/* $OpenBSD: ch.c,v 1.37 2009/01/10 21:36:49 beck Exp $ */ /* $NetBSD: ch.c,v 1.26 1997/02/21 22:06:52 thorpej Exp $ */ /* * Copyright (c) 1996, 1997 Jason R. Thorpe * All rights reserved. * * Partially based on an autochanger driver written by Stefan Grefen * and on an autochanger driver written by the Systems Programming Group * at the University of Utah Computer Science Department. * * 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 acknowledgements: * This product includes software developed by Jason R. Thorpe * for And Communications, http://www.and.com/ * 4. The name of the author may not be used to endorse or promote products * derived from this software without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #define CHRETRIES 2 #define CHUNIT(x) (minor((x))) struct ch_softc { struct device sc_dev; /* generic device info */ struct scsi_link *sc_link; /* link in the SCSI bus */ int sc_picker; /* current picker */ /* * The following information is obtained from the * element address assignment page. */ int sc_firsts[4]; /* firsts, indexed by CHET_* */ int sc_counts[4]; /* counts, indexed by CHET_* */ /* * The following mask defines the legal combinations * of elements for the MOVE MEDIUM command. */ u_int8_t sc_movemask[4]; /* * As above, but for EXCHANGE MEDIUM. */ u_int8_t sc_exchangemask[4]; int flags; /* misc. info */ /* * Quirks; see below. */ int sc_settledelay; /* delay for settle */ }; /* sc_flags */ #define CHF_ROTATE 0x01 /* picker can rotate */ /* Autoconfiguration glue */ int chmatch(struct device *, void *, void *); void chattach(struct device *, struct device *, void *); struct cfattach ch_ca = { sizeof(struct ch_softc), chmatch, chattach }; struct cfdriver ch_cd = { NULL, "ch", DV_DULL }; const struct scsi_inquiry_pattern ch_patterns[] = { {T_CHANGER, T_REMOV, "", "", ""}, }; int ch_move(struct ch_softc *, struct changer_move *); int ch_exchange(struct ch_softc *, struct changer_exchange *); int ch_position(struct ch_softc *, struct changer_position *); int ch_usergetelemstatus(struct ch_softc *, struct changer_element_status_request *); int ch_getelemstatus(struct ch_softc *, int, int, caddr_t, size_t, int); int ch_get_params(struct ch_softc *, int); int ch_interpret_sense(struct scsi_xfer *xs); void ch_get_quirks(struct ch_softc *, struct scsi_inquiry_data *); /* SCSI glue */ struct scsi_device ch_switch = { ch_interpret_sense, NULL, NULL, NULL }; /* * SCSI changer quirks. */ struct chquirk { struct scsi_inquiry_pattern cq_match; /* device id pattern */ int cq_settledelay; /* settle delay, in seconds */ }; struct chquirk chquirks[] = { {{T_CHANGER, T_REMOV, "SPECTRA", "9000", "0200"}, 75}, }; int chmatch(parent, match, aux) struct device *parent; void *match, *aux; { struct scsi_attach_args *sa = aux; int priority; (void)scsi_inqmatch(sa->sa_inqbuf, ch_patterns, sizeof(ch_patterns)/sizeof(ch_patterns[0]), sizeof(ch_patterns[0]), &priority); return (priority); } void chattach(parent, self, aux) struct device *parent, *self; void *aux; { struct ch_softc *sc = (struct ch_softc *)self; struct scsi_attach_args *sa = aux; struct scsi_link *link = sa->sa_sc_link; /* Glue into the SCSI bus */ sc->sc_link = link; link->device = &ch_switch; link->device_softc = sc; link->openings = 1; printf("\n"); /* * Store our our device's quirks. */ ch_get_quirks(sc, sa->sa_inqbuf); } int chopen(dev, flags, fmt, p) dev_t dev; int flags, fmt; struct proc *p; { struct ch_softc *sc; int oldcounts[4]; int i, unit, error = 0; unit = CHUNIT(dev); if ((unit >= ch_cd.cd_ndevs) || ((sc = ch_cd.cd_devs[unit]) == NULL)) return (ENXIO); /* * Only