftu, int totape)
{
int s;
ft_p ft = &ft_data[ftu];
fdcu_t fdcu = ft->fdc->fdcu; /* fdc active unit */
DPRT(("tape_recal start\n"));
out_fdc(fdcu, NE7CMD_SPECIFY);
out_fdc(fdcu, (totape) ? 0xAD : 0xDF);
out_fdc(fdcu, 0x02);
s = splbio();
out_fdc(fdcu, NE7CMD_RECAL);
out_fdc(fdcu, ftu);
if (ftintr_wait(ftu, FTCMD_RECAL, hz)) {
splx(s);
DPRT(("ft%d: recalibrate timeout\n", ftu));
return(1);
}
splx(s);
out_fdc(fdcu, NE7CMD_SPECIFY);
out_fdc(fdcu, (totape) ? 0xFD : 0xDF);
out_fdc(fdcu, 0x02);
DPRT(("tape_recal end\n"));
return(0);
}
/*
* Wait for a particular tape status to be met. If all is TRUE, then
* all states must be met, otherwise any state can be met.
*/
static int
tape_state(ftu_t ftu, int all, int mask, int seconds)
{
int r, tries, maxtries;
maxtries = (seconds) ? (4 * seconds) : 1;
for (tries = 0; tries < maxtries; tries++) {
r = tape_status(ftu);
if (r >= 0) {
if (all && (r & mask) == mask) return(r);
if ((r & mask) != 0) return(r);
}
if (seconds) ftsleep(wc_long_delay, hz/4);
}
DPRT(("ft%d: tape_state failed on mask=$%02x maxtries=%d\n",
ftu, mask, maxtries));
return(-1);
}
/*
* Send a QIC command to tape drive, wait for completion.
*/
static int
tape_cmd(ftu_t ftu, int cmd)
{
int newcn;
int retries = 0;
int s;
ft_p ft = &ft_data[ftu];
fdcu_t fdcu = ft->fdc->fdcu; /* fdc active unit */
DPRT(("===> tape_cmd: %d\n",cmd));
newcn = (cmd <= ft->pcn) ? ft->pcn - cmd : ft->pcn + cmd;
retry:
/* Perform seek */
s = splbio();
out_fdc(fdcu, NE7CMD_SEEK);
out_fdc(fdcu, ftu);
out_fdc(fdcu, newcn);
if (ftintr_wait(ftu, FTCMD_SEEK, hz)) {
DPRT(("ft%d: tape_cmd seek timeout\n", ftu));
redo:
splx(s);
if (++retries < 5) goto retry;
DPRT(("ft%d: tape_cmd seek failed!\n", ftu));
return(1);
}
splx(s);
if (ft->pcn != newcn) {
DPRT(("ft%d: bad seek in tape_cmd; pcn = %d newcn = %d\n",
ftu, ft->pcn, newcn));
goto redo;
}
DELAY(2500);
return(0);
}
/*
* Return status of tape drive
*/
static int
tape_status(ftu_t ftu)
{
int r, err, tries;
ft_p ft = &ft_data[ftu];
int max = (ft->attaching) ? 2 : 3;
for (r = -1, tries = 0; r < 0 && tries < max; tries++)
r = qic_status(ftu, QC_STATUS, 8);
if (tries == max) return(-1);
recheck:
DPRT(("tape_status got $%04x\n",r));
ft->laststs = r;
if (r & (QS_ERROR|QS_NEWCART)) {
err = qic_status(ftu, QC_ERRCODE, 16);
ft->lasterr = err;
if (r & QS_NEWCART) {
ft->newcart = 1;
/* If tape not referenced, do a seek load point. */
if ((r & QS_FMTOK) == 0 && !ft->attaching) {
tape_cmd(ftu, QC_SEEKLP);
do {
ftsleep(wc_long_delay, hz);
} while ((r = qic_status(ftu, QC_STATUS, 8)) < 0 ||
(r & (QS_READY|QS_CART)) == QS_CART);
goto recheck;
}
} else if (err && !ft->attaching) {
DPRT(("ft%d: QIC error %d occurred on cmd %d\n",
ftu, err & 0xff, err >> 8));
}
r = qic_status(ftu, QC_STATUS, 8);
ft->laststs = r;
DPRT(("tape_status got error code $%04x new sts = $%02x\n",err,r));
}
ft->rdonly = (r & QS_RDONLY);
return(r);
}
/*
* Transfer control to tape drive.
