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 X-Spam-Level: X-Spam-Status: No, score=-10.1 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 0D850C35669 for ; Sun, 23 Feb 2020 02:31:44 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id D5BF920659 for ; Sun, 23 Feb 2020 02:31:43 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1582425103; bh=rZgYp4t3YarOTqEyv1BmTShhj8LChio37MMcCWbSDBk=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=D3qr+jBuFogyDvXYNjnkUKXtK0AfzGZFlH7Vbpm0h/i19v8Jh5whjeLkWuzUaa1YP zJQ8i8HNebM+pMhQ2l7FjTaCw8xrUlCopjRdA4fRRu7gkvckDpF5t7STo4gwB1bV0V 3ZkWzgWVcScOBxCg7hieyHpGDnTp09sdfWwnbBjk= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728216AbgBWCbm (ORCPT ); Sat, 22 Feb 2020 21:31:42 -0500 Received: from mail.kernel.org ([198.145.29.99]:52826 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728613AbgBWCXU (ORCPT ); Sat, 22 Feb 2020 21:23:20 -0500 Received: from sasha-vm.mshome.net (c-73-47-72-35.hsd1.nh.comcast.net [73.47.72.35]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id E5DC2208C3; Sun, 23 Feb 2020 02:23:18 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1582424599; bh=rZgYp4t3YarOTqEyv1BmTShhj8LChio37MMcCWbSDBk=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=enGLpPLLi4u395t9PbpjTIA6uPmwXQ1vbY2M7t4hyBqIYO3icEspCJo1yHcayov6+ Q5Bekj5PEDn+9LQsxa0L/0kLvhKuhG8ozg7QovbbEVfkRy19PAX7hId1aDB++tayj8 pp9vpTSkCwdulk245xmF3R03/nzv6EHitHkNpJLM= From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Arthur Kiyanovski , Sameeh Jubran , "David S . Miller" , Sasha Levin , netdev@vger.kernel.org Subject: [PATCH AUTOSEL 5.4 36/50] net: ena: fix incorrectly saving queue numbers when setting RSS indirection table Date: Sat, 22 Feb 2020 21:22:21 -0500 Message-Id: <20200223022235.1404-36-sashal@kernel.org> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20200223022235.1404-1-sashal@kernel.org> References: <20200223022235.1404-1-sashal@kernel.org> MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Arthur Kiyanovski [ Upstream commit 92569fd27f5cb0ccbdf7c7d70044b690e89a0277 ] The indirection table has the indices of the Rx queues. When we store it during set indirection operation, we convert the indices to our internal representation of the indices. Our internal representation of the indices is: even indices for Tx and uneven indices for Rx, where every Tx/Rx pair are in a consecutive order starting from 0. For example if the driver has 3 queues (3 for Tx and 3 for Rx) then the indices are as follows: 0 1 2 3 4 5 Tx Rx Tx Rx Tx Rx The BUG: The issue is that when we satisfy a get request for the indirection table, we don't convert the indices back to the original representation. The FIX: Simply apply the inverse function for the indices of the indirection table after we set it. Fixes: 1738cd3ed342 ("net: ena: Add a driver for Amazon Elastic Network Adapters (ENA)") Signed-off-by: Sameeh Jubran Signed-off-by: Arthur Kiyanovski Signed-off-by: David S. Miller Signed-off-by: Sasha Levin --- drivers/net/ethernet/amazon/ena/ena_ethtool.c | 24 ++++++++++++++++++- drivers/net/ethernet/amazon/ena/ena_netdev.h | 2 ++ 2 files changed, 25 insertions(+), 1 deletion(-) diff --git a/drivers/net/ethernet/amazon/ena/ena_ethtool.c b/drivers/net/ethernet/amazon/ena/ena_ethtool.c index 52a3decff34a4..446873bed382b 100644 --- a/drivers/net/ethernet/amazon/ena/ena_ethtool.c +++ b/drivers/net/ethernet/amazon/ena/ena_ethtool.c @@ -636,6 +636,28 @@ static u32 ena_get_rxfh_key_size(struct net_device *netdev) return ENA_HASH_KEY_SIZE; } +static int ena_indirection_table_get(struct ena_adapter *adapter, u32 *indir) +{ + struct ena_com_dev *ena_dev = adapter->ena_dev; + int i, rc; + + if (!indir) + return 0; + + rc = ena_com_indirect_table_get(ena_dev, indir); + if (rc) + return rc; + + /* Our internal representation of the indices is: even indices + * for Tx and uneven indices for Rx. We need to convert the Rx + * indices to be consecutive + */ + for (i = 0; i < ENA_RX_RSS_TABLE_SIZE; i++) + indir[i] = ENA_IO_RXQ_IDX_TO_COMBINED_IDX(indir[i]); + + return rc; +} + static int ena_get_rxfh(struct net_device *netdev, u32 *indir, u8 *key, u8 *hfunc) { @@ -644,7 +666,7 @@ static int ena_get_rxfh(struct net_device *netdev, u32 *indir, u8 *key, u8 func; int rc; - rc = ena_com_indirect_table_get(adapter->ena_dev, indir); + rc = ena_indirection_table_get(adapter, indir); if (rc) return rc; diff --git a/drivers/net/ethernet/amazon/ena/ena_netdev.h b/drivers/net/ethernet/amazon/ena/ena_netdev.h index 72ee51a82ec71..dc02950a96b8d 100644 --- a/drivers/net/ethernet/amazon/ena/ena_netdev.h +++ b/drivers/net/ethernet/amazon/ena/ena_netdev.h @@ -127,6 +127,8 @@ #define ENA_IO_TXQ_IDX(q) (2 * (q)) #define ENA_IO_RXQ_IDX(q) (2 * (q) + 1) +#define ENA_IO_TXQ_IDX_TO_COMBINED_IDX(q) ((q) / 2) +#define ENA_IO_RXQ_IDX_TO_COMBINED_IDX(q) (((q) - 1) / 2) #define ENA_MGMNT_IRQ_IDX 0 #define ENA_IO_IRQ_FIRST_IDX 1 -- 2.20.1