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 BECB63E867F for ; Wed, 27 May 2026 10:21:33 +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=1779877295; cv=none; b=Pr1fmuy0jMm7q8+ETjs57c25TCZgraQXCpW7Q+W9wLewpa0QL9RFOa4BAujJAizKsc2EHHtJcVNuYsfNwotwt14dxOaiAF+vmmrAMBf9JvAwlWw6RjVlIEIC1VXuEe1QfTD3CVgtGua+Fx7gu0biaA2wwDOdBEOLRtXgJf/gjO8= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1779877295; c=relaxed/simple; bh=Hb5mmUyG+wBrn6VfqA5DOGUO30RVbi40UdpuJZ1U48w=; h=From:Subject:Date:Message-Id:MIME-Version:Content-Type:To:Cc; b=AF9CA3GKTMlhbuEyrdGcTRyu9aeU8qOMz7Ztg2pLrxRvE3aT1EOWe+ERXMSmtcKWkEY46M1vayLv4sQcpwbDgM9skzQgOKTVm379bsZINi2JWRPi1/aLpUin6l/0VoGcuG5zKwVQkFS2M3UzbLEEeezq9Q4l9BueY0kvwQPRxRc= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=P/NqUaoH; 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="P/NqUaoH" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 3719D1F000E9; Wed, 27 May 2026 10:21:32 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1779877292; bh=GCDBQyOqO+wkKS4SzAvFryKV14tQQLMUO7YZ3xM4bRo=; h=From:Subject:Date:To:Cc; b=P/NqUaoHvULOOBMbnPno7nkQDdfZa4eFiHLySPdjY4k5Ig7q3Vfdfa8YI5ace68bb nUmhGtar791JCXurQFWy3J+tNQrRDkMqL3Q4RevNgS8TBkCRZmdzR6Acmzccox8vAZ HB6pS0p1O6qK0XOU1uJTozZMmGgzahov4CYS1rH7ZuH6kOXOvxFYkE8GACK7CFNrkd NVePQIO9BlVFfpc7rctOoeja53Wr6ppqdhTjZWv/qsUtQvWO+hagUXDZHuYwATrwTb LuO2dUKgPUElESMTror7TmBzX3lHMmn5jYtqsKCbbPVSBIw7eh3adZhcamiJaCof+4 OB7BEQgbq2w7w== From: Lorenzo Bianconi Subject: [PATCH net-next 0/6] net: airoha: Preliminary patches to support multiple net_devices connected to the same GDM port Date: Wed, 27 May 2026 12:21:14 +0200 Message-Id: <20260527-airoha-eth-multi-serdes-preliminary-v1-0-ec6ed73ef7fc@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: 8bit X-B4-Tracking: v=1; b=H4sIAAAAAAAC/x2NQQqDQAwAvyI5N7AGtdCvlB62mu0GNJbsWizi3 xt6HAZmDihswgVuzQHGHymyqkN7aWDMUV+MMjkDBRpCT1eMYmuOyDXjss1V0AMTF3wbz7KIRvt i31Lo0nPoKI3gJXdJ9v/lDsoVlfcKj/P8AU/XkBx/AAAA X-Change-ID: 20260527-airoha-eth-multi-serdes-preliminary-51204fb642fc To: Andrew Lunn , "David S. Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni Cc: Simon Horman , linux-arm-kernel@lists.infradead.org, linux-mediatek@lists.infradead.org, netdev@vger.kernel.org, Xuegang Lu , Lorenzo Bianconi X-Mailer: b4 0.14.3 EN7581 or AN7583 SoCs support connecting multiple external SerDes (e.g. Ethernet or USB SerDes) to GDM3 or GDM4 ports via a hw arbiter that manages the traffic in a TDM manner. As a result multiple net_devices can connect to the same GDM{3,4} port and there is a theoretical "1:n" relation between GDM ports and net_devices. ┌─────────────────────────────────┐ │ │ ┌──────┐ │ P1 GDM1 ├────►MT7530│ │ │ └──────┘ │ │ ETH0 (DSA conduit) │ │ │ PSE/FE │ │ │ │ │ │ │ ┌─────┐ │ P0 CDM1 ├────►QDMA0│ │ P4 P9 GDM4 │ └─────┘ └──┬─────────────────────────┬────┘ │ │ ┌──▼──┐ ┌────▼────┐ │ PPE │ │ ARB │ └─────┘ └─┬─────┬─┘ │ │ ┌──▼──┐┌─▼───┐ │ ETH ││ USB │ └─────┘└─────┘ ETH1 ETH2 This is a preliminary series to introduce support for multiple net_devices connected to the same Frame Engine (FE) GDM port (GDM3 or GDM4) via an external hw arbiter. --- Lorenzo Bianconi (6): net: airoha: Introduce airoha_gdm_dev struct net: airoha: Move airoha_qdma pointer in airoha_gdm_dev struct net: airoha: Rely on airoha_gdm_dev pointer in airoha_is_lan_gdm_port() net: airoha: Move qos_sq_bmap in airoha_gdm_dev struct net: airoha: Move {cpu,fwd}_tx_packets in airoha_gdm_dev struct net: airoha: Rename airoha_set_gdm2_loopback in airoha_enable_gdm2_loopback drivers/net/ethernet/airoha/airoha_eth.c | 445 ++++++++++++++++++------------- drivers/net/ethernet/airoha/airoha_eth.h | 35 ++- drivers/net/ethernet/airoha/airoha_ppe.c | 34 +-- 3 files changed, 297 insertions(+), 217 deletions(-) --- base-commit: aa064a614efcfa4c300609d1f01134e99a12ad10 change-id: 20260527-airoha-eth-multi-serdes-preliminary-51204fb642fc Best regards, -- Lorenzo Bianconi