/* * Copyright (c) 2014 Nicira, Inc. * * Licensed under the Apache License, Version 2.0 (the "License"); * 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. */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include "dirs.h" #include "dp-packet.h" #include "dpif-netdev.h" #include "list.h" #include "netdev-dpdk.h" #include "netdev-provider.h" #include "netdev-vport.h" #include "odp-util.h" #include "ofp-print.h" #include "ovs-numa.h" #include "ovs-thread.h" #include "ovs-rcu.h" #include "packets.h" #include "shash.h" #include "sset.h" #include "unaligned.h" #include "timeval.h" #include "unixctl.h" #include "openvswitch/vlog.h" #include "rte_config.h" #include "rte_mbuf.h" #include "rte_virtio_net.h" VLOG_DEFINE_THIS_MODULE(dpdk); static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(5, 20); #define DPDK_PORT_WATCHDOG_INTERVAL 5 #define OVS_CACHE_LINE_SIZE CACHE_LINE_SIZE #define OVS_VPORT_DPDK "ovs_dpdk" /* * need to reserve tons of extra space in the mbufs so we can align the * DMA addresses to 4KB. */ #define MTU_TO_MAX_LEN(mtu) ((mtu) + ETHER_HDR_LEN + ETHER_CRC_LEN) #define MBUF_SIZE(mtu) (MTU_TO_MAX_LEN(mtu) + (512) + \ sizeof(struct rte_mbuf) + RTE_PKTMBUF_HEADROOM) /* Max and min number of packets in the mempool. OVS tries to allocate a * mempool with MAX_NB_MBUF: if this fails (because the system doesn't have * enough hugepages) we keep halving the number until the allocation succeeds * or we reach MIN_NB_MBUF */ #define MAX_NB_MBUF (4096 * 64) #define MIN_NB_MBUF (4096 * 4) #define MP_CACHE_SZ RTE_MEMPOOL_CACHE_MAX_SIZE /* MAX_NB_MBUF can be divided by 2 many times, until MIN_NB_MBUF */ BUILD_ASSERT_DECL(MAX_NB_MBUF % ROUND_DOWN_POW2(MAX_NB_MBUF/MIN_NB_MBUF) == 0); /* The smallest possible NB_MBUF that we're going to try should be a multiple * of MP_CACHE_SZ. This is advised by DPDK documentation. */ BUILD_ASSERT_DECL((MAX_NB_MBUF / ROUND_DOWN_POW2(MAX_NB_MBUF/MIN_NB_MBUF)) % MP_CACHE_SZ == 0); #define SOCKET0 0 #define NIC_PORT_RX_Q_SIZE 2048 /* Size of Physical NIC RX Queue, Max (n+32<=4096)*/ #define NIC_PORT_TX_Q_SIZE 2048 /* Size of Physical NIC TX Queue, Max (n+32<=4096)*/ static char *cuse_dev_name = NULL; /* Character device cuse_dev_name. */ static char *vhost_sock_dir = NULL; /* Location of vhost-user sockets */ /* * Maximum amount of time in micro seconds to try and enqueue to vhost. */ #define VHOST_ENQ_RETRY_USECS 100 static const struct rte_eth_conf port_conf = { .rxmode = { .mq_mode = ETH_MQ_RX_RSS, .split_hdr_size = 0, .header_split = 0, /* Header Split disabled */ .hw_ip_checksum = 0, /* IP checksum offload disabled */ .hw_vlan_filter = 0, /* VLAN filtering disabled */ .jumbo_frame = 0, /* Jumbo Frame Support disabled */ .hw_strip_crc = 0, }, .rx_adv_conf = { .rss_conf = { .rss_key = NULL, .rss_hf = ETH_RSS_IP | ETH_RSS_UDP | ETH_RSS_TCP, }, }, .txmode = { .mq_mode = ETH_MQ_TX_NONE, }, }; enum { MAX_TX_QUEUE_LEN = 384 }; enum { DPDK_RING_SIZE = 256 }; BUILD_ASSERT_DECL(IS_POW2(DPDK_RING_SIZE)); enum { DRAIN_TSC = 200000ULL }; enum dpdk_dev_type { DPDK_DEV_ETH = 0, DPDK_DEV_VHOST = 1, }; static int rte_eal_init_ret = ENODEV; static struct ovs_mutex dpdk_mutex = OVS_MUTEX_INITIALIZER; /* Contains all 'struct dpdk_dev's. */ static struct ovs_list dpdk_list OVS_GUARDED_BY(dpdk_mutex) = OVS_LIST_INITIALIZER(&dpdk_list); static struct ovs_list dpdk_mp_list OVS_GUARDED_BY(dpdk_mutex) = OVS_LIST_INITIALIZER(&dpdk_mp_list); /* This mutex must be used by non pmd threads when allocating or freeing * mbufs through mempools. Since dpdk_queue_pkts() and dpdk_queue_flush() may * use mempools, a non pmd thread should hold this mutex while calling them */ static struct ovs_mutex nonpmd_mempool_mutex = OVS_MUTEX_INITIALIZER; struct dpdk_mp { struct rte_mempool *mp; int mtu; int socket_id; int refcount; struct ovs_list list_node OVS_GUARDED_BY(dpdk_mutex); }; /* There should be one 'struct dpdk_tx_queue' created for * each cpu core. */ struct dpdk_tx_queue { bool flush_tx; /* Set to true to flush queue everytime */ /* pkts are queued. */ int count; rte_spinlock_t tx_lock; /* Protects the members and the NIC queue * from concurrent access. It is used only * if the queue is shared among different * pmd threads (see 'txq_needs_locking'). */ uint64_t tsc; struct rte_mbuf *burst_pkts[MAX_TX_QUEUE_LEN]; }; /* dpdk has no way to remove dpdk ring ethernet devices so we have to keep them around once they've been created */ static struct ovs_list dpdk_ring_list OVS_GUARDED_BY(dpdk_mutex) = OVS_LIST_INITIALIZER(&dpdk_ring_list); struct dpdk_ring { /* For the client rings */ struct rte_ring *cring_tx; struct rte_ring *cring_rx; int user_port_id; /* User given port no, parsed from port name */ int eth_port_id; /* ethernet device port id */ struct ovs_list list_node OVS_GUARDED_BY(dpdk_mutex); }; struct netdev_dpdk { struct netdev up; int port_id; int max_packet_len; enum dpdk_dev_type type; struct dpdk_tx_queue *tx_q; struct ovs_mutex mutex OVS_ACQ_AFTER(dpdk_mutex); struct dpdk_mp *dpdk_mp; int mtu; int socket_id; int buf_size; struct netdev_stats stats; /* Protects stats */ rte_spinlock_t stats_lock; uint8_t hwaddr[ETH_ADDR_LEN]; enum netdev_flags flags; struct rte_eth_link link; int link_reset_cnt; /* The user might request more txqs than the NIC has. We remap those * ('up.n_txq') on these ('real_n_txq'). * If the numbers match, 'txq_needs_locking' is false, otherwise it is * true and we will take a spinlock on transmission */ int real_n_txq; bool txq_needs_locking; /* Spinlock for vhost transmission. Other DPDK devices use spinlocks in * dpdk_tx_queue */ rte_spinlock_t vhost_tx_lock; /* virtio-net structure for vhost device */ OVSRCU_TYPE(struct virtio_net *) virtio_dev; /* Identifier used to distinguish vhost devices from each other */ char vhost_id[PATH_MAX]; /* In dpdk_list. */ struct ovs_list list_node OVS_GUARDED_BY(dpdk_mutex); }; struct netdev_rxq_dpdk { struct netdev_rxq up; int port_id; }; static bool thread_is_pmd(void); static int netdev_dpdk_construct(struct netdev *); struct virtio_net * netdev_dpdk_get_virtio(const struct netdev_dpdk *dev); static bool is_dpdk_class(const struct netdev_class *class) { return class->construct == netdev_dpdk_construct; } /* XXX: use dpdk malloc for entire OVS. in fact huge page should be used * for all other segments data, bss and text. */ static void * dpdk_rte_mzalloc(size_t sz) { void *ptr; ptr = rte_zmalloc(OVS_VPORT_DPDK, sz, OVS_CACHE_LINE_SIZE); if (ptr == NULL) { out_of_memory(); } return ptr; } /* XXX this function should be called only by pmd threads (or by non pmd * threads holding the nonpmd_mempool_mutex) */ void free_dpdk_buf(struct dp_packet *p) { struct rte_mbuf *pkt = (struct rte_mbuf *) p; rte_pktmbuf_free_seg(pkt); } static void __rte_pktmbuf_init(struct rte_mempool *mp, void *opaque_arg OVS_UNUSED, void *_m, unsigned i OVS_UNUSED) { struct rte_mbuf *m = _m; uint32_t buf_len = mp->elt_size - sizeof(struct dp_packet); RTE_MBUF_ASSERT(mp->elt_size >= sizeof(struct dp_packet)); memset(m, 0, mp->elt_size); /* start of buffer is just after mbuf structure */ m->buf_addr = (char *)m + sizeof(struct dp_packet); m->buf_physaddr = rte_mempool_virt2phy(mp, m) + sizeof(struct dp_packet); m->buf_len = (uint16_t)buf_len; /* keep some headroom between start of buffer and data */ m->data_off = RTE_MIN(RTE_PKTMBUF_HEADROOM, m->buf_len); /* init some constant fields */ m->pool = mp; m->nb_segs = 1; m->port = 0xff; } static void ovs_rte_pktmbuf_init(struct rte_mempool *mp, void *opaque_arg OVS_UNUSED, void *_m, unsigned i OVS_UNUSED) { struct rte_mbuf *m = _m; __rte_pktmbuf_init(mp, opaque_arg, _m, i); dp_packet_init_dpdk((struct dp_packet *) m, m->buf_len); } static struct dpdk_mp * dpdk_mp_get(int socket_id, int mtu) OVS_REQUIRES(dpdk_mutex) { struct dpdk_mp *dmp = NULL; char mp_name[RTE_MEMPOOL_NAMESIZE]; unsigned mp_size; LIST_FOR_EACH (dmp, list_node, &dpdk_mp_list) { if (dmp->socket_id == socket_id && dmp->mtu == mtu) { dmp->refcount++; return dmp; } } dmp = dpdk_rte_mzalloc(sizeof *dmp); dmp->socket_id = socket_id; dmp->mtu = mtu; dmp->refcount = 1; mp_size = MAX_NB_MBUF; do { if (snprintf(mp_name, RTE_MEMPOOL_NAMESIZE, "ovs_mp_%d_%d_%u", dmp->mtu, dmp->socket_id, mp_size) < 0) { return NULL; } dmp->mp = rte_mempool_create(mp_name, mp_size, MBUF_SIZE(mtu), MP_CACHE_SZ, sizeof(struct rte_pktmbuf_pool_private), rte_pktmbuf_pool_init, NULL, ovs_rte_pktmbuf_init, NULL, socket_id, 0); } while (!dmp->mp && rte_errno == ENOMEM && (mp_size /= 2) >= MIN_NB_MBUF); if (dmp->mp == NULL) { return NULL; } else { VLOG_DBG("Allocated \"%s\" mempool with %u mbufs", mp_name, mp_size ); } list_push_back(&dpdk_mp_list, &dmp->list_node); return dmp; } static void dpdk_mp_put(struct dpdk_mp *dmp) { if (!dmp) { return; } dmp->refcount--; ovs_assert(dmp->refcount >= 0); #if 0 /* I could not find any API to destroy mp. */ if (dmp->refcount == 0) { list_delete(dmp->list_node); /* destroy mp-pool. */ } #endif } static void check_link_status(struct netdev_dpdk *dev) { struct rte_eth_link link; rte_eth_link_get_nowait(dev->port_id, &link); if (dev->link.link_status != link.link_status) { netdev_change_seq_changed(&dev->up); dev->link_reset_cnt++; dev->link = link; if (dev->link.link_status) { VLOG_DBG_RL(&rl, "Port %d Link Up - speed %u Mbps - %s", dev->port_id, (unsigned)dev->link.link_speed, (dev->link.link_duplex == ETH_LINK_FULL_DUPLEX) ? ("full-duplex") : ("half-duplex")); } else { VLOG_DBG_RL(&rl, "Port %d Link Down", dev->port_id); } } } static void * dpdk_watchdog(void *dummy OVS_UNUSED) { struct netdev_dpdk *dev; pthread_detach(pthread_self()); for (;;) { ovs_mutex_lock(&dpdk_mutex); LIST_FOR_EACH (dev, list_node, &dpdk_list) { ovs_mutex_lock(&dev->mutex); check_link_status(dev); ovs_mutex_unlock(&dev->mutex); } ovs_mutex_unlock(&dpdk_mutex); xsleep(DPDK_PORT_WATCHDOG_INTERVAL); } return NULL; } static int dpdk_eth_dev_queue_setup(struct netdev_dpdk *dev, int n_rxq, int n_txq) { int diag = 0; int i; /* A device may report more queues than it makes available (this has * been observed for Intel xl710, which reserves some of them for * SRIOV): rte_eth_*_queue_setup will fail if a queue is not * available. When this happens we can retry the configuration * and request less queues */ while (n_rxq && n_txq) { if (diag) { VLOG_INFO("Retrying setup with (rxq:%d txq:%d)", n_rxq, n_txq); } diag = rte_eth_dev_configure(dev->port_id, n_rxq, n_txq, &port_conf); if (diag) { break; } for (i = 0; i < n_txq; i++) { diag = rte_eth_tx_queue_setup(dev->port_id, i, NIC_PORT_TX_Q_SIZE, dev->socket_id, NULL); if (diag) { VLOG_INFO("Interface %s txq(%d) setup error: %s", dev->up.name, i, rte_strerror(-diag)); break; } } if (i != n_txq) { /* Retry with less tx queues */ n_txq = i; continue; } for (i = 0; i < n_rxq; i++) { diag = rte_eth_rx_queue_setup(dev->port_id, i, NIC_PORT_RX_Q_SIZE, dev->socket_id, NULL, dev->dpdk_mp->mp); if (diag) { VLOG_INFO("Interface %s rxq(%d) setup error: %s", dev->up.name, i, rte_strerror(-diag)); break; } } if (i != n_rxq) { /* Retry with less rx queues */ n_rxq = i; continue; } dev->up.n_rxq = n_rxq; dev->real_n_txq = n_txq; return 0; } return diag; } static int dpdk_eth_dev_init(struct netdev_dpdk *dev) OVS_REQUIRES(dpdk_mutex) { struct rte_pktmbuf_pool_private *mbp_priv; struct rte_eth_dev_info info; struct ether_addr eth_addr; int diag; int n_rxq, n_txq; if (dev->port_id < 0 || dev->port_id >= rte_eth_dev_count()) { return ENODEV; } rte_eth_dev_info_get(dev->port_id, &info); n_rxq = MIN(info.max_rx_queues, dev->up.n_rxq); n_txq = MIN(info.max_tx_queues, dev->up.n_txq); diag = dpdk_eth_dev_queue_setup(dev, n_rxq, n_txq); if (diag) { VLOG_ERR("Interface %s(rxq:%d txq:%d) configure error: %s", dev->up.name, n_rxq, n_txq, rte_strerror(-diag)); return -diag; } diag = rte_eth_dev_start(dev->port_id); if (diag) { VLOG_ERR("Interface %s start error: %s", dev->up.name, rte_strerror(-diag)); return -diag; } rte_eth_promiscuous_enable(dev->port_id); rte_eth_allmulticast_enable(dev->port_id); memset(ð_addr, 0x0, sizeof(eth_addr)); rte_eth_macaddr_get(dev->port_id, ð_addr); VLOG_INFO_RL(&rl, "Port %d: "ETH_ADDR_FMT"", dev->port_id, ETH_ADDR_ARGS(eth_addr.addr_bytes)); memcpy(dev->hwaddr, eth_addr.addr_bytes, ETH_ADDR_LEN); rte_eth_link_get_nowait(dev->port_id, &dev->link); mbp_priv = rte_mempool_get_priv(dev->dpdk_mp->mp); dev->buf_size = mbp_priv->mbuf_data_room_size - RTE_PKTMBUF_HEADROOM; dev->flags = NETDEV_UP | NETDEV_PROMISC; return 0; } static struct netdev_dpdk * netdev_dpdk_cast(const struct netdev *netdev) { return CONTAINER_OF(netdev, struct netdev_dpdk, up); } static struct netdev * netdev_dpdk_alloc(void) { struct netdev_dpdk *netdev = dpdk_rte_mzalloc(sizeof *netdev); return &netdev->up; } static void netdev_dpdk_alloc_txq(struct netdev_dpdk *netdev, unsigned int n_txqs) { unsigned i; netdev->tx_q = dpdk_rte_mzalloc(n_txqs * sizeof *netdev->tx_q); for (i = 0; i < n_txqs; i++) { int numa_id = ovs_numa_get_numa_id(i); if (!netdev->txq_needs_locking) { /* Each index is considered as a cpu core id, since there should * be one tx queue for each cpu core. If the corresponding core * is not on the same numa node as 'netdev', flags the * 'flush_tx'. */ netdev->tx_q[i].flush_tx = netdev->socket_id == numa_id; } else { /* Queues are shared among CPUs. Always flush */ netdev->tx_q[i].flush_tx = true; } rte_spinlock_init(&netdev->tx_q[i].tx_lock); } } static int netdev_dpdk_init(struct netdev *netdev_, unsigned int port_no, enum dpdk_dev_type type) OVS_REQUIRES(dpdk_mutex) { struct netdev_dpdk *netdev = netdev_dpdk_cast(netdev_); int sid; int err = 0; ovs_mutex_init(&netdev->mutex); ovs_mutex_lock(&netdev->mutex); rte_spinlock_init(&netdev->stats_lock); /* If the 'sid' is negative, it means that the kernel fails * to obtain the pci numa info. In that situation, always * use 'SOCKET0'. */ if (type == DPDK_DEV_ETH) { sid = rte_eth_dev_socket_id(port_no); } else { sid = rte_lcore_to_socket_id(rte_get_master_lcore()); } netdev->socket_id = sid < 0 ? SOCKET0 : sid; netdev->port_id = port_no; netdev->type = type; netdev->flags = 0; netdev->mtu = ETHER_MTU; netdev->max_packet_len = MTU_TO_MAX_LEN(netdev->mtu); netdev->dpdk_mp = dpdk_mp_get(netdev->socket_id, netdev->mtu); if (!netdev->dpdk_mp) { err = ENOMEM; goto unlock; } netdev_->n_txq = NR_QUEUE; netdev_->n_rxq = NR_QUEUE; netdev->real_n_txq = NR_QUEUE; if (type == DPDK_DEV_ETH) { netdev_dpdk_alloc_txq(netdev, NR_QUEUE); err = dpdk_eth_dev_init(netdev); if (err) { goto unlock; } } list_push_back(&dpdk_list, &netdev->list_node); unlock: if (err) { rte_free(netdev->tx_q); } ovs_mutex_unlock(&netdev->mutex); return err; } static int dpdk_dev_parse_name(const char dev_name[], const char prefix[], unsigned int *port_no) { const char *cport; if (strncmp(dev_name, prefix, strlen(prefix))) { return ENODEV; } cport = dev_name + strlen(prefix); *port_no = strtol(cport, NULL, 0); /* string must be null terminated */ return 0; } static int vhost_construct_helper(struct netdev *netdev_) OVS_REQUIRES(dpdk_mutex) { struct netdev_dpdk *netdev = netdev_dpdk_cast(netdev_); if (rte_eal_init_ret) { return rte_eal_init_ret; } rte_spinlock_init(&netdev->vhost_tx_lock); return netdev_dpdk_init(netdev_, -1, DPDK_DEV_VHOST); } static int netdev_dpdk_vhost_cuse_construct(struct netdev *netdev_) { struct netdev_dpdk *netdev = netdev_dpdk_cast(netdev_); int err; ovs_mutex_lock(&dpdk_mutex); strncpy(netdev->vhost_id, netdev->up.name, sizeof(netdev->vhost_id)); err = vhost_construct_helper(netdev_); ovs_mutex_unlock(&dpdk_mutex); return err; } static int netdev_dpdk_vhost_user_construct(struct netdev *netdev_) { struct netdev_dpdk *netdev = netdev_dpdk_cast(netdev_); int err; ovs_mutex_lock(&dpdk_mutex); /* Take the name of the vhost-user port and append it to the location where * the socket is to be created, then register the socket. */ snprintf(netdev->vhost_id, sizeof(netdev->vhost_id), "%s/%s", vhost_sock_dir, netdev_->name); err = rte_vhost_driver_register(netdev->vhost_id); if (err) { VLOG_ERR("vhost-user socket device setup failure for socket %s\n", netdev->vhost_id); } VLOG_INFO("Socket %s created for vhost-user port %s\n", netdev->vhost_id, netdev_->name); err = vhost_construct_helper(netdev_); ovs_mutex_unlock(&dpdk_mutex); return err; } static int netdev_dpdk_construct(struct netdev *netdev) { unsigned int port_no; int err; if (rte_eal_init_ret) { return rte_eal_init_ret; } /* Names always start with "dpdk" */ err = dpdk_dev_parse_name(netdev->name, "dpdk", &port_no); if (err) { return err; } ovs_mutex_lock(&dpdk_mutex); err = netdev_dpdk_init(netdev, port_no, DPDK_DEV_ETH); ovs_mutex_unlock(&dpdk_mutex); return err; } static void netdev_dpdk_destruct(struct netdev *netdev_) { struct netdev_dpdk *dev = netdev_dpdk_cast(netdev_); ovs_mutex_lock(&dev->mutex); rte_eth_dev_stop(dev->port_id); ovs_mutex_unlock(&dev->mutex); ovs_mutex_lock(&dpdk_mutex); rte_free(dev->tx_q); list_remove(&dev->list_node); dpdk_mp_put(dev->dpdk_mp); ovs_mutex_unlock(&dpdk_mutex); } static void netdev_dpdk_vhost_destruct(struct netdev *netdev_) { struct netdev_dpdk *dev = netdev_dpdk_cast(netdev_); /* Can't remove a port while a guest is attached to it. */ if (netdev_dpdk_get_virtio(dev) != NULL) { VLOG_ERR("Can not remove port, vhost device still attached"); return; } ovs_mutex_lock(&dpdk_mutex); list_remove(&dev->list_node); dpdk_mp_put(dev->dpdk_mp); ovs_mutex_unlock(&dpdk_mutex); } static void netdev_dpdk_dealloc(struct netdev *netdev_) { struct netdev_dpdk *netdev = netdev_dpdk_cast(netdev_); rte_free(netdev); } static int netdev_dpdk_get_config(const struct netdev *netdev_, struct smap *args) { struct netdev_dpdk *dev = netdev_dpdk_cast(netdev_); ovs_mutex_lock(&dev->mutex); smap_add_format(args, "configured_rx_queues", "%d", netdev_->n_rxq); smap_add_format(args, "requested_tx_queues", "%d", netdev_->n_txq); smap_add_format(args, "configured_tx_queues", "%d", dev->real_n_txq); ovs_mutex_unlock(&dev->mutex); return 0; } static int netdev_dpdk_get_numa_id(const struct netdev *netdev_) { struct netdev_dpdk *netdev = netdev_dpdk_cast(netdev_); return netdev->socket_id; } /* Sets the number of tx queues and rx queues for the dpdk interface. * If the configuration fails, do not try restoring its old configuration * and just returns the error. */ static int netdev_dpdk_set_multiq(struct netdev *netdev_, unsigned int n_txq, unsigned int n_rxq) { struct netdev_dpdk *netdev = netdev_dpdk_cast(netdev_); int err = 0; int old_rxq, old_txq; if (netdev->up.n_txq == n_txq && netdev->up.n_rxq == n_rxq) { return err; } ovs_mutex_lock(&dpdk_mutex); ovs_mutex_lock(&netdev->mutex); rte_eth_dev_stop(netdev->port_id); old_txq = netdev->up.n_txq; old_rxq = netdev->up.n_rxq; netdev->up.n_txq = n_txq; netdev->up.n_rxq = n_rxq; rte_free(netdev->tx_q); err = dpdk_eth_dev_init(netdev); netdev_dpdk_alloc_txq(netdev, netdev->real_n_txq); if (err) { /* If there has been an error, it means that the requested queues * have not been created. Restore the old numbers. */ netdev->up.n_txq = old_txq; netdev->up.n_rxq = old_rxq; } netdev->txq_needs_locking = netdev->real_n_txq != netdev->up.n_txq; ovs_mutex_unlock(&netdev->mutex); ovs_mutex_unlock(&dpdk_mutex); return err; } static int netdev_dpdk_vhost_set_multiq(struct netdev *netdev_, unsigned int n_txq, unsigned int n_rxq) { struct netdev_dpdk *netdev = netdev_dpdk_cast(netdev_); int err = 0; if (netdev->up.n_txq == n_txq && netdev->up.n_rxq == n_rxq) { return err; } ovs_mutex_lock(&dpdk_mutex); ovs_mutex_lock(&netdev->mutex); netdev->up.n_txq = n_txq; netdev->real_n_txq = 1; netdev->up.n_rxq = 1; ovs_mutex_unlock(&netdev->mutex); ovs_mutex_unlock(&dpdk_mutex); return err; } static struct netdev_rxq * netdev_dpdk_rxq_alloc(void) { struct netdev_rxq_dpdk *rx = dpdk_rte_mzalloc(sizeof *rx); return &rx->up; } static struct netdev_rxq_dpdk * netdev_rxq_dpdk_cast(const struct netdev_rxq *rx) { return CONTAINER_OF(rx, struct netdev_rxq_dpdk, up); } static int netdev_dpdk_rxq_construct(struct netdev_rxq *rxq_) { struct netdev_rxq_dpdk *rx = netdev_rxq_dpdk_cast(rxq_); struct netdev_dpdk *netdev = netdev_dpdk_cast(rx->up.netdev); ovs_mutex_lock(&netdev->mutex); rx->port_id = netdev->port_id; ovs_mutex_unlock(&netdev->mutex); return 0; } static void netdev_dpdk_rxq_destruct(struct netdev_rxq *rxq_ OVS_UNUSED) { } static void netdev_dpdk_rxq_dealloc(struct netdev_rxq *rxq_) { struct netdev_rxq_dpdk *rx = netdev_rxq_dpdk_cast(rxq_); rte_free(rx); } static inline void dpdk_queue_flush__(struct netdev_dpdk *dev, int qid) { struct dpdk_tx_queue *txq = &dev->tx_q[qid]; uint32_t nb_tx = 0; while (nb_tx != txq->count) { uint32_t ret; ret = rte_eth_tx_burst(dev->port_id, qid, txq->burst_pkts + nb_tx, txq->count - nb_tx); if (!ret) { break; } nb_tx += ret; } if (OVS_UNLIKELY(nb_tx != txq->count)) { /* free buffers, which we couldn't transmit, one at a time (each * packet could come from a different mempool) */ int i; for (i = nb_tx; i < txq->count; i++) { rte_pktmbuf_free_seg(txq->burst_pkts[i]); } rte_spinlock_lock(&dev->stats_lock); dev->stats.tx_dropped += txq->count-nb_tx; rte_spinlock_unlock(&dev->stats_lock); } txq->count = 0; txq->tsc = rte_get_timer_cycles(); } static inline void dpdk_queue_flush(struct netdev_dpdk *dev, int qid) { struct dpdk_tx_queue *txq = &dev->tx_q[qid]; if (txq->count == 0) { return; } dpdk_queue_flush__(dev, qid); } static bool is_vhost_running(struct virtio_net *dev) { return (dev != NULL && (dev->flags & VIRTIO_DEV_RUNNING)); } /* * The receive path for the vhost port is the TX path out from guest. */ static int netdev_dpdk_vhost_rxq_recv(struct netdev_rxq *rxq_, struct dp_packet **packets, int *c) { struct netdev_rxq_dpdk *rx = netdev_rxq_dpdk_cast(rxq_); struct netdev *netdev = rx->up.netdev; struct netdev_dpdk *vhost_dev = netdev_dpdk_cast(netdev); struct virtio_net *virtio_dev = netdev_dpdk_get_virtio(vhost_dev); int qid = 1; uint16_t nb_rx = 0; if (OVS_UNLIKELY(!is_vhost_running(virtio_dev))) { return EAGAIN; } nb_rx = rte_vhost_dequeue_burst(virtio_dev, qid, vhost_dev->dpdk_mp->mp, (struct rte_mbuf **)packets, NETDEV_MAX_BURST); if (!nb_rx) { return EAGAIN; } rte_spinlock_lock(&vhost_dev->stats_lock); vhost_dev->stats.rx_packets += (uint64_t)nb_rx; rte_spinlock_unlock(&vhost_dev->stats_lock); *c = (int) nb_rx; return 0; } static int netdev_dpdk_rxq_recv(struct netdev_rxq *rxq_, struct dp_packet **packets, int *c) { struct netdev_rxq_dpdk *rx = netdev_rxq_dpdk_cast(rxq_); struct netdev *netdev = rx->up.netdev; struct netdev_dpdk *dev = netdev_dpdk_cast(netdev); int nb_rx; /* There is only one tx queue for this core. Do not flush other * queues. * Do not flush tx queue which is shared among CPUs * since it is always flushed */ if (rxq_->queue_id == rte_lcore_id() && OVS_LIKELY(!dev->txq_needs_locking)) { dpdk_queue_flush(dev, rxq_->queue_id); } nb_rx = rte_eth_rx_burst(rx->port_id, rxq_->queue_id, (struct rte_mbuf **) packets, NETDEV_MAX_BURST); if (!nb_rx) { return EAGAIN; } *c = nb_rx; return 0; } static void __netdev_dpdk_vhost_send(struct netdev *netdev, struct dp_packet **pkts, int cnt, bool may_steal) { struct netdev_dpdk *vhost_dev = netdev_dpdk_cast(netdev); struct virtio_net *virtio_dev = netdev_dpdk_get_virtio(vhost_dev); struct rte_mbuf **cur_pkts = (struct rte_mbuf **) pkts; unsigned int total_pkts = cnt; uint64_t start = 0; if (OVS_UNLIKELY(!is_vhost_running(virtio_dev))) { rte_spinlock_lock(&vhost_dev->stats_lock); vhost_dev->stats.tx_dropped+= cnt; rte_spinlock_unlock(&vhost_dev->stats_lock); goto out; } /* There is vHost TX single queue, So we need to lock it for TX. */ rte_spinlock_lock(&vhost_dev->vhost_tx_lock); do { unsigned int tx_pkts; tx_pkts = rte_vhost_enqueue_burst(virtio_dev, VIRTIO_RXQ, cur_pkts, cnt); if (OVS_LIKELY(tx_pkts)) { /* Packets have been sent.*/ cnt -= tx_pkts; /* Prepare for possible next iteration.*/ cur_pkts = &cur_pkts[tx_pkts]; } else { uint64_t timeout = VHOST_ENQ_RETRY_USECS * rte_get_timer_hz() / 1E6; unsigned int expired = 0; if (!start) { start = rte_get_timer_cycles(); } /* * Unable to enqueue packets to vhost interface. * Check available entries before retrying. */ while (!rte_vring_available_entries(virtio_dev, VIRTIO_RXQ)) { if (OVS_UNLIKELY((rte_get_timer_cycles() - start) > timeout)) { expired = 1; break; } } if (expired) { /* break out of main loop. */ break; } } } while (cnt); rte_spinlock_unlock(&vhost_dev->vhost_tx_lock); rte_spinlock_lock(&vhost_dev->stats_lock); vhost_dev->stats.tx_packets += (total_pkts - cnt); vhost_dev->stats.tx_dropped += cnt; rte_spinlock_unlock(&vhost_dev->stats_lock); out: if (may_steal) { int i; for (i = 0; i < total_pkts; i++) { dp_packet_delete(pkts[i]); } } } inline static void dpdk_queue_pkts(struct netdev_dpdk *dev, int qid, struct rte_mbuf **pkts, int cnt) { struct dpdk_tx_queue *txq = &dev->tx_q[qid]; uint64_t diff_tsc; int i = 0; while (i < cnt) { int freeslots = MAX_TX_QUEUE_LEN - txq->count; int tocopy = MIN(freeslots, cnt-i); memcpy(&txq->burst_pkts[txq->count], &pkts[i], tocopy * sizeof (struct rte_mbuf *)); txq->count += tocopy; i += tocopy; if (txq->count == MAX_TX_QUEUE_LEN || txq->flush_tx) { dpdk_queue_flush__(dev, qid); } diff_tsc = rte_get_timer_cycles() - txq->tsc; if (diff_tsc >= DRAIN_TSC) { dpdk_queue_flush__(dev, qid); } } } /* Tx function. Transmit packets indefinitely */ static void dpdk_do_tx_copy(struct netdev *netdev, int qid, struct dp_packet **pkts, int