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Use a private callout timer to drive the transmit watchdog instead of using

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if_watchdog and if_timer.  The driver already contained an optional stats
timer that individual attachments could use to provide a 'tick' event.  The
stats timer only ran if the tick function pointer was non-NULL and the
attachment's tick routine had to call callout_reset(), etc.  Now the driver
always schedules a stat timer and manages the callout_reset() internally.
This timer is used to drive the watchdog and will also call the attachment's
'tick' handler if one is provided.

Tested by:	WATANABE Kazuhiro
This commit is contained in:
jhb 2009-11-17 14:23:09 +00:00
parent 4d92e27818
commit 081b0ae5b0
3 changed files with 33 additions and 20 deletions
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42
sys/dev/ed/if_ed.c
View File

@ -77,7 +77,8 @@ static int ed_ioctl(struct ifnet *, u_long, caddr_t);
static void ed_start(struct ifnet *);
static void ed_start_locked(struct ifnet *);
static void ed_reset(struct ifnet *);
static void ed_watchdog(struct ifnet *);
static void ed_tick(void *);
static void ed_watchdog(struct ed_softc *);
static void ed_ds_getmcaf(struct ed_softc *, uint32_t *);
@ -281,7 +282,6 @@ ed_attach(device_t dev)
if_initname(ifp, device_get_name(dev), device_get_unit(dev));
ifp->if_start = ed_start;
ifp->if_ioctl = ed_ioctl;
ifp->if_watchdog = ed_watchdog;
ifp->if_init = ed_init;
IFQ_SET_MAXLEN(&ifp->if_snd, IFQ_MAXLEN);
ifp->if_snd.ifq_drv_maxlen = IFQ_MAXLEN;
@ -381,8 +381,8 @@ ed_detach(device_t dev)
ed_stop(sc);
ifp->if_drv_flags &= ~IFF_DRV_RUNNING;
ED_UNLOCK(sc);
callout_drain(&sc->tick_ch);
ether_ifdetach(ifp);
callout_drain(&sc->tick_ch);
}
if (sc->irq_res != NULL && sc->irq_handle)
bus_teardown_intr(dev, sc->irq_res, sc->irq_handle);
@ -447,26 +447,42 @@ void
ed_stop(struct ed_softc *sc)
{
ED_ASSERT_LOCKED(sc);
if (sc->sc_tick)
callout_stop(&sc->tick_ch);
ed_stop_hw(sc);
}
/*
* Periodic timer used to drive the watchdog and attachment-specific
* tick handler.
*/
static void
ed_tick(void *arg)
{
struct ed_softc *sc;
sc = arg;
ED_ASSERT_LOCKED(sc);
if (sc->sc_tick)
sc->sc_tick(sc);
if (sc->tx_timer != 0 && --sc->tx_timer == 0)
ed_watchdog(sc);
callout_reset(&sc->tick_ch, hz, ed_tick, sc);
}
/*
* Device timeout/watchdog routine. Entered if the device neglects to
* generate an interrupt after a transmit has been started on it.
*/
static void
ed_watchdog(struct ifnet *ifp)
ed_watchdog(struct ed_softc *sc)
{
struct ed_softc *sc = ifp->if_softc;
struct ifnet *ifp;
ifp = sc->ifp;
log(LOG_ERR, "%s: device timeout\n", ifp->if_xname);
ifp->if_oerrors++;
ED_LOCK(sc);
ed_reset(ifp);
ED_UNLOCK(sc);
}
/*
@ -499,7 +515,7 @@ ed_init_locked(struct ed_softc *sc)
/* reset transmitter flags */
sc->xmit_busy = 0;
ifp->if_timer = 0;
sc->tx_timer = 0;
sc->txb_inuse = 0;
sc->txb_new = 0;
@ -612,8 +628,7 @@ ed_init_locked(struct ed_softc *sc)
*/
ed_start_locked(ifp);
if (sc->sc_tick)
callout_reset(&sc->tick_ch, hz, sc->sc_tick, sc);
callout_reset(&sc->tick_ch, hz, ed_tick, sc);
}
/*
@ -622,7 +637,6 @@ ed_init_locked(struct ed_softc *sc)
static __inline void
ed_xmit(struct ed_softc *sc)
{
struct ifnet *ifp = sc->ifp;
unsigned short len;
len = sc->txb_len[sc->txb_next_tx];
@ -660,7 +674,7 @@ ed_xmit(struct ed_softc *sc)
/*
* Set a timer just in case we never hear from the board again
*/
ifp->if_timer = 2;
sc->tx_timer = 2;
}
/*
@ -1023,7 +1037,7 @@ edintr(void *arg)
/*
* clear watchdog timer
*/
ifp->if_timer = 0;
sc->tx_timer = 0;
/*
* Add in total number of collisions on last

6
sys/dev/ed/if_ed_pccard.c
View File

@ -250,7 +250,7 @@ static const struct ed_product {
*/
static int ed_pccard_probe(device_t);
static int ed_pccard_attach(device_t);
static void ed_pccard_tick(void *);
static void ed_pccard_tick(struct ed_softc *);
static int ed_pccard_dl100xx(device_t dev, const struct ed_product *);
static void ed_pccard_dl100xx_mii_reset(struct ed_softc *sc);
@ -1196,9 +1196,8 @@ ed_child_detached(device_t dev, device_t child)
}
static void
ed_pccard_tick(void *arg)
ed_pccard_tick(struct ed_softc *sc)
{
struct ed_softc *sc = arg;
struct mii_data *mii;
int media = 0;
@ -1223,7 +1222,6 @@ ed_pccard_tick(void *arg)
}
}
callout_reset(&sc->tick_ch, hz, ed_pccard_tick, sc);
}
static device_method_t ed_pccard_methods[] = {

3
sys/dev/ed/if_edvar.h
View File

@ -65,11 +65,12 @@ struct ed_softc {
void (*mii_writebits)(struct ed_softc *, u_int, int);
u_int (*mii_readbits)(struct ed_softc *, int);
struct callout tick_ch;
void (*sc_tick)(void *);
void (*sc_tick)(struct ed_softc *);
void (*readmem)(struct ed_softc *sc, bus_size_t src, uint8_t *dst,
uint16_t amount);
u_short (*sc_write_mbufs)(struct ed_softc *, struct mbuf *, bus_size_t);
int tx_timer;
int nic_offset; /* NIC (DS8390) I/O bus address offset */
int asic_offset; /* ASIC I/O bus address offset */