--- /dev/null
+// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
+/*
+ * This file is open source software, licensed to you under the terms
+ * of the Apache License, Version 2.0 (the "License"). See the NOTICE file
+ * distributed with this work for additional information regarding copyright
+ * ownership. You may not use this file except in compliance with the License.
+ *
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied. See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+/*
+ * Copyright (C) 2014 Cloudius Systems, Ltd.
+ */
+/*
+ * Ceph - scalable distributed file system
+ *
+ * Copyright (C) 2015 XSky <haomai@xsky.com>
+ *
+ * Author: Haomai Wang <haomaiwang@gmail.com>
+ *
+ * This is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License version 2.1, as published by the Free Software
+ * Foundation. See file COPYING.
+ *
+ */
+
+#include <atomic>
+#include <vector>
+#include <queue>
+
+#include <rte_config.h>
+#include <rte_common.h>
+#include <rte_eal.h>
+#include <rte_pci.h>
+#include <rte_ethdev.h>
+#include <rte_cycles.h>
+#include <rte_memzone.h>
+
+#include "include/page.h"
+#include "align.h"
+#include "IP.h"
+#include "const.h"
+#include "dpdk_rte.h"
+#include "DPDK.h"
+#include "toeplitz.h"
+
+#include "common/Cycles.h"
+#include "common/dout.h"
+#include "common/errno.h"
+#include "include/assert.h"
+
+#define dout_subsys ceph_subsys_dpdk
+#undef dout_prefix
+#define dout_prefix *_dout << "dpdk "
+
+
+void* as_cookie(struct rte_pktmbuf_pool_private& p) {
+ return &p;
+};
+
+#ifndef MARKER
+typedef void *MARKER[0]; /**< generic marker for a point in a structure */
+#endif
+
+/******************* Net device related constatns *****************************/
+static constexpr uint16_t default_ring_size = 512;
+
+//
+// We need 2 times the ring size of buffers because of the way PMDs
+// refill the ring.
+//
+static constexpr uint16_t mbufs_per_queue_rx = 2 * default_ring_size;
+static constexpr uint16_t rx_gc_thresh = 64;
+
+//
+// No need to keep more descriptors in the air than can be sent in a single
+// rte_eth_tx_burst() call.
+//
+static constexpr uint16_t mbufs_per_queue_tx = 2 * default_ring_size;
+
+static constexpr uint16_t mbuf_cache_size = 512;
+static constexpr uint16_t mbuf_overhead =
+sizeof(struct rte_mbuf) + RTE_PKTMBUF_HEADROOM;
+//
+// We'll allocate 2K data buffers for an inline case because this would require
+// a single page per mbuf. If we used 4K data buffers here it would require 2
+// pages for a single buffer (due to "mbuf_overhead") and this is a much more
+// demanding memory constraint.
+//
+static constexpr size_t inline_mbuf_data_size = 2048;
+
+//
+// Size of the data buffer in the non-inline case.
+//
+// We may want to change (increase) this value in future, while the
+// inline_mbuf_data_size value will unlikely change due to reasons described
+// above.
+//
+static constexpr size_t mbuf_data_size = 4096;
+
+// (INLINE_MBUF_DATA_SIZE(2K)*32 = 64K = Max TSO/LRO size) + 1 mbuf for headers
+static constexpr uint8_t max_frags = 32 + 1;
+
+//
+// Intel's 40G NIC HW limit for a number of fragments in an xmit segment.
+//
+// See Chapter 8.4.1 "Transmit Packet in System Memory" of the xl710 devices
+// spec. for more details.
+//
+static constexpr uint8_t i40e_max_xmit_segment_frags = 8;
+
+//
+// VMWare's virtual NIC limit for a number of fragments in an xmit segment.
+//
+// see drivers/net/vmxnet3/base/vmxnet3_defs.h VMXNET3_MAX_TXD_PER_PKT
+//
+static constexpr uint8_t vmxnet3_max_xmit_segment_frags = 16;
+
+static constexpr uint16_t inline_mbuf_size = inline_mbuf_data_size + mbuf_overhead;
+
+static size_t huge_page_size = 512 * CEPH_PAGE_SIZE;
+
+uint32_t qp_mempool_obj_size()
+{
+ uint32_t mp_size = 0;
+ struct rte_mempool_objsz mp_obj_sz = {};
+
+ //
+ // We will align each size to huge page size because DPDK allocates
+ // physically contiguous memory region for each pool object.
+ //
+
+ // Rx
+ mp_size += align_up(rte_mempool_calc_obj_size(mbuf_overhead, 0, &mp_obj_sz)+
+ sizeof(struct rte_pktmbuf_pool_private),
+ huge_page_size);
+
+ //Tx
+ std::memset(&mp_obj_sz, 0, sizeof(mp_obj_sz));
+ mp_size += align_up(rte_mempool_calc_obj_size(inline_mbuf_size, 0,
+ &mp_obj_sz)+
+ sizeof(struct rte_pktmbuf_pool_private),
+ huge_page_size);
+ return mp_size;
+}
+
+static constexpr const char* pktmbuf_pool_name = "dpdk_net_pktmbuf_pool";
+
+/*
+ * When doing reads from the NIC queues, use this batch size
+ */
+static constexpr uint8_t packet_read_size = 32;
+/******************************************************************************/
+
+int DPDKDevice::init_port_start()
+{
+ assert(_port_idx < rte_eth_dev_count());
+
+ rte_eth_dev_info_get(_port_idx, &_dev_info);
+
+ //
+ // This is a workaround for a missing handling of a HW limitation in the
+ // DPDK i40e driver. This and all related to _is_i40e_device code should be
+ // removed once this handling is added.
+ //
+ if (std::string("rte_i40evf_pmd") == _dev_info.driver_name ||
+ std::string("rte_i40e_pmd") == _dev_info.driver_name) {
+ ldout(cct, 1) << __func__ << " Device is an Intel's 40G NIC. Enabling 8 fragments hack!" << dendl;
+ _is_i40e_device = true;
+ }
+
+ if (std::string("rte_vmxnet3_pmd") == _dev_info.driver_name) {
+ ldout(cct, 1) << __func__ << " Device is a VMWare Virtual NIC. Enabling 16 fragments hack!" << dendl;
+ _is_vmxnet3_device = true;
+ }
+
+ //
+ // Another workaround: this time for a lack of number of RSS bits.
+ // ixgbe PF NICs support up to 16 RSS queues.
+ // ixgbe VF NICs support up to 4 RSS queues.
+ // i40e PF NICs support up to 64 RSS queues.
+ // i40e VF NICs support up to 16 RSS queues.
