From patchwork Fri Nov 4 03:25:30 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Stanislav Fomichev X-Patchwork-Id: 13031284 X-Patchwork-Delegate: bpf@iogearbox.net Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id BDF88C4332F for ; Fri, 4 Nov 2022 03:27:48 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231288AbiKDD1q (ORCPT ); Thu, 3 Nov 2022 23:27:46 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:59236 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231440AbiKDD0S (ORCPT ); Thu, 3 Nov 2022 23:26:18 -0400 Received: from mail-pf1-x449.google.com (mail-pf1-x449.google.com [IPv6:2607:f8b0:4864:20::449]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 0652CBA6 for ; Thu, 3 Nov 2022 20:25:56 -0700 (PDT) Received: by mail-pf1-x449.google.com with SMTP id u18-20020a627912000000b0056d93d8b8bdso1687362pfc.16 for ; Thu, 03 Nov 2022 20:25:56 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20210112; h=cc:to:from:subject:message-id:references:mime-version:in-reply-to :date:from:to:cc:subject:date:message-id:reply-to; bh=pr1ZhtWkdqKAJX2dVOWrymiTIfYnYJdAHUmQmBo7KU0=; b=pUb47nZCqHPch0ZbXm3RBYrl/S5kuOFKP6kAItBRXBXSGcxoSXXOLo6T+Paf/mFNZE zNxClCq49l4SloyIRcf/Fb/yMN6iyrMTVuFG8YWVj8Dk9QUdNZtl8e9nbk588mGXnm9X 4B/wVVv3M45ezuqTVvsO40v4/mstlF8rATeitA7hmhEoV3ymn2H/qgBy2hWj4Se76OML 4HgIvT544624ULyK9J/mgwuVfLeo9T6S1+m7ifgBND6YbcbTBpliimjv2QJnEDVUflCr mjq4T7yF0H4eHxC/xp5T1H00y+hJFw5NKKxfxGmfyLGe5cdD1e+yHoQyaIoTFCDgr7Kr j5Kg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=cc:to:from:subject:message-id:references:mime-version:in-reply-to :date:x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=pr1ZhtWkdqKAJX2dVOWrymiTIfYnYJdAHUmQmBo7KU0=; b=sqh3zFmnJW8rzjteEDo/tu2SnjMY7xbkyW8413Nke83AmG/4eAY/sEBZf8O8RAtnvo 2uyXKtMnf1AS76OfWZfvP2i9kgiOFzGn72n5Mh6bsHIvwc8jANUHGZjdNeivN4/nyQpx BmR/TjIZfIHZqftd03OV2F4erOBrW04hjUodYb2tBzNjr5wKmUEbXrbNZvsLEejAL4VF OdJNGzT12lb8xPjLylWy+LEpYF0LhaHNjFD5/DeterIowwm6xRp9dSz0b9DNU9Z5dvTZ HwRM4CNk8dZTf3qcWtrlkxRbG/PKAOp6Vt+EXtUbVFlhi6Es7pOxf5SBvD4+NyQegnJN coZw== X-Gm-Message-State: ACrzQf2dtGvdn+suUptqGgCbTqYE+wzcj1pmGKSDT5ohpHnDSXFsFgn7 y6Qn504+CHPTvyV287yNDu6quTY= X-Google-Smtp-Source: AMsMyM7KE3YzYg5J2ApCRH6vpkXFRIqTcblZWRYi2ncYtzIkrTYu4YQIPzmytaJD6ieO+JZ8yMA+1d8= X-Received: from sdf.c.googlers.com ([fda3:e722:ac3:cc00:7f:e700:c0a8:5935]) (user=sdf job=sendgmr) by 2002:a05:6a00:24d0:b0:56c:fa97:a91c with SMTP id d16-20020a056a0024d000b0056cfa97a91cmr33601318pfv.23.1667532355739; Thu, 03 Nov 2022 20:25:55 -0700 (PDT) Date: Thu, 3 Nov 2022 20:25:30 -0700 In-Reply-To: <20221104032532.1615099-1-sdf@google.com> Mime-Version: 1.0 References: <20221104032532.1615099-1-sdf@google.com> X-Mailer: git-send-email 2.38.1.431.g37b22c650d-goog Message-ID: <20221104032532.1615099-13-sdf@google.com> Subject: [RFC bpf-next v2 12/14] mxl4: Support rx timestamp metadata for xdp From: Stanislav Fomichev To: bpf@vger.kernel.org Cc: ast@kernel.org, daniel@iogearbox.net, andrii@kernel.org, martin.lau@linux.dev, song@kernel.org, yhs@fb.com, john.fastabend@gmail.com, kpsingh@kernel.org, sdf@google.com, haoluo@google.com, jolsa@kernel.org, David Ahern , Jakub Kicinski , Willem de Bruijn , Jesper Dangaard Brouer , Anatoly Burakov , Alexander Lobakin , Magnus Karlsson , Maryam Tahhan , xdp-hints@xdp-project.net, netdev@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org X-Patchwork-Delegate: bpf@iogearbox.net X-Patchwork-State: RFC COMPILE-TESTED ONLY! Cc: John Fastabend Cc: David Ahern Cc: Martin KaFai Lau Cc: Jakub Kicinski