svn commit: r344272 - stable/11/sys/dev/vmware/vmxnet3
Vincenzo Maffione
v.maffione at gmail.com
Tue Feb 19 14:49:46 UTC 2019
Il giorno mar 19 feb 2019 alle ore 15:47 Rodney W. Grimes <
freebsd at pdx.rh.cn85.dnsmgr.net> ha scritto:
> > Hi Rodney,
> >
> >
> > Il giorno mar 19 feb 2019 alle ore 15:36 Rodney W. Grimes <
> > freebsd at pdx.rh.cn85.dnsmgr.net> ha scritto:
> >
> > > > Author: vmaffione
> > > > Date: Tue Feb 19 10:07:48 2019
> > > > New Revision: 344272
> > > > URL: https://svnweb.freebsd.org/changeset/base/344272
> > > >
> > > > Log:
> > > > vmx(4): add native netmap support
> > > >
> > > > This change adds native netmap support for the vmx(4) adapter
> > > > (vmxnet3). Native support comes for free in 12, since the driver
> has
> > > been
> > > ^^^
> > > This commit is to stable/11
> > >
> >
> > Yes, this commit is meant for stable/11. Since in head vmx(4) has been
> > ported to iflib, netmap support form vmx(4)
> > is already available there through iflib.
> > In stable/11, on the other hand, vmx(4) is not using iflib, thus explicit
> > netmap support is needed (hence this commit).
> >
> >
> > >
> > > > ported to iflib. To make it minimally intrusive, the native
> support is
> > > > only enabled if vmxnet3.netmap_native is set at boot (e.g., in
> > > loader.conf).
> > > >
> > > > Tested on stable/11 running inside vmplayer.
> > > >
> > > > Submitted by: Giuseppe Lettieri <g.lettieri at iet.unipi.it>
> > > > Reviewed by: vmaffione, bryanv
> > > > Sponsored by: Sunny Valley Networks
> > > > Differential Revision: https://reviews.freebsd.org/D19104
> > >
> > > Huh? When did the vmx driver in stable/11 become iflib'ed?
> > >
> >
> > It didn't. The vmx driver has been ported to iflib in head.
>
> Ok, the wording of this commit message was very confusing,
> first it should of had a line:
> Direct commit to stable/11 as this code no longer exists in head.
>
Sorry, I did not know about this.
>
> Second,
> It would of been much clearer to not even mention the iflib
> in head and stable/12.
>
> Your first line and the one following sentance with out
> any additional details other than the fact this is a direct
> commit would of been clearer.
>
> Log:
> vmx(4): add native netmap support
>
> This change adds native netmap support for the vmx(4)
> adapter
> (vmxnet3).
>
> This is a direct commit to stable/11,
> this code does not exist in ^/head due to iflib
> converstion of vmx(4).
>
>
Sounds reasonable, thanks for the feedback!
Cheers,
Vincenzo
> >
> > Cheers,
> > Vincenzo
> >
> >
> > >
> > > >
> > > > Added:
> > > > stable/11/sys/dev/vmware/vmxnet3/vmx_netmap.h (contents, props
> > > changed)
> > > > Modified:
> > > > stable/11/sys/dev/vmware/vmxnet3/if_vmx.c
> > > >
> > > > Modified: stable/11/sys/dev/vmware/vmxnet3/if_vmx.c
> > > >
> > >
> ==============================================================================
> > > > --- stable/11/sys/dev/vmware/vmxnet3/if_vmx.c Tue Feb 19 03:46:32
> 2019
> > > (r344271)
> > > > +++ stable/11/sys/dev/vmware/vmxnet3/if_vmx.c Tue Feb 19 10:07:48
> 2019
> > > (r344272)
> > > > @@ -239,6 +239,10 @@ typedef enum {
> > > >
> > > > static void vmxnet3_barrier(struct vmxnet3_softc *,
