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ovs/lib/netdev-dpdk.c
Terry Wilson ee89ea7b47 json: Move from lib to include/openvswitch. 
To easily allow both in- and out-of-tree building of the Python
wrapper for the OVS JSON parser (e.g. w/ pip), move json.h to
include/openvswitch. This also requires moving lib/{hmap,shash}.h.

Both hmap.h and shash.h were #include-ing "util.h" even though the
headers themselves did not use anything from there, but rather from
include/openvswitch/util.h. Fixing that required including util.h
in several C files mostly due to OVS_NOT_REACHED and things like
xmalloc.

Signed-off-by: Terry Wilson <twilson@redhat.com>
Signed-off-by: Ben Pfaff <blp@ovn.org>
2016-07-22 17:09:17 -07:00

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/*
* Copyright (c) 2014, 2015, 2016 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 <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 <sys/stat.h>
#include <stdio.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <getopt.h>
#include <numaif.h>
#include "dirs.h"
#include "dp-packet.h"
#include "dpif-netdev.h"
#include "fatal-signal.h"
#include "netdev-dpdk.h"
#include "netdev-provider.h"
#include "netdev-vport.h"
#include "odp-util.h"
#include "openvswitch/dynamic-string.h"
#include "openvswitch/list.h"
#include "openvswitch/ofp-print.h"
#include "openvswitch/vlog.h"
#include "ovs-numa.h"
#include "ovs-thread.h"
#include "ovs-rcu.h"
#include "packets.h"
#include "openvswitch/shash.h"
#include "smap.h"
#include "sset.h"
#include "unaligned.h"
#include "timeval.h"
#include "unixctl.h"
#include "rte_config.h"
#include "rte_mbuf.h"
#include "rte_meter.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.
* The minimum mbuf size is limited to avoid scatter behaviour and drop in
* performance for standard Ethernet MTU.
*/
#define ETHER_HDR_MAX_LEN (ETHER_HDR_LEN + ETHER_CRC_LEN + (2 * VLAN_HEADER_LEN))
#define MTU_TO_FRAME_LEN(mtu) ((mtu) + ETHER_HDR_LEN + ETHER_CRC_LEN)
#define MTU_TO_MAX_FRAME_LEN(mtu) ((mtu) + ETHER_HDR_MAX_LEN)
#define FRAME_LEN_TO_MTU(frame_len) ((frame_len)- ETHER_HDR_LEN - ETHER_CRC_LEN)
#define MBUF_SIZE(mtu) ( MTU_TO_MAX_FRAME_LEN(mtu) \
+ sizeof(struct dp_packet) \
+ RTE_PKTMBUF_HEADROOM)
#define NETDEV_DPDK_MBUF_ALIGN 1024
/* 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);
/*
* DPDK XSTATS Counter names definition
*/
#define XSTAT_RX_64_PACKETS "rx_size_64_packets"
#define XSTAT_RX_65_TO_127_PACKETS "rx_size_65_to_127_packets"
#define XSTAT_RX_128_TO_255_PACKETS "rx_size_128_to_255_packets"
#define XSTAT_RX_256_TO_511_PACKETS "rx_size_256_to_511_packets"
#define XSTAT_RX_512_TO_1023_PACKETS "rx_size_512_to_1023_packets"
#define XSTAT_RX_1024_TO_1522_PACKETS "rx_size_1024_to_1522_packets"
#define XSTAT_RX_1523_TO_MAX_PACKETS "rx_size_1523_to_max_packets"
#define XSTAT_TX_64_PACKETS "tx_size_64_packets"
#define XSTAT_TX_65_TO_127_PACKETS "tx_size_65_to_127_packets"
#define XSTAT_TX_128_TO_255_PACKETS "tx_size_128_to_255_packets"
#define XSTAT_TX_256_TO_511_PACKETS "tx_size_256_to_511_packets"
#define XSTAT_TX_512_TO_1023_PACKETS "tx_size_512_to_1023_packets"
#define XSTAT_TX_1024_TO_1522_PACKETS "tx_size_1024_to_1522_packets"
#define XSTAT_TX_1523_TO_MAX_PACKETS "tx_size_1523_to_max_packets"
#define XSTAT_TX_MULTICAST_PACKETS "tx_multicast_packets"
#define XSTAT_RX_BROADCAST_PACKETS "rx_broadcast_packets"
#define XSTAT_TX_BROADCAST_PACKETS "tx_broadcast_packets"
#define XSTAT_RX_UNDERSIZED_ERRORS "rx_undersized_errors"
#define XSTAT_RX_OVERSIZE_ERRORS "rx_oversize_errors"
#define XSTAT_RX_FRAGMENTED_ERRORS "rx_fragmented_errors"
#define XSTAT_RX_JABBER_ERRORS "rx_jabber_errors"
#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)*/
#define OVS_VHOST_MAX_QUEUE_NUM 1024 /* Maximum number of vHost TX queues. */
#define OVS_VHOST_QUEUE_MAP_UNKNOWN (-1) /* Mapping not initialized. */
#define OVS_VHOST_QUEUE_DISABLED (-2) /* Queue was disabled by guest and not
* yet mapped to another queue. */
#ifdef VHOST_CUSE
static char *cuse_dev_name = NULL; /* Character device cuse_dev_name. */
#endif
static char *vhost_sock_dir = NULL; /* Location of vhost-user sockets */
#define VHOST_ENQ_RETRY_NUM 8
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 { 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;
/* Quality of Service */
/* An instance of a QoS configuration. Always associated with a particular
* network device.
*
* Each QoS implementation subclasses this with whatever additional data it
* needs.
*/
struct qos_conf {
const struct dpdk_qos_ops *ops;
};
/* A particular implementation of dpdk QoS operations.
*
* The functions below return 0 if successful or a positive errno value on
* failure, except where otherwise noted. All of them must be provided, except
* where otherwise noted.
*/
struct dpdk_qos_ops {
/* Name of the QoS type */
const char *qos_name;
/* Called to construct the QoS implementation on 'netdev'. The
* implementation should make the appropriate calls to configure QoS
* according to 'details'. The implementation may assume that any current
* QoS configuration already installed should be destroyed before
* constructing the new configuration.
*
* The contents of 'details' should be documented as valid for 'ovs_name'
* in the "other_config" column in the "QoS" table in vswitchd/vswitch.xml
* (which is built as ovs-vswitchd.conf.db(8)).
*
* This function must return 0 if and only if it sets 'netdev->qos_conf'
* to an initialized 'struct qos_conf'.
*
* For all QoS implementations it should always be non-null.
*/
int (*qos_construct)(struct netdev *netdev, const struct smap *details);
/* Destroys the data structures allocated by the implementation as part of
* 'qos_conf.
*
* For all QoS implementations it should always be non-null.
*/
void (*qos_destruct)(struct netdev *netdev, struct qos_conf *conf);
/* Retrieves details of 'netdev->qos_conf' configuration into 'details'.
*
* The contents of 'details' should be documented as valid for 'ovs_name'
* in the "other_config" column in the "QoS" table in vswitchd/vswitch.xml
* (which is built as ovs-vswitchd.conf.db(8)).
*/
int (*qos_get)(const struct netdev *netdev, struct smap *details);
/* Reconfigures 'netdev->qos_conf' according to 'details', performing any
* required calls to complete the reconfiguration.
*
* The contents of 'details' should be documented as valid for 'ovs_name'
* in the "other_config" column in the "QoS" table in vswitchd/vswitch.xml
* (which is built as ovs-vswitchd.conf.db(8)).
*
* This function may be null if 'qos_conf' is not configurable.
*/
int (*qos_set)(struct netdev *netdev, const struct smap *details);
/* Modify an array of rte_mbufs. The modification is specific to
* each qos implementation.
*
* The function should take and array of mbufs and an int representing
* the current number of mbufs present in the array.
*
* After the function has performed a qos modification to the array of
* mbufs it returns an int representing the number of mbufs now present in
* the array. This value is can then be passed to the port send function
* along with the modified array for transmission.
*
* For all QoS implementations it should always be non-null.
*/
int (*qos_run)(struct netdev *netdev, struct rte_mbuf **pkts,
int pkt_cnt);
};
/* dpdk_qos_ops for each type of user space QoS implementation */
static const struct dpdk_qos_ops egress_policer_ops;
/*
* Array of dpdk_qos_ops, contains pointer to all supported QoS
* operations.
*/
static const struct dpdk_qos_ops *const qos_confs[] = {
&egress_policer_ops,
NULL
};
/* 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. */
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 {
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'). */
int map; /* Mapping of configured vhost-user queues
* to enabled by guest. */
};
/* 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;
unsigned 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 ingress_policer {
struct rte_meter_srtcm_params app_srtcm_params;
struct rte_meter_srtcm in_policer;
rte_spinlock_t policer_lock;
};
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;
struct eth_addr hwaddr;
enum netdev_flags flags;
struct rte_eth_link link;
int link_reset_cnt;
/* Caller of netdev_send() might want to use more txqs than the device has.
