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 GRO flag. */
37 * Structure used to create GRO context objects or used to pass
38 * application-determined parameters to rte_gro_reassemble_burst().
40 struct rte_gro_param {
42 /**< desired GRO types */
43 uint16_t max_flow_num;
44 /**< max flow number */
45 uint16_t max_item_per_flow;
46 /**< max packet number per flow */
48 /**< socket index for allocating GRO related data structures,
49 * like reassembly tables. When use rte_gro_reassemble_burst(),
50 * applications don't need to set this value.
56 * @b EXPERIMENTAL: this API may change without prior notice
58 * This function create a GRO context object, which is used to merge
59 * packets in rte_gro_reassemble().
62 * applications use it to pass needed parameters to create a GRO
66 * if create successfully, return a pointer which points to the GRO
67 * context object. Otherwise, return NULL.
69 void *rte_gro_ctx_create(const struct rte_gro_param *param);
73 * @b EXPERIMENTAL: this API may change without prior notice
75 * This function destroys a GRO context object.
78 * pointer points to a GRO context object.
80 void rte_gro_ctx_destroy(void *ctx);
83 * This is one of the main reassembly APIs, which merges numbers of
84 * packets at a time. It doesn't check if input packets have correct
85 * checksums and doesn't re-calculate checksums for merged packets.
86 * It assumes the packets are complete (i.e., MF==0 && frag_off==0),
87 * when IP fragmentation is possible (i.e., DF==0). The GROed packets
88 * are returned as soon as the function finishes.
91 * Pointer array pointing to the packets to reassemble. Besides, it
92 * keeps MBUF addresses for the GROed packets.
94 * The number of packets to reassemble
96 * Application-determined parameters for reassembling packets.
99 * The number of packets after been GROed. If no packets are merged,
100 * the return value is equals to nb_pkts.
102 uint16_t rte_gro_reassemble_burst(struct rte_mbuf **pkts,
104 const struct rte_gro_param *param);
108 * @b EXPERIMENTAL: this API may change without prior notice
110 * Reassembly function, which tries to merge input packets with the
111 * existed packets in the reassembly tables of a given GRO context.
112 * It doesn't check if input packets have correct checksums and doesn't
113 * re-calculate checksums for merged packets. Additionally, it assumes
114 * the packets are complete (i.e., MF==0 && frag_off==0), when IP
115 * fragmentation is possible (i.e., DF==0).
117 * If the input packets have invalid parameters (e.g. no data payload,
118 * unsupported GRO types), they are returned to applications. Otherwise,
119 * they are either merged or inserted into the table. Applications need
120 * to flush packets from the tables by flush API, if they want to get the
124 * Packets to reassemble. It's also used to store the unprocessed packets.
126 * The number of packets to reassemble
128 * GRO context object pointer
131 * The number of unprocessed packets.
133 uint16_t rte_gro_reassemble(struct rte_mbuf **pkts,
139 * @b EXPERIMENTAL: this API may change without prior notice
141 * This function flushes the timeout packets from the reassembly tables
142 * of desired GRO types. The max number of flushed packets is the
143 * element number of 'out'.
145 * Additionally, the flushed packets may have incorrect checksums, since
146 * this function doesn't re-calculate checksums for merged packets.
149 * GRO context object pointer.
150 * @param timeout_cycles
151 * The max TTL for packets in reassembly tables, measured in nanosecond.
153 * This function flushes packets whose GRO types are specified by
156 * Pointer array used to keep flushed packets.
158 * The element number of 'out'. It's also the max number of timeout
159 * packets that can be flushed finally.
162 * The number of flushed packets.
164 uint16_t rte_gro_timeout_flush(void *ctx,
165 uint64_t timeout_cycles,
167 struct rte_mbuf **out,
168 uint16_t max_nb_out);
172 * @b EXPERIMENTAL: this API may change without prior notice
174 * This function returns the number of packets in all reassembly tables
175 * of a given GRO context.
178 * GRO context object pointer.
181 * The number of packets in the tables.
183 uint64_t rte_gro_get_pkt_count(void *ctx);
189 #endif /* _RTE_GRO_H_ */