From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mails.dpdk.org (mails.dpdk.org [217.70.189.124]) by inbox.dpdk.org (Postfix) with ESMTP id CD000A0543; Wed, 5 Oct 2022 17:31:56 +0200 (CEST) Received: from [217.70.189.124] (localhost [127.0.0.1]) by mails.dpdk.org (Postfix) with ESMTP id B5655427EE; Wed, 5 Oct 2022 17:31:56 +0200 (CEST) Received: from mga14.intel.com (mga14.intel.com [192.55.52.115]) by mails.dpdk.org (Postfix) with ESMTP id 9D474427F7 for ; Wed, 5 Oct 2022 17:31:54 +0200 (CEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1664983914; x=1696519914; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=FlO6GdIAulPCcNXw+NOl66yEsFU4WYA4kbo2NHRzHE8=; b=fSp4sXdkK3Xgs70g+qEmHqHuFDozRkIPkJkCN7lEjzYEJthGRYJSy8J4 l2C3bSQaK2xhMTWQgIC/4X9UBOdy0ZfuNdlZ9WvFXuS8Qr4U3Ormkb4QI 4rQgV6JNoJ6TY6MGgt2g/pwfMXzxnzoumTWUXa2/LUdEvOXtRW4i60aRv CNxRP15p+gdyNJ3AyxgbhpX3dmJPoRvfqlkaTnom6NCyXaaC7Y0X5SFiZ 4ymP4YYo605bz4YpYdIwnY1nIqNTQ3x1CJpElgMpcmYRRcvytu7zH3ghu Qi9gPgvPmbqB3mI4yPQlTB/ae8rgvaw2/RHgfwZjSs5X6YX2tnjibGw0z Q==; X-IronPort-AV: E=McAfee;i="6500,9779,10491"; a="303165939" X-IronPort-AV: E=Sophos;i="5.95,161,1661842800"; d="scan'208";a="303165939" Received: from fmsmga006.fm.intel.com ([10.253.24.20]) by fmsmga103.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 05 Oct 2022 08:31:53 -0700 X-IronPort-AV: E=McAfee;i="6500,9779,10491"; a="869434649" X-IronPort-AV: E=Sophos;i="5.95,161,1661842800"; d="scan'208";a="869434649" Received: from unknown (HELO localhost.localdomain) ([10.239.252.55]) by fmsmga006-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 05 Oct 2022 08:31:48 -0700 From: Yuan Wang To: dev@dpdk.org, Thomas Monjalon , Ferruh Yigit , Andrew Rybchenko Cc: ferruh.yigit@xilinx.com, mdr@ashroe.eu, xiaoyun.li@intel.com, aman.deep.singh@intel.com, yuying.zhang@intel.com, qi.z.zhang@intel.com, qiming.yang@intel.com, jerinjacobk@gmail.com, viacheslavo@nvidia.com, stephen@networkplumber.org, xuan.ding@intel.com, hpothula@marvell.com, yaqi.tang@intel.com, Yuan Wang , Wenxuan Wu Subject: [PATCH v8 2/4] ethdev: introduce protocol hdr based buffer split Date: Thu, 6 Oct 2022 07:18:34 +0800 Message-Id: <20221005231836.215112-3-yuanx.wang@intel.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20221005231836.215112-1-yuanx.wang@intel.com> References: <20220812181552.2908067-1-yuanx.wang@intel.com> <20221005231836.215112-1-yuanx.wang@intel.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-BeenThere: dev@dpdk.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: DPDK patches and discussions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dev-bounces@dpdk.org Currently, Rx buffer split supports length based split. With Rx queue offload RTE_ETH_RX_OFFLOAD_BUFFER_SPLIT enabled and Rx packet segment configured, PMD will be able to split the received packets into multiple segments. However, length based buffer split is not suitable for NICs that do split based on protocol headers. Given an arbitrarily variable length in Rx packet segment, it is almost impossible to pass a fixed protocol header to driver. Besides, the existence of tunneling results in the composition of a packet is various, which makes the situation even worse. This patch extends current buffer split to support protocol header based buffer split. A new proto_hdr field is introduced in the reserved field of rte_eth_rxseg_split structure