numam-dpdk/drivers/net/vhost/rte_eth_vhost.c
Zhiyong Yang 4d6cf2ac93 net/vhost: add extended statistics
This feature adds vhost pmd extended statistics from per port perspective
in order to meet the requirements of the applications such as OVS etc.
RX/TX xstats count the bytes without CRC. This is different from physical
NIC stats with CRC.

The statistics counters are based on RFC 2819 and RFC 2863 as follows:

rx/tx_good_packets
rx/tx_total_bytes
rx/tx_missed_pkts
rx/tx_broadcast_packets
rx/tx_multicast_packets
rx/tx_unicast_packets
rx/tx_undersize_errors
rx/tx_size_64_packets
rx/tx_size_65_to_127_packets;
rx/tx_size_128_to_255_packets;
rx/tx_size_256_to_511_packets;
rx/tx_size_512_to_1023_packets;
rx/tx_size_1024_to_1522_packets;
rx/tx_1523_to_max_packets;
rx/tx_errors
rx_fragmented_errors
rx_jabber_errors
rx_unknown_protos_packets;

No API is changed or added.
rte_eth_xstats_get_names() to retrieve what kinds of vhost xstats are
supported,
rte_eth_xstats_get() to retrieve vhost extended statistics,
rte_eth_xstats_reset() to reset vhost extended statistics.

The usage of vhost pmd xstats is the same as virtio pmd xstats.
for example, when test-pmd application is running in interactive mode
vhost pmd xstats will support the two following commands:

show port xstats all | port_id will show vhost xstats
clear port xstats all | port_id will reset vhost xstats

net/virtio pmd xstats(the function virtio_update_packet_stats) is used
as reference when implementing the feature.

Tested-by: Ciara Loftus <ciara.loftus@intel.com>
Signed-off-by: Zhiyong Yang <zhiyong.yang@intel.com>
Acked-by: Yuanhan Liu <yuanhan.liu@linux.intel.com>
2016-09-29 15:08:08 +02:00

1237 lines
30 KiB
C

/*-
* BSD LICENSE
*
* Copyright (c) 2016 IGEL Co., Ltd.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
* * Neither the name of IGEL Co.,Ltd. nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include <unistd.h>
#include <pthread.h>
#include <stdbool.h>
#ifdef RTE_LIBRTE_VHOST_NUMA
#include <numaif.h>
#endif
#include <rte_mbuf.h>
#include <rte_ethdev.h>
#include <rte_malloc.h>
#include <rte_memcpy.h>
#include <rte_vdev.h>
#include <rte_kvargs.h>
#include <rte_virtio_net.h>
#include <rte_spinlock.h>
#include "rte_eth_vhost.h"
#define ETH_VHOST_IFACE_ARG "iface"
#define ETH_VHOST_QUEUES_ARG "queues"
#define ETH_VHOST_CLIENT_ARG "client"
static const char *drivername = "VHOST PMD";
static const char *valid_arguments[] = {
ETH_VHOST_IFACE_ARG,
ETH_VHOST_QUEUES_ARG,
ETH_VHOST_CLIENT_ARG,
NULL
};
static struct ether_addr base_eth_addr = {
.addr_bytes = {
0x56 /* V */,
0x48 /* H */,
0x4F /* O */,
0x53 /* S */,
0x54 /* T */,
0x00
}
};
enum vhost_xstats_pkts {
VHOST_UNDERSIZE_PKT = 0,
VHOST_64_PKT,
VHOST_65_TO_127_PKT,
VHOST_128_TO_255_PKT,
VHOST_256_TO_511_PKT,
VHOST_512_TO_1023_PKT,
VHOST_1024_TO_1522_PKT,
VHOST_1523_TO_MAX_PKT,
VHOST_BROADCAST_PKT,
VHOST_MULTICAST_PKT,
VHOST_UNICAST_PKT,
VHOST_ERRORS_PKT,
VHOST_ERRORS_FRAGMENTED,
VHOST_ERRORS_JABBER,
VHOST_UNKNOWN_PROTOCOL,
VHOST_XSTATS_MAX,
};
struct vhost_stats {
uint64_t pkts;
uint64_t bytes;
uint64_t missed_pkts;
uint64_t xstats[VHOST_XSTATS_MAX];
};
struct vhost_queue {
int vid;
rte_atomic32_t allow_queuing;
rte_atomic32_t while_queuing;
struct pmd_internal *internal;
struct rte_mempool *mb_pool;
uint8_t port;
uint16_t virtqueue_id;
struct vhost_stats stats;
};
struct pmd_internal {
char *dev_name;
char *iface_name;
uint16_t max_queues;
uint64_t flags;
volatile uint16_t once;
};
struct internal_list {
TAILQ_ENTRY(internal_list) next;
struct rte_eth_dev *eth_dev;
};
TAILQ_HEAD(internal_list_head, internal_list);
static struct internal_list_head internal_list =
TAILQ_HEAD_INITIALIZER(internal_list);
static pthread_mutex_t internal_list_lock = PTHREAD_MUTEX_INITIALIZER;
static rte_atomic16_t nb_started_ports;
static pthread_t session_th;
static struct rte_eth_link pmd_link = {
