1 /* SPDX-License-Identifier: BSD-3-Clause
2 * Copyright(c) 2017 Intel Corporation
10 * Interface to GRO library
20 #define RTE_GRO_MAX_BURST_ITEM_NUM 128U
21 /**< the max number of packets that rte_gro_reassemble_burst()
22 * can process in each invocation.
24 #define RTE_GRO_TYPE_MAX_NUM 64
25 /**< the max number of supported GRO types */
26 #define RTE_GRO_TYPE_SUPPORT_NUM 2
27 /**< the number of currently supported GRO types */
29 #define RTE_GRO_TCP_IPV4_INDEX 0
30 #define RTE_GRO_TCP_IPV4 (1ULL << RTE_GRO_TCP_IPV4_INDEX)
31 /**< TCP/IPv4 GRO flag */
32 #define RTE_GRO_IPV4_VXLAN_TCP_IPV4_INDEX 1
33 #define RTE_GRO_IPV4_VXLAN_TCP_IPV4 (1ULL << RTE_GRO_IPV4_VXLAN_TCP_IPV4_INDEX)
34 /**< VxLAN TCP/IPv4 GRO flag. */
35 #define RTE_GRO_UDP_IPV4_INDEX 2
36 #define RTE_GRO_UDP_IPV4 (1ULL << RTE_GRO_UDP_IPV4_INDEX)
37 /**< UDP/IPv4 GRO flag */
40 * Structure used to create GRO context objects or used to pass
41 * application-determined parameters to rte_gro_reassemble_burst().
43 struct rte_gro_param {
45 /**< desired GRO types */
46 uint16_t max_flow_num;
47 /**< max flow number */
48 uint16_t max_item_per_flow;
49 /**< max packet number per flow */
51 /**< socket index for allocating GRO related data structures,
52 * like reassembly tables. When use rte_gro_reassemble_burst(),
53 * applications don't need to set this value.
59 * @b EXPERIMENTAL: this API may change without prior notice
61 * This function create a GRO context object, which is used to merge
62 * packets in rte_gro_reassemble().
65 * applications use it to pass needed parameters to create a GRO
69 * if create successfully, return a pointer which points to the GRO
70 * context object. Otherwise, return NULL.
72 void *rte_gro_ctx_create(const struct rte_gro_param *param);
76 * @b EXPERIMENTAL: this API may change without prior notice
78 * This function destroys a GRO context object.
81 * pointer points to a GRO context object.
83 void rte_gro_ctx_destroy(void *ctx);
86 * This is one of the main reassembly APIs, which merges numbers of
87 * packets at a time. It doesn't check if input packets have correct
88 * checksums and doesn't re-calculate checksums for merged packets.
89 * It assumes the packets are complete (i.e., MF==0 && frag_off==0),
90 * when IP fragmentation is possible (i.e., DF==0). The GROed packets
91 * are returned as soon as the function finishes.
94 * Pointer array pointing to the packets to reassemble. Besides, it
95 * keeps MBUF addresses for the GROed packets.
97 * The number of packets to reassemble
99 * Application-determined parameters for reassembling packets.
102 * The number of packets after been GROed. If no packets are merged,
103 * the return value is equals to nb_pkts.
105 uint16_t rte_gro_reassemble_burst(struct rte_mbuf **pkts,
107 const struct rte_gro_param *param);
111 * @b EXPERIMENTAL: this API may change without prior notice
113 * Reassembly function, which tries to merge input packets with the
114 * existed packets in the reassembly tables of a given GRO context.
115 * It doesn't check if input packets have correct checksums and doesn't
116 * re-calculate checksums for merged packets. Additionally, it assumes
117 * the packets are complete (i.e., MF==0 && frag_off==0), when IP
118 * fragmentation is possible (i.e., DF==0).
120 * If the input packets have invalid parameters (e.g. no data payload,
121 * unsupported GRO types), they are returned to applications. Otherwise,
122 * they are either merged or inserted into the table. Applications need
123 * to flush packets from the tables by flush API, if they want to get the
127 * Packets to reassemble. It's also used to store the unprocessed packets.
129 * The number of packets to reassemble
131 * GRO context object pointer
134 * The number of unprocessed packets.
136 uint16_t rte_gro_reassemble(struct rte_mbuf **pkts,
142 * @b EXPERIMENTAL: this API may change without prior notice
144 * This function flushes the timeout packets from the reassembly tables
145 * of desired GRO types. The max number of flushed packets is the
146 * element number of 'out'.
148 * Additionally, the flushed packets may have incorrect checksums, since
149 * this function doesn't re-calculate checksums for merged packets.
152 * GRO context object pointer.
153 * @param timeout_cycles
154 * The max TTL for packets in reassembly tables, measured in nanosecond.
156 * This function flushes packets whose GRO types are specified by
159 * Pointer array used to keep flushed packets.
161 * The element number of 'out'. It's also the max number of timeout
162 * packets that can be flushed finally.
165 * The number of flushed packets.
167 uint16_t rte_gro_timeout_flush(void *ctx,
168 uint64_t timeout_cycles,
170 struct rte_mbuf **out,
171 uint16_t max_nb_out);
175 * @b EXPERIMENTAL: this API may change without prior notice
177 * This function returns the number of packets in all reassembly tables
178 * of a given GRO context.
181 * GRO context object pointer.
184 * The number of packets in the tables.
186 uint64_t rte_gro_get_pkt_count(void *ctx);
192 #endif /* _RTE_GRO_H_ */