* For physical NICs, if the 'requested_n_txq' less or equal to 'up.n_txq',
* 'txq_needs_locking' is false, otherwise it is true and we will take a
* spinlock on transmission. For vhost devices, 'requested_n_txq' is
* always true. */
bool txq_needs_locking;
/* 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);
/* QoS configuration and lock for the device */
struct qos_conf *qos_conf;
rte_spinlock_t qos_lock;
/* The following properties cannot be changed when a device is running,
* so we remember the request and update them next time
* netdev_dpdk*_reconfigure() is called */
int requested_n_txq;
int requested_n_rxq;
/* Socket ID detected when vHost device is brought up */
int requested_socket_id;
/* Ingress Policer */
OVSRCU_TYPE(struct ingress_policer *) ingress_policer;
uint32_t policer_rate;
uint32_t policer_burst;
};
struct netdev_rxq_dpdk {
struct netdev_rxq up;
int port_id;
};
static bool dpdk_thread_is_pmd(void);
static int netdev_dpdk_construct(struct netdev *);
struct virtio_net * netdev_dpdk_get_virtio(const struct netdev_dpdk *dev);
struct ingress_policer *
netdev_dpdk_get_ingress_policer(const struct netdev_dpdk *dev);
static bool
is_dpdk_class(const struct netdev_class *class)
{
return class->construct == netdev_dpdk_construct;
}
/* DPDK NIC drivers allocate RX buffers at a particular granularity, typically
* aligned at 1k or less. If a declared mbuf size is not a multiple of this
* value, insufficient buffers are allocated to accomodate the packet in its
* entirety. Furthermore, certain drivers need to ensure that there is also
* sufficient space in the Rx buffer to accommodate two VLAN tags (for QinQ
* frames). If the RX buffer is too small, then the driver enables scatter RX
* behaviour, which reduces performance. To prevent this, use a buffer size that
* is closest to 'mtu', but which satisfies the aforementioned criteria.
*/
static uint32_t
dpdk_buf_size(int mtu)
{
return ROUND_UP((MTU_TO_MAX_FRAME_LEN(mtu) + RTE_PKTMBUF_HEADROOM),
NETDEV_DPDK_MBUF_ALIGN);
}
/* 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(pkt);
}
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;
struct rte_pktmbuf_pool_private mbp_priv;
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;
mbp_priv.mbuf_data_room_size = MBUF_SIZE(mtu) - sizeof(struct dp_packet);
mbp_priv.mbuf_priv_size = sizeof (struct dp_packet) -
sizeof (struct rte_mbuf);
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, &mbp_priv,
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 );
}
ovs_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);
if (dev->type == DPDK_DEV_ETH) {
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->up.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(&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_BYTES_ARGS(eth_addr.addr_bytes));
memcpy(dev->hwaddr.ea, 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 *dev;
if (!rte_eal_init_ret) { /* Only after successful initialization */
dev = dpdk_rte_mzalloc(sizeof *dev);
if (dev) {
return &dev->up;
}
}
return NULL;
}
static void
netdev_dpdk_alloc_txq(struct netdev_dpdk *dev, unsigned int n_txqs)
{
unsigned i;
dev->tx_q = dpdk_rte_mzalloc(n_txqs * sizeof *dev->tx_q);
for (i = 0; i < n_txqs; i++) {
/* Initialize map for vhost devices. */
dev->tx_q[i].map = OVS_VHOST_QUEUE_MAP_UNKNOWN;
rte_spinlock_init(&dev->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 *dev = netdev_dpdk_cast(netdev);
int sid;
int err = 0;
uint32_t buf_size;
ovs_mutex_init(&dev->mutex);
ovs_mutex_lock(&dev->mutex);
rte_spinlock_init(&dev->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());
}
dev->socket_id = sid < 0 ? SOCKET0 : sid;
dev->requested_socket_id = dev->socket_id;
dev->port_id = port_no;
dev->type = type;
dev->flags = 0;
dev->mtu = ETHER_MTU;
dev->max_packet_len = MTU_TO_FRAME_LEN(dev->mtu);
buf_size = dpdk_buf_size(dev->mtu);
dev->dpdk_mp = dpdk_mp_get(dev->socket_id, FRAME_LEN_TO_MTU(buf_size));
if (!dev->dpdk_mp) {
err = ENOMEM;
goto unlock;
}
/* Initialise QoS configuration to NULL and qos lock to unlocked */
dev->qos_conf = NULL;
rte_spinlock_init(&dev->qos_lock);
/* Initialise rcu pointer for ingress policer to NULL */
ovsrcu_init(&dev->ingress_policer, NULL);
dev->policer_rate = 0;
dev->policer_burst = 0;
netdev->n_rxq = NR_QUEUE;
netdev->n_txq = NR_QUEUE;
dev->requested_n_rxq = netdev->n_rxq;
dev->requested_n_txq = netdev->n_txq;
if (type == DPDK_DEV_ETH) {
err = dpdk_eth_dev_init(dev);
if (err) {
goto unlock;
}
netdev_dpdk_alloc_txq(dev, netdev->n_txq);
dev->txq_needs_locking = netdev->n_txq < dev->requested_n_txq;
} else {
netdev_dpdk_alloc_txq(dev, OVS_VHOST_MAX_QUEUE_NUM);
dev->txq_needs_locking = true;
/* Enable DPDK_DEV_VHOST device and set promiscuous mode flag. */
dev->flags = NETDEV_UP | NETDEV_PROMISC;
}
ovs_list_push_back(&dpdk_list, &dev->list_node);
unlock:
ovs_mutex_unlock(&dev->mutex);
return err;
}
/* dev_name must be the prefix followed by a positive decimal number.
* (no leading + or - signs are allowed) */
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);
if (str_to_uint(cport, 10, port_no)) {
return 0;
} else {
return ENODEV;
}
}
static int
vhost_construct_helper(struct netdev *netdev) OVS_REQUIRES(dpdk_mutex)
{
if (rte_eal_init_ret) {
return rte_eal_init_ret;
}
return netdev_dpdk_init(netdev, -1, DPDK_DEV_VHOST);
}
static int
netdev_dpdk_vhost_cuse_construct(struct netdev *netdev)
{
struct netdev_dpdk *dev = netdev_dpdk_cast(netdev);
int err;
if (rte_eal_init_ret) {
return rte_eal_init_ret;
}
ovs_mutex_lock(&dpdk_mutex);
strncpy(dev->vhost_id, netdev->name, sizeof(dev->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 *dev = netdev_dpdk_cast(netdev);
const char *name = netdev->name;
int err;
/* 'name' is appended to 'vhost_sock_dir' and used to create a socket in
* the file system. '/' or '\' would traverse directories, so they're not
* acceptable in 'name'. */
if (strchr(name, '/') || strchr(name, '\\')) {
VLOG_ERR("\"%s\" is not a valid name for a vhost-user port. "
"A valid name must not include '/' or '\\'",
name);
return EINVAL;
}
if (rte_eal_init_ret) {
return rte_eal_init_ret;
}
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(dev->vhost_id, sizeof(dev->vhost_id), "%s/%s",
vhost_sock_dir, name);
err = rte_vhost_driver_register(dev->vhost_id);
if (err) {
VLOG_ERR("vhost-user socket device setup failure for socket %s\n",
dev->vhost_id);
} else {
fatal_signal_add_file_to_unlink(dev->vhost_id);
VLOG_INFO("Socket %s created for vhost-user port %s\n",
dev->vhost_id, 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);
free(ovsrcu_get_protected(struct ingress_policer *,
&dev->ingress_policer));
ovs_mutex_unlock(&dev->mutex);
ovs_mutex_lock(&dpdk_mutex);
rte_free(dev->tx_q);
ovs_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);
/* Guest becomes an orphan if still attached. */
if (netdev_dpdk_get_virtio(dev) != NULL) {
VLOG_ERR("Removing port '%s' while vhost device still attached.",
netdev->name);
VLOG_ERR("To restore connectivity after re-adding of port, VM on socket"
" '%s' must be restarted.",
dev->vhost_id);
}
if (rte_vhost_driver_unregister(dev->vhost_id)) {
VLOG_ERR("Unable to remove vhost-user socket %s", dev->vhost_id);
} else {
fatal_signal_remove_file_to_unlink(dev->vhost_id);
}
ovs_mutex_lock(&dev->mutex);
free(ovsrcu_get_protected(struct ingress_policer *,
&dev->ingress_policer));
ovs_mutex_unlock(&dev->mutex);
ovs_mutex_lock(&dpdk_mutex);
rte_free(dev->tx_q);
ovs_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 *dev = netdev_dpdk_cast(netdev);
rte_free(dev);
}
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, "requested_rx_queues", "%d", dev->requested_n_rxq);
smap_add_format(args, "configured_rx_queues", "%d", netdev->n_rxq);