to specify protocol header. The proto_hdr field defines the split position of packet, splitting will always happen after the protocol header defined in the Rx packet segment. When Rx queue offload RTE_ETH_RX_OFFLOAD_BUFFER_SPLIT is enabled and corresponding protocol header is configured, driver will split the ingress packets into multiple segments. Examples for proto_hdr field defines: To split after ETH-IPV4-UDP, it should be defined as proto_hdr = RTE_PTYPE_L2_ETHER | RTE_PTYPE_L3_IPV4_EXT_UNKNOWN | RTE_PTYPE_L4_UDP For inner ETH-IPV4-UDP, it should be defined as proto_hdr = RTE_PTYPE_TUNNEL_GRENAT | RTE_PTYPE_INNER_L2_ETHER | RTE_PTYPE_INNER_L3_IPV4_EXT_UNKNOWN | RTE_PTYPE_INNER_L4_UDP If the protocol header is repeated with the previously defined one, the repeated part can be omitted. For example, split after ETH, ETH-IPV4 and ETH-IPV4-UDP, it should be defined as proto_hdr0 = RTE_PTYPE_L2_ETHER proto_hdr1 = RTE_PTYPE_L3_IPV4_EXT_UNKNOWN proto_hdr2 = RTE_PTYPE_L4_UDP struct rte_eth_rxseg_split { struct rte_mempool *mp; /* memory pools to allocate segment from */ uint16_t length; /* segment maximal data length, configures split point */ uint16_t offset; /* data offset from beginning of mbuf data buffer */ /** * Proto_hdr defines a bit mask of the protocol sequence as * RTE_PTYPE_*, configures split point. The last RTE_PTYPE* * in the mask indicates the split position. * If one protocol header is defined to split packets into two * segments, for non-tunneling packets, the complete protocol * sequence should be defined. * For tunneling packets, for simplicity, * only the tunnel and inner part of comple protocol sequence * is required. * If several protocol headers are defined to split packets into * multi-segments, the repeated parts of adjacent segments * should be omitted. */ uint32_t proto_hdr; }; If protocol header split can be supported by a PMD, the rte_eth_buffer_split_get_supported_hdr_ptypes function can be use to obtain a list of these protocol headers. For example, let's suppose we configured the Rx queue with the following segments: seg0 - pool0, proto_hdr0=RTE_PTYPE_L2_ETHER | RTE_PTYPE_L3_IPV4, off0=2B seg1 - pool1, proto_hdr1=RTE_PTYPE_L4_UDP, off1=128B seg2 - pool2, off1=0B The packet consists of ETH_IPV4_UDP_PAYLOAD will be split like following: seg0 - ipv4 header @ RTE_PKTMBUF_HEADROOM + 2 in mbuf from pool0 seg1 - udp header @ 128 in mbuf from pool1 seg2 - payload @ 0 in mbuf from pool2 Note: NIC will only do split when the packets exactly match all the protocol headers in the segments. For example, if ARP packets received with above config, the NIC won't do split for ARP packets since it does not contains ipv4 header and udp header. These packets will be put into the last valid mempool, with zero offset. Now buffer split can be configured in two modes. For length based buffer split, the mp, length, offset field in Rx packet segment should be configured, while the proto_hdr field will be ignored. For protocol header based buffer split, the mp, offset, proto_hdr field in Rx packet segment should be configured, while the length field will be ignored. The split limitations imposed by underlying driver is reported in the rte_eth_dev_info->rx_seg_capa field. The memory attributes for the split parts may differ either, dpdk memory and external memory, respectively. Signed-off-by: Yuan Wang