From nobody Mon Oct 6 22:53:57 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 E7B682EE5E1; Wed, 16 Jul 2025 21:48:09 +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=1752702491; cv=none; b=Uvyfv3gBKpkF1E832LqDrKRcOQngfOsqF86ICYnNG3UzUPwMBhW06shZbK5po6kAYbkVPeHLalkM5tI6VdAy/88EPiOYAM5yx4ZGF5J9/lpnFLUuCPN9Xlz1BVDgNGVVRL/73kKIpiXNhyNw9fUFiFquvRL6IsrehE6UP5a523c= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1752702491; c=relaxed/simple; bh=SAJgnr2c/W3iP7UnTrhUBrGxrc+tf+RwhvDXUo70XJo=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=qMq5kx6tlmAk7kN75nnvf56IPVJb7jcIno5aVyZIBL+o1JsT1+A1N2Jcy5mtvxjXfuMT/3BMjKhS/7sipvDWiH0ZHhZumuGNd/bS08UPyw2eq4qlyYbIC8iaH9vs/9XZaOec3U2QlPTx1PQYXdbdxxO/MeiAkq/3yXgd344ejP0= 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=P+1hPgAU; 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="P+1hPgAU" Received: from [127.0.0.1] (localhost [127.0.0.1]) by localhost (Mailerdaemon) with ESMTPSA id 408C01027237F; Wed, 16 Jul 2025 23:48:06 +0200 (CEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=denx.de; s=mx-20241105; t=1752702487; h=from:subject:date:message-id:to:cc:mime-version: content-transfer-encoding:in-reply-to:references; bh=5z2OokmK948fYuttI+SplfwLOy7ae/HE5ckQP7dsFUw=; b=P+1hPgAUNVYaYEXvHiOkzzs6SLfy1xj8CCGjiHiUyXHskn+bwRiP2/vrp0kRrZcQ2h6T0E SkB03Fchpoceyt5hDAc3UBbtmtvjyf3zCaWUklfI2ioMf311Hf6PSyOROa4XI4M0Xr0rMf xz/DL3EBPidSWuUk2BE4JOxVX06DgsqmIHh1bawmAmMkt0QpGiJK9VbMjytiY1UaFGffZ9 5EnXA25BMuBC6f+zpluFiYSUL8AgSz0ufZXKiYl8XImVguJ+Ok8LsMOOQgo+Qp6/KO08RW JMLfEoiBD7xzdSYKa+kOf3F6yoMLxGvNmZh2k+7miPgNkq28PyPLWqQO5tIuqw== 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 v15 05/12] net: mtip: Add buffers management functions to the L2 switch driver Date: Wed, 16 Jul 2025 23:47:24 +0200 Message-Id: <20250716214731.3384273-6-lukma@denx.de> X-Mailer: git-send-email 2.39.5 In-Reply-To: <20250716214731.3384273-1-lukma@denx.de> References: <20250716214731.3384273-1-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: - 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 3a1ebd96a2f2..b7e9f73fe4fa 100644 --- a/drivers/net/ethernet/freescale/mtipsw/mtipl2sw.c +++ b/drivers/net/ethernet/freescale/mtipsw/mtipl2sw.c @@ -881,11 +881,96 @@ 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