From owner-svn-src-stable@freebsd.org Mon Apr 13 08:33:50 2020 Return-Path: Delivered-To: svn-src-stable@mailman.nyi.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mailman.nyi.freebsd.org (Postfix) with ESMTP id 27D0A2B7006; Mon, 13 Apr 2020 08:33:50 +0000 (UTC) (envelope-from hselasky@FreeBSD.org) Received: from mxrelay.nyi.freebsd.org (mxrelay.nyi.freebsd.org [IPv6:2610:1c1:1:606c::19:3]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) server-signature RSA-PSS (4096 bits) client-signature RSA-PSS (4096 bits) client-digest SHA256) (Client CN "mxrelay.nyi.freebsd.org", Issuer "Let's Encrypt Authority X3" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 49122k02r0z4GyN; Mon, 13 Apr 2020 08:33:50 +0000 (UTC) (envelope-from hselasky@FreeBSD.org) Received: from repo.freebsd.org (repo.freebsd.org [IPv6:2610:1c1:1:6068::e6a:0]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client did not present a certificate) by mxrelay.nyi.freebsd.org (Postfix) with ESMTPS id F0CF1186FB; Mon, 13 Apr 2020 08:33:49 +0000 (UTC) (envelope-from hselasky@FreeBSD.org) Received: from repo.freebsd.org ([127.0.1.37]) by repo.freebsd.org (8.15.2/8.15.2) with ESMTP id 03D8XntG083376; Mon, 13 Apr 2020 08:33:49 GMT (envelope-from hselasky@FreeBSD.org) Received: (from hselasky@localhost) by repo.freebsd.org (8.15.2/8.15.2/Submit) id 03D8XnLU083375; Mon, 13 Apr 2020 08:33:49 GMT (envelope-from hselasky@FreeBSD.org) Message-Id: <202004130833.03D8XnLU083375@repo.freebsd.org> X-Authentication-Warning: repo.freebsd.org: hselasky set sender to hselasky@FreeBSD.org using -f From: Hans Petter Selasky Date: Mon, 13 Apr 2020 08:33:49 +0000 (UTC) To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-stable@freebsd.org, svn-src-stable-10@freebsd.org Subject: svn commit: r359847 - stable/10/sys/dev/mlx5/mlx5_en X-SVN-Group: stable-10 X-SVN-Commit-Author: hselasky X-SVN-Commit-Paths: stable/10/sys/dev/mlx5/mlx5_en X-SVN-Commit-Revision: 359847 X-SVN-Commit-Repository: base MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-BeenThere: svn-src-stable@freebsd.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: SVN commit messages for all the -stable branches of the src tree List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 13 Apr 2020 08:33:50 -0000 Author: hselasky Date: Mon Apr 13 08:33:49 2020 New Revision: 359847 URL: https://svnweb.freebsd.org/changeset/base/359847 Log: MFC r359654: Ensure a minimum inline size of 16 bytes in mlx5en(4). This includes 14 bytes of ethernet header and 2 bytes of VLAN header. This allows for making assumptions about the inline size limit in the fast transmit path later on. Use a signed integer variable to catch underflow. Sponsored by: Mellanox Technologies Modified: stable/10/sys/dev/mlx5/mlx5_en/mlx5_en_main.c Directory Properties: stable/10/ (props changed) Modified: stable/10/sys/dev/mlx5/mlx5_en/mlx5_en_main.c ============================================================================== --- stable/10/sys/dev/mlx5/mlx5_en/mlx5_en_main.c Mon Apr 13 08:28:02 2020 (r359846) +++ stable/10/sys/dev/mlx5/mlx5_en/mlx5_en_main.c Mon Apr 13 08:33:49 2020 (r359847) @@ -2880,11 +2880,19 @@ mlx5e_check_required_hca_cap(struct mlx5_core_dev *mde static u16 mlx5e_get_max_inline_cap(struct mlx5_core_dev *mdev) { - int bf_buf_size = (1 << MLX5_CAP_GEN(mdev, log_bf_reg_size)) / 2; + const int min_size = ETHER_VLAN_ENCAP_LEN + ETHER_HDR_LEN; + const int max_size = MLX5E_MAX_TX_INLINE; + const int bf_buf_size = + ((1U << MLX5_CAP_GEN(mdev, log_bf_reg_size)) / 2U) - + (sizeof(struct mlx5e_tx_wqe) - 2); - return bf_buf_size - - sizeof(struct mlx5e_tx_wqe) + - 2 /*sizeof(mlx5e_tx_wqe.inline_hdr_start)*/; + /* verify against driver limits */ + if (bf_buf_size > max_size) + return (max_size); + else if (bf_buf_size < min_size) + return (min_size); + else + return (bf_buf_size); } static void