From nobody Sun Dec 14 06:20:54 2025 Received: from mout-p-201.mailbox.org (mout-p-201.mailbox.org [80.241.56.171]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 78D6F2BD01A; Wed, 13 Aug 2025 07:08:44 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=80.241.56.171 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1755068927; cv=none; b=oRv2T4wzUHdDHTUoc6tKp87xfdt1IeHe1KnAcjAmL5jQi7RJa5uTZUwpML9Ttc3OhmeAfLvYMbHraqBhcP3n0bIaYMxS69zBMLOFA3RmfdKK5ehIHMNYM7OdqGuDps2alApk9Y3WVLtb55SPRs7075i18K/4EkLeRX85y+kRuaQ= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1755068927; c=relaxed/simple; bh=O7gfNLbwamGq+Om3xB5DzzmVxEDU19VgbrKC8VgrQr8=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=iH+xhyOnwBvLPyua7U0+RHRy38fmqr1oWzaf4wEcBTtOvFKDROR1afHH1V5NUM0Od6QrMBvIhoJ01X5ZGYZRepD98a42D5YTERbtPx+Txx9NC+DQuqq4XdXx03kTGF6/7yN1t7+nCLj59cAJREWq8ml2S4feDoc3YgD7Rp7Vhi4= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=mailbox.org; spf=pass smtp.mailfrom=mailbox.org; dkim=pass (2048-bit key) header.d=mailbox.org header.i=@mailbox.org header.b=btU52gZy; dkim=pass (2048-bit key) header.d=mailbox.org header.i=@mailbox.org header.b=tMARR3sT; arc=none smtp.client-ip=80.241.56.171 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=mailbox.org Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=mailbox.org Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=mailbox.org header.i=@mailbox.org header.b="btU52gZy"; dkim=pass (2048-bit key) header.d=mailbox.org header.i=@mailbox.org header.b="tMARR3sT" Received: from smtp2.mailbox.org (smtp2.mailbox.org [10.196.197.2]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256) (No client certificate requested) by mout-p-201.mailbox.org (Postfix) with ESMTPS id 4c1zxJ5jV6z9sv2; Wed, 13 Aug 2025 09:08:36 +0200 (CEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=mailbox.org; s=mail20150812; t=1755068916; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=KgENvn7fnaZzVFIGebw3b7IEXv3rl4roaIGw/uPude0=; b=btU52gZy9PmZFwVYu1fL/NujQRUYB0ny9UqsbwYrCAYEsZYD/oRYYqAwiR3g4Rw3mmyhTm u3Ca4VCIFCeqO4LEXkOFESIcMGZjpub8JWhjMGho4gEP5Moo1DTrp7LbtXc5rZqhF4K5ke mWUU3vKfAP1mw4y9sZ4a3hzz0xXaS/S3vec5t+4q61XIF4XnGR8+8lAsIMSds/YmclnOd8 lk9AOG8JU3zxr0APtRztn/765vh/Vhay8S/XlcbB8yDcQwWo8Q3FiUHHEiA4W0R+K68JrC w6gCKbKTKcl7boNXa3q+UGLbdWOM3xIvG2n7A2C4kgFlxJAIv61vT+e+jhC0Zw== From: Lukasz Majewski DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=mailbox.org; s=mail20150812; t=1755068914; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=KgENvn7fnaZzVFIGebw3b7IEXv3rl4roaIGw/uPude0=; b=tMARR3sTe9burf5GVEb1DPkb8y9JxNZrFRXwJkxnmytnUtX5ZfNIx93uiQHHHp9Ew5ZWhW Ey1S732iE1yxDEUKD+x7ngyZ47nFG5k5WkszyyLb6DiC5UcBnti2ZF/fS8qdAEC+AMy+7k ldTvEtj+DYPZ4ZfDqAC9fY/B/HpdQQAgIwV+lyDLgWqxdVftI9AEN+Rm0auSZNax4dI3Zs oiBGHVEuexXNtlzbn2EBSVx/0T6iLnlSFYUDUqfpSw8xPS7VBWLL9ypRRofw6J+6u9MgPC RqAF4gBIDVHwFMBGA4XwPKYAAOGlPbRHTHzJsem8SdYIP/N0tYsN828ku8G7Sw== To: Andrew Lunn , davem@davemloft.net, Eric Dumazet , Jakub Kicinski , Paolo Abeni , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Shawn Guo Cc: Sascha Hauer , Pengutronix Kernel Team , Fabio Estevam , Richard Cochran , netdev@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, imx@lists.linux.dev, linux-arm-kernel@lists.infradead.org, Stefan Wahren , Simon Horman , Lukasz Majewski Subject: [net-next v18 3/7] net: mtip: Add buffers