+ //
+ if (std::string("rte_ixgbe_pmd") == _dev_info.driver_name) {
+ _dev_info.max_rx_queues = std::min(_dev_info.max_rx_queues, (uint16_t)16);
+ } else if (std::string("rte_ixgbevf_pmd") == _dev_info.driver_name) {
+ _dev_info.max_rx_queues = std::min(_dev_info.max_rx_queues, (uint16_t)4);
+ } else if (std::string("rte_i40e_pmd") == _dev_info.driver_name) {
+ _dev_info.max_rx_queues = std::min(_dev_info.max_rx_queues, (uint16_t)64);
+ } else if (std::string("rte_i40evf_pmd") == _dev_info.driver_name) {
+ _dev_info.max_rx_queues = std::min(_dev_info.max_rx_queues, (uint16_t)16);
+ }
+
+ // Clear txq_flags - we want to support all available offload features
+ // except for multi-mempool and refcnt'ing which we don't need
+ _dev_info.default_txconf.txq_flags =
+ ETH_TXQ_FLAGS_NOMULTMEMP | ETH_TXQ_FLAGS_NOREFCOUNT;
+
+ //
+ // Disable features that are not supported by port's HW
+ //
+ if (!(_dev_info.tx_offload_capa & DEV_TX_OFFLOAD_UDP_CKSUM)) {
+ _dev_info.default_txconf.txq_flags |= ETH_TXQ_FLAGS_NOXSUMUDP;
+ }
+
+ if (!(_dev_info.tx_offload_capa & DEV_TX_OFFLOAD_TCP_CKSUM)) {
+ _dev_info.default_txconf.txq_flags |= ETH_TXQ_FLAGS_NOXSUMTCP;
+ }
+
+ if (!(_dev_info.tx_offload_capa & DEV_TX_OFFLOAD_SCTP_CKSUM)) {
+ _dev_info.default_txconf.txq_flags |= ETH_TXQ_FLAGS_NOXSUMSCTP;
+ }
+
+ if (!(_dev_info.tx_offload_capa & DEV_TX_OFFLOAD_VLAN_INSERT)) {
+ _dev_info.default_txconf.txq_flags |= ETH_TXQ_FLAGS_NOVLANOFFL;
+ }
+
+ if (!(_dev_info.tx_offload_capa & DEV_TX_OFFLOAD_VLAN_INSERT)) {
+ _dev_info.default_txconf.txq_flags |= ETH_TXQ_FLAGS_NOVLANOFFL;
+ }
+
+ if (!(_dev_info.tx_offload_capa & DEV_TX_OFFLOAD_TCP_TSO)) {
+ _dev_info.default_txconf.txq_flags |= ETH_TXQ_FLAGS_NOMULTSEGS;
+ }
+
+ /* for port configuration all features are off by default */
+ rte_eth_conf port_conf = { 0 };
+
+ ldout(cct, 5) << __func__ << " Port " << int(_port_idx) << ": max_rx_queues "
+ << _dev_info.max_rx_queues << " max_tx_queues "
+ << _dev_info.max_tx_queues << dendl;
+
+ _num_queues = std::min({_num_queues, _dev_info.max_rx_queues, _dev_info.max_tx_queues});
+
+ ldout(cct, 5) << __func__ << " Port " << int(_port_idx) << ": using "
+ << _num_queues << " queues" << dendl;;
+
+ // Set RSS mode: enable RSS if seastar is configured with more than 1 CPU.
+ // Even if port has a single queue we still want the RSS feature to be
+ // available in order to make HW calculate RSS hash for us.
+ if (_num_queues > 1) {
+ if (_dev_info.hash_key_size == 40) {
+ _rss_key = default_rsskey_40bytes;
+ } else if (_dev_info.hash_key_size == 52) {
+ _rss_key = default_rsskey_52bytes;
+ } else if (_dev_info.hash_key_size != 0) {
+ // WTF?!!
+ rte_exit(EXIT_FAILURE,
+ "Port %d: We support only 40 or 52 bytes RSS hash keys, %d bytes key requested",
+ _port_idx, _dev_info.hash_key_size);
+ } else {
+ _rss_key = default_rsskey_40bytes;
+ _dev_info.hash_key_size = 40;
+ }
+
+ port_conf.rxmode.mq_mode = ETH_MQ_RX_RSS;
+ port_conf.rx_adv_conf.rss_conf.rss_hf = ETH_RSS_PROTO_MASK;
+ if (_dev_info.hash_key_size) {
+ port_conf.rx_adv_conf.rss_conf.rss_key = const_cast<uint8_t *>(_rss_key.data());
+ port_conf.rx_adv_conf.rss_conf.rss_key_len = _dev_info.hash_key_size;
+ }
+ } else {
+ port_conf.rxmode.mq_mode = ETH_MQ_RX_NONE;
+ }
+
+ if (_num_queues > 1) {
+ if (_dev_info.reta_size) {
+ // RETA size should be a power of 2
+ assert((_dev_info.reta_size & (_dev_info.reta_size - 1)) == 0);
+
+ // Set the RSS table to the correct size
+ _redir_table.resize(_dev_info.reta_size);
+ _rss_table_bits = std::lround(std::log2(_dev_info.reta_size));
+ ldout(cct, 5) << __func__ << " Port " << int(_port_idx)
+ << ": RSS table size is " << _dev_info.reta_size << dendl;
+ } else {
+ // FIXME: same with sw_reta
+ _redir_table.resize(128);
+ _rss_table_bits = std::lround(std::log2(128));
+ }
+ } else {
+ _redir_table.push_back(0);
+ }
+
+ // Set Rx VLAN stripping
+ if (_dev_info.rx_offload_capa & DEV_RX_OFFLOAD_VLAN_STRIP) {
+ port_conf.rxmode.hw_vlan_strip = 1;
+ }
+
+ // Enable HW CRC stripping
+ port_conf.rxmode.hw_strip_crc = 1;
+
+#ifdef RTE_ETHDEV_HAS_LRO_SUPPORT
+ // Enable LRO
+ if (_use_lro && (_dev_info.rx_offload_capa & DEV_RX_OFFLOAD_TCP_LRO)) {
+ ldout(cct, 1) << __func__ << " LRO is on" << dendl;
+ port_conf.rxmode.enable_lro = 1;
+ _hw_features.rx_lro = true;
+ } else
+#endif
+ ldout(cct, 1) << __func__ << " LRO is off" << dendl;
+
+ // Check that all CSUM features are either all set all together or not set
+ // all together. If this assumption breaks we need to rework the below logic
+ // by splitting the csum offload feature bit into separate bits for IPv4,
+ // TCP.
