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rte_eth_vhost.c
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rte_eth_vhost.c
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/* SPDX-License-Identifier: BSD-3-Clause
* Copyright(c) 2016 IGEL Co., Ltd.
* Copyright(c) 2016-2018 Intel Corporation
*/
#include <unistd.h>
#include <pthread.h>
#include <stdbool.h>
#include <rte_mbuf.h>
#include <rte_ethdev_driver.h>
#include <rte_ethdev_vdev.h>
#include <rte_malloc.h>
#include <rte_memcpy.h>
#include <rte_bus_vdev.h>
#include <rte_kvargs.h>
#include <rte_vhost.h>
#include <rte_spinlock.h>
#include "rte_eth_vhost.h"
static int vhost_logtype;
#define VHOST_LOG(level, ...) \
rte_log(RTE_LOG_ ## level, vhost_logtype, __VA_ARGS__)
enum {VIRTIO_RXQ, VIRTIO_TXQ, VIRTIO_QNUM};
#define ETH_VHOST_IFACE_ARG "iface"
#define ETH_VHOST_QUEUES_ARG "queues"
#define ETH_VHOST_CLIENT_ARG "client"
#define ETH_VHOST_DEQUEUE_ZERO_COPY "dequeue-zero-copy"
#define ETH_VHOST_IOMMU_SUPPORT "iommu-support"
#define ETH_VHOST_POSTCOPY_SUPPORT "postcopy-support"
#define ETH_VHOST_VIRTIO_NET_F_HOST_TSO "tso"
#define VHOST_MAX_PKT_BURST 32
static const char *valid_arguments[] = {
ETH_VHOST_IFACE_ARG,
ETH_VHOST_QUEUES_ARG,
ETH_VHOST_CLIENT_ARG,
ETH_VHOST_DEQUEUE_ZERO_COPY,
ETH_VHOST_IOMMU_SUPPORT,
ETH_VHOST_POSTCOPY_SUPPORT,
ETH_VHOST_VIRTIO_NET_F_HOST_TSO,
NULL
};
static struct rte_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_PKT,
VHOST_BYTE,
VHOST_MISSED_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;
uint16_t port;
uint16_t virtqueue_id;
struct vhost_stats stats;
};
struct pmd_internal {
rte_atomic32_t dev_attached;
char *dev_name;
char *iface_name;
uint64_t flags;
uint64_t disable_flags;
uint16_t max_queues;
int vid;
rte_atomic32_t started;
uint8_t vlan_strip;
};
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 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.xstats[VHOST_PKT])},
{"total_bytes",
offsetof(struct vhost_queue, stats.xstats[VHOST_BYTE])},
{"missed_pkts",
offsetof(struct vhost_queue, stats.xstats[VHOST_MISSED_PKT])},
{"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.xstats[VHOST_PKT])},
{"total_bytes",
offsetof(struct vhost_queue, stats.xstats[VHOST_BYTE])},
{"missed_pkts",
offsetof(struct vhost_queue, stats.xstats[VHOST_MISSED_PKT])},
{"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 int
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));
}
return 0;
}
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 (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);
}
xstats[count].id = count;
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);
}
xstats[count].id = count;
count++;
}
return count;
}
static inline void
vhost_count_xcast_packets(struct vhost_queue *vq,
struct rte_mbuf *mbuf)
{
struct rte_ether_addr *ea = NULL;
struct vhost_stats *pstats = &vq->stats;
ea = rte_pktmbuf_mtod(mbuf, struct rte_ether_addr *);
if (rte_is_multicast_ether_addr(ea)) {
if (rte_is_broadcast_ether_addr(ea))
pstats->xstats[VHOST_BROADCAST_PKT]++;
else
pstats->xstats[VHOST_MULTICAST_PKT]++;
} else {
pstats->xstats[VHOST_UNICAST_PKT]++;
}
}
static void
vhost_update_packet_xstats(struct vhost_queue *vq, struct rte_mbuf **bufs,
uint16_t count, uint64_t nb_bytes,
uint64_t nb_missed)
{
uint32_t pkt_len = 0;
uint64_t i = 0;
uint64_t index;
struct vhost_stats *pstats = &vq->stats;
pstats->xstats[VHOST_BYTE] += nb_bytes;
pstats->xstats[VHOST_MISSED_PKT] += nb_missed;
pstats->xstats[VHOST_UNICAST_PKT] += nb_missed;
for (i = 0; i < count ; i++) {
pstats->xstats[VHOST_PKT]++;
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_xcast_packets(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;
