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 8C639C2BD09 for ; Sat, 6 Jul 2024 12:28:28 +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:In-Reply-To:Content-Type: MIME-Version:References:Message-ID:Subject:Cc:To:From:Date:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=VPhicP6tXZWFjWdHAybgPc298sPPx3RLK6IUn5be7fY=; b=3Eh4bxzwizJ3lpJztP/rAZUO5Q LrQFHHZvbU2HXv7L8yRtT680G9BkZUY3NjyOWTlYnXmQFrgr+YkGUs4PGUxG7y/99Kd/rGl8Pb+TB GyvloKAUWiZ2WmS/EfPgHJL7OGmZWxC6fA4BX6WtYq1HDgpGbCrzBz+f2FLkiMr4osPhVFag9afuM p1S/z2Wf6hyXVhc6LAWpRCSwFaWR+Pknzh1ZpWLRJe8OAWawXhLzdeCm+4xTPXK6m3X9PbfAXQjl+ Mqd9t25VDOJSee4YeRQCvQGP5UXJ7pVGQGcQzeGagcR7OyQaH9tByQjvtSBDqDjgL1fJhX48JXmmM bLC9ozdQ==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.97.1 #2 (Red Hat Linux)) id 1sQ4WW-00000000CjD-0KKK; Sat, 06 Jul 2024 12:28:16 +0000 Received: from dfw.source.kernel.org ([139.178.84.217]) by bombadil.infradead.org with esmtps (Exim 4.97.1 #2 (Red Hat Linux)) id 1sQ4WI-00000000Cgx-0Jx1 for linux-arm-kernel@lists.infradead.org; Sat, 06 Jul 2024 12:28:03 +0000 Received: from smtp.kernel.org (transwarp.subspace.kernel.org [100.75.92.58]) by dfw.source.kernel.org (Postfix) with ESMTP id 3DA6E61C14; Sat, 6 Jul 2024 12:28:01 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id A2598C2BD10; Sat, 6 Jul 2024 12:27:56 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1720268880; bh=hsYaAdB5PnzdQQq7GR2Msbjo7dWt4Vmkj2ad3a4XiRk=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=so7RMjU3NsjXWp5FEx5op21IqqozTWuj8GJb0tp/8EVgD5xr0lWBNdKDZsFwr+soi x1aQ0mxuv2cxkA5/E06e0v/jtQkHTBLo/K7RrGLNcOzJBRN4jG7dvHku5JJ4MXYfjf pW1YBQBHGW9AWmBIdO3ffJ+MiF40O5kDTszdNKIVG0dyIWUu0oBmp7Hl6YG+k23kLZ 3Y4aU6X3cmrwp3AMIWFxbHOU+BqBaLsytQ3j0nJBqznlPAYx3dL4pcaakC4/ViDZvt F+Na3T6qdMpLJGPj0kTJGx/qdJjumMdXKHSk8JiZ32Mt6N/BzVMuIpR/xetB6FhBXS HWYX+FJwnfygw== Date: Sat, 6 Jul 2024 13:27:54 +0100 From: Simon Horman To: Lorenzo Bianconi Cc: netdev@vger.kernel.org, nbd@nbd.name, lorenzo.bianconi83@gmail.com, davem@davemloft.net, edumazet@google.com, kuba@kernel.org, pabeni@redhat.com, conor@kernel.org, linux-arm-kernel@lists.infradead.org, robh+dt@kernel.org, krzysztof.kozlowski+dt@linaro.org, conor+dt@kernel.org, devicetree@vger.kernel.org, catalin.marinas@arm.com, will@kernel.org, upstream@airoha.com, angelogioacchino.delregno@collabora.com, benjamin.larsson@genexis.eu, rkannoth@marvell.com, sgoutham@marvell.com, andrew@lunn.ch, arnd@arndb.de Subject: Re: [PATCH v5 net-next 2/2] net: airoha: Introduce ethernet support for EN7581 SoC Message-ID: <20240706122754.GD1481495@kernel.org> References: <18e837f0f9377b68302d42ec9174473046a4a30a.1720079772.git.lorenzo@kernel.org> <20240705190644.GB1480790@kernel.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20240706_052802_271682_9D8E2891 X-CRM114-Status: GOOD ( 26.57 ) 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 On Sat, Jul 06, 2024 at 10:27:00AM +0200, Lorenzo Bianconi wrote: > > On Thu, Jul 04, 2024 at 10:08:11AM +0200, Lorenzo Bianconi wrote: > > > Add airoha_eth driver in order to introduce ethernet support for > > > Airoha EN7581 SoC available on EN7581 development board (en7581-evb). > > > en7581-evb networking architecture is composed by airoha_eth as mac > > > controller (cpu port) and a mt7530 dsa based switch. > > > EN7581 mac controller is mainly composed by Frame Engine (FE) and > > > QoS-DMA (QDMA) modules. FE is used for traffic offloading (just basic > > > functionalities are supported now) while QDMA is used for DMA operation > > > and QOS functionalities between mac layer and the dsa switch (hw QoS is > > > not available yet and it will be added in the future). > > > Currently only hw lan features are available, hw wan will be added with > > > subsequent patches. > > > > > > Tested-by: Benjamin Larsson > > > Signed-off-by: Lorenzo Bianconi > > > > ... > > > > > +static const char * const airoha_ethtool_stats_name[] = { > > > + "tx_eth_pkt_cnt", > > > + "tx_eth_byte_cnt", > > > + "tx_ok_pkt_cnt", > > > + "tx_ok_byte_cnt", > > > + "tx_eth_drop_cnt", > > > + "tx_eth_bc_cnt", > > > + "tx_eth_mc_cnt", > > > + "tx_eth_lt64_cnt", > > > + "tx_eth_eq64_cnt", > > > + "tx_eth_65_127_cnt", > > > + "tx_eth_128_255_cnt", > > > + "tx_eth_256_511_cnt", > > > + "tx_eth_512_1023_cnt", > > > + "tx_eth_1024_1518_cnt", > > > + "tx_eth_gt1518_cnt", > > > + "rx_eth_pkt_cnt", > > > + "rx_eth_byte_cnt", > > > + "rx_ok_pkt_cnt", > > > + "rx_ok_byte_cnt", > > > + "rx_eth_drop_cnt", > > > + "rx_eth_bc_cnt", > > > + "rx_eth_mc_cnt", > > > + "rx_eth_crc_drop_cnt", > > > + "rx_eth_frag_cnt", > > > + "rx_eth_jabber_cnt", > > > + "rx_eth_lt64_cnt", > > > + "rx_eth_eq64_cnt", > > > + "rx_eth_65_127_cnt", > > > + "rx_eth_128_255_cnt", > > > + "rx_eth_256_511_cnt", > > > + "rx_eth_512_1023_cnt", > > > + "rx_eth_1024_1518_cnt", > > > + "rx_eth_gt1518_cnt", > > > +}; > > > > Hi Lorenzo, > > > > Sorry for not noticing this earlier. > > Hi Simon, > > no worries :) > > > It seems to me that some of the stats above could > > use standard stats, which is preferred. > > Please correct me if I am wrong but it seems quite a common approach to have > same stats in both .ndo_get_stats64() and .get_ethtool_stats(): > - https://github.com/torvalds/linux/blob/master/drivers/net/ethernet/mediatek/mtk_eth_soc.c#L212 > - https://github.com/torvalds/linux/blob/master/drivers/net/ethernet/marvell/mvneta.c#L435 > - https://github.com/torvalds/linux/blob/master/drivers/net/ethernet/intel/i40e/i40e_ethtool.c#L243 > - https://github.com/torvalds/linux/blob/master/net/mac80211/ethtool.c#L52 > - ... > > Do you mean I should just report common stats (e.g. tx_packets or tx_bytes) in > .ndo_get_stats64()? Or it is fine to just add .ndo_get_stats64() callback (not > supported at the moment)? The first option: It is my understanding that it preferred to only report common stats via ndo_get_stats64. "Please limit stats you report in ethtool -S to just the stats for which proper interfaces don't exist. Don't duplicate what's already reported via rtase_get_stats64(), also take a look at what can be reported via various *_stats members of struct ethtool_ops." - Re: [PATCH net-next v18 10/13] rtase: Implement ethtool function by Jakub Kicinski https://lore.kernel.org/netdev/20240509204047.149e226e@kernel.org/ > > Basically, my understanding is that one should: > > 1. Implement .ndo_get_stats64 > > (that seems relevant here) > > 2. As appropriate implement ethtool_stats non-extended stats operations > > (perhaps not relevant here) > > Can you please provide me a pointer for it? Sorry, that was not at all clear. I meant, as per the quote above, *_stats members of struct ethtool_ops, other than those that implement extended ops. e.g. get_rmon_stats. > > Regards, > Lorenzo > > > 3. Then implement get_ethtool_stats for what is left over > > > > ...