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Add a "flush" operation so the array's write cache is flushed on 

close and at shutdown.
This commit is contained in:
thorpej 2004-05-27 23:48:34 +00:00
parent a8d1145d1b
commit ef42d1cdb3
1 changed files with 40 additions and 2 deletions
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42
sys/dev/pci/ld_twe.c
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@ -1,4 +1,4 @@
/* $NetBSD: ld_twe.c,v 1.19 2004/04/22 00:17:12 itojun Exp $ */
/* $NetBSD: ld_twe.c,v 1.20 2004/05/27 23:48:34 thorpej Exp $ */
/*-
* Copyright (c) 2000, 2001, 2002, 2003 The NetBSD Foundation, Inc.
@ -41,7 +41,7 @@
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: ld_twe.c,v 1.19 2004/04/22 00:17:12 itojun Exp $");
__KERNEL_RCSID(0, "$NetBSD: ld_twe.c,v 1.20 2004/05/27 23:48:34 thorpej Exp $");
#include "rnd.h"
@ -76,6 +76,7 @@ static int ld_twe_detach(struct device *, int);
static int ld_twe_dobio(struct ld_twe_softc *, void *, int, int, int,
struct buf *);
static int ld_twe_dump(struct ld_softc *, void *, int, int);
static int ld_twe_flush(struct ld_softc *);
static void ld_twe_handler(struct twe_ccb *, int);
static int ld_twe_match(struct device *, struct cfdata *, void *);
static int ld_twe_start(struct ld_softc *, struct buf *);
@ -125,6 +126,7 @@ ld_twe_attach(struct device *parent, struct device *self, void *aux)
ld->sc_maxqueuecnt = twe->sc_openings;
ld->sc_start = ld_twe_start;
ld->sc_dump = ld_twe_dump;
ld->sc_flush = ld_twe_flush;
typestr = twe_describe_code(twe_table_unittype, td->td_type);
if (typestr == NULL) {
@ -276,6 +278,42 @@ ld_twe_dump(struct ld_softc *ld, void *data, int blkno, int blkcnt)
blkcnt * ld->sc_secsize, blkno, 1, NULL));
}
static int
ld_twe_flush(struct ld_softc *ld)
{
struct ld_twe_softc *sc = (void *) ld;
struct twe_softc *twe = (void *) ld->sc_dv.dv_parent;
struct twe_ccb *ccb;
struct twe_cmd *tc;
int s, rv;
ccb = twe_ccb_alloc_wait(twe, 0);
KASSERT(ccb != NULL);
ccb->ccb_data = NULL;
ccb->ccb_datasize = 0;
ccb->ccb_tx.tx_handler = twe_ccb_wait_handler;
ccb->ccb_tx.tx_context = NULL;
ccb->ccb_tx.tx_dv = &ld->sc_dv;
tc = ccb->ccb_cmd;
tc->tc_size = 2;
tc->tc_opcode = TWE_OP_FLUSH;
tc->tc_unit = sc->sc_hwunit;
tc->tc_count = 0;
rv = 0;
twe_ccb_enqueue(twe, ccb);
s = splbio();
while ((ccb->ccb_flags & TWE_CCB_COMPLETE) == 0)
if ((rv = tsleep(ccb, PRIBIO, "tweflush", 60 * hz)) != 0)
break;
twe_ccb_free(twe, ccb);
splx(s);
return (rv);
}
static void
ld_twe_adjqparam(struct device *self, int openings)
{