+ assert(((_dev_info.rx_offload_capa & DEV_RX_OFFLOAD_IPV4_CKSUM) &&
+ (_dev_info.rx_offload_capa & DEV_RX_OFFLOAD_TCP_CKSUM)) ||
+ (!(_dev_info.rx_offload_capa & DEV_RX_OFFLOAD_IPV4_CKSUM) &&
+ !(_dev_info.rx_offload_capa & DEV_RX_OFFLOAD_TCP_CKSUM)));
+
+ // Set Rx checksum checking
+ if ((_dev_info.rx_offload_capa & DEV_RX_OFFLOAD_IPV4_CKSUM) &&
+ (_dev_info.rx_offload_capa & DEV_RX_OFFLOAD_TCP_CKSUM)) {
+ ldout(cct, 1) << __func__ << " RX checksum offload supported" << dendl;
+ port_conf.rxmode.hw_ip_checksum = 1;
+ _hw_features.rx_csum_offload = 1;
+ }
+
+ if ((_dev_info.tx_offload_capa & DEV_TX_OFFLOAD_IPV4_CKSUM)) {
+ ldout(cct, 1) << __func__ << " TX ip checksum offload supported" << dendl;
+ _hw_features.tx_csum_ip_offload = 1;
+ }
+
+ // TSO is supported starting from DPDK v1.8
+ if (_dev_info.tx_offload_capa & DEV_TX_OFFLOAD_TCP_TSO) {
+ ldout(cct, 1) << __func__ << " TSO is supported" << dendl;
+ _hw_features.tx_tso = 1;
+ }
+
+ // Check that Tx TCP CSUM features are either all set all together
+ // or not set all together. If this assumption breaks we need to rework the
+ // below logic by splitting the csum offload feature bit into separate bits
+ // for TCP.
+ assert((_dev_info.tx_offload_capa & DEV_TX_OFFLOAD_TCP_CKSUM) ||
+ !(_dev_info.tx_offload_capa & DEV_TX_OFFLOAD_TCP_CKSUM));
+
+ if (_dev_info.tx_offload_capa & DEV_TX_OFFLOAD_TCP_CKSUM) {
+ ldout(cct, 1) << __func__ << " TX TCP checksum offload supported" << dendl;
+ _hw_features.tx_csum_l4_offload = 1;
+ }
+
+ int retval;
+
+ ldout(cct, 1) << __func__ << " Port " << int(_port_idx) << " init ... " << dendl;
+
+ /*
+ * Standard DPDK port initialisation - config port, then set up
+ * rx and tx rings.
+ */
+ if ((retval = rte_eth_dev_configure(_port_idx, _num_queues, _num_queues,
+ &port_conf)) != 0) {
+ lderr(cct) << __func__ << " failed to configure port " << (int)_port_idx
+ << " rx/tx queues " << _num_queues << " error " << cpp_strerror(retval) << dendl;
+ return retval;
+ }
+
+ //rte_eth_promiscuous_enable(port_num);
+ ldout(cct, 1) << __func__ << " done." << dendl;
+
+ return 0;
+}
+
+void DPDKDevice::set_hw_flow_control()
+{
+ // Read the port's current/default flow control settings
+ struct rte_eth_fc_conf fc_conf;
+ auto ret = rte_eth_dev_flow_ctrl_get(_port_idx, &fc_conf);
+
+ if (ret == -ENOTSUP) {
+ ldout(cct, 1) << __func__ << " port " << int(_port_idx)
+ << ": not support to get hardware flow control settings: " << ret << dendl;
+ goto not_supported;
+ }
+
+ if (ret < 0) {
+ lderr(cct) << __func__ << " port " << int(_port_idx)
+ << ": failed to get hardware flow control settings: " << ret << dendl;
+ ceph_abort();
+ }
+
+ if (_enable_fc) {
+ fc_conf.mode = RTE_FC_FULL;
+ } else {
+ fc_conf.mode = RTE_FC_NONE;
+ }
+
+ ret = rte_eth_dev_flow_ctrl_set(_port_idx, &fc_conf);
+ if (ret == -ENOTSUP) {
+ ldout(cct, 1) << __func__ << " port " << int(_port_idx)
+ << ": not support to set hardware flow control settings: " << ret << dendl;
+ goto not_supported;
+ }
+
+ if (ret < 0) {
+ lderr(cct) << __func__ << " port " << int(_port_idx)
+ << ": failed to set hardware flow control settings: " << ret << dendl;
+ ceph_abort();
+ }
+
+ ldout(cct, 1) << __func__ << " port " << int(_port_idx) << ": HW FC " << _enable_fc << dendl;
+ return;
+
+not_supported:
+ ldout(cct, 1) << __func__ << " port " << int(_port_idx) << ": changing HW FC settings is not supported" << dendl;
+}
+
+int DPDKDevice::init_port_fini()
+{
+ // Changing FC requires HW reset, so set it before the port is initialized.
+ set_hw_flow_control();
+
+ if (rte_eth_dev_start(_port_idx) != 0) {
+ lderr(cct) << __func__ << " can't start port " << _port_idx << dendl;
+ return -1;
+ }
+
+ if (_num_queues > 1) {
+ if (!rte_eth_dev_filter_supported(_port_idx, RTE_ETH_FILTER_HASH)) {
+ ldout(cct, 5) << __func__ << " Port " << _port_idx << ": HASH FILTER configuration is supported" << dendl;
+
+ // Setup HW touse the TOEPLITZ hash function as an RSS hash function
+ struct rte_eth_hash_filter_info info = {};
+
+ info.info_type = RTE_ETH_HASH_FILTER_GLOBAL_CONFIG;
+ info.info.global_conf.hash_func = RTE_ETH_HASH_FUNCTION_TOEPLITZ;
+
+ if (rte_eth_dev_filter_ctrl(_port_idx, RTE_ETH_FILTER_HASH,
+ RTE_ETH_FILTER_SET, &info) < 0) {
+ lderr(cct) << __func__ << " cannot set hash function on a port " << _port_idx << dendl;
+ return -1;
+ }
+ }
+
+ set_rss_table();
+ }
+
+ // Wait for a link
+ if (check_port_link_status() < 0) {
+ lderr(cct) << __func__ << " port link up failed " << _port_idx << dendl;
+ return -1;
+ }
+
+ ldout(cct, 5) << __func__ << " created DPDK device" << dendl;
+ return 0;
+}
+
+void DPDKQueuePair::configure_proxies(const std::map<unsigned, float>& cpu_weights) {
+ assert(!cpu_weights.empty());
+ if (cpu_weights.size() == 1 && cpu_weights.begin()->first == _qid) {
+ // special case queue sending to self only, to avoid requiring a hash value
+ return;
+ }
+ register_packet_provider([this] {
+ Tub<Packet> p;
+ if (!_proxy_packetq.empty()) {
+ p = std::move(_proxy_packetq.front());
+ _proxy_packetq.pop_front();
+ }
+ return p;
+ });
+ build_sw_reta(cpu_weights);
+}
+
+void DPDKQueuePair::build_sw_reta(const std::map<unsigned, float>& cpu_weights) {
+ float total_weight = 0;
+ for (auto&& x : cpu_weights) {
+ total_weight += x.second;
+ }
+ float accum = 0;
+ unsigned idx = 0;
+ std::array<uint8_t, 128> reta;
+ for (auto&& entry : cpu_weights) {
+ auto cpu = entry.first;
+ auto weight = entry.second;
+ accum += weight;
+ while (idx < (accum / total_weight * reta.size() - 0.5)) {
+ reta[idx++] = cpu;
+ }
+ }
+ _sw_reta = reta;
+}
+
+
+bool DPDKQueuePair::init_rx_mbuf_pool()
+{
+ std::string name = std::string(pktmbuf_pool_name) + std::to_string(_qid) + "_rx";
+
+ // reserve the memory for Rx buffers containers
+ _rx_free_pkts.reserve(mbufs_per_queue_rx);
+ _rx_free_bufs.reserve(mbufs_per_queue_rx);
+
+ _pktmbuf_pool_rx = rte_mempool_lookup(name.c_str());
+ if (!_pktmbuf_pool_rx) {
+ ldout(cct, 1) << __func__ << " Creating Rx mbuf pool '" << name.c_str()
+ << "' [" << mbufs_per_queue_rx << " mbufs] ..."<< dendl;
+
+ //
+ // Don't pass single-producer/single-consumer flags to mbuf create as it
+ // seems faster to use a cache instead.
