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net: hns3: Fix for rx vlan id handle to support Rev 0x21 hardware 

In revision 0x20, we use vlan id != 0 to check whether a vlan tag
has been offloaded, so vlan id 0 is not supported.

In revision 0x21, rx buffer descriptor adds two bits to indicate
whether one or more vlan tags have been offloaded, so vlan id 0
is valid now.

This patch seperates the handle for vlan id 0, add vlan id 0 support
for revision 0x21.

Fixes: 5b5455a9ed ("net: hns3: Add STRP_TAGP field support for hardware revision 0x21")
Signed-off-by: Jian Shen <shenjian15@huawei.com>
Signed-off-by: Salil Mehta <salil.mehta@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Jian Shen 2018-10-05 18:03:29 +01:00 committed by David S. Miller
parent 64d114f0a7
commit 701a6d6ac7
1 changed files with 13 additions and 17 deletions
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30
drivers/net/ethernet/hisilicon/hns3/hns3_enet.c
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@ -2200,18 +2200,18 @@ static void hns3_rx_skb(struct hns3_enet_ring *ring, struct sk_buff *skb)
napi_gro_receive(&ring->tqp_vector->napi, skb);
}
static u16 hns3_parse_vlan_tag(struct hns3_enet_ring *ring,
struct hns3_desc *desc, u32 l234info)
static bool hns3_parse_vlan_tag(struct hns3_enet_ring *ring,
struct hns3_desc *desc, u32 l234info,
u16 *vlan_tag)
{
struct pci_dev *pdev = ring->tqp->handle->pdev;
u16 vlan_tag;
if (pdev->revision == 0x20) {
vlan_tag = le16_to_cpu(desc->rx.ot_vlan_tag);
if (!(vlan_tag & VLAN_VID_MASK))
vlan_tag = le16_to_cpu(desc->rx.vlan_tag);
*vlan_tag = le16_to_cpu(desc->rx.ot_vlan_tag);
if (!(*vlan_tag & VLAN_VID_MASK))
*vlan_tag = le16_to_cpu(desc->rx.vlan_tag);
return vlan_tag;
return (*vlan_tag != 0);
}
#define HNS3_STRP_OUTER_VLAN 0x1
@ -2220,17 +2220,14 @@ static u16 hns3_parse_vlan_tag(struct hns3_enet_ring *ring,
switch (hnae3_get_field(l234info, HNS3_RXD_STRP_TAGP_M,
HNS3_RXD_STRP_TAGP_S)) {
case HNS3_STRP_OUTER_VLAN:
vlan_tag = le16_to_cpu(desc->rx.ot_vlan_tag);
break;
*vlan_tag = le16_to_cpu(desc->rx.ot_vlan_tag);
return true;
case HNS3_STRP_INNER_VLAN:
vlan_tag = le16_to_cpu(desc->rx.vlan_tag);
break;
*vlan_tag = le16_to_cpu(desc->rx.vlan_tag);
return true;
default:
vlan_tag = 0;
break;
return false;
}
return vlan_tag;
}
static int hns3_handle_rx_bd(struct hns3_enet_ring *ring,
@ -2332,8 +2329,7 @@ static int hns3_handle_rx_bd(struct hns3_enet_ring *ring,
if (netdev->features & NETIF_F_HW_VLAN_CTAG_RX) {
u16 vlan_tag;
vlan_tag = hns3_parse_vlan_tag(ring, desc, l234info);
if (vlan_tag & VLAN_VID_MASK)
if (hns3_parse_vlan_tag(ring, desc, l234info, &vlan_tag))
__vlan_hwaccel_put_tag(skb,
htons(ETH_P_8021Q),
vlan_tag);