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ovs/lib/netdev-dpdk.c
Ian Stokes 0bf765f753 netdev_dpdk.c: Add QoS functionality. 
This patch provides the modifications required in netdev-dpdk.c and
vswitch.xml to allow for a DPDK user space QoS algorithm.

This patch adds a QoS configuration structure for netdev-dpdk and
expected QoS operations 'dpdk_qos_ops'. Various helper functions
are also supplied.

Also included are the modifications required for vswitch.xml to allow a
new QoS implementation for netdev-dpdk devices. This includes a new QoS type
`egress-policer` as well as its expected QoS table entries.

The QoS functionality implemented for DPDK devices is `egress-policer`.
This can be used to drop egress packets at a configurable rate.

The INSTALL.DPDK.md guide has also been modified to provide an example
configuration of `egress-policer` QoS.

Signed-off-by: Ian Stokes <ian.stokes@intel.com>
Acked-by: Flavio Leitner <fbl@sysclose.org>
Acked-by: Daniele Di Proietto <diproiettod@vmware.com>
2016-03-02 17:46:27 -08:00

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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 "dirs.h"
#include "dp-packet.h"
#include "dpif-netdev.h"
#include "fatal-signal.h"
#include "list.h"
#include "netdev-dpdk.h"
#include "netdev-provider.h"
#include "netdev-vport.h"
#include "odp-util.h"
#include "ofp-print.h"
#include "ovs-numa.h"
#include "ovs-thread.h"
#include "ovs-rcu.h"
#include "packets.h"
#include "shash.h"
#include "smap.h"
#include "sset.h"
#include "unaligned.h"
#include "timeval.h"
#include "unixctl.h"
#include "openvswitch/vlog.h"
#include "rte_config.h"
#include "rte_mbuf.h"
#include "rte_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);
#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. */
static char *cuse_dev_name = NULL; /* Character device cuse_dev_name. */
static char *vhost_sock_dir = NULL; /* Location of vhost-user sockets */
/*
* Maximum amount of time in micro seconds to try and enqueue to vhost.
*/
#define VHOST_ENQ_RETRY_USECS 100
static const struct rte_eth_conf port_conf = {
.rxmode = {
.mq_mode = ETH_MQ_RX_RSS,
.split_hdr_size = 0,
.header_split = 0, /* Header Split disabled */
.hw_ip_checksum = 0, /* IP checksum offload disabled */
.hw_vlan_filter = 0, /* VLAN filtering disabled */
.jumbo_frame = 0, /* Jumbo Frame Support disabled */
.hw_strip_crc = 0,
},
.rx_adv_conf = {
.rss_conf = {
.rss_key = NULL,
.rss_hf = ETH_RSS_IP | ETH_RSS_UDP | ETH_RSS_TCP,
},
},
.txmode = {
.mq_mode = ETH_MQ_TX_NONE,
},
};
enum { MAX_TX_QUEUE_LEN = 384 };
enum { DPDK_RING_SIZE = 256 };
BUILD_ASSERT_DECL(IS_POW2(DPDK_RING_SIZE));
enum { DRAIN_TSC = 200000ULL };
enum dpdk_dev_type {
DPDK_DEV_ETH = 0,
DPDK_DEV_VHOST = 1,
};
static int rte_eal_init_ret = ENODEV;
static struct ovs_mutex dpdk_mutex = OVS_MUTEX_INITIALIZER;
/* 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. Since dpdk_queue_pkts() and dpdk_queue_flush() may
* use mempools, a non pmd thread should hold this mutex while calling them */
static struct ovs_mutex nonpmd_mempool_mutex = OVS_MUTEX_INITIALIZER;
struct dpdk_mp {
struct rte_mempool *mp;
int mtu;
int socket_id;
int refcount;
struct ovs_list list_node OVS_GUARDED_BY(dpdk_mutex);
};
/* There should be one 'struct dpdk_tx_queue' created for
* each cpu core. */
struct dpdk_tx_queue {
bool flush_tx; /* Set to true to flush queue everytime */
/* pkts are queued. */
int count;
rte_spinlock_t tx_lock; /* Protects the members and the NIC queue
* from concurrent access. It is used only
* if the queue is shared among different
* pmd threads (see 'txq_needs_locking'). */
int map; /* Mapping of configured vhost-user queues
* to enabled by guest. */
uint64_t tsc;
struct rte_mbuf *burst_pkts[MAX_TX_QUEUE_LEN];
};
/* dpdk has no way to remove dpdk ring ethernet devices
so we have to keep them around once they've been created
*/
static struct ovs_list dpdk_ring_list OVS_GUARDED_BY(dpdk_mutex)
= OVS_LIST_INITIALIZER(&dpdk_ring_list);
struct dpdk_ring {
/* For the client rings */
struct rte_ring *cring_tx;
struct rte_ring *cring_rx;
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 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;
/* The user might request more txqs than the NIC has. We remap those
* ('up.n_txq') on these ('real_n_txq').
* If the numbers match, 'txq_needs_locking' is false, otherwise it is
* true and we will take a spinlock on transmission */
int real_n_txq;
int real_n_rxq;
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;
};
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);
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_seg(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 );
}
list_push_back(&dpdk_mp_list, &dmp->list_node);
return dmp;
}
static void
dpdk_mp_put(struct dpdk_mp *dmp)
{
if (!dmp) {
return;
}
dmp->refcount--;
ovs_assert(dmp->refcount >= 0);
#if 0
/* I could not find any API to destroy mp. */
if (dmp->refcount == 0) {
list_delete(dmp->list_node);
/* destroy mp-pool. */
}
#endif
}
static void
check_link_status(struct netdev_dpdk *dev)
{
struct rte_eth_link link;
rte_eth_link_get_nowait(dev->port_id, &link);
if (dev->link.link_status != link.link_status) {
netdev_change_seq_changed(&dev->up);
dev->link_reset_cnt++;
dev->link = link;
if (dev->link.link_status) {
VLOG_DBG_RL(&rl, "Port %d Link Up - speed %u Mbps - %s",
dev->port_id, (unsigned)dev->link.link_speed,
(dev->link.link_duplex == ETH_LINK_FULL_DUPLEX) ?
