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NetBSD/sys/dev/qbus/ts.c
jdolecek e0cc03a09b merge kqueue branch into -current 
kqueue provides a stateful and efficient event notification framework
currently supported events include socket, file, directory, fifo,
pipe, tty and device changes, and monitoring of processes and signals

kqueue is supported by all writable filesystems in NetBSD tree
(with exception of Coda) and all device drivers supporting poll(2)

based on work done by Jonathan Lemon for FreeBSD
initial NetBSD port done by Luke Mewburn and Jason Thorpe
2002-10-23 09:10:23 +00:00

1077 lines
27 KiB
C
Raw Blame History

/* $NetBSD: ts.c,v 1.10 2002/10/23 09:13:38 jdolecek Exp $ */
/*-
* Copyright (c) 1991 The Regents of the University of California.
* 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 the University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``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 REGENTS OR CONTRIBUTORS 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.
*
* @(#)tmscp.c 7.16 (Berkeley) 5/9/91
*/
/*
* sccsid = "@(#)tmscp.c 1.24 (ULTRIX) 1/21/86";
*/
/************************************************************************
* *
* Licensed from Digital Equipment Corporation *
* Copyright (c) *
* Digital Equipment Corporation *
* Maynard, Massachusetts *
* 1985, 1986 *
* All rights reserved. *
* *
* The Information in this software is subject to change *
* without notice and should not be construed as a commitment *
* by Digital Equipment Corporation. Digital makes no *
* representations about the suitability of this software for *
* any purpose. It is supplied "As Is" without expressed or *
* implied warranty. *
* *
* If the Regents of the University of California or its *
* licensees modify the software in a manner creating *
* derivative copyright rights, appropriate copyright *
* legends may be placed on the derivative work in addition *
* to that set forth above. *
* *
************************************************************************/
/*
* TSV05/TS05 device driver, written by Bertram Barth.
*
* should be TS11 compatible (untested)
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: ts.c,v 1.10 2002/10/23 09:13:38 jdolecek Exp $");
#undef TSDEBUG
/*
* TODO:
*
* Keep track of tape position so that lseek et al works.
* Use tprintf to inform the user, not the system console.
*/
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/buf.h>
#include <sys/conf.h>
#include <sys/errno.h>
#include <sys/file.h>
#include <sys/syslog.h>
#include <sys/ioctl.h>
#include <sys/mtio.h>
#include <sys/uio.h>
#include <sys/proc.h>
#include <machine/bus.h>
#include <dev/qbus/ubareg.h>
#include <dev/qbus/ubavar.h>
#include <dev/qbus/tsreg.h>
#include "ioconf.h"
struct ts {
struct cmd cmd; /* command packet */
struct chr chr; /* characteristics packet */
struct status status; /* status packet */
};
/*
* Software status, per controller.
* also status per tape-unit, since only one unit per controller
* (thus we have no struct ts_info)
*/
struct ts_softc {
struct device sc_dev; /* Autoconf ... */
struct uba_unit sc_unit; /* Struct common for UBA to talk */
struct evcnt sc_intrcnt; /* Interrupt counting */
struct ubinfo sc_ui; /* mapping info for struct ts */
struct uba_unit sc_uu; /* Struct for UBA to communicate */
bus_space_tag_t sc_iot;
bus_addr_t sc_ioh;
bus_dma_tag_t sc_dmat;
bus_dmamap_t sc_dmam;
volatile struct ts *sc_vts; /* Memory address of ts struct */
struct ts *sc_bts; /* Unibus address of ts struct */
int sc_type; /* TS11 or TS05? */
short sc_waddr; /* Value to write to TSDB */
struct bufq_state sc_bufq; /* pending I/O requests */
short sc_mapped; /* Unibus map allocated ? */
short sc_state; /* see below: ST_xxx */
short sc_rtc; /* retry count for lcmd */
