/*
** Multiqueue Transmit driver
**
*/
int
ixl_mq_start(struct ifnet *ifp, struct mbuf *m)
{
struct ixl_vsi *vsi = ifp->if_softc;
struct ixl_queue *que;
struct tx_ring *txr;
int err, i;
/* Which queue to use */
if ((m->m_flags & M_FLOWID) != 0)
i = m->m_pkthdr.flowid % vsi->num_queues;
else
i = curcpu % vsi->num_queues;
/* Check for a hung queue and pick alternative */
if (((1 << i) & vsi->active_queues) == 0)
i = ffsl(vsi->active_queues);
que = &vsi->queues[i];
txr = &que->txr;
err = drbr_enqueue(ifp, txr->br, m);
if (err)
return(err);
if (IXL_TX_TRYLOCK(txr)) {
ixl_mq_start_locked(ifp, txr);
IXL_TX_UNLOCK(txr);
} else
taskqueue_enqueue(que->tq, &que->tx_task);
return (0);
}
static int
nicvf_if_transmit(struct ifnet *ifp, struct mbuf *mbuf)
{
struct nicvf *nic = if_getsoftc(ifp);
struct queue_set *qs = nic->qs;
struct snd_queue *sq;
struct mbuf *mtmp;
int qidx;
int err = 0;
if (__predict_false(qs == NULL)) {
panic("%s: missing queue set for %s", __func__,
device_get_nameunit(nic->dev));
}
/* Select queue */
if (M_HASHTYPE_GET(mbuf) != M_HASHTYPE_NONE)
qidx = mbuf->m_pkthdr.flowid % qs->sq_cnt;
else
qidx = curcpu % qs->sq_cnt;
sq = &qs->sq[qidx];
if (mbuf->m_next != NULL &&
(mbuf->m_pkthdr.csum_flags &
(CSUM_IP | CSUM_TCP | CSUM_UDP | CSUM_SCTP)) != 0) {
if (M_WRITABLE(mbuf) == 0) {
mtmp = m_dup(mbuf, M_NOWAIT);
m_freem(mbuf);
if (mtmp == NULL)
return (ENOBUFS);
mbuf = mtmp;
}
}
err = drbr_enqueue(ifp, sq->br, mbuf);
if (((if_getdrvflags(ifp) & (IFF_DRV_RUNNING | IFF_DRV_OACTIVE)) !=
IFF_DRV_RUNNING) || !nic->link_up || (err != 0)) {
/*
* Try to enqueue packet to the ring buffer.
* If the driver is not active, link down or enqueue operation
* failed, return with the appropriate error code.
*/
return (err);
}
if (NICVF_TX_TRYLOCK(sq) != 0) {
err = nicvf_xmit_locked(sq);
NICVF_TX_UNLOCK(sq);
return (err);
} else
taskqueue_enqueue(sq->snd_taskq, &sq->snd_task);
return (0);
}
