From nobody Mon Oct 6 06:42:59 2025 Received: from mx.denx.de (mx.denx.de [89.58.32.78]) (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 11A3F246790; Thu, 24 Jul 2025 22:33:59 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=89.58.32.78 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1753396441; cv=none; b=O4MAimo0p3efG+pfIN+sq4ISV/GDzgaaJxZrkdlPmqZeoexUaa7bA6GXrU4AsWxl7l8/hDBZrABDSCEcDUMISiG/z0EO6i7JhOrh1FxCza+Xf7XmKow014d+gcrn6+XW3/K705yBiunPp0wnOjUHv1KEX9Utx6tRCMGP1Or+VCM= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1753396441; c=relaxed/simple; bh=cEAXnyHyU5m3CRnZvH3sSpLvnNpddGJiK1QZxdMvYfc=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=iG9wXfkQUOFgLUHH/xKPH+AD8VJHPnet6EvdPzEDNpvK7y9NktqpZdEnsrobAw6ozua9F3egBg0lesv7cMB6fdtw2ByhtDLSEUqZHjafqwZghFUgZluxi72q8Ms/cfc71WsDO4CExVXZ4HB9+eCX9WHrgNILOGWcyKauh1a2Xew= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=denx.de; spf=pass smtp.mailfrom=denx.de; dkim=pass (2048-bit key) header.d=denx.de header.i=@denx.de header.b=VBQeiAWG; arc=none smtp.client-ip=89.58.32.78 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=denx.de Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=denx.de Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=denx.de header.i=@denx.de header.b="VBQeiAWG" Received: from [127.0.0.1] (localhost [127.0.0.1]) by localhost (Mailerdaemon) with ESMTPSA id DD94510391E87; Fri, 25 Jul 2025 00:33:55 +0200 (CEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=denx.de; s=mx-20241105; t=1753396437; h=from:subject:date:message-id:to:cc:mime-version: content-transfer-encoding:in-reply-to:references; bh=hM+v370wtickq5V8CQzPOHaBm83ZWdcg4XkbnFyIoGI=; b=VBQeiAWGFaEgDpAEadMAlG/AGpg4LOTVWxtyeX5ETxFrAkcyuF0J+0MQY/nL78s/ZXC2/d R7yYFhbM4hIN4hWjF0bgmeI6egxTChBipr/Z3iD4AF/3dpkHparIVz7nVBq6gV7Zey0oN/ 2aKLKvix+3ZIfKRXAMxKDj4r+k4FUi5GavcO8ZTrG+cb1Rv0y5pz/bk2CkHSga2hTer+k4 p3e6i7Eh/kbQ0WsH3Rpzjztjbi626EUXzVAQa57DLrEv45rJzGXimaXpv2vKdxULrVhsrk 04Hpfx7tb7s5I/abaM9pn870hdIiGinfl9Bepzsdp93OgOnMD6tAfy26i9Em6A== From: Lukasz Majewski 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 v16 05/12] net: mtip: Add buffers management functions to the L2 switch driver Date: Fri, 25 Jul 2025 00:33:11 +0200 Message-Id: <20250724223318.3068984-6-lukma@denx.de> X-Mailer: git-send-email 2.39.5 In-Reply-To: <20250724223318.3068984-1-lukma@denx.de> References: <20250724223318.3068984-1-lukma@denx.de> 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-Last-TLS-Session-Version: TLSv1.3 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 - v16: - 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 3a37d7308712..a4668047ed11 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