*/
static void
tape_start(ftu_t ftu, int motor)
{
ft_p ft = &ft_data[ftu];
fdc_p fdc = ft->fdc;
int s, mbits;
static int mbmotor[] = { FDO_MOEN0, FDO_MOEN1, FDO_MOEN2, FDO_MOEN3 };
s = splbio();
DPRT(("tape_start start\n"));
/* reset, dma disable */
outb(fdc->baseport+FDOUT, 0x00);
(void)ftintr_wait(ftu, FTCMD_RESET, hz/10);
/* raise reset, enable DMA, motor on if needed */
mbits = ftu & 3;
if (motor && ftu < 4)
mbits |= mbmotor[ftu];
outb(fdc->baseport+FDOUT, FDO_FRST | FDO_FDMAEN | mbits);
(void)ftintr_wait(ftu, FTCMD_RESET, hz/10);
splx(s);
tape_recal(ftu, 1);
/* set transfer speed */
outb(fdc->baseport+FDCTL, FDC_500KBPS);
DELAY(10);
DPRT(("tape_start end\n"));
}
/*
* Transfer control back to floppy disks.
*/
static void
tape_end(ftu_t ftu)
{
ft_p ft = &ft_data[ftu];
fdc_p fdc = ft->fdc;
int s;
DPRT(("tape_end start\n"));
tape_recal(ftu, 0);
s = splbio();
/* reset, dma disable */
outb(fdc->baseport+FDOUT, 0x00);
(void)ftintr_wait(ftu, FTCMD_RESET, hz/10);
/* raise reset, enable DMA */
outb(fdc->baseport+FDOUT, FDO_FRST | FDO_FDMAEN);
(void)ftintr_wait(ftu, FTCMD_RESET, hz/10);
splx(s);
/* set transfer speed */
outb(fdc->baseport+FDCTL, FDC_500KBPS);
DELAY(10);
fdc->flags &= ~FDC_TAPE_BUSY;
DPRT(("tape_end end\n"));
}
/*
* Wait for the driver to go inactive, cancel readahead if necessary.
*/
static void
tape_inactive(ftu_t ftu)
{
ft_p ft = &ft_data[ftu];
int s = splbio();
if (ft->segh != NULL) {
if (ft->segh->reqtype == FTIO_RDAHEAD) {
/* cancel read-ahead */
ft->segh->reqcan = 1;
} else if (ft->segh->reqtype == FTIO_WRITING && !ft->active) {
/* flush out any remaining writes */
DPRT(("Flushing write I/O chain\n"));
arq_state = ard_state = awr_state = 0;
ft->xblk = ft->segh->reqblk;
ft->xseg = ft->segh->reqseg;
ft->xcnt = 0;
ft->xptr = ft->segh->buff;
ft->active = 1;
timeout(ft_timeout, (caddr_t)ftu, 1);
}
}
while (ft->active) ftsleep(wc_iosts_change, 0);
splx(s);
}
/*
* Get the geometry of the tape currently in the drive.
*/
static int
ftgetgeom(ftu_t ftu)
{
int r, i, tries;
int cfg, qic80, ext;
int sts, fmt, len;
ft_p ft = &ft_data[ftu];
r = tape_status(ftu);
/* XXX fix me when format mode is finished */
if (r < 0 || (r & QS_CART) == 0 || (r & QS_FMTOK) == 0) {
DPRT(("ftgetgeom: no cart or not formatted 0x%04x\n",r));
ftg = NULL;
ft->newcart = 1;
return(0);
}
/* Report drive configuration */
for (cfg = -1, tries = 0; cfg < 0 && tries < 3; tries++)
cfg = qic_status(ftu, QC_CONFIG, 8);
if (tries == 3) {
DPRT(("ftgetgeom report config failed\n"));
ftg = NULL;
return(-1);
}
DPRT(("ftgetgeom report config got $%04x\n", cfg));
ft->lastcfg = cfg;
qic80 = cfg & QCF_QIC80;
ext = cfg & QCF_EXTRA;
/*
* XXX - This doesn't seem to work on my Colorado Jumbo 250...
