ixgbe_tx_queue_release_mbufs(struct ixgbe_tx_queue *txq)
{
unsigned i;
struct ixgbe_tx_entry_v *txe;
uint16_t nb_free, max_desc;
if (txq->sw_ring != NULL) {
/* release the used mbufs in sw_ring */
nb_free = txq->nb_tx_free;
max_desc = (uint16_t)(txq->nb_tx_desc - 1);
for (i = txq->tx_next_dd - (txq->tx_rs_thresh - 1);
nb_free < max_desc && i != txq->tx_tail;
i = (i + 1) & max_desc) {
txe = (struct ixgbe_tx_entry_v *)&txq->sw_ring[i];
/*
* Check for already freed packets.
* Note: ixgbe_tx_free_bufs does not NULL after free,
* so we actually have to check the reference count.
*/
if (txe->mbuf != NULL &&
rte_mbuf_refcnt_read(txe->mbuf) != 0)
rte_pktmbuf_free_seg(txe->mbuf);
}
/* reset tx_entry */
for (i = 0; i < txq->nb_tx_desc; i++) {
txe = (struct ixgbe_tx_entry_v *)&txq->sw_ring[i];
txe->mbuf = NULL;
}
}
}
uint16_t rte_mbuf_refcnt_read_export(struct rte_mbuf* m) {
return rte_mbuf_refcnt_read(m);
}
