hinic: add self test support

add support to excute internal and external loopback test with
ethtool -t cmd.

Signed-off-by: Luo bin <luobin9@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 39 insertions, 0 deletions

diff --git a/drivers/net/ethernet/huawei/hinic/hinic_rx.c b/drivers/net/ethernet/huawei/hinic/hinic_rx.c
index c9a65a1f0347..5bee951fe9d4 100644
--- a/drivers/net/ethernet/huawei/hinic/hinic_rx.c
+++ b/drivers/net/ethernet/huawei/hinic/hinic_rx.c
@@ -316,6 +316,39 @@ static int rx_recv_jumbo_pkt(struct hinic_rxq *rxq, struct sk_buff *head_skb,
 	return num_wqes;
 }
 
+static void hinic_copy_lp_data(struct hinic_dev *nic_dev,
+			       struct sk_buff *skb)
+{
+	struct net_device *netdev = nic_dev->netdev;
+	u8 *lb_buf = nic_dev->lb_test_rx_buf;
+	int lb_len = nic_dev->lb_pkt_len;
+	int pkt_offset, frag_len, i;
+	void *frag_data = NULL;
+
+	if (nic_dev->lb_test_rx_idx == LP_PKT_CNT) {
+		nic_dev->lb_test_rx_idx = 0;
+		netif_warn(nic_dev, drv, netdev, "Loopback test warning, receive too more test pkts\n");
+	}
+
+	if (skb->len != nic_dev->lb_pkt_len) {
+		netif_warn(nic_dev, drv, netdev, "Wrong packet length\n");
+		nic_dev->lb_test_rx_idx++;
+		return;
+	}
+
+	pkt_offset = nic_dev->lb_test_rx_idx * lb_len;
+	frag_len = (int)skb_headlen(skb);
+	memcpy(lb_buf + pkt_offset, skb->data, frag_len);
+	pkt_offset += frag_len;
+	for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) {
+		frag_data = skb_frag_address(&skb_shinfo(skb)->frags[i]);
+		frag_len = (int)skb_frag_size(&skb_shinfo(skb)->frags[i]);
+		memcpy((lb_buf + pkt_offset), frag_data, frag_len);
+		pkt_offset += frag_len;
+	}
+	nic_dev->lb_test_rx_idx++;
+}
+
 /**
  * rxq_recv - Rx handler
  * @rxq: rx queue
@@ -330,6 +363,7 @@ static int rxq_recv(struct hinic_rxq *rxq, int budget)
 	u64 pkt_len = 0, rx_bytes = 0;
 	struct hinic_rq *rq = rxq->rq;
 	struct hinic_rq_wqe *rq_wqe;
+	struct hinic_dev *nic_dev;
 	unsigned int free_wqebbs;
 	struct hinic_rq_cqe *cqe;
 	int num_wqes, pkts = 0;
@@ -342,6 +376,8 @@ static int rxq_recv(struct hinic_rxq *rxq, int budget)
 	u32 vlan_len;
 	u16 vid;
 
+	nic_dev = netdev_priv(netdev);
+
 	while (pkts < budget) {
 		num_wqes = 0;
 
@@ -384,6 +420,9 @@ static int rxq_recv(struct hinic_rxq *rxq, int budget)
 			__vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), vid);
 		}
 
+		if (unlikely(nic_dev->flags & HINIC_LP_TEST))
+			hinic_copy_lp_data(nic_dev, skb);
+
 		skb_record_rx_queue(skb, qp->q_id);
 		skb->protocol = eth_type_trans(skb, rxq->netdev);