diff options
Diffstat (limited to 'sys/dev/ic/cac.c')
| -rw-r--r-- | sys/dev/ic/cac.c | 82 |
1 files changed, 35 insertions, 47 deletions
diff --git a/sys/dev/ic/cac.c b/sys/dev/ic/cac.c index 0bb2224ff0d..b1b983556b3 100644 --- a/sys/dev/ic/cac.c +++ b/sys/dev/ic/cac.c @@ -1,8 +1,8 @@ -/* $OpenBSD: cac.c,v 1.6 2001/08/16 17:26:51 brad Exp $ */ +/* $OpenBSD: cac.c,v 1.7 2001/10/18 20:24:10 mickey Exp $ */ /* $NetBSD: cac.c,v 1.15 2000/11/08 19:20:35 ad Exp $ */ /* - * Copyright (c) 2000 Michael Shalayeff + * Copyright (c) 2001 Michael Shalayeff * All rights reserved. * * The SCSI emulation layer is derived from gdt(4) driver, @@ -481,6 +481,7 @@ cac_ccb_done(struct cac_softc *sc, struct cac_ccb *ccb) printf("%s: invalid request\n", sc->sc_dv.dv_xname); } + cac_ccb_free(sc, ccb); if (xs) { if (error) xs->error = XS_DRIVER_STUFFUP; @@ -491,7 +492,6 @@ cac_ccb_done(struct cac_softc *sc, struct cac_ccb *ccb) scsi_done(xs); } - cac_ccb_free(sc, ccb); } /* @@ -504,19 +504,10 @@ cac_ccb_alloc(struct cac_softc *sc, int nosleep) int s; s = splbio(); - - for (;;) { - if ((ccb = SIMPLEQ_FIRST(&sc->sc_ccb_free)) != NULL) { - SIMPLEQ_REMOVE_HEAD(&sc->sc_ccb_free, ccb, ccb_chain); - break; - } - if (nosleep) { - ccb = NULL; - break; - } - tsleep(&sc->sc_ccb_free, PRIBIO, "cacccb", 0); - } - + if ((ccb = SIMPLEQ_FIRST(&sc->sc_ccb_free)) != NULL) + SIMPLEQ_REMOVE_HEAD(&sc->sc_ccb_free, ccb, ccb_chain); + else + ccb = NULL; splx(s); return (ccb); } @@ -532,8 +523,6 @@ cac_ccb_free(struct cac_softc *sc, struct cac_ccb *ccb) ccb->ccb_flags = 0; s = splbio(); SIMPLEQ_INSERT_HEAD(&sc->sc_ccb_free, ccb, ccb_chain); - if (SIMPLEQ_NEXT(ccb, ccb_chain) == NULL) - wakeup(&sc->sc_ccb_free); splx(s); } @@ -599,7 +588,7 @@ cac_scsi_cmd(xs) u_int32_t blockno, blockcnt, size; struct scsi_rw *rw; struct scsi_rw_big *rwb; - int op, flags, s; + int op, flags, s, error; const char *p; if (target >= sc->sc_nunits || link->lun != 0) { @@ -697,7 +686,7 @@ cac_scsi_cmd(xs) } bzero(&rcd, sizeof rcd); _lto4b( CAC_GET2(dinfo->ncylinders) * CAC_GET1(dinfo->nheads) * - CAC_GET1(dinfo->nsectors), rcd.addr); + CAC_GET1(dinfo->nsectors) - 1, rcd.addr); _lto4b(CAC_SECTOR_SIZE, rcd.length); cac_copy_internal_data(xs, &rcd, sizeof rcd); break; @@ -723,30 +712,26 @@ cac_scsi_cmd(xs) s = splbio(); flags = 0; - if (xs->cmd->opcode != SYNCHRONIZE_CACHE) { - /* A read or write operation. */ - if (xs->cmdlen == 6) { - rw = (struct scsi_rw *)xs->cmd; - blockno = _3btol(rw->addr) & - (SRW_TOPADDR << 16 | 0xffff); - blockcnt = rw->length ? rw->length : 0x100; - } else { - rwb = (struct scsi_rw_big *)xs->cmd; - blockno = _4btol(rwb->addr); - blockcnt = _2btol(rwb->length); - } - size = CAC_GET2(dinfo->ncylinders) * - CAC_GET1(dinfo->nheads) * - CAC_GET1(dinfo->nsectors); - if (blockno >= size || blockno + blockcnt > size) { - splx(s); - printf("%s: out of bounds %u-%u >= %u\n", - sc->sc_dv.dv_xname, blockno, blockcnt, - size); - xs->error = XS_DRIVER_STUFFUP; - scsi_done(xs); - return (COMPLETE); - } + /* A read or write operation. */ + if (xs->cmdlen == 6) { + rw = (struct scsi_rw *)xs->cmd; + blockno = _3btol(rw->addr) & + (SRW_TOPADDR << 16 | 0xffff); + blockcnt = rw->length ? rw->length : 0x100; + } else { + rwb = (struct scsi_rw_big *)xs->cmd; + blockno = _4btol(rwb->addr); + blockcnt = _2btol(rwb->length); + } + size = CAC_GET2(dinfo->ncylinders) * + CAC_GET1(dinfo->nheads) * CAC_GET1(dinfo->nsectors); + if (blockno >= size || blockno + blockcnt > size) { + splx(s); + printf("%s: out of bounds %u-%u >= %u\n", + sc->sc_dv.dv_xname, blockno, blockcnt, size); + xs->error = XS_DRIVER_STUFFUP; + scsi_done(xs); + return (COMPLETE); } switch (xs->cmd->opcode) { @@ -762,11 +747,14 @@ cac_scsi_cmd(xs) break; } - if (cac_cmd(sc, op, xs->data, blockcnt * DEV_BSIZE, target, - blockno, flags, xs)) { + if ((error = cac_cmd(sc, op, xs->data, blockcnt * DEV_BSIZE, + target, blockno, flags, xs))) { splx(s); - if (xs->flags & SCSI_POLL) { + if (error == ENOMEM) { + xs->error = XS_DRIVER_STUFFUP; + return (TRY_AGAIN_LATER); + } else if (xs->flags & SCSI_POLL) { xs->error = XS_TIMEOUT; return (TRY_AGAIN_LATER); } else { |