("full-duplex") : ("half-duplex"));
} else {
VLOG_DBG_RL(&rl, "Port %d Link Down", dev->port_id);
}
}
}
static void *
dpdk_watchdog(void *dummy OVS_UNUSED)
{
struct netdev_dpdk *dev;
pthread_detach(pthread_self());
for (;;) {
ovs_mutex_lock(&dpdk_mutex);
LIST_FOR_EACH (dev, list_node, &dpdk_list) {
ovs_mutex_lock(&dev->mutex);
check_link_status(dev);
ovs_mutex_unlock(&dev->mutex);
}
ovs_mutex_unlock(&dpdk_mutex);
xsleep(DPDK_PORT_WATCHDOG_INTERVAL);
}
return NULL;
}
static int
dpdk_eth_dev_queue_setup(struct netdev_dpdk *dev, int n_rxq, int n_txq)
{
int diag = 0;
int i;
/* A device may report more queues than it makes available (this has
* been observed for Intel xl710, which reserves some of them for
* SRIOV): rte_eth_*_queue_setup will fail if a queue is not
* available. When this happens we can retry the configuration
* and request less queues */
while (n_rxq && n_txq) {
if (diag) {
VLOG_INFO("Retrying setup with (rxq:%d txq:%d)", n_rxq, n_txq);
}
diag = rte_eth_dev_configure(dev->port_id, n_rxq, n_txq, &port_conf);
if (diag) {
break;
}
for (i = 0; i < n_txq; i++) {
diag = rte_eth_tx_queue_setup(dev->port_id, i, NIC_PORT_TX_Q_SIZE,
dev->socket_id, NULL);
if (diag) {
VLOG_INFO("Interface %s txq(%d) setup error: %s",
dev->up.name, i, rte_strerror(-diag));
break;
}
}
if (i != n_txq) {
/* Retry with less tx queues */
n_txq = i;
continue;
}
for (i = 0; i < n_rxq; i++) {
diag = rte_eth_rx_queue_setup(dev->port_id, i, NIC_PORT_RX_Q_SIZE,
dev->socket_id, NULL,
dev->dpdk_mp->mp);
if (diag) {
VLOG_INFO("Interface %s rxq(%d) setup error: %s",
dev->up.name, i, rte_strerror(-diag));
break;
}
}
if (i != n_rxq) {
/* Retry with less rx queues */
n_rxq = i;
continue;
}
dev->up.n_rxq = n_rxq;
dev->real_n_txq = n_txq;
return 0;
}
return diag;
}
static int
dpdk_eth_dev_init(struct netdev_dpdk *dev) OVS_REQUIRES(dpdk_mutex)
{
struct rte_pktmbuf_pool_private *mbp_priv;
struct rte_eth_dev_info info;
struct ether_addr eth_addr;
int diag;
int n_rxq, n_txq;
if (dev->port_id < 0 || dev->port_id >= rte_eth_dev_count()) {
return ENODEV;
}
rte_eth_dev_info_get(dev->port_id, &info);
n_rxq = MIN(info.max_rx_queues, dev->up.n_rxq);
n_txq = MIN(info.max_tx_queues, dev->up.n_txq);
diag = dpdk_eth_dev_queue_setup(dev, n_rxq, n_txq);
if (diag) {
VLOG_ERR("Interface %s(rxq:%d txq:%d) configure error: %s",
dev->up.name, n_rxq, n_txq, rte_strerror(-diag));
return -diag;
}
diag = rte_eth_dev_start(dev->port_id);
if (diag) {
VLOG_ERR("Interface %s start error: %s", dev->up.name,
rte_strerror(-diag));
return -diag;
}
rte_eth_promiscuous_enable(dev->port_id);
rte_eth_allmulticast_enable(dev->port_id);
memset(&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 *netdev = dpdk_rte_mzalloc(sizeof *netdev);
return &netdev->up;
}
static void
netdev_dpdk_alloc_txq(struct netdev_dpdk *netdev, unsigned int n_txqs)
{
unsigned i;
netdev->tx_q = dpdk_rte_mzalloc(n_txqs * sizeof *netdev->tx_q);
for (i = 0; i < n_txqs; i++) {
int numa_id = ovs_numa_get_numa_id(i);
if (!netdev->txq_needs_locking) {
/* Each index is considered as a cpu core id, since there should
* be one tx queue for each cpu core. If the corresponding core
* is not on the same numa node as 'netdev', flags the
* 'flush_tx'. */
netdev->tx_q[i].flush_tx = netdev->socket_id == numa_id;
} else {
/* Queues are shared among CPUs. Always flush */
netdev->tx_q[i].flush_tx = true;
}
/* Initialize map for vhost devices. */
netdev->tx_q[i].map = -1;
rte_spinlock_init(&netdev->tx_q[i].tx_lock);
}
}
static int
netdev_dpdk_init(struct netdev *netdev_, unsigned int port_no,
enum dpdk_dev_type type)
OVS_REQUIRES(dpdk_mutex)
{
struct netdev_dpdk *netdev = netdev_dpdk_cast(netdev_);
int sid;
int err = 0;
uint32_t buf_size;
ovs_mutex_init(&netdev->mutex);
ovs_mutex_lock(&netdev->mutex);
rte_spinlock_init(&netdev->stats_lock);
/* If the 'sid' is negative, it means that the kernel fails
* to obtain the pci numa info. In that situation, always
* use 'SOCKET0'. */
if (type == DPDK_DEV_ETH) {
sid = rte_eth_dev_socket_id(port_no);
} else {
sid = rte_lcore_to_socket_id(rte_get_master_lcore());
}
netdev->socket_id = sid < 0 ? SOCKET0 : sid;
netdev->port_id = port_no;
netdev->type = type;
netdev->flags = 0;
netdev->mtu = ETHER_MTU;
netdev->max_packet_len = MTU_TO_FRAME_LEN(netdev->mtu);
buf_size = dpdk_buf_size(netdev->mtu);
netdev->dpdk_mp = dpdk_mp_get(netdev->socket_id, FRAME_LEN_TO_MTU(buf_size));
if (!netdev->dpdk_mp) {
err = ENOMEM;
goto unlock;
}
/* Initialise QoS configuration to NULL and qos lock to unlocked */
netdev->qos_conf = NULL;
rte_spinlock_init(&netdev->qos_lock);
netdev_->n_txq = NR_QUEUE;
netdev_->n_rxq = NR_QUEUE;
netdev_->requested_n_rxq = NR_QUEUE;
netdev->real_n_txq = NR_QUEUE;
if (type == DPDK_DEV_ETH) {
netdev_dpdk_alloc_txq(netdev, NR_QUEUE);
err = dpdk_eth_dev_init(netdev);
if (err) {
goto unlock;
}
} else {
netdev_dpdk_alloc_txq(netdev, OVS_VHOST_MAX_QUEUE_NUM);
}
list_push_back(&dpdk_list, &netdev->list_node);
unlock:
if (err) {
rte_free(netdev->tx_q);
}
ovs_mutex_unlock(&netdev->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 *netdev = netdev_dpdk_cast(netdev_);
int err;
ovs_mutex_lock(&dpdk_mutex);
strncpy(netdev->vhost_id, netdev->up.name, sizeof(netdev->vhost_id));
err = vhost_construct_helper(netdev_);
ovs_mutex_unlock(&dpdk_mutex);
return err;
}
static int
netdev_dpdk_vhost_user_construct(struct netdev *netdev_)
{
struct netdev_dpdk *netdev = netdev_dpdk_cast(netdev_);
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;
}
ovs_mutex_lock(&dpdk_mutex);
/* Take the name of the vhost-user port and append it to the location where
* the socket is to be created, then register the socket.