> vmxnet3_barrier_t);
> > > >
> > > > +#ifdef DEV_NETMAP
> > > > +#include "vmx_netmap.h"
> > > > +#endif
> > > > +
> > > > /* Tunables. */
> > > > static int vmxnet3_mq_disable = 0;
> > > > TUNABLE_INT("hw.vmx.mq_disable", &vmxnet3_mq_disable);
> > > > @@ -270,6 +274,9 @@ DRIVER_MODULE(vmx, pci, vmxnet3_driver,
> > > vmxnet3_devcla
> > > >
> > > > MODULE_DEPEND(vmx, pci, 1, 1, 1);
> > > > MODULE_DEPEND(vmx, ether, 1, 1, 1);
> > > > +#ifdef DEV_NETMAP
> > > > +MODULE_DEPEND(vmx, netmap, 1, 1, 1);
> > > > +#endif
> > > >
> > > > #define VMXNET3_VMWARE_VENDOR_ID 0x15AD
> > > > #define VMXNET3_VMWARE_DEVICE_ID 0x07B0
> > > > @@ -347,6 +354,10 @@ vmxnet3_attach(device_t dev)
> > > > vmxnet3_start_taskqueue(sc);
> > > > #endif
> > > >
> > > > +#ifdef DEV_NETMAP
> > > > + vmxnet3_netmap_attach(sc);
> > > > +#endif
> > > > +
> > > > fail:
> > > > if (error)
> > > > vmxnet3_detach(dev);
> > > > @@ -390,6 +401,10 @@ vmxnet3_detach(device_t dev)
> > > > #endif
> > > > vmxnet3_free_interrupts(sc);
> > > >
> > > > +#ifdef DEV_NETMAP
> > > > + netmap_detach(ifp);
> > > > +#endif
> > > > +
> > > > if (ifp != NULL) {
> > > > if_free(ifp);
> > > > sc->vmx_ifp = NULL;
> > > > @@ -1846,6 +1861,11 @@ vmxnet3_txq_eof(struct vmxnet3_txqueue *txq)
> > > > txr = &txq->vxtxq_cmd_ring;
> > > > txc = &txq->vxtxq_comp_ring;
> > > >
> > > > +#ifdef DEV_NETMAP
> > > > + if (netmap_tx_irq(sc->vmx_ifp, txq - sc->vmx_txq) !=
> NM_IRQ_PASS)
> > > > + return;
> > > > +#endif
> > > > +
> > > > VMXNET3_TXQ_LOCK_ASSERT(txq);
> > > >
> > > > for (;;) {
> > > > @@ -2111,6 +2131,15 @@ vmxnet3_rxq_eof(struct vmxnet3_rxqueue *rxq)
> > > > ifp = sc->vmx_ifp;
> > > > rxc = &rxq->vxrxq_comp_ring;
> > > >
> > > > +#ifdef DEV_NETMAP
> > > > + {
> > > > + int dummy;
> > > > + if (netmap_rx_irq(ifp, rxq - sc->vmx_rxq, &dummy) !=
> > > > + NM_IRQ_PASS)
> > > > + return;
> > > > + }
> > > > +#endif
> > > > +
> > > > VMXNET3_RXQ_LOCK_ASSERT(rxq);
> > > >
> > > > if ((ifp->if_drv_flags & IFF_DRV_RUNNING) == 0)
> > > > @@ -2401,6 +2430,10 @@ vmxnet3_stop_rendezvous(struct vmxnet3_softc
> *sc)
> > > > struct vmxnet3_txqueue *txq;
> > > > int i;
> > > >
> > > > +#ifdef DEV_NETMAP
> > > > + netmap_disable_all_rings(sc->vmx_ifp);
> > > > +#endif
> > > > +
> > > > for (i = 0; i < sc->vmx_nrxqueues; i++) {
> > > > rxq = &sc->vmx_rxq[i];
> > > > VMXNET3_RXQ_LOCK(rxq);
> > > > @@ -2454,6 +2487,10 @@ vmxnet3_txinit(struct vmxnet3_softc *sc,
> struct
> > > vmxnet
> > > > bzero(txr->vxtxr_txd,
> > > > txr->vxtxr_ndesc * sizeof(struct vmxnet3_txdesc));
> > > >
> > > > +#ifdef DEV_NETMAP
> > > > + vmxnet3_netmap_txq_init(sc, txq);
> > > > +#endif
> > > > +
> > > > txc = &txq->vxtxq_comp_ring;
> > > > txc->vxcr_next = 0;
> > > > txc->vxcr_gen = VMXNET3_INIT_GEN;
> > > > @@ -2468,6 +2505,10 @@ vmxnet3_rxinit(struct vmxnet3_softc *sc,
> struct
> > > vmxnet
> > > > struct vmxnet3_rxring *rxr;
> > > > struct vmxnet3_comp_ring *rxc;
> > > > int i, populate, idx, frame_size, error;
> > > > +#ifdef DEV_NETMAP
> > > > + struct netmap_adapter *na;
> > > > + struct netmap_slot *slot;
> > > > +#endif
> > > >
> > > > ifp = sc->vmx_ifp;