.link_speed = 10000,
.link_duplex = ETH_LINK_FULL_DUPLEX,
.link_status = ETH_LINK_DOWN
};
struct rte_vhost_vring_state {
rte_spinlock_t lock;
bool cur[RTE_MAX_QUEUES_PER_PORT * 2];
bool seen[RTE_MAX_QUEUES_PER_PORT * 2];
unsigned int index;
unsigned int max_vring;
};
static struct rte_vhost_vring_state *vring_states[RTE_MAX_ETHPORTS];
#define VHOST_XSTATS_NAME_SIZE 64
struct vhost_xstats_name_off {
char name[VHOST_XSTATS_NAME_SIZE];
uint64_t offset;
};
/* [rx]_is prepended to the name string here */
static const struct vhost_xstats_name_off vhost_rxport_stat_strings[] = {
{"good_packets",
offsetof(struct vhost_queue, stats.pkts)},
{"total_bytes",
offsetof(struct vhost_queue, stats.bytes)},
{"missed_pkts",
offsetof(struct vhost_queue, stats.missed_pkts)},
{"broadcast_packets",
offsetof(struct vhost_queue, stats.xstats[VHOST_BROADCAST_PKT])},
{"multicast_packets",
offsetof(struct vhost_queue, stats.xstats[VHOST_MULTICAST_PKT])},
{"unicast_packets",
offsetof(struct vhost_queue, stats.xstats[VHOST_UNICAST_PKT])},
{"undersize_packets",
offsetof(struct vhost_queue, stats.xstats[VHOST_UNDERSIZE_PKT])},
{"size_64_packets",
offsetof(struct vhost_queue, stats.xstats[VHOST_64_PKT])},
{"size_65_to_127_packets",
offsetof(struct vhost_queue, stats.xstats[VHOST_65_TO_127_PKT])},
{"size_128_to_255_packets",
offsetof(struct vhost_queue, stats.xstats[VHOST_128_TO_255_PKT])},
{"size_256_to_511_packets",
offsetof(struct vhost_queue, stats.xstats[VHOST_256_TO_511_PKT])},
{"size_512_to_1023_packets",
offsetof(struct vhost_queue, stats.xstats[VHOST_512_TO_1023_PKT])},
{"size_1024_to_1522_packets",
offsetof(struct vhost_queue, stats.xstats[VHOST_1024_TO_1522_PKT])},
{"size_1523_to_max_packets",
offsetof(struct vhost_queue, stats.xstats[VHOST_1523_TO_MAX_PKT])},
{"errors_with_bad_CRC",
offsetof(struct vhost_queue, stats.xstats[VHOST_ERRORS_PKT])},
{"fragmented_errors",
offsetof(struct vhost_queue, stats.xstats[VHOST_ERRORS_FRAGMENTED])},
{"jabber_errors",
offsetof(struct vhost_queue, stats.xstats[VHOST_ERRORS_JABBER])},
{"unknown_protos_packets",
offsetof(struct vhost_queue, stats.xstats[VHOST_UNKNOWN_PROTOCOL])},
};
/* [tx]_ is prepended to the name string here */
static const struct vhost_xstats_name_off vhost_txport_stat_strings[] = {
{"good_packets",
offsetof(struct vhost_queue, stats.pkts)},
{"total_bytes",
offsetof(struct vhost_queue, stats.bytes)},
{"missed_pkts",
offsetof(struct vhost_queue, stats.missed_pkts)},
{"broadcast_packets",
offsetof(struct vhost_queue, stats.xstats[VHOST_BROADCAST_PKT])},
{"multicast_packets",
offsetof(struct vhost_queue, stats.xstats[VHOST_MULTICAST_PKT])},
{"unicast_packets",
offsetof(struct vhost_queue, stats.xstats[VHOST_UNICAST_PKT])},
{"undersize_packets",
offsetof(struct vhost_queue, stats.xstats[VHOST_UNDERSIZE_PKT])},
{"size_64_packets",
offsetof(struct vhost_queue, stats.xstats[VHOST_64_PKT])},
{"size_65_to_127_packets",
offsetof(struct vhost_queue, stats.xstats[VHOST_65_TO_127_PKT])},
{"size_128_to_255_packets",
offsetof(struct vhost_queue, stats.xstats[VHOST_128_TO_255_PKT])},
{"size_256_to_511_packets",
offsetof(struct vhost_queue, stats.xstats[VHOST_256_TO_511_PKT])},
{"size_512_to_1023_packets",
offsetof(struct vhost_queue, stats.xstats[VHOST_512_TO_1023_PKT])},
{"size_1024_to_1522_packets",
offsetof(struct vhost_queue, stats.xstats[VHOST_1024_TO_1522_PKT])},
{"size_1523_to_max_packets",
offsetof(struct vhost_queue, stats.xstats[VHOST_1523_TO_MAX_PKT])},
{"errors_with_bad_CRC",
offsetof(struct vhost_queue, stats.xstats[VHOST_ERRORS_PKT])},
};
#define VHOST_NB_XSTATS_RXPORT (sizeof(vhost_rxport_stat_strings) / \
sizeof(vhost_rxport_stat_strings[0]))
#define VHOST_NB_XSTATS_TXPORT (sizeof(vhost_txport_stat_strings) / \
sizeof(vhost_txport_stat_strings[0]))
static void
vhost_dev_xstats_reset(struct rte_eth_dev *dev)
{
struct vhost_queue *vq = NULL;
unsigned int i = 0;
