1 /* SPDX-License-Identifier: BSD-3-Clause
2 * Copyright(c) 2010-2014 Intel Corporation
12 * The KNI library provides the ability to create and destroy kernel NIC
13 * interfaces that may be used by the RTE application to receive/transmit
14 * packets from/to Linux kernel net interfaces.
16 * This library provides two APIs to burst receive packets from KNI interfaces,
17 * and burst transmit packets to KNI interfaces.
21 #include <rte_memory.h>
22 #include <rte_mempool.h>
23 #include <rte_ether.h>
25 #include <exec-env/rte_kni_common.h>
35 * Structure which has the function pointers for KNI interface.
38 uint16_t port_id; /* Port ID */
40 /* Pointer to function of changing MTU */
41 int (*change_mtu)(uint16_t port_id, unsigned int new_mtu);
43 /* Pointer to function of configuring network interface */
44 int (*config_network_if)(uint16_t port_id, uint8_t if_up);
46 /* Pointer to function of configuring mac address */
47 int (*config_mac_address)(uint16_t port_id, uint8_t mac_addr[]);
49 /* Pointer to function of configuring promiscuous mode */
50 int (*config_promiscusity)(uint16_t port_id, uint8_t to_on);
54 * Structure for configuring KNI device.
58 * KNI name which will be used in relevant network device.
59 * Let the name as short as possible, as it will be part of
62 char name[RTE_KNI_NAMESIZE];
63 uint32_t core_id; /* Core ID to bind kernel thread on */
64 uint16_t group_id; /* Group ID */
65 unsigned mbuf_size; /* mbuf size */
66 struct rte_pci_addr addr;
70 uint8_t force_bind : 1; /* Flag to bind kernel thread */
71 char mac_addr[ETHER_ADDR_LEN]; /* MAC address assigned to KNI */
75 * Initialize and preallocate KNI subsystem
77 * This function is to be executed on the MASTER lcore only, after EAL
78 * initialization and before any KNI interface is attempted to be
81 * @param max_kni_ifaces
82 * The maximum number of KNI interfaces that can coexist concurrently
84 void rte_kni_init(unsigned int max_kni_ifaces);
88 * Allocate KNI interface according to the port id, mbuf size, mbuf pool,
89 * configurations and callbacks for kernel requests.The KNI interface created
90 * in the kernel space is the net interface the traditional Linux application
93 * The rte_kni_alloc shall not be called before rte_kni_init() has been
94 * called. rte_kni_alloc is thread safe.
96 * The mempool should have capacity of more than "2 x KNI_FIFO_COUNT_MAX"
97 * elements for each KNI interface allocated.
100 * The mempool for allocating mbufs for packets.
102 * The pointer to the configurations of the KNI device.
104 * The pointer to the callbacks for the KNI kernel requests.
107 * - The pointer to the context of a KNI interface.
108 * - NULL indicate error.
110 struct rte_kni *rte_kni_alloc(struct rte_mempool *pktmbuf_pool,
111 const struct rte_kni_conf *conf, struct rte_kni_ops *ops);
114 * Release KNI interface according to the context. It will also release the
115 * paired KNI interface in kernel space. All processing on the specific KNI
116 * context need to be stopped before calling this interface.
118 * rte_kni_release is thread safe.
121 * The pointer to the context of an existent KNI interface.
124 * - 0 indicates success.
125 * - negative value indicates failure.
127 int rte_kni_release(struct rte_kni *kni);
130 * It is used to handle the request mbufs sent from kernel space.
131 * Then analyzes it and calls the specific actions for the specific requests.
132 * Finally constructs the response mbuf and puts it back to the resp_q.
135 * The pointer to the context of an existent KNI interface.
139 * - negative value indicates failure.
141 int rte_kni_handle_request(struct rte_kni *kni);
144 * Retrieve a burst of packets from a KNI interface. The retrieved packets are
145 * stored in rte_mbuf structures whose pointers are supplied in the array of
146 * mbufs, and the maximum number is indicated by num. It handles allocating
147 * the mbufs for KNI interface alloc queue.
150 * The KNI interface context.
152 * The array to store the pointers of mbufs.
154 * The maximum number per burst.
157 * The actual number of packets retrieved.
159 unsigned rte_kni_rx_burst(struct rte_kni *kni, struct rte_mbuf **mbufs,
163 * Send a burst of packets to a KNI interface. The packets to be sent out are
164 * stored in rte_mbuf structures whose pointers are supplied in the array of
165 * mbufs, and the maximum number is indicated by num. It handles the freeing of
166 * the mbufs in the free queue of KNI interface.
169 * The KNI interface context.
171 * The array to store the pointers of mbufs.
173 * The maximum number per burst.
176 * The actual number of packets sent.
178 unsigned rte_kni_tx_burst(struct rte_kni *kni, struct rte_mbuf **mbufs,
182 * Get the KNI context of its name.
185 * pointer to the KNI device name.
188 * On success: Pointer to KNI interface.
191 struct rte_kni *rte_kni_get(const char *name);
194 * Get the name given to a KNI device
197 * The KNI instance to query
199 * The pointer to the KNI name
201 const char *rte_kni_get_name(const struct rte_kni *kni);
204 * Register KNI request handling for a specified port,and it can
205 * be called by master process or slave process.
208 * pointer to struct rte_kni.
210 * pointer to struct rte_kni_ops.
216 int rte_kni_register_handlers(struct rte_kni *kni, struct rte_kni_ops *ops);
219 * Unregister KNI request handling for a specified port.
222 * pointer to struct rte_kni.
228 int rte_kni_unregister_handlers(struct rte_kni *kni);
233 void rte_kni_close(void);
239 #endif /* _RTE_KNI_H_ */