cnt) OVS_NO_THREAD_SAFETY_ANALYSIS { #if !defined(__CHECKER__) && !defined(_WIN32) const size_t PKT_ARRAY_SIZE = cnt; #else /* Sparse or MSVC doesn't like variable length array. */ enum { PKT_ARRAY_SIZE = NETDEV_MAX_BURST }; #endif struct netdev_dpdk *dev = netdev_dpdk_cast(netdev); struct rte_mbuf *mbufs[PKT_ARRAY_SIZE]; int dropped = 0; int newcnt = 0; int i; /* If we are on a non pmd thread we have to use the mempool mutex, because * every non pmd thread shares the same mempool cache */ if (!thread_is_pmd()) { ovs_mutex_lock(&nonpmd_mempool_mutex); } for (i = 0; i < cnt; i++) { int size = dp_packet_size(pkts[i]); if (OVS_UNLIKELY(size > dev->max_packet_len)) { VLOG_WARN_RL(&rl, "Too big size %d max_packet_len %d", (int)size , dev->max_packet_len); dropped++; continue; } mbufs[newcnt] = rte_pktmbuf_alloc(dev->dpdk_mp->mp); if (!mbufs[newcnt]) { dropped += cnt - i; break; } /* We have to do a copy for now */ memcpy(rte_pktmbuf_mtod(mbufs[newcnt], void *), dp_packet_data(pkts[i]), size); rte_pktmbuf_data_len(mbufs[newcnt]) = size; rte_pktmbuf_pkt_len(mbufs[newcnt]) = size; newcnt++; } if (OVS_UNLIKELY(dropped)) { rte_spinlock_lock(&dev->stats_lock); dev->stats.tx_dropped += dropped; rte_spinlock_unlock(&dev->stats_lock); } if (dev->type == DPDK_DEV_VHOST) { __netdev_dpdk_vhost_send(netdev, (struct dp_packet **) mbufs, newcnt, true); } else { dpdk_queue_pkts(dev, qid, mbufs, newcnt); dpdk_queue_flush(dev, qid); } if (!thread_is_pmd()) { ovs_mutex_unlock(&nonpmd_mempool_mutex); } } static int netdev_dpdk_vhost_send(struct netdev *netdev, int qid OVS_UNUSED, struct dp_packet **pkts, int cnt, bool may_steal) { if (OVS_UNLIKELY(pkts[0]->source != DPBUF_DPDK)) { int i; dpdk_do_tx_copy(netdev, qid, pkts, cnt); if (may_steal) { for (i = 0; i < cnt; i++) { dp_packet_delete(pkts[i]); } } } else { __netdev_dpdk_vhost_send(netdev, pkts, cnt, may_steal); } return 0; } static inline void netdev_dpdk_send__(struct netdev_dpdk *dev, int qid, struct dp_packet **pkts, int cnt, bool may_steal) { int i; if (OVS_UNLIKELY(dev->txq_needs_locking)) { qid = qid % dev->real_n_txq; rte_spinlock_lock(&dev->tx_q[qid].tx_lock); } if (OVS_UNLIKELY(!may_steal || pkts[0]->source != DPBUF_DPDK)) { struct netdev *netdev = &dev->up; dpdk_do_tx_copy(netdev, qid, pkts, cnt); if (may_steal) { for (i = 0; i < cnt; i++) { dp_packet_delete(pkts[i]); } } } else { int next_tx_idx = 0; int dropped = 0; for (i = 0; i < cnt; i++) { int size = dp_packet_size(pkts[i]); if (OVS_UNLIKELY(size > dev->max_packet_len)) { if (next_tx_idx != i) { dpdk_queue_pkts(dev, qid, (struct rte_mbuf **)&pkts[next_tx_idx], i-next_tx_idx); } VLOG_WARN_RL(&rl, "Too big size %d max_packet_len %d", (int)size , dev->max_packet_len); dp_packet_delete(pkts[i]); dropped++; next_tx_idx = i + 1; } } if (next_tx_idx != cnt) { dpdk_queue_pkts(dev, qid, (struct rte_mbuf **)&pkts[next_tx_idx], cnt-next_tx_idx); } if (OVS_UNLIKELY(dropped)) { rte_spinlock_lock(&dev->stats_lock); dev->stats.tx_dropped += dropped; rte_spinlock_unlock(&dev->stats_lock); } } if (OVS_UNLIKELY(dev->txq_needs_locking)) { rte_spinlock_unlock(&dev->tx_q[qid].tx_lock); } } static int netdev_dpdk_eth_send(struct netdev *netdev, int qid, struct dp_packet **pkts, int cnt, bool may_steal) { struct netdev_dpdk *dev = netdev_dpdk_cast(netdev); netdev_dpdk_send__(dev, qid, pkts, cnt, may_steal); return 0; } static int netdev_dpdk_set_etheraddr(struct netdev *netdev, const uint8_t mac[ETH_ADDR_LEN]) { struct netdev_dpdk *dev = netdev_dpdk_cast(netdev); ovs_mutex_lock(&dev->mutex); if (!eth_addr_equals(dev->hwaddr, mac)) { memcpy(dev->hwaddr, mac, ETH_ADDR_LEN); netdev_change_seq_changed(netdev); } ovs_mutex_unlock(&dev->mutex); return 0; } static int netdev_dpdk_get_etheraddr(const struct netdev *netdev, uint8_t mac[ETH_ADDR_LEN]) { struct netdev_dpdk *dev = netdev_dpdk_cast(netdev); ovs_mutex_lock(&dev->mutex); memcpy(mac, dev->hwaddr, ETH_ADDR_LEN); ovs_mutex_unlock(&dev->mutex); return 0; } static int netdev_dpdk_get_mtu(const struct netdev *netdev, int *mtup) { struct netdev_dpdk *dev = netdev_dpdk_cast(netdev); ovs_mutex_lock(&dev->mutex); *mtup = dev->mtu; ovs_mutex_unlock(&dev->mutex); return 0; } static int netdev_dpdk_set_mtu(const struct netdev *netdev, int mtu) { struct netdev_dpdk *dev = netdev_dpdk_cast(netdev); int old_mtu, err; struct dpdk_mp *old_mp; struct dpdk_mp *mp; ovs_mutex_lock(&dpdk_mutex); ovs_mutex_lock(&dev->mutex); if (dev->mtu == mtu) { err = 0; goto out; } mp = dpdk_mp_get(dev->socket_id, dev->mtu); if (!mp) { err = ENOMEM; goto out; } rte_eth_dev_stop(dev->port_id); old_mtu = dev->mtu; old_mp = dev->dpdk_mp; dev->dpdk_mp = mp; dev->mtu = mtu; dev->max_packet_len = MTU_TO_MAX_LEN(dev->mtu); err = dpdk_eth_dev_init(dev); if (err) { dpdk_mp_put(mp); dev->mtu = old_mtu; dev->dpdk_mp = old_mp; dev->max_packet_len = MTU_TO_MAX_LEN(dev->mtu); dpdk_eth_dev_init(dev); goto out; } dpdk_mp_put(old_mp); netdev_change_seq_changed(netdev); out: ovs_mutex_unlock(&dev->mutex); ovs_mutex_unlock(&dpdk_mutex); return err; } static int netdev_dpdk_get_carrier(const struct netdev *netdev_, bool *carrier); static int netdev_dpdk_vhost_get_stats(const struct netdev *netdev, struct netdev_stats *stats) { struct netdev_dpdk *dev = netdev_dpdk_cast(netdev); ovs_mutex_lock(&dev->mutex); memset(stats, 0, sizeof(*stats)); /* Unsupported Stats */ stats->rx_errors = UINT64_MAX; stats->tx_errors = UINT64_MAX; stats->multicast = UINT64_MAX; stats->collisions = UINT64_MAX; stats->rx_crc_errors = UINT64_MAX; stats->rx_fifo_errors = UINT64_MAX; stats->rx_frame_errors = UINT64_MAX; stats->rx_length_errors = UINT64_MAX; stats->rx_missed_errors = UINT64_MAX; stats->rx_over_errors = UINT64_MAX; stats->tx_aborted_errors = UINT64_MAX; stats->tx_carrier_errors = UINT64_MAX; stats->tx_errors = UINT64_MAX; stats->tx_fifo_errors = UINT64_MAX; stats->tx_heartbeat_errors = UINT64_MAX; stats->tx_window_errors = UINT64_MAX; stats->rx_bytes += UINT64_MAX; stats->rx_dropped += UINT64_MAX; stats->tx_bytes += UINT64_MAX; rte_spinlock_lock(&dev->stats_lock); /* Supported Stats */ stats->rx_packets += dev->stats.rx_packets; stats->tx_packets += dev->stats.tx_packets; stats->tx_dropped += dev->stats.tx_dropped; rte_spinlock_unlock(&dev->stats_lock); ovs_mutex_unlock(&dev->mutex); return 0; } static int netdev_dpdk_get_stats(const struct netdev *netdev, struct