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deallocate mbuf cache on ifconfig down.

This commit is contained in:
deraadt 1994-04-13 06:09:00 +00:00
parent eee893f9ea
commit 920c317ff9
2 changed files with 56 additions and 36 deletions
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46
sys/arch/i386/isa/if_ep.c
View File

@ -21,12 +21,7 @@
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* $Id: if_ep.c,v 1.28 1994/04/11 11:09:00 deraadt Exp $
*/
/*
* TODO:
* Multi-509 configs.
* deallocate mbufs when ifconfig'd down.
* $Id: if_ep.c,v 1.29 1994/04/13 06:09:00 deraadt Exp $
*/
#include "bpfilter.h"
@ -106,7 +101,8 @@ static int epstart __P((struct ifnet *));
static int epwatchdog __P((int));
static void epreset __P((struct ep_softc *));
static void epread __P((struct ep_softc *));
static void epmbufqueue __P((struct ep_softc *));
static void epmbuffill __P((struct ep_softc *));
static void epmbufempty __P((struct ep_softc *));
static void epstop __P((struct ep_softc *));
static u_short epreadeeprom __P((int id_port, int offset));
@ -440,7 +436,7 @@ epinit(sc)
*/
sc->last_mb = 0;
sc->next_mb = 0;
epmbufqueue(sc);
epmbuffill(sc);
epstart(ifp);
splx(s);
@ -748,7 +744,7 @@ epread(sc)
if (m == 0)
goto out;
} else {
timeout(epmbufqueue, sc, 1);
timeout(epmbuffill, sc, 1);
sc->next_mb = (sc->next_mb + 1) % MAX_MBS;
}
if (totlen >= MINCLSIZE)
@ -876,6 +872,7 @@ epioctl(ifp, cmd, data)
if ((ifp->if_flags & IFF_UP) == 0 && ifp->if_flags & IFF_RUNNING) {
ifp->if_flags &= ~IFF_RUNNING;
epstop(sc);
epmbufempty(sc);
break;
}
if (ifp->if_flags & IFF_UP && (ifp->if_flags & IFF_RUNNING) == 0)
@ -989,24 +986,37 @@ epbusyeeprom(sc)
}
static void
epmbufqueue(sc)
epmbuffill(sc)
struct ep_softc *sc;
{
int i = 0;
int s;
int s, i;
s = splimp();
i = sc->last_mb;
if (sc->mb[i]) {
splx(s);
return;
}
do {
MGET(sc->mb[i], M_DONTWAIT, MT_DATA);
if (!sc->mb[i])
if (sc->mb[i] == NULL)
MGET(sc->mb[i], M_DONTWAIT, MT_DATA);
if (sc->mb[i] == NULL)
break;
i = (i + 1) % MAX_MBS;
} while (i != sc->next_mb);
sc->last_mb = i;
splx(s);
}
static void
epmbufempty(sc)
struct ep_softc *sc;
{
int s, i;
s = splimp();
for (i = 0; i<MAX_MBS; i++) {
if (sc->mb[i]) {
m_freem(sc->mb[i]);
sc->mb[i] = NULL;
}
}
sc->last_mb = sc->next_mb = 0;
splx(s);
}

46
sys/dev/isa/if_ep.c
View File

@ -21,12 +21,7 @@
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* $Id: if_ep.c,v 1.28 1994/04/11 11:09:00 deraadt Exp $
*/
/*
* TODO:
* Multi-509 configs.
* deallocate mbufs when ifconfig'd down.
* $Id: if_ep.c,v 1.29 1994/04/13 06:09:00 deraadt Exp $
*/
#include "bpfilter.h"
@ -106,7 +101,8 @@ static int epstart __P((struct ifnet *));
static int epwatchdog __P((int));
static void epreset __P((struct ep_softc *));
static void epread __P((struct ep_softc *));
static void epmbufqueue __P((struct ep_softc *));
static void epmbuffill __P((struct ep_softc *));
static void epmbufempty __P((struct ep_softc *));
static void epstop __P((struct ep_softc *));
static u_short epreadeeprom __P((int id_port, int offset));
@ -440,7 +436,7 @@ epinit(sc)
*/
sc->last_mb = 0;
sc->next_mb = 0;
epmbufqueue(sc);
epmbuffill(sc);
epstart(ifp);
splx(s);
@ -748,7 +744,7 @@ epread(sc)
if (m == 0)
goto out;
} else {
timeout(epmbufqueue, sc, 1);
timeout(epmbuffill, sc, 1);
sc->next_mb = (sc->next_mb + 1) % MAX_MBS;
}
if (totlen >= MINCLSIZE)
@ -876,6 +872,7 @@ epioctl(ifp, cmd, data)
if ((ifp->if_flags & IFF_UP) == 0 && ifp->if_flags & IFF_RUNNING) {
ifp->if_flags &= ~IFF_RUNNING;
epstop(sc);
epmbufempty(sc);
break;
}
if (ifp->if_flags & IFF_UP && (ifp->if_flags & IFF_RUNNING) == 0)
@ -989,24 +986,37 @@ epbusyeeprom(sc)
}
static void
epmbufqueue(sc)
epmbuffill(sc)
struct ep_softc *sc;
{
int i = 0;
int s;
int s, i;
s = splimp();
i = sc->last_mb;
if (sc->mb[i]) {
splx(s);
return;
}
do {
MGET(sc->mb[i], M_DONTWAIT, MT_DATA);
if (!sc->mb[i])
if (sc->mb[i] == NULL)
MGET(sc->mb[i], M_DONTWAIT, MT_DATA);
if (sc->mb[i] == NULL)
break;
i = (i + 1) % MAX_MBS;
} while (i != sc->next_mb);
sc->last_mb = i;
splx(s);
}
static void
epmbufempty(sc)
struct ep_softc *sc;
{
int s, i;
s = splimp();
for (i = 0; i<MAX_MBS; i++) {
if (sc->mb[i]) {
m_freem(sc->mb[i]);
sc->mb[i] = NULL;
}
}
sc->last_mb = sc->next_mb = 0;
splx(s);
}