/* Shall be called before any allocation happens */
void
rte_kni_init(unsigned int max_kni_ifaces)
{
uint32_t i;
struct rte_kni_memzone_slot *it;
const struct rte_memzone *mz;
#define OBJNAMSIZ 32
char obj_name[OBJNAMSIZ];
char mz_name[RTE_MEMZONE_NAMESIZE];
/* Immediately return if KNI is already initialized */
if (kni_memzone_pool.initialized) {
RTE_LOG(WARNING, KNI, "Double call to rte_kni_init()");
return;
}
if (max_kni_ifaces == 0) {
RTE_LOG(ERR, KNI, "Invalid number of max_kni_ifaces %d\n",
max_kni_ifaces);
rte_panic("Unable to initialize KNI\n");
}
/* Check FD and open */
if (kni_fd < 0) {
kni_fd = open("/dev/" KNI_DEVICE, O_RDWR);
if (kni_fd < 0)
rte_panic("Can not open /dev/%s\n", KNI_DEVICE);
}
#ifdef RTE_LIBRW_PIOT
else{
return;
}
#endif
/* Allocate slot objects */
kni_memzone_pool.slots = (struct rte_kni_memzone_slot *)
rte_malloc(NULL,
sizeof(struct rte_kni_memzone_slot) *
max_kni_ifaces,
0);
KNI_MEM_CHECK(kni_memzone_pool.slots == NULL);
/* Initialize general pool variables */
kni_memzone_pool.initialized = 1;
kni_memzone_pool.max_ifaces = max_kni_ifaces;
kni_memzone_pool.free = &kni_memzone_pool.slots[0];
rte_spinlock_init(&kni_memzone_pool.mutex);
/* Pre-allocate all memzones of all the slots; panic on error */
for (i = 0; i < max_kni_ifaces; i++) {
/* Recover current slot */
it = &kni_memzone_pool.slots[i];
it->id = i;
/* Allocate KNI context */
snprintf(mz_name, RTE_MEMZONE_NAMESIZE, "KNI_INFO_%d", i);
mz = kni_memzone_reserve(mz_name, sizeof(struct rte_kni),
SOCKET_ID_ANY, 0);
KNI_MEM_CHECK(mz == NULL);
it->m_ctx = mz;
/* TX RING */
snprintf(obj_name, OBJNAMSIZ, "kni_tx_%d", i);
mz = kni_memzone_reserve(obj_name, KNI_FIFO_SIZE,
SOCKET_ID_ANY, 0);
KNI_MEM_CHECK(mz == NULL);
it->m_tx_q = mz;
/* RX RING */
snprintf(obj_name, OBJNAMSIZ, "kni_rx_%d", i);
mz = kni_memzone_reserve(obj_name, KNI_FIFO_SIZE,
SOCKET_ID_ANY, 0);
KNI_MEM_CHECK(mz == NULL);
it->m_rx_q = mz;
/* ALLOC RING */
snprintf(obj_name, OBJNAMSIZ, "kni_alloc_%d", i);
mz = kni_memzone_reserve(obj_name, KNI_FIFO_SIZE,
SOCKET_ID_ANY, 0);
KNI_MEM_CHECK(mz == NULL);
it->m_alloc_q = mz;
/* FREE RING */
snprintf(obj_name, OBJNAMSIZ, "kni_free_%d", i);
mz = kni_memzone_reserve(obj_name, KNI_FIFO_SIZE,
SOCKET_ID_ANY, 0);
KNI_MEM_CHECK(mz == NULL);
it->m_free_q = mz;
#ifndef RTE_LIBRW_PIOT
/* Request RING */
snprintf(obj_name, OBJNAMSIZ, "kni_req_%d", i);
mz = kni_memzone_reserve(obj_name, KNI_FIFO_SIZE,
SOCKET_ID_ANY, 0);
KNI_MEM_CHECK(mz == NULL);
it->m_req_q = mz;
/* Response RING */
snprintf(obj_name, OBJNAMSIZ, "kni_resp_%d", i);
mz = kni_memzone_reserve(obj_name, KNI_FIFO_SIZE,
SOCKET_ID_ANY, 0);
KNI_MEM_CHECK(mz == NULL);