short sc_openf; /* lock against multiple opens */
short sc_liowf; /* last operation was write */
struct buf ts_cbuf; /* internal cmd buffer (for ioctls) */
};
#define XNAME sc->sc_dev.dv_xname
#define TS_WCSR(csr, val) \
bus_space_write_2(sc->sc_iot, sc->sc_ioh, csr, val)
#define TS_RCSR(csr) \
bus_space_read_2(sc->sc_iot, sc->sc_ioh, csr)
#define LOWORD(x) ((int)(x) & 0xffff)
#define HIWORD(x) (((int)(x) >> 16) & 0x3f)
#define TYPE_TS11 0
#define TYPE_TS05 1
#define TYPE_TU80 2
#define TS_INVALID 0
#define TS_INIT 1
#define TS_RUNNING 2
#define TS_FASTREPOS 3
static void tsintr(void *);
static void tsinit(struct ts_softc *);
static void tscommand(struct ts_softc *, dev_t, int, int);
static int tsstart(struct ts_softc *, int);
static void tswchar(struct ts_softc *);
static int tsreset(struct ts_softc *);
static int tsmatch(struct device *, struct cfdata *, void *);
static void tsattach(struct device *, struct device *, void *);
static int tsready(struct uba_unit *);
CFATTACH_DECL(ts, sizeof(struct ts_softc),
tsmatch, tsattach, NULL, NULL);
dev_type_open(tsopen);
dev_type_close(tsclose);
dev_type_read(tsread);
dev_type_write(tswrite);
dev_type_ioctl(tsioctl);
dev_type_strategy(tsstrategy);
dev_type_dump(tsdump);
const struct bdevsw ts_bdevsw = {
tsopen, tsclose, tsstrategy, tsioctl, tsdump, nosize, D_TAPE
};
const struct cdevsw ts_cdevsw = {
tsopen, tsclose, tsread, tswrite, tsioctl,
nostop, notty, nopoll, nommap, nokqfilter, D_TAPE
};
/* Bits in minor device */
#define TS_UNIT(dev) (minor(dev)&03)
#define TS_HIDENSITY 010
#define TS_PRI LOG_INFO
/*
* Probe for device. If found, try to raise an interrupt.
*/
int
tsmatch(struct device *parent, struct cfdata *match, void *aux)
{
struct ts_softc ssc;
struct ts_softc *sc = &ssc;
struct uba_attach_args *ua = aux;
int i;
sc->sc_iot = ua->ua_iot;
sc->sc_ioh = ua->ua_ioh;
sc->sc_mapped = 0;
sc->sc_dev.dv_parent = parent;
strcpy(XNAME, "ts");
/* Try to reset the device */
for (i = 0; i < 3; i++)
if (tsreset(sc) == 1)
break;
if (i == 3)
return 0;
tsinit(sc);
tswchar(sc); /* write charact. to enable interrupts */
/* completion of this will raise the intr. */
DELAY(1000000); /* Wait for interrupt */
ubmemfree((void *)parent, &sc->sc_ui);
return 1;
}
/*
*/
void
tsattach(struct device *parent, struct device *self, void *aux)
{
struct uba_softc *uh = (void *)parent;
struct ts_softc *sc = (void *)self;
struct uba_attach_args *ua = aux;
int error;
char *t;
sc->sc_iot = ua->ua_iot;
sc->sc_ioh = ua->ua_ioh;
sc->sc_dmat = ua->ua_dmat;
sc->sc_uu.uu_softc = sc;
sc->sc_uu.uu_ready = tsready;
tsinit(sc); /* reset and map */
if ((error = bus_dmamap_create(sc->sc_dmat, (64*1024), 16, (64*1024),
0, BUS_DMA_NOWAIT, &sc->sc_dmam)))
return printf(": failed create DMA map %d\n", error);
bufq_alloc(&sc->sc_bufq, BUFQ_FCFS);
/*
* write the characteristics (again)
*/
sc->sc_state = TS_INIT; /* tsintr() checks this ... */
tswchar(sc);
if (tsleep(sc, PRIBIO, "tsattach", 100))
return printf(": failed SET CHARACTERISTICS\n");
sc->sc_state = TS_RUNNING;
if (uh->uh_type == UBA_UBA) {
if (sc->sc_vts->status.xst2 & TS_SF_TU80) {
sc->sc_type = TYPE_TU80;
t = "TU80";
} else {
sc->sc_type = TYPE_TS11;
t = "TS11";
}
} else {
sc->sc_type = TYPE_TS05;
t = "TS05";
}
printf("\n%s: %s\n", XNAME, t);
printf("%s: rev %d, extended features %s, transport %s\n",
XNAME, (sc->sc_vts->status.xst2 & TS_SF_MCRL) >> 2,
(sc->sc_vts->status.xst2 & TS_SF_EFES ? "enabled" : "disabled"),
(TS_RCSR(TSSR) & TS_OFL ? "offline" : "online"));
uba_intr_establish(ua->ua_icookie, ua->ua_cvec, tsintr,
sc, &sc->sc_intrcnt);
evcnt_attach_dynamic(&sc->sc_intrcnt, EVCNT_TYPE_INTR, ua->ua_evcnt,
sc->sc_dev.dv_xname, "intr");
}
/*
* Initialize a TS device. Set up UBA mapping registers,
* initialize data structures, what else ???
