/* $NetBSD: ch.c,v 1.24 1996/10/12 23:23:14 christos Exp $ */ /* * Copyright (c) 1996 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 */ }; /* sc_flags */ #define CHF_ROTATE 0x01 /* picker can rotate */ /* Autoconfiguration glue */ int chmatch __P((struct device *, void *, void *)); void chattach __P((struct device *, struct device *, void *)); struct cfattach ch_ca = { sizeof(struct ch_softc), chmatch, chattach }; struct cfdriver ch_cd = { NULL, "ch", DV_DULL }; struct scsi_inquiry_pattern ch_patterns[] = { {T_CHANGER, T_REMOV, "", "", ""}, }; /* SCSI glue */ struct scsi_device ch_switch = { NULL, NULL, NULL, NULL }; int ch_move __P((struct ch_softc *, struct changer_move *)); int ch_exchange __P((struct ch_softc *, struct changer_exchange *)); int ch_position __P((struct ch_softc *, struct changer_position *)); int ch_usergetelemstatus __P((struct ch_softc *, int, u_int8_t *)); int ch_getelemstatus __P((struct ch_softc *, int, int, caddr_t, size_t)); int ch_get_params __P((struct ch_softc *, int)); int chmatch(parent, match, aux) struct device *parent; void *match, *aux; { struct scsibus_attach_args *sa = aux; int priority; (void)scsi_inqmatch(sa->sa_inqbuf, (caddr_t)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 scsibus_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"); /* * Get information about the device. Note we can't use * interrupts yet. */ if (ch_get_params(sc, SCSI_AUTOCONF)) printf("%s: offline\n", sc->sc_dev.dv_xname); else { printf("%s: %d slot%s, %d drive%s, %d picker%s", sc->sc_dev.dv_xname, sc->sc_counts[CHET_ST], (sc->sc_counts[CHET_ST] > 1) ? "s" : "", sc->sc_counts[CHET_DT], (sc->sc_counts[CHET_DT] > 1) ? "s" : "", sc->sc_counts[CHET_MT], (sc->sc_counts[CHET_MT] > 1) ? "s" : ""); if (sc->sc_counts[CHET_IE]) printf(", %d portal%s", sc->sc_counts[CHET_IE], (sc->sc_counts[CHET_IE] > 1) ? "s" : ""); printf("\n"); #ifdef CHANGER_DEBUG 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]; } int chopen(dev, flags, fmt, p) dev_t dev; int flags, fmt; struct proc *p; { struct ch_softc *sc; int 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. Ignore "not ready" * since this might occur if e.g. a tape isn't actually * loaded in the drive. */ error = scsi_test_unit_ready(sc->sc_link, SCSI_IGNORE_NOT_READY|SCSI_IGNORE_MEDIA_CHANGE); if (error) goto bad; /* * Make sure our parameters are up to date. */ if ((error = ch_get_params(sc, 0)) != 0) goto bad; 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 *ces = (struct changer_element_status *)data; error = ch_usergetelemstatus(sc, ces->ces_type, ces->ces_data); 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)); } /* * 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 * flags bytes). */ int ch_usergetelemstatus(sc, chet, uptr) struct ch_softc *sc; int chet; u_int8_t *uptr; { struct read_element_status_header *st_hdr; struct read_element_status_page_header *pg_hdr; struct read_element_status_descriptor *desc; caddr_t data = NULL; size_t size, desclen; int avail, i, error = 0; u_int8_t *user_data = NULL; /* * 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 = (caddr_t)malloc(1024, M_DEVBUF, M_WAITOK); error = ch_getelemstatus(sc, sc->sc_firsts[chet], 1, data, 1024); if (error) goto done; st_hdr = (struct read_element_status_header *)data; pg_hdr = (struct read_element_status_page_header *)((u_long)st_hdr + sizeof(struct read_element_status_header)); 