* if it works on your drive, I'd sure like to hear about it.
*/
#if 0
/* Report drive status */
for (sts = -1, tries = 0; sts < 0 && tries < 3; tries++)
sts = qic_status(ftu, QC_TSTATUS, 8);
if (tries == 3) {
DPRT(("ftgetgeom report tape status failed\n"));
ftg = NULL;
return(-1);
}
DPRT(("ftgetgeom report tape status got $%04x\n", sts));
#else
/*
* XXX - Forge a fake tape status based upon the returned
* configuration, since the above command or code is broken
* for my drive and probably other older drives.
*/
sts = 0;
sts = (qic80) ? QTS_QIC80 : QTS_QIC40;
sts |= (ext) ? QTS_LEN2 : QTS_LEN1;
#endif
fmt = sts & QTS_FMMASK;
len = (sts & QTS_LNMASK) >> 4;
if (fmt > QCV_NFMT) {
ftg = NULL;
printf("ft%d: unsupported tape format\n", ftu);
return(-1);
}
if (len > QCV_NLEN) {
ftg = NULL;
printf("ft%d: unsupported tape length\n", ftu);
return(-1);
}
/* Look up geometry in the table */
for (i = 1; i < NGEOM; i++)
if (ftgtbl[i].g_fmtno == fmt && ftgtbl[i].g_lenno == len) break;
if (i == NGEOM) {
printf("ft%d: unknown tape geometry\n", ftu);
ftg = NULL;
return(-1);
}
ftg = &ftgtbl[i];
if (!ftg->g_trktape) {
printf("ft%d: unsupported format %s w/len %s\n",
ftu, ftg->g_fmtdesc, ftg->g_lendesc);
ftg = NULL;
return(-1);
}
DPRT(("Tape format is %s, length is %s\n", ftg->g_fmtdesc, ftg->g_lendesc));
ft->newcart = 0;
return(0);
}
/*
* Switch between tape/floppy. This will send the tape enable/disable
* codes for this drive's manufacturer.
*/
static int
set_fdcmode(dev_t dev, int newmode)
{
ftu_t ftu = FDUNIT(minor(dev));
ft_p ft = &ft_data[ftu];
fdc_p fdc = ft->fdc;
static int havebufs = 0;
int i;
SegReq *sp, *rsp;
if (newmode == FDC_TAPE_MODE) {
/* Wake up the tape drive */
switch (ft->type) {
case NO_TYPE:
fdc->flags &= ~FDC_TAPE_BUSY;
return(ENXIO);
case FT_NONE:
tape_start(ftu, 0);
break;
case FT_COLORADO:
tape_start(ftu, 0);
if (tape_cmd(ftu, QC_COL_ENABLE1)) {
tape_end(ftu);
return(EIO);
}
if (tape_cmd(ftu, QC_COL_ENABLE2 + ftu)) {
tape_end(ftu);
return(EIO);
}
break;
case FT_MOUNTAIN:
tape_start(ftu, 0);
if (tape_cmd(ftu, QC_MTN_ENABLE1)) {
tape_end(ftu);
return(EIO);
}
if (tape_cmd(ftu, QC_MTN_ENABLE2)) {
tape_end(ftu);
return(EIO);
}
break;
case FT_INSIGHT:
tape_start(ftu, 1);
break;
default:
DPRT(("ft%d: bad tape type\n", ftu));
return(ENXIO);
}
if (tape_status(ftu) < 0) {
if (ft->type == FT_COLORADO)
tape_cmd(ftu, QC_COL_DISABLE);
else if (ft->type == FT_MOUNTAIN)
tape_cmd(ftu, QC_MTN_DISABLE);
tape_end(ftu);
return(EIO);
}
/* Grab buffers from memory. */
if (!havebufs) {
ft->segh = ft->segt = NULL;
ft->doneh = ft->donet = NULL;
ft->segfree = NULL;
ft->hdr = NULL;
ft->nsegq = ft->ndoneq = ft->nfreelist = 0;
for (i = 0; i < FTNBUFF; i++) {
sp = malloc(sizeof(SegReq), M_DEVBUF, M_WAITOK);
if (sp == NULL) {
printf("ft%d: not enough memory for buffers\n", ftu);
