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=-10.0 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE, SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=unavailable 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 D7E6FECE58D for ; Fri, 11 Oct 2019 18:49:03 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id ABBA221835 for ; Fri, 11 Oct 2019 18:49:03 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="nMMDsmfV"; dkim=fail reason="signature verification failed" (1024-bit key) header.d=kernel.org header.i=@kernel.org header.b="g05iTO8b" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org ABBA221835 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=kernel.org Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20170209; h=Sender: Content-Transfer-Encoding:Content-Type:Cc:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Message-Id:Date:Subject:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=uyKajnSNE8nLPsZUPa4moj8nsv3pZk0AwXxepvfBJJI=; b=nMMDsmfVInQ3yZ 8xRnRAad92hVdX+Ks0xpbe58V0CD4b6jCd98fbrf4swfFYXkbCGRyv/daBlG2HXYW/50Sw/pHMh9a lKQUv+HH3sajzcsIAv6CJQFEV+BC78bgMJGuoF93U5hP5QrU34TQgyFE4TfakTZdxHXINGde8Srxy LOZtS0JkxvO6B8V7PcGbu/F6JHR9WYkEOLc7SFuhe5faY38yR07oEiTcL4+WlVjTKNyuGL2acKa8Y NhEq5u3wKmAOj0vLSmCruCsalA/8l7rVBo1dBNiq/UzN0nFG4G84AKP5BSpLwbRoNL07JmdapSjYy tcr4HDGqvHz1PpGUGQhw==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1iIzyI-0002Ch-6j; Fri, 11 Oct 2019 18:49:02 +0000 Received: from mail.kernel.org ([198.145.29.99]) by bombadil.infradead.org with esmtps (Exim 4.92.3 #3 (Red Hat Linux)) id 1iIzxr-0001pO-M3; Fri, 11 Oct 2019 18:48:37 +0000 Received: from ziggy.de (unknown [37.223.145.112]) (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 0677D21D7D; Fri, 11 Oct 2019 18:48:32 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1570819715; bh=OTgrNLS53g8Rccfn5K0Ut7tIZlmbMatndfizupjVyyk=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=g05iTO8bqc9Hw/bPhfJPhqHd2S/Wm/rU7uVAmBZFK7XabPCoP46nZvxGqaQ78Pc+y 5WEMsFah3lJ+B40CYJYv56CgIRYNrrV/6OgUyGj2854IFl/WPJo9l4AfdwbaqluUH6 6cdx7SJ3NZcTCZpowHc531St/uRnbnjTZeogUH5M= From: matthias.bgg@kernel.org To: Florian Fainelli , "David S . Miller" Subject: [PATCH v1 2/3] net: bcmgenet: use optional max DMA burst size property Date: Fri, 11 Oct 2019 20:48:20 +0200 Message-Id: <20191011184822.866-3-matthias.bgg@kernel.org> X-Mailer: git-send-email 2.23.0 In-Reply-To: <20191011184822.866-1-matthias.bgg@kernel.org> References: <20191011184822.866-1-matthias.bgg@kernel.org> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20191011_114835_800602_334A28DB X-CRM114-Status: GOOD ( 13.26 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Matthias Brugger , netdev@vger.kernel.org, linux-kernel@vger.kernel.org, Nicolas Saenz Julienne , Doug Berger , bcm-kernel-feedback-list@broadcom.com, Stefan Wahren , Matthias Brugger , linux-arm-kernel@lists.infradead.org, linux-rpi-kernel@lists.infradead.org Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org From: Matthias Brugger Depending on the HW, the maximal usable DMA burst size can vary. If not set accordingly a timeout in the transmit queue happens and no package can be sent. Read to optional max-burst-sz property, if not present, fallback to the standard value. Signed-off-by: Matthias Brugger --- drivers/net/ethernet/broadcom/genet/bcmgenet.c | 13 +++++++++++-- drivers/net/ethernet/broadcom/genet/bcmgenet.h | 1 + 2 files changed, 12 insertions(+), 2 deletions(-) diff --git a/drivers/net/ethernet/broadcom/genet/bcmgenet.c b/drivers/net/ethernet/broadcom/genet/bcmgenet.c index 12cb77ef1081..a7bb822a6d83 100644 --- a/drivers/net/ethernet/broadcom/genet/bcmgenet.c +++ b/drivers/net/ethernet/broadcom/genet/bcmgenet.c @@ -2576,7 +2576,8 @@ static int bcmgenet_init_dma(struct bcmgenet_priv *priv) } /* Init rDma */ - bcmgenet_rdma_writel(priv, DMA_MAX_BURST_LENGTH, DMA_SCB_BURST_SIZE); + bcmgenet_rdma_writel(priv, priv->dma_max_burst_length, + DMA_SCB_BURST_SIZE); /* Initialize Rx queues */ ret = bcmgenet_init_rx_queues(priv->dev); @@ -2589,7 +2590,8 @@ static int bcmgenet_init_dma(struct bcmgenet_priv *priv) } /* Init tDma */ - bcmgenet_tdma_writel(priv, DMA_MAX_BURST_LENGTH, DMA_SCB_BURST_SIZE); + bcmgenet_tdma_writel(priv, priv->dma_max_burst_length, + DMA_SCB_BURST_SIZE); /* Initialize Tx queues */ bcmgenet_init_tx_queues(priv->dev); @@ -3522,6 +3524,13 @@ static int bcmgenet_probe(struct platform_device *pdev) clk_prepare_enable(priv->clk); + if (dn) { + of_property_read_u32(dn, "dma-burst-sz", + &priv->dma_max_burst_length); + } else { + priv->dma_max_burst_length = DMA_MAX_BURST_LENGTH; + } + bcmgenet_set_hw_params(priv); /* Mii wait queue */ diff --git a/drivers/net/ethernet/broadcom/genet/bcmgenet.h b/drivers/net/ethernet/broadcom/genet/bcmgenet.h index 4a8fc03d82fd..897f356eb376 100644 --- a/drivers/net/ethernet/broadcom/genet/bcmgenet.h +++ b/drivers/net/ethernet/broadcom/genet/bcmgenet.h @@ -663,6 +663,7 @@ struct bcmgenet_priv { bool crc_fwd_en; unsigned int dma_rx_chk_bit; + unsigned int dma_max_burst_length; u32 msg_enable; -- 2.23.0 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel