From nobody Thu Apr 9 06:46:29 2026 Received: from mail-pl1-f173.google.com (mail-pl1-f173.google.com [209.85.214.173]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 2612E38551B for ; Wed, 8 Apr 2026 23:06:24 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.214.173 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1775689590; cv=none; b=j/NZmH4lelSOS6dkxldVJ3lUbE7SXaTvcjzAGr/EwSw4/6k5Mi589vsseSc/+qMoMGZA8A0rV0cRuGkV0zISGgYZEWbjksFnTzBqrStFj1yrbthgmZ8T9ZzKqRrKRYirYzQCjEne8I4FaxQbqoxGDFgioJB5pU/VvooGKirs6zg= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1775689590; c=relaxed/simple; bh=imhnP3c90RnqduwmC0Bs7sD+WwiHek5Y56xEli2D4zw=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=cGxp6aTXNR8vTJ4Qv0c+7RRx/l0jJwenWuX8UptfrVSSbjRHt62g8oivIPpy6kSLPxZgTPGVAyPOqtEC9fYoHMPXV/ArCU5SoH+khH0tlyY7wJVRgja0zX6/8dQ28112Y6MPXmUaMK509mdHCbNXa1ZUnE7oMUGF/pwMOZ3ofAs= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=dama.to; spf=none smtp.mailfrom=dama.to; dkim=pass (2048-bit key) header.d=dama-to.20251104.gappssmtp.com header.i=@dama-to.20251104.gappssmtp.com header.b=PCd+W6uJ; arc=none smtp.client-ip=209.85.214.173 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=dama.to Authentication-Results: smtp.subspace.kernel.org; spf=none smtp.mailfrom=dama.to Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=dama-to.20251104.gappssmtp.com header.i=@dama-to.20251104.gappssmtp.com header.b="PCd+W6uJ" Received: by mail-pl1-f173.google.com with SMTP id d9443c01a7336-2aae146b604so2431135ad.3 for ; Wed, 08 Apr 2026 16:06:24 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=dama-to.20251104.gappssmtp.com; s=20251104; t=1775689584; x=1776294384; darn=vger.kernel.org; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=gILlFOgGbo5p4rommdyZj12/KVIzsVhqUzxLDwWsXoM=; b=PCd+W6uJyv2pSwLleizYtKZImlVCVQPf/pogGHl2I7eZ2DxxDTOxNVSvGxCY9SS6ZQ r+8YaKQF1EPKNkgasH/o2IWcrNPOt71q8hGdUZg2h7/3waFbPEkVcUNFDuVrzLLo0aaA waQDL+GhBEIcc1BK8xDqW1vEKviepj2fL0N0xkDCHsGcy00suldpTPr3BVDU5RwIzkhU O7adZvmjYZrSu2IdW2ZyMaKGcQGVia2VK68WlnCHGIKv9PNd4gH7NcuzNTxVCDf5425X Jelil90Arem91upK4tJBr3TVJWfd5LcyffdDsssWJoLVw52WdH02quewebC58FhLgk6k Ddbw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1775689584; x=1776294384; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-gg:x-gm-message-state:from :to:cc:subject:date:message-id:reply-to; bh=gILlFOgGbo5p4rommdyZj12/KVIzsVhqUzxLDwWsXoM=; b=TpZvpi0QWQ5Ht2wR8kxSEuzn8KJDibMDTE0YtOw0PY0X378k9kOcPepcgpSlSkyZJ4 sxqoHnbg3F0XNpXn8cu8y4t72BfddLa5TGCW8RvtRO0Mr3outnfuKrY3H2LPtyHnefqN xTlndeiBemkIkOVMwESjrF+JDt0H1AvzkMjZR2z71qwR+0eahIG5iQVdFtffn4gxK7s4 HrrYDLOXZ0jxAPAiBdWepGphy4UaOwph5V6MfB6edId2wgxpL+o7ZsLkkCSnzY2PWQ+s tZ+2Ol9Tmo2wv6xky+cLwtb4UxPWa+CHa858ohM0ULZnSGfofO5A71AvQFV11m/E0wBN S5OA== X-Forwarded-Encrypted: i=1; AJvYcCU2TXyUDllc4KwIQyTYf4yI87Ynm723i52fn28PX03v584ML2vYeV4DJZRj6Pe3UQ17Bn2mgiTLLAgkAr0=@vger.kernel.org X-Gm-Message-State: AOJu0YzdebHwd6PDcnKFTq3rhVInN6pigZHJQ9OialJzPAU7362cE+iN