for (sp=ft->segfree; sp != NULL; sp=sp->next)
free(sp, M_DEVBUF);
if (ft->type == FT_COLORADO)
tape_cmd(ftu, QC_COL_DISABLE);
else if (ft->type == FT_MOUNTAIN)
tape_cmd(ftu, QC_MTN_DISABLE);
tape_end(ftu);
return(ENOMEM);
}
sp->reqtype = FTIO_READY;
sp->next = ft->segfree;
ft->segfree = sp;
ft->nfreelist++;
}
/* take one buffer for header */
ft->hdr = ft->segfree;
ft->segfree = ft->segfree->next;
ft->nfreelist--;
havebufs = 1;
}
ft->io_sts = FTIO_READY; /* tape drive is ready */
ft->active = 0; /* interrupt driver not active */
ft->moving = 0; /* tape not moving */
ft->rdonly = 0; /* tape read only */
ft->newcart = 0; /* new cartridge flag */
ft->lastpos = -1; /* tape is rewound */
async_func = ACMD_NONE; /* No async function */
tape_state(ftu, 0, QS_READY, 60);
tape_cmd(ftu, QC_RATE);
tape_cmd(ftu, QCF_RT500+2); /* 500K bps */
tape_state(ftu, 0, QS_READY, 60);
ft->mode = FTM_PRIMARY;
tape_cmd(ftu, QC_PRIMARY); /* Make sure we're in primary mode */
tape_state(ftu, 0, QS_READY, 60);
ftg = NULL; /* No geometry yet */
ftgetgeom(ftu); /* Get tape geometry */
ftreq_rewind(ftu); /* Make sure tape is rewound */
} else {
if (ft->type == FT_COLORADO)
tape_cmd(ftu, QC_COL_DISABLE);
else if (ft->type == FT_MOUNTAIN)
tape_cmd(ftu, QC_MTN_DISABLE);
tape_end(ftu);
ft->newcart = 0; /* clear new cartridge */
if (ft->hdr != NULL) free(ft->hdr, M_DEVBUF);
if (havebufs) {
for (sp = ft->segfree; sp != NULL;) {
rsp = sp; sp = sp->next;
free(rsp, M_DEVBUF);
}
for (sp = ft->segh; sp != NULL;) {
rsp = sp; sp = sp->next;
free(rsp, M_DEVBUF);
}
for (sp = ft->doneh; sp != NULL;) {
rsp = sp; sp = sp->next;
free(rsp, M_DEVBUF);
}
}
havebufs = 0;
}
return(0);
}
/*
* Perform a QIC status function.
*/
static int
qic_status(ftu_t ftu, int cmd, int nbits)
{
int st3, r, i;
ft_p ft = &ft_data[ftu];
fdcu_t fdcu = ft->fdc->fdcu; /* fdc active unit */
if (tape_cmd(ftu, cmd)) {
DPRT(("ft%d: QIC status timeout\n", ftu));
return(-1);
}
/* Sense drive status */
out_fdc(fdcu, NE7CMD_SENSED);
out_fdc(fdcu, ftu);
st3 = in_fdc(fdcu);
if ((st3 & 0x10) == 0) { /* track 0 */
DPRT(("qic_status has dead drive... st3 = $%02x\n", st3));
return(-1);
}
for (i = r = 0; i <= nbits; i++) {
if (tape_cmd(ftu, QC_NEXTBIT)) {
DPRT(("ft%d: QIC status bit timed out on %d\n", ftu, i));
return(-1);
}
out_fdc(fdcu, NE7CMD_SENSED);
out_fdc(fdcu, ftu);
st3 = in_fdc(fdcu);
if (st3 < 0) {
DPRT(("ft%d: controller timed out on bit %d r=$%02x\n",
ftu, i, r));
return(-1);
}
r >>= 1;
if (i < nbits)
r |= ((st3 & 0x10) ? 1 : 0) << nbits;
else if ((st3 & 0x10) == 0) {
DPRT(("ft%d: qic status stop bit missing at %d, st3=$%02x r=$%04x\n",
ftu,i,st3,r));
return(-1);
}
}
DPRT(("qic_status returned $%02x\n", r));
return(r);
}
/*
* Open tape drive for use. Bounced off of Fdopen if tape minor is
* detected.
