diff options
| author | Yufeng Mo <moyufeng@huawei.com> | 2019-08-28 17:23:16 +0300 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2019-08-30 02:57:44 +0300 |
| commit | dd2956eab104185bda122af162f90b06322a05e6 (patch) | |
| tree | 1221fb5838dcd30833b4af58e1df32fa987ab1cc /drivers/net/ethernet/hisilicon/hns3/hns3_ethtool.c | |
| parent | 2336f19d789223b9f42f111aab8de6ad66d12c28 (diff) | |
| download | linux-dd2956eab104185bda122af162f90b06322a05e6.tar.xz | |
net: hns3: not allow SSU loopback while execute ethtool -t dev
The current loopback mode is to add 0x1F to the SMAC address
as the DMAC address and enable the promiscuous mode.
However, if the VF address is the same as the DMAC address,
the loopback test fails.
Loopback can be enabled in three places: SSU, MAC, and serdes.
By default, SSU loopback is enabled, so if the SMAC and the DMAC
are the same, the packets are looped back in the SSU. If SSU loopback
is disabled, packets can reach MAC even if SMAC is the same as DMAC.
Therefore, this patch disables the SSU loopback before the loopback
test. In this way, the SMAC and DMAC can be the same, and the
promiscuous mode does not need to be enabled. And this is not
valid in version 0x20.
This patch also uses a macro to replace 0x1F.
Fixes: c39c4d98dc65 ("net: hns3: Add mac loopback selftest support in hns3 driver")
Signed-off-by: Yufeng Mo <moyufeng@huawei.com>
Reviewed-by: Peng Li <lipeng321@huawei.com>
Signed-off-by: Huazhong Tan <tanhuazhong@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/ethernet/hisilicon/hns3/hns3_ethtool.c')
| -rw-r--r-- | drivers/net/ethernet/hisilicon/hns3/hns3_ethtool.c | 9 |
1 files changed, 7 insertions, 2 deletions
diff --git a/drivers/net/ethernet/hisilicon/hns3/hns3_ethtool.c b/drivers/net/ethernet/hisilicon/hns3/hns3_ethtool.c index e219bb1c95b0..c52eccc1621d 100644 --- a/drivers/net/ethernet/hisilicon/hns3/hns3_ethtool.c +++ b/drivers/net/ethernet/hisilicon/hns3/hns3_ethtool.c @@ -97,7 +97,7 @@ static int hns3_lp_setup(struct net_device *ndev, enum hnae3_loop loop, bool en) break; } - if (ret) + if (ret || h->pdev->revision >= 0x21) return ret; if (en) { @@ -144,7 +144,10 @@ static int hns3_lp_down(struct net_device *ndev, enum hnae3_loop loop_mode) static void hns3_lp_setup_skb(struct sk_buff *skb) { +#define HNS3_NIC_LB_DST_MAC_ADDR 0x1f + struct net_device *ndev = skb->dev; + struct hnae3_handle *handle; unsigned char *packet; struct ethhdr *ethh; unsigned int i; @@ -160,7 +163,9 @@ static void hns3_lp_setup_skb(struct sk_buff *skb) * before the packet reaches mac or serdes, which will defect * the purpose of mac or serdes selftest. */ - ethh->h_dest[5] += 0x1f; + handle = hns3_get_handle(ndev); + if (handle->pdev->revision == 0x20) + ethh->h_dest[5] += HNS3_NIC_LB_DST_MAC_ADDR; eth_zero_addr(ethh->h_source); ethh->h_proto = htons(ETH_P_ARP); skb_reset_mac_header(skb); |