From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-wm1-f51.google.com (mail-wm1-f51.google.com [209.85.128.51]) (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 B2F7A391E78 for ; Sun, 30 Aug 2026 07:58:19 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.128.51 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1788076705; cv=none; b=cU0OS65WxyCy2n6sLy5TexwNXrABRMF42arqrqDqXPoqicFOMZ/fpoihhsyoA0TW0EM3yINDR+lTNF2gGw11YGy8jLOZdF0Q1hL1S0SwpAnND6fPg9fy6J3OYetEL0toXRWX6UKbtt6R2Ci7PxrtnSgb3M9NjFz+DVky15UWh4I= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1788076705; c=relaxed/simple; bh=jegzOw+EXJIP4W/35cQGumTCQXocudJkdz7vv0uyPE8=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=goYKfgAZXnCS9SqZK6ZNFd5xoMrqhzevM5YIRMsI1ekhcGBx3YsZeAtmc5ivvhhnJVgxDnfEIlK2lGKm3Cvc3GmrvSURC7jUPouhTLrmPhFkCMkQabiBAK7Zm91jQiClUbr914hFmVGGZ6U7tGjtCw6wX4ScNeGy8OsQptRViCA= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com; spf=pass smtp.mailfrom=gmail.com; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b=dIMGFTD3; arc=none smtp.client-ip=209.85.128.51 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=gmail.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="dIMGFTD3" Received: by mail-wm1-f51.google.com with SMTP id 5b1f17b1804b1-498028b3d5eso26022755e9.1 for ; Sun, 30 Aug 2026 00:58:19 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20251104; t=1788076696; x=1788681496; 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:content-type; bh=+j1AD6ZP4+NwsaE6HRfrB5G8mDdyvb/fqBpbDqu3VZE=; b=dIMGFTD34cL9Vp75CFV88Ji/ud6Q61woZTjg2Bh1TNJjNi7ef1uJWzbmNQy1TDX2aM yeK8qjhzkGiZZAuNS6xwGRmUe4kNbgKCL0FbhRTTm2vt8ZSWLnrXo92j/gy03NsPtT17 GrUwmZmIUkczBgUU52rALxI3qa4QbaqK9K6zy7glSUgz5QMZwaXb1uI+vui44B27WzrS 604b3ER5kPVzt5NGyOcZY73Pl6FfaXUTL+EMmy45RHIjD4MPVUzJaju34ozBTshwE17q zFtSfHbyhFlJUlWIMjUQ+8hahc8Vbl4A1K5a/RjQQcz/vwciaWgMbyqgtjtO+Wp38sTW ddsQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1788076696; x=1788681496; 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:content-type; bh=+j1AD6ZP4+NwsaE6HRfrB5G8mDdyvb/fqBpbDqu3VZE=; b=YCTMP9Y7Vyh+xFhY7zAU3zptWWSCEdzmXD5aCkwGNuGIruXtldmlP3vDZrRi35TZAa R9K44XRvj6t1r5aFApyRvpb6bw0511fvO2HJaNrikadKO/kZQpurDGMCQjAYZGmYyWUo q9CJPQWNMFR+K6SmnZev6ivM65jSMP9tWW4If1u/JmvPcTq2q/QvxoixEOffs5Fj96Ia kBozLfVgQdDPSVuo0sAWj4rOSZAG0Op3s7XYypJjcJ/irIiTrOnsyy1XdHGb0MUGmeee LHULJu+a3NXQWugsTmLpsdwGMZNLVChIpNBq6tOT77HZq3dgxoJnwi+h0OuAvf+6C2Ht 7cPw== X-Forwarded-Encrypted: i=1; AHgh+RoURWo+RsCDCNq4nHFTwkNXvXQWT6NJCLn6Dut8Mlb1zpfMDggsTypBZeBlvGiyDxkIgWsybLU=@vger.kernel.org X-Gm-Message-State: AFuF++lr5egfXcWyof7g6elZDKB2XTS4l3qSKE03AOZipkLvu5TD3v36 l1ohrlA+3U9j8WhwtwLWSCJGYEIjaICJ/0rDg0wTKyfGnzahkM4SrNg= X-Gm-Gg: AR+sD13vk1Z9qiJdJVA4FeDi4ccU2oDcjHLE7aREUSr0d8pTR3AaGI/4+v78wv+YVTT vrncDIvxbl4STFW8irKwb8hHCIiD8pUZjay4nL9bK7PthbOUASIaoNFrcKe4efd4tDmCoINK3rD EAzXU4sPkv3f+o7g4UtjW50kABdEkN0jTL06i/GxNGJv+dy7812W2xC6xxJmMb5oHQiu3zpAfYQ JLyNB+t+GjX3rGyxSyxD87fuxkcnnDSsIfnaAQKOcWRoM21+6gNk/0NYD41omHmSLsOfJy8G0nS