mii_bus problem
Hans Petter Selasky
hselasky at c2i.net
Fri Jan 12 14:37:41 UTC 2007
Hi,
Can someone here explain from where I can call "mii_pollstat()". I read
somewhere on the internet that I cannot call this function from the so called
"tick" routine, where "mii_tick()" is called. I currently have the following
code:
static void
aue_cfg_tick(struct aue_softc *sc,
struct aue_config_copy *cc, u_int16_t refcount)
{
printf("%s:%d\n", __FUNCTION__, __LINE__);
struct ifnet * ifp = sc->sc_ifp;
struct mii_data * mii = GET_MII(sc);
if ((cc == NULL) ||
(ifp == NULL) ||
(mii == NULL)) {
/* not ready */
return;
}
mii_tick(mii);
mii_pollstat(mii);
if ((sc->sc_flags & AUE_FLAG_WAIT_LINK) &&
(mii->mii_media_status & IFM_ACTIVE) &&
(IFM_SUBTYPE(mii->mii_media_active) != IFM_NONE)) {
sc->sc_flags &= ~AUE_FLAG_WAIT_LINK;
}
sc->sc_media_active = mii->mii_media_active;
sc->sc_media_status = mii->mii_media_status;
/* start stopped transfers, if any */
aue_start_transfers(sc);
return;
}
But after this function returns, the kernel corrupts, and it pagefaults in the
"swi6 taskqueue". Commenting out "mii_pollstat()" fixes the kernel panic.
My ifmedia status callback looks like this:
static void
aue_ifmedia_sts_cb(struct ifnet *ifp, struct ifmediareq *ifmr)
{
printf("%s:%d\n", __FUNCTION__, __LINE__);
struct aue_softc *sc = ifp->if_softc;
mtx_lock(&(sc->sc_mtx));
//mii_pollstat(mii); I don't want this here hence it sleeps!
ifmr->ifm_active = sc->sc_media_active;
ifmr->ifm_status = sc->sc_media_status;
mtx_unlock(&(sc->sc_mtx));
return;
}
The question is, is it at all possible to poll the MII status outside the
ifmedia status callback ? And if yes, how?
Thanks
--HPS
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