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 X-Spam-Level: X-Spam-Status: No, score=-10.1 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 2DA67C47404 for ; Wed, 9 Oct 2019 23:19:20 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 02629206C0 for ; Wed, 9 Oct 2019 23:19:20 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1570663160; bh=JLNXVGLu3fSdLaagh2aiiYWWTJ0+ii7/kTh3wAQa5+g=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=V7lWwPWE0UFqRjpji+V9PaDLm2DazvE6j2AD20nOQHAdPR9gv8uaZzcRdDcHRWLLQ gaVbHZ41ws6/aydm+pinn8xQ0i/fX90JIVVa4mNRUzhYseVIAlNEBFfdYjZq9kX+Bp MrKEhFOQT3+gZAwM1sZD69oBdKeJYwSK6K4Yn7sA= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1732554AbfJIXTS (ORCPT ); Wed, 9 Oct 2019 19:19:18 -0400 Received: from mail.kernel.org ([198.145.29.99]:37076 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1731072AbfJIXTQ (ORCPT ); Wed, 9 Oct 2019 19:19:16 -0400 Received: from localhost.localdomain (unknown [151.66.37.67]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 918CE206C0; Wed, 9 Oct 2019 23:19:13 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1570663155; bh=JLNXVGLu3fSdLaagh2aiiYWWTJ0+ii7/kTh3wAQa5+g=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=ux9G77uhFrwpG4nDfDqJwArqpCh1qKMYlM8RRQ12GNAPtbi1htTsMAuMzTlt9Gq25 yjJgvmZvXsPyUlNXr0c1HiIFsVacpzyApQdpGLm/ssMeVnbpXXb/H3EOscavWAg6IS 3jl66AOZsyV3Tqst6DalTowS/DGdoVGjPLYchyiU= From: Lorenzo Bianconi To: netdev@vger.kernel.org Cc: lorenzo.bianconi@redhat.com, davem@davemloft.net, thomas.petazzoni@bootlin.com, brouer@redhat.com, ilias.apalodimas@linaro.org, matteo.croce@redhat.com, mw@semihalf.com Subject: [PATCH v2 net-next 7/8] net: mvneta: make tx buffer array agnostic Date: Thu, 10 Oct 2019 01:18:37 +0200 Message-Id: <2f89b04bf35ed750bedd000c9b0117d7aa527014.1570662004.git.lorenzo@kernel.org> X-Mailer: git-send-email 2.21.0 In-Reply-To: References: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Sender: netdev-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org Allow tx buffer array to contain both skb and xdp buffers in order to enable xdp frame recycling adding XDP_TX verdict support Signed-off-by: Lorenzo Bianconi --- drivers/net/ethernet/marvell/mvneta.c | 66 +++++++++++++++++---------- 1 file changed, 43 insertions(+), 23 deletions(-) diff --git a/drivers/net/ethernet/marvell/mvneta.c b/drivers/net/ethernet/marvell/mvneta.c index 91d8cb45104f..5a21d03e9c7b 100644 --- a/drivers/net/ethernet/marvell/mvneta.c +++ b/drivers/net/ethernet/marvell/mvneta.c @@ -561,6 +561,20 @@ struct mvneta_rx_desc { }; #endif +enum mvneta_tx_buf_type { + MVNETA_TYPE_SKB, + MVNETA_TYPE_XDP_TX, + MVNETA_TYPE_XDP_NDO, +}; + +struct mvneta_tx_buf { + enum mvneta_tx_buf_type type; + union { + struct xdp_frame *xdpf; + struct sk_buff *skb; + }; +}; + struct mvneta_tx_queue { /* Number of this TX queue, in the range 0-7 */ u8 id; @@ -576,8 +590,8 @@ struct mvneta_tx_queue { int tx_stop_threshold; int tx_wake_threshold; - /* Array of transmitted skb */ - struct sk_buff **tx_skb; + /* Array of transmitted buffers */ + struct mvneta_tx_buf *buf; /* Index of last TX DMA descriptor that was inserted */ int txq_put_index; @@ -1780,14 +1794,9 @@ static void mvneta_txq_bufs_free(struct mvneta_port *pp, int i; for (i = 0; i < num; i++) { + struct mvneta_tx_buf *buf = &txq->buf[txq->txq_get_index]; struct mvneta_tx_desc *tx_desc = txq->descs + txq->txq_get_index; - struct sk_buff *skb = txq->tx_skb[txq->txq_get_index]; - - if (skb) { - bytes_compl += skb->len; - pkts_compl++; - } mvneta_txq_inc_get(txq); @@ -1795,9 +1804,12 @@ static void mvneta_txq_bufs_free(struct mvneta_port *pp, dma_unmap_single(pp->dev->dev.parent, tx_desc->buf_phys_addr, tx_desc->data_size, DMA_TO_DEVICE); - if (!skb) + if (!buf->skb) continue; - dev_kfree_skb_any(skb); + + bytes_compl += buf->skb->len; + pkts_compl++; + dev_kfree_skb_any(buf->skb); } netdev_tx_completed_queue(nq, pkts_compl, bytes_compl); @@ -2318,16 +2330,19 @@ static inline void mvneta_tso_put_hdr(struct sk_buff *skb, struct mvneta_port *pp, struct