*/
int
ftopen(dev_t dev, int arg2) {
ftu_t ftu = FDUNIT(minor(dev));
fdc_p fdc;
/* check bounds */
if (ftu >= NFT)
return(ENXIO);
fdc = ft_data[ftu].fdc;
if ((fdc == NULL) || (ft_data[ftu].type == NO_TYPE))
return(ENXIO);
/* check for controller already busy with tape */
if (fdc->flags & FDC_TAPE_BUSY)
return(EBUSY);
/* make sure we found a tape when probed */
if (!(fdc->flags & FDC_HASFTAPE))
return(ENODEV);
fdc->fdu = ftu;
fdc->flags |= FDC_TAPE_BUSY;
kdc_ft[ftu].kdc_state = DC_BUSY;
return(set_fdcmode(dev, FDC_TAPE_MODE)); /* try to switch to tape */
}
/*
* Close tape and return floppy controller to disk mode.
*/
int
ftclose(dev_t dev, int flags)
{
ftu_t ftu = FDUNIT(minor(dev));
ft_p ft = &ft_data[ftu];
/* Wait for any remaining I/O activity to complete. */
tape_inactive(ftu);
ft->mode = FTM_PRIMARY;
tape_cmd(ftu, QC_PRIMARY);
tape_state(ftu, 0, QS_READY, 60);
ftreq_rewind(ftu);
kdc_ft[ftu].kdc_state = DC_IDLE;
return(set_fdcmode(dev, FDC_DISK_MODE)); /* Otherwise, close tape */
}
/*
* Perform strategy on a given buffer (not!). Changed so that the
* driver will at least return 'Operation not supported'.
*/
void
ftstrategy(struct buf *bp)
{
bp->b_error = ENODEV;
bp->b_flags |= B_ERROR;
biodone(bp);
}
/*
* Read or write a segment.
*/
static int
ftreq_rw(ftu_t ftu, int cmd, QIC_Segment *sr, struct proc *p)
{
int r, i;
SegReq *sp;
int s;
long blk, bad, seg;
unsigned char *cp, *cp2;
ft_p ft = &ft_data[ftu];
if (!ft->active && ft->segh == NULL) {
r = tape_status(ftu);
if ((r & QS_CART) == 0)
return(ENXIO); /* No cartridge */
if ((r & QS_FMTOK) == 0)
return(ENXIO); /* Not formatted */
tape_state(ftu, 0, QS_READY, 90);
}
if (ftg == NULL || ft->newcart) {
tape_inactive(ftu);
tape_state(ftu, 0, QS_READY, 90);
if (ftgetgeom(ftu) < 0)
return(ENXIO);
}
/* Write not allowed on a read-only tape. */
if (cmd == QIOWRITE && ft->rdonly)
return(EROFS);
/* Quick check of request and buffer. */
if (sr == NULL || sr->sg_data == NULL)
return(EINVAL);
/* Make sure requested track and segment is in range. */
if (sr->sg_trk >= ftg->g_trktape || sr->sg_seg >= ftg->g_segtrk)
return(EINVAL);
blk = sr->sg_trk * ftg->g_blktrk + sr->sg_seg * QCV_BLKSEG;
seg = sr->sg_trk * ftg->g_segtrk + sr->sg_seg;
s = splbio();
if (cmd == QIOREAD) {
/*
* See if the driver is reading ahead.
*/
if (ft->doneh != NULL ||
(ft->segh != NULL && ft->segh->reqtype == FTIO_RDAHEAD)) {
/*
* Eat the completion queue and see if the request
* is already there.
