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 20FFCC001E0 for ; Tue, 25 Jul 2023 11:05:04 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233837AbjGYLFC (ORCPT ); Tue, 25 Jul 2023 07:05:02 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:41122 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233947AbjGYLEo (ORCPT ); Tue, 25 Jul 2023 07:04:44 -0400 Received: from dfw.source.kernel.org (dfw.source.kernel.org [139.178.84.217]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id E8A9F5245 for ; Tue, 25 Jul 2023 04:01:58 -0700 (PDT) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits)) (No client certificate requested) by dfw.source.kernel.org (Postfix) with ESMTPS id C9F7D6166E for ; Tue, 25 Jul 2023 11:01:58 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id D8E14C433C8; Tue, 25 Jul 2023 11:01:57 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1690282918; bh=xbH6wIwOZG5M2DaP0ZJgalD+ZaD9fshGC5PX0Sdww5I=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=qv1boYMEkcTDNfxanDqfW6N4DELGQGqBcT2Lm5Q+yD1FqmY8E2Msfpw514aoMDFA5 +W5Yx4knTrFdcCUE3C0RzQ7MCyM7zqZ8c/nYEMrKMZQIhEygL5hf2tegyBTe8AMEmq oOnf11UsBIydw+3LcysqNGxRALlUqqF5eqvTxIEM= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Jisheng Zhang , Simon Horman , Gabriel Somlo , Jakub Kicinski , Sasha Levin Subject: [PATCH 6.1 074/183] net: ethernet: litex: add support for 64 bit stats Date: Tue, 25 Jul 2023 12:45:02 +0200 Message-ID: <20230725104510.625912808@linuxfoundation.org> X-Mailer: git-send-email 2.41.0 In-Reply-To: <20230725104507.756981058@linuxfoundation.org> References: <20230725104507.756981058@linuxfoundation.org> User-Agent: quilt/0.67 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Jisheng Zhang [ Upstream commit 18da174d865a87d47d2f33f5b0a322efcf067728 ] Implement 64 bit per cpu stats to fix the overflow of netdev->stats on 32 bit platforms. To simplify the code, we use net core pcpu_sw_netstats infrastructure. One small drawback is some memory overhead because litex uses just one queue, but we allocate the counters per cpu. Signed-off-by: Jisheng Zhang Reviewed-by: Simon Horman Acked-by: Gabriel Somlo Link: https://lore.kernel.org/r/20230614162035.300-1-jszhang@kernel.org Signed-off-by: Jakub Kicinski Signed-off-by: Sasha Levin --- drivers/net/ethernet/litex/litex_liteeth.c | 19 +++++++++++++++---- 1 file changed, 15 insertions(+), 4 deletions(-) diff --git a/drivers/net/ethernet/litex/litex_liteeth.c b/drivers/net/ethernet/litex/litex_liteeth.c index 35f24e0f09349..ffa96059079c6 100644 --- a/drivers/net/ethernet/litex/litex_liteeth.c +++ b/drivers/net/ethernet/litex/litex_liteeth.c @@ -78,8 +78,7 @@ static int liteeth_rx(struct net_device *netdev) memcpy_fromio(data, priv->rx_base + rx_slot * priv->slot_size, len); skb->protocol = eth_type_trans(skb, netdev); - netdev->stats.rx_packets++; - netdev->stats.rx_bytes += len; + dev_sw_netstats_rx_add(netdev, len); return netif_rx(skb); @@ -185,8 +184,7 @@ static netdev_tx_t liteeth_start_xmit(struct sk_buff *skb, litex_write16(priv->base + LITEETH_READER_LENGTH, skb->len); litex_write8(priv->base + LITEETH_READER_START, 1); - netdev->stats.tx_bytes += skb->len; - netdev->stats.tx_packets++; + dev_sw_netstats_tx_add(netdev, 1, skb->len); priv->tx_slot = (priv->tx_slot + 1) % priv->num_tx_slots; dev_kfree_skb_any(skb); @@ -194,9 +192,17 @@ static netdev_tx_t liteeth_start_xmit(struct sk_buff *skb, return NETDEV_TX_OK; } +static void +liteeth_get_stats64(struct net_device *netdev, struct rtnl_link_stats64 *stats) +{ + netdev_stats_to_stats64(stats, &netdev->stats); + dev_fetch_sw_netstats(stats, netdev->tstats); +} + static const struct net_device_ops liteeth_netdev_ops = { .ndo_open = liteeth_open, .ndo_stop = liteeth_stop, + .ndo_get_stats64 = liteeth_get_stats64, .ndo_start_xmit = liteeth_start_xmit, }; @@ -242,6 +248,11 @@ static int liteeth_probe(struct platform_device *pdev) priv->netdev = netdev; priv->dev = &pdev->dev; + netdev->tstats = devm_netdev_alloc_pcpu_stats(&pdev->dev, + struct pcpu_sw_netstats); + if (!netdev->tstats) + return -ENOMEM; + irq = platform_get_irq(pdev, 0); if (irq < 0) return irq; -- 2.39.2