+ //
+ struct rte_pktmbuf_pool_private roomsz = {};
+ roomsz.mbuf_data_room_size = mbuf_data_size + RTE_PKTMBUF_HEADROOM;
+ _pktmbuf_pool_rx = rte_mempool_create(
+ name.c_str(),
+ mbufs_per_queue_rx, mbuf_overhead,
+ mbuf_cache_size,
+ sizeof(struct rte_pktmbuf_pool_private),
+ rte_pktmbuf_pool_init, as_cookie(roomsz),
+ rte_pktmbuf_init, nullptr,
+ rte_socket_id(), 0);
+ if (!_pktmbuf_pool_rx) {
+ lderr(cct) << __func__ << " Failed to create mempool for rx" << dendl;
+ return false;
+ }
+
+ //
+ // 1) Pull all entries from the pool.
+ // 2) Bind data buffers to each of them.
+ // 3) Return them back to the pool.
+ //
+ for (int i = 0; i < mbufs_per_queue_rx; i++) {
+ rte_mbuf* m = rte_pktmbuf_alloc(_pktmbuf_pool_rx);
+ assert(m);
+ _rx_free_bufs.push_back(m);
+ }
+
+ for (int i = 0; i < cct->_conf->ms_dpdk_rx_buffer_count_per_core; i++) {
+ void* m = rte_malloc(NULL, mbuf_data_size, mbuf_data_size);
+ assert(m);
+ _alloc_bufs.push_back(m);
+ }
+
+ for (auto&& m : _rx_free_bufs) {
+ if (!init_noninline_rx_mbuf(m, mbuf_data_size, _alloc_bufs)) {
+ lderr(cct) << __func__ << " Failed to allocate data buffers for Rx ring. "
+ "Consider increasing the amount of memory." << dendl;
+ return false;
+ }
+ }
+
+ rte_mempool_put_bulk(_pktmbuf_pool_rx, (void**)_rx_free_bufs.data(),
+ _rx_free_bufs.size());
+
+ _rx_free_bufs.clear();
+ if (rte_eth_rx_queue_setup(_dev_port_idx, _qid, default_ring_size,
+ rte_eth_dev_socket_id(_dev_port_idx),
+ _dev->def_rx_conf(), _pktmbuf_pool_rx) < 0) {
+ lderr(cct) << __func__ << " cannot initialize rx queue" << dendl;
+ return false;
+ }
+ }
+
+ ldout(cct, 20) << __func__ << " count " << rte_mempool_count(_pktmbuf_pool_rx) << " free count " << rte_mempool_free_count(_pktmbuf_pool_rx) << dendl;
+ return _pktmbuf_pool_rx != nullptr;
+}
+
+int DPDKDevice::check_port_link_status()
+{
+ int count = 0;
+
+ ldout(cct, 20) << __func__ << dendl;
+ const int sleep_time = 100 * 1000;
+ const int max_check_time = 90; /* 9s (90 * 100ms) in total */
+ while (true) {
+ struct rte_eth_link link;
+ memset(&link, 0, sizeof(link));
+ rte_eth_link_get_nowait(_port_idx, &link);
+
+ if (true) {
+ if (link.link_status) {
+ ldout(cct, 5) << __func__ << " done port "
+ << static_cast<unsigned>(_port_idx)
+ << " link Up - speed " << link.link_speed
+ << " Mbps - "
+ << ((link.link_duplex == ETH_LINK_FULL_DUPLEX) ? ("full-duplex") : ("half-duplex\n"))
+ << dendl;
+ break;
+ } else if (count++ < max_check_time) {
+ ldout(cct, 20) << __func__ << " not ready, continue to wait." << dendl;
+ usleep(sleep_time);
+ } else {
+ lderr(cct) << __func__ << "done port " << _port_idx << " link down" << dendl;
+ return -1;
+ }
+ }
+ }
+ return 0;
+}
+
+class C_handle_dev_stats : public EventCallback {
+ DPDKQueuePair *_qp;
+ public:
+ C_handle_dev_stats(DPDKQueuePair *qp): _qp(qp) { }
+ void do_request(int id) {
+ _qp->handle_stats();
+ }
+};
+
+DPDKQueuePair::DPDKQueuePair(CephContext *c, EventCenter *cen, DPDKDevice* dev, uint8_t qid)
+ : cct(c), _dev(dev), _dev_port_idx(dev->port_idx()), center(cen), _qid(qid),
+ _tx_poller(this), _rx_gc_poller(this), _tx_buf_factory(c, dev, qid),
+ _tx_gc_poller(this)
+{
+ if (!init_rx_mbuf_pool()) {
+ lderr(cct) << __func__ << " cannot initialize mbuf pools" << dendl;
+ ceph_abort();
+ }
+
+ static_assert(offsetof(tx_buf, private_end) -
+ offsetof(tx_buf, private_start) <= RTE_PKTMBUF_HEADROOM,
+ "RTE_PKTMBUF_HEADROOM is less than DPDKQueuePair::tx_buf size! "
+ "Increase the headroom size in the DPDK configuration");
+ static_assert(offsetof(tx_buf, _mbuf) == 0,
+ "There is a pad at the beginning of the tx_buf before _mbuf "
+ "field!");
+ static_assert((inline_mbuf_data_size & (inline_mbuf_data_size - 1)) == 0,
+ "inline_mbuf_data_size has to be a power of two!");
+
+ std::string name(std::string("queue") + std::to_string(qid));
+ PerfCountersBuilder plb(cct, name, l_dpdk_qp_first, l_dpdk_qp_last);
+
+ plb.add_u64_counter(l_dpdk_qp_rx_packets, "dpdk_receive_packets", "DPDK received packets");
+ plb.add_u64_counter(l_dpdk_qp_tx_packets, "dpdk_send_packets", "DPDK sendd packets");
+ plb.add_u64_counter(l_dpdk_qp_rx_bad_checksum_errors, "dpdk_receive_bad_checksum_errors", "DPDK received bad checksum packets");
+ plb.add_u64_counter(l_dpdk_qp_rx_no_memory_errors, "dpdk_receive_no_memory_errors", "DPDK received no memory packets");
+ plb.add_u64_counter(l_dpdk_qp_rx_bytes, "dpdk_receive_bytes", "DPDK received bytes");
+ plb.add_u64_counter(l_dpdk_qp_tx_bytes, "dpdk_send_bytes", "DPDK sendd bytes");
+ plb.add_u64_counter(l_dpdk_qp_rx_last_bunch, "dpdk_receive_last_bunch", "DPDK last received bunch");
