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ovs/lib/netdev-dpdk.c
Pravin B Shelar a36de779d7 openvswitch: Userspace tunneling. 
Following patch adds support for userspace tunneling. Tunneling
needs three more component first is routing table which is configured by
caching kernel routes and second is ARP cache which build automatically
by snooping arp. And third is tunnel protocol table which list all
listening protocols which is populated by vswitchd as tunnel ports
are added. GRE and VXLAN protocol support is added in this patch.

Tunneling works as follows:
On packet receive vswitchd check if this packet is targeted to tunnel
port. If it is then vswitchd inserts tunnel pop action which pops
header and sends packet to tunnel port.
On packet xmit rather than generating Set tunnel action it generate
tunnel push action which has tunnel header data. datapath can use
tunnel-push action data to generate header for each packet and
forward this packet to output port. Since tunnel-push action
contains most of packet header vswitchd needs to lookup routing
table and arp table to build this action.

Signed-off-by: Pravin B Shelar <pshelar@nicira.com>
Acked-by: Jarno Rajahalme <jrajahalme@nicira.com>
Acked-by: Thomas Graf <tgraf@noironetworks.com>
Acked-by: Ben Pfaff <blp@nicira.com>
2014-11-12 15:08:33 -08:00

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/*
* 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 <config.h>
#include <stdio.h>
#include <string.h>
#include <signal.h>
#include <stdlib.h>
#include <pthread.h>
#include <config.h>
#include <errno.h>
#include <sched.h>
#include <stdlib.h>
#include <unistd.h>
#include <stdio.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 "ofpbuf.h"
#include "ovs-numa.h"
#include "ovs-thread.h"
#include "ovs-rcu.h"
#include "packet-dpif.h"
#include "packets.h"
#include "shash.h"
#include "sset.h"
#include "unaligned.h"
#include "timeval.h"
#include "unixctl.h"
#include "vlog.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)
/* XXX: mempool size should be based on system resources. */
#define NB_MBUF (4096 * 64)
#define MP_CACHE_SZ (256 * 2)
#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)*/
/* XXX: Needs per NIC value for these constants. */
#define RX_PTHRESH 32 /* Default values of RX prefetch threshold reg. */
#define RX_HTHRESH 32 /* Default values of RX host threshold reg. */
#define RX_WTHRESH 16 /* Default values of RX write-back threshold reg. */
#define TX_PTHRESH 36 /* Default values of TX prefetch threshold reg. */
#define TX_HTHRESH 0 /* Default values of TX host threshold reg. */
#define TX_WTHRESH 0 /* Default values of TX write-back threshold reg. */
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_IPV4_TCP | ETH_RSS_IPV4 | ETH_RSS_IPV6
| ETH_RSS_IPV4_UDP | ETH_RSS_IPV6_TCP | ETH_RSS_IPV6_UDP,
},
},
.txmode = {
.mq_mode = ETH_MQ_TX_NONE,
},
};
static const struct rte_eth_rxconf rx_conf = {
.rx_thresh = {
.pthresh = RX_PTHRESH,
.hthresh = RX_HTHRESH,
.wthresh = RX_WTHRESH,
},
};
static const struct rte_eth_txconf tx_conf = {
.tx_thresh = {
.pthresh = TX_PTHRESH,
.hthresh = TX_HTHRESH,
.wthresh = TX_WTHRESH,
},
.tx_free_thresh = 0,
.tx_rs_thresh = 0,
.txq_flags = ETH_TXQ_FLAGS_NOMULTSEGS|ETH_TXQ_FLAGS_NOOFFLOADS,
};
enum { MAX_RX_QUEUE_LEN = 192 };
enum { MAX_TX_QUEUE_LEN = 384 };
enum { DPDK_RING_SIZE = 256 };
BUILD_ASSERT_DECL(IS_POW2(DPDK_RING_SIZE));
enum { DRAIN_TSC = 200000ULL };
static int rte_eal_init_ret = ENODEV;
static struct ovs_mutex dpdk_mutex = OVS_MUTEX_INITIALIZER;
