Date: Mon, 26 Mar 2018 21:02:20 +0000 (UTC) From: Hans Petter Selasky <hselasky@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-stable@freebsd.org, svn-src-stable-11@freebsd.org Subject: svn commit: r331588 - stable/11/sys/dev/mlx5/mlx5_en Message-ID: <201803262102.w2QL2KPm036915@repo.freebsd.org>
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Author: hselasky Date: Mon Mar 26 21:02:20 2018 New Revision: 331588 URL: https://svnweb.freebsd.org/changeset/base/331588 Log: MFC r330657: Use vport rather than physical-port MTU in mlx5en(4). Set and report vport MTU rather than physical MTU, The driver will set both vport and physical port mtu and will rely on the query of vport mtu. SRIOV VFs have to report their MTU to their vport manager (PF), and this will allow them to work with any MTU they need without failing the request. Also for some cases where the PF is not a port owner, PF can work with MTU less than the physical port mtu if set physical port mtu didn't take effect. Based on Linux upstream commit: cd255efff9baadd654d6160e52d17ae7c568c9d3 Submitted by: Meny Yossefi <menyy@mellanox.com> Sponsored by: Mellanox Technologies Modified: stable/11/sys/dev/mlx5/mlx5_en/mlx5_en_main.c Directory Properties: stable/11/ (props changed) Modified: stable/11/sys/dev/mlx5/mlx5_en/mlx5_en_main.c ============================================================================== --- stable/11/sys/dev/mlx5/mlx5_en/mlx5_en_main.c Mon Mar 26 21:00:57 2018 (r331587) +++ stable/11/sys/dev/mlx5/mlx5_en/mlx5_en_main.c Mon Mar 26 21:02:20 2018 (r331588) @@ -2341,15 +2341,29 @@ mlx5e_set_dev_port_mtu(struct ifnet *ifp, int sw_mtu) int hw_mtu; int err; - err = mlx5_set_port_mtu(mdev, MLX5E_SW2HW_MTU(sw_mtu)); + hw_mtu = MLX5E_SW2HW_MTU(sw_mtu); + + err = mlx5_set_port_mtu(mdev, hw_mtu); if (err) { if_printf(ifp, "%s: mlx5_set_port_mtu failed setting %d, err=%d\n", __func__, sw_mtu, err); return (err); } + /* Update vport context MTU */ + err = mlx5_set_vport_mtu(mdev, hw_mtu); + if (err) { + if_printf(ifp, "%s: Failed updating vport context with MTU size, err=%d\n", + __func__, err); + } + ifp->if_mtu = sw_mtu; - err = mlx5_query_port_oper_mtu(mdev, &hw_mtu); + + err = mlx5_query_vport_mtu(mdev, &hw_mtu); + if (err || !hw_mtu) { + /* fallback to port oper mtu */ + err = mlx5_query_port_oper_mtu(mdev, &hw_mtu); + } if (err) { if_printf(ifp, "Query port MTU, after setting new " "MTU value, failed\n");
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