+ plb.add_u64_counter(l_dpdk_qp_tx_last_bunch, "dpdk_send_last_bunch", "DPDK last send bunch");
+ plb.add_u64_counter(l_dpdk_qp_rx_fragments, "dpdk_receive_fragments", "DPDK received total fragments");
+ plb.add_u64_counter(l_dpdk_qp_tx_fragments, "dpdk_send_fragments", "DPDK sendd total fragments");
+ plb.add_u64_counter(l_dpdk_qp_rx_copy_ops, "dpdk_receive_copy_ops", "DPDK received copy operations");
+ plb.add_u64_counter(l_dpdk_qp_tx_copy_ops, "dpdk_send_copy_ops", "DPDK sendd copy operations");
+ plb.add_u64_counter(l_dpdk_qp_rx_copy_bytes, "dpdk_receive_copy_bytes", "DPDK received copy bytes");
+ plb.add_u64_counter(l_dpdk_qp_tx_copy_bytes, "dpdk_send_copy_bytes", "DPDK send copy bytes");
+ plb.add_u64_counter(l_dpdk_qp_rx_linearize_ops, "dpdk_receive_linearize_ops", "DPDK received linearize operations");
+ plb.add_u64_counter(l_dpdk_qp_tx_linearize_ops, "dpdk_send_linearize_ops", "DPDK send linearize operations");
+ plb.add_u64_counter(l_dpdk_qp_tx_queue_length, "dpdk_send_queue_length", "DPDK send queue length");
+
+ perf_logger = plb.create_perf_counters();
+ cct->get_perfcounters_collection()->add(perf_logger);
+
+ if (!_qid)
+ device_stat_time_fd = center->create_time_event(1000*1000, new C_handle_dev_stats(this));
+}
+
+void DPDKQueuePair::handle_stats()
+{
+ ldout(cct, 20) << __func__ << " started." << dendl;
+ rte_eth_stats rte_stats = {};
+ int rc = rte_eth_stats_get(_dev_port_idx, &rte_stats);
+
+ if (rc) {
+ ldout(cct, 0) << __func__ << " failed to get port statistics: " << cpp_strerror(rc) << dendl;
+ return ;
+ }
+
+#if RTE_VERSION < RTE_VERSION_NUM(16,7,0,0)
+ _dev->perf_logger->set(l_dpdk_dev_rx_mcast, rte_stats.imcasts);
+ _dev->perf_logger->set(l_dpdk_dev_rx_badcrc_errors, rte_stats.ibadcrc);
+#endif
+ _dev->perf_logger->set(l_dpdk_dev_rx_dropped_errors, rte_stats.imissed);
+ _dev->perf_logger->set(l_dpdk_dev_rx_nombuf_errors, rte_stats.rx_nombuf);
+
+ _dev->perf_logger->set(l_dpdk_dev_rx_total_errors, rte_stats.ierrors);
+ _dev->perf_logger->set(l_dpdk_dev_tx_total_errors, rte_stats.oerrors);
+ device_stat_time_fd = center->create_time_event(1000*1000, new C_handle_dev_stats(this));
+}
+
+bool DPDKQueuePair::poll_tx() {
+ bool nonloopback = !cct->_conf->ms_dpdk_debug_allow_loopback;
+#ifdef CEPH_PERF_DEV
+ uint64_t start = Cycles::rdtsc();
+#endif
+ uint32_t total_work = 0;
+ if (_tx_packetq.size() < 16) {
+ // refill send queue from upper layers
+ uint32_t work;
+ do {
+ work = 0;
+ for (auto&& pr : _pkt_providers) {
+ auto p = pr();
+ if (p) {
+ work++;
+ if (likely(nonloopback)) {
+ // ldout(cct, 0) << __func__ << " len: " << p->len() << " frags: " << p->nr_frags() << dendl;
+ _tx_packetq.push_back(std::move(*p));
+ } else {
+ auto th = p->get_header<eth_hdr>(0);
+ if (th->dst_mac == th->src_mac) {
+ _dev->l2receive(_qid, std::move(*p));
+ } else {
+ _tx_packetq.push_back(std::move(*p));
+ }
+ }
+ if (_tx_packetq.size() == 128) {
+ break;
+ }
+ }
+ }
+ total_work += work;
+ } while (work && total_work < 256 && _tx_packetq.size() < 128);
+ }
+ if (!_tx_packetq.empty()) {
+ uint64_t c = send(_tx_packetq);
+ perf_logger->inc(l_dpdk_qp_tx_packets, c);
+ perf_logger->set(l_dpdk_qp_tx_last_bunch, c);
+#ifdef CEPH_PERF_DEV
+ tx_count += total_work;
+ tx_cycles += Cycles::rdtsc() - start;
+#endif
+ return true;
+ }
+
+ return false;
+}
+
+inline Tub<Packet> DPDKQueuePair::from_mbuf_lro(rte_mbuf* m)
+{
+ _frags.clear();
+ _bufs.clear();
+
+ for (; m != nullptr; m = m->next) {
+ char* data = rte_pktmbuf_mtod(m, char*);
+
+ _frags.emplace_back(fragment{data, rte_pktmbuf_data_len(m)});
+ _bufs.push_back(data);
+ }
+
+ auto del = std::bind(
+ [this](std::vector<char*> &bufs) {
+ for (auto&& b : bufs) { _alloc_bufs.push_back(b); }
+ }, std::move(_bufs));
+ return Packet(
+ _frags.begin(), _frags.end(), make_deleter(std::move(del)));
+}
+
+inline Tub<Packet> DPDKQueuePair::from_mbuf(rte_mbuf* m)
+{
+ _rx_free_pkts.push_back(m);
+ _num_rx_free_segs += m->nb_segs;
+
+ if (!_dev->hw_features_ref().rx_lro || rte_pktmbuf_is_contiguous(m)) {
+ char* data = rte_pktmbuf_mtod(m, char*);
+
+ return Packet(fragment{data, rte_pktmbuf_data_len(m)},
+ make_deleter([this, data] { _alloc_bufs.push_back(data); }));
+ } else {
+ return from_mbuf_lro(m);
+ }
+}
+
+inline bool DPDKQueuePair::refill_one_cluster(rte_mbuf* head)
+{
+ for (; head != nullptr; head = head->next) {
+ if (!refill_rx_mbuf(head, mbuf_data_size, _alloc_bufs)) {
+ //
+ // If we failed to allocate a new buffer - push the rest of the
+ // cluster back to the free_packets list for a later retry.