uint16_t nb_receive = nb_bufs;
uint64_t nb_bytes = 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 */
while (nb_receive) {
uint16_t nb_pkts;
uint16_t num = (uint16_t)RTE_MIN(nb_receive,
VHOST_MAX_PKT_BURST);
nb_pkts = rte_vhost_dequeue_burst(r->vid, r->virtqueue_id,
r->mb_pool, &bufs[nb_rx],
num);
nb_rx += nb_pkts;
nb_receive -= nb_pkts;
if (nb_pkts < num)
break;
}
r->stats.pkts += nb_rx;
for (i = 0; likely(i < nb_rx); i++) {
bufs[i]->port = r->port;
bufs[i]->vlan_tci = 0;
if (r->internal->vlan_strip)
rte_vlan_strip(bufs[i]);
nb_bytes += bufs[i]->pkt_len;
}
r->stats.bytes += nb_bytes;
vhost_update_packet_xstats(r, bufs, nb_rx, nb_bytes, 0);
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;
uint16_t nb_send = 0;
uint64_t nb_bytes = 0;
uint64_t nb_missed = 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;
for (i = 0; i < nb_bufs; i++) {
struct rte_mbuf *m = bufs[i];
/* Do VLAN tag insertion */
if (m->ol_flags & PKT_TX_VLAN_PKT) {
int error = rte_vlan_insert(&m);
if (unlikely(error)) {
rte_pktmbuf_free(m);
continue;
}
}
bufs[nb_send] = m;
++nb_send;
}
/* Enqueue packets to guest RX queue */
while (nb_send) {
uint16_t nb_pkts;
uint16_t num = (uint16_t)RTE_MIN(nb_send,
VHOST_MAX_PKT_BURST);
nb_pkts = rte_vhost_enqueue_burst(r->vid, r->virtqueue_id,
&bufs[nb_tx], num);
nb_tx += nb_pkts;
nb_send -= nb_pkts;
if (nb_pkts < num)
break;
}
for (i = 0; likely(i < nb_tx); i++)
nb_bytes += bufs[i]->pkt_len;
nb_missed = nb_bufs - nb_tx;
r->stats.pkts += nb_tx;
r->stats.bytes += nb_bytes;
r->stats.missed_pkts += nb_bufs - nb_tx;
vhost_update_packet_xstats(r, bufs, nb_tx, nb_bytes, nb_missed);
/* According to RFC2863, ifHCOutUcastPkts, ifHCOutMulticastPkts and
* ifHCOutBroadcastPkts counters are increased when packets are not
* transmitted successfully.
*/
for (i = nb_tx; i < nb_bufs; i++)
vhost_count_xcast_packets(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 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
eth_rxq_intr_enable(struct rte_eth_dev *dev, uint16_t qid)
{
struct rte_vhost_vring vring;
struct vhost_queue *vq;
int ret = 0;
vq = dev->data->rx_queues[qid];
if (!vq) {
VHOST_LOG(ERR, "rxq%d is not setup yet\n", qid);
return -1;
}
ret = rte_vhost_get_vhost_vring(vq->vid, (qid << 1) + 1, &vring);
if (ret < 0) {
VHOST_LOG(ERR, "Failed to get rxq%d's vring\n", qid);
return ret;
}
VHOST_LOG(INFO, "Enable interrupt for rxq%d\n", qid);
rte_vhost_enable_guest_notification(vq->vid, (qid << 1) + 1, 1);
rte_wmb();
return ret;
}
static int
eth_rxq_intr_disable(struct rte_eth_dev *dev, uint16_t qid)
{
struct rte_vhost_vring vring;
struct vhost_queue *vq;
int ret = 0;
vq = dev->data->rx_queues[qid];
if (!vq) {
VHOST_LOG(ERR, "rxq%d is not setup yet\n", qid);
return -1;
}
ret = rte_vhost_get_vhost_vring(vq->vid, (qid << 1) + 1, &vring);
if (ret < 0) {
VHOST_LOG(ERR, "Failed to get rxq%d's vring", qid);
return ret;
}
VHOST_LOG(INFO, "Disable interrupt for rxq%d\n", qid);
rte_vhost_enable_guest_notification(vq->vid, (qid << 1) + 1, 0);
rte_wmb();
return 0;
}
static void
eth_vhost_uninstall_intr(struct rte_eth_dev *dev)
{
struct rte_intr_handle *intr_handle = dev->intr_handle;
if (intr_handle) {
if (intr_handle->intr_vec)
free(intr_handle->intr_vec);
free(intr_handle);
}
dev->intr_handle = NULL;
}
static int
eth_vhost_install_intr(struct rte_eth_dev *dev)
{
struct rte_vhost_vring vring;
struct vhost_queue *vq;
int count = 0;
int nb_rxq = dev->data->nb_rx_queues;
int i;
int ret;
/* uninstall firstly if we are reconnecting */
if (dev->intr_handle)
eth_vhost_uninstall_intr(dev);
dev->intr_handle = malloc(sizeof(*dev->intr_handle));
if (!dev->intr_handle) {
VHOST_LOG(ERR, "Fail to allocate intr_handle\n");