*/
snprintf(netdev->vhost_id, sizeof(netdev->vhost_id), "%s/%s",
vhost_sock_dir, name);
err = rte_vhost_driver_register(netdev->vhost_id);
if (err) {
VLOG_ERR("vhost-user socket device setup failure for socket %s\n",
netdev->vhost_id);
} else {
fatal_signal_add_file_to_unlink(netdev->vhost_id);
VLOG_INFO("Socket %s created for vhost-user port %s\n",
netdev->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);
ovs_mutex_unlock(&dev->mutex);
ovs_mutex_lock(&dpdk_mutex);
rte_free(dev->tx_q);
list_remove(&dev->list_node);
dpdk_mp_put(dev->dpdk_mp);
ovs_mutex_unlock(&dpdk_mutex);
}
static void
netdev_dpdk_vhost_destruct(struct netdev *netdev_)
{
struct netdev_dpdk *dev = netdev_dpdk_cast(netdev_);
/* Can't remove a port while a guest is attached to it. */
if (netdev_dpdk_get_virtio(dev) != NULL) {
VLOG_ERR("Can not remove port, vhost device still attached");
return;
}
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(&dpdk_mutex);
list_remove(&dev->list_node);
dpdk_mp_put(dev->dpdk_mp);
ovs_mutex_unlock(&dpdk_mutex);
}
static void
netdev_dpdk_dealloc(struct netdev *netdev_)
{
struct netdev_dpdk *netdev = netdev_dpdk_cast(netdev_);
rte_free(netdev);
}
static int
netdev_dpdk_get_config(const struct netdev *netdev, struct smap *args)
{
struct netdev_dpdk *dev = netdev_dpdk_cast(netdev);
ovs_mutex_lock(&dev->mutex);
smap_add_format(args, "requested_rx_queues", "%d", netdev->requested_n_rxq);
smap_add_format(args, "configured_rx_queues", "%d", netdev->n_rxq);
smap_add_format(args, "requested_tx_queues", "%d", netdev->n_txq);
smap_add_format(args, "configured_tx_queues", "%d", dev->real_n_txq);
ovs_mutex_unlock(&dev->mutex);
return 0;
}
static int
netdev_dpdk_set_config(struct netdev *netdev, const struct smap *args)
{
struct netdev_dpdk *dev = netdev_dpdk_cast(netdev);
ovs_mutex_lock(&dev->mutex);
netdev->requested_n_rxq = MAX(smap_get_int(args, "n_rxq",
netdev->requested_n_rxq), 1);
netdev_change_seq_changed(netdev);
ovs_mutex_unlock(&dev->mutex);
return 0;
}
static int
netdev_dpdk_get_numa_id(const struct netdev *netdev_)
{
struct netdev_dpdk *netdev = netdev_dpdk_cast(netdev_);
return netdev->socket_id;
}
/* Sets the number of tx queues and rx queues for the dpdk interface.
* If the configuration fails, do not try restoring its old configuration
* and just returns the error. */
static int
netdev_dpdk_set_multiq(struct netdev *netdev_, unsigned int n_txq,
unsigned int n_rxq)
{
struct netdev_dpdk *netdev = netdev_dpdk_cast(netdev_);
int err = 0;
int old_rxq, old_txq;
if (netdev->up.n_txq == n_txq && netdev->up.n_rxq == n_rxq) {
return err;
}
ovs_mutex_lock(&dpdk_mutex);
ovs_mutex_lock(&netdev->mutex);
rte_eth_dev_stop(netdev->port_id);
old_txq = netdev->up.n_txq;
old_rxq = netdev->up.n_rxq;
netdev->up.n_txq = n_txq;
netdev->up.n_rxq = n_rxq;
rte_free(netdev->tx_q);
err = dpdk_eth_dev_init(netdev);
netdev_dpdk_alloc_txq(netdev, netdev->real_n_txq);
if (err) {
/* If there has been an error, it means that the requested queues
* have not been created. Restore the old numbers. */
netdev->up.n_txq = old_txq;
netdev->up.n_rxq = old_rxq;
}
netdev->txq_needs_locking = netdev->real_n_txq != netdev->up.n_txq;
ovs_mutex_unlock(&netdev->mutex);
ovs_mutex_unlock(&dpdk_mutex);
return err;
}
static int
netdev_dpdk_vhost_cuse_set_multiq(struct netdev *netdev_, unsigned int n_txq,
unsigned int n_rxq)
{
struct netdev_dpdk *netdev = netdev_dpdk_cast(netdev_);
int err = 0;
if (netdev->up.n_txq == n_txq && netdev->up.n_rxq == n_rxq) {
return err;
}
ovs_mutex_lock(&dpdk_mutex);
ovs_mutex_lock(&netdev->mutex);
netdev->up.n_txq = n_txq;
netdev->real_n_txq = 1;
netdev->up.n_rxq = 1;
netdev->txq_needs_locking = netdev->real_n_txq != netdev->up.n_txq;
ovs_mutex_unlock(&netdev->mutex);
ovs_mutex_unlock(&dpdk_mutex);
return err;
}
static int
netdev_dpdk_vhost_set_multiq(struct netdev *netdev_, unsigned int n_txq,
unsigned int n_rxq)
{
struct netdev_dpdk *netdev = netdev_dpdk_cast(netdev_);
int err = 0;
if (netdev->up.n_txq == n_txq && netdev->up.n_rxq == n_rxq) {
return err;
}
ovs_mutex_lock(&dpdk_mutex);
ovs_mutex_lock(&netdev->mutex);
netdev->up.n_txq = n_txq;
netdev->up.n_rxq = n_rxq;
ovs_mutex_unlock(&netdev->mutex);
ovs_mutex_unlock(&dpdk_mutex);
return err;
}
static struct netdev_rxq *
netdev_dpdk_rxq_alloc(void)
{
struct netdev_rxq_dpdk *rx = dpdk_rte_mzalloc(sizeof *rx);
return &rx->up;
}
static struct netdev_rxq_dpdk *
netdev_rxq_dpdk_cast(const struct netdev_rxq *rx)
{
return CONTAINER_OF(rx, struct netdev_rxq_dpdk, up);
}
static int
netdev_dpdk_rxq_construct(struct netdev_rxq *rxq_)
{
struct netdev_rxq_dpdk *rx = netdev_rxq_dpdk_cast(rxq_);
struct netdev_dpdk *netdev = netdev_dpdk_cast(rx->up.netdev);
ovs_mutex_lock(&netdev->mutex);
rx->port_id = netdev->port_id;
ovs_mutex_unlock(&netdev->mutex);
return 0;
}
static void
netdev_dpdk_rxq_destruct(struct netdev_rxq *rxq_ OVS_UNUSED)
{
}
static void
netdev_dpdk_rxq_dealloc(struct netdev_rxq *rxq_)
{
struct netdev_rxq_dpdk *rx = netdev_rxq_dpdk_cast(rxq_);
rte_free(rx);
}
static inline void
dpdk_queue_flush__(struct netdev_dpdk *dev, int qid)
{
struct dpdk_tx_queue *txq = &dev->tx_q[qid];
uint32_t nb_tx = 0;
while (nb_tx != txq->count) {
uint32_t ret;
ret = rte_eth_tx_burst(dev->port_id, qid, txq->burst_pkts + nb_tx,
txq->count - nb_tx);
if (!ret) {
break;
}
nb_tx += ret;
}
if (OVS_UNLIKELY(nb_tx != txq->count)) {
/* free buffers, which we couldn't transmit, one at a time (each
* packet could come from a different mempool) */
int i;
for (i = nb_tx; i < txq->count; i++) {
rte_pktmbuf_free_seg(txq->burst_pkts[i]);
}
rte_spinlock_lock(&dev->stats_lock);
dev->stats.tx_dropped += txq->count-nb_tx;
rte_spinlock_unlock(&dev->stats_lock);
}
txq->count = 0;
txq->tsc = rte_get_timer_cycles();
}
static inline void
dpdk_queue_flush(struct netdev_dpdk *dev, int qid)
{
struct dpdk_tx_queue *txq = &dev->tx_q[qid];
if (txq->count == 0) {
return;
}
dpdk_queue_flush__(dev, qid);
}
static bool
is_vhost_running(struct virtio_net *dev)
{
return (dev != NULL && (dev->flags & VIRTIO_DEV_RUNNING));
}
static inline void
netdev_dpdk_vhost_update_rx_counters(struct netdev_stats *stats,
struct dp_packet **packets, int count)
{
int i;
struct dp_packet *packet;
stats->rx_packets += count;
for (i = 0; i < count; i++) {
packet = packets[i];
if (OVS_UNLIKELY(dp_packet_size(packet) < 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;
}
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 += dp_packet_size(packet);
}
}
/*
* The receive path for the vhost port is the TX path out from guest.