*/
void
tsinit(struct ts_softc *sc)
{
if (sc->sc_mapped == 0) {
/*
* Map the communications area and command and message
* buffer into Unibus address space.
*/
sc->sc_ui.ui_size = sizeof(struct ts);
if ((ubmemalloc((void *)sc->sc_dev.dv_parent,
&sc->sc_ui, UBA_CANTWAIT)))
return;
sc->sc_vts = (void *)sc->sc_ui.ui_vaddr;
sc->sc_bts = (void *)sc->sc_ui.ui_baddr;
sc->sc_waddr = sc->sc_ui.ui_baddr |
((sc->sc_ui.ui_baddr >> 16) & 3);
sc->sc_mapped = 1;
}
tsreset(sc);
}
/*
* Execute a (ioctl) command on the tape drive a specified number of times.
* This routine sets up a buffer and calls the strategy routine which
* issues the command to the controller.
*/
void
tscommand(struct ts_softc *sc, dev_t dev, int cmd, int count)
{
struct buf *bp;
int s;
#ifdef TSDEBUG
printf("tscommand (%x, %d)\n", cmd, count);
#endif
bp = &sc->ts_cbuf;
s = splbio();
while (bp->b_flags & B_BUSY) {
/*
* This special check is because B_BUSY never
* gets cleared in the non-waiting rewind case. ???
*/
if (bp->b_bcount == 0 && (bp->b_flags & B_DONE))
break;
bp->b_flags |= B_WANTED;
(void) tsleep(bp, PRIBIO, "tscmd", 0);
/* check MOT-flag !!! */
}
bp->b_flags = B_BUSY | B_READ;
splx(s);
/*
* Load the buffer. The b_count field gets used to hold the command
* count. the b_resid field gets used to hold the command mneumonic.
* These 2 fields are "known" to be "safe" to use for this purpose.
* (Most other drivers also use these fields in this way.)
*/
bp->b_dev = dev;
bp->b_bcount = count;
bp->b_resid = cmd;
bp->b_blkno = 0;
tsstrategy(bp);
/*
* In case of rewind from close, don't wait.
* This is the only case where count can be 0.
*/
if (count == 0)
return;
biowait(bp);
if (bp->b_flags & B_WANTED)
wakeup((caddr_t)bp);
bp->b_flags &= B_ERROR;
}
/*
* Start an I/O operation on TS05 controller
*/
int
tsstart(struct ts_softc *sc, int isloaded)
{
struct buf *bp;
int cmd;
if (TAILQ_EMPTY(&sc->sc_bufq.bq_head))
return 0;
bp = BUFQ_PEEK(&sc->sc_bufq);
#ifdef TSDEBUG
printf("buf: %p bcount %ld blkno %d\n", bp, bp->b_bcount, bp->b_blkno);
#endif
/*
* Check if command is an ioctl or not (ie. read or write).
* If it's an ioctl then just set the flags for later use;
* For other commands attempt to setup a buffer pointer.