management functions to the L2 switch driver Date: Wed, 13 Aug 2025 09:07:51 +0200 Message-Id: <20250813070755.1523898-4-lukasz.majewski@mailbox.org> In-Reply-To: <20250813070755.1523898-1-lukasz.majewski@mailbox.org> References: <20250813070755.1523898-1-lukasz.majewski@mailbox.org> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-MBO-RS-ID: ec3be85afd1e95e4a84 X-MBO-RS-META: qkdgt8j91zg5pewozqptwdbz6qnkeqiz Content-Type: text/plain; charset="utf-8" This patch provides buffers management funcions' content for MTIP L2 switch. Signed-off-by: Lukasz Majewski --- Changes for v14: - New patch - created by excluding some code from large (i.e. v13 and earlier) MTIP driver Changes for v15 - v18: - None --- .../net/ethernet/freescale/mtipsw/mtipl2sw.c | 85 +++++++++++++++++++ 1 file changed, 85 insertions(+) diff --git a/drivers/net/ethernet/freescale/mtipsw/mtipl2sw.c b/drivers/net= /ethernet/freescale/mtipsw/mtipl2sw.c index 157df1efbf99..c80857310a17 100644 --- a/drivers/net/ethernet/freescale/mtipsw/mtipl2sw.c +++ b/drivers/net/ethernet/freescale/mtipsw/mtipl2sw.c @@ -870,11 +870,96 @@ static void mtip_get_drvinfo(struct net_device *dev, =20 static void mtip_free_buffers(struct net_device *dev) { + struct mtip_ndev_priv *priv =3D netdev_priv(dev); + struct switch_enet_private *fep =3D priv->fep; + int i; + + for (i =3D 0; i < RX_RING_SIZE; i++) { + page_pool_put_full_page(fep->page_pool, + fep->page[i], false); + fep->page[i] =3D NULL; + } + + page_pool_destroy(fep->page_pool); + fep->page_pool =3D NULL; + + for (i =3D 0; i < TX_RING_SIZE; i++) + kfree(fep->tx_bounce[i]); +} + +static int mtip_create_page_pool(struct switch_enet_private *fep, int size) +{ + struct page_pool_params pp_params =3D { + .order =3D 0, + .flags =3D PP_FLAG_DMA_MAP | PP_FLAG_DMA_SYNC_DEV, + .pool_size =3D size, + .nid =3D dev_to_node(&fep->pdev->dev), + .dev =3D &fep->pdev->dev, + .dma_dir =3D DMA_FROM_DEVICE, + .offset =3D 0, + .max_len =3D MTIP_SWITCH_RX_FRSIZE, + }; + int ret =3D 0; + + fep->page_pool =3D page_pool_create(&pp_params); + if (IS_ERR(fep->page_pool)) { + ret =3D PTR_ERR(fep->page_pool); + fep->page_pool =3D NULL; + } + + return ret; } =20 static int mtip_alloc_buffers(struct net_device *dev) { + struct mtip_ndev_priv *priv =3D netdev_priv(dev); + struct switch_enet_private *fep =3D priv->fep; + struct cbd_t *bdp; + struct page *page; + int i, ret; + + ret =3D mtip_create_page_pool(fep, RX_RING_SIZE); + if (ret < 0) { + dev_err(&fep->pdev->dev, "Failed to create page pool\n"); + return ret; + } + + bdp =3D fep->rx_bd_base; + for (i =3D 0; i < RX_RING_SIZE; i++) { + page =3D page_pool_dev_alloc_pages(fep->page_pool); + if (!page) { + dev_err(&fep->pdev->dev, + "Failed to allocate page for rx buffer\n"); + goto err; + } + + bdp->cbd_bufaddr =3D page_pool_get_dma_addr(page); + fep->page[i] =3D page; + + bdp->cbd_sc =3D BD_ENET_RX_EMPTY; + bdp++; + } + + mtip_set_last_buf_to_wrap(bdp); + + bdp =3D fep->tx_bd_base; + for (i =3D 0; i < TX_RING_SIZE; i++) { + fep->tx_bounce[i] =3D kmalloc(MTIP_SWITCH_TX_FRSIZE, GFP_KERNEL); + if (!fep->tx_bounce[i]) + goto err; + + bdp->cbd_sc =3D 0; + bdp->cbd_bufaddr =3D 0; + bdp++; + } + + mtip_set_last_buf_to_wrap(bdp); + return 0; + + err: + mtip_free_buffers(dev); + return -ENOMEM; } =20 static int mtip_rx_napi(struct napi_struct *napi, int budget) --=20 2.39.5