*/
static int
netdev_dpdk_vhost_rxq_recv(struct netdev_rxq *rxq_,
struct dp_packet **packets, int *c)
{
struct netdev_rxq_dpdk *rx = netdev_rxq_dpdk_cast(rxq_);
struct netdev *netdev = rx->up.netdev;
struct netdev_dpdk *vhost_dev = netdev_dpdk_cast(netdev);
struct virtio_net *virtio_dev = netdev_dpdk_get_virtio(vhost_dev);
int qid = rxq_->queue_id;
uint16_t nb_rx = 0;
if (OVS_UNLIKELY(!is_vhost_running(virtio_dev))) {
return EAGAIN;
}
if (rxq_->queue_id >= vhost_dev->real_n_rxq) {
return EOPNOTSUPP;
}
nb_rx = rte_vhost_dequeue_burst(virtio_dev, qid * VIRTIO_QNUM + VIRTIO_TXQ,
vhost_dev->dpdk_mp->mp,
(struct rte_mbuf **)packets,
NETDEV_MAX_BURST);
if (!nb_rx) {
return EAGAIN;
}
rte_spinlock_lock(&vhost_dev->stats_lock);
netdev_dpdk_vhost_update_rx_counters(&vhost_dev->stats, packets, nb_rx);
rte_spinlock_unlock(&vhost_dev->stats_lock);
*c = (int) nb_rx;
return 0;
}
static int
netdev_dpdk_rxq_recv(struct netdev_rxq *rxq_, struct dp_packet **packets,
int *c)
{
struct netdev_rxq_dpdk *rx = netdev_rxq_dpdk_cast(rxq_);
struct netdev *netdev = rx->up.netdev;
struct netdev_dpdk *dev = netdev_dpdk_cast(netdev);
int nb_rx;
/* There is only one tx queue for this core. Do not flush other
* queues.
* Do not flush tx queue which is shared among CPUs
* since it is always flushed */
if (rxq_->queue_id == rte_lcore_id() &&
OVS_LIKELY(!dev->txq_needs_locking)) {
dpdk_queue_flush(dev, rxq_->queue_id);
}
nb_rx = rte_eth_rx_burst(rx->port_id, rxq_->queue_id,
(struct rte_mbuf **) packets,
NETDEV_MAX_BURST);
if (!nb_rx) {
return EAGAIN;
}
*c = nb_rx;
return 0;
}
static 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 *vhost_dev = netdev_dpdk_cast(netdev);
struct virtio_net *virtio_dev = netdev_dpdk_get_virtio(vhost_dev);
struct rte_mbuf **cur_pkts = (struct rte_mbuf **) pkts;
unsigned int total_pkts = cnt;
unsigned int qos_pkts = cnt;
uint64_t start = 0;
qid = vhost_dev->tx_q[qid % vhost_dev->real_n_txq].map;
if (OVS_UNLIKELY(!is_vhost_running(virtio_dev) || qid == -1)) {
rte_spinlock_lock(&vhost_dev->stats_lock);
vhost_dev->stats.tx_dropped+= cnt;
rte_spinlock_unlock(&vhost_dev->stats_lock);
goto out;
}
rte_spinlock_lock(&vhost_dev->tx_q[qid].tx_lock);
/* Check has QoS has been configured for the netdev */
cnt = netdev_dpdk_qos_run__(vhost_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 next iteration.*/
cur_pkts = &cur_pkts[tx_pkts];
} else {
uint64_t timeout = VHOST_ENQ_RETRY_USECS * rte_get_timer_hz() / 1E6;
unsigned int expired = 0;
if (!start) {
start = rte_get_timer_cycles();
}
/*
* Unable to enqueue packets to vhost interface.
* Check available entries before retrying.
*/
while (!rte_vring_available_entries(virtio_dev, vhost_qid)) {
if (OVS_UNLIKELY((rte_get_timer_cycles() - start) > timeout)) {
expired = 1;
break;
}
}
if (expired) {
/* break out of main loop. */
break;
}
}
} while (cnt);
rte_spinlock_unlock(&vhost_dev->tx_q[qid].tx_lock);
rte_spinlock_lock(&vhost_dev->stats_lock);
cnt += qos_pkts;
netdev_dpdk_vhost_update_tx_counters(&vhost_dev->stats, pkts, total_pkts,
cnt);
rte_spinlock_unlock(&vhost_dev->stats_lock);
out:
if (may_steal) {
int i;
for (i = 0; i < total_pkts; i++) {
dp_packet_delete(pkts[i]);
}
}
}
inline static void
dpdk_queue_pkts(struct netdev_dpdk *dev, int qid,
struct rte_mbuf **pkts, int cnt)
{
struct dpdk_tx_queue *txq = &dev->tx_q[qid];
uint64_t diff_tsc;
int i = 0;
while (i < cnt) {
int freeslots = MAX_TX_QUEUE_LEN - txq->count;
int tocopy = MIN(freeslots, cnt-i);
memcpy(&txq->burst_pkts[txq->count], &pkts[i],
tocopy * sizeof (struct rte_mbuf *));
txq->count += tocopy;
i += tocopy;
if (txq->count == MAX_TX_QUEUE_LEN || txq->flush_tx) {
dpdk_queue_flush__(dev, qid);
}
diff_tsc = rte_get_timer_cycles() - txq->tsc;
if (diff_tsc >= DRAIN_TSC) {
dpdk_queue_flush__(dev, qid);
}
}
}
/* Tx function. Transmit packets indefinitely */
static void
dpdk_do_tx_copy(struct netdev *netdev, int qid, struct dp_packet **pkts,
int cnt)
OVS_NO_THREAD_SAFETY_ANALYSIS
{
#if !defined(__CHECKER__) && !defined(_WIN32)
const size_t PKT_ARRAY_SIZE = cnt;
#else
/* Sparse or MSVC doesn't like variable length array. */
enum { PKT_ARRAY_SIZE = NETDEV_MAX_BURST };
#endif
struct netdev_dpdk *dev = netdev_dpdk_cast(netdev);
struct rte_mbuf *mbufs[PKT_ARRAY_SIZE];
int dropped = 0;
int newcnt = 0;
int i;
/* If we are on a non pmd thread we have to use the mempool mutex, because
* every non pmd thread shares the same mempool cache */
if (!dpdk_thread_is_pmd()) {
ovs_mutex_lock(&nonpmd_mempool_mutex);
}
for (i = 0; i < cnt; i++) {
int size = dp_packet_size(pkts[i]);
if (OVS_UNLIKELY(size > dev->max_packet_len)) {
VLOG_WARN_RL(&rl, "Too big size %d max_packet_len %d",
(int)size , dev->max_packet_len);
dropped++;
continue;
}
mbufs[newcnt] = rte_pktmbuf_alloc(dev->dpdk_mp->mp);
if (!mbufs[newcnt]) {
dropped += cnt - i;
break;
}
/* We have to do a copy for now */
memcpy(rte_pktmbuf_mtod(mbufs[newcnt], void *), dp_packet_data(pkts[i]), size);
rte_pktmbuf_data_len(mbufs[newcnt]) = size;
rte_pktmbuf_pkt_len(mbufs[newcnt]) = size;
newcnt++;
}
if (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;
dpdk_queue_pkts(dev, qid, mbufs, newcnt);
dpdk_queue_flush(dev, qid);
}
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 **pkts,
