From mboxrd@z Thu Jan 1 00:00:00 1970 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 bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 2916BCD5BC9 for ; Wed, 27 May 2026 10:21:41 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:Cc:To: Content-Transfer-Encoding:Content-Type:MIME-Version:Message-Id:Date:Subject: From:Reply-To:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:In-Reply-To:References: List-Owner; bh=GCDBQyOqO+wkKS4SzAvFryKV14tQQLMUO7YZ3xM4bRo=; b=JgL5Nq0FV5bT/l 1fvWFWNKJvlovJiSg2Pa4q1vQ339qXunBIk9zvOfZ99Ljv6KZSrYQGcL4SCdIEmoK6lNCTYzUWZZU BmLhi8SX+/96dRndr1xbfq6Wp17wXs2uvv2DA9wq8ftw0nGYxYWFde4Azfk/yKWbznQn4jxJXBUsS wX1xza/pupc3UQlLo4VbNxjR8fQvRYiwqcGAsFMF7+V3R2ul92qNwzfQARzGn0w/gjE3i72cH46md XLdG0xu9y2TkvuEVUYQeJB1as339ztX1om52/kk+I6MnTWp+dLXQiLijcD6emLN7NWcSZ30eAn4S6 XNPKwrFsa+N8QzZej/jQ==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.99.1 #2 (Red Hat Linux)) id 1wSBOJ-00000003oTL-0MyZ; Wed, 27 May 2026 10:21:35 +0000 Received: from tor.source.kernel.org ([2600:3c04:e001:324:0:1991:8:25]) by bombadil.infradead.org with esmtps (Exim 4.99.1 #2 (Red Hat Linux)) id 1wSBOH-00000003oSG-46zH; Wed, 27 May 2026 10:21:34 +0000 Received: from smtp.kernel.org (quasi.space.kernel.org [100.103.45.18]) by tor.source.kernel.org (Postfix) with ESMTP id 0CA29600AB; Wed, 27 May 2026 10:21:33 +0000 (UTC) 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> 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 X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org 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