From mboxrd@z Thu Jan 1 00:00:00 1970 From: Andrzej Ostruszka Subject: [PATCH 3/8] net/mvneta: support for setting of MTU Date: Tue, 28 Aug 2018 17:10:25 +0200 Message-ID: <1535469030-18647-4-git-send-email-amo@semihalf.com> References: <1535469030-18647-1-git-send-email-amo@semihalf.com> Cc: nsamsono@marvell.com To: dev@dpdk.org Return-path: Received: from mail-lf1-f67.google.com (mail-lf1-f67.google.com [209.85.167.67]) by dpdk.org (Postfix) with ESMTP id 3DBE737B7 for ; Tue, 28 Aug 2018 17:10:36 +0200 (CEST) Received: by mail-lf1-f67.google.com with SMTP id i7-v6so1679525lfh.5 for ; Tue, 28 Aug 2018 08:10:36 -0700 (PDT) In-Reply-To: <1535469030-18647-1-git-send-email-amo@semihalf.com> List-Id: DPDK patches and discussions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dev-bounces@dpdk.org Sender: "dev" From: Natalie Samsonov Add callback for setting of MTU. Signed-off-by: Natalie Samsonov Signed-off-by: Zyta Szpak --- drivers/net/mvneta/mvneta_ethdev.c | 78 ++++++++++++++++++++++++++++++++++++++ 1 file changed, 78 insertions(+) diff --git a/drivers/net/mvneta/mvneta_ethdev.c b/drivers/net/mvneta/mvneta_ethdev.c index a480b14..eded4eb 100644 --- a/drivers/net/mvneta/mvneta_ethdev.c +++ b/drivers/net/mvneta/mvneta_ethdev.c @@ -1032,6 +1032,77 @@ static void mvneta_txq_info_get(struct rte_eth_dev *dev, uint16_t tx_queue_id, } /** + * DPDK callback to change the MTU. + * + * Setting the MTU affects hardware MRU (packets larger than the MRU + * will be dropped). + * + * @param dev + * Pointer to Ethernet device structure. + * @param mtu + * New MTU. + * + * @return + * 0 on success, negative error value otherwise. + */ +static int +mvneta_mtu_set(struct rte_eth_dev *dev, uint16_t mtu) +{ + struct mvneta_priv *priv = dev->data->dev_private; + uint16_t mbuf_data_size = 0; /* SW buffer size */ + uint16_t mru; + int ret; + + mru = MRVL_NETA_MTU_TO_MRU(mtu); + /* + * min_rx_buf_size is equal to mbuf data size + * if pmd didn't set it differently + */ + mbuf_data_size = dev->data->min_rx_buf_size - RTE_PKTMBUF_HEADROOM; + /* Prevent PMD from: + * - setting mru greater than the mbuf size resulting in + * hw and sw buffer size mismatch + * - setting mtu that requires the support of scattered packets + * when this feature has not been enabled/supported so far. + */ + if (!dev->data->scattered_rx && + (mru + MRVL_NETA_PKT_OFFS > mbuf_data_size)) { + mru = mbuf_data_size - MRVL_NETA_PKT_OFFS; + mtu = MRVL_NETA_MRU_TO_MTU(mru); + MVNETA_LOG(WARNING, "MTU too big, max MTU possible limitted by" + " current mbuf size: %u. Set MTU to %u, MRU to %u\n", + mbuf_data_size, mtu, mru); + } + + if (mtu < ETHER_MIN_MTU || mru > MVNETA_PKT_SIZE_MAX) { + MVNETA_LOG(ERR, "Invalid MTU [%u] or MRU [%u]\n", mtu, mru); + return -EINVAL; + } + + dev->data->mtu = mtu; + dev->data->dev_conf.rxmode.max_rx_pkt_len = mru - MV_MH_SIZE; + + if (!priv->ppio) + /* It is OK. New MTU will be set later on mvneta_dev_start */ + return 0; + + ret = neta_ppio_set_mru(priv->ppio, mru); + if (ret) { + MVNETA_LOG(ERR, "Failed to change MRU\n"); + return ret; + } + + ret = neta_ppio_set_mtu(priv->ppio, mtu); + if (ret) { + MVNETA_LOG(ERR, "Failed to change MTU\n"); + return ret; + } + MVNETA_LOG(INFO, "MTU changed to %u, MRU = %u\n", mtu, mru); + + return 0; +} + +/** * DPDK callback to bring the link up. * * @param dev @@ -1305,6 +1376,12 @@ mvneta_dev_start(struct rte_eth_dev *dev) } } + ret = mvneta_mtu_set(dev, dev->data->mtu); + if (ret) { + MVNETA_LOG(ERR, "Failed to set MTU %d\n", dev->data->mtu); + goto out; + } + ret = mvneta_dev_set_link_up(dev); if (ret) { MVNETA_LOG(ERR, "Failed to set link up\n"); @@ -1420,6 +1497,7 @@ static const struct eth_dev_ops mvneta_ops = { .dev_set_link_down = mvneta_dev_set_link_down, .dev_close = mvneta_dev_close, .mac_addr_set = mvneta_mac_addr_set, + .mtu_set = mvneta_mtu_set, .dev_infos_get = mvneta_dev_infos_get, .dev_supported_ptypes_get = mvneta_dev_supported_ptypes_get, .rxq_info_get = mvneta_rxq_info_get, -- 2.7.4