int cnt, bool may_steal)
{
if (OVS_UNLIKELY(pkts[0]->source != DPBUF_DPDK)) {
int i;
dpdk_do_tx_copy(netdev, qid, pkts, cnt);
if (may_steal) {
for (i = 0; i < cnt; i++) {
dp_packet_delete(pkts[i]);
}
}
} else {
__netdev_dpdk_vhost_send(netdev, qid, pkts, cnt, may_steal);
}
return 0;
}
static inline void
netdev_dpdk_send__(struct netdev_dpdk *dev, int qid,
struct dp_packet **pkts, int cnt, bool may_steal)
{
int i;
if (OVS_UNLIKELY(dev->txq_needs_locking)) {
qid = qid % dev->real_n_txq;
rte_spinlock_lock(&dev->tx_q[qid].tx_lock);
}
if (OVS_UNLIKELY(!may_steal ||
pkts[0]->source != DPBUF_DPDK)) {
struct netdev *netdev = &dev->up;
dpdk_do_tx_copy(netdev, qid, pkts, cnt);
if (may_steal) {
for (i = 0; i < cnt; i++) {
dp_packet_delete(pkts[i]);
}
}
} else {
int next_tx_idx = 0;
int dropped = 0;
unsigned int qos_pkts = 0;
unsigned int temp_cnt = 0;
for (i = 0; i < cnt; i++) {
int size = dp_packet_size(pkts[i]);
if (OVS_UNLIKELY(size > dev->max_packet_len)) {
if (next_tx_idx != i) {
temp_cnt = i - next_tx_idx;
qos_pkts = temp_cnt;
temp_cnt = netdev_dpdk_qos_run__(dev, (struct rte_mbuf**)pkts,
temp_cnt);
dropped += qos_pkts - temp_cnt;
dpdk_queue_pkts(dev, qid,
(struct rte_mbuf **)&pkts[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(pkts[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**)pkts, cnt);
dropped += qos_pkts - cnt;
dpdk_queue_pkts(dev, qid, (struct rte_mbuf **)&pkts[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 **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 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);
memset(stats, 0, sizeof(*stats));
/* Unsupported Stats */
stats->collisions = UINT64_MAX;
stats->rx_crc_errors = UINT64_MAX;
stats->rx_fifo_errors = UINT64_MAX;
stats->rx_frame_errors = UINT64_MAX;
stats->rx_missed_errors = UINT64_MAX;
stats->rx_over_errors = UINT64_MAX;
stats->tx_aborted_errors = UINT64_MAX;
stats->tx_carrier_errors = UINT64_MAX;
stats->tx_errors = UINT64_MAX;
stats->tx_fifo_errors = UINT64_MAX;
stats->tx_heartbeat_errors = UINT64_MAX;
stats->tx_window_errors = UINT64_MAX;
stats->rx_dropped += UINT64_MAX;
rte_spinlock_lock(&dev->stats_lock);
/* Supported Stats */
stats->rx_packets += dev->stats.rx_packets;
stats->tx_packets += dev->stats.tx_packets;
stats->tx_dropped += dev->stats.tx_dropped;
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;
rte_spinlock_unlock(&dev->stats_lock);
ovs_mutex_unlock(&dev->mutex);
return 0;
}
static int
netdev_dpdk_get_stats(const struct netdev *netdev, struct netdev_stats *stats)
{
struct netdev_dpdk *dev = netdev_dpdk_cast(netdev);
struct rte_eth_stats rte_stats;
bool gg;
netdev_dpdk_get_carrier(netdev, &gg);
ovs_mutex_lock(&dev->mutex);
rte_eth_stats_get(dev->port_id, &rte_stats);
memset(stats, 0, sizeof(*stats));
stats->rx_packets = rte_stats.ipackets;
stats->tx_packets = rte_stats.opackets;
stats->rx_bytes = rte_stats.ibytes;
stats->tx_bytes = rte_stats.obytes;
/* 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;
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->collisions = UINT64_MAX;
stats->rx_length_errors = UINT64_MAX;
stats->rx_over_errors = UINT64_MAX;
stats->rx_crc_errors = UINT64_MAX;
stats->rx_frame_errors = UINT64_MAX;
stats->rx_fifo_errors = UINT64_MAX;
stats->rx_missed_errors = rte_stats.imissed;
stats->tx_aborted_errors = UINT64_MAX;
stats->tx_carrier_errors = UINT64_MAX;
stats->tx_fifo_errors = UINT64_MAX;
stats->tx_heartbeat_errors = UINT64_MAX;
stats->tx_window_errors = UINT64_MAX;
ovs_mutex_unlock(&dev->mutex);
return 0;
}
static int
netdev_dpdk_get_features(const struct netdev *netdev_,
enum netdev_features *current,
enum netdev_features *advertised OVS_UNUSED,
enum netdev_features *supported OVS_UNUSED,
enum netdev_features *peer OVS_UNUSED)
{
struct netdev_dpdk *dev = netdev_dpdk_cast(netdev_);
struct rte_eth_link link;
ovs_mutex_lock(&dev->mutex);
link = dev->link;
ovs_mutex_unlock(&dev->mutex);
if (link.link_duplex == ETH_LINK_AUTONEG_DUPLEX) {
if (link.link_speed == ETH_LINK_SPEED_AUTONEG) {
*current = NETDEV_F_AUTONEG;
}
} else if (link.link_duplex == ETH_LINK_HALF_DUPLEX) {
if (link.link_speed == ETH_LINK_SPEED_10) {
*current = NETDEV_F_10MB_HD;
}
if (link.link_speed == ETH_LINK_SPEED_100) {
*current = NETDEV_F_100MB_HD;
}
if (link.link_speed == ETH_LINK_SPEED_1000) {
*current = NETDEV_F_1GB_HD;
}
} else if (link.link_duplex == ETH_LINK_FULL_DUPLEX) {
if (link.link_speed == ETH_LINK_SPEED_10) {
*current = NETDEV_F_10MB_FD;
}
if (link.link_speed == ETH_LINK_SPEED_100) {
*current = NETDEV_F_100MB_FD;
}
if (link.link_speed == ETH_LINK_SPEED_1000) {
*current = NETDEV_F_1GB_FD;
}
if (link.link_speed == ETH_LINK_SPEED_10000) {
*current = NETDEV_F_10GB_FD;
}
}
return 0;
}
static int
netdev_dpdk_get_ifindex(const struct netdev *netdev)
{
struct netdev_dpdk *dev = netdev_dpdk_cast(netdev);
int ifindex;
ovs_mutex_lock(&dev->mutex);
ifindex = dev->port_id;
ovs_mutex_unlock(&dev->mutex);
return ifindex;
}
static int
netdev_dpdk_get_carrier(const struct netdev *netdev_, bool *carrier)
{
struct netdev_dpdk *dev = netdev_dpdk_cast(netdev_);
ovs_mutex_lock(&dev->mutex);
check_link_status(dev);
*carrier = dev->link.link_status;
ovs_mutex_unlock(&dev->mutex);
return 0;
}
static int
