From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from dpdk.org (dpdk.org [92.243.14.124]) by inbox.dpdk.org (Postfix) with ESMTP id DFD73A0542; Thu, 13 Feb 2020 09:48:34 +0100 (CET) Received: from [92.243.14.124] (localhost [127.0.0.1]) by dpdk.org (Postfix) with ESMTP id CA6B01BFAD; Thu, 13 Feb 2020 09:48:10 +0100 (CET) Received: from mga06.intel.com (mga06.intel.com [134.134.136.31]) by dpdk.org (Postfix) with ESMTP id EFCC91BEE5; Thu, 13 Feb 2020 09:48:06 +0100 (CET) X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from orsmga001.jf.intel.com ([10.7.209.18]) by orsmga104.jf.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 13 Feb 2020 00:48:06 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.70,436,1574150400"; d="scan'208";a="313670548" Received: from silpixa00373417.ir.intel.com (HELO silpixa00373417.ger.corp.intel.com) ([10.237.223.96]) by orsmga001.jf.intel.com with ESMTP; 13 Feb 2020 00:48:04 -0800 From: Ciara Loftus To: dev@dpdk.org Cc: xiaolong.ye@intel.com, Ciara Loftus , stable@dpdk.org Date: Thu, 13 Feb 2020 08:49:14 +0000 Message-Id: <20200213084914.54755-4-ciara.loftus@intel.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20200213084914.54755-1-ciara.loftus@intel.com> References: <20200213084914.54755-1-ciara.loftus@intel.com> Subject: [dpdk-dev] [PATCH v4 3/3] net/af_xdp: fix maximum MTU value X-BeenThere: dev@dpdk.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: DPDK patches and discussions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dev-bounces@dpdk.org Sender: "dev" The maximum MTU for af_xdp zero copy is equal to the page size less the frame overhead introduced by AF_XDP (XDP HR = 256) and DPDK (frame headroom = 320). The patch updates this value to reflect this. This change also makes it possible to remove unneeded constants for both zero-copy and copy mode. Fixes: d8a210774e1d ("net/af_xdp: support unaligned umem chunks") Cc: stable@dpdk.org Signed-off-by: Ciara Loftus --- drivers/net/af_xdp/rte_eth_af_xdp.c | 23 +++++++++++------------ 1 file changed, 11 insertions(+), 12 deletions(-) diff --git a/drivers/net/af_xdp/rte_eth_af_xdp.c b/drivers/net/af_xdp/rte_eth_af_xdp.c index a0edfc3cd3..06124ba789 100644 --- a/drivers/net/af_xdp/rte_eth_af_xdp.c +++ b/drivers/net/af_xdp/rte_eth_af_xdp.c @@ -58,13 +58,6 @@ static int af_xdp_logtype; #define ETH_AF_XDP_FRAME_SIZE 2048 #define ETH_AF_XDP_NUM_BUFFERS 4096 -#ifdef XDP_UMEM_UNALIGNED_CHUNK_FLAG -#define ETH_AF_XDP_MBUF_OVERHEAD 128 /* sizeof(struct rte_mbuf) */ -#define ETH_AF_XDP_DATA_HEADROOM \ - (ETH_AF_XDP_MBUF_OVERHEAD + RTE_PKTMBUF_HEADROOM) -#else -#define ETH_AF_XDP_DATA_HEADROOM 0 -#endif #define ETH_AF_XDP_DFLT_NUM_DESCS XSK_RING_CONS__DEFAULT_NUM_DESCS #define ETH_AF_XDP_DFLT_START_QUEUE_IDX 0 #define ETH_AF_XDP_DFLT_QUEUE_COUNT 1 @@ -601,7 +594,14 @@ eth_dev_info(struct rte_eth_dev *dev, struct rte_eth_dev_info *dev_info) dev_info->max_tx_queues = internals->queue_cnt; dev_info->min_mtu = RTE_ETHER_MIN_MTU; - dev_info->max_mtu = ETH_AF_XDP_FRAME_SIZE - ETH_AF_XDP_DATA_HEADROOM; +#if defined(XDP_UMEM_UNALIGNED_CHUNK_FLAG) + dev_info->max_mtu = getpagesize() - + sizeof(struct rte_mempool_objhdr) - + sizeof(struct rte_mbuf) - + RTE_PKTMBUF_HEADROOM - XDP_PACKET_HEADROOM; +#else + dev_info->max_mtu = ETH_AF_XDP_FRAME_SIZE - XDP_PACKET_HEADROOM; +#endif dev_info->default_rxportconf.nb_queues = 1; dev_info->default_txportconf.nb_queues = 1; @@ -803,7 +803,7 @@ xsk_umem_info *xdp_umem_configure(struct pmd_internals *internals, .fill_size = ETH_AF_XDP_DFLT_NUM_DESCS, .comp_size = ETH_AF_XDP_DFLT_NUM_DESCS, .frame_size = ETH_AF_XDP_FRAME_SIZE, - .frame_headroom = ETH_AF_XDP_DATA_HEADROOM }; + .frame_headroom = 0 }; char ring_name[RTE_RING_NAMESIZE]; char mz_name[RTE_MEMZONE_NAMESIZE]; int ret; @@ -828,8 +828,7 @@ xsk_umem_info *xdp_umem_configure(struct pmd_internals *internals, for (i = 0; i < ETH_AF_XDP_NUM_BUFFERS; i++) rte_ring_enqueue(umem->buf_ring, - (void *)(i * ETH_AF_XDP_FRAME_SIZE + - ETH_AF_XDP_DATA_HEADROOM)); + (void *)(i * ETH_AF_XDP_FRAME_SIZE)); snprintf(mz_name, sizeof(mz_name), "af_xdp_umem_%s_%u", internals->if_name, rxq->xsk_queue_idx); @@ -938,7 +937,7 @@ eth_rx_queue_setup(struct rte_eth_dev *dev, /* Now get the space available for data in the mbuf */ buf_size = rte_pktmbuf_data_room_size(mb_pool) - RTE_PKTMBUF_HEADROOM; - data_size = ETH_AF_XDP_FRAME_SIZE - ETH_AF_XDP_DATA_HEADROOM; + data_size = ETH_AF_XDP_FRAME_SIZE; if (data_size > buf_size) { AF_XDP_LOG(ERR, "%s: %d bytes will not fit in mbuf (%d bytes)\n", -- 2.17.1