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/* SPDX-License-Identifier: BSD-3-Clause
* Copyright(c) 2017 Intel Corporation
*/
#include <fcntl.h>
#include <pthread.h>
#include <unistd.h>
#include <rte_ethdev_driver.h>
#include <rte_ethdev_vdev.h>
#include <rte_kni.h>
#include <rte_kvargs.h>
#include <rte_malloc.h>
#include <rte_bus_vdev.h>
/* Only single queue supported */
#define KNI_MAX_QUEUE_PER_PORT 1
#define MAX_PACKET_SZ 2048
#define MAX_KNI_PORTS 8
#define ETH_KNI_NO_REQUEST_THREAD_ARG "no_request_thread"
static const char * const valid_arguments[] = {
ETH_KNI_NO_REQUEST_THREAD_ARG,
NULL
};
struct eth_kni_args {
int no_request_thread;
};
struct pmd_queue_stats {
uint64_t pkts;
uint64_t bytes;
uint64_t err_pkts;
};
struct pmd_queue {
struct pmd_internals *internals;
struct rte_mempool *mb_pool;
struct pmd_queue_stats rx;
struct pmd_queue_stats tx;
};
struct pmd_internals {
struct rte_kni *kni;
int is_kni_started;
pthread_t thread;
int stop_thread;
int no_request_thread;
struct ether_addr eth_addr;
struct pmd_queue rx_queues[KNI_MAX_QUEUE_PER_PORT];
struct pmd_queue tx_queues[KNI_MAX_QUEUE_PER_PORT];
};
static const struct rte_eth_link pmd_link = {
.link_speed = ETH_SPEED_NUM_10G,
.link_duplex = ETH_LINK_FULL_DUPLEX,
.link_status = ETH_LINK_DOWN,
.link_autoneg = ETH_LINK_FIXED,
};
static int is_kni_initialized;
static int eth_kni_logtype;
#define PMD_LOG(level, fmt, args...) \
rte_log(RTE_LOG_ ## level, eth_kni_logtype, \
"%s(): " fmt "\n", __func__, ##args)
static uint16_t
eth_kni_rx(void *q, struct rte_mbuf **bufs, uint16_t nb_bufs)
{
struct pmd_queue *kni_q = q;
struct rte_kni *kni = kni_q->internals->kni;
uint16_t nb_pkts;
nb_pkts = rte_kni_rx_burst(kni, bufs, nb_bufs);
kni_q->rx.pkts += nb_pkts;
kni_q->rx.err_pkts += nb_bufs - nb_pkts;
return nb_pkts;
}
static uint16_t
eth_kni_tx(void *q, struct rte_mbuf **bufs, uint16_t nb_bufs)
{
struct pmd_queue *kni_q = q;
struct rte_kni *kni = kni_q->internals->kni;
uint16_t nb_pkts;
nb_pkts = rte_kni_tx_burst(kni, bufs, nb_bufs);
kni_q->tx.pkts += nb_pkts;
kni_q->tx.err_pkts += nb_bufs - nb_pkts;
return nb_pkts;
}
static void *
kni_handle_request(void *param)
{
struct pmd_internals *internals = param;
#define MS 1000
while (!internals->stop_thread) {
rte_kni_handle_request(internals->kni);
usleep(500 * MS);
}
return param;
}
static int
eth_kni_start(struct rte_eth_dev *dev)
{
struct pmd_internals *internals = dev->data->dev_private;
uint16_t port_id = dev->data->port_id;
struct rte_mempool *mb_pool;
struct rte_kni_conf conf;
const char *name = dev->device->name + 4; /* remove net_ */
snprintf(conf.name, RTE_KNI_NAMESIZE, "%s", name);
conf.force_bind = 0;
conf.group_id = port_id;
conf.mbuf_size = MAX_PACKET_SZ;
mb_pool = internals->rx_queues[0].mb_pool;
internals->kni = rte_kni_alloc(mb_pool, &conf, NULL);
if (internals->kni == NULL) {
PMD_LOG(ERR,
"Fail to create kni interface for port: %d",
port_id);
return -1;
}
return 0;
}
static int
eth_kni_dev_start(struct rte_eth_dev *dev)
{
struct pmd_internals *internals = dev->data->dev_private;
int ret;
if (internals->is_kni_started == 0) {
ret = eth_kni_start(dev);
if (ret)
return -1;
internals->is_kni_started = 1;
}
if (internals->no_request_thread == 0) {
ret = rte_ctrl_thread_create(&internals->thread,
"kni_handle_req", NULL,
kni_handle_request, internals);
if (ret) {
PMD_LOG(ERR,
"Fail to create kni request thread");
return -1;
}
}
dev->data->dev_link.link_status = 1;
return 0;
}
static void
eth_kni_dev_stop(struct rte_eth_dev *dev)
{
struct pmd_internals *internals = dev->data->dev_private;
int ret;
