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 B1DD6C43219 for ; Wed, 16 Nov 2022 20:54:08 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S238755AbiKPUyG (ORCPT ); Wed, 16 Nov 2022 15:54:06 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:35780 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S238611AbiKPUxp (ORCPT ); Wed, 16 Nov 2022 15:53:45 -0500 Received: from mail-ed1-x52d.google.com (mail-ed1-x52d.google.com [IPv6:2a00:1450:4864:20::52d]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id B506EDD5 for ; Wed, 16 Nov 2022 12:53:26 -0800 (PST) Received: by mail-ed1-x52d.google.com with SMTP id 21so28489548edv.3 for ; Wed, 16 Nov 2022 12:53:26 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=baylibre-com.20210112.gappssmtp.com; s=20210112; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=ajsZbX3+twaGsWlZnthQH+DJqMTcB864bD+ktj1XJi8=; b=cGyV6iSyzBue0i5l97tQs1F/+bVMjgHav1MAY5Sp3ebIBKAF7rtEZUC/JmhiwCz45R rRQmwP4+vYFx1HAHkCDFG483CrsfEqHCo+WCCTFlJMKBWpByz9CHRlXEaEQXB15nQPg4 dVsPlUsn/h1qq8jjY1MBSrqbPNamW8aseozcmaPGAq5PLnSUxm1OYs1RIplM/W+npToS w+3jyD1we20/rAh/289ilWSbioDeGmbslRMCVMzHBoPyp6ZqDInmObMZhFFeJfhVg5b/ iuEhPle4TOpHkI0KN4kdg09gqWy6Y6GZf3f7H+fUL6eCG+EP6tv6oKJnBQ1vawL2Zg8+ FgpA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=ajsZbX3+twaGsWlZnthQH+DJqMTcB864bD+ktj1XJi8=; b=QmeBkUpWPG9IDj6z55IXR/0QmX2LypruPCmR4jKeNfzJ6qjECG9I5iud23pST25qsa xjr6VZna+KbOz9LInGtobPYv5khjsDQmqx1M8XNGMVe3DTJ4RyaL0ZIKgTAHyJDrtq96 4BgUaFEyd1vTwf7V9OgQddvm1c++cYOqcdz7vt4ivxlf2qa9WNzVKun5TWBSaUM8llOu SzukYgJQnZQNafhyR94oDfU82u1VcF74WZZOChfE6pqE9VJkA7q3lBQwvubEp2PeejmE zYA1+v1RLsb7sbIBMuPRU25ZNirI4AIfB8CqawhVWRzVUzdAGlbeU82uH33DxW0iXfcZ ZulA== X-Gm-Message-State: ANoB5pkOfu5igb4gmyM8JN/sfqBTyq2+jQi0Kf4h5ow7QB5VzUEhO+MX PpVyXAp8nbqmf+yJJAUCT4woRA== X-Google-Smtp-Source: AA0mqf6Z3LMs4psPQJjOVF9nPXX0RertMMFOq9jkbzOnbJJVdAXVu48YNiJv8YDaS7aZAMMLs4tX4w== X-Received: by 2002:aa7:d6cb:0:b0:467:e2dd:b593 with SMTP id x11-20020aa7d6cb000000b00467e2ddb593mr12985138edr.378.1668632005445; Wed, 16 Nov 2022 12:53:25 -0800 (PST) Received: from blmsp.fritz.box ([2001:4090:a244:804b:353b:565:addf:3aa7]) by smtp.gmail.com with ESMTPSA id kv17-20020a17090778d100b007aece68483csm6782828ejc.193.2022.11.16.12.53.24 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 16 Nov 2022 12:53:24 -0800 (PST) From: Markus Schneider-Pargmann To: Chandrasekar Ramakrishnan , Marc Kleine-Budde , Wolfgang Grandegger Cc: linux-can@vger.kernel.org, netdev@vger.kernel.org, linux-kernel@vger.kernel.org, Markus Schneider-Pargmann Subject: [PATCH 02/15] can: m_can: Wakeup net queue once tx was issued Date: Wed, 16 Nov 2022 21:52:55 +0100 Message-Id: <20221116205308.2996556-3-msp@baylibre.com> X-Mailer: git-send-email 2.38.1 In-Reply-To: <20221116205308.2996556-1-msp@baylibre.com> References: <20221116205308.2996556-1-msp@baylibre.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-can@vger.kernel.org Currently the driver waits to wakeup the queue until the interrupt for the transmit event is received and acknowledged. If we want to use the hardware FIFO, this is too late. Instead release the queue as soon as the transmit was transferred into the hardware FIFO. We are then ready for the next transmit to be transferred. Signed-off-by: Markus Schneider-Pargmann --- drivers/net/can/m_can/m_can.c | 7 ++++--- 1 file changed, 4 insertions(+), 3 deletions(-) diff --git a/drivers/net/can/m_can/m_can.c b/drivers/net/can/m_can/m_can.c index 2c01e3f7b23f..4adf03111782 100644 --- a/drivers/net/can/m_can/m_can.c +++ b/drivers/net/can/m_can/m_can.c @@ -1097,10 +1097,9 @@ static irqreturn_t m_can_isr(int irq, void *dev_id) /* New TX FIFO Element arrived */ if (m_can_echo_tx_event(dev) != 0) goto out_fail; - - if (netif_queue_stopped(dev) && - !m_can_tx_fifo_full(cdev)) + if (!cdev->tx_skb && netif_queue_stopped(dev)) netif_wake_queue(dev); + } } @@ -1705,6 +1704,8 @@ static netdev_tx_t m_can_tx_handler(struct m_can_classdev *cdev) if (m_can_tx_fifo_full(cdev) || m_can_next_echo_skb_occupied(dev, putidx)) netif_stop_queue(dev); + else if (cdev->is_peripheral && !cdev->tx_skb && netif_queue_stopped(dev)) + netif_wake_queue(dev); } return NETDEV_TX_OK; -- 2.38.1