for (i = 0; i < dev->data->nb_rx_queues; i++) {
vq = dev->data->rx_queues[i];
if (!vq)
continue;
memset(&vq->stats, 0, sizeof(vq->stats));
}
for (i = 0; i < dev->data->nb_tx_queues; i++) {
vq = dev->data->tx_queues[i];
if (!vq)
continue;
memset(&vq->stats, 0, sizeof(vq->stats));
}
}
static int
vhost_dev_xstats_get_names(struct rte_eth_dev *dev __rte_unused,
struct rte_eth_xstat_name *xstats_names,
unsigned int limit __rte_unused)
{
unsigned int t = 0;
int count = 0;
int nstats = VHOST_NB_XSTATS_RXPORT + VHOST_NB_XSTATS_TXPORT;
if (!xstats_names)
return nstats;
for (t = 0; t < VHOST_NB_XSTATS_RXPORT; t++) {
snprintf(xstats_names[count].name,
sizeof(xstats_names[count].name),
"rx_%s", vhost_rxport_stat_strings[t].name);
count++;
}
for (t = 0; t < VHOST_NB_XSTATS_TXPORT; t++) {
snprintf(xstats_names[count].name,
sizeof(xstats_names[count].name),
"tx_%s", vhost_txport_stat_strings[t].name);
count++;
}
return count;
}
static int
vhost_dev_xstats_get(struct rte_eth_dev *dev, struct rte_eth_xstat *xstats,
unsigned int n)
{
unsigned int i;
unsigned int t;
unsigned int count = 0;
struct vhost_queue *vq = NULL;
unsigned int nxstats = VHOST_NB_XSTATS_RXPORT + VHOST_NB_XSTATS_TXPORT;
if (n < nxstats)
return nxstats;
for (i = 0; i < dev->data->nb_rx_queues; i++) {
vq = dev->data->rx_queues[i];
if (!vq)
continue;
vq->stats.xstats[VHOST_UNICAST_PKT] = vq->stats.pkts
- (vq->stats.xstats[VHOST_BROADCAST_PKT]
+ vq->stats.xstats[VHOST_MULTICAST_PKT]);
}
for (i = 0; i < dev->data->nb_tx_queues; i++) {
vq = dev->data->tx_queues[i];
if (!vq)
continue;
vq->stats.xstats[VHOST_UNICAST_PKT] = vq->stats.pkts
+ vq->stats.missed_pkts
- (vq->stats.xstats[VHOST_BROADCAST_PKT]
+ vq->stats.xstats[VHOST_MULTICAST_PKT]);
}
for (t = 0; t < VHOST_NB_XSTATS_RXPORT; t++) {
xstats[count].value = 0;
for (i = 0; i < dev->data->nb_rx_queues; i++) {
vq = dev->data->rx_queues[i];
if (!vq)
continue;
xstats[count].value +=
*(uint64_t *)(((char *)vq)
+ vhost_rxport_stat_strings[t].offset);
}
count++;
}
for (t = 0; t < VHOST_NB_XSTATS_TXPORT; t++) {
xstats[count].value = 0;
for (i = 0; i < dev->data->nb_tx_queues; i++) {
vq = dev->data->tx_queues[i];
if (!vq)
continue;
xstats[count].value +=
*(uint64_t *)(((char *)vq)
+ vhost_txport_stat_strings[t].offset);
}
count++;
}
return count;
}
static inline void
vhost_count_multicast_broadcast(struct vhost_queue *vq,
struct rte_mbuf *mbuf)
{
struct ether_addr *ea = NULL;
struct vhost_stats *pstats = &vq->stats;
ea = rte_pktmbuf_mtod(mbuf, struct ether_addr *);
if (is_multicast_ether_addr(ea)) {
if (is_broadcast_ether_addr(ea))
pstats->xstats[VHOST_BROADCAST_PKT]++;
else
pstats->xstats[VHOST_MULTICAST_PKT]++;
}
}
static void
vhost_update_packet_xstats(struct vhost_queue *vq,
struct rte_mbuf **bufs,
uint16_t count)
{
uint32_t pkt_len = 0;
uint64_t i = 0;
uint64_t index;
struct vhost_stats *pstats = &vq->stats;
for (i = 0; i < count ; i++) {
pkt_len = bufs[i]->pkt_len;
if (pkt_len == 64) {
pstats->xstats[VHOST_64_PKT]++;
} else if (pkt_len > 64 && pkt_len < 1024) {
index = (sizeof(pkt_len) * 8)
- __builtin_clz(pkt_len) - 5;
pstats->xstats[index]++;
} else {
if (pkt_len < 64)
pstats->xstats[VHOST_UNDERSIZE_PKT]++;
else if (pkt_len <= 1522)
pstats->xstats[VHOST_1024_TO_1522_PKT]++;
else if (pkt_len > 1522)
pstats->xstats[VHOST_1523_TO_MAX_PKT]++;
}
vhost_count_multicast_broadcast(vq, bufs[i]);
}
}
static uint16_t
eth_vhost_rx(void *q, struct rte_mbuf **bufs, uint16_t nb_bufs)
{
struct vhost_queue *r = q;
uint16_t i, nb_rx = 0;
if (unlikely(rte_atomic32_read(&r->allow_queuing) == 0))
return 0;
rte_atomic32_set(&r->while_queuing, 1);
if (unlikely(rte_atomic32_read(&r->allow_queuing) == 0))
goto out;
/* Dequeue packets from guest TX queue */
nb_rx = rte_vhost_dequeue_burst(r->vid,
r->virtqueue_id, r->mb_pool, bufs, nb_bufs);
r->stats.pkts += nb_rx;
for (i = 0; likely(i < nb_rx); i++) {
bufs[i]->port = r->port;
r->stats.bytes += bufs[i]->pkt_len;