+ //
+ _rx_free_pkts.push_back(head);
+ return false;
+ }
+ _rx_free_bufs.push_back(head);
+ }
+
+ return true;
+}
+
+bool DPDKQueuePair::rx_gc(bool force)
+{
+ if (_num_rx_free_segs >= rx_gc_thresh || force) {
+ ldout(cct, 10) << __func__ << " free segs " << _num_rx_free_segs
+ << " thresh " << rx_gc_thresh
+ << " free pkts " << _rx_free_pkts.size()
+ << " pool count " << rte_mempool_count(_pktmbuf_pool_rx)
+ << " free pool count " << rte_mempool_free_count(_pktmbuf_pool_rx)
+ << dendl;
+
+ while (!_rx_free_pkts.empty()) {
+ //
+ // Use back() + pop_back() semantics to avoid an extra
+ // _rx_free_pkts.clear() at the end of the function - clear() has a
+ // linear complexity.
+ //
+ auto m = _rx_free_pkts.back();
+ _rx_free_pkts.pop_back();
+
+ if (!refill_one_cluster(m)) {
+ ldout(cct, 1) << __func__ << " get new mbuf failed " << dendl;
+ break;
+ }
+ }
+
+ if (_rx_free_bufs.size()) {
+ rte_mempool_put_bulk(_pktmbuf_pool_rx,
+ (void **)_rx_free_bufs.data(),
+ _rx_free_bufs.size());
+
+ // TODO: assert() in a fast path! Remove me ASAP!
+ assert(_num_rx_free_segs >= _rx_free_bufs.size());
+
+ _num_rx_free_segs -= _rx_free_bufs.size();
+ _rx_free_bufs.clear();
+
+ // TODO: assert() in a fast path! Remove me ASAP!
+ assert((_rx_free_pkts.empty() && !_num_rx_free_segs) ||
+ (!_rx_free_pkts.empty() && _num_rx_free_segs));
+ }
+ }
+
+ return _num_rx_free_segs >= rx_gc_thresh;
+}
+
+
+void DPDKQueuePair::process_packets(
+ struct rte_mbuf **bufs, uint16_t count)
+{
+ uint64_t nr_frags = 0, bytes = 0;
+
+ for (uint16_t i = 0; i < count; i++) {
+ struct rte_mbuf *m = bufs[i];
+ offload_info oi;
+
+ Tub<Packet> p = from_mbuf(m);
+
+ // Drop the packet if translation above has failed
+ if (!p) {
+ perf_logger->inc(l_dpdk_qp_rx_no_memory_errors);
+ continue;
+ }
+ // ldout(cct, 0) << __func__ << " len " << p->len() << " " << dendl;
+
+ nr_frags += m->nb_segs;
+ bytes += m->pkt_len;
+
+ // Set stipped VLAN value if available
+ if ((_dev->_dev_info.rx_offload_capa & DEV_RX_OFFLOAD_VLAN_STRIP) &&
+ (m->ol_flags & PKT_RX_VLAN_PKT)) {
+ oi.vlan_tci = m->vlan_tci;
+ }
+
+ if (_dev->get_hw_features().rx_csum_offload) {
+ if (m->ol_flags & (PKT_RX_IP_CKSUM_BAD | PKT_RX_L4_CKSUM_BAD)) {
+ // Packet with bad checksum, just drop it.
+ perf_logger->inc(l_dpdk_qp_rx_bad_checksum_errors);
+ continue;
+ }
+ // Note that when _hw_features.rx_csum_offload is on, the receive
+ // code for ip, tcp and udp will assume they don't need to check
+ // the checksum again, because we did this here.
+ }
+
+ p->set_offload_info(oi);
+ if (m->ol_flags & PKT_RX_RSS_HASH) {
+ p->set_rss_hash(m->hash.rss);
+ }
+
+ _dev->l2receive(_qid, std::move(*p));
+ }
+
+ perf_logger->inc(l_dpdk_qp_rx_packets, count);
+ perf_logger->set(l_dpdk_qp_rx_last_bunch, count);
+ perf_logger->inc(l_dpdk_qp_rx_fragments, nr_frags);
+ perf_logger->inc(l_dpdk_qp_rx_bytes, bytes);
+}
+
+bool DPDKQueuePair::poll_rx_once()
+{
+ struct rte_mbuf *buf[packet_read_size];
+
+ /* read a port */
+#ifdef CEPH_PERF_DEV
+ uint64_t start = Cycles::rdtsc();
+#endif
+ uint16_t count = rte_eth_rx_burst(_dev_port_idx, _qid,
+ buf, packet_read_size);
+
+ /* Now process the NIC packets read */
+ if (likely(count > 0)) {
+ process_packets(buf, count);
+#ifdef CEPH_PERF_DEV
+ rx_cycles = Cycles::rdtsc() - start;
+ rx_count += count;
+#endif
+ }
+#ifdef CEPH_PERF_DEV
+ else {
+ if (rx_count > 10000 && tx_count) {
+ ldout(cct, 0) << __func__ << " rx count=" << rx_count << " avg rx=" << Cycles::to_nanoseconds(rx_cycles)/rx_count << "ns "
+ << " tx count=" << tx_count << " avg tx=" << Cycles::to_nanoseconds(tx_cycles)/tx_count << "ns"
+ << dendl;
+ rx_count = rx_cycles = tx_count = tx_cycles = 0;
+ }
+ }
+#endif
+
+ return count;
+}
+
+DPDKQueuePair::tx_buf_factory::tx_buf_factory(CephContext *c,
+ DPDKDevice *dev, uint8_t qid): cct(c)
+{
+ std::string name = std::string(pktmbuf_pool_name) + std::to_string(qid) + "_tx";
+
+ _pool = rte_mempool_lookup(name.c_str());
+ if (!_pool) {
+ ldout(cct, 0) << __func__ << " Creating Tx mbuf pool '" << name.c_str()
+ << "' [" << mbufs_per_queue_tx << " mbufs] ..." << dendl;
+ //
+ // We are going to push the buffers from the mempool into
+ // the circular_buffer and then poll them from there anyway, so
+ // we prefer to make a mempool non-atomic in this case.
