net: hns3: optimize the barrier using when cleaning TX BD (ce74370c) · Commits · 戴 / test

drivers/net/ethernet/hisilicon/hns3/hns3_enet.c

+15 −14

Original line number	Diff line number	Diff line
		@@ -2186,12 +2186,13 @@ static void hns3_reuse_buffer(struct hns3_enet_ring *ring, int i)
		ring->desc[i].rx.bd_base_info = 0;
		}

		static void hns3_nic_reclaim_one_desc(struct hns3_enet_ring ring, int bytes,
		int *pkts)
		static void hns3_nic_reclaim_desc(struct hns3_enet_ring *ring, int head,
		int bytes, int pkts)
		{
		int ntc = ring->next_to_clean;
		struct hns3_desc_cb *desc_cb;

		while (head != ntc) {
		desc_cb = &ring->desc_cb[ntc];
		(*pkts) += (desc_cb->type == DESC_TYPE_SKB);
		(*bytes) += desc_cb->length;
		@@ -2201,6 +2202,10 @@ static void hns3_nic_reclaim_one_desc(struct hns3_enet_ring ring, int bytes,
		if (++ntc == ring->desc_num)
		ntc = 0;

		/* Issue prefetch for next Tx descriptor */
		prefetch(&ring->desc_cb[ntc]);
		}

		/* This smp_store_release() pairs with smp_load_acquire() in
		* ring_space called by hns3_nic_net_xmit.
		*/
		@@ -2244,11 +2249,7 @@ void hns3_clean_tx_ring(struct hns3_enet_ring *ring)

		bytes = 0;
		pkts = 0;
		while (head != ring->next_to_clean) {
		hns3_nic_reclaim_one_desc(ring, &bytes, &pkts);
		/* Issue prefetch for next Tx descriptor */
		prefetch(&ring->desc_cb[ring->next_to_clean]);
		}
		hns3_nic_reclaim_desc(ring, head, &bytes, &pkts);

		ring->tqp_vector->tx_group.total_bytes += bytes;
		ring->tqp_vector->tx_group.total_packets += pkts;