*/
while (ft->doneh != NULL) {
if (blk == ft->doneh->reqblk) {
sp = ft->doneh;
sp->reqtype = FTIO_READING;
sp->reqbad = sr->sg_badmap;
goto rddone;
}
segio_free(ft, ft->doneh);
}
/*
* Not on the completed queue, in progress maybe?
*/
if (ft->segh != NULL && ft->segh->reqtype == FTIO_RDAHEAD &&
blk == ft->segh->reqblk) {
sp = ft->segh;
sp->reqtype = FTIO_READING;
sp->reqbad = sr->sg_badmap;
goto rdwait;
}
}
/* Wait until we're ready. */
tape_inactive(ftu);
/* Set up a new read request. */
sp = segio_alloc(ft);
sp->reqcrc = 0;
sp->reqbad = sr->sg_badmap;
sp->reqblk = blk;
sp->reqseg = seg;
sp->reqcan = 0;
sp->reqtype = FTIO_READING;
segio_queue(ft, sp);
/* Start the read request off. */
DPRT(("Starting read I/O chain\n"));
arq_state = ard_state = awr_state = 0;
ft->xblk = sp->reqblk;
ft->xseg = sp->reqseg;
ft->xcnt = 0;
ft->xptr = sp->buff;
ft->active = 1;
timeout(ft_timeout, (caddr_t)ftu, 1);
rdwait:
ftsleep(wc_buff_done, 0);
rddone:
bad = sp->reqbad;
sr->sg_crcmap = sp->reqcrc & ~bad;
/* Copy out segment and discard bad mapped blocks. */
cp = sp->buff; cp2 = sr->sg_data;
for (i = 0; i < QCV_BLKSEG; cp += QCV_BLKSIZE, i++) {
if (bad & (1 << i)) continue;
copyout(cp, cp2, QCV_BLKSIZE);
cp2 += QCV_BLKSIZE;
}
segio_free(ft, sp);
} else {
if (ft->segh != NULL && ft->segh->reqtype != FTIO_WRITING)
tape_inactive(ftu);
/* Allocate a buffer and start tape if we're running low. */
sp = segio_alloc(ft);
if (!ft->active && (sp == NULL || ft->nfreelist <= 1)) {
DPRT(("Starting write I/O chain\n"));
arq_state = ard_state = awr_state = 0;
ft->xblk = ft->segh->reqblk;
ft->xseg = ft->segh->reqseg;
ft->xcnt = 0;
ft->xptr = ft->segh->buff;
ft->active = 1;
timeout(ft_timeout, (caddr_t)ftu, 1);
}
/* Sleep until a buffer becomes available. */
while (sp == NULL) {
ftsleep(wc_buff_avail, 0);
sp = segio_alloc(ft);
}
/* Copy in segment and expand bad blocks. */
bad = sr->sg_badmap;
cp = sr->sg_data; cp2 = sp->buff;
for (i = 0; i < QCV_BLKSEG; cp2 += QCV_BLKSIZE, i++) {
if (bad & (1 << i)) continue;
copyin(cp, cp2, QCV_BLKSIZE);
cp += QCV_BLKSIZE;
}
sp->reqblk = blk;
sp->reqseg = seg;
sp->reqcan = 0;
sp->reqtype = FTIO_WRITING;
segio_queue(ft, sp);
}
splx(s);
return(0);
}
/*
* Rewind to beginning of tape
*/
static int
ftreq_rewind(ftu_t ftu)
{
ft_p ft = &ft_data[ftu];
tape_inactive(ftu);
tape_cmd(ftu, QC_STOP);
tape_state(ftu, 0, QS_READY, 90);
tape_cmd(ftu, QC_SEEKSTART);
tape_state(ftu, 0, QS_READY, 90);
tape_cmd(ftu, QC_SEEKTRACK);
tape_cmd(ftu, 2);
tape_state(ftu, 0, QS_READY, 90);
ft->lastpos = -1;
ft->moving = 0;
return(0);
}
/*
* Move to logical beginning or end of track
*/
static int
ftreq_trkpos(ftu_t ftu, int req)
{
int curtrk, r, cmd;
ft_p ft = &ft_data[ftu];
tape_inactive(ftu);
tape_cmd(ftu, QC_STOP);
tape_state(ftu, 0, QS_READY, 90);
r = tape_status(ftu);
if ((r & QS_CART) == 0) return(ENXIO); /* No cartridge */
if ((r & QS_FMTOK) == 0) return(ENXIO); /* Not formatted */
if (ftg == NULL || ft->newcart) {
if (ftgetgeom(ftu) < 0) return(ENXIO);
}
curtrk = (ft->lastpos < 0) ? 0 : ft->lastpos / ftg->g_blktrk;
if (req == QIOBOT)
cmd = (curtrk & 1) ? QC_SEEKEND : QC_SEEKSTART;
else
cmd = (curtrk & 1) ? QC_SEEKSTART : QC_SEEKEND;
tape_cmd(ftu, cmd);
tape_state(ftu, 0, QS_READY, 90);
return(0);
}
/*
* Seek tape head to a particular track.