> > > > frame_size = ETHER_ALIGN + sizeof(struct ether_vlan_header) +
> > > > @@ -2498,12 +2539,24 @@ vmxnet3_rxinit(struct vmxnet3_softc *sc,
> struct
> > > vmxnet
> > > > else
> > > > populate = VMXNET3_RXRINGS_PERQ;
> > > >
> > > > +#ifdef DEV_NETMAP
> > > > + na = NA(ifp);
> > > > + slot = netmap_reset(na, NR_RX, rxq - sc->vmx_rxq, 0);
> > > > +#endif
> > > > +
> > > > for (i = 0; i < populate; i++) {
> > > > rxr = &rxq->vxrxq_cmd_ring[i];
> > > > rxr->vxrxr_fill = 0;
> > > > rxr->vxrxr_gen = VMXNET3_INIT_GEN;
> > > > bzero(rxr->vxrxr_rxd,
> > > > rxr->vxrxr_ndesc * sizeof(struct vmxnet3_rxdesc));
> > > > +#ifdef DEV_NETMAP
> > > > + if (slot != NULL) {
> > > > + vmxnet3_netmap_rxq_init(sc, rxq, rxr, slot);
> > > > + i = populate;
> > > > + break;
> > > > + }
> > > > +#endif
> > > >
> > > > for (idx = 0; idx < rxr->vxrxr_ndesc; idx++) {
> > > > error = vmxnet3_newbuf(sc, rxr);
> > > > @@ -2625,6 +2678,10 @@ vmxnet3_init_locked(struct vmxnet3_softc *sc)
> > > >
> > > > ifp->if_drv_flags |= IFF_DRV_RUNNING;
> > > > vmxnet3_link_status(sc);
> > > > +
> > > > +#ifdef DEV_NETMAP
> > > > + netmap_enable_all_rings(ifp);
> > > > +#endif
> > > >
> > > > vmxnet3_enable_all_intrs(sc);
> > > > callout_reset(&sc->vmx_tick, hz, vmxnet3_tick, sc);
> > > >
> > > > Added: stable/11/sys/dev/vmware/vmxnet3/vmx_netmap.h
> > > >
> > >
> ==============================================================================
> > > > --- /dev/null 00:00:00 1970 (empty, because file is newly added)
> > > > +++ stable/11/sys/dev/vmware/vmxnet3/vmx_netmap.h Tue Feb 19
> > > 10:07:48 2019 (r344272)
> > > > @@ -0,0 +1,376 @@
> > > > +/*
> > > > + * Copyright (C) 2019 Universita` di Pisa.
> > > > + * Sponsored by Sunny Valley Networks.
> > > > + *
> > > > + * Redistribution and use in source and binary forms, with or
> without
> > > > + * modification, are permitted provided that the following
> conditions
> > > > + * are met:
> > > > + * 1. Redistributions of source code must retain the above copyright
> > > > + * notice, this list of conditions and the following disclaimer.
> > > > + * 2. Redistributions in binary form must reproduce the above
> copyright
> > > > + * notice, this list of conditions and the following disclaimer
> in
> > > the
> > > > + * documentation and/or other materials provided with the
> > > distribution.
> > > > + *
> > > > + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS
> IS''
> > > AND
> > > > + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
> TO, THE
> > > > + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
> PARTICULAR
> > > PURPOSE
> > > > + * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE
> > > LIABLE
> > > > + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
> > > CONSEQUENTIAL
> > > > + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
> > > GOODS
> > > > + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
> INTERRUPTION)
> > > > + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
> CONTRACT,
> > > STRICT
> > > > + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
> > > ANY WAY
> > > > + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
> POSSIBILITY
> > > OF
> > > > + * SUCH DAMAGE.