if (internals->no_request_thread == 0) {
internals->stop_thread = 1;
ret = pthread_cancel(internals->thread);
if (ret)
PMD_LOG(ERR, "Can't cancel the thread");
ret = pthread_join(internals->thread, NULL);
if (ret)
PMD_LOG(ERR, "Can't join the thread");
internals->stop_thread = 0;
}
dev->data->dev_link.link_status = 0;
}
static int
eth_kni_dev_configure(struct rte_eth_dev *dev __rte_unused)
{
return 0;
}
static void
eth_kni_dev_info(struct rte_eth_dev *dev __rte_unused,
struct rte_eth_dev_info *dev_info)
{
dev_info->max_mac_addrs = 1;
dev_info->max_rx_pktlen = UINT32_MAX;
dev_info->max_rx_queues = KNI_MAX_QUEUE_PER_PORT;
dev_info->max_tx_queues = KNI_MAX_QUEUE_PER_PORT;
dev_info->min_rx_bufsize = 0;
}
static int
eth_kni_rx_queue_setup(struct rte_eth_dev *dev,
uint16_t rx_queue_id,
uint16_t nb_rx_desc __rte_unused,
unsigned int socket_id __rte_unused,
const struct rte_eth_rxconf *rx_conf __rte_unused,
struct rte_mempool *mb_pool)
{
struct pmd_internals *internals = dev->data->dev_private;
struct pmd_queue *q;
q = &internals->rx_queues[rx_queue_id];
q->internals = internals;
q->mb_pool = mb_pool;
dev->data->rx_queues[rx_queue_id] = q;
return 0;
}
static int
eth_kni_tx_queue_setup(struct rte_eth_dev *dev,
uint16_t tx_queue_id,
uint16_t nb_tx_desc __rte_unused,
unsigned int socket_id __rte_unused,
const struct rte_eth_txconf *tx_conf __rte_unused)
{
struct pmd_internals *internals = dev->data->dev_private;
struct pmd_queue *q;
q = &internals->tx_queues[tx_queue_id];
q->internals = internals;
dev->data->tx_queues[tx_queue_id] = q;
return 0;
}
static void
eth_kni_queue_release(void *q __rte_unused)
{
}
static int
eth_kni_link_update(struct rte_eth_dev *dev __rte_unused,
int wait_to_complete __rte_unused)
{
return 0;
}
static int
eth_kni_stats_get(struct rte_eth_dev *dev, struct rte_eth_stats *stats)
{
unsigned long rx_packets_total = 0, rx_bytes_total = 0;
unsigned long tx_packets_total = 0, tx_bytes_total = 0;
struct rte_eth_dev_data *data = dev->data;
unsigned long tx_packets_err_total = 0;
unsigned int i, num_stats;
struct pmd_queue *q;
num_stats = RTE_MIN((unsigned int)RTE_ETHDEV_QUEUE_STAT_CNTRS,
data->nb_rx_queues);
for (i = 0; i < num_stats; i++) {
q = data->rx_queues[i];
stats->q_ipackets[i] = q->rx.pkts;
stats->q_ibytes[i] = q->rx.bytes;
rx_packets_total += stats->q_ipackets[i];
rx_bytes_total += stats->q_ibytes[i];
}
num_stats = RTE_MIN((unsigned int)RTE_ETHDEV_QUEUE_STAT_CNTRS,
data->nb_tx_queues);
for (i = 0; i < num_stats; i++) {
q = data->tx_queues[i];
stats->q_opackets[i] = q->tx.pkts;
stats->q_obytes[i] = q->tx.bytes;
stats->q_errors[i] = q->tx.err_pkts;
tx_packets_total += stats->q_opackets[i];
tx_bytes_total += stats->q_obytes[i];
tx_packets_err_total += stats->q_errors[i];
}
stats->ipackets = rx_packets_total;
stats->ibytes = rx_bytes_total;
stats->opackets = tx_packets_total;
stats->obytes = tx_bytes_total;
stats->oerrors = tx_packets_err_total;
return 0;
}
static void
eth_kni_stats_reset(struct rte_eth_dev *dev)
{
struct rte_eth_dev_data *data = dev->data;
struct pmd_queue *q;
unsigned int i;
for (i = 0; i < data->nb_rx_queues; i++) {
q = data->rx_queues[i];
q->rx.pkts = 0;
q->rx.bytes = 0;
}
for (i = 0; i < data->nb_tx_queues; i++) {
q = data->tx_queues[i];
q->tx.pkts = 0;
q->tx.bytes = 0;
q->tx.err_pkts = 0;
}
}
static const struct eth_dev_ops eth_kni_ops = {
.dev_start = eth_kni_dev_start,
.dev_stop = eth_kni_dev_stop,
.dev_configure = eth_kni_dev_configure,
.dev_infos_get = eth_kni_dev_info,
.rx_queue_setup = eth_kni_rx_queue_setup,
.tx_queue_setup = eth_kni_tx_queue_setup,
.rx_queue_release = eth_kni_queue_release,