smap_add_format(args, "requested_tx_queues", "%d", dev->requested_n_txq);
smap_add_format(args, "configured_tx_queues", "%d", netdev->n_txq);
ovs_mutex_unlock(&dev->mutex);
return 0;
}
static int
netdev_dpdk_set_config(struct netdev *netdev, const struct smap *args)
{
struct netdev_dpdk *dev = netdev_dpdk_cast(netdev);
int new_n_rxq;
ovs_mutex_lock(&dev->mutex);
new_n_rxq = MAX(smap_get_int(args, "n_rxq", dev->requested_n_rxq), 1);
if (new_n_rxq != dev->requested_n_rxq) {
dev->requested_n_rxq = new_n_rxq;
netdev_request_reconfigure(netdev);
}
ovs_mutex_unlock(&dev->mutex);
return 0;
}
static int
netdev_dpdk_get_numa_id(const struct netdev *netdev)
{
struct netdev_dpdk *dev = netdev_dpdk_cast(netdev);
return dev->socket_id;
}
/* Sets the number of tx queues for the dpdk interface. */
static int
netdev_dpdk_set_tx_multiq(struct netdev *netdev, unsigned int n_txq)
{
struct netdev_dpdk *dev = netdev_dpdk_cast(netdev);
ovs_mutex_lock(&dev->mutex);
if (dev->requested_n_txq == n_txq) {
goto out;
}
dev->requested_n_txq = n_txq;
netdev_request_reconfigure(netdev);
out:
ovs_mutex_unlock(&dev->mutex);
return 0;
}
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 *rxq)
{
return CONTAINER_OF(rxq, 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 *dev = netdev_dpdk_cast(rxq->netdev);
ovs_mutex_lock(&dev->mutex);
rx->port_id = dev->port_id;
ovs_mutex_unlock(&dev->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
netdev_dpdk_eth_tx_burst(struct netdev_dpdk *dev, int qid,
struct rte_mbuf **pkts, int cnt)
{
uint32_t nb_tx = 0;
while (nb_tx != cnt) {
uint32_t ret;
ret = rte_eth_tx_burst(dev->port_id, qid, pkts + nb_tx, cnt - nb_tx);
if (!ret) {
break;
}
nb_tx += ret;
}
if (OVS_UNLIKELY(nb_tx != cnt)) {
/* 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 < cnt; i++) {
rte_pktmbuf_free(pkts[i]);
}
rte_spinlock_lock(&dev->stats_lock);
dev->stats.tx_dropped += cnt - nb_tx;
rte_spinlock_unlock(&dev->stats_lock);
}
}
static inline bool
netdev_dpdk_policer_pkt_handle(struct rte_meter_srtcm *meter,
struct rte_mbuf *pkt, uint64_t time)
{
uint32_t pkt_len = rte_pktmbuf_pkt_len(pkt) - sizeof(struct ether_hdr);
return rte_meter_srtcm_color_blind_check(meter, time, pkt_len) ==
e_RTE_METER_GREEN;
}
static int
netdev_dpdk_policer_run(struct rte_meter_srtcm *meter,
struct rte_mbuf **pkts, int pkt_cnt)
{
int i = 0;
int cnt = 0;
struct rte_mbuf *pkt = NULL;
uint64_t current_time = rte_rdtsc();
for (i = 0; i < pkt_cnt; i++) {
pkt = pkts[i];
/* Handle current packet */
if (netdev_dpdk_policer_pkt_handle(meter, pkt, current_time)) {
if (cnt != i) {
pkts[cnt] = pkt;
}
cnt++;
} else {
rte_pktmbuf_free(pkt);
}
}
return cnt;
}
static int
ingress_policer_run(struct ingress_policer *policer, struct rte_mbuf **pkts,
int pkt_cnt)
{
int cnt = 0;
rte_spinlock_lock(&policer->policer_lock);
cnt = netdev_dpdk_policer_run(&policer->in_policer, pkts, pkt_cnt);
rte_spinlock_unlock(&policer->policer_lock);
return cnt;
}
static bool
is_vhost_running(struct virtio_net *virtio_dev)
{
return (virtio_dev != NULL && (virtio_dev->flags & VIRTIO_DEV_RUNNING));
}
static inline void
netdev_dpdk_vhost_update_rx_size_counters(struct netdev_stats *stats,
unsigned int packet_size)
{
/* Hard-coded search for the size bucket. */
if (packet_size < 256) {
if (packet_size >= 128) {
stats->rx_128_to_255_packets++;
} else if (packet_size <= 64) {
stats->rx_1_to_64_packets++;
} else {
stats->rx_65_to_127_packets++;
}
} else {
if (packet_size >= 1523) {
stats->rx_1523_to_max_packets++;
} else if (packet_size >= 1024) {
stats->rx_1024_to_1522_packets++;
} else if (packet_size < 512) {
stats->rx_256_to_511_packets++;
} else {
stats->rx_512_to_1023_packets++;
}
}
}
static inline void
netdev_dpdk_vhost_update_rx_counters(struct netdev_stats *stats,
struct dp_packet **packets, int count,
int dropped)
{
int i;
unsigned int packet_size;
struct dp_packet *packet;
stats->rx_packets += count;
stats->rx_dropped += dropped;
for (i = 0; i < count; i++) {
packet = packets[i];
packet_size = dp_packet_size(packet);
if (OVS_UNLIKELY(packet_size < ETH_HEADER_LEN)) {
/* This only protects the following multicast counting from
* too short packets, but it does not stop the packet from
* further processing. */
stats->rx_errors++;
stats->rx_length_errors++;
continue;
}
netdev_dpdk_vhost_update_rx_size_counters(stats, packet_size);
struct eth_header *eh = (struct eth_header *) dp_packet_data(packet);
if (OVS_UNLIKELY(eth_addr_is_multicast(eh->eth_dst))) {
stats->multicast++;
}
stats->rx_bytes += packet_size;
}
}
/*
* 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_batch *batch)
{
struct netdev_dpdk *dev = netdev_dpdk_cast(rxq->netdev);
struct virtio_net *virtio_dev = netdev_dpdk_get_virtio(dev);
int qid = rxq->queue_id;
struct ingress_policer *policer = netdev_dpdk_get_ingress_policer(dev);
uint16_t nb_rx = 0;
uint16_t dropped = 0;
if (OVS_UNLIKELY(!is_vhost_running(virtio_dev)
|| !(dev->flags & NETDEV_UP))) {
return EAGAIN;
}
nb_rx = rte_vhost_dequeue_burst(virtio_dev, qid * VIRTIO_QNUM + VIRTIO_TXQ,
dev->dpdk_mp->mp,
(struct rte_mbuf **) batch->packets,
NETDEV_MAX_BURST);
if (!nb_rx) {
return EAGAIN;
}
if (policer) {
dropped = nb_rx;
nb_rx = ingress_policer_run(policer,
(struct rte_mbuf **) batch->packets,
nb_rx);
dropped -= nb_rx;
}
rte_spinlock_lock(&dev->stats_lock);
netdev_dpdk_vhost_update_rx_counters(&dev->stats, batch->packets,
nb_rx, dropped);
rte_spinlock_unlock(&dev->stats_lock);
batch->count = (int) nb_rx;
return 0;
}
static int
netdev_dpdk_rxq_recv(struct netdev_rxq *rxq, struct dp_packet_batch *batch)
{
struct netdev_rxq_dpdk *rx = netdev_rxq_dpdk_cast(rxq);
struct netdev_dpdk *dev = netdev_dpdk_cast(rxq->netdev);
struct ingress_policer *policer = netdev_dpdk_get_ingress_policer(dev);
int nb_rx;
int dropped = 0;
nb_rx = rte_eth_rx_burst(rx->port_id, rxq->queue_id,
(struct rte_mbuf **) batch->packets,
NETDEV_MAX_BURST);
if (!nb_rx) {
return EAGAIN;
}
if (policer) {
dropped = nb_rx;
nb_rx = ingress_policer_run(policer,
(struct rte_mbuf **)batch->packets,
nb_rx);
dropped -= nb_rx;
}
/* Update stats to reflect dropped packets */
if (OVS_UNLIKELY(dropped)) {
rte_spinlock_lock(&dev->stats_lock);
dev->stats.rx_dropped += dropped;
rte_spinlock_unlock(&dev->stats_lock);
}
batch->count = nb_rx;
return 0;
}
static inline int
netdev_dpdk_qos_run__(struct netdev_dpdk *dev, struct rte_mbuf **pkts,
int cnt)
{
struct netdev *netdev = &dev->up;
if (dev->qos_conf != NULL) {
rte_spinlock_lock(&dev->qos_lock);
if (dev->qos_conf != NULL) {
cnt = dev->qos_conf->ops->qos_run(netdev, pkts, cnt);
}
rte_spinlock_unlock(&dev->qos_lock);
}
return cnt;
}
static inline void
netdev_dpdk_vhost_update_tx_counters(struct netdev_stats *stats,
struct dp_packet **packets,
int attempted,
int dropped)
{
int i;
int sent = attempted - dropped;
stats->tx_packets += sent;
stats->tx_dropped += dropped;
for (i = 0; i < sent; i++) {
stats->tx_bytes += dp_packet_size(packets[i]);
}
}
static void
__netdev_dpdk_vhost_send(struct netdev *netdev, int qid,
struct dp_packet **pkts, int cnt,
bool may_steal)
{
struct netdev_dpdk *dev = netdev_dpdk_cast(netdev);
struct virtio_net *virtio_dev = netdev_dpdk_get_virtio(dev);
struct rte_mbuf **cur_pkts = (struct rte_mbuf **) pkts;
unsigned int total_pkts = cnt;
unsigned int qos_pkts = cnt;
int retries = 0;
qid = dev->tx_q[qid % netdev->n_txq].map;
if (OVS_UNLIKELY(!is_vhost_running(virtio_dev) || qid < 0
|| !(dev->flags & NETDEV_UP))) {
rte_spinlock_lock(&dev->stats_lock);
dev->stats.tx_dropped+= cnt;
rte_spinlock_unlock(&dev->stats_lock);
goto out;
}
rte_spinlock_lock(&dev->tx_q[qid].tx_lock);
/* Check has QoS has been configured for the netdev */
cnt = netdev_dpdk_qos_run__(dev, cur_pkts, cnt);
