From: Jakub Kicinski Date: Thu, 8 Feb 2018 04:55:25 +0000 (-0800) Subject: nfp: limit the number of TSO segments X-Git-Url: http://git.cdn.openwrt.org/?a=commitdiff_plain;h=0d592e52fbbda26155b686dd93878cf774a3ab0e;p=openwrt%2Fstaging%2Fblogic.git nfp: limit the number of TSO segments Most FWs limit the number of TSO segments a frame can produce to 64. This is for fairness and efficiency (of FW datapath) reasons. If a frame with larger number of segments is submitted the FW will drop it. Signed-off-by: Jakub Kicinski Reviewed-by: Simon Horman Signed-off-by: David S. Miller --- diff --git a/drivers/net/ethernet/netronome/nfp/nfp_net_common.c b/drivers/net/ethernet/netronome/nfp/nfp_net_common.c index 19e989239af7..a05be0ab2713 100644 --- a/drivers/net/ethernet/netronome/nfp/nfp_net_common.c +++ b/drivers/net/ethernet/netronome/nfp/nfp_net_common.c @@ -3750,6 +3750,8 @@ static void nfp_net_netdev_init(struct nfp_net *nn) netdev->min_mtu = ETH_MIN_MTU; netdev->max_mtu = nn->max_mtu; + netdev->gso_max_segs = NFP_NET_LSO_MAX_SEGS; + netif_carrier_off(netdev); nfp_net_set_ethtool_ops(netdev); diff --git a/drivers/net/ethernet/netronome/nfp/nfp_net_ctrl.h b/drivers/net/ethernet/netronome/nfp/nfp_net_ctrl.h index eeecef2caac6..4499a7333078 100644 --- a/drivers/net/ethernet/netronome/nfp/nfp_net_ctrl.h +++ b/drivers/net/ethernet/netronome/nfp/nfp_net_ctrl.h @@ -59,9 +59,12 @@ #define NFP_NET_RX_OFFSET 32 /** - * Maximum header size supported for LSO frames + * LSO parameters + * %NFP_NET_LSO_MAX_HDR_SZ: Maximum header size supported for LSO frames + * %NFP_NET_LSO_MAX_SEGS: Maximum number of segments LSO frame can produce */ #define NFP_NET_LSO_MAX_HDR_SZ 255 +#define NFP_NET_LSO_MAX_SEGS 64 /** * Prepend field types