*/
static int
ftreq_trkset(ftu_t ftu, int *trk)
{
int r;
ft_p ft = &ft_data[ftu];
tape_inactive(ftu);
tape_cmd(ftu, QC_STOP);
tape_state(ftu, 0, QS_READY, 90);
r = tape_status(ftu);
if ((r & QS_CART) == 0) return(ENXIO); /* No cartridge */
if ((r & QS_FMTOK) == 0) return(ENXIO); /* Not formatted */
if (ftg == NULL || ft->newcart) {
if (ftgetgeom(ftu) < 0) return(ENXIO);
}
tape_cmd(ftu, QC_SEEKTRACK);
tape_cmd(ftu, *trk + 2);
tape_state(ftu, 0, QS_READY, 90);
return(0);
}
/*
* Start tape moving forward.
*/
static int
ftreq_lfwd(ftu_t ftu)
{
ft_p ft = &ft_data[ftu];
tape_inactive(ftu);
tape_cmd(ftu, QC_STOP);
tape_state(ftu, 0, QS_READY, 90);
tape_cmd(ftu, QC_FORWARD);
ft->moving = 1;
return(0);
}
/*
* Stop the tape
*/
static int
ftreq_stop(ftu_t ftu)
{
ft_p ft = &ft_data[ftu];
tape_inactive(ftu);
tape_cmd(ftu, QC_STOP);
tape_state(ftu, 0, QS_READY, 90);
ft->moving = 0;
return(0);
}
/*
* Set the particular mode the drive should be in.
*/
static int
ftreq_setmode(ftu_t ftu, int cmd)
{
int r;
ft_p ft = &ft_data[ftu];
tape_inactive(ftu);
r = tape_status(ftu);
switch(cmd) {
case QIOPRIMARY:
ft->mode = FTM_PRIMARY;
tape_cmd(ftu, QC_PRIMARY);
break;
case QIOFORMAT:
if (r & QS_RDONLY) return(ENXIO);
if ((r & QS_BOT) == 0) return(ENXIO);
tape_cmd(ftu, QC_FORMAT);
break;
case QIOVERIFY:
if ((r & QS_FMTOK) == 0) return(ENXIO); /* Not formatted */
tape_cmd(ftu, QC_VERIFY);
break;
}
tape_state(ftu, 0, QS_READY, 60);
return(0);
}
/*
* Return drive status bits
*/
static int
ftreq_status(ftu_t ftu, int cmd, int *sts, struct proc *p)
{
ft_p ft = &ft_data[ftu];
if (ft->active)
*sts = ft->laststs & ~QS_READY;
else
*sts = tape_status(ftu);
return(0);
}
/*
* Return drive configuration bits
*/
static int
ftreq_config(ftu_t ftu, int cmd, int *cfg, struct proc *p)
{
int r, tries;
ft_p ft = &ft_data[ftu];
if (ft->active)
r = ft->lastcfg;
else {
for (r = -1, tries = 0; r < 0 && tries < 3; tries++)
r = qic_status(ftu, QC_CONFIG, 8);
if (tries == 3) return(ENXIO);
}
*cfg = r;
return(0);
}
/*
* Return current tape's geometry.
