/* $NetBSD: uha.c,v 1.1 1996/08/31 20:26:50 mycroft Exp $ */ #undef UHADEBUG #ifdef DDB #define integrate #else #define integrate static inline #endif /* * Copyright (c) 1994, 1996 Charles M. Hannum. 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 Charles M. Hannum. * 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. */ /* * Ported for use with the UltraStor 14f by Gary Close (gclose@wvnvms.wvnet.edu) * Slight fixes to timeouts to run with the 34F * Thanks to Julian Elischer for advice and help with this port. * * Originally written by Julian Elischer (julian@tfs.com) * for TRW Financial Systems for use under the MACH(2.5) operating system. * * TRW Financial Systems, in accordance with their agreement with Carnegie * Mellon University, makes this software available to CMU to distribute * or use in any manner that they see fit as long as this message is kept with * the software. For this reason TFS also grants any other persons or * organisations permission to use or modify this software. * * TFS supplies this software to be publicly redistributed * on the understanding that TFS is not responsible for the correct * functioning of this software in any circumstances. * * commenced: Sun Sep 27 18:14:01 PDT 1992 * slight mod to make work with 34F as well: Wed Jun 2 18:05:48 WST 1993 */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #ifndef DDB #define Debugger() panic("should call debugger here (ultra14f.c)") #endif /* ! DDB */ #define KVTOPHYS(x) vtophys(x) void uha_reset_mscp __P((struct uha_softc *, struct uha_mscp *)); void uha_free_mscp __P((struct uha_softc *, struct uha_mscp *)); void uha_init_mscp __P((struct uha_softc *, struct uha_mscp *)); struct uha_mscp *uha_get_mscp __P((struct uha_softc *, int)); void uhaminphys __P((struct buf *)); int uha_scsi_cmd __P((struct scsi_xfer *)); struct scsi_adapter uha_switch = { uha_scsi_cmd, uhaminphys, 0, 0, }; /* the below structure is so we have a default dev struct for out link struct */ struct scsi_device uha_dev = { NULL, /* Use default error handler */ NULL, /* have a queue, served by this */ NULL, /* have no async handler */ NULL, /* Use default 'done' routine */ }; struct cfdriver uha_cd = { NULL, "uha", DV_DULL }; #define UHA_ABORT_TIMEOUT 2000 /* time to wait for abort (mSec) */ /* * Attach all the sub-devices we can find */ void uha_attach(sc) struct uha_softc *sc; { (sc->init)(sc); TAILQ_INIT(&sc->sc_free_mscp); /* * fill in the prototype scsi_link. */ sc->sc_link.channel = SCSI_CHANNEL_ONLY_ONE; sc->sc_link.adapter_softc = sc; sc->sc_link.adapter_target = sc->sc_scsi_dev; sc->sc_link.adapter = &uha_switch; sc->sc_link.device = &uha_dev; sc->sc_link.openings = 2; /* * ask the adapter what subunits are present */ config_found(&sc->sc_dev, &sc->sc_link, scsiprint); } integrate void uha_reset_mscp(sc, mscp) struct uha_softc *sc; struct uha_mscp *mscp; { mscp->flags = 0; } /* * A mscp (and hence a mbx-out) is put onto the free list. */ void uha_free_mscp(sc, mscp) struct uha_softc *sc; struct uha_mscp *mscp; { int s; s = splbio(); uha_reset_mscp(sc, mscp); TAILQ_INSERT_HEAD(&sc->sc_free_mscp, mscp, chain); /* * If there were none, wake anybody waiting for one to come free, * starting with queued entries. */ if (mscp->chain.tqe_next == 0) wakeup(&sc->sc_free_mscp); splx(s); } integrate void uha_init_mscp(sc, mscp) struct uha_softc *sc; struct uha_mscp *mscp; { int hashnum; bzero(mscp, sizeof(struct uha_mscp)); /* * put in the phystokv hash table * Never gets taken out. */ mscp->hashkey = KVTOPHYS(mscp); hashnum = MSCP_HASH(mscp->hashkey); mscp->nexthash = sc->sc_mscphash[hashnum]; sc->sc_mscphash[hashnum] = mscp; uha_reset_mscp(sc, mscp); } /* * Get a free mscp * * If there are none, see if we can allocate a new one. If so, put it in the * hash table too otherwise either return an error or sleep. */ struct uha_mscp * uha_get_mscp(sc, flags) struct uha_softc *sc; int flags; { struct uha_mscp *mscp; int s; s = splbio(); /* * If we can and have to, sleep waiting for one to come free * but only if we can't allocate a new one */ for (;;) { mscp = sc->sc_free_mscp.tqh_first; if (mscp) { TAILQ_REMOVE(&sc->sc_free_mscp, mscp, chain); break; } if (sc->sc_nummscps < UHA_MSCP_MAX) { mscp = (struct uha_mscp *) malloc(sizeof(struct uha_mscp), M_TEMP, M_NOWAIT); if (!mscp) { printf("%s: can't malloc mscp\n", sc->sc_dev.dv_xname); goto out; } uha_init_mscp(sc, mscp); sc->sc_nummscps++; break; } if ((flags & SCSI_NOSLEEP) != 0) goto out; tsleep(&sc->sc_free_mscp, PRIBIO, "uhamsc", 0); } mscp->flags |= MSCP_ALLOC; out: splx(s); return (mscp); } /* * given a physical address, find the mscp that it corresponds to. */ struct uha_mscp * uha_mscp_phys_kv(sc, mscp_phys) struct uha_softc *sc; u_long mscp_phys; { int hashnum = MSCP_HASH(mscp_phys); struct uha_mscp *mscp = sc->sc_mscphash[hashnum]; while (mscp) { if (mscp->hashkey == mscp_phys) break; mscp = mscp->nexthash; } return (mscp); } /* * We have a mscp which has been processed by the adaptor, now we look to see * how the operation went. */ void uha_done(sc, mscp) struct uha_softc *sc; struct uha_mscp *mscp; { struct scsi_sense_data *s1, *s2; struct scsi_xfer *xs = mscp->xs; SC_DEBUG(xs->sc_link, SDEV_DB2, ("uha_done\n")); /* * Otherwise, put the results of the operation * into the xfer and call whoever started it */ if ((mscp->flags & MSCP_ALLOC) == 0) { printf("%s: exiting ccb not allocated!\n", sc->sc_dev.dv_xname); Debugger(); return; } if (xs->error == XS_NOERROR) { if (mscp->host_stat != UHA_NO_ERR) { switch (mscp->host_stat) { case UHA_SBUS_TIMEOUT: /* No response */ xs->error = XS_SELTIMEOUT; break; default: /* Other scsi protocol messes */ printf("%s: host_stat %x\n", sc->sc_dev.dv_xname, mscp->host_stat); xs->error = XS_DRIVER_STUFFUP; } } else if (mscp->target_stat != SCSI_OK) { switch (mscp->target_stat) { case SCSI_CHECK: s1 = &mscp->mscp_sense; s2 = &xs->sense; *s2 = *s1; xs->error = XS_SENSE; break; case SCSI_BUSY: xs->error = XS_BUSY; break; default: printf("%s: target_stat %x\n", sc->sc_dev.dv_xname, mscp->target_stat); xs->error = XS_DRIVER_STUFFUP; } } else xs->resid = 0; } uha_free_mscp(sc, mscp); xs->flags |= ITSDONE; scsi_done(xs); } void uhaminphys(bp) struct buf *bp; { if (bp->b_bcount > ((UHA_NSEG - 1) << PGSHIFT)) bp->b_bcount = ((UHA_NSEG - 1) << PGSHIFT); minphys(bp); } /* * start a scsi operation given the command and the data address. Also * needs the unit, target and lu. */ int uha_scsi_cmd(xs) struct scsi_xfer *xs; { struct scsi_link *sc_link = xs->sc_link; struct uha_softc *sc = sc_link->adapter_softc; struct uha_mscp *mscp; struct uha_dma_seg *sg; int seg; /* scatter gather seg being worked on */ u_long thiskv, thisphys, nextphys; int bytes_this_seg, bytes_this_page, datalen, flags; struct iovec *iovp; int s; SC_DEBUG(sc_link, SDEV_DB2, ("uha_scsi_cmd\n")); /* * get a mscp (mbox-out) to use. If the transfer * is from a buf (possibly from interrupt time) * then we can't allow it to sleep */ flags = xs->flags; if ((mscp = uha_get_mscp(sc, flags)) == NULL) { xs->error = XS_DRIVER_STUFFUP; return (TRY_AGAIN_LATER); } mscp->xs = xs; mscp->timeout = xs->timeout; /* * Put all the arguments