void
cxgb_offload_deactivate(struct adapter *adapter)
{
struct t3cdev *tdev = &adapter->tdev;
struct t3c_data *t = T3C_DATA(tdev);
printf("removing adapter %p\n", adapter);
remove_adapter(adapter);
if (TAILQ_EMPTY(&adapter_list)) {
#if defined(CONFIG_CHELSIO_T3_MODULE)
restore_arp_sans_t3core();
#endif
}
free_tid_maps(&t->tid_maps);
T3C_DATA(tdev) = NULL;
t3_free_l2t(L2DATA(tdev));
L2DATA(tdev) = NULL;
mtx_destroy(&t->tid_release_lock);
free(t, M_CXGB);
}
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;
}
/*
* Called when the host's ARP layer makes a change to some entry that is
* loaded into the HW L2 table.
*/
void t3_l2t_update(struct t3cdev *dev, struct neighbour *neigh)
{
struct l2t_entry *e;
struct sk_buff *arpq = NULL;
struct l2t_data *d = L2DATA(dev);
u32 addr = *(u32 *) neigh->primary_key;
int ifidx = neigh->dev->ifindex;
int hash = arp_hash(addr, ifidx, d);
read_lock_bh(&d->lock);
for (e = d->l2tab[hash].first; e; e = e->next)
if (e->addr == addr && e->ifindex == ifidx) {
spin_lock(&e->lock);
goto found;
}
read_unlock_bh(&d->lock);
return;
found:
read_unlock(&d->lock);
if (atomic_read(&e->refcnt)) {
if (neigh != e->neigh)
neigh_replace(e, neigh);
if (e->state == L2T_STATE_RESOLVING) {
if (neigh->nud_state & NUD_FAILED) {
arpq = e->arpq_head;
e->arpq_head = e->arpq_tail = NULL;
} else if (neigh->nud_state & (NUD_CONNECTED|NUD_STALE))
setup_l2e_send_pending(dev, NULL, e);
} else {
e->state = neigh->nud_state & NUD_CONNECTED ?
L2T_STATE_VALID : L2T_STATE_STALE;
if (memcmp(e->dmac, neigh->ha, 6))
setup_l2e_send_pending(dev, NULL, e);
}
}
spin_unlock_bh(&e->lock);
if (arpq)
handle_failed_resolution(dev, arpq);
}
int
cxgb_offload_activate(struct adapter *adapter)
{
struct t3cdev *dev = &adapter->tdev;
int natids, err;
struct t3c_data *t;
struct tid_range stid_range, tid_range;
struct mtutab mtutab;
unsigned int l2t_capacity;
t = malloc(sizeof(*t), M_CXGB, M_NOWAIT|M_ZERO);
if (!t)
return (ENOMEM);
dev->adapter = adapter;
err = (EOPNOTSUPP);
if (dev->ctl(dev, GET_TX_MAX_CHUNK, &t->tx_max_chunk) < 0 ||
dev->ctl(dev, GET_MAX_OUTSTANDING_WR, &t->max_wrs) < 0 ||
dev->ctl(dev, GET_L2T_CAPACITY, &l2t_capacity) < 0 ||
dev->ctl(dev, GET_MTUS, &mtutab) < 0 ||
dev->ctl(dev, GET_TID_RANGE, &tid_range) < 0 ||
dev->ctl(dev, GET_STID_RANGE, &stid_range) < 0) {
device_printf(adapter->dev, "%s: dev->ctl check failed\n", __FUNCTION__);
goto out_free;
}
err = (ENOMEM);
L2DATA(dev) = t3_init_l2t(l2t_capacity);
if (!L2DATA(dev)) {
device_printf(adapter->dev, "%s: t3_init_l2t failed\n", __FUNCTION__);
goto out_free;
}
natids = min(tid_range.num / 2, MAX_ATIDS);
err = init_tid_tabs(&t->tid_maps, tid_range.num, natids,
stid_range.num, ATID_BASE, stid_range.base);
if (err) {
device_printf(adapter->dev, "%s: init_tid_tabs failed\n", __FUNCTION__);
goto out_free_l2t;
}
t->mtus = mtutab.mtus;
t->nmtus = mtutab.size;
TASK_INIT(&t->tid_release_task, 0 /* XXX? */, t3_process_tid_release_list, dev);
mtx_init(&t->tid_release_lock, "tid release", NULL, MTX_DUPOK|MTX_DEF);
t->dev = dev;
T3C_DATA (dev) = t;
dev->recv = process_rx;
dev->arp_update = t3_l2t_update;
/* Register netevent handler once */
if (TAILQ_EMPTY(&adapter_list)) {
#if defined(CONFIG_CHELSIO_T3_MODULE)
if (prepare_arp_with_t3core())
log(LOG_ERR, "Unable to set offload capabilities\n");
#endif
}
CTR1(KTR_CXGB, "adding adapter %p", adapter);
add_adapter(adapter);
device_printf(adapter->dev, "offload started\n");
adapter->flags |= CXGB_OFLD_INIT;
return (0);
out_free_l2t:
t3_free_l2t(L2DATA(dev));
L2DATA(dev) = NULL;
out_free:
free(t, M_CXGB);
return (err);
}