}
vhost_update_packet_xstats(r, bufs, nb_rx);
out:
rte_atomic32_set(&r->while_queuing, 0);
return nb_rx;
}
static uint16_t
eth_vhost_tx(void *q, struct rte_mbuf **bufs, uint16_t nb_bufs)
{
struct vhost_queue *r = q;
uint16_t i, nb_tx = 0;
if (unlikely(rte_atomic32_read(&r->allow_queuing) == 0))
return 0;
rte_atomic32_set(&r->while_queuing, 1);
if (unlikely(rte_atomic32_read(&r->allow_queuing) == 0))
goto out;
/* Enqueue packets to guest RX queue */
nb_tx = rte_vhost_enqueue_burst(r->vid,
r->virtqueue_id, bufs, nb_bufs);
r->stats.pkts += nb_tx;
r->stats.missed_pkts += nb_bufs - nb_tx;
for (i = 0; likely(i < nb_tx); i++)
r->stats.bytes += bufs[i]->pkt_len;
vhost_update_packet_xstats(r, bufs, nb_tx);
/* According to RFC2863 page42 section ifHCOutMulticastPkts and
* ifHCOutBroadcastPkts, the counters "multicast" and "broadcast"
* are increased when packets are not transmitted successfully.
*/
for (i = nb_tx; i < nb_bufs; i++)
vhost_count_multicast_broadcast(r, bufs[i]);
for (i = 0; likely(i < nb_tx); i++)
rte_pktmbuf_free(bufs[i]);
out:
rte_atomic32_set(&r->while_queuing, 0);
return nb_tx;
}
static int
eth_dev_configure(struct rte_eth_dev *dev __rte_unused)
{
return 0;
}
static inline struct internal_list *
find_internal_resource(char *ifname)
{
int found = 0;
struct internal_list *list;
struct pmd_internal *internal;
if (ifname == NULL)
return NULL;
pthread_mutex_lock(&internal_list_lock);
TAILQ_FOREACH(list, &internal_list, next) {
internal = list->eth_dev->data->dev_private;
if (!strcmp(internal->iface_name, ifname)) {
found = 1;
break;
}
}
pthread_mutex_unlock(&internal_list_lock);
if (!found)
return NULL;
return list;
}
static int
new_device(int vid)
{
struct rte_eth_dev *eth_dev;
struct internal_list *list;
struct pmd_internal *internal;
struct vhost_queue *vq;
unsigned i;
char ifname[PATH_MAX];
#ifdef RTE_LIBRTE_VHOST_NUMA
int newnode;
#endif
rte_vhost_get_ifname(vid, ifname, sizeof(ifname));
list = find_internal_resource(ifname);
if (list == NULL) {
RTE_LOG(INFO, PMD, "Invalid device name: %s\n", ifname);
return -1;
}
eth_dev = list->eth_dev;
internal = eth_dev->data->dev_private;
#ifdef RTE_LIBRTE_VHOST_NUMA
newnode = rte_vhost_get_numa_node(vid);
if (newnode >= 0)
eth_dev->data->numa_node = newnode;
#endif
for (i = 0; i < eth_dev->data->nb_rx_queues; i++) {
vq = eth_dev->data->rx_queues[i];
if (vq == NULL)
continue;
vq->vid = vid;
vq->internal = internal;
vq->port = eth_dev->data->port_id;
}
for (i = 0; i < eth_dev->data->nb_tx_queues; i++) {
vq = eth_dev->data->tx_queues[i];
if (vq == NULL)
continue;
vq->vid = vid;
vq->internal = internal;
vq->port = eth_dev->data->port_id;
}
for (i = 0; i < rte_vhost_get_queue_num(vid) * VIRTIO_QNUM; i++)
rte_vhost_enable_guest_notification(vid, i, 0);
eth_dev->data->dev_link.link_status = ETH_LINK_UP;
for (i = 0; i < eth_dev->data->nb_rx_queues; i++) {
vq = eth_dev->data->rx_queues[i];
if (vq == NULL)
continue;
rte_atomic32_set(&vq->allow_queuing, 1);
}
for (i = 0; i < eth_dev->data->nb_tx_queues; i++) {
vq = eth_dev->data->tx_queues[i];
if (vq == NULL)
continue;
rte_atomic32_set(&vq->allow_queuing, 1);
}
RTE_LOG(INFO, PMD, "New connection established\n");
_rte_eth_dev_callback_process(eth_dev, RTE_ETH_EVENT_INTR_LSC);
return 0;
}
static void
destroy_device(int vid)
{
struct rte_eth_dev *eth_dev;
struct vhost_queue *vq;
struct internal_list *list;
char ifname[PATH_MAX];
unsigned i;
struct rte_vhost_vring_state *state;
rte_vhost_get_ifname(vid, ifname, sizeof(ifname));
list = find_internal_resource(ifname);
if (list == NULL) {
RTE_LOG(ERR, PMD, "Invalid interface name: %s\n", ifname);
return;
}
eth_dev = list->eth_dev;
/* Wait until rx/tx_pkt_burst stops accessing vhost device */
for (i = 0; i < eth_dev->data->nb_rx_queues; i++) {
vq = eth_dev->data->rx_queues[i];
if (vq == NULL)
continue;
rte_atomic32_set(&vq->allow_queuing, 0);
while (rte_atomic32_read(&vq->while_queuing))