> > > > + */
> > > > +
> > > > +/* $FreeBSD$ */
> > > > +
> > > > +#include <net/netmap.h>
> > > > +#include <dev/netmap/netmap_kern.h>
> > > > +
> > > > +static int
> > > > +vmxnet3_netmap_reg(struct netmap_adapter *na, int onoff)
> > > > +{
> > > > + struct ifnet *ifp = na->ifp;
> > > > + struct vmxnet3_softc *sc = ifp->if_softc;
> > > > +
> > > > + VMXNET3_CORE_LOCK(sc);
> > > > + vmxnet3_stop(sc);
> > > > + if (onoff) {
> > > > + nm_set_native_flags(na);
> > > > + } else {
> > > > + nm_clear_native_flags(na);
> > > > + }
> > > > + vmxnet3_init_locked(sc);
> > > > + VMXNET3_CORE_UNLOCK(sc);
> > > > + return 0;
> > > > +}
> > > > +
> > > > +static void
> > > > +vmxnet3_netmap_rxq_init(struct vmxnet3_softc *sc, struct
> > > vmxnet3_rxqueue *rxq,
> > > > + struct vmxnet3_rxring *rxr, struct netmap_slot *slot)
> > > > +{
> > > > + struct ifnet *ifp = sc->vmx_ifp;
> > > > + struct netmap_adapter *na = NA(ifp);
> > > > + struct vmxnet3_rxdesc *rxd;
> > > > + int q, i;
> > > > +
> > > > + q = rxq - sc->vmx_rxq;
> > > > +
> > > > + for (i = 0; ; i++) {
> > > > + int idx = rxr->vxrxr_fill;
> > > > + int si = netmap_idx_n2k(na->rx_rings[q], idx);
> > > > + struct vmxnet3_rxbuf *rxb = &rxr->vxrxr_rxbuf[idx];
> > > > + uint64_t paddr;
> > > > + void *addr;
> > > > +
> > > > + addr = PNMB(na, slot + si, &paddr);
> > > > + netmap_load_map(na, rxr->vxrxr_rxtag, rxb->vrxb_dmamap,
> > > addr);
> > > > +
> > > > + rxd = &rxr->vxrxr_rxd[idx];
> > > > + rxd->addr = paddr;
> > > > + rxd->len = NETMAP_BUF_SIZE(na);
> > > > + rxd->gen = rxr->vxrxr_gen ^ 1;
> > > > + rxd->btype = VMXNET3_BTYPE_HEAD;
> > > > + nm_prdis("%d: addr %lx len %u btype %u gen %u",
> > > > + idx, rxd->addr, rxd->len, rxd->btype,
> rxd->gen);
> > > > +
> > > > + if (i == rxr->vxrxr_ndesc -1)
> > > > + break;
> > > > +
> > > > + rxd->gen ^= 1;
> > > > + vmxnet3_rxr_increment_fill(rxr);
> > > > + }
> > > > +}
> > > > +
> > > > +static void
> > > > +vmxnet3_netmap_txq_init(struct vmxnet3_softc *sc, struct
> > > vmxnet3_txqueue *txq)
> > > > +{
> > > > + struct ifnet *ifp = sc->vmx_ifp;
> > > > + struct netmap_adapter *na;
> > > > + struct netmap_slot *slot;
> > > > + struct vmxnet3_txring *txr;
> > > > + int i, gen, q;
> > > > +
> > > > + q = txq - sc->vmx_txq;
> > > > +
> > > > + na = NA(ifp);
> > > > +
> > > > + slot = netmap_reset(na, NR_TX, q, 0);
> > > > + if (slot == NULL)
> > > > + return;
> > > > +
> > > > + txr = &txq->vxtxq_cmd_ring;
> > > > + gen = txr->vxtxr_gen ^ 1;
> > > > +
> > > > + for (i = 0; i < txr->vxtxr_ndesc; i++) {
> > > > + int si = netmap_idx_n2k(na->tx_rings[q], i);
> > > > + struct vmxnet3_txdesc *txd = &txr->vxtxr_txd[i];
> > > > + uint64_t paddr;
> > > > + void *addr;
> > > > +
> > > > + addr = PNMB(na, slot + si, &paddr);
> > > > +
> > > > + txd->addr = paddr;
> > > > + txd->len = 0;
> > > > + txd->gen = gen;
> > > > + txd->dtype = 0;
