From patchwork Fri Nov 25 15:30:15 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Gregory CLEMENT X-Patchwork-Id: 699277 X-Patchwork-Delegate: davem@davemloft.net Return-Path: X-Original-To: patchwork-incoming@ozlabs.org Delivered-To: patchwork-incoming@ozlabs.org Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by ozlabs.org (Postfix) with ESMTP id 3tQKms1Vsvz9t2D for ; Sat, 26 Nov 2016 02:31:41 +1100 (AEDT) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755404AbcKYPbY (ORCPT ); Fri, 25 Nov 2016 10:31:24 -0500 Received: from mail.free-electrons.com ([62.4.15.54]:43994 "EHLO mail.free-electrons.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755383AbcKYPbQ (ORCPT ); Fri, 25 Nov 2016 10:31:16 -0500 Received: by mail.free-electrons.com (Postfix, from userid 110) id 9153020B4F; Fri, 25 Nov 2016 16:31:09 +0100 (CET) X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on mail.free-electrons.com X-Spam-Level: X-Spam-Status: No, score=-1.0 required=5.0 tests=ALL_TRUSTED,SHORTCIRCUIT, URIBL_BLOCKED shortcircuit=ham autolearn=disabled version=3.4.0 Received: from localhost (83.146.29.93.rev.sfr.net [93.29.146.83]) by mail.free-electrons.com (Postfix) with ESMTPSA id 7DF3820CA7; Fri, 25 Nov 2016 16:30:49 +0100 (CET) From: Gregory CLEMENT To: "David S. Miller" , linux-kernel@vger.kernel.org, netdev@vger.kernel.org Cc: Jisheng Zhang , Arnd Bergmann , Jason Cooper , Andrew Lunn , Sebastian Hesselbarth , Gregory CLEMENT , Thomas Petazzoni , linux-arm-kernel@lists.infradead.org, Nadav Haklai , Marcin Wojtas , Dmitri Epshtein , Yelena Krivosheev Subject: [PATCH net-next 2/5] net: mvneta: Convert to be 64 bits compatible Date: Fri, 25 Nov 2016 16:30:15 +0100 Message-Id: <3e905d912fa996410128f8956507bbb8264e70c6.1480087510.git-series.gregory.clement@free-electrons.com> X-Mailer: git-send-email 2.10.2 In-Reply-To: References: In-Reply-To: References: Sender: netdev-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org From: Marcin Wojtas Prepare the mvneta driver in order to be usable on the 64 bits platform such as the Armada 3700. [gregory.clement@free-electrons.com]: this patch was extract from a larger one to ease review and maintenance. Signed-off-by: Marcin Wojtas Signed-off-by: Gregory CLEMENT --- drivers/net/ethernet/marvell/mvneta.c | 17 ++++++++++++++++- 1 file changed, 16 insertions(+), 1 deletion(-) diff --git a/drivers/net/ethernet/marvell/mvneta.c b/drivers/net/ethernet/marvell/mvneta.c index b6849f88cab7..ad3872e07a93 100644 --- a/drivers/net/ethernet/marvell/mvneta.c +++ b/drivers/net/ethernet/marvell/mvneta.c @@ -296,6 +296,12 @@ /* descriptor aligned size */ #define MVNETA_DESC_ALIGNED_SIZE 32 +/* Number of bytes to be taken into account by HW when putting incoming data + * to the buffers. It is needed in case NET_SKB_PAD exceeds maximum packet + * offset supported in MVNETA_RXQ_CONFIG_REG(q) registers. + */ +#define MVNETA_RX_PKT_OFFSET_CORRECTION 64 + #define MVNETA_RX_PKT_SIZE(mtu) \ ALIGN((mtu) + MVNETA_MH_SIZE + MVNETA_VLAN_TAG_LEN + \ ETH_HLEN + ETH_FCS_LEN, \ @@ -416,6 +422,7 @@ struct mvneta_port { u64 ethtool_stats[ARRAY_SIZE(mvneta_statistics)]; u32 indir[MVNETA_RSS_LU_TABLE_SIZE]; + u16 rx_offset_correction; }; /* The mvneta_tx_desc and mvneta_rx_desc structures describe the @@ -1807,6 +1814,7 @@ static int mvneta_rx_refill(struct mvneta_port *pp, return -ENOMEM; } + phys_addr += pp->rx_offset_correction; mvneta_rx_desc_fill(rx_desc, phys_addr, data, rxq); return 0; } @@ -2838,7 +2846,7 @@ static int mvneta_rxq_init(struct mvneta_port *pp, mvreg_write(pp, MVNETA_RXQ_SIZE_REG(rxq->id), rxq->size); /* Set Offset */ - mvneta_rxq_offset_set(pp, rxq, NET_SKB_PAD); + mvneta_rxq_offset_set(pp, rxq, NET_SKB_PAD - pp->rx_offset_correction); /* Set coalescing pkts and time */ mvneta_rx_pkts_coal_set(pp, rxq, rxq->pkts_coal); @@ -4091,6 +4099,13 @@ static int mvneta_probe(struct platform_device *pdev) pp->rxq_def = rxq_def; + /* Set RX packet offset correction for platforms, whose + * NET_SKB_PAD, exceeds 64B. It should be 64B for 64-bit + * platforms and 0B for 32-bit ones. + */ + pp->rx_offset_correction = + max(0, NET_SKB_PAD - MVNETA_RX_PKT_OFFSET_CORRECTION); + pp->indir[0] = rxq_def; pp->clk = devm_clk_get(&pdev->dev, "core");