rte_pause();
}
for (i = 0; i < eth_dev->data->nb_tx_queues; i++) {
vq = eth_dev->data->tx_queues[i];
if (vq == NULL)
continue;
rte_atomic32_set(&vq->allow_queuing, 0);
while (rte_atomic32_read(&vq->while_queuing))
rte_pause();
}
eth_dev->data->dev_link.link_status = ETH_LINK_DOWN;
for (i = 0; i < eth_dev->data->nb_rx_queues; i++) {
vq = eth_dev->data->rx_queues[i];
if (vq == NULL)
continue;
vq->vid = -1;
}
for (i = 0; i < eth_dev->data->nb_tx_queues; i++) {
vq = eth_dev->data->tx_queues[i];
if (vq == NULL)
continue;
vq->vid = -1;
}
state = vring_states[eth_dev->data->port_id];
rte_spinlock_lock(&state->lock);
for (i = 0; i <= state->max_vring; i++) {
state->cur[i] = false;
state->seen[i] = false;
}
state->max_vring = 0;
rte_spinlock_unlock(&state->lock);
RTE_LOG(INFO, PMD, "Connection closed\n");
_rte_eth_dev_callback_process(eth_dev, RTE_ETH_EVENT_INTR_LSC);
}
static int
vring_state_changed(int vid, uint16_t vring, int enable)
{
struct rte_vhost_vring_state *state;
struct rte_eth_dev *eth_dev;
struct internal_list *list;
char ifname[PATH_MAX];
rte_vhost_get_ifname(vid, ifname, sizeof(ifname));
list = find_internal_resource(ifname);
if (list == NULL) {
RTE_LOG(ERR, PMD, "Invalid interface name: %s\n", ifname);
return -1;
}
eth_dev = list->eth_dev;
/* won't be NULL */
state = vring_states[eth_dev->data->port_id];
rte_spinlock_lock(&state->lock);
state->cur[vring] = enable;
state->max_vring = RTE_MAX(vring, state->max_vring);
rte_spinlock_unlock(&state->lock);
RTE_LOG(INFO, PMD, "vring%u is %s\n",
vring, enable ? "enabled" : "disabled");
_rte_eth_dev_callback_process(eth_dev, RTE_ETH_EVENT_QUEUE_STATE);
return 0;
}
int
rte_eth_vhost_get_queue_event(uint8_t port_id,
struct rte_eth_vhost_queue_event *event)
{
struct rte_vhost_vring_state *state;
unsigned int i;
int idx;
if (port_id >= RTE_MAX_ETHPORTS) {
RTE_LOG(ERR, PMD, "Invalid port id\n");
return -1;
}
state = vring_states[port_id];
if (!state) {
RTE_LOG(ERR, PMD, "Unused port\n");
return -1;
}
rte_spinlock_lock(&state->lock);
for (i = 0; i <= state->max_vring; i++) {
idx = state->index++ % (state->max_vring + 1);
if (state->cur[idx] != state->seen[idx]) {
state->seen[idx] = state->cur[idx];
event->queue_id = idx / 2;
event->rx = idx & 1;
event->enable = state->cur[idx];
rte_spinlock_unlock(&state->lock);
return 0;
}
}
rte_spinlock_unlock(&state->lock);
return -1;
}
int
rte_eth_vhost_get_vid_from_port_id(uint8_t port_id)
{
struct internal_list *list;
struct rte_eth_dev *eth_dev;
struct vhost_queue *vq;
int vid = -1;
if (!rte_eth_dev_is_valid_port(port_id))
return -1;
pthread_mutex_lock(&internal_list_lock);
TAILQ_FOREACH(list, &internal_list, next) {
eth_dev = list->eth_dev;
if (eth_dev->data->port_id == port_id) {
vq = eth_dev->data->rx_queues[0];
if (vq) {
vid = vq->vid;
}
break;
}
}
pthread_mutex_unlock(&internal_list_lock);
return vid;
}
static void *
vhost_driver_session(void *param __rte_unused)
{
static struct virtio_net_device_ops vhost_ops;
/* set vhost arguments */
vhost_ops.new_device = new_device;
vhost_ops.destroy_device = destroy_device;
vhost_ops.vring_state_changed = vring_state_changed;
if (rte_vhost_driver_callback_register(&vhost_ops) < 0)
RTE_LOG(ERR, PMD, "Can't register callbacks\n");
/* start event handling */
rte_vhost_driver_session_start();
return NULL;
}
static int
vhost_driver_session_start(void)
{
int ret;
ret = pthread_create(&session_th,
NULL, vhost_driver_session, NULL);
if (ret)
RTE_LOG(ERR, PMD, "Can't create a thread\n");
return ret;
}
static void
vhost_driver_session_stop(void)
{
int ret;
ret = pthread_cancel(session_th);
if (ret)
RTE_LOG(ERR, PMD, "Can't cancel the thread\n");
ret = pthread_join(session_th, NULL);
if (ret)
RTE_LOG(ERR, PMD, "Can't join the thread\n");
}
static int
eth_dev_start(struct rte_eth_dev *dev)
{
struct pmd_internal *internal = dev->data->dev_private;
int ret = 0;