.tx_queue_release = eth_kni_queue_release,
.link_update = eth_kni_link_update,
.stats_get = eth_kni_stats_get,
.stats_reset = eth_kni_stats_reset,
};
static struct rte_eth_dev *
eth_kni_create(struct rte_vdev_device *vdev,
struct eth_kni_args *args,
unsigned int numa_node)
{
struct pmd_internals *internals;
struct rte_eth_dev_data *data;
struct rte_eth_dev *eth_dev;
PMD_LOG(INFO, "Creating kni ethdev on numa socket %u",
numa_node);
/* reserve an ethdev entry */
eth_dev = rte_eth_vdev_allocate(vdev, sizeof(*internals));
if (!eth_dev)
return NULL;
internals = eth_dev->data->dev_private;
data = eth_dev->data;
data->nb_rx_queues = 1;
data->nb_tx_queues = 1;
data->dev_link = pmd_link;
data->mac_addrs = &internals->eth_addr;
eth_random_addr(internals->eth_addr.addr_bytes);
eth_dev->dev_ops = ð_kni_ops;
internals->no_request_thread = args->no_request_thread;
return eth_dev;
}
static int
kni_init(void)
{
if (is_kni_initialized == 0)
rte_kni_init(MAX_KNI_PORTS);
is_kni_initialized++;
return 0;
}
static int
eth_kni_kvargs_process(struct eth_kni_args *args, const char *params)
{
struct rte_kvargs *kvlist;
kvlist = rte_kvargs_parse(params, valid_arguments);
if (kvlist == NULL)
return -1;
memset(args, 0, sizeof(struct eth_kni_args));
if (rte_kvargs_count(kvlist, ETH_KNI_NO_REQUEST_THREAD_ARG) == 1)
args->no_request_thread = 1;
rte_kvargs_free(kvlist);
return 0;
}
static int
eth_kni_probe(struct rte_vdev_device *vdev)
{
struct rte_eth_dev *eth_dev;
struct eth_kni_args args;
const char *name;
const char *params;
int ret;
name = rte_vdev_device_name(vdev);
params = rte_vdev_device_args(vdev);
PMD_LOG(INFO, "Initializing eth_kni for %s", name);
if (rte_eal_process_type() == RTE_PROC_SECONDARY) {
eth_dev = rte_eth_dev_attach_secondary(name);
if (!eth_dev) {
PMD_LOG(ERR, "Failed to probe %s", name);
return -1;
}
/* TODO: request info from primary to set up Rx and Tx */
eth_dev->dev_ops = ð_kni_ops;
eth_dev->device = &vdev->device;
rte_eth_dev_probing_finish(eth_dev);
return 0;
}
ret = eth_kni_kvargs_process(&args, params);
if (ret < 0)
return ret;
ret = kni_init();
if (ret < 0)
return ret;
eth_dev = eth_kni_create(vdev, &args, rte_socket_id());
if (eth_dev == NULL)
goto kni_uninit;
eth_dev->rx_pkt_burst = eth_kni_rx;
eth_dev->tx_pkt_burst = eth_kni_tx;
rte_eth_dev_probing_finish(eth_dev);
return 0;
kni_uninit:
is_kni_initialized--;
if (is_kni_initialized == 0)
rte_kni_close();
return -1;
}
static int
eth_kni_remove(struct rte_vdev_device *vdev)
{
struct rte_eth_dev *eth_dev;
struct pmd_internals *internals;
const char *name;
name = rte_vdev_device_name(vdev);
PMD_LOG(INFO, "Un-Initializing eth_kni for %s", name);
/* find the ethdev entry */
eth_dev = rte_eth_dev_allocated(name);
if (eth_dev == NULL)
return -1;
/* mac_addrs must not be freed alone because part of dev_private */
eth_dev->data->mac_addrs = NULL;
if (rte_eal_process_type() != RTE_PROC_PRIMARY)
return rte_eth_dev_release_port(eth_dev);
eth_kni_dev_stop(eth_dev);
internals = eth_dev->data->dev_private;
rte_kni_release(internals->kni);
rte_eth_dev_release_port(eth_dev);
is_kni_initialized--;
if (is_kni_initialized == 0)
rte_kni_close();
return 0;
}
static struct rte_vdev_driver eth_kni_drv = {
.probe = eth_kni_probe,
.remove = eth_kni_remove,
};
RTE_PMD_REGISTER_VDEV(net_kni, eth_kni_drv);
RTE_PMD_REGISTER_PARAM_STRING(net_kni, ETH_KNI_NO_REQUEST_THREAD_ARG "=<int>");
RTE_INIT(eth_kni_init_log)
{
eth_kni_logtype = rte_log_register("pmd.net.kni");
if (eth_kni_logtype >= 0)
rte_log_set_level(eth_kni_logtype, RTE_LOG_NOTICE);
}
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