qos_pkts -= cnt;
do {
int vhost_qid = qid * VIRTIO_QNUM + VIRTIO_RXQ;
unsigned int tx_pkts;
tx_pkts = rte_vhost_enqueue_burst(virtio_dev, vhost_qid,
cur_pkts, cnt);
if (OVS_LIKELY(tx_pkts)) {
/* Packets have been sent.*/
cnt -= tx_pkts;
/* Prepare for possible retry.*/
cur_pkts = &cur_pkts[tx_pkts];
} else {
/* No packets sent - do not retry.*/
break;
}
} while (cnt && (retries++ < VHOST_ENQ_RETRY_NUM));
rte_spinlock_unlock(&dev->tx_q[qid].tx_lock);
rte_spinlock_lock(&dev->stats_lock);
cnt += qos_pkts;
netdev_dpdk_vhost_update_tx_counters(&dev->stats, pkts, total_pkts, cnt);
rte_spinlock_unlock(&dev->stats_lock);
out:
if (may_steal) {
int i;
for (i = 0; i < total_pkts; i++) {
dp_packet_delete(pkts[i]);
}
}
}
/* Tx function. Transmit packets indefinitely */
static void
dpdk_do_tx_copy(struct netdev *netdev, int qid, struct dp_packet_batch *batch)
OVS_NO_THREAD_SAFETY_ANALYSIS
{
#if !defined(__CHECKER__) && !defined(_WIN32)
const size_t PKT_ARRAY_SIZE = batch->count;
#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 (!dpdk_thread_is_pmd()) {
ovs_mutex_lock(&nonpmd_mempool_mutex);
}
for (i = 0; i < batch->count; i++) {
int size = dp_packet_size(batch->packets[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 += batch->count - i;
break;
}
/* Cut the size so only the truncated size is copied. */
size -= dp_packet_get_cutlen(batch->packets[i]);
dp_packet_reset_cutlen(batch->packets[i]);
/* We have to do a copy for now */
memcpy(rte_pktmbuf_mtod(mbufs[newcnt], void *),
dp_packet_data(batch->packets[i]), size);
rte_pktmbuf_data_len(mbufs[newcnt]) = size;
rte_pktmbuf_pkt_len(mbufs[newcnt]) = size;
newcnt++;
}
if (dev->type == DPDK_DEV_VHOST) {
__netdev_dpdk_vhost_send(netdev, qid, (struct dp_packet **) mbufs,
newcnt, true);
} else {
unsigned int qos_pkts = newcnt;
/* Check if QoS has been configured for this netdev. */
newcnt = netdev_dpdk_qos_run__(dev, mbufs, newcnt);
dropped += qos_pkts - newcnt;
netdev_dpdk_eth_tx_burst(dev, qid, mbufs, newcnt);
}
if (OVS_UNLIKELY(dropped)) {
rte_spinlock_lock(&dev->stats_lock);
dev->stats.tx_dropped += dropped;
rte_spinlock_unlock(&dev->stats_lock);
}
if (!dpdk_thread_is_pmd()) {
ovs_mutex_unlock(&nonpmd_mempool_mutex);
}
}
static int
netdev_dpdk_vhost_send(struct netdev *netdev, int qid,
struct dp_packet_batch *batch,
bool may_steal)
{
if (OVS_UNLIKELY(batch->packets[0]->source != DPBUF_DPDK)) {
dpdk_do_tx_copy(netdev, qid, batch);
dp_packet_delete_batch(batch, may_steal);
} else {
dp_packet_batch_apply_cutlen(batch);
__netdev_dpdk_vhost_send(netdev, qid, batch->packets, batch->count,
may_steal);
}
return 0;
}
static inline void
netdev_dpdk_send__(struct netdev_dpdk *dev, int qid,
struct dp_packet_batch *batch, bool may_steal)
{
if (OVS_UNLIKELY(dev->txq_needs_locking)) {
qid = qid % dev->up.n_txq;
rte_spinlock_lock(&dev->tx_q[qid].tx_lock);
}
if (OVS_UNLIKELY(!may_steal ||
batch->packets[0]->source != DPBUF_DPDK)) {
struct netdev *netdev = &dev->up;
dpdk_do_tx_copy(netdev, qid, batch);
dp_packet_delete_batch(batch, may_steal);
} else {
int next_tx_idx = 0;
int dropped = 0;
unsigned int qos_pkts = 0;
unsigned int temp_cnt = 0;
int cnt = batch->count;
for (int i = 0; i < cnt; i++) {
int size = dp_packet_size(batch->packets[i]);
size -= dp_packet_get_cutlen(batch->packets[i]);
dp_packet_set_size(batch->packets[i], size);
if (OVS_UNLIKELY(size > dev->max_packet_len)) {
if (next_tx_idx != i) {
temp_cnt = i - next_tx_idx;
qos_pkts = temp_cnt;
temp_cnt = netdev_dpdk_qos_run__(dev,
(struct rte_mbuf**)batch->packets,
temp_cnt);
dropped += qos_pkts - temp_cnt;
netdev_dpdk_eth_tx_burst(dev, qid,
(struct rte_mbuf **)&batch->packets[next_tx_idx],
temp_cnt);
}
VLOG_WARN_RL(&rl, "Too big size %d max_packet_len %d",
(int)size , dev->max_packet_len);
dp_packet_delete(batch->packets[i]);
dropped++;
next_tx_idx = i + 1;
}
}
if (next_tx_idx != cnt) {
cnt -= next_tx_idx;
qos_pkts = cnt;
cnt = netdev_dpdk_qos_run__(dev,
(struct rte_mbuf**)batch->packets, cnt);
dropped += qos_pkts - cnt;
netdev_dpdk_eth_tx_burst(dev, qid,
(struct rte_mbuf **)&batch->packets[next_tx_idx],
cnt);
}
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_batch *batch, bool may_steal)
{
struct netdev_dpdk *dev = netdev_dpdk_cast(netdev);
netdev_dpdk_send__(dev, qid, batch, may_steal);
return 0;
}
static int
netdev_dpdk_set_etheraddr(struct netdev *netdev, const struct eth_addr mac)
{
struct netdev_dpdk *dev = netdev_dpdk_cast(netdev);
ovs_mutex_lock(&dev->mutex);
if (!eth_addr_equals(dev->hwaddr, mac)) {
dev->hwaddr = mac;
netdev_change_seq_changed(netdev);
}
ovs_mutex_unlock(&dev->mutex);
return 0;
}
static int
netdev_dpdk_get_etheraddr(const struct netdev *netdev, struct eth_addr *mac)
{
struct netdev_dpdk *dev = netdev_dpdk_cast(netdev);
ovs_mutex_lock(&dev->mutex);
*mac = dev->hwaddr;
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, dpdk_mtu;
struct dpdk_mp *old_mp;
struct dpdk_mp *mp;
uint32_t buf_size;
ovs_mutex_lock(&dpdk_mutex);
ovs_mutex_lock(&dev->mutex);
if (dev->mtu == mtu) {
err = 0;
goto out;
}
buf_size = dpdk_buf_size(mtu);
dpdk_mtu = FRAME_LEN_TO_MTU(buf_size);
mp = dpdk_mp_get(dev->socket_id, dpdk_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_FRAME_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_FRAME_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);
rte_spinlock_lock(&dev->stats_lock);
/* Supported Stats */
stats->rx_packets += dev->stats.rx_packets;
stats->tx_packets += dev->stats.tx_packets;
stats->rx_dropped = dev->stats.rx_dropped;
stats->tx_dropped += dev->stats.tx_dropped;
stats->multicast = dev->stats.multicast;
stats->rx_bytes = dev->stats.rx_bytes;
stats->tx_bytes = dev->stats.tx_bytes;
stats->rx_errors = dev->stats.rx_errors;
stats->rx_length_errors = dev->stats.rx_length_errors;
stats->rx_1_to_64_packets = dev->stats.rx_1_to_64_packets;
stats->rx_65_to_127_packets = dev->stats.rx_65_to_127_packets;
stats->rx_128_to_255_packets = dev->stats.rx_128_to_255_packets;
stats->rx_256_to_511_packets = dev->stats.rx_256_to_511_packets;
stats->rx_512_to_1023_packets = dev->stats.rx_512_to_1023_packets;
stats->rx_1024_to_1522_packets = dev->stats.rx_1024_to_1522_packets;
stats->rx_1523_to_max_packets = dev->stats.rx_1523_to_max_packets;
rte_spinlock_unlock(&dev->stats_lock);
ovs_mutex_unlock(&dev->mutex);
return 0;
}
static void
netdev_dpdk_convert_xstats(struct netdev_stats *stats,
const struct rte_eth_xstats *xstats,
const unsigned int size)
{
/* XXX Current implementation is simple search through an array
* to find hardcoded counter names. In future DPDK release (TBD)
* XSTATS API will change so each counter will be represented by
* unique ID instead of String. */
for (unsigned int i = 0; i < size; i++) {
if (strcmp(XSTAT_RX_64_PACKETS, xstats[i].name) == 0) {
stats->rx_1_to_64_packets = xstats[i].value;
} else if (strcmp(XSTAT_RX_65_TO_127_PACKETS, xstats[i].name) == 0) {
stats->rx_65_to_127_packets = xstats[i].value;
} else if (strcmp(XSTAT_RX_128_TO_255_PACKETS, xstats[i].name) == 0) {
stats->rx_128_to_255_packets = xstats[i].value;
} else if (strcmp(XSTAT_RX_256_TO_511_PACKETS, xstats[i].name) == 0) {
stats->rx_256_to_511_packets = xstats[i].value;
} else if (strcmp(XSTAT_RX_512_TO_1023_PACKETS,
xstats[i].name) == 0) {
stats->rx_512_to_1023_packets = xstats[i].value;
} else if (strcmp(XSTAT_RX_1024_TO_1522_PACKETS,
xstats[i].name) == 0) {
stats->rx_1024_to_1522_packets = xstats[i].value;
} else if (strcmp(XSTAT_RX_1523_TO_MAX_PACKETS,
xstats[i].name) == 0) {
stats->rx_1523_to_max_packets = xstats[i].value;
} else if (strcmp(XSTAT_TX_64_PACKETS, xstats[i].name) == 0) {
stats->tx_1_to_64_packets = xstats[i].value;
} else if (strcmp(XSTAT_TX_65_TO_127_PACKETS, xstats[i].name) == 0) {
stats->tx_65_to_127_packets = xstats[i].value;
} else if (strcmp(XSTAT_TX_128_TO_255_PACKETS, xstats[i].name) == 0) {
stats->tx_128_to_255_packets = xstats[i].value;
} else if (strcmp(XSTAT_TX_256_TO_511_PACKETS, xstats[i].name) == 0) {
stats->tx_256_to_511_packets = xstats[i].value;
} else if (strcmp(XSTAT_TX_512_TO_1023_PACKETS,
xstats[i].name) == 0) {
stats->tx_512_to_1023_packets = xstats[i].value;
} else if (strcmp(XSTAT_TX_1024_TO_1522_PACKETS,
xstats[i].name) == 0) {
stats->tx_1024_to_1522_packets = xstats[i].value;
} else if (strcmp(XSTAT_TX_1523_TO_MAX_PACKETS,
xstats[i].name) == 0) {
stats->tx_1523_to_max_packets = xstats[i].value;
} else if (strcmp(XSTAT_TX_MULTICAST_PACKETS, xstats[i].name) == 0) {
stats->tx_multicast_packets = xstats[i].value;
} else if (strcmp(XSTAT_RX_BROADCAST_PACKETS, xstats[i].name) == 0) {
stats->rx_broadcast_packets = xstats[i].value;
} else if (strcmp(XSTAT_TX_BROADCAST_PACKETS, xstats[i].name) == 0) {
stats->tx_broadcast_packets = xstats[i].value;
} else if (strcmp(XSTAT_RX_UNDERSIZED_ERRORS, xstats[i].name) == 0) {
stats->rx_undersized_errors = xstats[i].value;
} else if (strcmp(XSTAT_RX_FRAGMENTED_ERRORS, xstats[i].name) == 0) {
stats->rx_fragmented_errors = xstats[i].value;
} else if (strcmp(XSTAT_RX_JABBER_ERRORS, xstats[i].name) == 0) {
stats->rx_jabber_errors = xstats[i].value;
}
}
}
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);
struct rte_eth_xstats *rte_xstats;
int rte_xstats_len, rte_xstats_ret;
if (rte_eth_stats_get(dev->port_id, &rte_stats)) {
VLOG_ERR("Can't get ETH statistics for port: %i.", dev->port_id);
ovs_mutex_unlock(&dev->mutex);
return EPROTO;
}
rte_xstats_len = rte_eth_xstats_get(dev->port_id, NULL, 0);
if (rte_xstats_len > 0) {
rte_xstats = dpdk_rte_mzalloc(sizeof(*rte_xstats) * rte_xstats_len);
memset(rte_xstats, 0xff, sizeof(*rte_xstats) * rte_xstats_len);
rte_xstats_ret = rte_eth_xstats_get(dev->port_id, rte_xstats,
rte_xstats_len);
if (rte_xstats_ret > 0 && rte_xstats_ret <= rte_xstats_len) {
netdev_dpdk_convert_xstats(stats, rte_xstats, rte_xstats_ret);
}
rte_free(rte_xstats);
} else {
VLOG_WARN("Can't get XSTATS counters for port: %i.", dev->port_id);
}
stats->rx_packets = rte_stats.ipackets;
stats->tx_packets = rte_stats.opackets;
stats->rx_bytes = rte_stats.ibytes;
stats->tx_bytes = rte_stats.obytes;
/* DPDK counts imissed as errors, but count them here as dropped instead */
stats->rx_errors = rte_stats.ierrors - rte_stats.imissed;
stats->tx_errors = rte_stats.oerrors;
stats->multicast = rte_stats.imcasts;
rte_spinlock_lock(&dev->stats_lock);
stats->tx_dropped = dev->stats.tx_dropped;
stats->rx_dropped = dev->stats.rx_dropped;
rte_spinlock_unlock(&dev->stats_lock);
/* These are the available DPDK counters for packets not received due to
* local resource constraints in DPDK and NIC respectively. */
stats->rx_dropped += rte_stats.rx_nombuf + rte_stats.imissed;
stats->rx_missed_errors = rte_stats.imissed;
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_HALF_DUPLEX) {
if (link.link_speed == ETH_SPEED_NUM_10M) {
*current = NETDEV_F_10MB_HD;
}
if (link.link_speed == ETH_SPEED_NUM_100M) {
*current = NETDEV_F_100MB_HD;
}
if (link.link_speed == ETH_SPEED_NUM_1G) {
*current = NETDEV_F_1GB_HD;
}
} else if (link.link_duplex == ETH_LINK_FULL_DUPLEX) {
if (link.link_speed == ETH_SPEED_NUM_10M) {
*current = NETDEV_F_10MB_FD;
}
if (link.link_speed == ETH_SPEED_NUM_100M) {
*current = NETDEV_F_100MB_FD;
}
if (link.link_speed == ETH_SPEED_NUM_1G) {
*current = NETDEV_F_1GB_FD;
}
if (link.link_speed == ETH_SPEED_NUM_10G) {
*current = NETDEV_F_10GB_FD;
}
}
if (link.link_autoneg) {
*current |= NETDEV_F_AUTONEG;
}
return 0;
}
static struct ingress_policer *
netdev_dpdk_policer_construct(uint32_t rate, uint32_t burst)
{
struct ingress_policer *policer = NULL;
uint64_t rate_bytes;
uint64_t burst_bytes;
int err = 0;
policer = xmalloc(sizeof *policer);
rte_spinlock_init(&policer->policer_lock);
/* rte_meter requires bytes so convert kbits rate and burst to bytes. */
rate_bytes = rate * 1000/8;
burst_bytes = burst * 1000/8;
policer->app_srtcm_params.cir = rate_bytes;
policer->app_srtcm_params.cbs = burst_bytes;
policer->app_srtcm_params.ebs = 0;
err = rte_meter_srtcm_config(&policer->in_policer,
&policer->app_srtcm_params);
if(err) {
VLOG_ERR("Could not create rte meter for ingress policer");
return NULL;
}
return policer;
}
static int
netdev_dpdk_set_policing(struct netdev* netdev, uint32_t policer_rate,
uint32_t policer_burst)
{
struct netdev_dpdk *dev = netdev_dpdk_cast(netdev);
struct ingress_policer *policer;
/* Force to 0 if no rate specified,
* default to 8000 kbits if burst is 0,
* else stick with user-specified value.
*/
policer_burst = (!policer_rate ? 0
: !policer_burst ? 8000
: policer_burst);
ovs_mutex_lock(&dev->mutex);
policer = ovsrcu_get_protected(struct ingress_policer *,
&dev->ingress_policer);
if (dev->policer_rate == policer_rate &&
dev->policer_burst == policer_burst) {
/* Assume that settings haven't changed since we last set them. */
ovs_mutex_unlock(&dev->mutex);
return 0;
}
/* Destroy any existing ingress policer for the device if one exists */
if (policer) {
ovsrcu_postpone(free, policer);
}
if (policer_rate != 0) {
policer = netdev_dpdk_policer_construct(policer_rate, policer_burst);
} else {
policer = NULL;
}
ovsrcu_set(&dev->ingress_policer, policer);
dev->policer_rate = policer_rate;
dev->policer_burst = policer_burst;
ovs_mutex_unlock(&dev->mutex);
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);
}
} else {
/* If DPDK_DEV_VHOST device's NETDEV_UP flag was changed and vhost is
* running then change netdev's change_seq to trigger link state
* update. */
struct virtio_net *virtio_dev = netdev_dpdk_get_virtio(dev);
if ((NETDEV_UP & ((*old_flagsp ^ on) | (*old_flagsp ^ off)))
&& is_vhost_running(virtio_dev)) {
netdev_change_seq_changed(&dev->up);
/* Clear statistics if device is getting up. */
if (NETDEV_UP & on) {
rte_spinlock_lock(&dev->stats_lock);
memset(&dev->stats, 0, sizeof(dev->stats));
rte_spinlock_unlock(&dev->stats_lock);
}
}
}
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 *dev = netdev_dpdk_cast(netdev);
int error;
ovs_mutex_lock(&dev->mutex);
error = netdev_dpdk_update_flags__(dev, off, on, old_flagsp);
ovs_mutex_unlock(&dev->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->max_packet_len);
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);
if (dev_info.pci_dev) {
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 *virtio_dev)
{
uint32_t i;
uint64_t idx;
for (i = 0; i < virtio_dev->virt_qp_nb; i++) {
idx = i * VIRTIO_QNUM;
rte_vhost_enable_guest_notification(virtio_dev, idx + VIRTIO_RXQ, 0);
rte_vhost_enable_guest_notification(virtio_dev, idx + VIRTIO_TXQ, 0);
}
}
/*
* Fixes mapping for vhost-user tx queues. Must be called after each
* enabling/disabling of queues and n_txq modifications.
*/
static void
netdev_dpdk_remap_txqs(struct netdev_dpdk *dev)
OVS_REQUIRES(dev->mutex)
{
int *enabled_queues, n_enabled = 0;
int i, k, total_txqs = dev->up.n_txq;
enabled_queues = dpdk_rte_mzalloc(total_txqs * sizeof *enabled_queues);
for (i = 0; i < total_txqs; i++) {
/* Enabled queues always mapped to themselves. */
if (dev->tx_q[i].map == i) {
enabled_queues[n_enabled++] = i;
}
}
if (n_enabled == 0 && total_txqs != 0) {
enabled_queues[0] = OVS_VHOST_QUEUE_DISABLED;
n_enabled = 1;
}
k = 0;
for (i = 0; i < total_txqs; i++) {
if (dev->tx_q[i].map != i) {
dev->tx_q[i].map = enabled_queues[k];
k = (k + 1) % n_enabled;
}
}
VLOG_DBG("TX queue mapping for %s\n", dev->vhost_id);
for (i = 0; i < total_txqs; i++) {
VLOG_DBG("%2d --> %2d", i, dev->tx_q[i].map);
}
rte_free(enabled_queues);
}
/*
* A new virtio-net device is added to a vhost port.
