/* 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]; #define OBJNAMSIZ 32 char obj_name[OBJNAMSIZ]; char mz_name[RTE_MEMZONE_NAMESIZE]; const struct rte_memzone *mz; if (!pktmbuf_pool || !conf || !conf->name[0]) return NULL; /* Check FD and open once */ if (kni_fd < 0) { kni_fd = open("/dev/" KNI_DEVICE, O_RDWR); if (kni_fd < 0) { RTE_LOG(ERR, KNI, "Can not open /dev/%s\n", KNI_DEVICE); return NULL; } } rte_snprintf(intf_name, RTE_KNI_NAMESIZE, conf->name); rte_snprintf(mz_name, RTE_MEMZONE_NAMESIZE, "KNI_INFO_%s", intf_name); mz = kni_memzone_reserve(mz_name, sizeof(struct rte_kni), SOCKET_ID_ANY, 0); KNI_MZ_CHECK(mz == NULL); ctx = mz->addr; if (ctx->in_use) { RTE_LOG(ERR, KNI, "KNI %s is in use\n", ctx->name); goto fail; } 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; rte_snprintf(ctx->name, RTE_KNI_NAMESIZE, intf_name); rte_snprintf(dev_info.name, RTE_KNI_NAMESIZE, 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 */ rte_snprintf(obj_name, OBJNAMSIZ, "kni_tx_%s", intf_name); mz = kni_memzone_reserve(obj_name, KNI_FIFO_SIZE, SOCKET_ID_ANY, 0); KNI_MZ_CHECK(mz == NULL); ctx->tx_q = mz->addr; kni_fifo_init(ctx->tx_q, KNI_FIFO_COUNT_MAX); dev_info.tx_phys = mz->phys_addr; /* RX RING */ rte_snprintf(obj_name, OBJNAMSIZ, "kni_rx_%s", intf_name); mz = kni_memzone_reserve(obj_name, KNI_FIFO_SIZE, SOCKET_ID_ANY, 0); KNI_MZ_CHECK(mz == NULL); ctx->rx_q = mz->addr; kni_fifo_init(ctx->rx_q, KNI_FIFO_COUNT_MAX); dev_info.rx_phys = mz->phys_addr; /* ALLOC RING */ rte_snprintf(obj_name, OBJNAMSIZ, "kni_alloc_%s", intf_name); mz = kni_memzone_reserve(obj_name, KNI_FIFO_SIZE, SOCKET_ID_ANY, 0); KNI_MZ_CHECK(mz == NULL); ctx->alloc_q = mz->addr; kni_fifo_init(ctx->alloc_q, KNI_FIFO_COUNT_MAX); dev_info.alloc_phys = mz->phys_addr; /* FREE RING */ rte_snprintf(obj_name, OBJNAMSIZ, "kni_free_%s", intf_name); mz = kni_memzone_reserve(obj_name, KNI_FIFO_SIZE, SOCKET_ID_ANY, 0); KNI_MZ_CHECK(mz == NULL); ctx->free_q = mz->addr; kni_fifo_init(ctx->free_q, KNI_FIFO_COUNT_MAX); dev_info.free_phys = mz->phys_addr; /* Request RING */ rte_snprintf(obj_name, OBJNAMSIZ, "kni_req_%s", intf_name); mz = kni_memzone_reserve(obj_name, KNI_FIFO_SIZE, SOCKET_ID_ANY, 0); KNI_MZ_CHECK(mz == NULL); ctx->req_q = mz->addr; kni_fifo_init(ctx->req_q, KNI_FIFO_COUNT_MAX); dev_info.req_phys = mz->phys_addr; /* Response RING */ rte_snprintf(obj_name, OBJNAMSIZ, "kni_resp_%s", intf_name); mz = kni_memzone_reserve(obj_name, KNI_FIFO_SIZE, SOCKET_ID_ANY, 0); KNI_MZ_CHECK(mz == NULL); 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 */ rte_snprintf(obj_name, OBJNAMSIZ, "kni_sync_%s", intf_name); mz = kni_memzone_reserve(obj_name, KNI_FIFO_SIZE, SOCKET_ID_ANY, 0); KNI_MZ_CHECK(mz == NULL); ctx->sync_addr = mz->addr; dev_info.sync_va = mz->addr; dev_info.sync_phys = mz->phys_addr; /* MBUF mempool */ rte_snprintf(mz_name, sizeof(mz_name), "MP_%s", pktmbuf_pool->name); mz = rte_memzone_lookup(mz_name); KNI_MZ_CHECK(mz == NULL); dev_info.mbuf_va = mz->addr; dev_info.mbuf_phys = mz->phys_addr; ctx->pktmbuf_pool = pktmbuf_pool; ctx->group_id = conf->group_id; ctx->mbuf_size = conf->mbuf_size; ret = ioctl(kni_fd, RTE_KNI_IOCTL_CREATE, &dev_info); KNI_MZ_CHECK(ret < 0); ctx->in_use = 1; return ctx; fail: return NULL; }