From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from pdx-out-004.esa.us-west-2.outbound.mail-perimeter.amazon.com (pdx-out-004.esa.us-west-2.outbound.mail-perimeter.amazon.com [44.246.77.92]) (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 1807E34C121 for ; Mon, 19 Jan 2026 08:46:16 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=44.246.77.92 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1768812379; cv=none; b=nMbf5F2WEWYcrOyDiufKPKU+mLSe8VSPdllBaBT2mdo3QVowhh/AchNrRYFjj1rZN613qz7iFsP4ev7+8kPBCVEDoRATgJp9065XjeY01xqgfeR7meps2TWe5kNkSw81RND20JGIrbs0EA+rqhyEolK6sSEu9LKxXQQz+cHwe8k= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1768812379; c=relaxed/simple; bh=GuegJJv6x5gSyndzECz3Gpj7hwCX5l2fb61UWeMrYi8=; h=From:To:CC:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=HCAkhQe6fXLTLrz+UQ3+70ClfXzHbSkOAdjLNwSNtApoSmF5PHbf/p6CsACSEVQjOwE/x0e0Yhb5bgrn3uY3UcfVj7OQY8pL1QWAYGoqUsfadEhu9QIdeqW63GJ/lvC2aE7WW0xY5NGkrU3BiKQwQkFU1S35sCjFq8pT+8ABjiU= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=amazon.com; spf=pass smtp.mailfrom=amazon.co.jp; dkim=pass (2048-bit key) header.d=amazon.com header.i=@amazon.com header.b=YpRee5Ib; arc=none smtp.client-ip=44.246.77.92 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=amazon.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=amazon.co.jp Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=amazon.com header.i=@amazon.com header.b="YpRee5Ib" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=amazon.com; i=@amazon.com; q=dns/txt; s=amazoncorp2; t=1768812377; x=1800348377; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=R9oS2nKM1IPBYxWxTXCOu7kJf4dDn6+iSczw0BdZD6s=; b=YpRee5IbqqpHHlH1jo+rFctk5+ddv6wj8TcXE07MX2hVq20HSuzl9tJX 4nNTv3NwqFSkKwluamkEuveef39ZGz6sqBUlm9KLdTW5QetNNZcREV002 Bj88K6raKCFYMW1lsIQydb3ABnhB/HTLIi5z1aOEizi280qbBFomtNOuH yEdDHqbYPNNxOHYfN2by3rFut5E7yrNc4saVnyExwF+YOs5EegduIJCnj s/eLGJad9MhXsIAqHd8f6iSls38eow5v0TG5AFYrgMSgdFK48PPy6jarW gEaWtd0YHg7M4oKoPoBVrU6i2lIu4Fcrg9Fv/qIKkmcxaF1F3lFS41Nny g==; X-CSE-ConnectionGUID: OMGHLEjcSYCWqyhon8vG2Q== X-CSE-MsgGUID: JV6XATKDQqua4Msy+YZP/A== X-IronPort-AV: E=Sophos;i="6.21,237,1763424000"; d="scan'208";a="11111678" Received: from ip-10-5-6-203.us-west-2.compute.internal (HELO smtpout.naws.us-west-2.prod.farcaster.email.amazon.dev) ([10.5.6.203]) by internal-pdx-out-004.esa.us-west-2.outbound.mail-perimeter.amazon.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 19 Jan 2026 08:46:13 +0000 Received: from EX19MTAUWB001.ant.amazon.com [205.251.233.51:1152] by smtpin.naws.us-west-2.prod.farcaster.email.amazon.dev [10.0.27.220:2525] with esmtp (Farcaster) id dbcecbfb-a02e-458f-9e01-2cbb3669f167; Mon, 19 Jan 2026 08:46:13 +0000 (UTC) X-Farcaster-Flow-ID: dbcecbfb-a02e-458f-9e01-2cbb3669f167 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; Mon, 19 Jan 2026 08:46:13 +0000 Received: from 603e5f7bc1fe.amazon.com (10.37.245.10) 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; Mon, 19 Jan 2026 08:46:11 +0000 From: Takashi Kozu To: CC: , , , , , , , , , , , Takashi Kozu Subject: [PATCH iwl-next v3 1/3] igb: prepare for RSS key get/set support Date: Mon, 19 Jan 2026 17:45:05 +0900 Message-ID: <20260119084511.95287-6-takkozu@amazon.com> X-Mailer: git-send-email 2.47.0 In-Reply-To: <20260119084511.95287-5-takkozu@amazon.com> References: <20260119084511.95287-5-takkozu@amazon.com> Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Content-Type: text/plain X-ClientProxiedBy: EX19D042UWA003.ant.amazon.com (10.13.139.44) To EX19D001UWA001.ant.amazon.com (10.13.138.214) 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; } +/** + * igb_write_rss_key - Program the RSS key into device registers + * @adapter: board private structure + * + * Write the RSS key stored in adapter->rss_key to the E1000 hardware registers. + * Each 32-bit chunk of the key is read using get_unaligned_le32() and written + * to the appropriate register. + */ +void igb_write_rss_key(struct igb_adapter *adapter) +{ + ASSERT_RTNL(); + + struct e1000_hw *hw = &adapter->hw; + + for (int i = 0; i < IGB_RSS_KEY_SIZE / 4; i++) { + u32 val = get_unaligned_le32(&adapter->rss_key[i * 4]); + + wr32(E1000_RSSRK(i), val); + } +} + static int igb_get_eee(struct net_device *netdev, struct ethtool_keee *edata) { struct igb_adapter *adapter = netdev_priv(netdev); diff --git a/drivers/net/ethernet/intel/igb/igb_main.c b/drivers/net/ethernet/intel/igb/igb_main.c index 85f9589cc568..568f491053ce 100644 --- a/drivers/net/ethernet/intel/igb/igb_main.c +++ b/drivers/net/ethernet/intel/igb/igb_main.c @@ -4050,6 +4050,9 @@ static int igb_sw_init(struct igb_adapter *adapter) pci_read_config_word(pdev, PCI_COMMAND, &hw->bus.pci_cmd_word); + /* init RSS key */ + netdev_rss_key_fill(adapter->rss_key, sizeof(adapter->rss_key)); + /* set default ring sizes */ adapter->tx_ring_count = IGB_DEFAULT_TXD; adapter->rx_ring_count = IGB_DEFAULT_RXD; @@ -4525,11 +4528,8 @@ static void igb_setup_mrqc(struct igb_adapter *adapter) struct e1000_hw *hw = &adapter->hw; u32 mrqc, rxcsum; u32 j, num_rx_queues; - u32 rss_key[10]; - netdev_rss_key_fill(rss_key, sizeof(rss_key)); - for (j = 0; j < 10; j++) - wr32(E1000_RSSRK(j), rss_key[j]); + igb_write_rss_key(adapter); num_rx_queues = adapter->rss_queues; -- 2.52.0