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41 * The KNI library provides the ability to create and destroy kernel NIC
42 * interfaces that may be used by the RTE application to receive/transmit
43 * packets from/to Linux kernel net interfaces.
45 * This library provide two APIs to burst receive packets from KNI interfaces,
46 * and burst transmit packets to KNI interfaces.
52 #include <exec-env/rte_kni_common.h>
61 * Structure which has the function pointers for KNI interface.
64 uint8_t port_id; /* Port ID */
66 /* Pointer to function of changing MTU */
67 int (*change_mtu)(uint8_t port_id, unsigned new_mtu);
69 /* Pointer to function of configuring network interface */
70 int (*config_network_if)(uint8_t port_id, uint8_t if_up);
74 * Structure for configuring KNI device.
78 * KNI name which will be used in relevant network device.
79 * Let the name as short as possible, as it will be part of
82 char name[RTE_KNI_NAMESIZE];
83 uint32_t core_id; /* Core ID to bind kernel thread on */
84 uint16_t group_id; /* Group ID */
85 unsigned mbuf_size; /* mbuf size */
86 struct rte_pci_addr addr;
89 uint8_t force_bind : 1; /* Flag to bind kernel thread */
93 * Allocate KNI interface according to the port id, mbuf size, mbuf pool,
94 * configurations and callbacks for kernel requests.The KNI interface created
95 * in the kernel space is the net interface the traditional Linux application
99 * The mempool for allocting mbufs for packets.
101 * The pointer to the configurations of the KNI device.
103 * The pointer to the callbacks for the KNI kernel requests.
106 * - The pointer to the context of a KNI interface.
107 * - NULL indicate error.
109 extern struct rte_kni *rte_kni_alloc(struct rte_mempool *pktmbuf_pool,
110 const struct rte_kni_conf *conf,
111 struct rte_kni_ops *ops);
114 * It create a KNI device for specific port.
116 * Note: It is deprecated and just for backward compatibility.
122 * @param pktmbuf_pool
123 * The mempool for allocting mbufs for packets.
125 * The pointer to the callbacks for the KNI kernel requests.
128 * - The pointer to the context of a KNI interface.
129 * - NULL indicate error.
131 extern struct rte_kni *rte_kni_create(uint8_t port_id,
133 struct rte_mempool *pktmbuf_pool,
134 struct rte_kni_ops *ops) \
135 __attribute__ ((deprecated));
138 * Release KNI interface according to the context. It will also release the
139 * paired KNI interface in kernel space. All processing on the specific KNI
140 * context need to be stopped before calling this interface.
143 * The pointer to the context of an existent KNI interface.
146 * - 0 indicates success.
147 * - negative value indicates failure.
149 extern int rte_kni_release(struct rte_kni *kni);
152 * It is used to handle the request mbufs sent from kernel space.
153 * Then analyzes it and calls the specific actions for the specific requests.
154 * Finally constructs the response mbuf and puts it back to the resp_q.
157 * The pointer to the context of an existent KNI interface.
161 * - negative value indicates failure.
163 extern int rte_kni_handle_request(struct rte_kni *kni);
166 * Retrieve a burst of packets from a KNI interface. The retrieved packets are
167 * stored in rte_mbuf structures whose pointers are supplied in the array of
168 * mbufs, and the maximum number is indicated by num. It handles the freeing of
169 * the mbufs in the free queue of KNI interface.
172 * The KNI interface context.
174 * The array to store the pointers of mbufs.
176 * The maximum number per burst.
179 * The actual number of packets retrieved.
181 extern unsigned rte_kni_rx_burst(struct rte_kni *kni,
182 struct rte_mbuf **mbufs, unsigned num);
185 * Send a burst of packets to a KNI interface. The packets to be sent out are
186 * stored in rte_mbuf structures whose pointers are supplied in the array of
187 * mbufs, and the maximum number is indicated by num. It handles allocating
188 * the mbufs for KNI interface alloc queue.
191 * The KNI interface context.
193 * The array to store the pointers of mbufs.
195 * The maximum number per burst.
198 * The actual number of packets sent.
200 extern unsigned rte_kni_tx_burst(struct rte_kni *kni,
201 struct rte_mbuf **mbufs, unsigned num);
204 * Get the port id from KNI interface.
206 * Note: It is deprecated and just for backward compatibility.
209 * The KNI interface context.
212 * On success: The port id.
215 extern uint8_t rte_kni_get_port_id(struct rte_kni *kni) \
216 __attribute__ ((deprecated));
219 * Get the KNI context of its name.
222 * pointer to the KNI device name.
225 * On success: Pointer to KNI interface.
228 extern struct rte_kni *rte_kni_get(const char *name);
231 * Get the KNI context of the specific port.
233 * Note: It is deprecated and just for backward compatibility.
239 * On success: Pointer to KNI interface.
242 extern struct rte_kni *rte_kni_info_get(uint8_t port_id) \
243 __attribute__ ((deprecated));
246 * Register KNI request handling for a specified port,and it can
247 * be called by master process or slave process.
250 * pointer to struct rte_kni.
252 * ponter to struct rte_kni_ops.
258 extern int rte_kni_register_handlers(struct rte_kni *kni,
259 struct rte_kni_ops *ops);
262 * Unregister KNI request handling for a specified port.
265 * pointer to struct rte_kni.
271 extern int rte_kni_unregister_handlers(struct rte_kni *kni);
281 extern void rte_kni_close(void);
287 #endif /* _RTE_KNI_H_ */