if (rte_atomic16_cmpset(&internal->once, 0, 1)) {
ret = rte_vhost_driver_register(internal->iface_name,
internal->flags);
if (ret)
return ret;
}
/* We need only one message handling thread */
if (rte_atomic16_add_return(&nb_started_ports, 1) == 1)
ret = vhost_driver_session_start();
return ret;
}
static void
eth_dev_stop(struct rte_eth_dev *dev)
{
struct pmd_internal *internal = dev->data->dev_private;
if (rte_atomic16_cmpset(&internal->once, 1, 0))
rte_vhost_driver_unregister(internal->iface_name);
if (rte_atomic16_sub_return(&nb_started_ports, 1) == 0)
vhost_driver_session_stop();
}
static int
eth_rx_queue_setup(struct rte_eth_dev *dev, uint16_t rx_queue_id,
uint16_t nb_rx_desc __rte_unused,
unsigned int socket_id,
const struct rte_eth_rxconf *rx_conf __rte_unused,
struct rte_mempool *mb_pool)
{
struct vhost_queue *vq;
vq = rte_zmalloc_socket(NULL, sizeof(struct vhost_queue),
RTE_CACHE_LINE_SIZE, socket_id);
if (vq == NULL) {
RTE_LOG(ERR, PMD, "Failed to allocate memory for rx queue\n");
return -ENOMEM;
}
vq->mb_pool = mb_pool;
vq->virtqueue_id = rx_queue_id * VIRTIO_QNUM + VIRTIO_TXQ;
dev->data->rx_queues[rx_queue_id] = vq;
return 0;
}
static int
eth_tx_queue_setup(struct rte_eth_dev *dev, uint16_t tx_queue_id,
uint16_t nb_tx_desc __rte_unused,
unsigned int socket_id,
const struct rte_eth_txconf *tx_conf __rte_unused)
{
struct vhost_queue *vq;
vq = rte_zmalloc_socket(NULL, sizeof(struct vhost_queue),
RTE_CACHE_LINE_SIZE, socket_id);
if (vq == NULL) {
RTE_LOG(ERR, PMD, "Failed to allocate memory for tx queue\n");
return -ENOMEM;
}
vq->virtqueue_id = tx_queue_id * VIRTIO_QNUM + VIRTIO_RXQ;
dev->data->tx_queues[tx_queue_id] = vq;
return 0;
}
static void
eth_dev_info(struct rte_eth_dev *dev,
struct rte_eth_dev_info *dev_info)
{
struct pmd_internal *internal;
internal = dev->data->dev_private;
if (internal == NULL) {
RTE_LOG(ERR, PMD, "Invalid device specified\n");
return;
}
dev_info->driver_name = drivername;
dev_info->max_mac_addrs = 1;
dev_info->max_rx_pktlen = (uint32_t)-1;
dev_info->max_rx_queues = internal->max_queues;
dev_info->max_tx_queues = internal->max_queues;
dev_info->min_rx_bufsize = 0;
}
static void
eth_stats_get(struct rte_eth_dev *dev, struct rte_eth_stats *stats)
{
unsigned i;
unsigned long rx_total = 0, tx_total = 0, tx_missed_total = 0;
unsigned long rx_total_bytes = 0, tx_total_bytes = 0;
struct vhost_queue *vq;
for (i = 0; i < RTE_ETHDEV_QUEUE_STAT_CNTRS &&
i < dev->data->nb_rx_queues; i++) {
if (dev->data->rx_queues[i] == NULL)
continue;
vq = dev->data->rx_queues[i];
stats->q_ipackets[i] = vq->stats.pkts;
rx_total += stats->q_ipackets[i];
stats->q_ibytes[i] = vq->stats.bytes;
rx_total_bytes += stats->q_ibytes[i];
}
for (i = 0; i < RTE_ETHDEV_QUEUE_STAT_CNTRS &&
i < dev->data->nb_tx_queues; i++) {
if (dev->data->tx_queues[i] == NULL)
continue;
vq = dev->data->tx_queues[i];
stats->q_opackets[i] = vq->stats.pkts;
tx_missed_total += vq->stats.missed_pkts;
tx_total += stats->q_opackets[i];
stats->q_obytes[i] = vq->stats.bytes;
tx_total_bytes += stats->q_obytes[i];
}
stats->ipackets = rx_total;
stats->opackets = tx_total;
stats->oerrors = tx_missed_total;
stats->ibytes = rx_total_bytes;
stats->obytes = tx_total_bytes;
}
static void
eth_stats_reset(struct rte_eth_dev *dev)
{
struct vhost_queue *vq;
unsigned i;
for (i = 0; i < dev->data->nb_rx_queues; i++) {
if (dev->data->rx_queues[i] == NULL)
continue;
vq = dev->data->rx_queues[i];
vq->stats.pkts = 0;
vq->stats.bytes = 0;
}
for (i = 0; i < dev->data->nb_tx_queues; i++) {
if (dev->data->tx_queues[i] == NULL)
continue;
vq = dev->data->tx_queues[i];
vq->stats.pkts = 0;
vq->stats.bytes = 0;
vq->stats.missed_pkts = 0;
}
}
static void
eth_queue_release(void *q)
{
rte_free(q);
}
static int
eth_link_update(struct rte_eth_dev *dev __rte_unused,
int wait_to_complete __rte_unused)
{
return 0;
}
/**
* Disable features in feature_mask. Returns 0 on success.