*/
static int
new_device(struct virtio_net *virtio_dev)
{
struct netdev_dpdk *dev;
bool exists = false;
int newnode = 0;
long err = 0;
ovs_mutex_lock(&dpdk_mutex);
/* Add device to the vhost port with the same name as that passed down. */
LIST_FOR_EACH(dev, list_node, &dpdk_list) {
if (strncmp(virtio_dev->ifname, dev->vhost_id, IF_NAME_SZ) == 0) {
uint32_t qp_num = virtio_dev->virt_qp_nb;
ovs_mutex_lock(&dev->mutex);
/* Get NUMA information */
err = get_mempolicy(&newnode, NULL, 0, virtio_dev,
MPOL_F_NODE | MPOL_F_ADDR);
if (err) {
VLOG_INFO("Error getting NUMA info for vHost Device '%s'",
virtio_dev->ifname);
newnode = dev->socket_id;
}
dev->requested_socket_id = newnode;
dev->requested_n_rxq = qp_num;
dev->requested_n_txq = qp_num;
netdev_request_reconfigure(&dev->up);
ovsrcu_set(&dev->virtio_dev, virtio_dev);
exists = true;
/* Disable notifications. */
set_irq_status(virtio_dev);
netdev_change_seq_changed(&dev->up);
ovs_mutex_unlock(&dev->mutex);
break;
}
}
ovs_mutex_unlock(&dpdk_mutex);
if (!exists) {
VLOG_INFO("vHost Device '%s' %"PRIu64" can't be added - name not "
"found", virtio_dev->ifname, virtio_dev->device_fh);
return -1;
}
VLOG_INFO("vHost Device '%s' %"PRIu64" has been added on numa node %i",
virtio_dev->ifname, virtio_dev->device_fh, newnode);
return 0;
}
/* Clears mapping for all available queues of vhost interface. */
static void
netdev_dpdk_txq_map_clear(struct netdev_dpdk *dev)
OVS_REQUIRES(dev->mutex)
{
int i;
for (i = 0; i < dev->up.n_txq; i++) {
dev->tx_q[i].map = OVS_VHOST_QUEUE_MAP_UNKNOWN;
}
}
/*
* 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 *virtio_dev)
{
struct netdev_dpdk *dev;
bool exists = false;
ovs_mutex_lock(&dpdk_mutex);
LIST_FOR_EACH (dev, list_node, &dpdk_list) {
if (netdev_dpdk_get_virtio(dev) == virtio_dev) {
ovs_mutex_lock(&dev->mutex);
virtio_dev->flags &= ~VIRTIO_DEV_RUNNING;
ovsrcu_set(&dev->virtio_dev, NULL);
/* Clear tx/rx queue settings. */
netdev_dpdk_txq_map_clear(dev);
dev->requested_n_rxq = NR_QUEUE;
dev->requested_n_txq = NR_QUEUE;
netdev_request_reconfigure(&dev->up);
netdev_change_seq_changed(&dev->up);
ovs_mutex_unlock(&dev->mutex);
exists = true;
break;
}
}
ovs_mutex_unlock(&dpdk_mutex);
if (exists == true) {
/*
* Wait for other threads to quiesce after setting the 'virtio_dev'
* to NULL, before returning.
*/
ovsrcu_synchronize();
/*
* As call to ovsrcu_synchronize() will end the quiescent state,
* put thread back into quiescent state before returning.
*/
ovsrcu_quiesce_start();
VLOG_INFO("vHost Device '%s' %"PRIu64" has been removed",
virtio_dev->ifname, virtio_dev->device_fh);
} else {
VLOG_INFO("vHost Device '%s' %"PRIu64" not found", virtio_dev->ifname,
virtio_dev->device_fh);
}
}
static int
vring_state_changed(struct virtio_net *virtio_dev, uint16_t queue_id,
int enable)
{
struct netdev_dpdk *dev;
bool exists = false;
int qid = queue_id / VIRTIO_QNUM;
if (queue_id % VIRTIO_QNUM == VIRTIO_TXQ) {
return 0;
}
ovs_mutex_lock(&dpdk_mutex);
LIST_FOR_EACH (dev, list_node, &dpdk_list) {
if (strncmp(virtio_dev->ifname, dev->vhost_id, IF_NAME_SZ) == 0) {
ovs_mutex_lock(&dev->mutex);
if (enable) {
dev->tx_q[qid].map = qid;
} else {
dev->tx_q[qid].map = OVS_VHOST_QUEUE_DISABLED;
}
netdev_dpdk_remap_txqs(dev);
exists = true;
ovs_mutex_unlock(&dev->mutex);
break;
}
}
ovs_mutex_unlock(&dpdk_mutex);
if (exists) {
VLOG_INFO("State of queue %d ( tx_qid %d ) of vhost device '%s' %"
PRIu64" changed to \'%s\'", queue_id, qid,
virtio_dev->ifname, virtio_dev->device_fh,
(enable == 1) ? "enabled" : "disabled");
} else {
VLOG_INFO("vHost Device '%s' %"PRIu64" not found", virtio_dev->ifname,
virtio_dev->device_fh);
return -1;
}
return 0;
}
struct virtio_net *
netdev_dpdk_get_virtio(const struct netdev_dpdk *dev)
{
return ovsrcu_get(struct virtio_net *, &dev->virtio_dev);
}
struct ingress_policer *
netdev_dpdk_get_ingress_policer(const struct netdev_dpdk *dev)
{
return ovsrcu_get(struct ingress_policer *, &dev->ingress_policer);
}
/*
* 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,
.vring_state_changed = vring_state_changed
};
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);
rte_vhost_feature_disable(1ULL << VIRTIO_NET_F_HOST_TSO4
| 1ULL << VIRTIO_NET_F_HOST_TSO6
| 1ULL << VIRTIO_NET_F_CSUM);
ovs_thread_create("vhost_thread", start_vhost_loop, NULL);
return 0;
}
static int
dpdk_vhost_cuse_class_init(void)
{
return 0;
}
static int
dpdk_vhost_user_class_init(void)
{
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);
}
/* 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[RTE_RING_NAMESIZE];
int err;
ivshmem = dpdk_rte_mzalloc(sizeof *ivshmem);
if (ivshmem == NULL) {
return ENOMEM;
}
/* XXX: Add support for multiquque ring. */
err = snprintf(ring_name, sizeof(ring_name), "%s_tx", dev_name);
if (err < 0) {
return -err;
}
/* Create single producer tx ring, netdev does explicit locking. */
ivshmem->cring_tx = rte_ring_create(ring_name, DPDK_RING_SIZE, SOCKET0,
RING_F_SP_ENQ);
if (ivshmem->cring_tx == NULL) {
rte_free(ivshmem);
return ENOMEM;
}
err = snprintf(ring_name, sizeof(ring_name), "%s_rx", dev_name);
if (err < 0) {
return -err;
}
/* Create single consumer rx ring, netdev does explicit locking. */
ivshmem->cring_rx = rte_ring_create(ring_name, DPDK_RING_SIZE, SOCKET0,
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;
ovs_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_batch *batch, bool may_steal)
{
struct netdev_dpdk *dev = 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 < batch->count; i++) {
dp_packet_rss_invalidate(batch->packets[i]);
}
netdev_dpdk_send__(dev, qid, batch, 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;
}
/* QoS Functions */
/*
* Initialize QoS configuration operations.
*/
static void
qos_conf_init(struct qos_conf *conf, const struct dpdk_qos_ops *ops)
{
conf->ops = ops;
}
/*
* Search existing QoS operations in qos_ops and compare each set of
* operations qos_name to name. Return a dpdk_qos_ops pointer to a match,
* else return NULL
*/
static const struct dpdk_qos_ops *
qos_lookup_name(const char *name)
{
const struct dpdk_qos_ops *const *opsp;
for (opsp = qos_confs; *opsp != NULL; opsp++) {
const struct dpdk_qos_ops *ops = *opsp;
if (!strcmp(name, ops->qos_name)) {
return ops;
}
}
return NULL;
}
/*
* Call qos_destruct to clean up items associated with the netdevs
* qos_conf. Set netdevs qos_conf to NULL.