Signed-off-by: Xuan Ding Signed-off-by: Wenxuan Wu --- doc/guides/rel_notes/release_22_11.rst | 4 ++ lib/ethdev/rte_ethdev.c | 89 ++++++++++++++++++++++---- lib/ethdev/rte_ethdev.h | 34 +++++++++- 3 files changed, 115 insertions(+), 12 deletions(-) diff --git a/doc/guides/rel_notes/release_22_11.rst b/doc/guides/rel_notes/release_22_11.rst index 141fd9442b..4c3a7f8b8b 100644 --- a/doc/guides/rel_notes/release_22_11.rst +++ b/doc/guides/rel_notes/release_22_11.rst @@ -127,6 +127,10 @@ New Features * Added ``rte_eth_buffer_split_get_supported_hdr_ptypes()``, to get supported header protocols of a PMD to split. + * Ethdev: The ``reserved`` field in the ``rte_eth_rxseg_split`` structure is + replaced with ``proto_hdr`` to support protocol header based buffer split. + User can choose length or protocol header to configure buffer split + according to NIC's capability. Removed Items diff --git a/lib/ethdev/rte_ethdev.c b/lib/ethdev/rte_ethdev.c index ee3b490889..60fe6eb2bd 100644 --- a/lib/ethdev/rte_ethdev.c +++ b/lib/ethdev/rte_ethdev.c @@ -1650,14 +1650,18 @@ rte_eth_dev_is_removed(uint16_t port_id) } static int -rte_eth_rx_queue_check_split(const struct rte_eth_rxseg_split *rx_seg, - uint16_t n_seg, uint32_t *mbp_buf_size, - const struct rte_eth_dev_info *dev_info) +rte_eth_rx_queue_check_split(uint16_t port_id, + const struct rte_eth_rxseg_split *rx_seg, + uint16_t n_seg, uint32_t *mbp_buf_size, + const struct rte_eth_dev_info *dev_info) { const struct rte_eth_rxseg_capa *seg_capa = &dev_info->rx_seg_capa; struct rte_mempool *mp_first; uint32_t offset_mask; uint16_t seg_idx; + int ptype_cnt; + uint32_t *ptypes; + int i; if (n_seg > seg_capa->max_nseg) { RTE_ETHDEV_LOG(ERR, @@ -1675,6 +1679,7 @@ rte_eth_rx_queue_check_split(const struct rte_eth_rxseg_split *rx_seg, struct rte_mempool *mpl = rx_seg[seg_idx].mp; uint32_t length = rx_seg[seg_idx].length; uint32_t offset = rx_seg[seg_idx].offset; + uint32_t proto_hdr = rx_seg[seg_idx].proto_hdr; if (mpl == NULL) { RTE_ETHDEV_LOG(ERR, "null mempool pointer\n"); @@ -1708,13 +1713,75 @@ rte_eth_rx_queue_check_split(const struct rte_eth_rxseg_split *rx_seg, } offset += seg_idx != 0 ? 0 : RTE_PKTMBUF_HEADROOM; *mbp_buf_size = rte_pktmbuf_data_room_size(mpl); - length = length != 0 ? length : *mbp_buf_size; - if (*mbp_buf_size < length + offset) { - RTE_ETHDEV_LOG(ERR, - "%s mbuf_data_room_size %u < %u (segment length=%u + segment offset=%u)\n", - mpl->name, *mbp_buf_size, - length + offset, length, offset); - return -EINVAL; + + if (proto_hdr > 0) { + /* Split based on protocol headers. */ + if (length != 0) { + RTE_ETHDEV_LOG(ERR, + "Do not set length split and protocol split within a segment\n" + ); + return -EINVAL; + } + + if (seg_idx == n_seg - 1) { + RTE_ETHDEV_LOG(ERR, + "The proto_hdr in the last segment should be 0\n" + ); + return -EINVAL; + } + + if (*mbp_buf_size < offset) { + RTE_ETHDEV_LOG(ERR, + "%s mbuf_data_room_size %u < %u segment offset)\n", + mpl->name, *mbp_buf_size, + offset); + return -EINVAL; + } + + ptype_cnt = rte_eth_buffer_split_get_supported_hdr_ptypes(port_id, NULL, 0); + if (ptype_cnt <= 0) { + RTE_ETHDEV_LOG(ERR, + "Port %u failed to supported buffer split header protocols\n", + port_id); + return -EINVAL; + } + + ptypes = malloc(sizeof(uint32_t) * ptype_cnt); + if (ptypes == NULL) + return -ENOMEM; + + ptype_cnt = rte_eth_buffer_split_get_supported_hdr_ptypes(port_id, + ptypes, ptype_cnt); + if (ptype_cnt < 0) { + RTE_ETHDEV_LOG(ERR, + "Port %u failed to supported buffer split header protocols\n", + port_id); + free(ptypes); + return -EINVAL; + } + + for (i = 0; i < ptype_cnt; i++) + if (ptypes[i] == proto_hdr) + break; + + free(ptypes); + + if (i == ptype_cnt) { + RTE_ETHDEV_LOG(ERR, + "Requested Rx split header protocols 0x%x is not supported.