*/
int
rte_eth_vhost_feature_disable(uint64_t feature_mask)
{
return rte_vhost_feature_disable(feature_mask);
}
/**
* Enable features in feature_mask. Returns 0 on success.
*/
int
rte_eth_vhost_feature_enable(uint64_t feature_mask)
{
return rte_vhost_feature_enable(feature_mask);
}
/* Returns currently supported vhost features */
uint64_t
rte_eth_vhost_feature_get(void)
{
return rte_vhost_feature_get();
}
static const struct eth_dev_ops ops = {
.dev_start = eth_dev_start,
.dev_stop = eth_dev_stop,
.dev_configure = eth_dev_configure,
.dev_infos_get = eth_dev_info,
.rx_queue_setup = eth_rx_queue_setup,
.tx_queue_setup = eth_tx_queue_setup,
.rx_queue_release = eth_queue_release,
.tx_queue_release = eth_queue_release,
.link_update = eth_link_update,
.stats_get = eth_stats_get,
.stats_reset = eth_stats_reset,
.xstats_reset = vhost_dev_xstats_reset,
.xstats_get = vhost_dev_xstats_get,
.xstats_get_names = vhost_dev_xstats_get_names,
};
static int
eth_dev_vhost_create(const char *name, char *iface_name, int16_t queues,
const unsigned numa_node, uint64_t flags)
{
struct rte_eth_dev_data *data = NULL;
struct pmd_internal *internal = NULL;
struct rte_eth_dev *eth_dev = NULL;
struct ether_addr *eth_addr = NULL;
struct rte_vhost_vring_state *vring_state = NULL;
struct internal_list *list = NULL;
RTE_LOG(INFO, PMD, "Creating VHOST-USER backend on numa socket %u\n",
numa_node);
/* now do all data allocation - for eth_dev structure, dummy pci driver
* and internal (private) data
*/
data = rte_zmalloc_socket(name, sizeof(*data), 0, numa_node);
if (data == NULL)
goto error;
internal = rte_zmalloc_socket(name, sizeof(*internal), 0, numa_node);
if (internal == NULL)
goto error;
list = rte_zmalloc_socket(name, sizeof(*list), 0, numa_node);
if (list == NULL)
goto error;
/* reserve an ethdev entry */
eth_dev = rte_eth_dev_allocate(name);
if (eth_dev == NULL)
goto error;
eth_addr = rte_zmalloc_socket(name, sizeof(*eth_addr), 0, numa_node);
if (eth_addr == NULL)
goto error;
*eth_addr = base_eth_addr;
eth_addr->addr_bytes[5] = eth_dev->data->port_id;
vring_state = rte_zmalloc_socket(name,
sizeof(*vring_state), 0, numa_node);
if (vring_state == NULL)
goto error;
TAILQ_INIT(&eth_dev->link_intr_cbs);
/* now put it all together
* - store queue data in internal,
* - store numa_node info in ethdev data
* - point eth_dev_data to internals
* - and point eth_dev structure to new eth_dev_data structure
*/
internal->dev_name = strdup(name);
if (internal->dev_name == NULL)
goto error;
internal->iface_name = strdup(iface_name);
if (internal->iface_name == NULL)
goto error;
internal->flags = flags;
list->eth_dev = eth_dev;
pthread_mutex_lock(&internal_list_lock);
TAILQ_INSERT_TAIL(&internal_list, list, next);
pthread_mutex_unlock(&internal_list_lock);
rte_spinlock_init(&vring_state->lock);
vring_states[eth_dev->data->port_id] = vring_state;
data->dev_private = internal;
data->port_id = eth_dev->data->port_id;
memmove(data->name, eth_dev->data->name, sizeof(data->name));
data->nb_rx_queues = queues;
data->nb_tx_queues = queues;
internal->max_queues = queues;
data->dev_link = pmd_link;
data->mac_addrs = eth_addr;
/* We'll replace the 'data' originally allocated by eth_dev. So the
* vhost PMD resources won't be shared between multi processes.