it->m_resp_q = mz;
/* Req/Resp sync mem area */
snprintf(obj_name, OBJNAMSIZ, "kni_sync_%d", i);
mz = kni_memzone_reserve(obj_name, KNI_FIFO_SIZE,
SOCKET_ID_ANY, 0);
KNI_MEM_CHECK(mz == NULL);
it->m_sync_addr = mz;
#endif
if ((i+1) == max_kni_ifaces) {
it->next = NULL;
kni_memzone_pool.free_tail = it;
} else
it->next = &kni_memzone_pool.slots[i+1];
}
return;
kni_fail:
rte_panic("Unable to allocate memory for max_kni_ifaces:%d. Increase the amount of hugepages memory\n",
max_kni_ifaces);
}
struct rte_kni *
rte_kni_alloc(struct rte_mempool *pktmbuf_pool,
const struct rte_kni_conf *conf,
struct rte_kni_ops *ops)
{
int ret;
struct rte_kni_device_info dev_info;
struct rte_kni *ctx;
char intf_name[RTE_KNI_NAMESIZE];
char mz_name[RTE_MEMZONE_NAMESIZE];
const struct rte_memzone *mz;
const struct rte_mempool *mp;
struct rte_kni_memzone_slot *slot = NULL;
if (!pktmbuf_pool || !conf || !conf->name[0])
return NULL;
/* Check if KNI subsystem has been initialized */
if (kni_memzone_pool.initialized != 1) {
RTE_LOG(ERR, KNI, "KNI subsystem has not been initialized. Invoke rte_kni_init() first\n");
return NULL;
}
/* Get an available slot from the pool */
slot = kni_memzone_pool_alloc();
if (!slot) {
RTE_LOG(ERR, KNI, "Cannot allocate more KNI interfaces; increase the number of max_kni_ifaces(current %d) or release unusued ones.\n",
kni_memzone_pool.max_ifaces);
return NULL;
}
/* Recover ctx */
ctx = slot->m_ctx->addr;
snprintf(intf_name, RTE_KNI_NAMESIZE, "%s", conf->name);
if (ctx->in_use) {
RTE_LOG(ERR, KNI, "KNI %s is in use\n", ctx->name);
return NULL;
}
memset(ctx, 0, sizeof(struct rte_kni));
if (ops)
memcpy(&ctx->ops, ops, sizeof(struct rte_kni_ops));
memset(&dev_info, 0, sizeof(dev_info));
dev_info.bus = conf->addr.bus;
dev_info.devid = conf->addr.devid;
dev_info.function = conf->addr.function;
dev_info.vendor_id = conf->id.vendor_id;
dev_info.device_id = conf->id.device_id;
dev_info.core_id = conf->core_id;
dev_info.force_bind = conf->force_bind;
dev_info.group_id = conf->group_id;
dev_info.mbuf_size = conf->mbuf_size;
#ifdef RTE_LIBRW_PIOT
dev_info.no_data = conf->no_data;
dev_info.no_pci = conf->no_pci;
dev_info.ifindex = conf->ifindex;
dev_info.always_up = conf->always_up;
dev_info.no_tx = conf->no_tx;
dev_info.loopback = conf->loopback;
dev_info.no_user_ring = conf->no_user_ring;
dev_info.mtu = conf->mtu;
dev_info.vlanid = conf->vlanid;
memcpy(dev_info.mac, conf->mac, 6);
strncpy(dev_info.netns_name, conf->netns_name, sizeof(dev_info.netns_name));
dev_info.netns_fd = conf->netns_fd;
dev_info.pid = getpid();
#ifdef RTE_LIBRW_NOHUGE
dev_info.nohuge = conf->nohuge;
dev_info.nl_pid = conf->nl_pid;
