--- /dev/null
+/*-
+ * BSD LICENSE
+ *
+ * Copyright(c) 2010-2014 Intel Corporation. All rights reserved.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * * Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in
+ * the documentation and/or other materials provided with the
+ * distribution.
+ * * Neither the name of Intel Corporation nor the names of its
+ * contributors may be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#ifndef RTE_EXEC_ENV_LINUXAPP
+#error "KNI is not supported"
+#endif
+
+#include <string.h>
+#include <fcntl.h>
+#include <unistd.h>
+#include <sys/ioctl.h>
+
+#include <rte_spinlock.h>
+#include <rte_string_fns.h>
+#include <rte_ethdev.h>
+#include <rte_malloc.h>
+#include <rte_log.h>
+#include <rte_kni.h>
+#include <rte_memzone.h>
+#include <exec-env/rte_kni_common.h>
+#include "rte_kni_fifo.h"
+
+#define MAX_MBUF_BURST_NUM 32
+
+/* Maximum number of ring entries */
+#define KNI_FIFO_COUNT_MAX 1024
+#define KNI_FIFO_SIZE (KNI_FIFO_COUNT_MAX * sizeof(void *) + \
+ sizeof(struct rte_kni_fifo))
+
+#define KNI_REQUEST_MBUF_NUM_MAX 32
+
+#define KNI_MEM_CHECK(cond) do { if (cond) goto kni_fail; } while (0)
+
+/**
+ * KNI context
+ */
+struct rte_kni {
+ char name[RTE_KNI_NAMESIZE]; /**< KNI interface name */
+ uint16_t group_id; /**< Group ID of KNI devices */
+ uint32_t slot_id; /**< KNI pool slot ID */
+ struct rte_mempool *pktmbuf_pool; /**< pkt mbuf mempool */
+ unsigned mbuf_size; /**< mbuf size */
+
+ struct rte_kni_fifo *tx_q; /**< TX queue */
+ struct rte_kni_fifo *rx_q; /**< RX queue */
+ struct rte_kni_fifo *alloc_q; /**< Allocated mbufs queue */
+ struct rte_kni_fifo *free_q; /**< To be freed mbufs queue */
+
+ /* For request & response */
+ struct rte_kni_fifo *req_q; /**< Request queue */
+ struct rte_kni_fifo *resp_q; /**< Response queue */
+ void * sync_addr; /**< Req/Resp Mem address */
+
+ struct rte_kni_ops ops; /**< operations for request */
+ uint8_t in_use : 1; /**< kni in use */
+};
+
+enum kni_ops_status {
+ KNI_REQ_NO_REGISTER = 0,
+ KNI_REQ_REGISTERED,
+};
+
+/**
+ * KNI memzone pool slot
+ */
+struct rte_kni_memzone_slot {
+ uint32_t id;
+ uint8_t in_use : 1; /**< slot in use */
+
+ /* Memzones */
+ const struct rte_memzone *m_ctx; /**< KNI ctx */
+ const struct rte_memzone *m_tx_q; /**< TX queue */
+ const struct rte_memzone *m_rx_q; /**< RX queue */
+ const struct rte_memzone *m_alloc_q; /**< Allocated mbufs queue */
+ const struct rte_memzone *m_free_q; /**< To be freed mbufs queue */
+ const struct rte_memzone *m_req_q; /**< Request queue */
+ const struct rte_memzone *m_resp_q; /**< Response queue */
+ const struct rte_memzone *m_sync_addr;
+
+ /* Free linked list */
+ struct rte_kni_memzone_slot *next; /**< Next slot link.list */
+};
+
+/**
+ * KNI memzone pool
+ */
+struct rte_kni_memzone_pool {
+ uint8_t initialized : 1; /**< Global KNI pool init flag */
+
