diff options
Diffstat (limited to 'sys/dev/vscsi.c')
| -rw-r--r-- | sys/dev/vscsi.c | 56 |
1 files changed, 29 insertions, 27 deletions
diff --git a/sys/dev/vscsi.c b/sys/dev/vscsi.c index 245b475bc3a..05267d38e6e 100644 --- a/sys/dev/vscsi.c +++ b/sys/dev/vscsi.c @@ -1,4 +1,4 @@ -/* $OpenBSD: vscsi.c,v 1.18 2010/09/21 04:33:35 matthew Exp $ */ +/* $OpenBSD: vscsi.c,v 1.19 2010/09/22 03:51:47 dlg Exp $ */ /* * Copyright (c) 2008 David Gwynne <dlg@openbsd.org> @@ -62,7 +62,7 @@ struct vscsi_softc { struct mutex sc_state_mtx; enum vscsi_state sc_state; - u_int sc_ccb_count; + u_int sc_ref_count; struct pool sc_ccb_pool; struct scsi_iopool sc_iopool; @@ -94,12 +94,13 @@ struct cfdriver vscsi_cd = { void vscsi_cmd(struct scsi_xfer *); int vscsi_probe(struct scsi_link *); +void vscsi_free(struct scsi_link *); struct scsi_adapter vscsi_switch = { vscsi_cmd, scsi_minphys, vscsi_probe, - NULL + vscsi_free }; int vscsi_i2t(struct vscsi_softc *, struct vscsi_ioc_i2t *); @@ -221,15 +222,30 @@ int vscsi_probe(struct scsi_link *link) { struct vscsi_softc *sc = link->adapter_softc; - int rv; + int rv = 0; mtx_enter(&sc->sc_state_mtx); - rv = (sc->sc_state == VSCSI_S_RUNNING) ? 0 : ENXIO; + if (sc->sc_state == VSCSI_S_RUNNING) + sc->sc_ref_count++; + else + rv = ENXIO; mtx_leave(&sc->sc_state_mtx); return (rv); } +void +vscsi_free(struct scsi_link *link) +{ + struct vscsi_softc *sc = link->adapter_softc; + + mtx_enter(&sc->sc_state_mtx); + sc->sc_ref_count--; + if (sc->sc_state != VSCSI_S_RUNNING && sc->sc_ref_count == 0) + wakeup(&sc->sc_ref_count); + mtx_leave(&sc->sc_state_mtx); +} + int vscsiopen(dev_t dev, int flags, int mode, struct proc *p) { @@ -254,6 +270,7 @@ vscsiopen(dev_t dev, int flags, int mode, struct proc *p) pool_init(&sc->sc_ccb_pool, sizeof(struct vscsi_ccb), 0, 0, 0, "vscsiccb", NULL); + pool_setipl(&sc->sc_ccb_pool, IPL_BIO); /* we need to guarantee some ccbs will be available for the iopool */ rv = pool_prime(&sc->sc_ccb_pool, 8); @@ -527,7 +544,6 @@ vscsiclose(dev_t dev, int flags, int mode, struct proc *p) { struct vscsi_softc *sc = DEV2SC(dev); struct vscsi_ccb *ccb; - int i; mtx_enter(&sc->sc_state_mtx); KASSERT(sc->sc_state == VSCSI_S_RUNNING); @@ -546,18 +562,17 @@ vscsiclose(dev_t dev, int flags, int mode, struct proc *p) vscsi_done(sc, ccb); } + scsi_req_detach(sc->sc_scsibus, -1, -1, DETACH_FORCE); + mtx_enter(&sc->sc_state_mtx); - while (sc->sc_ccb_count > 0) { - msleep(&sc->sc_ccb_count, &sc->sc_state_mtx, - PRIBIO, "vscsiccb", 0); + while (sc->sc_ref_count > 0) { + msleep(&sc->sc_ref_count, &sc->sc_state_mtx, + PRIBIO, "vscsiref", 0); } mtx_leave(&sc->sc_state_mtx); pool_destroy(&sc->sc_ccb_pool); - for (i = 0; i < sc->sc_link.adapter_buswidth; i++) - scsi_detach_target(sc->sc_scsibus, i, DETACH_FORCE); - mtx_enter(&sc->sc_state_mtx); sc->sc_state = VSCSI_S_CLOSED; mtx_leave(&sc->sc_state_mtx); @@ -572,15 +587,11 @@ vscsi_ccb_get(void *cookie) struct vscsi_softc *sc = cookie; struct vscsi_ccb *ccb = NULL; - mtx_enter(&sc->sc_state_mtx); - if (sc->sc_state == VSCSI_S_RUNNING && - (ccb = pool_get(&sc->sc_ccb_pool, PR_NOWAIT)) != NULL) { + ccb = pool_get(&sc->sc_ccb_pool, PR_NOWAIT); + if (ccb != NULL) { ccb->ccb_tag = sc->sc_ccb_tag++; ccb->ccb_datalen = 0; - - sc->sc_ccb_count++; } - mtx_leave(&sc->sc_state_mtx); return (ccb); } @@ -591,14 +602,5 @@ vscsi_ccb_put(void *cookie, void *io) struct vscsi_softc *sc = cookie; struct vscsi_ccb *ccb = io; - mtx_enter(&sc->sc_state_mtx); - pool_put(&sc->sc_ccb_pool, ccb); - sc->sc_ccb_count--; - - if (sc->sc_state != VSCSI_S_RUNNING && - sc->sc_ccb_count == 0) - wakeup(&sc->sc_ccb_count); - - mtx_leave(&sc->sc_state_mtx); } |