Date: Mon, 4 Jul 2016 07:43:40 GMT From: vincenzo@FreeBSD.org To: svn-soc-all@FreeBSD.org Subject: socsvn commit: r305711 - soc2016/vincenzo/head/sys/dev/netmap Message-ID: <201607040743.u647heah050422@socsvn.freebsd.org>
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Author: vincenzo Date: Mon Jul 4 07:43:40 2016 New Revision: 305711 URL: http://svnweb.FreeBSD.org/socsvn/?view=rev&rev=305711 Log: freebsd: introduce ptnet_drain_transmit_queue Modified: soc2016/vincenzo/head/sys/dev/netmap/if_ptnet.c Modified: soc2016/vincenzo/head/sys/dev/netmap/if_ptnet.c ============================================================================== --- soc2016/vincenzo/head/sys/dev/netmap/if_ptnet.c Mon Jul 4 07:43:30 2016 (r305710) +++ soc2016/vincenzo/head/sys/dev/netmap/if_ptnet.c Mon Jul 4 07:43:40 2016 (r305711) @@ -159,6 +159,7 @@ static int ptnet_init_locked(struct ptnet_softc *sc); static int ptnet_stop(struct ptnet_softc *sc); static int ptnet_transmit(struct ifnet *ifp, struct mbuf *m); +static int ptnet_drain_transmit_queue(struct ptnet_queue *pq); static void ptnet_qflush(struct ifnet *ifp); static void ptnet_tx_task(void *context, int pending); @@ -1181,47 +1182,32 @@ (_k)->rtail - (_h)) < (_min) static int -ptnet_transmit(struct ifnet *ifp, struct mbuf *m) +ptnet_drain_transmit_queue(struct ptnet_queue *pq) { - struct ptnet_softc *sc = ifp->if_softc; + struct ptnet_softc *sc = pq->sc; struct netmap_adapter *na = &sc->ptna_dr.hwup.up; + struct ifnet *ifp = sc->ifp; unsigned int batch_count = 0; struct ptnet_ring *ptring; struct netmap_kring *kring; struct netmap_ring *ring; struct netmap_slot *slot; - struct ptnet_queue *pq; unsigned int minspace; unsigned int head; unsigned int lim; + struct mbuf *mhead; struct mbuf *mf; int nmbuf_bytes; uint8_t *nmbuf; - DBG(device_printf(sc->dev, "transmit %p\n", m)); - - pq = sc->queues + 0; - - if (m) { - int err; - - /* Here we are called by the network stack, and not by - * by the taskqueue thread. */ - err = drbr_enqueue(ifp, pq->bufring, m); - m = NULL; /* just to stay safe */ - if (err) { - /* ENOBUFS when the bufring is full */ - RD(1, "%s: drbr_enqueue() failed %d\n", - __func__, err); - return err; - } - } - if (unlikely(!(ifp->if_drv_flags & IFF_DRV_RUNNING))) { RD(1, "Interface is down"); return ENETDOWN; } + /* Here we may be called by the network stack, or by + * by the taskqueue thread. */ + if (!PTNET_Q_TRYLOCK(pq)) { /* We failed to acquire the lock, schedule the taskqueue. */ RD(1, "Deferring TX work"); @@ -1265,8 +1251,8 @@ } } - m = drbr_peek(ifp, pq->bufring); - if (!m) { + mhead = drbr_peek(ifp, pq->bufring); + if (!mhead) { break; } @@ -1275,7 +1261,7 @@ nmbuf = NMB(na, slot); nmbuf_bytes = 0; - for (mf = m; mf; mf = mf->m_next) { + for (mf = mhead; mf; mf = mf->m_next) { uint8_t *mdata = mf->m_data; int mlen = mf->m_len; @@ -1315,7 +1301,7 @@ /* Consume the packet just processed. */ drbr_advance(ifp, pq->bufring); - m_freem(m); + m_freem(mhead); if (++batch_count == PTNET_TX_BATCH) { batch_count = 0; @@ -1333,6 +1319,28 @@ } static int +ptnet_transmit(struct ifnet *ifp, struct mbuf *m) +{ + struct ptnet_softc *sc = ifp->if_softc; + struct ptnet_queue *pq; + int err; + + DBG(device_printf(sc->dev, "transmit %p\n", m)); + + pq = sc->queues + 0; + + err = drbr_enqueue(ifp, pq->bufring, m); + if (err) { + /* ENOBUFS when the bufring is full */ + RD(1, "%s: drbr_enqueue() failed %d\n", + __func__, err); + return err; + } + + return ptnet_drain_transmit_queue(pq); +} + +static int ptnet_rx_eof(struct ptnet_queue *pq) { struct ptnet_softc *sc = pq->sc; @@ -1468,6 +1476,6 @@ struct ptnet_queue *pq = context; RD(1, "%s: pq #%u\n", __func__, pq->kring_id); - ptnet_transmit(pq->sc->ifp, NULL); + ptnet_drain_transmit_queue(pq); }
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