hma6zxFmsy/tmo7hnTmFMJeKsMJf1Rr51BJfjLfH5WCLgiaaUkXsCjoM9gU4ppUyjfQ= X-Gm-Gg: AeBDietZKoMrRVXcrLXxmS0oRFFdtpTsr69dwqylQOKOaNdP5OQzAwL+dazCUAhb/5y bZ0MVhP8vwJS6MfZds0OrjzhvpMl1two4o4UghGdct+AynlZrgmzi4hmyZtaNXxvod6DOXTMhdI 7xX1Jxuj1t2mz5P95WjYKvFDsKz0LFCVjWE+riBqewABgAoPZMHQ7++RDxXvOiyjm4F8oOXwdsa lPUQrUS182DsMsC7Vgs3kAOHFdp9urShi8lfga9nCnBzamaRXOooQJ4UZNoC2I3CRH2Gm+JAJ/N jM/02l612Uw0xq5ia5uwK4dVjbiPpCmKBIFuSdv5xgnL+dS0QW+1smLXZ0P/FEs7d2WLl5/DJKq NDVop8F4nVRnT0vYl6pEL5qLq2Kmfy8Dl6dTsdDV7FvwjwDavZhszSIlBZGNB8FRsZqOD+qKSOY pFlvhz X-Received: by 2002:a17:903:287:b0:2b0:c2d9:270a with SMTP id d9443c01a7336-2b28198d6e9mr235351495ad.42.1775689584518; Wed, 08 Apr 2026 16:06:24 -0700 (PDT) Received: from localhost ([2a03:2880:2ff:5e::]) by smtp.gmail.com with ESMTPSA id d9443c01a7336-2b27475ff56sm213190295ad.22.2026.04.08.16.06.23 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 08 Apr 2026 16:06:24 -0700 (PDT) From: Joe Damato To: netdev@vger.kernel.org, Michael Chan , Pavan Chebbi , Andrew Lunn , "David S. Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , Richard Cochran , Alexei Starovoitov , Daniel Borkmann , Jesper Dangaard Brouer , John Fastabend , Stanislav Fomichev Cc: horms@kernel.org, linux-kernel@vger.kernel.org, leon@kernel.org, Joe Damato , bpf@vger.kernel.org Subject: [net-next v10 06/10] net: bnxt: Add boilerplate GSO code Date: Wed, 8 Apr 2026 16:05:55 -0700 Message-ID: <20260408230607.2019402-7-joe@dama.to> X-Mailer: git-send-email 2.52.0 In-Reply-To: <20260408230607.2019402-1-joe@dama.to> References: <20260408230607.2019402-1-joe@dama.to> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" Add bnxt_gso.c and bnxt_gso.h with a stub bnxt_sw_udp_gso_xmit() function, SW USO constants (BNXT_SW_USO_MAX_SEGS, BNXT_SW_USO_MAX_DESCS), and the is_sw_gso field in bnxt_sw_tx_bd with BNXT_SW_GSO_MID/LAST markers. The full SW USO implementation will be added in a future commit. Suggested-by: Jakub Kicinski Reviewed-by: Pavan Chebbi Signed-off-by: Joe Damato --- v7: - Changed the placement of is_sw_gso in struct bnxt_sw_tx_bd to be near other is_* fields. - No functional changes. v5: - Added Pavan's Reviewed-by. No functional changes. drivers/net/ethernet/broadcom/bnxt/Makefile | 2 +- drivers/net/ethernet/broadcom/bnxt/bnxt.h | 4 +++ drivers/net/ethernet/broadcom/bnxt/bnxt_gso.c | 30 ++++++++++++++++++ drivers/net/ethernet/broadcom/bnxt/bnxt_gso.h | 31 +++++++++++++++++++ 4 files changed, 66 insertions(+), 1 deletion(-) create mode 100644 drivers/net/ethernet/broadcom/bnxt/bnxt_gso.c create mode 100644 drivers/net/ethernet/broadcom/bnxt/bnxt_gso.h diff --git a/drivers/net/ethernet/broadcom/bnxt/Makefile b/drivers/net/ethe= rnet/broadcom/bnxt/Makefile index ba6c239d52fa..debef78c8b6d 100644 --- a/drivers/net/ethernet/broadcom/bnxt/Makefile +++ b/drivers/net/ethernet/broadcom/bnxt/Makefile @@ -1,7 +1,7 @@ # SPDX-License-Identifier: GPL-2.0-only obj-$(CONFIG_BNXT) +=3D