*/
eth_dev->data = data;
eth_dev->dev_ops = &ops;
eth_dev->driver = NULL;
data->dev_flags =
RTE_ETH_DEV_DETACHABLE | RTE_ETH_DEV_INTR_LSC;
data->kdrv = RTE_KDRV_NONE;
data->drv_name = internal->dev_name;
data->numa_node = numa_node;
/* finally assign rx and tx ops */
eth_dev->rx_pkt_burst = eth_vhost_rx;
eth_dev->tx_pkt_burst = eth_vhost_tx;
return data->port_id;
error:
if (internal)
free(internal->dev_name);
rte_free(vring_state);
rte_free(eth_addr);
if (eth_dev)
rte_eth_dev_release_port(eth_dev);
rte_free(internal);
rte_free(list);
rte_free(data);
return -1;
}
static inline int
open_iface(const char *key __rte_unused, const char *value, void *extra_args)
{
const char **iface_name = extra_args;
if (value == NULL)
return -1;
*iface_name = value;
return 0;
}
static inline int
open_int(const char *key __rte_unused, const char *value, void *extra_args)
{
uint16_t *n = extra_args;
if (value == NULL || extra_args == NULL)
return -EINVAL;
*n = (uint16_t)strtoul(value, NULL, 0);
if (*n == USHRT_MAX && errno == ERANGE)
return -1;
return 0;
}
static int
rte_pmd_vhost_devinit(const char *name, const char *params)
{
struct rte_kvargs *kvlist = NULL;
int ret = 0;
char *iface_name;
uint16_t queues;
uint64_t flags = 0;
int client_mode = 0;
RTE_LOG(INFO, PMD, "Initializing pmd_vhost for %s\n", name);
kvlist = rte_kvargs_parse(params, valid_arguments);
if (kvlist == NULL)
return -1;
if (rte_kvargs_count(kvlist, ETH_VHOST_IFACE_ARG) == 1) {
ret = rte_kvargs_process(kvlist, ETH_VHOST_IFACE_ARG,
&open_iface, &iface_name);
if (ret < 0)
goto out_free;
} else {
ret = -1;
goto out_free;
}
if (rte_kvargs_count(kvlist, ETH_VHOST_QUEUES_ARG) == 1) {
ret = rte_kvargs_process(kvlist, ETH_VHOST_QUEUES_ARG,
&open_int, &queues);
if (ret < 0 || queues > RTE_MAX_QUEUES_PER_PORT)
goto out_free;
} else
queues = 1;
if (rte_kvargs_count(kvlist, ETH_VHOST_CLIENT_ARG) == 1) {
ret = rte_kvargs_process(kvlist, ETH_VHOST_CLIENT_ARG,
&open_int, &client_mode);
if (ret < 0)
goto out_free;
if (client_mode)
flags |= RTE_VHOST_USER_CLIENT;
}
eth_dev_vhost_create(name, iface_name, queues, rte_socket_id(), flags);
out_free:
rte_kvargs_free(kvlist);
return ret;
}
static int
rte_pmd_vhost_devuninit(const char *name)
{
struct rte_eth_dev *eth_dev = NULL;
struct pmd_internal *internal;
struct internal_list *list;
unsigned int i;
RTE_LOG(INFO, PMD, "Un-Initializing pmd_vhost for %s\n", name);
/* find an ethdev entry */
eth_dev = rte_eth_dev_allocated(name);
if (eth_dev == NULL)
return -ENODEV;
internal = eth_dev->data->dev_private;
if (internal == NULL)
return -ENODEV;
list = find_internal_resource(internal->iface_name);
if (list == NULL)
return -ENODEV;
pthread_mutex_lock(&internal_list_lock);
TAILQ_REMOVE(&internal_list, list, next);
pthread_mutex_unlock(&internal_list_lock);
rte_free(list);
eth_dev_stop(eth_dev);
rte_free(vring_states[eth_dev->data->port_id]);
vring_states[eth_dev->data->port_id] = NULL;
free(internal->dev_name);
free(internal->iface_name);
for (i = 0; i < eth_dev->data->nb_rx_queues; i++)
rte_free(eth_dev->data->rx_queues[i]);
for (i = 0; i < eth_dev->data->nb_tx_queues; i++)
rte_free(eth_dev->data->tx_queues[i]);
rte_free(eth_dev->data->mac_addrs);
rte_free(eth_dev->data);
rte_free(internal);
rte_eth_dev_release_port(eth_dev);
return 0;
}
static struct rte_vdev_driver pmd_vhost_drv = {
.init = rte_pmd_vhost_devinit,
.uninit = rte_pmd_vhost_devuninit,
};
DRIVER_REGISTER_VDEV(net_vhost, pmd_vhost_drv);
DRIVER_REGISTER_PARAM_STRING(net_vhost,
"iface=<ifc> "
"queues=<int>");