+ uint32_t max_ifaces; /**< Max. num of KNI ifaces */
+ struct rte_kni_memzone_slot *slots; /**< Pool slots */
+ rte_spinlock_t mutex; /**< alloc/relase mutex */
+
+ /* Free memzone slots linked-list */
+ struct rte_kni_memzone_slot *free; /**< First empty slot */
+ struct rte_kni_memzone_slot *free_tail; /**< Last empty slot */
+};
+
+
+static void kni_free_mbufs(struct rte_kni *kni);
+static void kni_allocate_mbufs(struct rte_kni *kni);
+
+static volatile int kni_fd = -1;
+static struct rte_kni_memzone_pool kni_memzone_pool = {
+ .initialized = 0,
+};
+
+static const struct rte_memzone *
+kni_memzone_reserve(const char *name, size_t len, int socket_id,
+ unsigned flags)
+{
+ const struct rte_memzone *mz = rte_memzone_lookup(name);
+
+ if (mz == NULL)
+ mz = rte_memzone_reserve(name, len, socket_id, flags);
+
+ return mz;
+}
+
+/* Pool mgmt */
+static struct rte_kni_memzone_slot*
+kni_memzone_pool_alloc(void)
+{
+ struct rte_kni_memzone_slot *slot;
+
+ rte_spinlock_lock(&kni_memzone_pool.mutex);
+
+ if (!kni_memzone_pool.free) {
+ rte_spinlock_unlock(&kni_memzone_pool.mutex);
+ return NULL;
+ }
+
+ slot = kni_memzone_pool.free;
+ kni_memzone_pool.free = slot->next;
+ slot->in_use = 1;
+
+ if (!kni_memzone_pool.free)
+ kni_memzone_pool.free_tail = NULL;
+
+ rte_spinlock_unlock(&kni_memzone_pool.mutex);
+
+ return slot;
+}
+
+static void
+kni_memzone_pool_release(struct rte_kni_memzone_slot *slot)
+{
+ rte_spinlock_lock(&kni_memzone_pool.mutex);
+
+ if (kni_memzone_pool.free)
+ kni_memzone_pool.free_tail->next = slot;
+ else
+ kni_memzone_pool.free = slot;
+
+ kni_memzone_pool.free_tail = slot;
+ slot->next = NULL;
+ slot->in_use = 0;
+
+ rte_spinlock_unlock(&kni_memzone_pool.mutex);
+}
+
+
+/* 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);
+ }
+
+ /* 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;
+
+ /* 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;
+
+ 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;
+ 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;
+
+
+ /* MBUF mempool */
+ snprintf(mz_name, sizeof(mz_name), RTE_MEMPOOL_OBJ_NAME,
+ pktmbuf_pool->name);
+ mz = rte_memzone_lookup(mz_name);
+ KNI_MEM_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->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;
+}
+
+static void
+kni_free_fifo(struct rte_kni_fifo *fifo)
+{
+ int ret;
+ struct rte_mbuf *pkt;
+
+ do {
+ ret = kni_fifo_get(fifo, (void **)&pkt, 1);
+ if (ret)
+ rte_pktmbuf_free(pkt);
+ } while (ret);
+}
+
+int
+rte_kni_release(struct rte_kni *kni)
+{
+ struct rte_kni_device_info dev_info;
+ uint32_t slot_id;
+
+ if (!kni || !kni->in_use)
+ return -1;
+
+ snprintf(dev_info.name, sizeof(dev_info.name), "%s", kni->name);
+ if (ioctl(kni_fd, RTE_KNI_IOCTL_RELEASE, &dev_info) < 0) {
+ RTE_LOG(ERR, KNI, "Fail to release kni device\n");
+ return -1;
+ }
+
+ /* mbufs in all fifo should be released, except request/response */