bnxt_en.o =20 -bnxt_en-y :=3D bnxt.o bnxt_hwrm.o bnxt_sriov.o bnxt_ethtool.o bnxt_dcb.o b= nxt_ulp.o bnxt_xdp.o bnxt_ptp.o bnxt_vfr.o bnxt_devlink.o bnxt_dim.o bnxt_c= oredump.o +bnxt_en-y :=3D bnxt.o bnxt_hwrm.o bnxt_sriov.o bnxt_ethtool.o bnxt_dcb.o b= nxt_ulp.o bnxt_xdp.o bnxt_ptp.o bnxt_vfr.o bnxt_devlink.o bnxt_dim.o bnxt_c= oredump.o bnxt_gso.o bnxt_en-$(CONFIG_BNXT_FLOWER_OFFLOAD) +=3D bnxt_tc.o bnxt_en-$(CONFIG_DEBUG_FS) +=3D bnxt_debugfs.o bnxt_en-$(CONFIG_BNXT_HWMON) +=3D bnxt_hwmon.o diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt.h b/drivers/net/ethern= et/broadcom/bnxt/bnxt.h index d98a58aa30f6..6b38b84924e0 100644 --- a/drivers/net/ethernet/broadcom/bnxt/bnxt.h +++ b/drivers/net/ethernet/broadcom/bnxt/bnxt.h @@ -892,6 +892,7 @@ struct bnxt_sw_tx_bd { struct page *page; u8 is_ts_pkt; u8 is_push; + u8 is_sw_gso; u8 action; unsigned short nr_frags; union { @@ -900,6 +901,9 @@ struct bnxt_sw_tx_bd { }; }; =20 +#define BNXT_SW_GSO_MID 1 +#define BNXT_SW_GSO_LAST 2 + struct bnxt_sw_rx_bd { void *data; u8 *data_ptr; diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt_gso.c b/drivers/net/et= hernet/broadcom/bnxt/bnxt_gso.c new file mode 100644 index 000000000000..b296769ee4fe --- /dev/null +++ b/drivers/net/ethernet/broadcom/bnxt/bnxt_gso.c @@ -0,0 +1,30 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* Broadcom NetXtreme-C/E network driver. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation. + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include "bnxt.h" +#include "bnxt_gso.h" + +netdev_tx_t bnxt_sw_udp_gso_xmit(struct bnxt *bp, + struct bnxt_tx_ring_info *txr, + struct netdev_queue *txq, + struct sk_buff *skb) +{ + dev_kfree_skb_any(skb); + dev_core_stats_tx_dropped_inc(bp->dev); + return NETDEV_TX_OK; +} diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt_gso.h b/drivers/net/et= hernet/broadcom/bnxt/bnxt_gso.h new file mode 100644 index 000000000000..f01e8102dcd7 --- /dev/null +++ b/drivers/net/ethernet/broadcom/bnxt/bnxt_gso.h @@ -0,0 +1,31 @@ +/* SPDX-License-Identifier: GPL-2.0-or-later */ +/* + * Broadcom NetXtreme-C/E network driver. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation. + */ + +#ifndef BNXT_GSO_H +#define BNXT_GSO_H + +/* Maximum segments the stack may send in a single SW USO skb. + * This caps gso_max_segs for NICs without HW USO support. + */ +#define BNXT_SW_USO_MAX_SEGS 64 + +/* Worst-case TX descriptors consumed by one SW USO packet: + * Each segment: 1 long BD + 1 ext BD + payload BDs. + * Total payload BDs across all segs <=3D num_segs + nr_frags (each frag + * boundary crossing adds at most 1 extra BD). + * So: 3 * max_segs + MAX_SKB_FRAGS + 1 =3D 3 * 64 + 17 + 1 =3D 210. + */ +#define BNXT_SW_USO_MAX_DESCS (3 * BNXT_SW_USO_MAX_SEGS + MAX_SKB_FRAGS + = 1) + +netdev_tx_t bnxt_sw_udp_gso_xmit(struct bnxt *bp, + struct bnxt_tx_ring_info *txr, + struct netdev_queue *txq, + struct sk_buff *skb); + +#endif --=20 2.52.0