netdev_dpdk_vhost_get_carrier(const struct netdev *netdev_, bool *carrier)
{
struct netdev_dpdk *dev = netdev_dpdk_cast(netdev_);
struct virtio_net *virtio_dev = netdev_dpdk_get_virtio(dev);
ovs_mutex_lock(&dev->mutex);
if (is_vhost_running(virtio_dev)) {
*carrier = 1;
} else {
*carrier = 0;
}
ovs_mutex_unlock(&dev->mutex);
return 0;
}
static long long int
netdev_dpdk_get_carrier_resets(const struct netdev *netdev_)
{
struct netdev_dpdk *dev = netdev_dpdk_cast(netdev_);
long long int carrier_resets;
ovs_mutex_lock(&dev->mutex);
carrier_resets = dev->link_reset_cnt;
ovs_mutex_unlock(&dev->mutex);
return carrier_resets;
}
static int
netdev_dpdk_set_miimon(struct netdev *netdev_ OVS_UNUSED,
long long int interval OVS_UNUSED)
{
return EOPNOTSUPP;
}
static int
netdev_dpdk_update_flags__(struct netdev_dpdk *dev,
enum netdev_flags off, enum netdev_flags on,
enum netdev_flags *old_flagsp) OVS_REQUIRES(dev->mutex)
{
int err;
if ((off | on) & ~(NETDEV_UP | NETDEV_PROMISC)) {
return EINVAL;
}
*old_flagsp = dev->flags;
dev->flags |= on;
dev->flags &= ~off;
if (dev->flags == *old_flagsp) {
return 0;
}
if (dev->type == DPDK_DEV_ETH) {
if (dev->flags & NETDEV_UP) {
err = rte_eth_dev_start(dev->port_id);
if (err)
return -err;
}
if (dev->flags & NETDEV_PROMISC) {
rte_eth_promiscuous_enable(dev->port_id);
}
if (!(dev->flags & NETDEV_UP)) {
rte_eth_dev_stop(dev->port_id);
}
}
return 0;
}
static int
netdev_dpdk_update_flags(struct netdev *netdev_,
enum netdev_flags off, enum netdev_flags on,
enum netdev_flags *old_flagsp)
{
struct netdev_dpdk *netdev = netdev_dpdk_cast(netdev_);
int error;
ovs_mutex_lock(&netdev->mutex);
error = netdev_dpdk_update_flags__(netdev, off, on, old_flagsp);
ovs_mutex_unlock(&netdev->mutex);
return error;
}
static int
netdev_dpdk_get_status(const struct netdev *netdev_, struct smap *args)
{
struct netdev_dpdk *dev = netdev_dpdk_cast(netdev_);
struct rte_eth_dev_info dev_info;
if (dev->port_id < 0)
return ENODEV;
ovs_mutex_lock(&dev->mutex);
rte_eth_dev_info_get(dev->port_id, &dev_info);
ovs_mutex_unlock(&dev->mutex);
smap_add_format(args, "driver_name", "%s", dev_info.driver_name);
smap_add_format(args, "port_no", "%d", dev->port_id);
smap_add_format(args, "numa_id", "%d", rte_eth_dev_socket_id(dev->port_id));
smap_add_format(args, "driver_name", "%s", dev_info.driver_name);
smap_add_format(args, "min_rx_bufsize", "%u", dev_info.min_rx_bufsize);
smap_add_format(args, "max_rx_pktlen", "%u", dev->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 *dev)
{
uint32_t i;
uint64_t idx;
for (i = 0; i < dev->virt_qp_nb; i++) {
idx = i * VIRTIO_QNUM;
rte_vhost_enable_guest_notification(dev, idx + VIRTIO_RXQ, 0);
rte_vhost_enable_guest_notification(dev, idx + VIRTIO_TXQ, 0);
}
}
/*
* Fixes mapping for vhost-user tx queues. Must be called after each
* enabling/disabling of queues and real_n_txq modifications.
*/
static void
netdev_dpdk_remap_txqs(struct netdev_dpdk *netdev)
OVS_REQUIRES(netdev->mutex)
{
int *enabled_queues, n_enabled = 0;
int i, k, total_txqs = netdev->real_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 (netdev->tx_q[i].map == i) {
enabled_queues[n_enabled++] = i;
}
}
if (n_enabled == 0 && total_txqs != 0) {
enabled_queues[0] = -1;
n_enabled = 1;
}
k = 0;
for (i = 0; i < total_txqs; i++) {
if (netdev->tx_q[i].map != i) {
netdev->tx_q[i].map = enabled_queues[k];
k = (k + 1) % n_enabled;
}
}
VLOG_DBG("TX queue mapping for %s\n", netdev->vhost_id);
for (i = 0; i < total_txqs; i++) {
VLOG_DBG("%2d --> %2d", i, netdev->tx_q[i].map);
}
rte_free(enabled_queues);
}
static int
netdev_dpdk_vhost_set_queues(struct netdev_dpdk *netdev, struct virtio_net *dev)
OVS_REQUIRES(netdev->mutex)
{
uint32_t qp_num;
qp_num = dev->virt_qp_nb;
if (qp_num > netdev->up.n_rxq) {
VLOG_ERR("vHost Device '%s' %"PRIu64" can't be added - "
"too many queues %d > %d", dev->ifname, dev->device_fh,
qp_num, netdev->up.n_rxq);
return -1;
}
netdev->real_n_rxq = qp_num;
netdev->real_n_txq = qp_num;
netdev->txq_needs_locking = true;
netdev_dpdk_remap_txqs(netdev);
return 0;
}
/*
* A new virtio-net device is added to a vhost port.
*/
static int
new_device(struct virtio_net *dev)
{
struct netdev_dpdk *netdev;
bool exists = false;
ovs_mutex_lock(&dpdk_mutex);
/* Add device to the vhost port with the same name as that passed down. */
LIST_FOR_EACH(netdev, list_node, &dpdk_list) {
if (strncmp(dev->ifname, netdev->vhost_id, IF_NAME_SZ) == 0) {
ovs_mutex_lock(&netdev->mutex);
if (netdev_dpdk_vhost_set_queues(netdev, dev)) {
ovs_mutex_unlock(&netdev->mutex);
ovs_mutex_unlock(&dpdk_mutex);
return -1;
}
ovsrcu_set(&netdev->virtio_dev, dev);
exists = true;
dev->flags |= VIRTIO_DEV_RUNNING;
/* Disable notifications. */
set_irq_status(dev);
ovs_mutex_unlock(&netdev->mutex);
break;
}
}
ovs_mutex_unlock(&dpdk_mutex);
if (!exists) {
VLOG_INFO("vHost Device '%s' %"PRIu64" can't be added - name not "
"found", dev->ifname, dev->device_fh);
return -1;
}
VLOG_INFO("vHost Device '%s' %"PRIu64" has been added", dev->ifname,
dev->device_fh);
return 0;
}
/*
* Remove a virtio-net device from the specific vhost port. Use dev->remove
* flag to stop any more packets from being sent or received to/from a VM and
* ensure all currently queued packets have been sent/received before removing
* the device.