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 = (caddr_t)malloc(size, M_DEVBUF, M_WAITOK); error = ch_getelemstatus(sc, sc->sc_firsts[chet], sc->sc_counts[chet], data, size); if (error) goto done; /* * Fill in the user status array. */ st_hdr = (struct read_element_status_header *)data; avail = _2btol(st_hdr->count); if (avail != sc->sc_counts[chet]) printf("%s: warning, READ ELEMENT STATUS avail != count\n", sc->sc_dev.dv_xname); user_data = (u_int8_t *)malloc(avail, M_DEVBUF, M_WAITOK); desc = (struct read_element_status_descriptor *)((u_long)data + sizeof(struct read_element_status_header) + sizeof(struct read_element_status_page_header)); for (i = 0; i < avail; ++i) { user_data[i] = desc->flags1; (u_long)desc += desclen; } /* Copy flags array out to userspace. */ error = copyout(user_data, uptr, avail); 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) struct ch_softc *sc; int first, count; caddr_t data; size_t datalen; { 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); /* * Send command to changer. */ return (scsi_scsi_cmd(sc->sc_link, (struct scsi_generic *)&cmd, sizeof(cmd), (u_char *)data, datalen, CHRETRIES, 100000, NULL, 0)); } /* * Ask the device about itself and fill in the parameters in our * softc. */ int ch_get_params(sc, scsiflags) struct ch_softc *sc; int scsiflags; { struct scsi_mode_sense cmd; struct scsi_mode_sense_data { struct scsi_mode_header header; union { struct page_element_address_assignment ea; struct page_transport_geometry_parameters tg; struct page_device_capabilities cap; } pages; } sense_data; int error, from; u_int8_t *moves, *exchanges; /* * Grab info from the element address assignment page. */ bzero(&cmd, sizeof(cmd)); bzero(&sense_data, sizeof(sense_data)); cmd.opcode = MODE_SENSE; cmd.byte2 |= 0x08; /* disable block descriptors */ cmd.page = 0x1d; cmd.length = (sizeof(sense_data) & 0xff); error = scsi_scsi_cmd(sc->sc_link, (struct scsi_generic *)&cmd, sizeof(cmd), (u_char *)&sense_data, sizeof(sense_data), CHRETRIES, 6000, NULL, scsiflags | SCSI_DATA_IN); if (error) { printf("%s: could not sense element address page\n", sc->sc_dev.dv_xname); return (error); } sc->sc_firsts[CHET_MT] = _2btol(sense_data.pages.ea.mtea); sc->sc_counts[CHET_MT] = _2btol(sense_data.pages.ea.nmte); sc->sc_firsts[CHET_ST] = _2btol(sense_data.pages.ea.fsea); sc->sc_counts[CHET_ST] = _2btol(sense_data.pages.ea.nse); sc->sc_firsts[CHET_IE] = _2btol(sense_data.pages.ea.fieea); sc->sc_counts[CHET_IE] = _2btol(sense_data.pages.ea.niee); sc->sc_firsts[CHET_DT] = _2btol(sense_data.pages.ea.fdtea); sc->sc_counts[CHET_DT] = _2btol(sense_data.pages.ea.ndte); /* XXX ask for page trasport geom */ /* * Grab info from the capabilities page. */ bzero(&cmd, sizeof(cmd)); bzero(&sense_data, sizeof(sense_data)); cmd.opcode = MODE_SENSE; cmd.byte2 |= 0x08; /* disable block descriptors */ cmd.page = 0x1f; cmd.length = (sizeof(sense_data) & 0xff); error = scsi_scsi_cmd(sc->sc_link, (struct scsi_generic *)&cmd, sizeof(cmd), (u_char *)&sense_data, sizeof(sense_data), CHRETRIES, 6000, NULL, scsiflags | SCSI_DATA_IN); if (error) { printf("%s: could not sense capabilities page\n", sc->sc_dev.dv_xname); return (error); } bzero(sc->sc_movemask, sizeof(sc->sc_movemask)); bzero(sc->sc_exchangemask, sizeof(sc->sc_exchangemask)); moves = &sense_data.pages.cap.move_from_mt; exchanges = &sense_data.pages.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; return (0); }