From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mout-p-103.mailbox.org (mout-p-103.mailbox.org [80.241.56.161]) (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 75A3D2586C5 for ; Sun, 24 Aug 2025 22:08:26 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=80.241.56.161 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1756073308; cv=none; b=L9Wy3QVJnmVQD7gr+huhW1ed+h0exKF2TPjv/hJq90RuxQhMLDtZ101ed5dBordpmDn+pQcNQ66lrD8kBKOQcyedjmZpB4McWpqBttQCmb367uVpgWJLKVw7tlCpQkxqj3MfuV5zJpFN+rErqE870woE8D5THJvEuIWEGP9IkBw= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1756073308; c=relaxed/simple; bh=Cqi1KjttiDdhWqKLMTl19w8vHID7id3z9wMy5PMIhaQ=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=UNF06n6uiClGFxwoqvgOmg4N2gHdsaOm3Ujd7PxXl3kzVOD3m2GaHjSf3y8pdkrLJZVuEsSlDdpiZtf8Qv3MeMQKvGPvr42ZmaD42h+fDhDsPsTJLlhOTwkuS3d8x6tnincl2wQ8jf5B/+bzgM82D6njsxRnJl+Y91dkX8JocoM= 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=tDtCEYTx; dkim=pass (2048-bit key) header.d=mailbox.org header.i=@mailbox.org header.b=X9r24EEH; arc=none smtp.client-ip=80.241.56.161 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="tDtCEYTx"; dkim=pass (2048-bit key) header.d=mailbox.org header.i=@mailbox.org header.b="X9r24EEH" Received: from smtp102.mailbox.org (smtp102.mailbox.org [10.196.197.102]) (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-103.mailbox.org (Postfix) with ESMTPS id 4c97NL4qn4z9tcN; Mon, 25 Aug 2025 00:08:18 +0200 (CEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=mailbox.org; s=mail20150812; t=1756073298; 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=XaTXer8NQKVAFFJmOvJcASY6ItCMeUQ4gw1of3TcEi0=; b=tDtCEYTx0ObxfZzcswGBBnRrWsHs2RjCfvrR1AmZwVDiTquc9Dw+I64eY8ld5bvjlLs31k BDVetHnNAETtYVTGmetkRvH+3WzGH0gReQd3mkydXWdqot2d401lzSZiHMQHFAgQLV3lD/ Vw7foJhmt0VF92f7LcSSsIaqsnLgYXsCQlaR2erdqIy6VCAFRE8o/gHZVOab3jXqti+1Pe WEycOMpEIE/7+bqU2iQrCcC2/GXlRkhuwlW26j6wk4T+EOLk4q/4A71esQnS4RDBqqfUop xIK4Ra1pUdFxTLX1kq0CQV8XklgXiZw+WywEI/3uD9AZRIqTZ9P5g3auNk4tRw== From: Lukasz Majewski DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=mailbox.org; s=mail20150812; t=1756073296; 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=XaTXer8NQKVAFFJmOvJcASY6ItCMeUQ4gw1of3TcEi0=; b=X9r24EEHGXWEkK6wbbYkzc4E1rTGQg0oRAtqHLlmJmnE8QsJO0g27ZRBLPmXht5+9cJnCE Cc+XrV4KPBcuM3ybL5RthHvpYDtx1RM2Qjy+0Zolrp7w8LMNhYNO3hnWdS7zRxTYSuqxjE RbWbE63waQbtzWrsW73pKVJtYOjtSdPNAP5lmbxuwqLu2x4j495lWxNx9tPFZ2YZIXw/3P tpkIs7kJzg3aGC+PHySLa8W75LRrCd/B0OZWVQgSlrNoim57IYPc1MwW8DaIVzudZ9XqZQ nYpF37otoXEK/Mk/IjMYsRta9AVNFYyFB4WvGpdRzjvBfNwONqKKMHgD3HyWrA== 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 v19 3/7] net: mtip: Add buffers management functions to the L2 switch driver Date: Mon, 25 Aug 2025 00:07:32 +0200 Message-Id: <20250824220736.1760482-4-lukasz.majewski@mailbox.org> In-Reply-To: <20250824220736.1760482-1-lukasz.majewski@mailbox.org> References: <20250824220736.1760482-1-lukasz.majewski@mailbox.org> Precedence: bulk X-Mailing-List: imx@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-MBO-RS-META: ksg1j4uogupyrtkhayrgucqi1xji9fm4 X-MBO-RS-ID: 1d8c858c0d90626d114 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 - v19: - 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 604c0ab350d6..61380f09e2f1 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, static void mtip_free_buffers(struct net_device *dev) { + struct mtip_ndev_priv *priv = netdev_priv(dev); + struct switch_enet_private *fep = priv->fep; + int i; + + for (i = 0; i < RX_RING_SIZE; i++) { + page_pool_put_full_page(fep->page_pool, + fep->page[i], false); + fep->page[i] = NULL; + } + + page_pool_destroy(fep->page_pool); + fep->page_pool = NULL; + + for (i = 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 = { + .order = 0, + .flags = PP_FLAG_DMA_MAP | PP_FLAG_DMA_SYNC_DEV, + .pool_size = size, + .nid = dev_to_node(&fep->pdev->dev), + .dev = &fep->pdev->dev, + .dma_dir = DMA_FROM_DEVICE, + .offset = 0, + .max_len = MTIP_SWITCH_RX_FRSIZE, + }; + int ret = 0; + + fep->page_pool = page_pool_create(&pp_params); + if (IS_ERR(fep->page_pool)) { + ret = PTR_ERR(fep->page_pool); + fep->page_pool = NULL; + } + + return ret; } static int mtip_alloc_buffers(struct net_device *dev) { + struct mtip_ndev_priv *priv = netdev_priv(dev); + struct switch_enet_private *fep = priv->fep; + struct cbd_t *bdp; + struct page *page; + int i, ret; + + ret = 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 = fep->rx_bd_base; + for (i = 0; i < RX_RING_SIZE; i++) { + page = 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 = page_pool_get_dma_addr(page); + fep->page[i] = page; + + bdp->cbd_sc = BD_ENET_RX_EMPTY; + bdp++; + } + + mtip_set_last_buf_to_wrap(bdp); + + bdp = fep->tx_bd_base; + for (i = 0; i < TX_RING_SIZE; i++) { + fep->tx_bounce[i] = kmalloc(MTIP_SWITCH_TX_FRSIZE, GFP_KERNEL); + if (!fep->tx_bounce[i]) + goto err; + + bdp->cbd_sc = 0; + bdp->cbd_bufaddr = 0; + bdp++; + } + + mtip_set_last_buf_to_wrap(bdp); + return 0; + + err: + mtip_free_buffers(dev); + return -ENOMEM; } static int mtip_rx_napi(struct napi_struct *napi, int budget) -- 2.39.5