mvneta_tx_queue *txq) { - struct mvneta_tx_desc *tx_desc; int hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb); + struct mvneta_tx_buf *buf = &txq->buf[txq->txq_put_index]; + struct mvneta_tx_desc *tx_desc; - txq->tx_skb[txq->txq_put_index] = NULL; tx_desc = mvneta_txq_next_desc_get(txq); tx_desc->data_size = hdr_len; tx_desc->command = mvneta_skb_tx_csum(pp, skb); tx_desc->command |= MVNETA_TXD_F_DESC; tx_desc->buf_phys_addr = txq->tso_hdrs_phys + txq->txq_put_index * TSO_HEADER_SIZE; + buf->type = MVNETA_TYPE_SKB; + buf->skb = NULL; + mvneta_txq_inc_put(txq); } @@ -2336,6 +2351,7 @@ mvneta_tso_put_data(struct net_device *dev, struct mvneta_tx_queue *txq, struct sk_buff *skb, char *data, int size, bool last_tcp, bool is_last) { + struct mvneta_tx_buf *buf = &txq->buf[txq->txq_put_index]; struct mvneta_tx_desc *tx_desc; tx_desc = mvneta_txq_next_desc_get(txq); @@ -2349,7 +2365,8 @@ mvneta_tso_put_data(struct net_device *dev, struct mvneta_tx_queue *txq, } tx_desc->command = 0; - txq->tx_skb[txq->txq_put_index] = NULL; + buf->type = MVNETA_TYPE_SKB; + buf->skb = NULL; if (last_tcp) { /* last descriptor in the TCP packet */ @@ -2357,7 +2374,7 @@ mvneta_tso_put_data(struct net_device *dev, struct mvneta_tx_queue *txq, /* last descriptor in SKB */ if (is_last) - txq->tx_skb[txq->txq_put_index] = skb; + buf->skb = skb; } mvneta_txq_inc_put(txq); return 0; @@ -2442,6 +2459,7 @@ static int mvneta_tx_frag_process(struct mvneta_port *pp, struct sk_buff *skb, int i, nr_frags = skb_shinfo(skb)->nr_frags; for (i = 0; i < nr_frags; i++) { + struct mvneta_tx_buf *buf = &txq->buf[txq->txq_put_index]; skb_frag_t *frag = &skb_shinfo(skb)->frags[i]; void *addr = skb_frag_address(frag); @@ -2461,12 +2479,13 @@ static int mvneta_tx_frag_process(struct mvneta_port *pp, struct sk_buff *skb, if (i == nr_frags - 1) { /* Last descriptor */ tx_desc->command = MVNETA_TXD_L_DESC | MVNETA_TXD_Z_PAD; - txq->tx_skb[txq->txq_put_index] = skb; + buf->skb = skb; } else { /* Descriptor in the middle: Not First, Not Last */ tx_desc->command = 0; - txq->tx_skb[txq->txq_put_index] = NULL; + buf->skb = NULL; } + buf->type = MVNETA_TYPE_SKB; mvneta_txq_inc_put(txq); } @@ -2494,6 +2513,7 @@ static netdev_tx_t mvneta_tx(struct sk_buff *skb, struct net_device *dev) struct mvneta_port *pp = netdev_priv(dev); u16 txq_id = skb_get_queue_mapping(skb); struct mvneta_tx_queue *txq = &pp->txqs[txq_id]; + struct mvneta_tx_buf *buf = &txq->buf[txq->txq_put_index]; struct mvneta_tx_desc *tx_desc; int len = skb->len; int frags = 0; @@ -2526,16 +2546,17 @@ static netdev_tx_t mvneta_tx(struct sk_buff *skb, struct net_device *dev) goto out; } + buf->type = MVNETA_TYPE_SKB; if (frags == 1) { /* First and Last descriptor */ tx_cmd |= MVNETA_TXD_FLZ_DESC; tx_desc->command = tx_cmd; - txq->tx_skb[txq->txq_put_index] = skb; + buf->skb = skb; mvneta_txq_inc_put(txq); } else { /* First but not Last */ tx_cmd |= MVNETA_TXD_F_DESC; - txq->tx_skb[txq->txq_put_index] = NULL; + buf->skb = NULL; mvneta_txq_inc_put(txq); tx_desc->command = tx_cmd; /* Continue with other skb fragments */ @@ -3121,9 +3142,8 @@ static int mvneta_txq_sw_init(struct mvneta_port *pp, txq->last_desc = txq->size - 1; - txq->tx_skb = kmalloc_array(txq->size, sizeof(*txq->tx_skb), - GFP_KERNEL); - if (!txq->tx_skb) { + txq->buf = kmalloc_array(txq->size, sizeof(*txq->buf), GFP_KERNEL); + if (!txq->buf) { dma_free_coherent(pp->dev->dev.parent, txq->size * MVNETA_DESC_ALIGNED_SIZE, txq->descs, txq->descs_phys); @@ -3135,7 +3155,7 @@ static int mvneta_txq_sw_init(struct mvneta_port *pp, txq->size * TSO_HEADER_SIZE, &txq->tso_hdrs_phys, GFP_KERNEL); if (!txq->tso_hdrs) { - kfree(txq->tx_skb); + kfree(txq->buf); dma_free_coherent(pp->dev->dev.parent, txq->size * MVNETA_DESC_ALIGNED_SIZE, txq->descs, txq->descs_phys); @@ -3188,7 +3208,7 @@ static void mvneta_txq_sw_deinit(struct mvneta_port *pp, { struct netdev_queue *nq = netdev_get_tx_queue(pp->dev, txq->id); - kfree(txq->tx_skb); + kfree(txq->buf); if (txq->tso_hdrs) dma_free_coherent(pp->dev->dev.parent, -- 2.21.0