#endif
#endif
snprintf(ctx->name, RTE_KNI_NAMESIZE, "%s", intf_name);
snprintf(dev_info.name, RTE_KNI_NAMESIZE, "%s", intf_name);
RTE_LOG(INFO, KNI, "pci: %02x:%02x:%02x \t %02x:%02x\n",
dev_info.bus, dev_info.devid, dev_info.function,
dev_info.vendor_id, dev_info.device_id);
/* TX RING */
mz = slot->m_tx_q;
ctx->tx_q = mz->addr;
kni_fifo_init(ctx->tx_q, KNI_FIFO_COUNT_MAX);
dev_info.tx_phys = mz->phys_addr;
/* RX RING */
mz = slot->m_rx_q;
ctx->rx_q = mz->addr;
kni_fifo_init(ctx->rx_q, KNI_FIFO_COUNT_MAX);
dev_info.rx_phys = mz->phys_addr;
/* ALLOC RING */
mz = slot->m_alloc_q;
ctx->alloc_q = mz->addr;
kni_fifo_init(ctx->alloc_q, KNI_FIFO_COUNT_MAX);
dev_info.alloc_phys = mz->phys_addr;
/* FREE RING */
mz = slot->m_free_q;
ctx->free_q = mz->addr;
kni_fifo_init(ctx->free_q, KNI_FIFO_COUNT_MAX);
dev_info.free_phys = mz->phys_addr;
#ifndef RTE_LIBRW_PIOT
/* Request RING */
mz = slot->m_req_q;
ctx->req_q = mz->addr;
kni_fifo_init(ctx->req_q, KNI_FIFO_COUNT_MAX);
dev_info.req_phys = mz->phys_addr;
/* Response RING */
mz = slot->m_resp_q;
ctx->resp_q = mz->addr;
kni_fifo_init(ctx->resp_q, KNI_FIFO_COUNT_MAX);
dev_info.resp_phys = mz->phys_addr;
/* Req/Resp sync mem area */
mz = slot->m_sync_addr;
ctx->sync_addr = mz->addr;
dev_info.sync_va = mz->addr;
dev_info.sync_phys = mz->phys_addr;
#endif
/* MBUF mempool */
snprintf(mz_name, sizeof(mz_name), RTE_MEMPOOL_MZ_FORMAT,
pktmbuf_pool->name);
mz = rte_memzone_lookup(mz_name);
KNI_MEM_CHECK(mz == NULL);
mp = (struct rte_mempool *)mz->addr;
/* KNI currently requires to have only one memory chunk */
if (mp->nb_mem_chunks != 1)
goto kni_fail;
dev_info.mbuf_va = STAILQ_FIRST(&mp->mem_list)->addr;
dev_info.mbuf_phys = STAILQ_FIRST(&mp->mem_list)->phys_addr;
ctx->pktmbuf_pool = pktmbuf_pool;
ctx->group_id = conf->group_id;
ctx->slot_id = slot->id;
ctx->mbuf_size = conf->mbuf_size;
ret = ioctl(kni_fd, RTE_KNI_IOCTL_CREATE, &dev_info);
KNI_MEM_CHECK(ret < 0);
ctx->in_use = 1;
/* Allocate mbufs and then put them into alloc_q */
kni_allocate_mbufs(ctx);
return ctx;
kni_fail:
if (slot)
kni_memzone_pool_release(&kni_memzone_pool.slots[slot->id]);
return NULL;
}
struct rte_kni *
rte_kni_alloc(struct rte_mempool *pktmbuf_pool,
const struct rte_kni_conf *conf,
struct rte_kni_ops *ops)
{
int ret;
struct rte_kni_device_info dev_info;
struct rte_kni *ctx;
char intf_name[RTE_KNI_NAMESIZE];
const struct rte_memzone *mz;
struct rte_kni_memzone_slot *slot = NULL;
if (!pktmbuf_pool || !conf || !conf->name[0])
return NULL;
/* Check if KNI subsystem has been initialized */
if (kni_memzone_pool.initialized != 1) {
RTE_LOG(ERR, KNI, "KNI subsystem has not been initialized. Invoke rte_kni_init() first\n");
