DPDK  20.11.3
examples/ip_pipeline/kni.c
/* SPDX-License-Identifier: BSD-3-Clause
* Copyright(c) 2010-2018 Intel Corporation
*/
#include <stdlib.h>
#include <string.h>
#include <rte_ethdev.h>
#include <rte_bus_pci.h>
#include <rte_string_fns.h>
#include "kni.h"
#include "mempool.h"
#include "link.h"
static struct kni_list kni_list;
#ifndef KNI_MAX
#define KNI_MAX 16
#endif
int
kni_init(void)
{
TAILQ_INIT(&kni_list);
#ifdef RTE_LIB_KNI
rte_kni_init(KNI_MAX);
#endif
return 0;
}
struct kni *
kni_find(const char *name)
{
struct kni *kni;
if (name == NULL)
return NULL;
TAILQ_FOREACH(kni, &kni_list, node)
if (strcmp(kni->name, name) == 0)
return kni;
return NULL;
}
#ifndef RTE_LIB_KNI
struct kni *
kni_create(const char *name __rte_unused,
struct kni_params *params __rte_unused)
{
return NULL;
}
void
kni_handle_request(void)
{
return;
}
#else
static int
kni_config_network_interface(uint16_t port_id, uint8_t if_up)
{
int ret = 0;
return -EINVAL;
ret = (if_up) ?
return ret;
}
static int
kni_change_mtu(uint16_t port_id, unsigned int new_mtu)
{
int ret;
return -EINVAL;
if (new_mtu > RTE_ETHER_MAX_LEN)
return -EINVAL;
/* Set new MTU */
ret = rte_eth_dev_set_mtu(port_id, new_mtu);
if (ret < 0)
return ret;
return 0;
}
struct kni *
kni_create(const char *name, struct kni_params *params)
{
struct rte_eth_dev_info dev_info;
struct rte_kni_conf kni_conf;
struct rte_kni_ops kni_ops;
struct kni *kni;
struct mempool *mempool;
struct link *link;
struct rte_kni *k;
const struct rte_pci_device *pci_dev;
const struct rte_bus *bus = NULL;
int ret;
/* Check input params */
if ((name == NULL) ||
kni_find(name) ||
(params == NULL))
return NULL;
mempool = mempool_find(params->mempool_name);
link = link_find(params->link_name);
if ((mempool == NULL) ||
(link == NULL))
return NULL;
/* Resource create */
ret = rte_eth_dev_info_get(link->port_id, &dev_info);
if (ret != 0)
return NULL;
memset(&kni_conf, 0, sizeof(kni_conf));
strlcpy(kni_conf.name, name, RTE_KNI_NAMESIZE);
kni_conf.force_bind = params->force_bind;
kni_conf.core_id = params->thread_id;
kni_conf.group_id = link->port_id;
kni_conf.mbuf_size = mempool->buffer_size;
if (dev_info.device)
bus = rte_bus_find_by_device(dev_info.device);
if (bus && !strcmp(bus->name, "pci")) {
pci_dev = RTE_DEV_TO_PCI(dev_info.device);
kni_conf.addr = pci_dev->addr;
kni_conf.id = pci_dev->id;
}
memset(&kni_ops, 0, sizeof(kni_ops));
kni_ops.port_id = link->port_id;
kni_ops.config_network_if = kni_config_network_interface;
kni_ops.change_mtu = kni_change_mtu;
k = rte_kni_alloc(mempool->m, &kni_conf, &kni_ops);
if (k == NULL)
return NULL;
/* Node allocation */
kni = calloc(1, sizeof(struct kni));
if (kni == NULL)
return NULL;
/* Node fill in */
strlcpy(kni->name, name, sizeof(kni->name));
kni->k = k;
/* Node add to list */
TAILQ_INSERT_TAIL(&kni_list, kni, node);
return kni;
}
void
kni_handle_request(void)
{
struct kni *kni;
TAILQ_FOREACH(kni, &kni_list, node)
}
#endif