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Sat, 19 Aug 2023 13:52:17 +0000 (UTC) DKIM-Filter: OpenDKIM Filter v2.11.0 smtp1.osuosl.org EF1A783BA1 X-IronPort-AV: E=McAfee;i="6600,9927,10807"; a="363463630" X-IronPort-AV: E=Sophos;i="6.01,186,1684825200"; d="scan'208";a="363463630" Received: from fmsmga004.fm.intel.com ([10.253.24.48]) by orsmga101.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 19 Aug 2023 06:52:17 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=McAfee;i="6600,9927,10807"; a="805452183" X-IronPort-AV: E=Sophos;i="6.01,186,1684825200"; d="scan'208";a="805452183" Received: from zulkifl3-ilbpg0.png.intel.com ([10.88.229.82]) by fmsmga004.fm.intel.com with ESMTP; 19 Aug 2023 06:52:14 -0700 From: Muhammad Husaini Zulkifli To: intel-wired-lan@osuosl.org Date: Sat, 19 Aug 2023 21:50:51 +0800 Message-Id: <20230819135051.29390-3-muhammad.husaini.zulkifli@intel.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20230819135051.29390-1-muhammad.husaini.zulkifli@intel.com> References: <20230819135051.29390-1-muhammad.husaini.zulkifli@intel.com> X-Mailman-Original-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1692453137; x=1723989137; h=from:to:cc:subject:date:message-id:in-reply-to: references; bh=yde9xJhaTEZD+38PelDCp44E5kb3nUKVR/tKJEve7W0=; b=REbgHN2imQoz3cIgPRsqxwl89OxqXDF35lHp3XjmxzaqbLvbMxhlQJcq HnYUhA1W2jrq0A90w5g4OMkfNO6678y1ERgkJJ2gre/oGxk71MwyM3vZE AGECRUqKujONV2QJqzTRe62DKITdLJTvISrQUnRVkDBZnLISXlvOtd8z1 0DpMZy+P4CEbdWJXWLwwgH+MUbioQsafWxES/9wBY80s+kPotTcoETzWC aXcCLH297EGZsOod6ITUjKmLfZCfabhVtwrl7+TSQ/QcbG1zl+mbwdU2V QfTwiFT2uR11iCa3pk5NY297EPqhS7LEhSOuzKC0pdlu7GacqM3W4F8is A==; X-Mailman-Original-Authentication-Results: smtp1.osuosl.org; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.a=rsa-sha256 header.s=Intel header.b=REbgHN2i Subject: [Intel-wired-lan] [PATCH iwl-net v4 2/2] igc: Modify the tx-usecs coalesce setting X-BeenThere: intel-wired-lan@osuosl.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Intel Wired Ethernet Linux Kernel Driver Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: bcreeley@amd.com, netdev@vger.kernel.org, edumazet@google.com, pabeni@redhat.com, anthony.l.nguyen@intel.com, horms@kernel.org, kuba@kernel.org, davem@davemloft.net MIME-Version: 1.0 Errors-To: intel-wired-lan-bounces@osuosl.org Sender: "Intel-wired-lan" This patch enables users to modify the tx-usecs parameter. The rx-usecs value will adhere to the same value as tx-usecs if the queue pair setting is enabled. How to test: User can set the coalesce value using ethtool command. Example command: Set: ethtool -C Previous output: root@P12DYHUSAINI:~# ethtool -C enp170s0 tx-usecs 10 netlink error: Invalid argument New output: root@P12DYHUSAINI:~# ethtool -C enp170s0 tx-usecs 10 rx-usecs: 10 rx-frames: n/a rx-usecs-irq: n/a rx-frames-irq: n/a tx-usecs: 10 tx-frames: n/a tx-usecs-irq: n/a tx-frames-irq: n/a Fixes: 8c5ad0dae93c ("igc: Add ethtool support") Signed-off-by: Muhammad Husaini Zulkifli Tested-by: Naama Meir --- drivers/net/ethernet/intel/igc/igc_ethtool.c | 45 ++++++++++++++------ 1 file changed, 33 insertions(+), 12 deletions(-) diff --git a/drivers/net/ethernet/intel/igc/igc_ethtool.c b/drivers/net/ethernet/intel/igc/igc_ethtool.c index 62d925b26f2c..40ec6ebc0843 100644 --- a/drivers/net/ethernet/intel/igc/igc_ethtool.c +++ b/drivers/net/ethernet/intel/igc/igc_ethtool.c @@ -888,6 +888,11 @@ static int igc_ethtool_get_coalesce(struct net_device *netdev, return 0; } +static int igc_ethtool_coalesce_to_itr_setting(u32 coalesce_usecs) +{ + return coalesce_usecs <= 3 ? coalesce_usecs : coalesce_usecs << 2; +} + static int igc_ethtool_set_coalesce(struct net_device *netdev, struct ethtool_coalesce *ec, struct kernel_ethtool_coalesce *kernel_coal, @@ -914,19 +919,35 @@ static int igc_ethtool_set_coalesce(struct net_device *netdev, adapter->flags &= ~IGC_FLAG_DMAC; } - /* convert to rate of irq's per second */ - if (ec->rx_coalesce_usecs && ec->rx_coalesce_usecs <= 3) - adapter->rx_itr_setting = ec->rx_coalesce_usecs; - else - adapter->rx_itr_setting = ec->rx_coalesce_usecs << 2; + if (adapter->flags & IGC_FLAG_QUEUE_PAIRS) { + u32 old_tx_itr, old_rx_itr; + + /* This is to get back the original value before byte shifting */ + old_tx_itr = (adapter->tx_itr_setting <= 3) ? + adapter->tx_itr_setting : adapter->tx_itr_setting >> 2; + + old_rx_itr = (adapter->rx_itr_setting <= 3) ? + adapter->rx_itr_setting : adapter->rx_itr_setting >> 2; + + /* convert to rate of irq's per second */ + if (old_tx_itr != ec->tx_coalesce_usecs) { + adapter->tx_itr_setting = + igc_ethtool_coalesce_to_itr_setting(ec->tx_coalesce_usecs); + adapter->rx_itr_setting = adapter->tx_itr_setting; + } else if (old_rx_itr != ec->rx_coalesce_usecs) { + adapter->rx_itr_setting = + igc_ethtool_coalesce_to_itr_setting(ec->rx_coalesce_usecs); + adapter->tx_itr_setting = adapter->rx_itr_setting; + } + } else { + /* convert to rate of irq's per second */ + adapter->rx_itr_setting = + igc_ethtool_coalesce_to_itr_setting(ec->rx_coalesce_usecs); - /* convert to rate of irq's per second */ - if (adapter->flags & IGC_FLAG_QUEUE_PAIRS) - adapter->tx_itr_setting = adapter->rx_itr_setting; - else if (ec->tx_coalesce_usecs && ec->tx_coalesce_usecs <= 3) - adapter->tx_itr_setting = ec->tx_coalesce_usecs; - else - adapter->tx_itr_setting = ec->tx_coalesce_usecs << 2; + /* convert to rate of irq's per second */ + adapter->tx_itr_setting = + igc_ethtool_coalesce_to_itr_setting(ec->tx_coalesce_usecs); + } for (i = 0; i < adapter->num_q_vectors; i++) { struct igc_q_vector *q_vector = adapter->q_vector[i];