/* Contains all 'struct dpdk_dev's. */
static struct list dpdk_list OVS_GUARDED_BY(dpdk_mutex)
= LIST_INITIALIZER(&dpdk_list);
static struct list dpdk_mp_list OVS_GUARDED_BY(dpdk_mutex)
= 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 */
struct ovs_mutex nonpmd_mempool_mutex = OVS_MUTEX_INITIALIZER;
struct dpdk_mp {
struct rte_mempool *mp;
int mtu;
int socket_id;
int refcount;
struct 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;
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 list dpdk_ring_list OVS_GUARDED_BY(dpdk_mutex)
= 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 list list_node OVS_GUARDED_BY(dpdk_mutex);
};
struct netdev_dpdk {
struct netdev up;
int port_id;
int max_packet_len;
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;
uint8_t hwaddr[ETH_ADDR_LEN];
enum netdev_flags flags;
struct rte_eth_link link;
int link_reset_cnt;
/* In dpdk_list. */
struct list list_node OVS_GUARDED_BY(dpdk_mutex);
rte_spinlock_t dpdkr_tx_lock;
};
struct netdev_rxq_dpdk {
struct netdev_rxq up;
int port_id;
};
static bool thread_is_pmd(void);
static int netdev_dpdk_construct(struct netdev *);
static bool
is_dpdk_class(const struct netdev_class *class)
{
return class->construct == netdev_dpdk_construct;
}
/* XXX: use dpdk malloc for entire OVS. infact huge page shld be used
* for all other sengments 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 dpif_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 dpif_packet);
RTE_MBUF_ASSERT(mp->elt_size >= sizeof(struct dpif_packet));
memset(m, 0, mp->elt_size);
/* start of buffer is just after mbuf structure */
m->buf_addr = (char *)m + sizeof(struct dpif_packet);
m->buf_physaddr = rte_mempool_virt2phy(mp, m) +
sizeof(struct dpif_packet);
m->buf_len = (uint16_t)buf_len;
/* keep some headroom between start of buffer and data */
m->pkt.data = (char*) m->buf_addr + RTE_MIN(RTE_PKTMBUF_HEADROOM, m->buf_len);
/* init some constant fields */
m->type = RTE_MBUF_PKT;
m->pool = mp;
m->pkt.nb_segs = 1;
m->pkt.in_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);
ofpbuf_init_dpdk((struct ofpbuf *) 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];
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;
if (snprintf(mp_name, RTE_MEMPOOL_NAMESIZE, "ovs_mp_%d_%d", dmp->mtu,
dmp->socket_id) < 0) {
return NULL;
}
dmp->mp = rte_mempool_create(mp_name, NB_MBUF, 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);
if (dmp->mp == NULL) {
return NULL;
}
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_init(struct netdev_dpdk *dev) OVS_REQUIRES(dpdk_mutex)
{
struct rte_pktmbuf_pool_private *mbp_priv;
struct ether_addr eth_addr;
int diag;
int i;
if (dev->port_id < 0 || dev->port_id >= rte_eth_dev_count()) {
return ENODEV;
}
diag = rte_eth_dev_configure(dev->port_id, dev->up.n_rxq, dev->up.n_txq,
&port_conf);
if (diag) {
VLOG_ERR("eth dev config error %d",diag);
return -diag;
}
for (i = 0; i < dev->up.n_txq; i++) {
diag = rte_eth_tx_queue_setup(dev->port_id, i, NIC_PORT_TX_Q_SIZE,
dev->socket_id, &tx_conf);
if (diag) {
VLOG_ERR("eth dev tx queue setup error %d",diag);
return -diag;
}
}
for (i = 0; i < dev->up.n_rxq; i++) {
diag = rte_eth_rx_queue_setup(dev->port_id, i, NIC_PORT_RX_Q_SIZE,
dev->socket_id,
&rx_conf, dev->dpdk_mp->mp);
if (diag) {
VLOG_ERR("eth dev rx queue setup error %d",diag);
return -diag;
}
}
diag = rte_eth_dev_start(dev->port_id);
if (diag) {
VLOG_ERR("eth dev start error %d",diag);
return -diag;
}
rte_eth_promiscuous_enable(dev->port_id);