Cc: Willem de Bruijn Cc: Jesper Dangaard Brouer Cc: Anatoly Burakov Cc: Alexander Lobakin Cc: Magnus Karlsson Cc: Maryam Tahhan Cc: xdp-hints@xdp-project.net Cc: netdev@vger.kernel.org Signed-off-by: Stanislav Fomichev --- .../net/ethernet/mellanox/mlx4/en_netdev.c | 1 + drivers/net/ethernet/mellanox/mlx4/en_rx.c | 40 +++++++++++++++++++ include/linux/mlx4/device.h | 7 ++++ 3 files changed, 48 insertions(+) diff --git a/drivers/net/ethernet/mellanox/mlx4/en_netdev.c b/drivers/net/ethernet/mellanox/mlx4/en_netdev.c index ca4b93a01034..3ef7995950dc 100644 --- a/drivers/net/ethernet/mellanox/mlx4/en_netdev.c +++ b/drivers/net/ethernet/mellanox/mlx4/en_netdev.c @@ -2890,6 +2890,7 @@ static const struct net_device_ops mlx4_netdev_ops_master = { .ndo_features_check = mlx4_en_features_check, .ndo_set_tx_maxrate = mlx4_en_set_tx_maxrate, .ndo_bpf = mlx4_xdp, + .ndo_unroll_kfunc = mlx4_unroll_kfunc, }; struct mlx4_en_bond { diff --git a/drivers/net/ethernet/mellanox/mlx4/en_rx.c b/drivers/net/ethernet/mellanox/mlx4/en_rx.c index 467356633172..83c89a1db3b8 100644 --- a/drivers/net/ethernet/mellanox/mlx4/en_rx.c +++ b/drivers/net/ethernet/mellanox/mlx4/en_rx.c @@ -33,6 +33,7 @@ #include #include +#include #include #include #include @@ -663,8 +664,43 @@ static int check_csum(struct mlx4_cqe *cqe, struct sk_buff *skb, void *va, struct mlx4_xdp_buff { struct xdp_buff xdp; + struct mlx4_cqe *cqe; + struct mlx4_en_dev *mdev; + u64 r0; }; +struct mlx4_xdp_buff *mxl4_xdp_rx_timestamp(struct mlx4_xdp_buff *ctx) +{ + unsigned int seq; + u64 timestamp; + u64 nsec; + + timestamp = mlx4_en_get_cqe_ts(ctx->cqe); + + do { + seq = read_seqbegin(&ctx->mdev->clock_lock); + nsec = timecounter_cyc2time(&ctx->mdev->clock, timestamp); + } while (read_seqretry(&ctx->mdev->clock_lock, seq)); + + ctx->r0 = (u64)ns_to_ktime(nsec); + return ctx; +} + +void mlx4_unroll_kfunc(const struct bpf_prog *prog, u32 func_id, + struct bpf_patch *patch) +{ + if (func_id == xdp_metadata_kfunc_id(XDP_METADATA_KFUNC_EXPORT_TO_SKB)) { + return xdp_metadata_export_to_skb(prog, patch); + } else if (func_id == xdp_metadata_kfunc_id(XDP_METADATA_KFUNC_RX_TIMESTAMP_SUPPORTED)) { + /* return true; */ + bpf_patch_append(patch, BPF_MOV64_IMM(BPF_REG_0, 1)); + } else if (func_id == xdp_metadata_kfunc_id(XDP_METADATA_KFUNC_RX_TIMESTAMP)) { + xdp_kfunc_call_preserving_r1(patch, + offsetof(struct mlx4_xdp_buff, r0), + mxl4_xdp_rx_timestamp); + } +} + int mlx4_en_process_rx_cq(struct net_device *dev, struct mlx4_en_cq *cq, int budget) { struct mlx4_en_priv *priv = netdev_priv(dev); @@ -783,6 +819,10 @@ int mlx4_en_process_rx_cq(struct net_device *dev, struct mlx4_en_cq *cq, int bud xdp_prepare_buff(&mxbuf.xdp, va - frags[0].page_offset, frags[0].page_offset, length, false); orig_data = mxbuf.xdp.data; + if (unlikely(ring->hwtstamp_rx_filter == HWTSTAMP_FILTER_ALL)) { + mxbuf.cqe = cqe; + mxbuf.mdev = priv->mdev; + } act = bpf_prog_run_xdp(xdp_prog, &mxbuf.xdp); diff --git a/include/linux/mlx4/device.h b/include/linux/mlx4/device.h index 6646634a0b9d..a0e4d490b2fb 100644 --- a/include/linux/mlx4/device.h +++ b/include/linux/mlx4/device.h @@ -1585,4 +1585,11 @@ static inline int mlx4_get_num_reserved_uar(struct mlx4_dev *dev) /* The first 128 UARs are used for EQ doorbells */ return (128 >> (PAGE_SHIFT - dev->uar_page_shift)); } + +struct bpf_prog; +struct bpf_insn; +struct bpf_patch; + +void mlx4_unroll_kfunc(const struct bpf_prog *prog, u32 func_id, + struct bpf_patch *patch); #endif /* MLX4_DEVICE_H */