*/
if (bp == &sc->ts_cbuf) {
switch ((int)bp->b_resid) {
case MTWEOF:
cmd = TS_CMD_WTM;
break;
case MTFSF:
cmd = TS_CMD_STMF;
sc->sc_vts->cmd.cw1 = bp->b_bcount;
break;
case MTBSF:
cmd = TS_CMD_STMR;
sc->sc_vts->cmd.cw1 = bp->b_bcount;
break;
case MTFSR:
cmd = TS_CMD_SRF;
sc->sc_vts->cmd.cw1 = bp->b_bcount;
break;
case MTBSR:
cmd = TS_CMD_SRR;
sc->sc_vts->cmd.cw1 = bp->b_bcount;
break;
case MTREW:
cmd = TS_CMD_RWND;
break;
case MTOFFL:
cmd = TS_CMD_RWUL;
break;
case MTNOP:
cmd = TS_CMD_STAT;
break;
default:
printf ("%s: bad ioctl %d\n", sc->sc_dev.dv_xname,
(int)bp->b_resid);
/* Need a no-op. get status */
cmd = TS_CMD_STAT;
} /* end switch (bp->b_resid) */
} else {
if (isloaded == 0) {
/*
* now we try to map the buffer into uba map space (???)
*/
if (bus_dmamap_load(sc->sc_dmat, sc->sc_dmam,
bp->b_data,
bp->b_bcount, bp->b_proc, BUS_DMA_NOWAIT)) {
uba_enqueue(&sc->sc_uu);
return 0;
}
sc->sc_rtc = 0;
}
sc->sc_vts->cmd.cw1 = LOWORD(sc->sc_dmam->dm_segs[0].ds_addr);
sc->sc_vts->cmd.cw2 = HIWORD(sc->sc_dmam->dm_segs[0].ds_addr);
sc->sc_vts->cmd.cw3 = bp->b_bcount;
bp->b_error = 0; /* Used for error count */
#ifdef TSDEBUG
printf("tsstart-1: err %d\n", bp->b_error);
#endif
if (bp->b_flags & B_READ)
cmd = TS_CMD_RNF;
else
cmd = TS_CMD_WD;
}
/*
* Now that the command-buffer is setup, give it to the controller
*/
sc->sc_vts->cmd.cmdr = TS_CF_ACK | TS_CF_IE | cmd;
#ifdef TSDEBUG
printf("tsstart: sending cmdr %x\n", sc->sc_vts->cmd.cmdr);
#endif
TS_WCSR(TSDB, sc->sc_waddr);
}
/*
* Called when there are free uba resources.
*/
int
tsready(struct uba_unit *uu)
{
struct ts_softc *sc = uu->uu_softc;
struct buf *bp = BUFQ_PEEK(&sc->sc_bufq);
if (bus_dmamap_load(sc->sc_dmat, sc->sc_dmam, bp->b_data,
bp->b_bcount, bp->b_proc, BUS_DMA_NOWAIT))
return 0;
tsstart(sc, 1);
return 1;
}
/*
* initialize the controller by sending WRITE CHARACTERISTICS command.
* contents of command- and message-buffer are assembled during this
* function.
*/
void
tswchar(struct ts_softc *sc)
{
/*
* assemble and send "WRITE CHARACTERISTICS" command
*/
sc->sc_vts->cmd.cmdr = TS_CF_ACK | TS_CF_IE | TS_CMD_WCHAR;
sc->sc_vts->cmd.cw1 = LOWORD(&sc->sc_bts->chr);
sc->sc_vts->cmd.cw2 = HIWORD(&sc->sc_bts->chr);
sc->sc_vts->cmd.cw3 = 010; /* size of charact.-data */
sc->sc_vts->chr.sadrl = LOWORD(&sc->sc_bts->status);
sc->sc_vts->chr.sadrh = HIWORD(&sc->sc_bts->status);
sc->sc_vts->chr.onesix = (sc->sc_type == TYPE_TS05 ? 020 : 016);
sc->sc_vts->chr.chrw = TS_WC_ESS;
sc->sc_vts->chr.xchrw = TS_WCX_HSP|TS_WCX_RBUF|TS_WCX_WBUF;
TS_WCSR(TSDB, sc->sc_waddr);
}
/*
* Reset the TS11. Return 1 if failed, 0 if succeeded.