\n", + proto_hdr); + return -EINVAL; + } + } else { + /* Split at fixed length. */ + length = length != 0 ? length : *mbp_buf_size; + if (*mbp_buf_size < length + offset) { + RTE_ETHDEV_LOG(ERR, + "%s mbuf_data_room_size %u < %u (segment length=%u + segment offset=%u)\n", + mpl->name, *mbp_buf_size, + length + offset, length, offset); + return -EINVAL; + } } } return 0; @@ -1794,7 +1861,7 @@ rte_eth_rx_queue_setup(uint16_t port_id, uint16_t rx_queue_id, n_seg = rx_conf->rx_nseg; if (rx_conf->offloads & RTE_ETH_RX_OFFLOAD_BUFFER_SPLIT) { - ret = rte_eth_rx_queue_check_split(rx_seg, n_seg, + ret = rte_eth_rx_queue_check_split(port_id, rx_seg, n_seg, &mbp_buf_size, &dev_info); if (ret != 0) diff --git a/lib/ethdev/rte_ethdev.h b/lib/ethdev/rte_ethdev.h index c51c1f3fa0..4c9b121355 100644 --- a/lib/ethdev/rte_ethdev.h +++ b/lib/ethdev/rte_ethdev.h @@ -994,6 +994,9 @@ struct rte_eth_txmode { * specified in the first array element, the second buffer, from the * pool in the second element, and so on. * + * - The proto_hdrs in the elements define the split position of + * received packets. + * * - The offsets from the segment description elements specify * the data offset from the buffer beginning except the first mbuf. * The first segment offset is added with RTE_PKTMBUF_HEADROOM. @@ -1015,12 +1018,41 @@ struct rte_eth_txmode { * - pool from the last valid element * - the buffer size from this pool * - zero offset + * + * - Length based buffer split: + * - mp, length, offset should be configured. + * - The proto_hdr field must be 0. + * + * - Protocol header based buffer split: + * - mp, offset, proto_hdr should be configured. + * - The length field must be 0. + * - The proto_hdr field in the last segment should be 0. + * + * - For Protocol header based buffer split, if the received packets + * don't exactly match all protocol headers in the elements, packets + * will not be split. + * These packets will be put into: + * - pool from the last valid element + * - the buffer size from this pool + * - zero offset */ struct rte_eth_rxseg_split { struct rte_mempool *mp; /**< Memory pool to allocate segment from. */ uint16_t length; /**< Segment data length, configures split point. */ uint16_t offset; /**< Data offset from beginning of mbuf data buffer. */ - uint32_t reserved; /**< Reserved field. */ + /** + * Proto_hdr defines a bit mask of the protocol sequence as RTE_PTYPE_*, + * configures split point. The last RTE_PTYPE* in the mask indicates the + * split position. + * + * If one protocol header is defined to split packets into two segments, + * for non-tunneling packets, the complete protocol sequence should be defined. + * For tunneling packets, for simplicity, only the tunnel and inner part of + * comple protocol sequence is required. + * If several protocol headers are defined to split packets into multi-segments, + * the repeated parts of adjacent segments should be omitted. + */ + uint32_t proto_hdr; }; /** -- 2.25.1