netdev_stats *stats) { struct netdev_dpdk *dev = netdev_dpdk_cast(netdev); struct rte_eth_stats rte_stats; bool gg; netdev_dpdk_get_carrier(netdev, &gg); ovs_mutex_lock(&dev->mutex); rte_eth_stats_get(dev->port_id, &rte_stats); memset(stats, 0, sizeof(*stats)); stats->rx_packets = rte_stats.ipackets; stats->tx_packets = rte_stats.opackets; stats->rx_bytes = rte_stats.ibytes; stats->tx_bytes = rte_stats.obytes; stats->rx_errors = rte_stats.ierrors; stats->tx_errors = rte_stats.oerrors; stats->multicast = rte_stats.imcasts; rte_spinlock_lock(&dev->stats_lock); stats->tx_dropped = dev->stats.tx_dropped; rte_spinlock_unlock(&dev->stats_lock); ovs_mutex_unlock(&dev->mutex); return 0; } static int netdev_dpdk_get_features(const struct netdev *netdev_, enum netdev_features *current, enum netdev_features *advertised OVS_UNUSED, enum netdev_features *supported OVS_UNUSED, enum netdev_features *peer OVS_UNUSED) { struct netdev_dpdk *dev = netdev_dpdk_cast(netdev_); struct rte_eth_link link; ovs_mutex_lock(&dev->mutex); link = dev->link; ovs_mutex_unlock(&dev->mutex); if (link.link_duplex == ETH_LINK_AUTONEG_DUPLEX) { if (link.link_speed == ETH_LINK_SPEED_AUTONEG) { *current = NETDEV_F_AUTONEG; } } else if (link.link_duplex == ETH_LINK_HALF_DUPLEX) { if (link.link_speed == ETH_LINK_SPEED_10) { *current = NETDEV_F_10MB_HD; } if (link.link_speed == ETH_LINK_SPEED_100) { *current = NETDEV_F_100MB_HD; } if (link.link_speed == ETH_LINK_SPEED_1000) { *current = NETDEV_F_1GB_HD; } } else if (link.link_duplex == ETH_LINK_FULL_DUPLEX) { if (link.link_speed == ETH_LINK_SPEED_10) { *current = NETDEV_F_10MB_FD; } if (link.link_speed == ETH_LINK_SPEED_100) { *current = NETDEV_F_100MB_FD; } if (link.link_speed == ETH_LINK_SPEED_1000) { *current = NETDEV_F_1GB_FD; } if (link.link_speed == ETH_LINK_SPEED_10000) { *current = NETDEV_F_10GB_FD; } } return 0; } static int netdev_dpdk_get_ifindex(const struct netdev *netdev) { struct netdev_dpdk *dev = netdev_dpdk_cast(netdev); int ifindex; ovs_mutex_lock(&dev->mutex); ifindex = dev->port_id; ovs_mutex_unlock(&dev->mutex); return ifindex; } static int netdev_dpdk_get_carrier(const struct netdev *netdev_, bool *carrier) { struct netdev_dpdk *dev = netdev_dpdk_cast(netdev_); ovs_mutex_lock(&dev->mutex); check_link_status(dev); *carrier = dev->link.link_status; ovs_mutex_unlock(&dev->mutex); return 0; } static int netdev_dpdk_vhost_get_carrier(const struct netdev *netdev_, bool *carrier) { struct netdev_dpdk *dev = netdev_dpdk_cast(netdev_); struct virtio_net *virtio_dev = netdev_dpdk_get_virtio(dev); ovs_mutex_lock(&dev->mutex); if (is_vhost_running(virtio_dev)) { *carrier = 1; } else { *carrier = 0; } ovs_mutex_unlock(&dev->mutex); return 0; } static long long int netdev_dpdk_get_carrier_resets(const struct netdev *netdev_) { struct netdev_dpdk *dev = netdev_dpdk_cast(netdev_); long long int carrier_resets; ovs_mutex_lock(&dev->mutex); carrier_resets = dev->link_reset_cnt; ovs_mutex_unlock(&dev->mutex); return carrier_resets; } static int netdev_dpdk_set_miimon(struct netdev *netdev_ OVS_UNUSED, long long int interval OVS_UNUSED) { return EOPNOTSUPP; } static int netdev_dpdk_update_flags__(struct netdev_dpdk *dev, enum netdev_flags off, enum netdev_flags on, enum netdev_flags *old_flagsp) OVS_REQUIRES(dev->mutex) { int err; if ((off | on) & ~(NETDEV_UP | NETDEV_PROMISC)) { return EINVAL; } *old_flagsp = dev->flags; dev->flags |= on; dev->flags &= ~off; if (dev->flags == *old_flagsp) { return 0; } if (dev->type == DPDK_DEV_ETH) { if (dev->flags & NETDEV_UP) { err = rte_eth_dev_start(dev->port_id); if (err) return -err; } if (dev->flags & NETDEV_PROMISC) { rte_eth_promiscuous_enable(dev->port_id); } if (!(dev->flags & NETDEV_UP)) { rte_eth_dev_stop(dev->port_id); } } return 0; } static int netdev_dpdk_update_flags(struct netdev *netdev_, enum netdev_flags off, enum netdev_flags on, enum netdev_flags *old_flagsp) { struct netdev_dpdk *netdev = netdev_dpdk_cast(netdev_); int error; ovs_mutex_lock(&netdev->mutex); error = netdev_dpdk_update_flags__(netdev, off, on, old_flagsp); ovs_mutex_unlock(&netdev->mutex); return error; } static int netdev_dpdk_get_status(const struct netdev *netdev_, struct smap *args) { struct netdev_dpdk *dev = netdev_dpdk_cast(netdev_); struct rte_eth_dev_info dev_info; if (dev->port_id < 0) return ENODEV; ovs_mutex_lock(&dev->mutex); rte_eth_dev_info_get(dev->port_id, &dev_info); ovs_mutex_unlock(&dev->mutex); smap_add_format(args, "driver_name", "%s", dev_info.driver_name); smap_add_format(args, "port_no", "%d", dev->port_id); smap_add_format(args, "numa_id", "%d", rte_eth_dev_socket_id(dev->port_id)); smap_add_format(args, "driver_name", "%s", dev_info.driver_name); smap_add_format(args, "min_rx_bufsize", "%u", dev_info.min_rx_bufsize); smap_add_format(args, "max_rx_pktlen", "%u", dev_info.max_rx_pktlen); smap_add_format(args, "max_rx_queues", "%u", dev_info.max_rx_queues); smap_add_format(args, "max_tx_queues", "%u", dev_info.max_tx_queues); smap_add_format(args, "max_mac_addrs", "%u", dev_info.max_mac_addrs); smap_add_format(args, "max_hash_mac_addrs", "%u", dev_info.max_hash_mac_addrs); smap_add_format(args, "max_vfs", "%u", dev_info.max_vfs); smap_add_format(args, "max_vmdq_pools", "%u", dev_info.max_vmdq_pools); smap_add_format(args, "pci-vendor_id", "0x%u", dev_info.pci_dev->id.vendor_id); smap_add_format(args, "pci-device_id", "0x%x", dev_info.pci_dev->id.device_id); return 0; } static void netdev_dpdk_set_admin_state__(struct netdev_dpdk *dev, bool admin_state) OVS_REQUIRES(dev->mutex) { enum netdev_flags old_flags; if (admin_state) { netdev_dpdk_update_flags__(dev, 0, NETDEV_UP, &old_flags); } else { netdev_dpdk_update_flags__(dev, NETDEV_UP, 0, &old_flags); } } static void netdev_dpdk_set_admin_state(struct unixctl_conn *conn, int argc, const char *argv[], void *aux OVS_UNUSED) { bool up; if (!strcasecmp(argv[argc - 1], "up")) { up = true; } else if ( !strcasecmp(argv[argc - 1], "down")) { up = false; } else { unixctl_command_reply_error(conn, "Invalid Admin State"); return; } if (argc > 2) { struct netdev *netdev = netdev_from_name(argv[1]); if (netdev && is_dpdk_class(netdev->netdev_class)) { struct netdev_dpdk *dpdk_dev = netdev_dpdk_cast(netdev); ovs_mutex_lock(&dpdk_dev->mutex); netdev_dpdk_set_admin_state__(dpdk_dev, up); ovs_mutex_unlock(&dpdk_dev->mutex); netdev_close(netdev); } else { unixctl_command_reply_error(conn, "Not a DPDK Interface"); netdev_close(netdev); return; } } else { struct netdev_dpdk *netdev; ovs_mutex_lock(&dpdk_mutex); LIST_FOR_EACH (netdev, list_node, &dpdk_list) { ovs_mutex_lock(&netdev->mutex); netdev_dpdk_set_admin_state__(netdev, up); ovs_mutex_unlock(&netdev->mutex); } ovs_mutex_unlock(&dpdk_mutex); } unixctl_command_reply(conn, "OK"); } /* * Set virtqueue flags so that we do not receive interrupts. */ static void set_irq_status(struct virtio_net *dev) { dev->virtqueue[VIRTIO_RXQ]->used->flags = VRING_USED_F_NO_NOTIFY; dev->virtqueue[VIRTIO_TXQ]->used->flags = VRING_USED_F_NO_NOTIFY; } /* * A new virtio-net device is added to a vhost port. */ static int new_device(struct virtio_net *dev) { struct netdev_dpdk *netdev; bool exists = false; ovs_mutex_lock(&dpdk_mutex); /* Add device to the vhost port with the same name as that passed down. */ LIST_FOR_EACH(netdev, list_node, &dpdk_list) { if (strncmp(dev->ifname, netdev->vhost_id, IF_NAME_SZ) == 0) { ovs_mutex_lock(&netdev->mutex); ovsrcu_set(&netdev->virtio_dev, dev); ovs_mutex_unlock(&netdev->mutex); exists = true; dev->flags |= VIRTIO_DEV_RUNNING; /* Disable notifications. */ set_irq_status(dev); break; } } ovs_mutex_unlock(&dpdk_mutex); if (!exists) { VLOG_INFO("vHost Device '%s' (%ld) can't be added - name not found", dev->ifname, dev->device_fh); return -1; } VLOG_INFO("vHost Device '%s' (%ld) has been added", dev->ifname, dev->device_fh); return 0; } /* * Remove a virtio-net device from the specific vhost port. Use dev->remove * flag to stop any more packets from being sent or received to/from a VM and * ensure all currently queued packets have been sent/received before removing * the device. */ static void destroy_device(volatile struct virtio_net *dev) { struct netdev_dpdk *vhost_dev; ovs_mutex_lock(&dpdk_mutex); LIST_FOR_EACH (vhost_dev, list_node, &dpdk_list) { if (netdev_dpdk_get_virtio(vhost_dev) == dev) { ovs_mutex_lock(&vhost_dev->mutex); dev->flags &= ~VIRTIO_DEV_RUNNING; ovsrcu_set(&vhost_dev->virtio_dev, NULL); ovs_mutex_unlock(&vhost_dev->mutex); /* * Wait for other threads to quiesce before * setting the virtio_dev to NULL. */ ovsrcu_synchronize(); /* * As call to ovsrcu_synchronize() will end the quiescent state, * put thread back into quiescent state before returning. */ ovsrcu_quiesce_start(); } } ovs_mutex_unlock(&dpdk_mutex); VLOG_INFO("vHost Device '%s' (%ld) has been removed", dev->ifname, dev->device_fh); } struct virtio_net * netdev_dpdk_get_virtio(const struct netdev_dpdk *dev) { return ovsrcu_get(struct virtio_net *, &dev->virtio_dev); } /* * These callbacks allow virtio-net devices to be added to vhost ports when * configuration has been fully complete. */ static const struct virtio_net_device_ops virtio_net_device_ops = { .new_device = new_device, .destroy_device = destroy_device, }; static void * start_vhost_loop(void *dummy OVS_UNUSED) { pthread_detach(pthread_self()); /* Put the cuse thread into quiescent state. */ ovsrcu_quiesce_start(); rte_vhost_driver_session_start(); return NULL; } static int dpdk_vhost_class_init(void) { rte_vhost_driver_callback_register(&virtio_net_device_ops); ovs_thread_create("vhost_thread", start_vhost_loop, NULL); return 0; } static int dpdk_vhost_cuse_class_init(void) { int err = -1; /* Register CUSE device to handle IOCTLs. * Unless otherwise specified on the vswitchd command line, cuse_dev_name * is set to vhost-net. */ err = rte_vhost_driver_register(cuse_dev_name); if (err != 0) { VLOG_ERR("CUSE device setup failure."); return -1; } dpdk_vhost_class_init(); return 0; } static int dpdk_vhost_user_class_init(void) { dpdk_vhost_class_init(); return 0; } static void dpdk_common_init(void) { unixctl_command_register("netdev-dpdk/set-admin-state", "[netdev] up|down", 1, 2, netdev_dpdk_set_admin_state, NULL); ovs_thread_create("dpdk_watchdog", dpdk_watchdog, NULL); } /* Client Rings */ static int dpdk_ring_create(const char dev_name[], unsigned int port_no, unsigned int *eth_port_id) { struct dpdk_ring *ivshmem; char ring_name[10]; int err; ivshmem = dpdk_rte_mzalloc(sizeof *ivshmem); if (ivshmem == NULL) { return ENOMEM; } /* XXX: Add support for multiquque ring. */ err = snprintf(ring_name, 10, "%s_tx", dev_name); if (err < 0) { return -err; } /* Create single consumer/producer rings, netdev does explicit locking. */ ivshmem->cring_tx = rte_ring_create(ring_name, DPDK_RING_SIZE, SOCKET0, RING_F_SP_ENQ | RING_F_SC_DEQ); if (ivshmem->cring_tx == NULL) { rte_free(ivshmem); return ENOMEM; } err = snprintf(ring_name, 10, "%s_rx", dev_name); if (err < 0) { return -err; } /* Create single consumer/producer rings, netdev does explicit locking. */ ivshmem->cring_rx = rte_ring_create(ring_name, DPDK_RING_SIZE, SOCKET0, RING_F_SP_ENQ | RING_F_SC_DEQ); if (ivshmem->cring_rx == NULL) { rte_free(ivshmem); return ENOMEM; } err = rte_eth_from_rings(dev_name, &ivshmem->cring_rx, 1, &ivshmem->cring_tx, 1, SOCKET0); if (err < 0) { rte_free(ivshmem); return ENODEV; } ivshmem->user_port_id = port_no; ivshmem->eth_port_id = rte_eth_dev_count() - 1; list_push_back(&dpdk_ring_list, &ivshmem->list_node); *eth_port_id = ivshmem->eth_port_id; return 0; } static int dpdk_ring_open(const char dev_name[], unsigned int *eth_port_id) OVS_REQUIRES(dpdk_mutex) { struct dpdk_ring *ivshmem; unsigned int port_no; int err = 0; /* Names always start with "dpdkr" */ err = dpdk_dev_parse_name(dev_name, "dpdkr", &port_no); if (err) { return err; } /* look through our list to find the device */ LIST_FOR_EACH (ivshmem, list_node, &dpdk_ring_list) { if (ivshmem->user_port_id == port_no) { VLOG_INFO("Found dpdk ring device %s:", dev_name); *eth_port_id = ivshmem->eth_port_id; /* really all that is needed */ return 0; } } /* Need to create the device rings */ return dpdk_ring_create(dev_name, port_no, eth_port_id); } static int netdev_dpdk_ring_send(struct netdev *netdev_, int qid, struct dp_packet **pkts, int cnt, bool may_steal) { struct netdev_dpdk *netdev = netdev_dpdk_cast(netdev_); unsigned i; /* When using 'dpdkr' and sending to a DPDK ring, we want to ensure that the * rss hash field is clear. This is because the same mbuf may be modified by * the consumer of the ring and return into the datapath without recalculating * the RSS hash. */ for (i = 0; i < cnt; i++) { dp_packet_set_rss_hash(pkts[i], 0); } netdev_dpdk_send__(netdev, qid, pkts, cnt, may_steal); return 0; } static int netdev_dpdk_ring_construct(struct netdev *netdev) { unsigned int port_no = 0; int err = 0; if (rte_eal_init_ret) { return rte_eal_init_ret; } ovs_mutex_lock(&dpdk_mutex); err = dpdk_ring_open(netdev->name, &port_no); if (err) { goto unlock_dpdk; } err = netdev_dpdk_init(netdev, port_no, DPDK_DEV_ETH); unlock_dpdk: ovs_mutex_unlock(&dpdk_mutex); return err; } #define NETDEV_DPDK_CLASS(NAME, INIT, CONSTRUCT, DESTRUCT, MULTIQ, SEND, \ GET_CARRIER, GET_STATS, GET_FEATURES, GET_STATUS, RXQ_RECV) \ { \ NAME, \ INIT, /* init */ \ NULL, /* netdev_dpdk_run */ \ NULL, /* netdev_dpdk_wait */ \ \ netdev_dpdk_alloc, \ CONSTRUCT, \ DESTRUCT, \ netdev_dpdk_dealloc, \ netdev_dpdk_get_config, \ NULL, /* netdev_dpdk_set_config */ \ NULL, /* get_tunnel_config */ \ NULL, /* build header */ \ NULL, /* push header */ \ NULL, /* pop header */ \ netdev_dpdk_get_numa_id, /* get_numa_id */ \ MULTIQ, /* set_multiq */ \ \ SEND, /* send */ \ NULL, /* send_wait */ \ \ netdev_dpdk_set_etheraddr, \ netdev_dpdk_get_etheraddr, \ netdev_dpdk_get_mtu, \ netdev_dpdk_set_mtu, \ netdev_dpdk_get_ifindex, \ GET_CARRIER, \ netdev_dpdk_get_carrier_resets, \ netdev_dpdk_set_miimon, \ GET_STATS, \ GET_FEATURES, \ NULL, /* set_advertisements */ \ \ NULL, /* set_policing */ \ NULL, /* get_qos_types */ \ NULL, /* get_qos_capabilities */ \ NULL, /* get_qos */ \ NULL, /* set_qos */ \ NULL, /* get_queue */ \ NULL, /* set_queue */ \ NULL, /* delete_queue */ \ NULL, /* get_queue_stats */ \ NULL, /* queue_dump_start */ \ NULL, /* queue_dump_next */ \ NULL, /* queue_dump_done */ \ NULL, /* dump_queue_stats */ \ \ NULL, /* get_in4 */ \ NULL, /* set_in4 */ \ NULL, /* get_in6 */ \ NULL, /* add_router */ \ NULL, /* get_next_hop */ \ GET_STATUS, \ NULL, /* arp_lookup */ \ \ netdev_dpdk_update_flags, \ \ netdev_dpdk_rxq_alloc, \ netdev_dpdk_rxq_construct, \ netdev_dpdk_rxq_destruct, \ netdev_dpdk_rxq_dealloc, \ RXQ_RECV, \ NULL, /* rx_wait */ \ NULL, /* rxq_drain */ \ } static int process_vhost_flags(char *flag, char *default_val, int size, char **argv, char **new_val) { int changed = 0; /* Depending on which version of vhost is in use, process the vhost-specific * flag if it is provided on the vswitchd command line, otherwise resort to * a default value. * * For vhost-user: Process "-cuse_dev_name" to set the custom location of * the vhost-user socket(s). * For vhost-cuse: Process "-vhost_sock_dir" to set the custom name of the * vhost-cuse character device. */ if (!strcmp(argv[1], flag) && (strlen(argv[2]) <= size)) { changed = 1; *new_val = strdup(argv[2]); VLOG_INFO("User-provided %s in use: %s", flag, *new_val); } else { VLOG_INFO("No %s provided - defaulting to %s", flag, default_val); *new_val = default_val; } return changed; } int dpdk_init(int argc, char **argv) { int result; int base = 0; char *pragram_name = argv[0]; if (argc < 2 || strcmp(argv[1], "--dpdk")) return 0; /* Remove the --dpdk argument from arg list.*/ argc--; argv++; #ifdef VHOST_CUSE if (process_vhost_flags("-cuse_dev_name", strdup("vhost-net"), PATH_MAX, argv, &cuse_dev_name)) { #else if (process_vhost_flags("-vhost_sock_dir", strdup(ovs_rundir()), NAME_MAX, argv, &vhost_sock_dir)) { struct stat s; int err; err = stat(vhost_sock_dir, &s); if (err) { VLOG_ERR("vHostUser socket DIR '%s' does not exist.", vhost_sock_dir); return err; } #endif /* Remove the vhost flag configuration parameters from the argument * list, so that the correct elements are passed to the DPDK * initialization function */ argc -= 2; argv += 2; /* Increment by two to bypass the vhost flag arguments */ base = 2; } /* Keep the program name argument as this is needed for call to * rte_eal_init() */ argv[0] = pragram_name; /* Make sure things are initialized ... */ result = rte_eal_init(argc, argv); if (result < 0) { ovs_abort(result, "Cannot init EAL"); } rte_memzone_dump(stdout); rte_eal_init_ret = 0; if (argc > result) { argv[result] = argv[0]; } /* We are called from the main thread here */ RTE_PER_LCORE(_lcore_id) = NON_PMD_CORE_ID; return result + 1 + base; } static const struct netdev_class dpdk_class = NETDEV_DPDK_CLASS( "dpdk", NULL, netdev_dpdk_construct, netdev_dpdk_destruct, netdev_dpdk_set_multiq, netdev_dpdk_eth_send, netdev_dpdk_get_carrier, netdev_dpdk_get_stats, netdev_dpdk_get_features, netdev_dpdk_get_status, netdev_dpdk_rxq_recv); static const struct netdev_class dpdk_ring_class = NETDEV_DPDK_CLASS( "dpdkr", NULL, netdev_dpdk_ring_construct, netdev_dpdk_destruct, netdev_dpdk_set_multiq, netdev_dpdk_ring_send, netdev_dpdk_get_carrier, netdev_dpdk_get_stats, netdev_dpdk_get_features, netdev_dpdk_get_status, netdev_dpdk_rxq_recv); static const struct netdev_class OVS_UNUSED dpdk_vhost_cuse_class = NETDEV_DPDK_CLASS( "dpdkvhostcuse", dpdk_vhost_cuse_class_init, netdev_dpdk_vhost_cuse_construct, netdev_dpdk_vhost_destruct, netdev_dpdk_vhost_set_multiq, netdev_dpdk_vhost_send, netdev_dpdk_vhost_get_carrier, netdev_dpdk_vhost_get_stats, NULL, NULL, netdev_dpdk_vhost_rxq_recv); static const struct netdev_class OVS_UNUSED dpdk_vhost_user_class = NETDEV_DPDK_CLASS( "dpdkvhostuser", dpdk_vhost_user_class_init, netdev_dpdk_vhost_user_construct, netdev_dpdk_vhost_destruct, netdev_dpdk_vhost_set_multiq, netdev_dpdk_vhost_send, netdev_dpdk_vhost_get_carrier, netdev_dpdk_vhost_get_stats, NULL, NULL, netdev_dpdk_vhost_rxq_recv); void netdev_dpdk_register(void) { static struct ovsthread_once once = OVSTHREAD_ONCE_INITIALIZER; if (rte_eal_init_ret) { return; } if (ovsthread_once_start(&once)) { dpdk_common_init(); netdev_register_provider(&dpdk_class); netdev_register_provider(&dpdk_ring_class); #ifdef VHOST_CUSE netdev_register_provider(&dpdk_vhost_cuse_class); #else netdev_register_provider(&dpdk_vhost_user_class); #endif ovsthread_once_done(&once); } } int pmd_thread_setaffinity_cpu(unsigned cpu) { cpu_set_t cpuset; int err; CPU_ZERO(&cpuset); CPU_SET(cpu, &cpuset); err = pthread_setaffinity_np(pthread_self(), sizeof(cpu_set_t), &cpuset); if (err) { VLOG_ERR("Thread affinity error %d",err); return err; } /* NON_PMD_CORE_ID is reserved for use by non pmd threads. */ ovs_assert(cpu != NON_PMD_CORE_ID); RTE_PER_LCORE(_lcore_id) = cpu; return 0; } static bool thread_is_pmd(void) { return rte_lcore_id() != NON_PMD_CORE_ID; }