*/
static void
destroy_device(volatile struct virtio_net *dev)
{
struct netdev_dpdk *vhost_dev;
bool exists = false;
ovs_mutex_lock(&dpdk_mutex);
LIST_FOR_EACH (vhost_dev, list_node, &dpdk_list) {
if (netdev_dpdk_get_virtio(vhost_dev) == dev) {
ovs_mutex_lock(&vhost_dev->mutex);
dev->flags &= ~VIRTIO_DEV_RUNNING;
ovsrcu_set(&vhost_dev->virtio_dev, NULL);
exists = true;
ovs_mutex_unlock(&vhost_dev->mutex);
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", dev->ifname,
dev->device_fh);
} else {
VLOG_INFO("vHost Device '%s' %"PRIu64" not found", dev->ifname,
dev->device_fh);
}
}
static int
vring_state_changed(struct virtio_net *dev, uint16_t queue_id, int enable)
{
struct netdev_dpdk *vhost_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 (vhost_dev, list_node, &dpdk_list) {
if (strncmp(dev->ifname, vhost_dev->vhost_id, IF_NAME_SZ) == 0) {
ovs_mutex_lock(&vhost_dev->mutex);
if (enable) {
vhost_dev->tx_q[qid].map = qid;
} else {
vhost_dev->tx_q[qid].map = -1;
}
netdev_dpdk_remap_txqs(vhost_dev);
exists = true;
ovs_mutex_unlock(&vhost_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, dev->ifname,
dev->device_fh, (enable == 1) ? "enabled" : "disabled");
} else {
VLOG_INFO("vHost Device '%s' %"PRIu64" not found", dev->ifname,
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);
}
/*
* 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);
ovs_thread_create("vhost_thread", start_vhost_loop, NULL);
return 0;
}
static int
dpdk_vhost_cuse_class_init(void)
{
int err = -1;
/* Register CUSE device to handle IOCTLs.
* Unless otherwise specified on the vswitchd command line, cuse_dev_name
* is set to vhost-net.
*/
err = rte_vhost_driver_register(cuse_dev_name);
if (err != 0) {
VLOG_ERR("CUSE device setup failure.");
return -1;
}
dpdk_vhost_class_init();
return 0;
}
static int
dpdk_vhost_user_class_init(void)
{
dpdk_vhost_class_init();
return 0;
}
static void
dpdk_common_init(void)
{
unixctl_command_register("netdev-dpdk/set-admin-state",
"[netdev] up|down", 1, 2,
netdev_dpdk_set_admin_state, NULL);
ovs_thread_create("dpdk_watchdog", dpdk_watchdog, NULL);
}
/* Client Rings */
static int
dpdk_ring_create(const char dev_name[], unsigned int port_no,
unsigned int *eth_port_id)
{
struct dpdk_ring *ivshmem;
char ring_name[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;
list_push_back(&dpdk_ring_list, &ivshmem->list_node);
*eth_port_id = ivshmem->eth_port_id;
return 0;
}
static int
dpdk_ring_open(const char dev_name[], unsigned int *eth_port_id) OVS_REQUIRES(dpdk_mutex)
{
struct dpdk_ring *ivshmem;
unsigned int port_no;
int err = 0;
/* Names always start with "dpdkr" */
err = dpdk_dev_parse_name(dev_name, "dpdkr", &port_no);
if (err) {
return err;
}
/* look through our list to find the device */
LIST_FOR_EACH (ivshmem, list_node, &dpdk_ring_list) {
if (ivshmem->user_port_id == port_no) {
VLOG_INFO("Found dpdk ring device %s:", dev_name);
*eth_port_id = ivshmem->eth_port_id; /* really all that is needed */
return 0;
}
}
/* Need to create the device rings */
return dpdk_ring_create(dev_name, port_no, eth_port_id);
}
static int
netdev_dpdk_ring_send(struct netdev *netdev_, int qid,
struct dp_packet **pkts, int cnt, bool may_steal)
{
struct netdev_dpdk *netdev = netdev_dpdk_cast(netdev_);
unsigned i;
/* When using 'dpdkr' and sending to a DPDK ring, we want to ensure that the
* rss hash field is clear. This is because the same mbuf may be modified by
* the consumer of the ring and return into the datapath without recalculating
* the RSS hash. */
for (i = 0; i < cnt; i++) {
dp_packet_rss_invalidate(pkts[i]);
}
netdev_dpdk_send__(netdev, qid, pkts, cnt, may_steal);
return 0;
}
static int
netdev_dpdk_ring_construct(struct netdev *netdev)
{
unsigned int port_no = 0;
int err = 0;
if (rte_eal_init_ret) {
return rte_eal_init_ret;
}
ovs_mutex_lock(&dpdk_mutex);
err = dpdk_ring_open(netdev->name, &port_no);
if (err) {
goto unlock_dpdk;
}
err = netdev_dpdk_init(netdev, port_no, DPDK_DEV_ETH);
unlock_dpdk:
ovs_mutex_unlock(&dpdk_mutex);
return err;
}
/* 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 *netdev = netdev_dpdk_cast(netdev_);
rte_spinlock_lock(&netdev->qos_lock);
if (netdev->qos_conf) {
if (netdev->qos_conf->ops->qos_destruct) {
netdev->qos_conf->ops->qos_destruct(netdev_, netdev->qos_conf);
}
netdev->qos_conf = NULL;
}
rte_spinlock_unlock(&netdev->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 *netdev = netdev_dpdk_cast(netdev_);
int error = 0;
ovs_mutex_lock(&netdev->mutex);
if(netdev->qos_conf) {
*typep = netdev->qos_conf->ops->qos_name;
error = (netdev->qos_conf->ops->qos_get
? netdev->qos_conf->ops->qos_get(netdev_, details): 0);
}
ovs_mutex_unlock(&netdev->mutex);
return error;
}
static int
netdev_dpdk_set_qos(struct netdev *netdev_,
const char *type, const struct smap *details)
{
struct netdev_dpdk *netdev = 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(&netdev->mutex);
if (netdev->qos_conf) {
if (new_ops == netdev->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(netdev->qos_conf == NULL);
/* Install new QoS configuration. */
error = new_ops->qos_construct(netdev_, details);
ovs_assert((error == 0) == (netdev->qos_conf != NULL));
}
} else {
error = new_ops->qos_construct(netdev_, details);
ovs_assert((error == 0) == (netdev->qos_conf != NULL));
}
ovs_mutex_unlock(&netdev->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 *netdev = netdev_dpdk_cast(netdev_);
return CONTAINER_OF(netdev->qos_conf, struct egress_policer, qos_conf);
}
static int
egress_policer_qos_construct(struct netdev *netdev_,
const struct smap *details)
{
struct netdev_dpdk *netdev = netdev_dpdk_cast(netdev_);
struct egress_policer *policer;
const char *cir_s;
const char *cbs_s;
int err = 0;
rte_spinlock_lock(&netdev->qos_lock);
policer = xmalloc(sizeof *policer);
qos_conf_init(&policer->qos_conf, &egress_policer_ops);
netdev->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(&netdev->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 inline bool
egress_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
egress_policer_run(struct netdev *netdev_, struct rte_mbuf **pkts,
int pkt_cnt)
{
int i = 0;
int cnt = 0;
struct egress_policer *policer = egress_policer_get__(netdev_);
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 (egress_policer_pkt_handle__(&policer->egress_meter, pkt,
current_time)) {
if (cnt != i) {
pkts[cnt] = pkt;
}
cnt++;
} else {
rte_pktmbuf_free(pkt);
}
}
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
};
#define NETDEV_DPDK_CLASS(NAME, INIT, CONSTRUCT, DESTRUCT, MULTIQ, SEND, \
GET_CARRIER, GET_STATS, GET_FEATURES, GET_STATUS, RXQ_RECV) \
{ \
NAME, \
INIT, /* init */ \
NULL, /* netdev_dpdk_run */ \
NULL, /* netdev_dpdk_wait */ \
\
netdev_dpdk_alloc, \
CONSTRUCT, \
DESTRUCT, \
netdev_dpdk_dealloc, \
netdev_dpdk_get_config, \
netdev_dpdk_set_config, \
NULL, /* get_tunnel_config */ \
NULL, /* build header */ \
NULL, /* push header */ \
NULL, /* pop header */ \
netdev_dpdk_get_numa_id, /* get_numa_id */ \
MULTIQ, /* set_multiq */ \
\
SEND, /* send */ \
NULL, /* send_wait */ \
\
netdev_dpdk_set_etheraddr, \
netdev_dpdk_get_etheraddr, \
netdev_dpdk_get_mtu, \
netdev_dpdk_set_mtu, \
netdev_dpdk_get_ifindex, \
GET_CARRIER, \
netdev_dpdk_get_carrier_resets, \
netdev_dpdk_set_miimon, \
GET_STATS, \
GET_FEATURES, \
NULL, /* set_advertisements */ \
\
NULL, /* set_policing */ \
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, /* get_in4 */ \
NULL, /* set_in4 */ \
NULL, /* get_in6 */ \
NULL, /* add_router */ \
NULL, /* get_next_hop */ \
GET_STATUS, \
NULL, /* arp_lookup */ \
\
netdev_dpdk_update_flags, \
\
netdev_dpdk_rxq_alloc, \
netdev_dpdk_rxq_construct, \
netdev_dpdk_rxq_destruct, \
netdev_dpdk_rxq_dealloc, \
RXQ_RECV, \
NULL, /* rx_wait */ \
NULL, /* rxq_drain */ \
}
static int
process_vhost_flags(char *flag, char *default_val, int size,
char **argv, char **new_val)
{
int changed = 0;
/* Depending on which version of vhost is in use, process the vhost-specific
* flag if it is provided on the vswitchd command line, otherwise resort to
* a default value.