*/
int
tsreset(struct ts_softc *sc)
{
int timeout;
/*
* reset ctlr by writing into TSSR, then write characteristics
*/
timeout = 0; /* timeout in 10 seconds */
TS_WCSR(TSSR, 0); /* start initialization */
while ((TS_RCSR(TSSR) & TS_SSR) == 0) {
DELAY(10000);
if (timeout++ > 1000)
return 0;
}
return 1;
}
static void
prtstat(struct ts_softc *sc, int sr)
{
char buf[100];
bitmask_snprintf(sr, TS_TSSR_BITS, buf, sizeof(buf));
printf("%s: TSSR=%s\n", XNAME, buf);
bitmask_snprintf(sc->sc_vts->status.xst0,TS_XST0_BITS,buf,sizeof(buf));
printf("%s: XST0=%s\n", XNAME, buf);
}
/*
* TSV05/TS05 interrupt routine
*/
static void
tsintr(void *arg)
{
struct ts_softc *sc = arg;
struct buf *bp;
unsigned short sr = TS_RCSR(TSSR); /* save TSSR */
unsigned short mh = sc->sc_vts->status.hdr; /* and msg-header */
/* clear the message header ??? */
short ccode = sc->sc_vts->cmd.cmdr & TS_CF_CCODE;
#ifdef TSDEBUG
{
char buf[100];
bitmask_snprintf(sr, TS_TSSR_BITS, buf, sizeof(buf));
printf("tsintr: sr %x mh %x\n", sr, mh);
printf("srbits: %s\n", buf);
}
#endif
/*
* There are two different things which can (and should) be checked:
* the actual (internal) state and the device's result (tssr/msg.hdr)
*
* For each state there's only one "normal" interrupt. Anything else
* has to be checked more intensively. Thus in a first run according
* to the internal state the expected interrupt is checked/handled.
*
* In a second run the remaining (not yet handled) interrupts are
* checked according to the drive's result.
*/
switch (sc->sc_state) {
case TS_INVALID:
/*
* Ignore unsolicited interrupts.
*/
log(LOG_WARNING, "%s: stray intr [%x,%x]\n",
sc->sc_dev.dv_xname, sr, mh);
return;
case TS_INIT:
/*
* Init phase ready.
*/
wakeup(sc);
return;
case TS_RUNNING:
case TS_FASTREPOS:
/*
* Here we expect interrupts indicating the end of
* commands or indicating problems.
*/
/*
* Anything else is handled outside this switch ...
*/
break;
default:
printf ("%s: unexpected interrupt during state %d [%x,%x]\n",
sc->sc_dev.dv_xname, sc->sc_state, sr, mh);
return;
}
/*
* now we check the termination class.
*/
switch (sr & TS_TC) {
case TS_TC_NORM:
/*
* Normal termination -- The operation is completed
* witout incident.
*/
if (sc->sc_state == TS_FASTREPOS) {
#ifdef TSDEBUG
printf("Fast repos interrupt\n");
#endif
/* Fast repos succeeded, start normal data xfer */
sc->sc_state = TS_RUNNING;
tsstart(sc, 1);
return;
}
sc->sc_liowf = (ccode == TS_CC_WRITE);
break;
case TS_TC_ATTN:
/*
* Attention condition -- this code indicates that the
* drive has undergone a status change, such as going
* off-line or coming on-line.
* (Without EAI enabled, no Attention interrupts occur.
* drive status changes are signaled by the VCK flag.)
*/
return;
case TS_TC_TSA:
/*
* Tape Status Alert -- A status condition is encountered
* that may have significance to the program. Bits of
* interest in the extended status registers include
* TMK, EOT and RLL.