return -ENOMEM;
}
memset(dev->intr_handle, 0, sizeof(*dev->intr_handle));
dev->intr_handle->efd_counter_size = sizeof(uint64_t);
dev->intr_handle->intr_vec =
malloc(nb_rxq * sizeof(dev->intr_handle->intr_vec[0]));
if (!dev->intr_handle->intr_vec) {
VHOST_LOG(ERR,
"Failed to allocate memory for interrupt vector\n");
free(dev->intr_handle);
return -ENOMEM;
}
VHOST_LOG(INFO, "Prepare intr vec\n");
for (i = 0; i < nb_rxq; i++) {
vq = dev->data->rx_queues[i];
if (!vq) {
VHOST_LOG(INFO, "rxq-%d not setup yet, skip!\n", i);
continue;
}
ret = rte_vhost_get_vhost_vring(vq->vid, (i << 1) + 1, &vring);
if (ret < 0) {
VHOST_LOG(INFO,
"Failed to get rxq-%d's vring, skip!\n", i);
continue;
}
if (vring.kickfd < 0) {
VHOST_LOG(INFO,
"rxq-%d's kickfd is invalid, skip!\n", i);
continue;
}
dev->intr_handle->intr_vec[i] = RTE_INTR_VEC_RXTX_OFFSET + i;
dev->intr_handle->efds[i] = vring.kickfd;
count++;
VHOST_LOG(INFO, "Installed intr vec for rxq-%d\n", i);
}
dev->intr_handle->nb_efd = count;
dev->intr_handle->max_intr = count + 1;
dev->intr_handle->type = RTE_INTR_HANDLE_VDEV;
return 0;
}
static void
update_queuing_status(struct rte_eth_dev *dev, bool wait_queuing)
{
struct pmd_internal *internal = dev->data->dev_private;
struct vhost_queue *vq;
struct rte_vhost_vring_state *state;
unsigned int i;
int allow_queuing = 1;
if (!dev->data->rx_queues || !dev->data->tx_queues)
return;
if (rte_atomic32_read(&internal->started) == 0 ||
rte_atomic32_read(&internal->dev_attached) == 0)
allow_queuing = 0;
state = vring_states[dev->data->port_id];
/* Wait until rx/tx_pkt_burst stops accessing vhost device */
for (i = 0; i < dev->data->nb_rx_queues; i++) {
vq = dev->data->rx_queues[i];
if (vq == NULL)
continue;
if (allow_queuing && state->cur[vq->virtqueue_id])
rte_atomic32_set(&vq->allow_queuing, 1);
else
rte_atomic32_set(&vq->allow_queuing, 0);
while (wait_queuing && rte_atomic32_read(&vq->while_queuing))
rte_pause();
}
for (i = 0; i < dev->data->nb_tx_queues; i++) {
vq = dev->data->tx_queues[i];
if (vq == NULL)
continue;
if (allow_queuing && state->cur[vq->virtqueue_id])
rte_atomic32_set(&vq->allow_queuing, 1);
else
rte_atomic32_set(&vq->allow_queuing, 0);
while (wait_queuing && rte_atomic32_read(&vq->while_queuing))
rte_pause();
}
}
static void
queue_setup(struct rte_eth_dev *eth_dev, struct pmd_internal *internal)
{
struct vhost_queue *vq;
int i;
for (i = 0; i < eth_dev->data->nb_rx_queues; i++) {
vq = eth_dev->data->rx_queues[i];
if (!vq)
continue;
vq->vid = internal->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)
continue;
vq->vid = internal->vid;
vq->internal = internal;
vq->port = eth_dev->data->port_id;
}
}
static int
new_device(int vid)
{
struct rte_eth_dev *eth_dev;
struct internal_list *list;
struct pmd_internal *internal;
struct rte_eth_conf *dev_conf;
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) {
VHOST_LOG(INFO, "Invalid device name: %s\n", ifname);
return -1;
}
eth_dev = list->eth_dev;
internal = eth_dev->data->dev_private;
dev_conf = ð_dev->data->dev_conf;
#ifdef RTE_LIBRTE_VHOST_NUMA
newnode = rte_vhost_get_numa_node(vid);
if (newnode >= 0)
eth_dev->data->numa_node = newnode;
#endif
internal->vid = vid;
if (rte_atomic32_read(&internal->started) == 1) {
queue_setup(eth_dev, internal);
if (dev_conf->intr_conf.rxq) {
if (eth_vhost_install_intr(eth_dev) < 0) {
VHOST_LOG(INFO,
"Failed to install interrupt handler.");
return -1;
}
}
} else {
VHOST_LOG(INFO, "RX/TX queues not exist yet\n");
}
for (i = 0; i < rte_vhost_get_vring_num(vid); i++)
rte_vhost_enable_guest_notification(vid, i, 0);
rte_vhost_get_mtu(vid, ð_dev->data->mtu);
eth_dev->data->dev_link.link_status = ETH_LINK_UP;
