/* * The TOE wants an L2 table entry that it can use to reach the next hop over * the specified port. Produce such an entry - create one if needed. * * Note that the ifnet could be a pseudo-device like if_vlan, if_lagg, etc. on * top of the real cxgbe interface. */ struct l2t_entry * t4_l2t_get(struct port_info *pi, struct ifnet *ifp, struct sockaddr *sa) { struct l2t_entry *e; struct adapter *sc = pi->adapter; struct l2t_data *d = sc->l2t; u_int hash, smt_idx = pi->port_id; KASSERT(sa->sa_family == AF_INET || sa->sa_family == AF_INET6, ("%s: sa %p has unexpected sa_family %d", __func__, sa, sa->sa_family)); #ifndef VLAN_TAG if (ifp->if_type == IFT_L2VLAN) return (NULL); #endif hash = l2_hash(d, sa, ifp->if_index); rw_wlock(&d->lock); for (e = d->l2tab[hash].first; e; e = e->next) { if (l2_cmp(sa, e) == 0 && e->ifp == ifp && e->smt_idx == smt_idx) { l2t_hold(d, e); goto done; } } /* Need to allocate a new entry */ e = t4_alloc_l2e(d); if (e) { mtx_lock(&e->lock); /* avoid race with t4_l2t_free */ e->next = d->l2tab[hash].first; d->l2tab[hash].first = e; e->state = L2T_STATE_RESOLVING; l2_store(sa, e); e->ifp = ifp; e->smt_idx = smt_idx; e->hash = hash; e->lport = pi->lport; e->wrq = &sc->sge.ctrlq[pi->port_id]; e->iqid = sc->sge.ofld_rxq[pi->vi[0].first_ofld_rxq].iq.abs_id; atomic_store_rel_int(&e->refcnt, 1); #ifdef VLAN_TAG if (ifp->if_type == IFT_L2VLAN) VLAN_TAG(ifp, &e->vlan); else e->vlan = VLAN_NONE; #endif mtx_unlock(&e->lock); } done: rw_wunlock(&d->lock); return e; }
struct l2t_entry *t3_l2t_get(struct t3cdev *cdev, struct neighbour *neigh, struct net_device *dev) { struct l2t_entry *e; struct l2t_data *d = L2DATA(cdev); u32 addr = *(u32 *) neigh->primary_key; int ifidx = neigh->dev->ifindex; int hash = arp_hash(addr, ifidx, d); struct port_info *p = netdev_priv(dev); int smt_idx = p->port_id; write_lock_bh(&d->lock); for (e = d->l2tab[hash].first; e; e = e->next) if (e->addr == addr && e->ifindex == ifidx && e->smt_idx == smt_idx) { l2t_hold(d, e); if (atomic_read(&e->refcnt) == 1) reuse_entry(e, neigh); goto done; } /* Need to allocate a new entry */ e = alloc_l2e(d); if (e) { spin_lock(&e->lock); /* avoid race with t3_l2t_free */ e->next = d->l2tab[hash].first; d->l2tab[hash].first = e; e->state = L2T_STATE_RESOLVING; e->addr = addr; e->ifindex = ifidx; e->smt_idx = smt_idx; atomic_set(&e->refcnt, 1); neigh_replace(e, neigh); if (neigh->dev->priv_flags & IFF_802_1Q_VLAN) e->vlan = vlan_dev_vlan_id(neigh->dev); else e->vlan = VLAN_NONE; spin_unlock(&e->lock); } done: write_unlock_bh(&d->lock); return e; }