*/
#ifdef TSDEBUG
{
char buf[100];
bitmask_snprintf(sc->sc_vts->status.xst0,
TS_XST0_BITS, buf, sizeof(buf));
printf("TSA: sr %x bits %s\n",
sc->sc_vts->status.xst0, buf);
}
#endif
if (sc->sc_vts->status.xst0 & TS_SF_TMK) {
/* Read to end-of-file. No error. */
break;
}
if (sc->sc_vts->status.xst0 & TS_SF_EOT) {
/* End of tape. Bad. */
#ifdef TSDEBUG
printf("TS_TC_TSA: EOT\n");
#endif
bp->b_flags |= B_ERROR;
bp->b_error = EIO;
break;
}
if (sc->sc_vts->status.xst0 & TS_SF_RLS)
break;
if (sc->sc_vts->status.xst0 & TS_SF_TMK) {
#ifdef TSDEBUG
printf(("Tape Mark detected"));
#endif
}
if (sc->sc_vts->status.xst0 & TS_SF_EOT) {
#ifdef TSDEBUG
printf(("End of Tape"));
#endif
}
#ifndef TSDEBUG
{
char buf[100];
bitmask_snprintf(sc->sc_vts->status.xst0,
TS_XST0_BITS, buf, sizeof(buf));
printf("TSA: sr %x bits %s\n",
sc->sc_vts->status.xst0, buf);
}
#endif
break;
case TS_TC_FR:
/*
* Function Reject -- The specified function was not
* initiated. Bits of interest include OFL, VCK, BOT,
* WLE, ILC and ILA.
*/
if (sr & TS_OFL)
printf("tape is off-line.\n");
#ifdef TSDEBUG
{
char buf[100];
bitmask_snprintf(sc->sc_vts->status.xst0,
TS_XST0_BITS, buf, sizeof(buf));
printf("FR: sr %x bits %s\n",
sc->sc_vts->status.xst0, buf);
}
#endif
if (sc->sc_vts->status.xst0 & TS_SF_VCK)
printf("Volume check\n");
if (sc->sc_vts->status.xst0 & TS_SF_BOT)
printf("Start of tape.\n");
if (sc->sc_vts->status.xst0 & TS_SF_WLE)
printf("Write Lock Error\n");
if (sc->sc_vts->status.xst0 & TS_SF_EOT)
printf("End of tape.\n");
break;
case TS_TC_TPD:
/*
* Recoverable Error -- Tape position is a record beyond
* what its position was when the function was initiated.
* Suggested recovery procedure is to log the error and
* issue the appropriate retry command.
*
* Do a fast repositioning one record back.
*/
sc->sc_state = TS_FASTREPOS;
#ifdef TSDEBUG
printf("TS_TC_TPD: errcnt %d\n", sc->sc_rtc);
#endif
if (sc->sc_rtc++ == 8) {
printf("%s: failed 8 retries\n", XNAME);
prtstat(sc, sr);
bp->b_flags |= B_ERROR;
bp->b_error = EIO;
break;
}
sc->sc_vts->cmd.cmdr = TS_CF_ACK | TS_CF_IE | TS_CMD_SRR;
sc->sc_vts->cmd.cw1 = 1;
TS_WCSR(TSDB, sc->sc_waddr);
return;
break;
case TS_TC_TNM:
/*
* Recoverable Error -- Tape position has not changed.
* Suggested recovery procedure is to log the error and
* reissue the original command.
*/
if (sc->sc_rtc++ == 8) {
printf("%s: failed 8 retries\n", XNAME);
prtstat(sc, sr);
bp->b_flags |= B_ERROR;
bp->b_error = EIO;
break;
}
tsstart(sc, 1);
return;
case TS_TC_TPL:
/*
* Unrecoverable Error -- Tape position has been lost.
* No valid recovery procedures exist unless the tape
* has labels or sequence numbers.
*/
printf("Tape position lost\n");
bp->b_flags |= B_ERROR;
bp->b_error = EIO;
break;
case TS_TC_FCE:
/*
* Fatal subsytem Error -- The subsytem is incapable
* of properly performing commands, or at least its
* integrity is seriously questionable. Refer to the
* fatal class code field in the TSSR register for
* additional information on the type of fatal error.