+ kni_free_fifo(kni->tx_q);
+ kni_free_fifo(kni->rx_q);
+ kni_free_fifo(kni->alloc_q);
+ kni_free_fifo(kni->free_q);
+
+ slot_id = kni->slot_id;
+
+ /* Memset the KNI struct */
+ memset(kni, 0, sizeof(struct rte_kni));
+
+ /* Release memzone */
+ if (slot_id > kni_memzone_pool.max_ifaces) {
+ rte_panic("KNI pool: corrupted slot ID: %d, max: %d\n",
+ slot_id, kni_memzone_pool.max_ifaces);
+ }
+ kni_memzone_pool_release(&kni_memzone_pool.slots[slot_id]);
+
+ return 0;
+}
+
+int
+rte_kni_handle_request(struct rte_kni *kni)
+{
+ unsigned ret;
+ struct rte_kni_request *req;
+
+ if (kni == NULL)
+ return -1;
+
+ /* Get request mbuf */
+ ret = kni_fifo_get(kni->req_q, (void **)&req, 1);
+ if (ret != 1)
+ return 0; /* It is OK of can not getting the request mbuf */
+
+ if (req != kni->sync_addr) {
+ rte_panic("Wrong req pointer %p\n", req);
+ }
+
+ /* Analyze the request and call the relevant actions for it */
+ switch (req->req_id) {
+ case RTE_KNI_REQ_CHANGE_MTU: /* Change MTU */
+ if (kni->ops.change_mtu)
+ req->result = kni->ops.change_mtu(kni->ops.port_id,
+ req->new_mtu);
+ break;
+ case RTE_KNI_REQ_CFG_NETWORK_IF: /* Set network interface up/down */
+ if (kni->ops.config_network_if)
+ req->result = kni->ops.config_network_if(\
+ kni->ops.port_id, req->if_up);
+ break;
+ default:
+ RTE_LOG(ERR, KNI, "Unknown request id %u\n", req->req_id);
+ req->result = -EINVAL;
+ break;
+ }
+
+ /* Construct response mbuf and put it back to resp_q */
+ ret = kni_fifo_put(kni->resp_q, (void **)&req, 1);
+ if (ret != 1) {
+ RTE_LOG(ERR, KNI, "Fail to put the muf back to resp_q\n");
+ return -1; /* It is an error of can't putting the mbuf back */
+ }
+
+ return 0;
+}
+
+unsigned
+rte_kni_tx_burst(struct rte_kni *kni, struct rte_mbuf **mbufs, unsigned num)
+{
+ unsigned ret = kni_fifo_put(kni->rx_q, (void **)mbufs, num);
+
+ /* Get mbufs from free_q and then free them */
+ kni_free_mbufs(kni);
+
+ return ret;
+}
+
+unsigned
+rte_kni_rx_burst(struct rte_kni *kni, struct rte_mbuf **mbufs, unsigned num)
+{
+ unsigned ret = kni_fifo_get(kni->tx_q, (void **)mbufs, num);
+
+ /* If buffers removed, allocate mbufs and then put them into alloc_q */
+ if (ret)
+ kni_allocate_mbufs(kni);
+
+ return ret;
+}
+
+static void
+kni_free_mbufs(struct rte_kni *kni)
+{
+ int i, ret;
+ struct rte_mbuf *pkts[MAX_MBUF_BURST_NUM];
+
+ ret = kni_fifo_get(kni->free_q, (void **)pkts, MAX_MBUF_BURST_NUM);
+ if (likely(ret > 0)) {
+ for (i = 0; i < ret; i++)
+ rte_pktmbuf_free(pkts[i]);
+ }
+}
+
+static void
+kni_allocate_mbufs(struct rte_kni *kni)
+{
+ int i, ret;
+ struct rte_mbuf *pkts[MAX_MBUF_BURST_NUM];
+
+ RTE_BUILD_BUG_ON(offsetof(struct rte_mbuf, pool) !=
+ offsetof(struct rte_kni_mbuf, pool));
+ RTE_BUILD_BUG_ON(offsetof(struct rte_mbuf, buf_addr) !=
+ offsetof(struct rte_kni_mbuf, buf_addr));
+ RTE_BUILD_BUG_ON(offsetof(struct rte_mbuf, next) !=
