diff options
| author | Taehee Yoo <ap420073@gmail.com> | 2025-01-14 14:28:51 +0000 |
|---|---|---|
| committer | Jakub Kicinski <kuba@kernel.org> | 2025-01-15 14:42:12 -0800 |
| commit | f394d07b192b67a895dbed76253ce95dcbb5d17c (patch) | |
| tree | a5b640ca3f193b418f4bd520489cddc086b59854 /drivers/net/netdevsim/netdev.c | |
| parent | 6b43673a25c3666d42f5524e59aed8a3914924cc (diff) | |
netdevsim: add HDS feature
HDS options(tcp-data-split, hds-thresh) have dependencies between other
features like XDP. Basic dependencies are checked in the core API.
netdevsim is very useful to check basic dependencies.
The default tcp-data-split mode is UNKNOWN but netdevsim driver
returns ENABLED when ethtool dumps tcp-data-split mode.
The default value of HDS threshold is 0 and the maximum value is 1024.
ethtool shows like this.
ethtool -g eni1np1
Ring parameters for eni1np1:
Pre-set maximums:
...
HDS thresh: 1024
Current hardware settings:
...
TCP data split: on
HDS thresh: 0
ethtool -G eni1np1 tcp-data-split on hds-thresh 1024
ethtool -g eni1np1
Ring parameters for eni1np1:
Pre-set maximums:
...
HDS thresh: 1024
Current hardware settings:
...
TCP data split: on
HDS thresh: 1024
Signed-off-by: Taehee Yoo <ap420073@gmail.com>
Link: https://patch.msgid.link/20250114142852.3364986-10-ap420073@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Diffstat (limited to 'drivers/net/netdevsim/netdev.c')
| -rw-r--r-- | drivers/net/netdevsim/netdev.c | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/drivers/net/netdevsim/netdev.c b/drivers/net/netdevsim/netdev.c index d013b6498539..f92b05ccdca9 100644 --- a/drivers/net/netdevsim/netdev.c +++ b/drivers/net/netdevsim/netdev.c @@ -15,6 +15,7 @@ #include <linux/debugfs.h> #include <linux/etherdevice.h> +#include <linux/ethtool_netlink.h> #include <linux/kernel.h> #include <linux/module.h> #include <linux/netdevice.h> @@ -54,6 +55,7 @@ static int nsim_forward_skb(struct net_device *dev, struct sk_buff *skb, static netdev_tx_t nsim_start_xmit(struct sk_buff *skb, struct net_device *dev) { struct netdevsim *ns = netdev_priv(dev); + struct ethtool_netdev_state *ethtool; struct net_device *peer_dev; unsigned int len = skb->len; struct netdevsim *peer_ns; @@ -74,6 +76,13 @@ static netdev_tx_t nsim_start_xmit(struct sk_buff *skb, struct net_device *dev) rxq = rxq % peer_dev->num_rx_queues; rq = peer_ns->rq[rxq]; + ethtool = peer_dev->ethtool; + if (skb_is_nonlinear(skb) && + (ethtool->hds_config != ETHTOOL_TCP_DATA_SPLIT_ENABLED || + (ethtool->hds_config == ETHTOOL_TCP_DATA_SPLIT_ENABLED && + ethtool->hds_thresh > len))) + skb_linearize(skb); + skb_tx_timestamp(skb); if (unlikely(nsim_forward_skb(peer_dev, skb, rq) == NET_RX_DROP)) goto out_drop_cnt; |