*/
printf ("Fatal Controller Error\n");
prtstat(sc, sr);
break;
default:
printf ("%s: error 0x%x, resetting controller\n",
sc->sc_dev.dv_xname, sr & TS_TC);
tsreset(sc);
}
if ((bp = BUFQ_GET(&sc->sc_bufq)) != NULL) {
#ifdef TSDEBUG
printf("tsintr2: que %p\n", TAILQ_FIRST(&sc->sc_bufq.bq_head));
#endif
if (bp != &sc->ts_cbuf) { /* no ioctl */
bus_dmamap_unload(sc->sc_dmat, sc->sc_dmam);
uba_done((void *)sc->sc_dev.dv_parent);
}
bp->b_resid = sc->sc_vts->status.rbpcr;
if ((bp->b_flags & B_ERROR) == 0)
bp->b_error = 0;
biodone (bp);
}
tsstart(sc, 0);
}
/*
* Open a ts device and set the unit online. If the controller is not
* in the run state, call init to initialize the ts controller first.
*/
int
tsopen(dev_t dev, int flag, int type, struct proc *p)
{
struct ts_softc *sc;
int unit = TS_UNIT(dev);
if (unit >= ts_cd.cd_ndevs)
return ENXIO;
sc = ts_cd.cd_devs[unit];
if (sc == 0)
return ENXIO;
if (sc->sc_state < TS_RUNNING)
return ENXIO;
if (sc->sc_openf)
return EBUSY;
sc->sc_openf = 1;
/*
* check if transport is really online.
* (without attention-interrupts enabled, we really don't know
* the actual state of the transport. Thus we call get-status
* (ie. MTNOP) once and check the actual status.)
*/
if (TS_RCSR(TSSR) & TS_OFL) {
uprintf("%s: transport is offline.\n", XNAME);
sc->sc_openf = 0;
return EIO; /* transport is offline */
}
tscommand(sc, dev, MTNOP, 1);
if ((flag & FWRITE) && (sc->sc_vts->status.xst0 & TS_SF_WLK)) {
uprintf("%s: no write ring.\n", XNAME);
sc->sc_openf = 0;
return EROFS;
}
if (sc->sc_vts->status.xst0 & TS_SF_VCK) {
sc->sc_vts->cmd.cmdr = TS_CF_CVC|TS_CF_ACK;
TS_WCSR(TSDB, sc->sc_waddr);
}
tscommand(sc, dev, MTNOP, 1);
#ifdef TSDEBUG
{
char buf[100];
bitmask_snprintf(sc->sc_vts->status.xst0,
TS_XST0_BITS, buf, sizeof(buf));
printf("tsopen: xst0 %s\n", buf);
}
#endif
sc->sc_liowf = 0;
return 0;
}
/*
* Close tape device.
*
* If tape was open for writing or last operation was
* a write, then write two EOF's and backspace over the last one.
* Unless this is a non-rewinding special file, rewind the tape.
*
* Make the tape available to others, by clearing openf flag.
*/
int
tsclose(dev_t dev, int flag, int type, struct proc *p)
{
struct ts_softc *sc = ts_cd.cd_devs[TS_UNIT(dev)];
if (flag == FWRITE || ((flag & FWRITE) && sc->sc_liowf)) {
/*
* We are writing two tape marks (EOT), but place the tape
* before the second one, so that another write operation
* will overwrite the second one and leave and EOF-mark.
*/
tscommand(sc, dev, MTWEOF, 1); /* Write Tape Mark */
tscommand(sc, dev, MTWEOF, 1); /* Write Tape Mark */
tscommand(sc, dev, MTBSF, 1); /* Skip Tape Marks Reverse */
}
if ((dev & T_NOREWIND) == 0)
tscommand(sc, dev, MTREW, 0);
sc->sc_openf = 0;
sc->sc_liowf = 0;
return 0;
}
/*
* Manage buffers and perform block mode read and write operations.
*/
void
tsstrategy(struct buf *bp)
{
register int unit = TS_UNIT(bp->b_dev);
struct ts_softc *sc = (void *)ts_cd.cd_devs[unit];
int s, empty;
#ifdef TSDEBUG
printf("buf: %p bcount %ld blkno %d\n", bp, bp->b_bcount, bp->b_blkno);
#endif
s = splbio ();
empty = (BUFQ_PEEK(&sc->sc_bufq) == NULL);
BUFQ_PUT(&sc->sc_bufq, bp);
if (empty)
tsstart(sc, 0);
splx(s);
}
/*
* Catch ioctl commands, and call the "command" routine to do them.