KGiLXwNUd55xfBTTjfXEXVwhOETKiNlUPVikLs53adteL/4LOWUOYaC6Ws0nl6suBS4h/wMq7uL iaKobmQtNdXT7gd3e3IZASmAoJdt9KRv3QB8oWi0MdhDDCNApiB/x4+2jMsGyXCfpwfNCrU1/Mi F41SXkthodICltVtwXBlBZ9pk7RuQMH+v18yB1szdTRClt8vgcLhg= X-Received: by 2002:a05:600c:8b35:b0:499:7a19:408b with SMTP id 5b1f17b1804b1-49b91c3b71dmr267281245e9.11.1788076696142; Sun, 30 Aug 2026 00:58:16 -0700 (PDT) Received: from fedora ([46.8.219.5]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-49cd53a4678sm14757875e9.13.2026.08.30.00.58.15 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sun, 30 Aug 2026 00:58:15 -0700 (PDT) From: Vitaliy Sochnev To: Lorenzo Bianconi , netdev@vger.kernel.org Cc: Andrew Lunn , "David S . Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , linux-mediatek@lists.infradead.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, Vitaliy Sochnev Subject: [PATCH net-next 4/4] net: airoha: grow RX ring 4 to 128 descriptors Date: Sun, 30 Aug 2026 10:57:17 +0100 Message-ID: <20260830095717.37218-5-sochnev.v.74@gmail.com> X-Mailer: git-send-email 2.55.0 In-Reply-To: <20260830095717.37218-1-sochnev.v.74@gmail.com> References: <20260830095717.37218-1-sochnev.v.74@gmail.com> Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Ring 4 is the shared "force to CPU" ring for a wide set of protocols (BOOTP, PPPoE Discovery, PPP LCP/IPCP/CHAP/IPv6CP/PAP, ISAKMP, DHCPv6, SIP, LLDP, ...) and currently falls into the 16-descriptor default in RX_DSCP_NUM(), same as most other non-hashed rings. The hw completion race recovered by airoha_qdma_rx_check_stall()/rx_recover_work() in the previous commits appears strongly correlated with a ring going from idle to receiving its first frame(s) - exactly the access pattern this shared ring sees under protocol negotiation bursts. Give it the same 128-descriptor allowance already used for rings 2/11/15, matching the other rings that see bursty, non-hashed traffic, to reduce how often that condition is hit in the first place. Ring 4 and the VIP classification that forces these protocols onto it are shared driver-wide, with no DT/hardware property distinguishing one chip variant's ring 4 from another's, so this isn't scoped to AN7583 specifically even though that's where the race was found and reproduced. 24h+ stress runs forcing repeated PPPoE/DHCP renegotiation on an AN7581 board, both with and without the two preceding fixes, completed 570+ forced reconnect cycles each with no regressions from the larger ring. Signed-off-by: Vitaliy Sochnev --- drivers/net/ethernet/airoha/airoha_eth.h | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/net/ethernet/airoha/airoha_eth.h b/drivers/net/ethernet/airoha/airoha_eth.h index d6591a779743..cd75c16d8d0c 100644 --- a/drivers/net/ethernet/airoha/airoha_eth.h +++ b/drivers/net/ethernet/airoha/airoha_eth.h @@ -41,6 +41,7 @@ #define TX_DSCP_NUM 1024 #define RX_DSCP_NUM(_n) \ ((_n) == 2 ? 128 : \ + (_n) == 4 ? 128 : \ (_n) == 11 ? 128 : \ (_n) == 15 ? 128 : \ (_n) == 0 ? 1024 : 16) -- 2.55.0