> > > > + txd->offload_mode = VMXNET3_OM_NONE;
> > > > + txd->offload_pos = 0;
> > > > + txd->hlen = 0;
> > > > + txd->eop = 0;
> > > > + txd->compreq = 0;
> > > > + txd->vtag_mode = 0;
> > > > + txd->vtag = 0;
> > > > +
> > > > + netmap_load_map(na, txr->vxtxr_txtag,
> > > > + txr->vxtxr_txbuf[i].vtxb_dmamap, addr);
> > > > + }
> > > > +}
> > > > +
> > > > +static int
> > > > +vmxnet3_netmap_txsync(struct netmap_kring *kring, int flags)
> > > > +{
> > > > + struct netmap_adapter *na = kring->na;
> > > > + struct ifnet *ifp = na->ifp;
> > > > + struct netmap_ring *ring = kring->ring;
> > > > + u_int nm_i;
> > > > + u_int nic_i;
> > > > + u_int n;
> > > > + u_int const lim = kring->nkr_num_slots - 1;
> > > > + u_int const head = kring->rhead;
> > > > +
> > > > + /*
> > > > + * interrupts on every tx packet are expensive so request
> > > > + * them every half ring, or where NS_REPORT is set
> > > > + */
> > > > + u_int report_frequency = kring->nkr_num_slots >> 1;
> > > > + /* device specific */
> > > > + struct vmxnet3_softc *sc = ifp->if_softc;
> > > > + struct vmxnet3_txqueue *txq = &sc->vmx_txq[kring->ring_id];
> > > > + struct vmxnet3_txring *txr = &txq->vxtxq_cmd_ring;
> > > > + struct vmxnet3_comp_ring *txc = &txq->vxtxq_comp_ring;
> > > > + struct vmxnet3_txcompdesc *txcd = txc->vxcr_u.txcd;
> > > > + int gen = txr->vxtxr_gen;
> > > > +
> > > > + /* no need to dma-sync the ring; memory barriers are
> sufficient */
> > > > +
> > > > + nm_i = kring->nr_hwcur;
> > > > + if (nm_i != head) {
> > > > + nic_i = netmap_idx_k2n(kring, nm_i);
> > > > + for (n = 0; nm_i != head; n++) {
> > > > + struct netmap_slot *slot = &ring->slot[nm_i];
> > > > + u_int len = slot->len;
> > > > + uint64_t paddr;
> > > > + void *addr = PNMB(na, slot, &paddr);
> > > > + int compreq = !!(slot->flags & NS_REPORT ||
> > > > + nic_i == 0 || nic_i ==
> report_frequency);
> > > > +
> > > > + /* device specific */
> > > > + struct vmxnet3_txdesc *curr =
> > > &txr->vxtxr_txd[nic_i];
> > > > + struct vmxnet3_txbuf *txbuf =
> > > &txr->vxtxr_txbuf[nic_i];
> > > > +
> > > > + NM_CHECK_ADDR_LEN(na, addr, len);
> > > > +
> > > > + /* fill the slot in the NIC ring */
> > > > + curr->len = len;
> > > > + curr->eop = 1; /* NS_MOREFRAG not supported */
> > > > + curr->compreq = compreq;
> > > > +
> > > > + if (slot->flags & NS_BUF_CHANGED) {
> > > > + curr->addr = paddr;
> > > > + netmap_reload_map(na, txr->vxtxr_txtag,
> > > > + txbuf->vtxb_dmamap,
> addr);
> > > > + }
> > > > + slot->flags &= ~(NS_REPORT | NS_BUF_CHANGED);
> > > > +
> > > > + /* make sure changes to the buffer are synced
> */
> > > > + bus_dmamap_sync(txr->vxtxr_txtag,
> > > txbuf->vtxb_dmamap,
> > > > + BUS_DMASYNC_PREWRITE);
> > > > +
> > > > + /* pass ownership */
> > > > + vmxnet3_barrier(sc, VMXNET3_BARRIER_WR);
> > > > + curr->gen = gen;
> > > > +
> > > > + nm_i = nm_next(nm_i, lim);
> > > > + nic_i++;