+ offsetof(struct rte_kni_mbuf, next));
+ RTE_BUILD_BUG_ON(offsetof(struct rte_mbuf, data_off) !=
+ offsetof(struct rte_kni_mbuf, data_off));
+ RTE_BUILD_BUG_ON(offsetof(struct rte_mbuf, data_len) !=
+ offsetof(struct rte_kni_mbuf, data_len));
+ RTE_BUILD_BUG_ON(offsetof(struct rte_mbuf, pkt_len) !=
+ offsetof(struct rte_kni_mbuf, pkt_len));
+ RTE_BUILD_BUG_ON(offsetof(struct rte_mbuf, ol_flags) !=
+ offsetof(struct rte_kni_mbuf, ol_flags));
+
+ /* Check if pktmbuf pool has been configured */
+ if (kni->pktmbuf_pool == NULL) {
+ RTE_LOG(ERR, KNI, "No valid mempool for allocating mbufs\n");
+ return;
+ }
+
+ for (i = 0; i < MAX_MBUF_BURST_NUM; i++) {
+ pkts[i] = rte_pktmbuf_alloc(kni->pktmbuf_pool);
+ if (unlikely(pkts[i] == NULL)) {
+ /* Out of memory */
+ RTE_LOG(ERR, KNI, "Out of memory\n");
+ break;
+ }
+ }
+
+ /* No pkt mbuf alocated */
+ if (i <= 0)
+ return;
+
+ ret = kni_fifo_put(kni->alloc_q, (void **)pkts, i);
+
+ /* Check if any mbufs not put into alloc_q, and then free them */
+ if (ret >= 0 && ret < i && ret < MAX_MBUF_BURST_NUM) {
+ int j;
+
+ for (j = ret; j < i; j++)
+ rte_pktmbuf_free(pkts[j]);
+ }
+}
+
+struct rte_kni *
+rte_kni_get(const char *name)
+{
+ uint32_t i;
+ struct rte_kni_memzone_slot *it;
+ struct rte_kni *kni;
+
+ /* Note: could be improved perf-wise if necessary */
+ for (i = 0; i < kni_memzone_pool.max_ifaces; i++) {
+ it = &kni_memzone_pool.slots[i];
+ if (it->in_use == 0)
+ continue;
+ kni = it->m_ctx->addr;
+ if (strncmp(kni->name, name, RTE_KNI_NAMESIZE) == 0)
+ return kni;
+ }
+
+ return NULL;
+}
+
+const char *
+rte_kni_get_name(const struct rte_kni *kni)
+{
+ return kni->name;
+}
+
+static enum kni_ops_status
+kni_check_request_register(struct rte_kni_ops *ops)
+{
+ /* check if KNI request ops has been registered*/
+ if( NULL == ops )
+ return KNI_REQ_NO_REGISTER;
+
+ if((NULL == ops->change_mtu) && (NULL == ops->config_network_if))
+ return KNI_REQ_NO_REGISTER;
+
+ return KNI_REQ_REGISTERED;
+}
+
+int
+rte_kni_register_handlers(struct rte_kni *kni,struct rte_kni_ops *ops)
+{
+ enum kni_ops_status req_status;
+
+ if (NULL == ops) {
+ RTE_LOG(ERR, KNI, "Invalid KNI request operation.\n");
+ return -1;
+ }
+
+ if (NULL == kni) {
+ RTE_LOG(ERR, KNI, "Invalid kni info.\n");
+ return -1;
+ }
+
+ req_status = kni_check_request_register(&kni->ops);
+ if ( KNI_REQ_REGISTERED == req_status) {
+ RTE_LOG(ERR, KNI, "The KNI request operation has already registered.\n");
+ return -1;
+ }
+
+ memcpy(&kni->ops, ops, sizeof(struct rte_kni_ops));
+ return 0;
+}
+
+int
+rte_kni_unregister_handlers(struct rte_kni *kni)
+{
+ if (NULL == kni) {
+ RTE_LOG(ERR, KNI, "Invalid kni info.\n");
+ return -1;
+ }
+
+ kni->ops.change_mtu = NULL;
+ kni->ops.config_network_if = NULL;
+ return 0;
+}
+void
+rte_kni_close(void)
+{
+ if (kni_fd < 0)
+ return;
+
+ close(kni_fd);
+ kni_fd = -1;
+}
Code Review / deb_dpdk.git / blobdiff