rte_eth_allmulticast_enable(dev->port_id);
memset(&eth_addr, 0x0, sizeof(eth_addr));
rte_eth_macaddr_get(dev->port_id, &eth_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)
{
int i;
netdev->tx_q = dpdk_rte_mzalloc(n_txqs * sizeof *netdev->tx_q);
/* Each index is considered as a cpu core id, since there should
* be one tx queue for each cpu core. */
for (i = 0; i < n_txqs; i++) {
int numa_id = ovs_numa_get_numa_id(i);
/* 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;
}
}
static int
netdev_dpdk_init(struct netdev *netdev_, unsigned int port_no)
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);
/* If the 'sid' is negative, it means that the kernel fails
* to obtain the pci numa info. In that situation, always
* use 'SOCKET0'. */
sid = rte_eth_dev_socket_id(port_no);
netdev->socket_id = sid < 0 ? SOCKET0 : sid;
netdev_dpdk_alloc_txq(netdev, NR_QUEUE);
netdev->port_id = port_no;
netdev->flags = 0;
netdev->mtu = ETHER_MTU;
netdev->max_packet_len = MTU_TO_MAX_LEN(netdev->mtu);
rte_spinlock_init(&netdev->dpdkr_tx_lock);
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;
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, 0, 0); /* string must be null terminated */
return 0;
}
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);
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);
ovs_mutex_destroy(&dev->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, "configured_tx_queues", "%d", netdev_->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;
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);
netdev->up.n_txq = n_txq;
netdev->up.n_rxq = n_rxq;
rte_free(netdev->tx_q);
netdev_dpdk_alloc_txq(netdev, n_txq);
err = dpdk_eth_dev_init(netdev);
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]);
}
ovs_mutex_lock(&dev->mutex);
dev->stats.tx_dropped += txq->count-nb_tx;
ovs_mutex_unlock(&dev->mutex);
}
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 int
netdev_dpdk_rxq_recv(struct netdev_rxq *rxq_, struct dpif_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
* queueus. */
if (rxq_->queue_id == rte_lcore_id()) {
dpdk_queue_flush(dev, rxq_->queue_id);
}
nb_rx = rte_eth_rx_burst(rx->port_id, rxq_->queue_id,
(struct rte_mbuf **) packets,
MIN((int)NETDEV_MAX_RX_BATCH,
(int)MAX_RX_QUEUE_LEN));
if (!nb_rx) {
return EAGAIN;
}
*c = nb_rx;
return 0;
}
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 dpif_packet ** pkts,
int cnt)
OVS_NO_THREAD_SAFETY_ANALYSIS
{
struct netdev_dpdk *dev = netdev_dpdk_cast(netdev);
struct rte_mbuf *mbufs[cnt];
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 = ofpbuf_size(&pkts[i]->ofpbuf);
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(mbufs[newcnt]->pkt.data, ofpbuf_data(&pkts[i]->ofpbuf), size);
rte_pktmbuf_data_len(mbufs[newcnt]) = size;
rte_pktmbuf_pkt_len(mbufs[newcnt]) = size;
newcnt++;
}
if (OVS_UNLIKELY(dropped)) {
ovs_mutex_lock(&dev->mutex);
dev->stats.tx_dropped += dropped;
ovs_mutex_unlock(&dev->mutex);
}
dpdk_queue_pkts(dev, qid, mbufs, newcnt);
dpdk_queue_flush(dev, qid);
if (!thread_is_pmd()) {
ovs_mutex_unlock(&nonpmd_mempool_mutex);
}
}
static inline void
netdev_dpdk_send__(struct netdev_dpdk *dev, int qid,
struct dpif_packet **pkts, int cnt, bool may_steal)
{
int i;
if (OVS_UNLIKELY(!may_steal ||
pkts[0]->ofpbuf.source != OFPBUF_DPDK)) {
struct netdev *netdev = &dev->up;
dpdk_do_tx_copy(netdev, qid, pkts, cnt);
if (may_steal) {
for (i = 0; i < cnt; i++) {
dpif_packet_delete(pkts[i]);
}
}
} else {
int next_tx_idx = 0;
int dropped = 0;
for (i = 0; i < cnt; i++) {