*/
static void
qos_delete_conf(struct netdev *netdev)
{
struct netdev_dpdk *dev = netdev_dpdk_cast(netdev);
rte_spinlock_lock(&dev->qos_lock);
if (dev->qos_conf) {
if (dev->qos_conf->ops->qos_destruct) {
dev->qos_conf->ops->qos_destruct(netdev, dev->qos_conf);
}
dev->qos_conf = NULL;
}
rte_spinlock_unlock(&dev->qos_lock);
}
static int
netdev_dpdk_get_qos_types(const struct netdev *netdev OVS_UNUSED,
struct sset *types)
{
const struct dpdk_qos_ops *const *opsp;
for (opsp = qos_confs; *opsp != NULL; opsp++) {
const struct dpdk_qos_ops *ops = *opsp;
if (ops->qos_construct && ops->qos_name[0] != '\0') {
sset_add(types, ops->qos_name);
}
}
return 0;
}
static int
netdev_dpdk_get_qos(const struct netdev *netdev,
const char **typep, struct smap *details)
{
struct netdev_dpdk *dev = netdev_dpdk_cast(netdev);
int error = 0;
ovs_mutex_lock(&dev->mutex);
if(dev->qos_conf) {
*typep = dev->qos_conf->ops->qos_name;
error = (dev->qos_conf->ops->qos_get
? dev->qos_conf->ops->qos_get(netdev, details): 0);
}
ovs_mutex_unlock(&dev->mutex);
return error;
}
static int
netdev_dpdk_set_qos(struct netdev *netdev,
const char *type, const struct smap *details)
{
struct netdev_dpdk *dev = netdev_dpdk_cast(netdev);
const struct dpdk_qos_ops *new_ops = NULL;
int error = 0;
/* If type is empty or unsupported then the current QoS configuration
* for the dpdk-netdev can be destroyed */
new_ops = qos_lookup_name(type);
if (type[0] == '\0' || !new_ops || !new_ops->qos_construct) {
qos_delete_conf(netdev);
return EOPNOTSUPP;
}
ovs_mutex_lock(&dev->mutex);
if (dev->qos_conf) {
if (new_ops == dev->qos_conf->ops) {
error = new_ops->qos_set ? new_ops->qos_set(netdev, details) : 0;
} else {
/* Delete existing QoS configuration. */
qos_delete_conf(netdev);
ovs_assert(dev->qos_conf == NULL);
/* Install new QoS configuration. */
error = new_ops->qos_construct(netdev, details);
ovs_assert((error == 0) == (dev->qos_conf != NULL));
}
} else {
error = new_ops->qos_construct(netdev, details);
ovs_assert((error == 0) == (dev->qos_conf != NULL));
}
ovs_mutex_unlock(&dev->mutex);
return error;
}
/* egress-policer details */
struct egress_policer {
struct qos_conf qos_conf;
struct rte_meter_srtcm_params app_srtcm_params;
struct rte_meter_srtcm egress_meter;
};
static struct egress_policer *
egress_policer_get__(const struct netdev *netdev)
{
struct netdev_dpdk *dev = netdev_dpdk_cast(netdev);
return CONTAINER_OF(dev->qos_conf, struct egress_policer, qos_conf);
}
static int
egress_policer_qos_construct(struct netdev *netdev,
const struct smap *details)
{
struct netdev_dpdk *dev = netdev_dpdk_cast(netdev);
struct egress_policer *policer;
const char *cir_s;
const char *cbs_s;
int err = 0;
rte_spinlock_lock(&dev->qos_lock);
policer = xmalloc(sizeof *policer);
qos_conf_init(&policer->qos_conf, &egress_policer_ops);
dev->qos_conf = &policer->qos_conf;
cir_s = smap_get(details, "cir");
cbs_s = smap_get(details, "cbs");
policer->app_srtcm_params.cir = cir_s ? strtoull(cir_s, NULL, 10) : 0;
policer->app_srtcm_params.cbs = cbs_s ? strtoull(cbs_s, NULL, 10) : 0;
policer->app_srtcm_params.ebs = 0;
err = rte_meter_srtcm_config(&policer->egress_meter,
&policer->app_srtcm_params);
rte_spinlock_unlock(&dev->qos_lock);
return err;
}
static void
egress_policer_qos_destruct(struct netdev *netdev OVS_UNUSED,
struct qos_conf *conf)
{
struct egress_policer *policer = CONTAINER_OF(conf, struct egress_policer,
qos_conf);
free(policer);
}
static int
egress_policer_qos_get(const struct netdev *netdev, struct smap *details)
{
struct egress_policer *policer = egress_policer_get__(netdev);
smap_add_format(details, "cir", "%llu",
1ULL * policer->app_srtcm_params.cir);
smap_add_format(details, "cbs", "%llu",
1ULL * policer->app_srtcm_params.cbs);
return 0;
}
static int
egress_policer_qos_set(struct netdev *netdev, const struct smap *details)
{
struct egress_policer *policer;
const char *cir_s;
const char *cbs_s;
int err = 0;
policer = egress_policer_get__(netdev);
cir_s = smap_get(details, "cir");
cbs_s = smap_get(details, "cbs");
policer->app_srtcm_params.cir = cir_s ? strtoull(cir_s, NULL, 10) : 0;
policer->app_srtcm_params.cbs = cbs_s ? strtoull(cbs_s, NULL, 10) : 0;
policer->app_srtcm_params.ebs = 0;
err = rte_meter_srtcm_config(&policer->egress_meter,
&policer->app_srtcm_params);
return err;
}
static int
egress_policer_run(struct netdev *netdev, struct rte_mbuf **pkts, int pkt_cnt)
{
int cnt = 0;
struct egress_policer *policer = egress_policer_get__(netdev);
cnt = netdev_dpdk_policer_run(&policer->egress_meter, pkts, pkt_cnt);
return cnt;
}
static const struct dpdk_qos_ops egress_policer_ops = {
"egress-policer", /* qos_name */
egress_policer_qos_construct,
egress_policer_qos_destruct,
egress_policer_qos_get,
egress_policer_qos_set,
egress_policer_run
};
static int
netdev_dpdk_reconfigure(struct netdev *netdev)
{
struct netdev_dpdk *dev = netdev_dpdk_cast(netdev);
int err = 0;
ovs_mutex_lock(&dpdk_mutex);
ovs_mutex_lock(&dev->mutex);
if (netdev->n_txq == dev->requested_n_txq
&& netdev->n_rxq == dev->requested_n_rxq) {
/* Reconfiguration is unnecessary */
goto out;
}
rte_eth_dev_stop(dev->port_id);
netdev->n_txq = dev->requested_n_txq;
netdev->n_rxq = dev->requested_n_rxq;
rte_free(dev->tx_q);
err = dpdk_eth_dev_init(dev);
netdev_dpdk_alloc_txq(dev, netdev->n_txq);
dev->txq_needs_locking = netdev->n_txq < dev->requested_n_txq;
out:
ovs_mutex_unlock(&dev->mutex);
ovs_mutex_unlock(&dpdk_mutex);
return err;
}
static int
netdev_dpdk_vhost_user_reconfigure(struct netdev *netdev)
{
struct netdev_dpdk *dev = netdev_dpdk_cast(netdev);
struct virtio_net *virtio_dev = netdev_dpdk_get_virtio(dev);
int err = 0;
ovs_mutex_lock(&dpdk_mutex);
ovs_mutex_lock(&dev->mutex);
netdev->n_txq = dev->requested_n_txq;
netdev->n_rxq = dev->requested_n_rxq;
/* Enable TX queue 0 by default if it wasn't disabled. */
if (dev->tx_q[0].map == OVS_VHOST_QUEUE_MAP_UNKNOWN) {
dev->tx_q[0].map = 0;
}
netdev_dpdk_remap_txqs(dev);
if (dev->requested_socket_id != dev->socket_id) {
dev->socket_id = dev->requested_socket_id;
/* Change mempool to new NUMA Node */
dpdk_mp_put(dev->dpdk_mp);
dev->dpdk_mp = dpdk_mp_get(dev->socket_id, dev->mtu);
if (!dev->dpdk_mp) {
err = ENOMEM;
}
}
if (virtio_dev) {
virtio_dev->flags |= VIRTIO_DEV_RUNNING;
}
ovs_mutex_unlock(&dev->mutex);
ovs_mutex_unlock(&dpdk_mutex);
return err;
}
static int
netdev_dpdk_vhost_cuse_reconfigure(struct netdev *netdev)
{
struct netdev_dpdk *dev = netdev_dpdk_cast(netdev);
ovs_mutex_lock(&dpdk_mutex);
ovs_mutex_lock(&dev->mutex);
netdev->n_txq = dev->requested_n_txq;
netdev->n_rxq = 1;
ovs_mutex_unlock(&dev->mutex);
ovs_mutex_unlock(&dpdk_mutex);
return 0;
}
#define NETDEV_DPDK_CLASS(NAME, INIT, CONSTRUCT, DESTRUCT, \
SET_CONFIG, SET_TX_MULTIQ, SEND, \
GET_CARRIER, GET_STATS, \
GET_FEATURES, GET_STATUS, \
RECONFIGURE, RXQ_RECV) \
{ \
NAME, \
true, /* is_pmd */ \
INIT, /* init */ \
NULL, /* netdev_dpdk_run */ \
NULL, /* netdev_dpdk_wait */ \
\
netdev_dpdk_alloc, \
CONSTRUCT, \
DESTRUCT, \
netdev_dpdk_dealloc, \
netdev_dpdk_get_config, \
SET_CONFIG, \
NULL, /* get_tunnel_config */ \
NULL, /* build header */ \
NULL, /* push header */ \
NULL, /* pop header */ \
netdev_dpdk_get_numa_id, /* get_numa_id */ \
SET_TX_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 */ \
\
netdev_dpdk_set_policing, \
netdev_dpdk_get_qos_types, \
NULL, /* get_qos_capabilities */ \
netdev_dpdk_get_qos, \
netdev_dpdk_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, /* set_in4 */ \
NULL, /* get_addr_list */ \
NULL, /* add_router */ \
NULL, /* get_next_hop */ \
GET_STATUS, \
NULL, /* arp_lookup */ \
\
netdev_dpdk_update_flags, \
RECONFIGURE, \
\
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,
const struct smap *ovs_other_config,
char **new_val)
{
const char *val;
int changed = 0;
val = smap_get(ovs_other_config, flag);
/* Depending on which version of vhost is in use, process the vhost-specific
* flag if it is provided, otherwise resort to default value.
