Function ixgbe_reset_rx_queue

dpdk/drivers/net/ixgbe/ixgbe_rxtx.c:2944–2993

Reset dynamic ixgbe_rx_queue fields back to defaults */

/* Reset dynamic ixgbe_rx_queue fields back to defaults */
static void __rte_cold
ixgbe_reset_rx_queue(struct ixgbe_adapter *adapter, struct ixgbe_rx_queue *rxq)
{
	static const union ixgbe_adv_rx_desc zeroed_desc = {{0}};
	unsigned i;
	uint16_t len = rxq->nb_rx_desc;

	/*
	 * By default, the Rx queue setup function allocates enough memory for
	 * IXGBE_MAX_RING_DESC.  The Rx Burst bulk allocation function requires
	 * extra memory at the end of the descriptor ring to be zero'd out.
	 */
	if (adapter->rx_bulk_alloc_allowed)
		/* zero out extra memory */
		len += RTE_PMD_IXGBE_RX_MAX_BURST;

	/*
	 * Zero out HW ring memory. Zero out extra memory at the end of
	 * the H/W ring so look-ahead logic in Rx Burst bulk alloc function
	 * reads extra memory as zeros.
	 */
	for (i = 0; i < len; i++) {
		rxq->rx_ring[i] = zeroed_desc;
	}

	/*
	 * initialize extra software ring entries. Space for these extra
	 * entries is always allocated
	 */
	memset(&rxq->fake_mbuf, 0x0, sizeof(rxq->fake_mbuf));
	for (i = rxq->nb_rx_desc; i < len; ++i) {
		rxq->sw_ring[i].mbuf = &rxq->fake_mbuf;
	}

	rxq->rx_nb_avail = 0;
	rxq->rx_next_avail = 0;
	rxq->rx_free_trigger = (uint16_t)(rxq->rx_free_thresh - 1);
	rxq->rx_tail = 0;
	rxq->nb_rx_hold = 0;

	rte_pktmbuf_free(rxq->pkt_first_seg);

	rxq->pkt_first_seg = NULL;
	rxq->pkt_last_seg = NULL;

#if defined(RTE_ARCH_X86) || defined(RTE_ARCH_ARM64)
	rxq->rxrearm_start = 0;
	rxq->rxrearm_nb = 0;
#endif
}

static int
ixgbe_is_vf(struct rte_eth_dev *dev)