+ //
+ _pool = rte_mempool_create(name.c_str(),
+ mbufs_per_queue_tx, inline_mbuf_size,
+ mbuf_cache_size,
+ sizeof(struct rte_pktmbuf_pool_private),
+ rte_pktmbuf_pool_init, nullptr,
+ rte_pktmbuf_init, nullptr,
+ rte_socket_id(), 0);
+
+ if (!_pool) {
+ lderr(cct) << __func__ << " Failed to create mempool for Tx" << dendl;
+ ceph_abort();
+ }
+ if (rte_eth_tx_queue_setup(dev->port_idx(), qid, default_ring_size,
+ rte_eth_dev_socket_id(dev->port_idx()),
+ dev->def_tx_conf()) < 0) {
+ lderr(cct) << __func__ << " cannot initialize tx queue" << dendl;
+ ceph_abort();
+ }
+ }
+
+ //
+ // Fill the factory with the buffers from the mempool allocated
+ // above.
+ //
+ init_factory();
+}
+
+bool DPDKQueuePair::tx_buf::i40e_should_linearize(rte_mbuf *head)
+{
+ bool is_tso = head->ol_flags & PKT_TX_TCP_SEG;
+
+ // For a non-TSO case: number of fragments should not exceed 8
+ if (!is_tso){
+ return head->nb_segs > i40e_max_xmit_segment_frags;
+ }
+
+ //
+ // For a TSO case each MSS window should not include more than 8
+ // fragments including headers.
+ //
+
+ // Calculate the number of frags containing headers.
+ //
+ // Note: we support neither VLAN nor tunneling thus headers size
+ // accounting is super simple.
+ //
+ size_t headers_size = head->l2_len + head->l3_len + head->l4_len;
+ unsigned hdr_frags = 0;
+ size_t cur_payload_len = 0;
+ rte_mbuf *cur_seg = head;
+
+ while (cur_seg && cur_payload_len < headers_size) {
+ cur_payload_len += cur_seg->data_len;
+ cur_seg = cur_seg->next;
+ hdr_frags++;
+ }
+
+ //
+ // Header fragments will be used for each TSO segment, thus the
+ // maximum number of data segments will be 8 minus the number of
+ // header fragments.
+ //
+ // It's unclear from the spec how the first TSO segment is treated
+ // if the last fragment with headers contains some data bytes:
+ // whether this fragment will be accounted as a single fragment or
+ // as two separate fragments. We prefer to play it safe and assume
+ // that this fragment will be accounted as two separate fragments.
+ //
+ size_t max_win_size = i40e_max_xmit_segment_frags - hdr_frags;
+
+ if (head->nb_segs <= max_win_size) {
+ return false;
+ }
+
+ // Get the data (without headers) part of the first data fragment
+ size_t prev_frag_data = cur_payload_len - headers_size;
+ auto mss = head->tso_segsz;
+
+ while (cur_seg) {
+ unsigned frags_in_seg = 0;
+ size_t cur_seg_size = 0;
+
+ if (prev_frag_data) {
+ cur_seg_size = prev_frag_data;
+ frags_in_seg++;
+ prev_frag_data = 0;
+ }
+
+ while (cur_seg_size < mss && cur_seg) {
+ cur_seg_size += cur_seg->data_len;
+ cur_seg = cur_seg->next;
+ frags_in_seg++;
+
+ if (frags_in_seg > max_win_size) {
+ return true;
+ }
+ }
+
+ if (cur_seg_size > mss) {
+ prev_frag_data = cur_seg_size - mss;
+ }
+ }
+
+ return false;
+}
+
+void DPDKQueuePair::tx_buf::set_cluster_offload_info(const Packet& p, const DPDKQueuePair& qp, rte_mbuf* head)
+{
+ // Handle TCP checksum offload
+ auto oi = p.offload_info();
+ if (oi.needs_ip_csum) {
+ head->ol_flags |= PKT_TX_IP_CKSUM;
+ // TODO: Take a VLAN header into an account here
+ head->l2_len = sizeof(struct ether_hdr);
+ head->l3_len = oi.ip_hdr_len;
+ }
+ if (qp.port().get_hw_features().tx_csum_l4_offload) {
+ if (oi.protocol == ip_protocol_num::tcp) {
+ head->ol_flags |= PKT_TX_TCP_CKSUM;
+ // TODO: Take a VLAN header into an account here
+ head->l2_len = sizeof(struct ether_hdr);
+ head->l3_len = oi.ip_hdr_len;
+
+ if (oi.tso_seg_size) {
+ assert(oi.needs_ip_csum);
+ head->ol_flags |= PKT_TX_TCP_SEG;
+ head->l4_len = oi.tcp_hdr_len;
+ head->tso_segsz = oi.tso_seg_size;
+ }
+ }
+ }
+}
+
+DPDKQueuePair::tx_buf* DPDKQueuePair::tx_buf::from_packet_zc(
+ CephContext *cct, Packet&& p, DPDKQueuePair& qp)
+{
+ // Too fragmented - linearize
+ if (p.nr_frags() > max_frags) {
+ p.linearize();
+ qp.perf_logger->inc(l_dpdk_qp_tx_linearize_ops);
+ }
+
+ build_mbuf_cluster:
+ rte_mbuf *head = nullptr, *last_seg = nullptr;
+ unsigned nsegs = 0;
+
+ //
+ // Create a HEAD of the fragmented packet: check if frag0 has to be
+ // copied and if yes - send it in a copy way
+ //
+ if (!check_frag0(p)) {
+ if (!copy_one_frag(qp, p.frag(0), head, last_seg, nsegs)) {
+ ldout(cct, 1) << __func__ << " no available mbuf for " << p.frag(0).size << dendl;
+ return nullptr;
+ }
+ } else if (!translate_one_frag(qp, p.frag(0), head, last_seg, nsegs)) {
+ ldout(cct, 1) << __func__ << " no available mbuf for " << p.frag(0).size << dendl;
+ return nullptr;
+ }
+
+ unsigned total_nsegs = nsegs;
+
+ for (unsigned i = 1; i < p.nr_frags(); i++) {
+ rte_mbuf *h = nullptr, *new_last_seg = nullptr;
+ if (!translate_one_frag(qp, p.frag(i), h, new_last_seg, nsegs)) {
+ ldout(cct, 1) << __func__ << " no available mbuf for " << p.frag(i).size << dendl;
+ me(head)->recycle();
+ return nullptr;
+ }
+
+ total_nsegs += nsegs;
+
+ // Attach a new buffers' chain to the packet chain
+ last_seg->next = h;
+ last_seg = new_last_seg;
+ }
+
+ // Update the HEAD buffer with the packet info
+ head->pkt_len = p.len();
+ head->nb_segs = total_nsegs;
+
+ set_cluster_offload_info(p, qp, head);
+
+ //
+ // If a packet hasn't been linearized already and the resulting
+ // cluster requires the linearisation due to HW limitation:
+ //
+ // - Recycle the cluster.
