/* $NetBSD: ts.c,v 1.5 2002/09/06 13:18:43 gehenna 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 __KERNEL_RCSID(0, "$NetBSD: ts.c,v 1.5 2002/09/06 13:18:43 gehenna 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 #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #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 *); struct cfattach ts_ca = { sizeof(struct ts_softc), tsmatch, tsattach }; 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, 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; }