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hyperv/hn: Consolidate hn_init() and hn_stop()

Browse Source 
MFC after:	1 week
Sponsored by:	Microsoft
Differential Revision:	https://reviews.freebsd.org/D8056
This commit is contained in:
Sepherosa Ziehau 2016-09-29 05:01:20 +00:00
parent 2f8350c30f
commit e77ed95960
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=306432
1 changed files with 39 additions and 30 deletions
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69
sys/dev/hyperv/netvsc/hv_netvsc_drv_freebsd.c
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@ -349,6 +349,8 @@ static void hn_synth_detach(struct hn_softc *);
static bool hn_tx_ring_pending(struct hn_tx_ring *);
static void hn_suspend(struct hn_softc *);
static void hn_resume(struct hn_softc *);
static void hn_rx_drain(struct vmbus_channel *);
static void hn_tx_resume(struct hn_softc *, int);
static void hn_tx_ring_qflush(struct hn_tx_ring *);
static void hn_nvs_handle_notify(struct hn_softc *sc,
@ -1773,25 +1775,19 @@ hn_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data)
static void
hn_stop(struct hn_softc *sc)
{
struct ifnet *ifp;
struct ifnet *ifp = sc->hn_ifp;
int i;
HN_LOCK_ASSERT(sc);
ifp = sc->hn_ifp;
/* Clear RUNNING bit _before_ hn_suspend() */
atomic_clear_int(&ifp->if_drv_flags, IFF_DRV_RUNNING);
hn_suspend(sc);
if (bootverbose)
printf(" Closing Device ...\n");
atomic_clear_int(&ifp->if_drv_flags,
(IFF_DRV_RUNNING | IFF_DRV_OACTIVE));
/* Clear OACTIVE bit. */
atomic_clear_int(&ifp->if_drv_flags, IFF_DRV_OACTIVE);
for (i = 0; i < sc->hn_tx_ring_inuse; ++i)
sc->hn_tx_ring[i].hn_oactive = 0;
if_link_state_change(ifp, LINK_STATE_DOWN);
/* Disable RX by clearing RX filter. */
hn_rndis_set_rxfilter(sc, 0);
}
/*
@ -1855,27 +1851,29 @@ hn_start_txeof(struct hn_tx_ring *txr)
static void
hn_init_locked(struct hn_softc *sc)
{
struct ifnet *ifp;
int ret, i;
struct ifnet *ifp = sc->hn_ifp;
int i;
HN_LOCK_ASSERT(sc);
ifp = sc->hn_ifp;
if (ifp->if_drv_flags & IFF_DRV_RUNNING) {
if (ifp->if_drv_flags & IFF_DRV_RUNNING)
return;
}
/* TODO: add hn_rx_filter */
ret = hn_rndis_set_rxfilter(sc, NDIS_PACKET_TYPE_PROMISCUOUS);
if (ret != 0)
return;
hn_rndis_set_rxfilter(sc, NDIS_PACKET_TYPE_PROMISCUOUS);
/* Clear OACTIVE bit. */
atomic_clear_int(&ifp->if_drv_flags, IFF_DRV_OACTIVE);
for (i = 0; i < sc->hn_tx_ring_inuse; ++i)
sc->hn_tx_ring[i].hn_oactive = 0;
/* Clear TX 'suspended' bit. */
hn_tx_resume(sc, sc->hn_tx_ring_inuse);
/* Everything is ready; unleash! */
atomic_set_int(&ifp->if_drv_flags, IFF_DRV_RUNNING);
/* TODO: check RNDIS link status. */
if_link_state_change(ifp, LINK_STATE_UP);
}
@ -3587,10 +3585,26 @@ hn_suspend(struct hn_softc *sc)
vmbus_subchan_rel(subch, nsubch);
}
static void
hn_tx_resume(struct hn_softc *sc, int tx_ring_cnt)
{
int i;
KASSERT(tx_ring_cnt <= sc->hn_tx_ring_cnt,
("invalid TX ring count %d", tx_ring_cnt));
for (i = 0; i < tx_ring_cnt; ++i) {
struct hn_tx_ring *txr = &sc->hn_tx_ring[i];
mtx_lock(&txr->hn_tx_lock);
txr->hn_suspended = 0;
mtx_unlock(&txr->hn_tx_lock);
}
}
static void
hn_resume(struct hn_softc *sc)
{
struct hn_tx_ring *txr;
int i;
HN_LOCK_ASSERT(sc);
@ -3605,13 +3619,7 @@ hn_resume(struct hn_softc *sc)
* Make sure to clear suspend status on "all" TX rings,
* since hn_tx_ring_inuse can be changed after hn_suspend().
*/
for (i = 0; i < sc->hn_tx_ring_cnt; ++i) {
txr = &sc->hn_tx_ring[i];
mtx_lock(&txr->hn_tx_lock);
txr->hn_suspended = 0;
mtx_unlock(&txr->hn_tx_lock);
}
hn_tx_resume(sc, sc->hn_tx_ring_cnt);
if (!hn_use_if_start) {
/*
@ -3626,7 +3634,8 @@ hn_resume(struct hn_softc *sc)
* Kick start TX.
*/
for (i = 0; i < sc->hn_tx_ring_inuse; ++i) {
txr = &sc->hn_tx_ring[i];
struct hn_tx_ring *txr = &sc->hn_tx_ring[i];
/*
* Use txeof task, so that any pending oactive can be
* cleared properly.