| Message ID | 1686163058-25469-1-git-send-email-haiyangz@microsoft.com (mailing list archive) |
|---|---|
| State | Superseded |
| Headers | show |
| Series | [net-next] net: mana: Add support for vlan tagging | expand |
> -----Original Message----- > From: LKML haiyangz <lkmlhyz@microsoft.com> On Behalf Of Haiyang Zhang > Sent: Wednesday, June 7, 2023 2:38 PM > To: linux-hyperv@vger.kernel.org; netdev@vger.kernel.org > Cc: Haiyang Zhang <haiyangz@microsoft.com>; Dexuan Cui > <decui@microsoft.com>; KY Srinivasan <kys@microsoft.com>; Paul Rosswurm > <paulros@microsoft.com>; olaf@aepfle.de; vkuznets@redhat.com; > davem@davemloft.net; wei.liu@kernel.org; edumazet@google.com; > kuba@kernel.org; pabeni@redhat.com; leon@kernel.org; Long Li > <longli@microsoft.com>; ssengar@linux.microsoft.com; linux- > rdma@vger.kernel.org; daniel@iogearbox.net; john.fastabend@gmail.com; > bpf@vger.kernel.org; ast@kernel.org; Ajay Sharma > <sharmaajay@microsoft.com>; hawk@kernel.org; tglx@linutronix.de; > shradhagupta@linux.microsoft.com; linux-kernel@vger.kernel.org > Subject: [PATCH net-next] net: mana: Add support for vlan tagging > > To support vlan, use MANA_LONG_PKT_FMT if vlan tag is present in TX > skb. Then extract the vlan tag from the skb struct or the frame, and > save it to tx_oob for the NIC to transmit. > > For RX, extract the vlan tag from CQE and put it into skb. > > Signed-off-by: Haiyang Zhang <haiyangz@microsoft.com> > --- > drivers/net/ethernet/microsoft/mana/mana_en.c | 36 > +++++++++++++++++-- > 1 file changed, 34 insertions(+), 2 deletions(-) > > diff --git a/drivers/net/ethernet/microsoft/mana/mana_en.c > b/drivers/net/ethernet/microsoft/mana/mana_en.c > index d907727c7b7a..1d76ac66908c 100644 > --- a/drivers/net/ethernet/microsoft/mana/mana_en.c > +++ b/drivers/net/ethernet/microsoft/mana/mana_en.c > @@ -179,6 +179,31 @@ netdev_tx_t mana_start_xmit(struct sk_buff *skb, > struct net_device *ndev) > pkg.tx_oob.s_oob.short_vp_offset = txq->vp_offset; > } > > + /* When using AF_PACKET we need to move VLAN header from > + * the frame to the SKB struct to allow the NIC to xmit > + * the 802.1Q packet. > + */ > + if (skb->protocol == htons(ETH_P_8021Q)) { > + u16 vlan_tci; > + > + skb_reset_mac_header(skb); > + if (eth_type_vlan(eth_hdr(skb)->h_proto)) { > + if (unlikely(__skb_vlan_pop(skb, &vlan_tci))) > + goto tx_drop_count; > + > + __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), > + vlan_tci); > + } > + } Not necessary to extract inband tag, because our NIC accepts inband tags too. The change is in the next version.
diff --git a/drivers/net/ethernet/microsoft/mana/mana_en.c b/drivers/net/ethernet/microsoft/mana/mana_en.c index d907727c7b7a..1d76ac66908c 100644 --- a/drivers/net/ethernet/microsoft/mana/mana_en.c +++ b/drivers/net/ethernet/microsoft/mana/mana_en.c @@ -179,6 +179,31 @@ netdev_tx_t mana_start_xmit(struct sk_buff *skb, struct net_device *ndev) pkg.tx_oob.s_oob.short_vp_offset = txq->vp_offset; } + /* When using AF_PACKET we need to move VLAN header from + * the frame to the SKB struct to allow the NIC to xmit + * the 802.1Q packet. + */ + if (skb->protocol == htons(ETH_P_8021Q)) { + u16 vlan_tci; + + skb_reset_mac_header(skb); + if (eth_type_vlan(eth_hdr(skb)->h_proto)) { + if (unlikely(__skb_vlan_pop(skb, &vlan_tci))) + goto tx_drop_count; + + __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), + vlan_tci); + } + } + + if (skb_vlan_tag_present(skb)) { + pkt_fmt = MANA_LONG_PKT_FMT; + pkg.tx_oob.l_oob.inject_vlan_pri_tag = 1; + pkg.tx_oob.l_oob.pcp = skb_vlan_tag_get_prio(skb); + pkg.tx_oob.l_oob.dei = skb_vlan_tag_get_cfi(skb); + pkg.tx_oob.l_oob.vlan_id = skb_vlan_tag_get_id(skb); + } + pkg.tx_oob.s_oob.pkt_fmt = pkt_fmt; if (pkt_fmt == MANA_SHORT_PKT_FMT) { @@ -1457,6 +1482,12 @@ static void mana_rx_skb(void *buf_va, struct mana_rxcomp_oob *cqe, skb_set_hash(skb, hash_value, PKT_HASH_TYPE_L3); } + if (cqe->rx_vlantag_present) { + u16 vlan_tci = cqe->rx_vlan_id; + + __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), vlan_tci); + } + u64_stats_update_begin(&rx_stats->syncp); rx_stats->packets++; rx_stats->bytes += pkt_len; @@ -2451,8 +2482,9 @@ static int mana_probe_port(struct mana_context *ac, int port_idx, ndev->hw_features |= NETIF_F_RXCSUM; ndev->hw_features |= NETIF_F_TSO | NETIF_F_TSO6; ndev->hw_features |= NETIF_F_RXHASH; - ndev->features = ndev->hw_features; - ndev->vlan_features = 0; + ndev->features = ndev->hw_features | NETIF_F_HW_VLAN_CTAG_TX | + NETIF_F_HW_VLAN_CTAG_RX; + ndev->vlan_features = ndev->features; ndev->xdp_features = NETDEV_XDP_ACT_BASIC | NETDEV_XDP_ACT_REDIRECT | NETDEV_XDP_ACT_NDO_XMIT;
To support vlan, use MANA_LONG_PKT_FMT if vlan tag is present in TX skb. Then extract the vlan tag from the skb struct or the frame, and save it to tx_oob for the NIC to transmit. For RX, extract the vlan tag from CQE and put it into skb. Signed-off-by: Haiyang Zhang <haiyangz@microsoft.com> --- drivers/net/ethernet/microsoft/mana/mana_en.c | 36 +++++++++++++++++-- 1 file changed, 34 insertions(+), 2 deletions(-)