> > > > + if (unlikely(nic_i == lim + 1)) {
> > > > + nic_i = 0;
> > > > + gen = txr->vxtxr_gen ^= 1;
> > > > + }
> > > > + }
> > > > +
> > > > + vmxnet3_write_bar0(sc, VMXNET3_BAR0_TXH(txq->vxtxq_id),
> > > nic_i);
> > > > + }
> > > > + kring->nr_hwcur = nm_i;
> > > > +
> > > > + /* reclaim completed packets */
> > > > + for (;;) {
> > > > + u_int sop;
> > > > + struct vmxnet3_txbuf *txb;
> > > > +
> > > > + txcd = &txc->vxcr_u.txcd[txc->vxcr_next];
> > > > + if (txcd->gen != txc->vxcr_gen)
> > > > + break;
> > > > +
> > > > + vmxnet3_barrier(sc, VMXNET3_BARRIER_RD);
> > > > +
> > > > + if (++txc->vxcr_next == txc->vxcr_ndesc) {
> > > > + txc->vxcr_next = 0;
> > > > + txc->vxcr_gen ^= 1;
> > > > + }
> > > > +
> > > > + sop = txr->vxtxr_next;
> > > > + txb = &txr->vxtxr_txbuf[sop];
> > > > +
> > > > + bus_dmamap_sync(txr->vxtxr_txtag, txb->vtxb_dmamap,
> > > > + BUS_DMASYNC_POSTWRITE);
> > > > +
> > > > + txr->vxtxr_next = (txcd->eop_idx + 1) %
> txr->vxtxr_ndesc;
> > > > + }
> > > > + kring->nr_hwtail = nm_prev(netmap_idx_n2k(kring,
> txr->vxtxr_next),
> > > lim);
> > > > +
> > > > + return 0;
> > > > +}
> > > > +
> > > > +static int
> > > > +vmxnet3_netmap_rxsync(struct netmap_kring *kring, int flags)
> > > > +{
> > > > + struct netmap_adapter *na = kring->na;
> > > > + struct netmap_ring *ring = kring->ring;
> > > > + u_int nm_i;
> > > > + u_int nic_i;
> > > > + u_int const lim = kring->nkr_num_slots - 1;
> > > > + u_int const head = kring->rhead;
> > > > + int force_update = (flags & NAF_FORCE_READ);
> > > > +
> > > > + struct ifnet *ifp = na->ifp;
> > > > + struct vmxnet3_softc *sc = ifp->if_softc;
> > > > + struct vmxnet3_rxqueue *rxq = &sc->vmx_rxq[kring->ring_id];
> > > > + struct vmxnet3_rxring *rxr;
> > > > + struct vmxnet3_comp_ring *rxc;
> > > > +
> > > > + if (head > lim)
> > > > + return netmap_ring_reinit(kring);
> > > > +
> > > > + rxr = &rxq->vxrxq_cmd_ring[0];
> > > > +
> > > > + /* no need to dma-sync the ring; memory barriers are
> sufficient */
> > > > +
> > > > + /* first part: import newly received packets */
> > > > + if (netmap_no_pendintr || force_update) {
> > > > + rxc = &rxq->vxrxq_comp_ring;
> > > > + nm_i = kring->nr_hwtail;
> > > > + nic_i = netmap_idx_k2n(kring, nm_i);
> > > > + for (;;) {
> > > > + struct vmxnet3_rxcompdesc *rxcd;
> > > > + struct vmxnet3_rxbuf *rxb;
> > > > +
> > > > + rxcd = &rxc->vxcr_u.rxcd[rxc->vxcr_next];
> > > > +
> > > > + if (rxcd->gen != rxc->vxcr_gen)
> > > > + break;
> > > > + vmxnet3_barrier(sc, VMXNET3_BARRIER_RD);
> > > > +
> > > > + while (__predict_false(rxcd->rxd_idx !=
> nic_i)) {
> > > > + nm_prlim(1, "%u skipped! idx %u",
> nic_i,
> > > rxcd->rxd_idx);
> > > > + /* to shelter the application from
> this we
> > > > + * would need to rotate the
> kernel-owned
> > > > + * portion of the netmap and nic
> rings. We
> > > > + * return len=0 for now and hope for
> the
> > > best.
