From patchwork Fri Oct 11 18:48:20 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Matthias Brugger X-Patchwork-Id: 1175513 X-Patchwork-Delegate: davem@davemloft.net Return-Path: X-Original-To: patchwork-incoming-netdev@ozlabs.org Delivered-To: patchwork-incoming-netdev@ozlabs.org Authentication-Results: ozlabs.org; spf=none (mailfrom) smtp.mailfrom=vger.kernel.org (client-ip=209.132.180.67; helo=vger.kernel.org; envelope-from=netdev-owner@vger.kernel.org; receiver=) Authentication-Results: ozlabs.org; dmarc=pass (p=none dis=none) header.from=kernel.org Authentication-Results: ozlabs.org; dkim=pass (1024-bit key; unprotected) header.d=kernel.org header.i=@kernel.org header.b="g05iTO8b"; dkim-atps=neutral Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by ozlabs.org (Postfix) with ESMTP id 46qcRY18Blz9sNx for ; Sat, 12 Oct 2019 05:48:41 +1100 (AEDT) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728923AbfJKSsg (ORCPT ); Fri, 11 Oct 2019 14:48:36 -0400 Received: from mail.kernel.org ([198.145.29.99]:47498 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728878AbfJKSsf (ORCPT ); Fri, 11 Oct 2019 14:48:35 -0400 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" Cc: Nicolas Saenz Julienne , Matthias Brugger , linux-rpi-kernel@lists.infradead.org, linux-arm-kernel@lists.infradead.org, Stefan Wahren , Matthias Brugger , Doug Berger , bcm-kernel-feedback-list@broadcom.com, linux-kernel@vger.kernel.org, netdev@vger.kernel.org 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 Sender: netdev-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.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;