*/
static int
ftreq_geom(ftu_t ftu, QIC_Geom *g)
{
tape_inactive(ftu);
if (ftg == NULL && ftgetgeom(ftu) < 0) return(ENXIO);
bcopy(ftg, g, sizeof(QIC_Geom));
return(0);
}
/*
* Return drive hardware information
*/
static int
ftreq_hwinfo(ftu_t ftu, QIC_HWInfo *hwp)
{
int tries;
int rom, vend;
tape_inactive(ftu);
bzero(hwp, sizeof(QIC_HWInfo));
for (rom = -1, tries = 0; rom < 0 && tries < 3; tries++)
rom = qic_status(ftu, QC_VERSION, 8);
if (rom > 0) {
hwp->hw_rombeta = (rom >> 7) & 0x01;
hwp->hw_romid = rom & 0x7f;
}
for (vend = -1, tries = 0; vend < 0 && tries < 3; tries++)
vend = qic_status(ftu, QC_VENDORID, 16);
if (vend > 0) {
hwp->hw_make = (vend >> 6) & 0x3ff;
hwp->hw_model = vend & 0x3f;
}
return(0);
}
/*
* Receive or Send the in-core header segment.
*/
static int
ftreq_hdr(ftu_t ftu, int cmd, QIC_Segment *sp)
{
ft_p ft = &ft_data[ftu];
QIC_Header *h = (QIC_Header *)ft->hdr->buff;
if (sp == NULL || sp->sg_data == NULL) return(EINVAL);
if (cmd == QIOSENDHDR) {
copyin(sp->sg_data, ft->hdr->buff, QCV_SEGSIZE);
} else {
if (h->qh_sig != QCV_HDRMAGIC) return(EIO);
copyout(ft->hdr->buff, sp->sg_data, QCV_SEGSIZE);
}
return(0);
}
/*
* I/O functions.
*/
int
ftioctl(dev_t dev, int cmd, caddr_t data, int flag, struct proc *p)
{
ftu_t ftu = FDUNIT(minor(dev));
switch(cmd) {
case QIOREAD: /* Request reading a segment from tape. */
case QIOWRITE: /* Request writing a segment to tape. */
return(ftreq_rw(ftu, cmd, (QIC_Segment *)data, p));
case QIOREWIND: /* Rewind tape. */
return(ftreq_rewind(ftu));
case QIOBOT: /* Seek to logical beginning of track. */
case QIOEOT: /* Seek to logical end of track. */
return(ftreq_trkpos(ftu, cmd));
case QIOTRACK: /* Seek tape head to specified track. */
return(ftreq_trkset(ftu, (int *)data));
case QIOSEEKLP: /* Seek load point. */
goto badreq;
case QIOFORWARD: /* Move tape in logical forward direction. */
return(ftreq_lfwd(ftu));
case QIOSTOP: /* Causes tape to stop. */
return(ftreq_stop(ftu));
case QIOPRIMARY: /* Enter primary mode. */
case QIOFORMAT: /* Enter format mode. */
case QIOVERIFY: /* Enter verify mode. */
return(ftreq_setmode(ftu, cmd));
case QIOWRREF: /* Write reference burst. */
goto badreq;
case QIOSTATUS: /* Get drive status. */
return(ftreq_status(ftu, cmd, (int *)data, p));
case QIOCONFIG: /* Get tape configuration. */
return(ftreq_config(ftu, cmd, (int *)data, p));
case QIOGEOM:
return(ftreq_geom(ftu, (QIC_Geom *)data));
case QIOHWINFO:
return(ftreq_hwinfo(ftu, (QIC_HWInfo *)data));
case QIOSENDHDR:
case QIORECVHDR:
return(ftreq_hdr(ftu, cmd, (QIC_Segment *)data));
}
badreq:
DPRT(("ft%d: unknown ioctl(%d) request\n", ftu, cmd));
return(ENXIO);
}
/*
* Not implemented
*/
int
ftdump(dev_t dev)
{
return(EINVAL);
}
/*
* Not implemented
*/
int
ftsize(dev_t dev)
{
return(EINVAL);
}
#endif
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