*
* For vhost-user: Process "-vhost_sock_dir" to set the custom location of
* the vhost-user socket(s).
* For vhost-cuse: Process "-cuse_dev_name" to set the custom name of the
* vhost-cuse character device.
*/
if (!strcmp(argv[1], flag) && (strlen(argv[2]) <= size)) {
changed = 1;
*new_val = xstrdup(argv[2]);
VLOG_INFO("User-provided %s in use: %s", flag, *new_val);
} else {
VLOG_INFO("No %s provided - defaulting to %s", flag, default_val);
*new_val = default_val;
}
return changed;
}
int
dpdk_init(int argc, char **argv)
{
int result;
int base = 0;
char *pragram_name = argv[0];
if (argc < 2 || strcmp(argv[1], "--dpdk"))
return 0;
/* Remove the --dpdk argument from arg list.*/
argc--;
argv++;
/* Reject --user option */
int i;
for (i = 0; i < argc; i++) {
if (!strcmp(argv[i], "--user")) {
VLOG_ERR("Can not mix --dpdk and --user options, aborting.");
}
}
#ifdef VHOST_CUSE
if (process_vhost_flags("-cuse_dev_name", xstrdup("vhost-net"),
PATH_MAX, argv, &cuse_dev_name)) {
#else
if (process_vhost_flags("-vhost_sock_dir", xstrdup(ovs_rundir()),
NAME_MAX, argv, &vhost_sock_dir)) {
struct stat s;
int err;
err = stat(vhost_sock_dir, &s);
if (err) {
VLOG_ERR("vHostUser socket DIR '%s' does not exist.",
vhost_sock_dir);
return err;
}
#endif
/* Remove the vhost flag configuration parameters from the argument
* list, so that the correct elements are passed to the DPDK
* initialization function
*/
argc -= 2;
argv += 2; /* Increment by two to bypass the vhost flag arguments */
base = 2;
}
/* Keep the program name argument as this is needed for call to
* rte_eal_init()
*/
argv[0] = pragram_name;
/* Make sure things are initialized ... */
result = rte_eal_init(argc, argv);
if (result < 0) {
ovs_abort(result, "Cannot init EAL");
}
rte_memzone_dump(stdout);
rte_eal_init_ret = 0;
if (argc > result) {
argv[result] = argv[0];
}
/* We are called from the main thread here */
RTE_PER_LCORE(_lcore_id) = NON_PMD_CORE_ID;
return result + 1 + base;
}
static const struct netdev_class dpdk_class =
NETDEV_DPDK_CLASS(
"dpdk",
NULL,
netdev_dpdk_construct,
netdev_dpdk_destruct,
netdev_dpdk_set_multiq,
netdev_dpdk_eth_send,
netdev_dpdk_get_carrier,
netdev_dpdk_get_stats,
netdev_dpdk_get_features,
netdev_dpdk_get_status,
netdev_dpdk_rxq_recv);
static const struct netdev_class dpdk_ring_class =
NETDEV_DPDK_CLASS(
"dpdkr",
NULL,
netdev_dpdk_ring_construct,
netdev_dpdk_destruct,
netdev_dpdk_set_multiq,
netdev_dpdk_ring_send,
netdev_dpdk_get_carrier,
netdev_dpdk_get_stats,
netdev_dpdk_get_features,
netdev_dpdk_get_status,
netdev_dpdk_rxq_recv);
static const struct netdev_class OVS_UNUSED dpdk_vhost_cuse_class =
NETDEV_DPDK_CLASS(
"dpdkvhostcuse",
dpdk_vhost_cuse_class_init,
netdev_dpdk_vhost_cuse_construct,
netdev_dpdk_vhost_destruct,
netdev_dpdk_vhost_cuse_set_multiq,
netdev_dpdk_vhost_send,
netdev_dpdk_vhost_get_carrier,
netdev_dpdk_vhost_get_stats,
NULL,
NULL,
netdev_dpdk_vhost_rxq_recv);
static const struct netdev_class OVS_UNUSED dpdk_vhost_user_class =
NETDEV_DPDK_CLASS(
"dpdkvhostuser",
dpdk_vhost_user_class_init,
netdev_dpdk_vhost_user_construct,
netdev_dpdk_vhost_destruct,
netdev_dpdk_vhost_set_multiq,
netdev_dpdk_vhost_send,
netdev_dpdk_vhost_get_carrier,
netdev_dpdk_vhost_get_stats,
NULL,
NULL,
netdev_dpdk_vhost_rxq_recv);
void
netdev_dpdk_register(void)
{
static struct ovsthread_once once = OVSTHREAD_ONCE_INITIALIZER;
if (rte_eal_init_ret) {
return;
}
if (ovsthread_once_start(&once)) {
dpdk_common_init();
netdev_register_provider(&dpdk_class);
netdev_register_provider(&dpdk_ring_class);
#ifdef VHOST_CUSE
netdev_register_provider(&dpdk_vhost_cuse_class);
#else
netdev_register_provider(&dpdk_vhost_user_class);
#endif
ovsthread_once_done(&once);
}
}
int
pmd_thread_setaffinity_cpu(unsigned cpu)
{
cpu_set_t cpuset;
int err;
CPU_ZERO(&cpuset);
CPU_SET(cpu, &cpuset);
err = pthread_setaffinity_np(pthread_self(), sizeof(cpu_set_t), &cpuset);
if (err) {
VLOG_ERR("Thread affinity error %d",err);
return err;
}
/* NON_PMD_CORE_ID is reserved for use by non pmd threads. */
ovs_assert(cpu != NON_PMD_CORE_ID);
RTE_PER_LCORE(_lcore_id) = cpu;
return 0;
}
static bool
dpdk_thread_is_pmd(void)
{
return rte_lcore_id() != NON_PMD_CORE_ID;
}
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