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20 Jan 2026 04:09:51 +0000 Received: from EX19MTAUWB001.ant.amazon.com [205.251.233.51:23499] by smtpin.naws.us-west-2.prod.farcaster.email.amazon.dev [10.0.8.231:2525] with esmtp (Farcaster) id 93351dc0-42f3-42df-8453-5ad81db6cc28; Tue, 20 Jan 2026 04:09:51 +0000 (UTC) X-Farcaster-Flow-ID: 93351dc0-42f3-42df-8453-5ad81db6cc28 Received: from EX19D001UWA001.ant.amazon.com (10.13.138.214) by EX19MTAUWB001.ant.amazon.com (10.250.64.248) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA) id 15.2.2562.35; Tue, 20 Jan 2026 04:09:48 +0000 Received: from 603e5f7bc1fe.amazon.com (10.37.244.13) by EX19D001UWA001.ant.amazon.com (10.13.138.214) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA) id 15.2.2562.35; Tue, 20 Jan 2026 04:09:46 +0000 From: Takashi Kozu To: CC: , , , , , , , , , , , , Date: Tue, 20 Jan 2026 13:09:39 +0900 Message-ID: <20260120040938.95789-2-takkozu@amazon.com> X-Mailer: git-send-email 2.47.0 In-Reply-To: References: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Content-Type: text/plain X-Originating-IP: [10.37.244.13] X-ClientProxiedBy: EX19D041UWB003.ant.amazon.com (10.13.139.176) To EX19D001UWA001.ant.amazon.com (10.13.138.214) X-Mailman-Original-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=amazon.com; i=@amazon.com; q=dns/txt; s=amazoncorp2; t=1768882194; x=1800418194; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=O9ZU9K6r9ey5QSCUFUoJneb2msolBKA4lldbC697eK0=; b=mFwgFSHUcf7z49D71Jxg/kAvm5WftXJ2OS2HfCMa0RJL/ep5B3AG3/4n hsKImIIZVxEDjQKrrMrAEiYiHeRngPtOFKoCXXdKwgvDKu9gM9Mm2Pj6J O7bzrhsdW1gMmu/KXTTkTTbPyYUCHR7OWX5yw2x73ANVSDDlF5JOg8o4u W4gUXEHuYgh9W8XE6m2PwzhCdsxXdXvQ2nmrCJ/wYuV+kaVUHgrSyPJWx ExA+UFhtIF+sVVF2VDFduxCvtUSHBAqUkri5ald+enCB3kagGW3ev4HnQ T0KbA4CnqqWRqy5SW8z7eIrSAnr95Nw/sFUtoQZVDHuDebKp+7rAfrY5y g==; X-Mailman-Original-Authentication-Results: smtp1.osuosl.org; dmarc=pass (p=quarantine dis=none) header.from=amazon.com X-Mailman-Original-Authentication-Results: smtp1.osuosl.org; dkim=pass (2048-bit key, unprotected) header.d=amazon.com header.i=@amazon.com header.a=rsa-sha256 header.s=amazoncorp2 header.b=mFwgFSHU Subject: Re: [Intel-wired-lan] [PATCH iwl-next v3 1/3] igb: prepare for RSS key get/set support X-BeenThere: intel-wired-lan@osuosl.org X-Mailman-Version: 2.1.30 Precedence: list List-Id: Intel Wired Ethernet Linux Kernel Driver Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: intel-wired-lan-bounces@osuosl.org Sender: "Intel-wired-lan" > From: "Loktionov, Aleksandr" > To: Takashi Kozu , > "Nguyen, Anthony L" > Cc: "Kitszel, Przemyslaw" , > "andrew+netdev@lunn.ch" , > "davem@davemloft.net" , > "edumazet@google.com" , > "kuba@kernel.org" , > "pabeni@redhat.com" , > "intel-wired-lan@lists.osuosl.org" > , > "netdev@vger.kernel.org" , > "pmenzel@molgen.mpg.de" , > "Kwapulinski, Piotr" > Subject: Re: [Intel-wired-lan] [PATCH iwl-next v3 1/3] igb: prepare for RSS key get/set support > Date: Mon, 19 Jan 2026 10:19:02 +0000 [thread overview] > Message-ID: (raw) > In-Reply-To: <20260119084511.95287-6-takkozu@amazon.com> > > > > > -----Original Message----- > > From: Takashi Kozu > > Sent: Monday, January 19, 2026 9:45 AM > > To: Nguyen, Anthony L > > Cc: Kitszel, Przemyslaw ; > > andrew+netdev@lunn.ch; davem@davemloft.net; edumazet@google.com; > > kuba@kernel.org; pabeni@redhat.com; intel-wired-lan@lists.osuosl.org; > > netdev@vger.kernel.org; Loktionov, Aleksandr > > ; pmenzel@molgen.mpg.de; Kwapulinski, > > Piotr ; Takashi Kozu > > Subject: [PATCH iwl-next v3 1/3] igb: prepare for RSS key get/set > > support > > > > Store the RSS key inside struct igb_adapter and introduce the > > igb_write_rss_key() helper function. This allows the driver to program > > the E1000 registers using a persistent RSS key, instead of using a > > stack-local buffer in igb_setup_mrqc(). > > > > Signed-off-by: Takashi Kozu > > --- > > drivers/net/ethernet/intel/igb/igb.h | 3 +++ > > drivers/net/ethernet/intel/igb/igb_ethtool.c | 21 > > ++++++++++++++++++++ > > drivers/net/ethernet/intel/igb/igb_main.c | 8 ++++---- > > 3 files changed, 28 insertions(+), 4 deletions(-) > > > > diff --git a/drivers/net/ethernet/intel/igb/igb.h > > b/drivers/net/ethernet/intel/igb/igb.h > > index 0fff1df81b7b..8c9b02058cec 100644 > > --- a/drivers/net/ethernet/intel/igb/igb.h > > +++ b/drivers/net/ethernet/intel/igb/igb.h > > @@ -495,6 +495,7 @@ struct hwmon_buff { > > #define IGB_N_PEROUT 2 > > #define IGB_N_SDP 4 > > #define IGB_RETA_SIZE 128 > > +#define IGB_RSS_KEY_SIZE 40 > > > > enum igb_filter_match_flags { > > IGB_FILTER_FLAG_ETHER_TYPE = 0x1, > > @@ -655,6 +656,7 @@ struct igb_adapter { > > struct i2c_client *i2c_client; > > u32 rss_indir_tbl_init; > > u8 rss_indir_tbl[IGB_RETA_SIZE]; > > + u8 rss_key[IGB_RSS_KEY_SIZE]; > > > > unsigned long link_check_timeout; > > int copper_tries; > > @@ -735,6 +737,7 @@ void igb_down(struct igb_adapter *); void > > igb_reinit_locked(struct igb_adapter *); void igb_reset(struct > > igb_adapter *); int igb_reinit_queues(struct igb_adapter *); > > +void igb_write_rss_key(struct igb_adapter *adapter); > > void igb_write_rss_indir_tbl(struct igb_adapter *); int > > igb_set_spd_dplx(struct igb_adapter *, u32, u8); int > > igb_setup_tx_resources(struct igb_ring *); diff --git > > a/drivers/net/ethernet/intel/igb/igb_ethtool.c > > b/drivers/net/ethernet/intel/igb/igb_ethtool.c > > index 10e2445e0ded..5107b0de4fa3 100644 > > --- a/drivers/net/ethernet/intel/igb/igb_ethtool.c > > +++ b/drivers/net/ethernet/intel/igb/igb_ethtool.c > > @@ -3016,6 +3016,27 @@ static int igb_set_rxnfc(struct net_device > > *dev, struct ethtool_rxnfc *cmd) > > return ret; > > } > > > > +/** > > + info.plist igb_write_rss_key - Program the RSS key into device registers > > + info.plist @adapter: board private structure > > + info.plist > > + info.plist Write the RSS key stored in adapter->rss_key to the E1000 hardware > > registers. > > + info.plist Each 32-bit chunk of the key is read using get_unaligned_le32() > > and > > +written > > + info.plist to the appropriate register. > > + */ > > +void igb_write_rss_key(struct igb_adapter *adapter) { > Opening brace placement violates kernel coding style. For functions, > the opening brace should be on the next line, not on the same line as the function declaration. > Or is it my mail-client issue? >From my side, the opening brace is correctly on the next line. ``` +void igb_write_rss_key(struct igb_adapter *adapter) +{ ``` > > + ASSERT_RTNL(); > > + > > + struct e1000_hw *hw = &adapter->hw; > Declarations should be at the start of the block. > I think ASSERT_RTNL(); can be moved down safely? Thanks for pointing out. I'll fix this.