reclaim_tx_descs
static u_int reclaim_tx_descs(struct sge_txq *, u_int);
reclaim_tx_descs(txq, eq->sidx);
avail += reclaim_tx_descs(txq, 64);
avail += reclaim_tx_descs(txq, min(n, 32));
avail += reclaim_tx_descs(txq, 32);
reclaim_tx_descs(txq, 32);
reclaim_tx_descs(txq, 32);
n = reclaim_tx_descs(txq, 32);