From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 9354540B6E7 for ; Wed, 10 Jun 2026 13:34:13 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1781098458; cv=none; b=p/kFc+7AL+n0zOoYF/q+JsCUIQ1LxSmtoFsBJEy8rid654FtrskHw022bjTiVSoPF/ROIjThMdt7w8KXBoNW1c3znxD3EvO3r/dh3xiExaG9tdudihvdoNfCcMJWi0LJHB5vXT7iWE9sQ3W2YZj1yxsta/2+sosrAIhZ0C/fftM= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1781098458; c=relaxed/simple; bh=qgrA3XioKdkJphht2g8d3A6h701hC/9PRE5eNNfMt8k=; h=From:Subject:Date:Message-Id:MIME-Version:Content-Type:To:Cc; b=Q6IovgHQWzj0JBA5N76WJVo9oSJEF1jlUyImfLRz/QvfZAvQD/Vc8OimjdLjQAaaP8se83MUtpM8vZIsocUJK2YWG7+pn89C0O1pvw1zbQxsRWaiV+r+yUSGyeTAEqb3SsnfqmlAQ6A5DCpff4JDZSHESnBXMYL9qDjjTX94t/Q= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=HkiQtbdI; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="HkiQtbdI" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 5A5001F00893; Wed, 10 Jun 2026 13:34:12 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1781098452; bh=pud1BKNlE340QqB4LGfMxf04oM6t5suYLOhM/DdiAO0=; h=From:Subject:Date:To:Cc; b=HkiQtbdIhjM43fJCPp/ffFJDxFzwsT3cnJXX0EzqTwMusjiO2M4XhYPjBbePdgoNL Z/TfQnTF+PV6dK0VAfJaUYtz+V9dv30cDiVoIw/Hgk9WhlmWZ1wgDrCRE4q2OBAPKM ev9d1Nwq37b6VLf3XrDUoMPod/ndCmujlghN46Cb6d4D5/utQ2ot/xXSbFUwFIdy7l V78+5ibnp4V9QNQdhw/LqLC40kpWEqGtb2WBrYb61LpSLfNaQsBNrrieUbL+vPBrE8 O2w8SapdOfLxd091jSR+CxiTwSHJ79KWQtQaf1yuiWUJHqWKEXYoUEMNg5QfZKk9eg THbhH5McTNGIA== From: Lorenzo Bianconi Subject: [PATCH net-next v4 0/2] airoha: add the capability to configure GDM3/GDM4 as WAN/LAN on demand Date: Wed, 10 Jun 2026 15:33:35 +0200 Message-Id: <20260610-airoha-ethtool-priv_flags-v4-0-60e89cf28fea@kernel.org> Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit X-B4-Tracking: v=1; b=H4sIAAAAAAAC/43NTQqDMBAF4KtI1k3JjzXaVe9RSolxoqGSSBKCR bx7gytLQcrAwOMx3ywogDcQ0LVYkIdkgnE2h/JUIDVI2wM2Xc6IEVaRPFga7waJIQ7RuRFP3qS nHmUfcFtJKYjKqyYo308etJk3+44sRGxhjuiRm8GE6Px7e5ro1v/hJ4opLgltmWo0NJreXuAtj Gfn+41NbE+JI4plSpRMCSkp0Jr9UHxP1UcUzxSHGninuBb08kWt6/oB5XQpe2MBAAA= X-Change-ID: 20260606-airoha-ethtool-priv_flags-b6aa70caa780 To: Andrew Lunn , "David S. Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , Lorenzo Bianconi Cc: linux-arm-kernel@lists.infradead.org, linux-mediatek@lists.infradead.org, netdev@vger.kernel.org, Madhur Agrawal X-Mailer: b4 0.14.3 Add the capability to configure GDM3/GDM4 as WAN/LAN on demand when QoS offload is created or destroyed. Make dev->qdma an RCU pointer so the TX path can safely dereference it without holding RTNL. Introduce airoha_qdma_start() and airoha_qdma_stop() helpers. --- Changes in v4: - Move back QDMA TX/RX DMA enable to airoha_dev_open()/airoha_dev_stop(). - Configure GDM3/4 as WAN if GDM2 is not available in ndo_init() callback. - Protect qdma pointer in airoha_gdm_dev struct using RCU. - Rely on rtnl_dereference() to access qdma pointer in the control path. - Add airoha_qdma_start() and airoha_qdma_stop() utility routines in patch 1/2 - Link to v3: https://lore.kernel.org/r/20260608-airoha-ethtool-priv_flags-v3-1-3e8e3dc3f715@kernel.org Changes in v3: - Do not introduce ethtool private flags support to configure LAN/WAN for GDM3/4 and rely on tc qdisc offload for it instead. - Set GDM3/4 ports as LAN by default. - Move QDMA TX/RX DMA enable from airoha_dev_open() to airoha_probe() and the corresponding disable from airoha_dev_stop() to airoha_qdma_cleanup(). - Link to v2: https://lore.kernel.org/r/20260607-airoha-ethtool-priv_flags-v2-1-742c7aa1e182@kernel.org Changes in v2: - Rework airoha_dev_set_wan_flag routine - Enable GDM_STRIP_CRC_MASK in airoha_disable_gdm2_loopback() - Do not always reset REG_SRC_PORT_FC_MAP6 in airoha_disable_gdm2_loopback() but use the same condition used in airoha_enable_gdm2_loopback(). - Link to v1: https://lore.kernel.org/r/20260606-airoha-ethtool-priv_flags-v1-1-401b2c9fe9f1@kernel.org --- Lorenzo Bianconi (2): net: airoha: refactor QDMA start/stop into reusable helpers net: airoha: defer GDM3/GDM4 WAN mode and GDM2 loopback to QoS offload drivers/net/ethernet/airoha/airoha_eth.c | 273 +++++++++++++++++++++++++----- drivers/net/ethernet/airoha/airoha_eth.h | 24 ++- drivers/net/ethernet/airoha/airoha_ppe.c | 18 +- drivers/net/ethernet/airoha/airoha_regs.h | 1 + 4 files changed, 267 insertions(+), 49 deletions(-) --- base-commit: 5855479abc796c3b5d7b2f2ca147d68fc56cae1f change-id: 20260606-airoha-ethtool-priv_flags-b6aa70caa780 Best regards, -- Lorenzo Bianconi