int size = ofpbuf_size(&pkts[i]->ofpbuf);
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);
dpif_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)) {
ovs_mutex_lock(&dev->mutex);
dev->stats.tx_dropped += dropped;
ovs_mutex_unlock(&dev->mutex);
}
}
}
static int
netdev_dpdk_eth_send(struct netdev *netdev, int qid,
struct dpif_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_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;
stats->tx_dropped = dev->stats.tx_dropped;
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 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 0;
}
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->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");
}
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);
}
static int
dpdk_class_init(void)
{
int result;
result = rte_eal_pci_probe();
if (result) {
VLOG_ERR("Cannot probe PCI");
return -result;
}
VLOG_INFO("Ethernet Device Count: %d", (int)rte_eth_dev_count());
return 0;
}
/* 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:\n", 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 OVS_UNUSED,
struct dpif_packet **pkts, int cnt, bool may_steal)
{
struct netdev_dpdk *dev = netdev_dpdk_cast(netdev);
/* DPDK Rings have a single TX queue, Therefore needs locking. */
rte_spinlock_lock(&dev->dpdkr_tx_lock);
netdev_dpdk_send__(dev, 0, pkts, cnt, may_steal);
rte_spinlock_unlock(&dev->dpdkr_tx_lock);
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);
unlock_dpdk:
ovs_mutex_unlock(&dpdk_mutex);
return err;
}
#define NETDEV_DPDK_CLASS(NAME, INIT, CONSTRUCT, MULTIQ, SEND) \
{ \
NAME, \
INIT, /* init */ \
NULL, /* netdev_dpdk_run */ \
NULL, /* netdev_dpdk_wait */ \
\
netdev_dpdk_alloc, \
CONSTRUCT, \
netdev_dpdk_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, \
netdev_dpdk_get_carrier, \
netdev_dpdk_get_carrier_resets, \
netdev_dpdk_set_miimon, \
netdev_dpdk_get_stats, \
netdev_dpdk_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 */ \
netdev_dpdk_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, \
netdev_dpdk_rxq_recv, \
NULL, /* rx_wait */ \
NULL, /* rxq_drain */ \
}
int
dpdk_init(int argc, char **argv)
{
int result;
if (argc < 2 || strcmp(argv[1], "--dpdk"))
return 0;
/* Make sure program name passed to rte_eal_init() is vswitchd. */
argv[1] = argv[0];
argc--;
argv++;
/* Make sure things are initialized ... */
result = rte_eal_init(argc, argv);
if (result < 0) {
ovs_abort(result, "Cannot init EAL\n");
}
rte_memzone_dump(stdout);
rte_eal_init_ret = 0;
if (argc > result) {
argv[result] = argv[0];
}
/* We are called from the main thread here */
thread_set_nonpmd();
return result + 1;
}
const struct netdev_class dpdk_class =
NETDEV_DPDK_CLASS(
"dpdk",
dpdk_class_init,
netdev_dpdk_construct,
netdev_dpdk_set_multiq,
netdev_dpdk_eth_send);
const struct netdev_class dpdk_ring_class =
NETDEV_DPDK_CLASS(
"dpdkr",
NULL,
netdev_dpdk_ring_construct,
NULL,
netdev_dpdk_ring_send);
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);
ovsthread_once_done(&once);
}
}
int
pmd_thread_setaffinity_cpu(int 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;
}
/* lcore_id 0 is reseved for use by non pmd threads. */
ovs_assert(cpu);
RTE_PER_LCORE(_lcore_id) = cpu;
return 0;
}
void
thread_set_nonpmd(void)
{
/* We have to use 0 to allow non pmd threads to perform certain DPDK
* operations, like rte_eth_dev_configure(). */
RTE_PER_LCORE(_lcore_id) = 0;
}
static bool
thread_is_pmd(void)
{
return rte_lcore_id() != 0;
}
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