[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Message-ID: <ZmrN2W8Fye450TKs@shell.armlinux.org.uk>
Date: Thu, 13 Jun 2024 11:45:45 +0100
From: "Russell King (Oracle)" <linux@...linux.org.uk>
To: Furong Xu <0x1207@...il.com>
Cc: "David S. Miller" <davem@...emloft.net>,
Alexandre Torgue <alexandre.torgue@...s.st.com>,
Jose Abreu <joabreu@...opsys.com>,
Eric Dumazet <edumazet@...gle.com>,
Jakub Kicinski <kuba@...nel.org>, Paolo Abeni <pabeni@...hat.com>,
Maxime Coquelin <mcoquelin.stm32@...il.com>,
Joao Pinto <jpinto@...opsys.com>,
Corinna Vinschen <vinschen@...hat.com>, netdev@...r.kernel.org,
linux-stm32@...md-mailman.stormreply.com,
linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
xfr@...look.com, rock.xu@....com
Subject: Re: [PATCH net-next v1] net: stmmac: Enable TSO on VLANs
On Thu, Jun 13, 2024 at 10:38:08AM +0800, Furong Xu wrote:
> @@ -4239,16 +4239,32 @@ static netdev_tx_t stmmac_tso_xmit(struct sk_buff *skb, struct net_device *dev)
> struct stmmac_txq_stats *txq_stats;
> int tmp_pay_len = 0, first_tx;
> struct stmmac_tx_queue *tx_q;
> - bool has_vlan, set_ic;
> + bool set_ic;
> u8 proto_hdr_len, hdr;
> u32 pay_len, mss;
> dma_addr_t des;
> int i;
> + struct vlan_ethhdr *veth;
>
> tx_q = &priv->dma_conf.tx_queue[queue];
> txq_stats = &priv->xstats.txq_stats[queue];
> first_tx = tx_q->cur_tx;
>
> + if (skb_vlan_tag_present(skb)) {
> + /* Always insert VLAN tag to SKB payload for TSO frames.
> + *
> + * Never insert VLAN tag by HW, since segments splited by
> + * TSO engine will be un-tagged by mistake.
> + */
> + skb_push(skb, VLAN_HLEN);
> + memmove(skb->data, skb->data + VLAN_HLEN, ETH_ALEN * 2);
> +
> + veth = skb_vlan_eth_hdr(skb);
> + veth->h_vlan_proto = skb->vlan_proto;
> + veth->h_vlan_TCI = htons(skb_vlan_tag_get(skb));
> + __vlan_hwaccel_clear_tag(skb);
> + }
I think drivers/net/ethernet/marvell/octeontx2/nic/otx2_txrx.c::
otx2_sq_append_skb() does something similar, but uses a helper
instead:
if (skb_shinfo(skb)->gso_size && !is_hw_tso_supported(pfvf, skb)) {
/* Insert vlan tag before giving pkt to tso */
if (skb_vlan_tag_present(skb))
skb = __vlan_hwaccel_push_inside(skb);
otx2_sq_append_tso(pfvf, sq, skb, qidx);
return true;
}
Maybe __vlan_hwaccel_push_inside() should be used here?
--
RMK's Patch system: https://www.armlinux.org.uk/developer/patches/
FTTP is here! 80Mbps down 10Mbps up. Decent connectivity at last!
Powered by blists - more mailing lists