rte_atomic32_set(&internal->dev_attached, 1);
update_queuing_status(eth_dev, false);
VHOST_LOG(INFO, "Vhost device %d created\n", vid);
_rte_eth_dev_callback_process(eth_dev, RTE_ETH_EVENT_INTR_LSC, NULL);
return 0;
}
static void
destroy_device(int vid)
{
struct rte_eth_dev *eth_dev;
struct pmd_internal *internal;
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) {
VHOST_LOG(ERR, "Invalid interface name: %s\n", ifname);
return;
}
eth_dev = list->eth_dev;
internal = eth_dev->data->dev_private;
rte_atomic32_set(&internal->dev_attached, 0);
update_queuing_status(eth_dev, true);
eth_dev->data->dev_link.link_status = ETH_LINK_DOWN;
if (eth_dev->data->rx_queues && eth_dev->data->tx_queues) {
for (i = 0; i < eth_dev->data->nb_rx_queues; i++) {
vq = eth_dev->data->rx_queues[i];
if (!vq)
continue;
vq->vid = -1;
}
for (i = 0; i < eth_dev->data->nb_tx_queues; i++) {
vq = eth_dev->data->tx_queues[i];
if (!vq)
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);
VHOST_LOG(INFO, "Vhost device %d destroyed\n", vid);
eth_vhost_uninstall_intr(eth_dev);
_rte_eth_dev_callback_process(eth_dev, RTE_ETH_EVENT_INTR_LSC, NULL);
}
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) {
VHOST_LOG(ERR, "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);
if (state->cur[vring] == enable) {
rte_spinlock_unlock(&state->lock);
return 0;
}
state->cur[vring] = enable;
state->max_vring = RTE_MAX(vring, state->max_vring);
rte_spinlock_unlock(&state->lock);
update_queuing_status(eth_dev, false);
VHOST_LOG(INFO, "vring%u is %s\n",
vring, enable ? "enabled" : "disabled");
_rte_eth_dev_callback_process(eth_dev, RTE_ETH_EVENT_QUEUE_STATE, NULL);
return 0;
}
static struct vhost_device_ops vhost_ops = {
.new_device = new_device,
.destroy_device = destroy_device,
.vring_state_changed = vring_state_changed,
};
static int
vhost_driver_setup(struct rte_eth_dev *eth_dev)
{
struct pmd_internal *internal = eth_dev->data->dev_private;
struct internal_list *list = NULL;
struct rte_vhost_vring_state *vring_state = NULL;
unsigned int numa_node = eth_dev->device->numa_node;
const char *name = eth_dev->device->name;
/* Don't try to setup again if it has already been done. */
list = find_internal_resource(internal->iface_name);
if (list)
return 0;
list = rte_zmalloc_socket(name, sizeof(*list), 0, numa_node);
if (list == NULL)
return -1;
vring_state = rte_zmalloc_socket(name, sizeof(*vring_state),
0, numa_node);
if (vring_state == NULL)
goto free_list;
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;
if (rte_vhost_driver_register(internal->iface_name, internal->flags))
goto list_remove;
if (internal->disable_flags) {
if (rte_vhost_driver_disable_features(internal->iface_name,
internal->disable_flags))
goto drv_unreg;
}
if (rte_vhost_driver_callback_register(internal->iface_name,
&vhost_ops) < 0) {
VHOST_LOG(ERR, "Can't register callbacks\n");
goto drv_unreg;
}
if (rte_vhost_driver_start(internal->iface_name) < 0) {
VHOST_LOG(ERR, "Failed to start driver for %s\n",
internal->iface_name);
goto drv_unreg;
}
return 0;
drv_unreg:
rte_vhost_driver_unregister(internal->iface_name);
list_remove:
vring_states[eth_dev->data->port_id] = NULL;
pthread_mutex_lock(&internal_list_lock);
TAILQ_REMOVE(&internal_list, list, next);
pthread_mutex_unlock(&internal_list_lock);
rte_free(vring_state);
free_list:
rte_free(list);
return -1;
}
int
rte_eth_vhost_get_queue_event(uint16_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) {
VHOST_LOG(ERR, "Invalid port id\n");
return -1;
}
state = vring_states[port_id];
if (!state) {
VHOST_LOG(ERR, "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(uint16_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) {