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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 36112C43219 for ; Sat, 8 Jan 2022 21:44:26 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233152AbiAHVoZ (ORCPT ); Sat, 8 Jan 2022 16:44:25 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:33684 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233169AbiAHVoS (ORCPT ); Sat, 8 Jan 2022 16:44:18 -0500 Received: from metis.ext.pengutronix.de (metis.ext.pengutronix.de [IPv6:2001:67c:670:201:290:27ff:fe1d:cc33]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id D5BE0C061763 for ; Sat, 8 Jan 2022 13:44:10 -0800 (PST) Received: from gallifrey.ext.pengutronix.de ([2001:67c:670:201:5054:ff:fe8d:eefb] helo=bjornoya.blackshift.org) by metis.ext.pengutronix.de with esmtps (TLS1.3:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1n6JVR-0004ep-1F for linux-can@vger.kernel.org; Sat, 08 Jan 2022 22:44:09 +0100 Received: from dspam.blackshift.org (localhost [127.0.0.1]) by bjornoya.blackshift.org (Postfix) with SMTP id CFC6E6D3AA4 for ; Sat, 8 Jan 2022 21:43:54 +0000 (UTC) Received: from hardanger.blackshift.org (unknown [172.20.34.65]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256) (Client did not present a certificate) by bjornoya.blackshift.org (Postfix) with ESMTPS id 6E2DF6D3A33; Sat, 8 Jan 2022 21:43:49 +0000 (UTC) Received: from blackshift.org (localhost [::1]) by hardanger.blackshift.org (OpenSMTPD) with ESMTP id c0141510; Sat, 8 Jan 2022 21:43:46 +0000 (UTC) From: Marc Kleine-Budde To: netdev@vger.kernel.org Cc: davem@davemloft.net, kuba@kernel.org, linux-can@vger.kernel.org, kernel@pengutronix.de, Dario Binacchi , Marc Kleine-Budde Subject: [PATCH net-next 20/22] can: flexcan: add ethtool support to get rx/tx ring parameters Date: Sat, 8 Jan 2022 22:43:43 +0100 Message-Id: <20220108214345.1848470-21-mkl@pengutronix.de> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20220108214345.1848470-1-mkl@pengutronix.de> References: <20220108214345.1848470-1-mkl@pengutronix.de> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-SA-Exim-Connect-IP: 2001:67c:670:201:5054:ff:fe8d:eefb X-SA-Exim-Mail-From: mkl@pengutronix.de X-SA-Exim-Scanned: No (on metis.ext.pengutronix.de); SAEximRunCond expanded to false X-PTX-Original-Recipient: linux-can@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-can@vger.kernel.org From: Dario Binacchi This patch adds ethtool support to get the number of message buffers configured for reception/transmission, which may also depends on runtime configurations such as the 'rx-rtr' flag state. Link: https://lore.kernel.org/all/20220108181633.420433-1-dario.binacchi@amarulasolutions.com Signed-off-by: Dario Binacchi [mkl: port to net-next/master, replace __sw_hweight64 by simpler calculation] Signed-off-by: Marc Kleine-Budde --- drivers/net/can/flexcan/flexcan-ethtool.c | 21 +++++++++++++++++++++ 1 file changed, 21 insertions(+) diff --git a/drivers/net/can/flexcan/flexcan-ethtool.c b/drivers/net/can/flexcan/flexcan-ethtool.c index d01347fbfaa9..3ae535577700 100644 --- a/drivers/net/can/flexcan/flexcan-ethtool.c +++ b/drivers/net/can/flexcan/flexcan-ethtool.c @@ -17,6 +17,26 @@ static const char flexcan_priv_flags_strings[][ETH_GSTRING_LEN] = { "rx-rtr", }; +static void +flexcan_get_ringparam(struct net_device *ndev, struct ethtool_ringparam *ring, + struct kernel_ethtool_ringparam *kernel_ring, + struct netlink_ext_ack *ext_ack) +{ + const struct flexcan_priv *priv = netdev_priv(ndev); + + ring->rx_max_pending = priv->mb_count; + ring->tx_max_pending = priv->mb_count; + + if (priv->devtype_data.quirks & FLEXCAN_QUIRK_USE_RX_MAILBOX) + ring->rx_pending = priv->offload.mb_last - + priv->offload.mb_first + 1; + else + ring->rx_pending = 6; /* RX-FIFO depth is fixed */ + + /* the drive currently supports only on TX buffer */ + ring->tx_pending = 1; +} + static void flexcan_get_strings(struct net_device *ndev, u32 stringset, u8 *data) { @@ -81,6 +101,7 @@ static int flexcan_get_sset_count(struct net_device *netdev, int sset) } static const struct ethtool_ops flexcan_ethtool_ops = { + .get_ringparam = flexcan_get_ringparam, .get_strings = flexcan_get_strings, .get_priv_flags = flexcan_get_priv_flags, .set_priv_flags = flexcan_set_priv_flags, -- 2.34.1