allow one open at a time. */ if (sc->sc_link->flags & SDEV_OPEN) return (EBUSY); sc->sc_link->flags |= SDEV_OPEN; /* * Absorb any unit attention errors. We must notice * "Not ready" errors as a changer will report "In the * process of getting ready" any time it must rescan * itself to determine the state of the changer. */ error = scsi_test_unit_ready(sc->sc_link, TEST_READY_RETRIES, SCSI_IGNORE_ILLEGAL_REQUEST | SCSI_IGNORE_MEDIA_CHANGE); if (error) goto bad; /* * Get information about the device. Save old information * so we can decide whether to be verbose about new parameters. */ for (i = 0; i < 4; i++) { oldcounts[i] = sc->sc_counts[i]; } error = ch_get_params(sc, scsi_autoconf); if (error) goto bad; for (i = 0; i < 4; i++) { if (oldcounts[i] != sc->sc_counts[i]) { break; } } if (i < 4) { #ifdef CHANGER_DEBUG #define PLURAL(c) (c) == 1 ? "" : "s" printf("%s: %d slot%s, %d drive%s, %d picker%s, %d portal%s\n", sc->sc_dev.dv_xname, sc->sc_counts[CHET_ST], PLURAL(sc->sc_counts[CHET_ST]), sc->sc_counts[CHET_DT], PLURAL(sc->sc_counts[CHET_DT]), sc->sc_counts[CHET_MT], PLURAL(sc->sc_counts[CHET_MT]), sc->sc_counts[CHET_IE], PLURAL(sc->sc_counts[CHET_IE])); #undef PLURAL printf("%s: move mask: 0x%x 0x%x 0x%x 0x%x\n", sc->sc_dev.dv_xname, sc->sc_movemask[CHET_MT], sc->sc_movemask[CHET_ST], sc->sc_movemask[CHET_IE], sc->sc_movemask[CHET_DT]); printf("%s: exchange mask: 0x%x 0x%x 0x%x 0x%x\n", sc->sc_dev.dv_xname, sc->sc_exchangemask[CHET_MT], sc->sc_exchangemask[CHET_ST], sc->sc_exchangemask[CHET_IE], sc->sc_exchangemask[CHET_DT]); #endif /* CHANGER_DEBUG */ } /* Default the current picker. */ sc->sc_picker = sc->sc_firsts[CHET_MT]; return (0); bad: sc->sc_link->flags &= ~SDEV_OPEN; return (error); } int chclose(dev, flags, fmt, p) dev_t dev; int flags, fmt; struct proc *p; { struct ch_softc *sc = ch_cd.cd_devs[CHUNIT(dev)]; sc->sc_link->flags &= ~SDEV_OPEN; return (0); } int chioctl(dev, cmd, data, flags, p) dev_t dev; u_long cmd; caddr_t data; int flags; struct proc *p; { struct ch_softc *sc = ch_cd.cd_devs[CHUNIT(dev)]; int error = 0; /* * If this command can change the device's state, we must * have the device open for writing. */ switch (cmd) { case CHIOGPICKER: case CHIOGPARAMS: case CHIOGSTATUS: break; default: if ((flags & FWRITE) == 0) return (EBADF); } switch (cmd) { case CHIOMOVE: error = ch_move(sc, (struct changer_move *)data); break; case CHIOEXCHANGE: error = ch_exchange(sc, (struct changer_exchange *)data); break; case CHIOPOSITION: error = ch_position(sc, (struct changer_position *)data); break; case CHIOGPICKER: *(int *)data = sc->sc_picker - sc->sc_firsts[CHET_MT]; break; case CHIOSPICKER: { int new_picker = *(int *)data; if (new_picker > (sc->sc_counts[CHET_MT] - 1)) return (EINVAL); sc->sc_picker = sc->sc_firsts[CHET_MT] + new_picker; break; } case CHIOGPARAMS: { struct changer_params *cp = (struct changer_params *)data; cp->cp_curpicker = sc->sc_picker - sc->sc_firsts[CHET_MT]; cp->cp_npickers = sc->sc_counts[CHET_MT]; cp->cp_nslots = sc->sc_counts[CHET_ST]; cp->cp_nportals = sc->sc_counts[CHET_IE]; cp->cp_ndrives = sc->sc_counts[CHET_DT]; break; } case CHIOGSTATUS: { struct changer_element_status_request *cesr = (struct changer_element_status_request *)data; error = ch_usergetelemstatus(sc, cesr); break; } /* Implement prevent/allow? */ default: error = scsi_do_ioctl(sc->sc_link, dev, cmd, data, flags, p); break; } return (error); } int ch_move(sc, cm) struct ch_softc *sc; struct changer_move *cm; { struct scsi_move_medium cmd; u_int16_t fromelem, toelem; /* * Check arguments. */ if ((cm->cm_fromtype > CHET_DT) || (cm->cm_totype > CHET_DT)) return (EINVAL); if ((cm->cm_fromunit > (sc->sc_counts[cm->cm_fromtype] - 1)) || (cm->cm_tounit > (sc->sc_counts[cm->cm_totype] - 1))) return (ENODEV); /* * Check the request against the changer's capabilities. */ if ((sc->sc_movemask[cm->cm_fromtype] & (1 << cm->cm_totype)) == 0) return (EINVAL); /* * Calculate the source and destination elements. */ fromelem = sc->sc_firsts[cm->cm_fromtype] + cm->cm_fromunit; toelem = sc->sc_firsts[cm->cm_totype] + cm->cm_tounit; /* * Build the SCSI command. */ bzero(&cmd, sizeof(cmd)); cmd.opcode = MOVE_MEDIUM; _lto2b(sc->sc_picker, cmd.tea); _lto2b(fromelem, cmd.src); _lto2b(toelem, cmd.dst); if (cm->cm_flags & CM_INVERT) cmd.flags |= MOVE_MEDIUM_INVERT; /* * Send command to changer. */ return (scsi_scsi_cmd(sc->sc_link, (struct scsi_generic *)&cmd, sizeof(cmd), NULL, 0, CHRETRIES, 100000, NULL, 0)); } int ch_exchange(sc, ce) struct ch_softc *sc; struct changer_exchange *ce; { struct scsi_exchange_medium cmd; u_int16_t src, dst1, dst2; /* * Check arguments. */ if ((ce->ce_srctype > CHET_DT) || (ce->ce_fdsttype > CHET_DT) || (ce->ce_sdsttype > CHET_DT)) return (EINVAL); if ((ce->ce_srcunit > (sc->sc_counts[ce->ce_srctype] - 1)) || (ce->ce_fdstunit > (sc->sc_counts[ce->ce_fdsttype] - 1)) || (ce->ce_sdstunit > (sc->sc_counts[ce->ce_sdsttype] - 1))) return (ENODEV); /* * Check the request against the changer's capabilities. */ if (((sc->sc_exchangemask[ce->ce_srctype] & (1 << ce->ce_fdsttype)) == 0) || ((sc->sc_exchangemask[ce->ce_fdsttype] & (1 << ce->ce_sdsttype)) == 0)) return (EINVAL); /* * Calculate the source and destination elements. */ src = sc->sc_firsts[ce->ce_srctype] + ce->ce_srcunit; dst1 = sc->sc_firsts[ce->ce_fdsttype] + ce->ce_fdstunit; dst2 = sc->sc_firsts[ce->ce_sdsttype] + ce->ce_sdstunit; /* * Build the SCSI command. */ bzero(&cmd, sizeof(cmd)); cmd.opcode = EXCHANGE_MEDIUM; _lto2b(sc->sc_picker, cmd.tea); _lto2b(src, cmd.src); _lto2b(dst1, cmd.fdst); _lto2b(dst2, cmd.sdst); if (ce->ce_flags & CE_INVERT1) cmd.flags |= EXCHANGE_MEDIUM_INV1; if (ce->ce_flags & CE_INVERT2) cmd.flags |= EXCHANGE_MEDIUM_INV2; /* * Send command to changer. */ return (scsi_scsi_cmd(sc->sc_link, (struct scsi_generic *)&cmd, sizeof(cmd), NULL, 0, CHRETRIES, 100000, NULL, 0)); } int ch_position(sc, cp) struct ch_softc *sc; struct changer_position *cp; { struct scsi_position_to_element cmd; u_int16_t dst; /* * Check arguments. */ if (cp->cp_type > CHET_DT) return (EINVAL); if (cp->cp_unit > (sc->sc_counts[cp->cp_type] - 1)) return (ENODEV); /* * Calculate the destination element. */ dst = sc->sc_firsts[cp->cp_type] + cp->cp_unit; /* * Build the SCSI command. */ bzero(&cmd, sizeof(cmd)); cmd.opcode = POSITION_TO_ELEMENT; _lto2b(sc->sc_picker, cmd.tea); _lto2b(dst, cmd.dst); if (cp->cp_flags & CP_INVERT) cmd.flags |= POSITION_TO_ELEMENT_INVERT; /* * Send command to changer. */ return (scsi_scsi_cmd(sc->sc_link, (struct scsi_generic *)&cmd, sizeof(cmd), NULL, 0, CHRETRIES, 100000, NULL, 0)); } /* * Copy a volume tag to a volume_tag struct, converting SCSI byte order * to host native byte order in the volume serial number. The volume * label as returned by the changer is transferred to user mode as * nul-terminated string. Volume labels are truncated at the first * space, as suggested by SCSI-2. */ static void copy_voltag(struct changer_voltag *uvoltag, struct volume_tag *voltag) { int i; for (i=0; ivif[i]; if (c && c != ' ') uvoltag->cv_volid[i] = c; else break; } uvoltag->cv_volid[i] = '\0'; uvoltag->cv_serial = _2btol(voltag->vsn); } /* * Copy an an element status descriptor to a user-mode * changer_element_status structure. */ static void copy_element_status(int flags, struct read_element_status_descriptor *desc, struct changer_element_status *ces) { ces->ces_flags = desc->flags1; if (flags & READ_ELEMENT_STATUS_PVOLTAG) copy_voltag(&ces->ces_pvoltag, &desc->pvoltag); if (flags & READ_ELEMENT_STATUS_AVOLTAG) copy_voltag(&ces->ces_avoltag, &desc->avoltag); } /* * Perform a READ ELEMENT STATUS on behalf of the user, and return to * the user only the data the user is interested in (i.e. an array of * changer_element_status structures) */ int ch_usergetelemstatus(sc, cesr) struct ch_softc *sc; struct changer_element_status_request *cesr; { struct changer_element_status *user_data = NULL; struct read_element_status_header *st_hdr; struct read_element_status_page_header *pg_hdr; caddr_t desc; caddr_t data = NULL; size_t size, desclen, udsize; int chet = cesr->cesr_type; int avail, i, error = 0; int want_voltags = (cesr->cesr_flags & CESR_VOLTAGS) ? 1 : 0; /* * If there are no elements of the requested type in the changer, * the request is invalid. */ if (sc->sc_counts[chet] == 0) return (EINVAL); /* * Request one descriptor for the given element type. This * is used to determine the size of the descriptor so that * we can allocate enough storage for all of them. We assume * that the first one can fit into 1k. */ data = malloc(1024, M_DEVBUF, M_WAITOK); error = ch_getelemstatus(sc, sc->sc_firsts[chet], 1, data, 1024, want_voltags); if (error) goto done; st_hdr = (struct read_element_status_header *)data; pg_hdr = (struct read_element_status_page_header *) (st_hdr + 1); desclen = _2btol(pg_hdr->edl); size = sizeof(struct read_element_status_header) + sizeof(struct read_element_status_page_header) + (desclen * sc->sc_counts[chet]); /* * Reallocate storage for descriptors and get them from the * device. */ free(data, M_DEVBUF); data = malloc(size, M_DEVBUF, M_WAITOK); error = ch_getelemstatus(sc, sc->sc_firsts[chet], sc->sc_counts[chet], data, size, want_voltags); if (error) goto done; /* * Fill in the user status array. */ st_hdr = (struct read_element_status_header *)data; pg_hdr = (struct read_element_status_page_header *) (st_hdr + 1); avail = _2btol(st_hdr->count); if (avail != sc->sc_counts[chet]) { error = EINVAL; goto done; } udsize = avail * sizeof(struct changer_element_status); user_data = malloc(udsize, M_DEVBUF, M_WAITOK | M_ZERO); desc = (caddr_t)(pg_hdr + 1); for (i = 0; i < avail; ++i) { struct changer_element_status *ces = &(user_data[i]); copy_element_status(pg_hdr->flags, (struct read_element_status_descriptor *)desc, ces); desc += desclen; } /* Copy array out to userspace. */ error = copyout(user_data, cesr->cesr_data, udsize); done: if (data != NULL) free(data, M_DEVBUF); if (user_data != NULL) free(user_data, M_DEVBUF); return (error); } int ch_getelemstatus(sc, first, count, data, datalen, voltag) struct ch_softc *sc; int first; int count; caddr_t data; size_t datalen; int voltag; { struct scsi_read_element_status cmd; /* * Build SCSI command. */ bzero(&cmd, sizeof(cmd)); cmd.opcode = READ_ELEMENT_STATUS; _lto2b(first, cmd.sea); _lto2b(count, cmd.count); _lto3b(datalen, cmd.len); if (voltag) cmd.byte2 |= READ_ELEMENT_STATUS_VOLTAG; /* * Send command to changer. */ return (scsi_scsi_cmd(sc->sc_link, (struct scsi_generic *)&cmd, sizeof(cmd), (u_char *)data, datalen, CHRETRIES, 100000, NULL, SCSI_DATA_IN)); } /* * Ask the device about itself and fill in the parameters in our * softc. */ int ch_get_params(sc, flags) struct ch_softc *sc; int flags; { union scsi_mode_sense_buf *data; struct page_element_address_assignment *ea; struct page_device_capabilities *cap; int error, from; u_int8_t *moves, *exchanges; data = malloc(sizeof(*data), M_TEMP, M_NOWAIT); if (data == NULL) return (ENOMEM); /* * Grab info from the element address assignment page (0x1d). */ error = scsi_do_mode_sense(sc->sc_link, 0x1d, data, (void **)&ea, NULL, NULL, NULL, sizeof(*ea), flags, NULL); if (error == 0 && ea == NULL) error = EIO; if (error != 0) { #ifdef CHANGER_DEBUG printf("%s: could not sense element address page\n", sc->sc_dev.dv_xname); #endif free(data, M_TEMP); return (error); } sc->sc_firsts[CHET_MT] = _2btol(ea->mtea); sc->sc_counts[CHET_MT] = _2btol(ea->nmte); sc->sc_firsts[CHET_ST] = _2btol(ea->fsea); sc->sc_counts[CHET_ST] = _2btol(ea->nse); sc->sc_firsts[CHET_IE] = _2btol(ea->fieea); sc->sc_counts[CHET_IE] = _2btol(ea->niee); sc->sc_firsts[CHET_DT] = _2btol(ea->fdtea); sc->sc_counts[CHET_DT] = _2btol(ea->ndte); /* XXX Ask for transport geometry page. */ /* * Grab info from the capabilities page (0x1f). */ error = scsi_do_mode_sense(sc->sc_link, 0x1f, data, (void **)&cap, NULL, NULL, NULL, sizeof(*cap), flags, NULL); if (cap == NULL) error = EIO; if (error != 0) { #ifdef CHANGER_DEBUG printf("%s: could not sense capabilities page\n", sc->sc_dev.dv_xname); #endif free(data, M_TEMP); return (error); } bzero(sc->sc_movemask, sizeof(sc->sc_movemask)); bzero(sc->sc_exchangemask, sizeof(sc->sc_exchangemask)); moves = &cap->move_from_mt; exchanges = &cap->exchange_with_mt; for (from = CHET_MT; from <= CHET_DT; ++from) { sc->sc_movemask[from] = moves[from]; sc->sc_exchangemask[from] = exchanges[from]; } sc->sc_link->flags |= SDEV_MEDIA_LOADED; free(data, M_TEMP); return (0); } void ch_get_quirks(sc, inqbuf) struct ch_softc *sc; struct scsi_inquiry_data *inqbuf; { const struct chquirk *match; int priority; sc->sc_settledelay = 0; match = (const struct chquirk *)scsi_inqmatch(inqbuf, (caddr_t)chquirks, sizeof(chquirks) / sizeof(chquirks[0]), sizeof(chquirks[0]), &priority); if (priority != 0) { sc->sc_settledelay = match->cq_settledelay; } } /* * Look at the returned sense and act on the error and detirmine * The unix error number to pass back... (0 = report no error) * (-1 = continue processing) */ int ch_interpret_sense(xs) struct scsi_xfer *xs; { struct scsi_sense_data *sense = &xs->sense; struct scsi_link *sc_link = xs->sc_link; u_int8_t serr = sense->error_code & SSD_ERRCODE; u_int8_t skey = sense->flags & SSD_KEY; if (((sc_link->flags & SDEV_OPEN) == 0) || (serr != SSD_ERRCODE_CURRENT && serr != SSD_ERRCODE_DEFERRED)) return (EJUSTRETURN); /* let the generic code handle it */ switch (skey) { /* * We do custom processing in ch for the unit becoming ready case. * in this case we do not allow xs->retries to be decremented * only on the "Unit Becoming Ready" case. This is because tape * changers report "Unit Becoming Ready" when they rescan their * state (i.e. when the door got opened) and can take a long time * for large units. Rather than having a massive timeout for * all operations (which would cause other problems) we allow * changers to wait (but be interruptable with Ctrl-C) forever * as long as they are reporting that they are becoming ready. * all other cases are handled as per the default. */ case SKEY_NOT_READY: if ((xs->flags & SCSI_IGNORE_NOT_READY) != 0) return (0); switch (ASC_ASCQ(sense)) { case SENSE_NOT_READY_BECOMING_READY: SC_DEBUG(sc_link, SDEV_DB1, ("not ready: busy (%#x)\n", sense->add_sense_code_qual)); /* don't count this as a retry */ xs->retries++; return (scsi_delay(xs, 1)); default: return (EJUSTRETURN); } default: return (EJUSTRETURN); } }