*/
int
tsioctl(dev, cmd, data, flag, p)
dev_t dev;
u_long cmd;
caddr_t data;
int flag;
struct proc *p;
{
struct buf *bp;
struct ts_softc *sc;
struct mtop *mtop; /* mag tape cmd op to perform */
struct mtget *mtget; /* mag tape struct to get info in */
int callcount; /* number of times to call routine */
int scount; /* number of files/records to space */
int spaceop = 0; /* flag for skip/space operation */
int error = 0;
#ifdef TSDEBUG
printf("tsioctl (%x, %lx, %p, %d)\n", dev, cmd, data, flag);
#endif
sc = ts_cd.cd_devs[TS_UNIT(dev)];
bp = &sc->ts_cbuf;
switch (cmd) {
case MTIOCTOP: /* do a mag tape op */
mtop = (struct mtop *)data;
switch (mtop->mt_op) {
case MTWEOF: /* write an end-of-file record */
callcount = mtop->mt_count;
scount = 1;
break;
case MTFSR: /* forward space record */
case MTBSR: /* backward space record */
spaceop = 1;
case MTFSF: /* forward space file */
case MTBSF: /* backward space file */
callcount = 1;
scount = mtop->mt_count;
break;
case MTREW: /* rewind */
case MTOFFL: /* rewind and put the drive offline */
case MTNOP: /* no operation, sets status only */
callcount = 1;
scount = 1; /* wait for this rewind */
break;
case MTRETEN: /* retension */
case MTERASE: /* erase entire tape */
case MTEOM: /* forward to end of media */
case MTNBSF: /* backward space to begin of file */
case MTCACHE: /* enable controller cache */
case MTNOCACHE: /* disable controller cache */
case MTSETBSIZ: /* set block size; 0 for variable */
case MTSETDNSTY: /* set density code for current mode */
printf("ioctl %d not implemented.\n", mtop->mt_op);
return (ENXIO);
default:
#ifdef TSDEBUG
printf("invalid ioctl %d\n", mtop->mt_op);
#endif
return (ENXIO);
} /* switch (mtop->mt_op) */
if (callcount <= 0 || scount <= 0) {
#ifdef TSDEBUG
printf("invalid values %d/%d\n", callcount, scount);
#endif
return (EINVAL);
}
do {
tscommand(sc, dev, mtop->mt_op, scount);
if (spaceop && bp->b_resid) {
#ifdef TSDEBUG
printf(("spaceop didn't complete\n"));
#endif
return (EIO);
}
if (bp->b_flags & B_ERROR) {
#ifdef TSDEBUG
printf("error in ioctl %d\n", mtop->mt_op);
#endif
break;
}
} while (--callcount > 0);
if (bp->b_flags & B_ERROR)
if ((error = bp->b_error) == 0)
return (EIO);
return (error);
case MTIOCGET: /* get tape status */
mtget = (struct mtget *)data;
mtget->mt_type = MT_ISTS;
mtget->mt_dsreg = TS_RCSR(TSSR);
mtget->mt_erreg = sc->sc_vts->status.xst0;
mtget->mt_resid = 0; /* ??? */
mtget->mt_density = 0; /* ??? */
break;
case MTIOCIEOT: /* ignore EOT error */
#ifdef TSDEBUG
printf(("MTIOCIEOT not implemented.\n"));
#endif
return (ENXIO);
case MTIOCEEOT: /* enable EOT error */
#ifdef TSDEBUG
printf(("MTIOCEEOT not implemented.\n"));
#endif
return (ENXIO);
default:
#ifdef TSDEBUG
printf("invalid ioctl cmd 0x%lx\n", cmd);
#endif
return (ENXIO);
}
return (0);
}
/*
*
*/
int
tsread(dev_t dev, struct uio *uio, int flag)
{
return (physio (tsstrategy, NULL, dev, B_READ, minphys, uio));
}
/*
*
*/
int
tswrite(dev_t dev, struct uio *uio, int flag)
{
return (physio (tsstrategy, NULL, dev, B_WRITE, minphys, uio));
}
/*
*
*/
int
tsdump(dev, blkno, va, size)
dev_t dev;
daddr_t blkno;
caddr_t va;
size_t size;
{
return EIO;
}
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