return NULL;
}
/* Get an available slot from the pool */
slot = kni_memzone_pool_alloc();
if (!slot) {
RTE_LOG(ERR, KNI, "Cannot allocate more KNI interfaces; increase the number of max_kni_ifaces(current %d) or release unusued ones.\n",
kni_memzone_pool.max_ifaces);
return NULL;
}
/* Recover ctx */
ctx = slot->m_ctx->addr;
snprintf(intf_name, RTE_KNI_NAMESIZE, "%s", conf->name);
if (ctx->in_use) {
RTE_LOG(ERR, KNI, "KNI %s is in use\n", ctx->name);
return NULL;
}
memset(ctx, 0, sizeof(struct rte_kni));
if (ops)
memcpy(&ctx->ops, ops, sizeof(struct rte_kni_ops));
memset(&dev_info, 0, sizeof(dev_info));
dev_info.bus = conf->addr.bus;
dev_info.devid = conf->addr.devid;
dev_info.function = conf->addr.function;
dev_info.vendor_id = conf->id.vendor_id;
dev_info.device_id = conf->id.device_id;
dev_info.core_id = conf->core_id;
dev_info.force_bind = conf->force_bind;
dev_info.group_id = conf->group_id;
dev_info.mbuf_size = conf->mbuf_size;
snprintf(ctx->name, RTE_KNI_NAMESIZE, "%s", intf_name);
snprintf(dev_info.name, RTE_KNI_NAMESIZE, "%s", intf_name);
RTE_LOG(INFO, KNI, "pci: %02x:%02x:%02x \t %02x:%02x\n",
dev_info.bus, dev_info.devid, dev_info.function,
dev_info.vendor_id, dev_info.device_id);
/* TX RING */
mz = slot->m_tx_q;
ctx->tx_q = mz->addr;
kni_fifo_init(ctx->tx_q, KNI_FIFO_COUNT_MAX);
dev_info.tx_phys = mz->phys_addr;
/* RX RING */
mz = slot->m_rx_q;
ctx->rx_q = mz->addr;
kni_fifo_init(ctx->rx_q, KNI_FIFO_COUNT_MAX);
dev_info.rx_phys = mz->phys_addr;
/* ALLOC RING */
mz = slot->m_alloc_q;
ctx->alloc_q = mz->addr;
kni_fifo_init(ctx->alloc_q, KNI_FIFO_COUNT_MAX);
dev_info.alloc_phys = mz->phys_addr;
/* FREE RING */
mz = slot->m_free_q;
ctx->free_q = mz->addr;
kni_fifo_init(ctx->free_q, KNI_FIFO_COUNT_MAX);
dev_info.free_phys = mz->phys_addr;
/* Request RING */
mz = slot->m_req_q;
ctx->req_q = mz->addr;
kni_fifo_init(ctx->req_q, KNI_FIFO_COUNT_MAX);
dev_info.req_phys = mz->phys_addr;
/* Response RING */
mz = slot->m_resp_q;
ctx->resp_q = mz->addr;
kni_fifo_init(ctx->resp_q, KNI_FIFO_COUNT_MAX);
dev_info.resp_phys = mz->phys_addr;
/* Req/Resp sync mem area */
mz = slot->m_sync_addr;
ctx->sync_addr = mz->addr;
dev_info.sync_va = mz->addr;
dev_info.sync_phys = mz->phys_addr;
ctx->pktmbuf_pool = pktmbuf_pool;
ctx->group_id = conf->group_id;
ctx->slot_id = slot->id;
ctx->mbuf_size = conf->mbuf_size;
ret = ioctl(kni_fd, RTE_KNI_IOCTL_CREATE, &dev_info);
KNI_MEM_CHECK(ret < 0);
ctx->in_use = 1;
/* Allocate mbufs and then put them into alloc_q */
kni_allocate_mbufs(ctx);
return ctx;
kni_fail:
if (slot)
kni_memzone_pool_release(&kni_memzone_pool.slots[slot->id]);
return NULL;
}