> > > > + */
> > > > + ring->slot[nm_i].len = 0;
> > > > + nic_i = nm_next(nm_i, lim);
> > > > + nm_i = nm_next(nm_i, lim);
> > > > + }
> > > > +
> > > > + rxb = &rxr->vxrxr_rxbuf[nic_i];
> > > > +
> > > > + ring->slot[nm_i].len = rxcd->len;
> > > > + ring->slot[nm_i].flags = 0;
> > > > +
> > > > + bus_dmamap_sync(rxr->vxrxr_rxtag,
> rxb->vrxb_dmamap,
> > > > + BUS_DMASYNC_POSTREAD);
> > > > +
> > > > + nic_i = nm_next(nm_i, lim);
> > > > + nm_i = nm_next(nm_i, lim);
> > > > +
> > > > + rxc->vxcr_next++;
> > > > + if (__predict_false(rxc->vxcr_next ==
> > > rxc->vxcr_ndesc)) {
> > > > + rxc->vxcr_next = 0;
> > > > + rxc->vxcr_gen ^= 1;
> > > > + }
> > > > + }
> > > > + kring->nr_hwtail = nm_i;
> > > > + }
> > > > + /* second part: skip past packets that userspace has released
> */
> > > > + nm_i = kring->nr_hwcur;
> > > > + if (nm_i != head) {
> > > > + nic_i = netmap_idx_k2n(kring, nm_i);
> > > > + while (nm_i != head) {
> > > > + struct netmap_slot *slot = &ring->slot[nm_i];
> > > > + struct vmxnet3_rxdesc *rxd_fill;
> > > > + struct vmxnet3_rxbuf *rxbuf;
> > > > +
> > > > + if (slot->flags & NS_BUF_CHANGED) {
> > > > + uint64_t paddr;
> > > > + void *addr = PNMB(na, slot, &paddr);
> > > > + struct vmxnet3_rxdesc *rxd =
> > > &rxr->vxrxr_rxd[nic_i];
> > > > +
> > > > +
> > > > + if (addr == NETMAP_BUF_BASE(na))
> > > > + return
> netmap_ring_reinit(kring);
> > > > +
> > > > + rxd->addr = paddr;
> > > > + rxbuf = &rxr->vxrxr_rxbuf[nic_i];
> > > > + netmap_reload_map(na, rxr->vxrxr_rxtag,
> > > > + rxbuf->vrxb_dmamap,
> addr);
> > > > + slot->flags &= ~NS_BUF_CHANGED;
> > > > + vmxnet3_barrier(sc,
> VMXNET3_BARRIER_WR);
> > > > + }
> > > > +
> > > > + rxd_fill = &rxr->vxrxr_rxd[rxr->vxrxr_fill];
> > > > + rxbuf = &rxr->vxrxr_rxbuf[rxr->vxrxr_fill];
> > > > +
> > > > + bus_dmamap_sync(rxr->vxrxr_rxtag,
> > > rxbuf->vrxb_dmamap,
> > > > + BUS_DMASYNC_PREREAD);
> > > > +
> > > > + rxd_fill->gen = rxr->vxrxr_gen;
> > > > + vmxnet3_rxr_increment_fill(rxr);
> > > > +
> > > > + nm_i = nm_next(nm_i, lim);
> > > > + nic_i = nm_next(nic_i, lim);
> > > > + }
> > > > + kring->nr_hwcur = head;
> > > > + if (__predict_false(rxq->vxrxq_rs->update_rxhead)) {
> > > > + vmxnet3_write_bar0(sc,
> > > > + VMXNET3_BAR0_RXH1(kring->ring_id),
> > > rxr->vxrxr_fill);
> > > > + }
> > > > + }
> > > > + return 0;
> > > > +}
> > > > +
> > > > +static void
> > > > +vmxnet3_netmap_attach(struct vmxnet3_softc *sc)
> > > > +{
> > > > + struct netmap_adapter na;
> > > > + int enable = 0;
> > > > +
> > > > + if (getenv_int("vmxnet3.netmap_native", &enable) < 0 ||
> !enable) {
> > > > + return;
> > > > + }
> > > > +
> > > > + bzero(&na, sizeof(na));
> > > > +
> > > > + na.ifp = sc->vmx_ifp;
> > > > + na.na_flags = NAF_BDG_MAYSLEEP;
> > > > + na.num_tx_desc = sc->vmx_ntxdescs;
> > > > + na.num_rx_desc = sc->vmx_nrxdescs;
> > > > + na.num_tx_rings = sc->vmx_ntxqueues;
> > > > + na.num_rx_rings = sc->vmx_nrxqueues;
> > > > + na.nm_register = vmxnet3_netmap_reg;
> > > > + na.nm_txsync = vmxnet3_netmap_txsync;
> > > > + na.nm_rxsync = vmxnet3_netmap_rxsync;
> > > > + netmap_attach(&na);
> > > > +}
> > > >
> > > >
> > >
> > > --
> > > Rod Grimes
> > > rgrimes at freebsd.org
> > >
> >
> >
> > --
> > Vincenzo
>
> --
> Rod Grimes
> rgrimes at freebsd.org
>
--
Vincenzo
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