*/
if (val && (strlen(val) <= size)) {
changed = 1;
*new_val = xstrdup(val);
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;
}
static char **
grow_argv(char ***argv, size_t cur_siz, size_t grow_by)
{
return xrealloc(*argv, sizeof(char *) * (cur_siz + grow_by));
}
static void
dpdk_option_extend(char ***argv, int argc, const char *option,
const char *value)
{
char **newargv = grow_argv(argv, argc, 2);
*argv = newargv;
newargv[argc] = xstrdup(option);
newargv[argc+1] = xstrdup(value);
}
static char **
move_argv(char ***argv, size_t cur_size, char **src_argv, size_t src_argc)
{
char **newargv = grow_argv(argv, cur_size, src_argc);
while (src_argc--) {
newargv[cur_size+src_argc] = src_argv[src_argc];
src_argv[src_argc] = NULL;
}
return newargv;
}
static int
extra_dpdk_args(const char *ovs_extra_config, char ***argv, int argc)
{
int ret = argc;
char *release_tok = xstrdup(ovs_extra_config);
char *tok = release_tok, *endptr = NULL;
for (tok = strtok_r(release_tok, " ", &endptr); tok != NULL;
tok = strtok_r(NULL, " ", &endptr)) {
char **newarg = grow_argv(argv, ret, 1);
*argv = newarg;
newarg[ret++] = xstrdup(tok);
}
free(release_tok);
return ret;
}
static bool
argv_contains(char **argv_haystack, const size_t argc_haystack,
const char *needle)
{
for (size_t i = 0; i < argc_haystack; ++i) {
if (!strcmp(argv_haystack[i], needle))
return true;
}
return false;
}
static int
construct_dpdk_options(const struct smap *ovs_other_config,
char ***argv, const int initial_size,
char **extra_args, const size_t extra_argc)
{
struct dpdk_options_map {
const char *ovs_configuration;
const char *dpdk_option;
bool default_enabled;
const char *default_value;
} opts[] = {
{"dpdk-lcore-mask", "-c", false, NULL},
{"dpdk-hugepage-dir", "--huge-dir", false, NULL},
};
int i, ret = initial_size;
/*First, construct from the flat-options (non-mutex)*/
for (i = 0; i < ARRAY_SIZE(opts); ++i) {
const char *lookup = smap_get(ovs_other_config,
opts[i].ovs_configuration);
if (!lookup && opts[i].default_enabled) {
lookup = opts[i].default_value;
}
if (lookup) {
if (!argv_contains(extra_args, extra_argc, opts[i].dpdk_option)) {
dpdk_option_extend(argv, ret, opts[i].dpdk_option, lookup);
ret += 2;
} else {
VLOG_WARN("Ignoring database defined option '%s' due to "
"dpdk_extras config", opts[i].dpdk_option);
}
}
}
return ret;
}
#define MAX_DPDK_EXCL_OPTS 10
static int
construct_dpdk_mutex_options(const struct smap *ovs_other_config,
char ***argv, const int initial_size,
char **extra_args, const size_t extra_argc)
{
struct dpdk_exclusive_options_map {
const char *category;
const char *ovs_dpdk_options[MAX_DPDK_EXCL_OPTS];
const char *eal_dpdk_options[MAX_DPDK_EXCL_OPTS];
const char *default_value;
int default_option;
} excl_opts[] = {
{"memory type",
{"dpdk-alloc-mem", "dpdk-socket-mem", NULL,},
{"-m", "--socket-mem", NULL,},
"1024,0", 1
},
};
int i, ret = initial_size;
for (i = 0; i < ARRAY_SIZE(excl_opts); ++i) {
int found_opts = 0, scan, found_pos = -1;
const char *found_value;
struct dpdk_exclusive_options_map *popt = &excl_opts[i];
for (scan = 0; scan < MAX_DPDK_EXCL_OPTS
&& popt->ovs_dpdk_options[scan]; ++scan) {
const char *lookup = smap_get(ovs_other_config,
popt->ovs_dpdk_options[scan]);
if (lookup && strlen(lookup)) {
found_opts++;
found_pos = scan;
found_value = lookup;
}
}
if (!found_opts) {
if (popt->default_option) {
found_pos = popt->default_option;
found_value = popt->default_value;
} else {
continue;
}
}
if (found_opts > 1) {
VLOG_ERR("Multiple defined options for %s. Please check your"
" database settings and reconfigure if necessary.",
popt->category);
}
if (!argv_contains(extra_args, extra_argc,
popt->eal_dpdk_options[found_pos])) {
dpdk_option_extend(argv, ret, popt->eal_dpdk_options[found_pos],
found_value);
ret += 2;
} else {
VLOG_WARN("Ignoring database defined option '%s' due to "
"dpdk_extras config", popt->eal_dpdk_options[found_pos]);
}
}
return ret;
}
static int
get_dpdk_args(const struct smap *ovs_other_config, char ***argv,
int argc)
{
const char *extra_configuration;
char **extra_args = NULL;
int i;
size_t extra_argc = 0;
extra_configuration = smap_get(ovs_other_config, "dpdk-extra");
if (extra_configuration) {
extra_argc = extra_dpdk_args(extra_configuration, &extra_args, 0);
}
i = construct_dpdk_options(ovs_other_config, argv, argc, extra_args,
extra_argc);
i = construct_dpdk_mutex_options(ovs_other_config, argv, i, extra_args,
extra_argc);
if (extra_configuration) {
*argv = move_argv(argv, i, extra_args, extra_argc);
}
return i + extra_argc;
}
static char **dpdk_argv;
static int dpdk_argc;
static void
deferred_argv_release(void)
{
int result;
for (result = 0; result < dpdk_argc; ++result) {
free(dpdk_argv[result]);
}
free(dpdk_argv);
}
static void
dpdk_init__(const struct smap *ovs_other_config)
{
char **argv = NULL;
int result;
int argc, argc_tmp;
bool auto_determine = true;
int err = 0;
cpu_set_t cpuset;
#ifndef VHOST_CUSE
char *sock_dir_subcomponent;
#endif
if (!smap_get_bool(ovs_other_config, "dpdk-init", false)) {
VLOG_INFO("DPDK Disabled - to change this requires a restart.\n");
return;
}
VLOG_INFO("DPDK Enabled, initializing");
#ifdef VHOST_CUSE
if (process_vhost_flags("cuse-dev-name", xstrdup("vhost-net"),
PATH_MAX, ovs_other_config, &cuse_dev_name)) {
#else
if (process_vhost_flags("vhost-sock-dir", xstrdup(ovs_rundir()),
NAME_MAX, ovs_other_config,
&sock_dir_subcomponent)) {
struct stat s;
if (!strstr(sock_dir_subcomponent, "..")) {
vhost_sock_dir = xasprintf("%s/%s", ovs_rundir(),
sock_dir_subcomponent);
err = stat(vhost_sock_dir, &s);
if (err) {
VLOG_ERR("vhost-user sock directory '%s' does not exist.",
vhost_sock_dir);
}
} else {
vhost_sock_dir = xstrdup(ovs_rundir());
VLOG_ERR("vhost-user sock directory request '%s/%s' has invalid"
"characters '..' - using %s instead.",
ovs_rundir(), sock_dir_subcomponent, ovs_rundir());
}
free(sock_dir_subcomponent);
} else {
vhost_sock_dir = sock_dir_subcomponent;
#endif
}
argv = grow_argv(&argv, 0, 1);
argc = 1;
argv[0] = xstrdup(ovs_get_program_name());
argc_tmp = get_dpdk_args(ovs_other_config, &argv, argc);
while (argc_tmp != argc) {
if (!strcmp("-c", argv[argc]) || !strcmp("-l", argv[argc])) {
auto_determine = false;
break;
}
argc++;
}
argc = argc_tmp;
/**
* NOTE: This is an unsophisticated mechanism for determining the DPDK
* lcore for the DPDK Master.
*/
if (auto_determine) {
int i;
/* Get the main thread affinity */
CPU_ZERO(&cpuset);
err = pthread_getaffinity_np(pthread_self(), sizeof(cpu_set_t),
&cpuset);
if (!err) {
for (i = 0; i < CPU_SETSIZE; i++) {
if (CPU_ISSET(i, &cpuset)) {
argv = grow_argv(&argv, argc, 2);
argv[argc++] = xstrdup("-c");
argv[argc++] = xasprintf("0x%08llX", (1ULL<<i));
i = CPU_SETSIZE;
}
}
} else {
VLOG_ERR("Thread getaffinity error %d. Using core 0x1", err);
/* User did not set dpdk-lcore-mask and unable to get current
* thread affintity - default to core 0x1 */
argv = grow_argv(&argv, argc, 2);
argv[argc++] = xstrdup("-c");
argv[argc++] = xasprintf("0x%X", 1);
}
}
argv = grow_argv(&argv, argc, 1);
argv[argc] = NULL;
optind = 1;
if (VLOG_IS_INFO_ENABLED()) {
struct ds eal_args;
int opt;
ds_init(&eal_args);
ds_put_cstr(&eal_args, "EAL ARGS:");
for (opt = 0; opt < argc; ++opt) {
ds_put_cstr(&eal_args, " ");
ds_put_cstr(&eal_args, argv[opt]);
}
VLOG_INFO("%s", ds_cstr_ro(&eal_args));
ds_destroy(&eal_args);
}
/* Make sure things are initialized ... */
result = rte_eal_init(argc, argv);
if (result < 0) {
ovs_abort(result, "Cannot init EAL");
}
/* Set the main thread affinity back to pre rte_eal_init() value */
if (auto_determine && !err) {
err = pthread_setaffinity_np(pthread_self(), sizeof(cpu_set_t),
&cpuset);
if (err) {
VLOG_ERR("Thread setaffinity error %d", err);
}
}
dpdk_argv = argv;
dpdk_argc = argc;
atexit(deferred_argv_release);
rte_memzone_dump(stdout);
rte_eal_init_ret = 0;
/* We are called from the main thread here */
RTE_PER_LCORE(_lcore_id) = NON_PMD_CORE_ID;
ovs_thread_create("dpdk_watchdog", dpdk_watchdog, NULL);
#ifdef VHOST_CUSE
/* Register CUSE device to handle IOCTLs.
* Unless otherwise specified, 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;
}
#endif
dpdk_vhost_class_init();
/* Finally, register the dpdk classes */
netdev_dpdk_register();
}
void
dpdk_init(const struct smap *ovs_other_config)
{
static struct ovsthread_once once = OVSTHREAD_ONCE_INITIALIZER;
if (ovs_other_config && ovsthread_once_start(&once)) {
dpdk_init__(ovs_other_config);
ovsthread_once_done(&once);
}
}
static const struct netdev_class dpdk_class =
NETDEV_DPDK_CLASS(
"dpdk",
NULL,
netdev_dpdk_construct,
netdev_dpdk_destruct,
netdev_dpdk_set_config,
netdev_dpdk_set_tx_multiq,
netdev_dpdk_eth_send,
netdev_dpdk_get_carrier,
netdev_dpdk_get_stats,
netdev_dpdk_get_features,
netdev_dpdk_get_status,
netdev_dpdk_reconfigure,
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_config,
netdev_dpdk_set_tx_multiq,
netdev_dpdk_ring_send,
netdev_dpdk_get_carrier,
netdev_dpdk_get_stats,
netdev_dpdk_get_features,
netdev_dpdk_get_status,
netdev_dpdk_reconfigure,
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,
NULL,
NULL,
netdev_dpdk_vhost_send,
netdev_dpdk_vhost_get_carrier,
netdev_dpdk_vhost_get_stats,
NULL,
NULL,
netdev_dpdk_vhost_cuse_reconfigure,
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,
NULL,
NULL,
netdev_dpdk_vhost_send,
netdev_dpdk_vhost_get_carrier,
netdev_dpdk_vhost_get_stats,
NULL,
NULL,
netdev_dpdk_vhost_user_reconfigure,
netdev_dpdk_vhost_rxq_recv);
void
netdev_dpdk_register(void)
{
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
}
void
dpdk_set_lcore_id(unsigned cpu)
{
/* 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;
}
static bool
dpdk_thread_is_pmd(void)
{
return rte_lcore_id() != NON_PMD_CORE_ID;
}
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