+ // - Linearize the packet.
+ // - Build the cluster once again
+ //
+ if (head->nb_segs > max_frags ||
+ (p.nr_frags() > 1 && qp.port().is_i40e_device() && i40e_should_linearize(head)) ||
+ (p.nr_frags() > vmxnet3_max_xmit_segment_frags && qp.port().is_vmxnet3_device())) {
+ me(head)->recycle();
+ p.linearize();
+ qp.perf_logger->inc(l_dpdk_qp_tx_linearize_ops);
+
+ goto build_mbuf_cluster;
+ }
+
+ me(last_seg)->set_packet(std::move(p));
+
+ return me(head);
+}
+
+void DPDKQueuePair::tx_buf::copy_packet_to_cluster(const Packet& p, rte_mbuf* head)
+{
+ rte_mbuf* cur_seg = head;
+ size_t cur_seg_offset = 0;
+ unsigned cur_frag_idx = 0;
+ size_t cur_frag_offset = 0;
+
+ while (true) {
+ size_t to_copy = std::min(p.frag(cur_frag_idx).size - cur_frag_offset,
+ inline_mbuf_data_size - cur_seg_offset);
+
+ memcpy(rte_pktmbuf_mtod_offset(cur_seg, void*, cur_seg_offset),
+ p.frag(cur_frag_idx).base + cur_frag_offset, to_copy);
+
+ cur_frag_offset += to_copy;
+ cur_seg_offset += to_copy;
+
+ if (cur_frag_offset >= p.frag(cur_frag_idx).size) {
+ ++cur_frag_idx;
+ if (cur_frag_idx >= p.nr_frags()) {
+ //
+ // We are done - set the data size of the last segment
+ // of the cluster.
+ //
+ cur_seg->data_len = cur_seg_offset;
+ break;
+ }
+
+ cur_frag_offset = 0;
+ }
+
+ if (cur_seg_offset >= inline_mbuf_data_size) {
+ cur_seg->data_len = inline_mbuf_data_size;
+ cur_seg = cur_seg->next;
+ cur_seg_offset = 0;
+
+ // FIXME: assert in a fast-path - remove!!!
+ assert(cur_seg);
+ }
+ }
+}
+
+DPDKQueuePair::tx_buf* DPDKQueuePair::tx_buf::from_packet_copy(Packet&& p, DPDKQueuePair& qp)
+{
+ // sanity
+ if (!p.len()) {
+ return nullptr;
+ }
+
+ /*
+ * Here we are going to use the fact that the inline data size is a
+ * power of two.
+ *
+ * We will first try to allocate the cluster and only if we are
+ * successful - we will go and copy the data.
+ */
+ auto aligned_len = align_up((size_t)p.len(), inline_mbuf_data_size);
+ unsigned nsegs = aligned_len / inline_mbuf_data_size;
+ rte_mbuf *head = nullptr, *last_seg = nullptr;
+
+ tx_buf* buf = qp.get_tx_buf();
+ if (!buf) {
+ return nullptr;
+ }
+
+ head = buf->rte_mbuf_p();
+ last_seg = head;
+ for (unsigned i = 1; i < nsegs; i++) {
+ buf = qp.get_tx_buf();
+ if (!buf) {
+ me(head)->recycle();
+ return nullptr;
+ }
+
+ last_seg->next = buf->rte_mbuf_p();
+ last_seg = last_seg->next;
+ }
+
+ //
+ // If we've got here means that we have succeeded already!
+ // We only need to copy the data and set the head buffer with the
+ // relevant info.
+ //
+ head->pkt_len = p.len();
+ head->nb_segs = nsegs;
+
+ copy_packet_to_cluster(p, head);
+ set_cluster_offload_info(p, qp, head);
+
+ return me(head);
+}
+
+size_t DPDKQueuePair::tx_buf::copy_one_data_buf(
+ DPDKQueuePair& qp, rte_mbuf*& m, char* data, size_t buf_len)
+{
+ tx_buf* buf = qp.get_tx_buf();
+ if (!buf) {
+ return 0;
+ }
+
+ size_t len = std::min(buf_len, inline_mbuf_data_size);
+
+ m = buf->rte_mbuf_p();
+
+ // mbuf_put()
+ m->data_len = len;
+ m->pkt_len = len;
+
+ qp.perf_logger->inc(l_dpdk_qp_tx_copy_ops);
+ qp.perf_logger->inc(l_dpdk_qp_tx_copy_bytes, len);
+
+ memcpy(rte_pktmbuf_mtod(m, void*), data, len);
+
+ return len;
+}
+
+void DPDKDevice::set_rss_table()
+{
+ // always fill our local indirection table.
+ unsigned i = 0;
+ for (auto& r : _redir_table) {
+ r = i++ % _num_queues;
+ }
+
+ if (_dev_info.reta_size == 0)
+ return;
+
+ int reta_conf_size = std::max(1, _dev_info.reta_size / RTE_RETA_GROUP_SIZE);
+ rte_eth_rss_reta_entry64 reta_conf[reta_conf_size];
+
+ // Configure the HW indirection table
+ i = 0;
+ for (auto& x : reta_conf) {
+ x.mask = ~0ULL;
+ for (auto& r: x.reta) {
+ r = i++ % _num_queues;
+ }
+ }
+
+ if (rte_eth_dev_rss_reta_update(_port_idx, reta_conf, _dev_info.reta_size)) {
+ rte_exit(EXIT_FAILURE, "Port %d: Failed to update an RSS indirection table", _port_idx);
+ }
+}
+
+/******************************** Interface functions *************************/
+
+std::unique_ptr<DPDKDevice> create_dpdk_net_device(
+ CephContext *cct,
+ unsigned cores,
+ uint8_t port_idx,
+ bool use_lro,
+ bool enable_fc)
+{
+ // Check that we have at least one DPDK-able port
+ if (rte_eth_dev_count() == 0) {
+ rte_exit(EXIT_FAILURE, "No Ethernet ports - bye\n");
+ } else {
+ ldout(cct, 10) << __func__ << " ports number: " << int(rte_eth_dev_count()) << dendl;
+ }
+
+ return std::unique_ptr<DPDKDevice>(
+ new DPDKDevice(cct, port_idx, cores, use_lro, enable_fc));
+}
Code Review / stor4nfv.git / blobdiff