for the xfer in the mscp */ if (flags & SCSI_RESET) { mscp->opcode = UHA_SDR; mscp->ca = 0x01; } else { mscp->opcode = UHA_TSP; /* XXX Not for tapes. */ mscp->ca = 0x01; bcopy(xs->cmd, &mscp->scsi_cmd, mscp->scsi_cmd_length); } mscp->xdir = UHA_SDET; mscp->dcn = 0x00; mscp->chan = 0x00; mscp->target = sc_link->target; mscp->lun = sc_link->lun; mscp->scsi_cmd_length = xs->cmdlen; mscp->sense_ptr = KVTOPHYS(&mscp->mscp_sense); mscp->req_sense_length = sizeof(mscp->mscp_sense); mscp->host_stat = 0x00; mscp->target_stat = 0x00; if (xs->datalen) { sg = mscp->uha_dma; seg = 0; #ifdef TFS if (flags & SCSI_DATA_UIO) { iovp = ((struct uio *) xs->data)->uio_iov; datalen = ((struct uio *) xs->data)->uio_iovcnt; xs->datalen = 0; while (datalen && seg < UHA_NSEG) { sg->seg_addr = (physaddr)iovp->iov_base; sg->seg_len = iovp->iov_len; xs->datalen += iovp->iov_len; SC_DEBUGN(sc_link, SDEV_DB4, ("(0x%x@0x%x)", iovp->iov_len, iovp->iov_base)); sg++; iovp++; seg++; datalen--; } } else #endif /*TFS */ { /* * Set up the scatter gather block */ SC_DEBUG(sc_link, SDEV_DB4, ("%d @0x%x:- ", xs->datalen, xs->data)); datalen = xs->datalen; thiskv = (int) xs->data; thisphys = KVTOPHYS(thiskv); while (datalen && seg < UHA_NSEG) { bytes_this_seg = 0; /* put in the base address */ sg->seg_addr = thisphys; SC_DEBUGN(sc_link, SDEV_DB4, ("0x%x", thisphys)); /* do it at least once */ nextphys = thisphys; while (datalen && thisphys == nextphys) { /* * This page is contiguous (physically) * with the the last, just extend the * length */ /* how far to the end of the page */ nextphys = (thisphys & ~PGOFSET) + NBPG; bytes_this_page = nextphys - thisphys; /**** or the data ****/ bytes_this_page = min(bytes_this_page, datalen); bytes_this_seg += bytes_this_page; datalen -= bytes_this_page; /* get more ready for the next page */ thiskv = (thiskv & ~PGOFSET) + NBPG; if (datalen) thisphys = KVTOPHYS(thiskv); } /* * next page isn't contiguous, finish the seg */ SC_DEBUGN(sc_link, SDEV_DB4, ("(0x%x)", bytes_this_seg)); sg->seg_len = bytes_this_seg; sg++; seg++; } } /* end of iov/kv decision */ SC_DEBUGN(sc_link, SDEV_DB4, ("\n")); if (datalen) { /* * there's still data, must have run out of segs! */ printf("%s: uha_scsi_cmd, more than %d dma segs\n", sc->sc_dev.dv_xname, UHA_NSEG); goto bad; } mscp->data_addr = KVTOPHYS(mscp->uha_dma); mscp->data_length = xs->datalen; mscp->sgth = 0x01; mscp->sg_num = seg; } else { /* No data xfer, use non S/G values */ mscp->data_addr = (physaddr)0; mscp->data_length = 0; mscp->sgth = 0x00; mscp->sg_num = 0; } mscp->link_id = 0; mscp->link_addr = (physaddr)0; s = splbio(); (sc->start_mbox)(sc, mscp); splx(s); /* * Usually return SUCCESSFULLY QUEUED */ if ((flags & SCSI_POLL) == 0) return (SUCCESSFULLY_QUEUED); /* * If we can't use interrupts, poll on completion */ if ((sc->poll)(sc, xs, mscp->timeout)) { uha_timeout(mscp); if ((sc->poll)(sc, xs, mscp->timeout)) uha_timeout(mscp); } return (COMPLETE); bad: xs->error = XS_DRIVER_STUFFUP; uha_free_mscp(sc, mscp); return (COMPLETE); } void uha_timeout(arg) void *arg; { struct uha_mscp *mscp = arg; struct scsi_xfer *xs = mscp->xs; struct scsi_link *sc_link = xs->sc_link; struct uha_softc *sc = sc_link->adapter_softc; int s; sc_print_addr(sc_link); printf("timed out"); s = splbio(); if (mscp->flags & MSCP_ABORT) { /* abort timed out */ printf(" AGAIN\n"); /* XXX Must reset! */ } else { /* abort the operation that has timed out */ printf("\n"); mscp->xs->error = XS_TIMEOUT; mscp->timeout = UHA_ABORT_TIMEOUT; mscp->flags |= MSCP_ABORT; (sc->start_mbox)(sc, mscp); } splx(s); }