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 1
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 */
34 * Structure used to create GRO context objects or used to pass
35 * application-determined parameters to rte_gro_reassemble_burst().
37 struct rte_gro_param {
39 /**< desired GRO types */
40 uint16_t max_flow_num;
41 /**< max flow number */
42 uint16_t max_item_per_flow;
43 /**< max packet number per flow */
45 /**< socket index for allocating GRO related data structures,
46 * like reassembly tables. When use rte_gro_reassemble_burst(),
47 * applications don't need to set this value.
53 * @b EXPERIMENTAL: this API may change without prior notice
55 * This function create a GRO context object, which is used to merge
56 * packets in rte_gro_reassemble().
59 * applications use it to pass needed parameters to create a GRO
63 * if create successfully, return a pointer which points to the GRO
64 * context object. Otherwise, return NULL.
66 void *rte_gro_ctx_create(const struct rte_gro_param *param);
70 * @b EXPERIMENTAL: this API may change without prior notice
72 * This function destroys a GRO context object.
75 * pointer points to a GRO context object.
77 void rte_gro_ctx_destroy(void *ctx);
80 * This is one of the main reassembly APIs, which merges numbers of
81 * packets at a time. It doesn't check if input packets have correct
82 * checksums and doesn't re-calculate checksums for merged packets.
83 * It assumes the packets are complete (i.e., MF==0 && frag_off==0),
84 * when IP fragmentation is possible (i.e., DF==0). The GROed packets
85 * are returned as soon as the function finishes.
88 * Pointer array pointing to the packets to reassemble. Besides, it
89 * keeps MBUF addresses for the GROed packets.
91 * The number of packets to reassemble
93 * Application-determined parameters for reassembling packets.
96 * The number of packets after been GROed. If no packets are merged,
97 * the return value is equals to nb_pkts.
99 uint16_t rte_gro_reassemble_burst(struct rte_mbuf **pkts,
101 const struct rte_gro_param *param);
105 * @b EXPERIMENTAL: this API may change without prior notice
107 * Reassembly function, which tries to merge input packets with the
108 * existed packets in the reassembly tables of a given GRO context.
109 * It doesn't check if input packets have correct checksums and doesn't
110 * re-calculate checksums for merged packets. Additionally, it assumes
111 * the packets are complete (i.e., MF==0 && frag_off==0), when IP
112 * fragmentation is possible (i.e., DF==0).
114 * If the input packets have invalid parameters (e.g. no data payload,
115 * unsupported GRO types), they are returned to applications. Otherwise,
116 * they are either merged or inserted into the table. Applications need
117 * to flush packets from the tables by flush API, if they want to get the
121 * Packets to reassemble. It's also used to store the unprocessed packets.
123 * The number of packets to reassemble
125 * GRO context object pointer
128 * The number of unprocessed packets.
130 uint16_t rte_gro_reassemble(struct rte_mbuf **pkts,
136 * @b EXPERIMENTAL: this API may change without prior notice
138 * This function flushes the timeout packets from the reassembly tables
139 * of desired GRO types. The max number of flushed packets is the
140 * element number of 'out'.
142 * Additionally, the flushed packets may have incorrect checksums, since
143 * this function doesn't re-calculate checksums for merged packets.
146 * GRO context object pointer.
147 * @param timeout_cycles
148 * The max TTL for packets in reassembly tables, measured in nanosecond.
150 * This function flushes packets whose GRO types are specified by
153 * Pointer array used to keep flushed packets.
155 * The element number of 'out'. It's also the max number of timeout
156 * packets that can be flushed finally.
159 * The number of flushed packets.
161 uint16_t rte_gro_timeout_flush(void *ctx,
162 uint64_t timeout_cycles,
164 struct rte_mbuf **out,
165 uint16_t max_nb_out);
169 * @b EXPERIMENTAL: this API may change without prior notice
171 * This function returns the number of packets in all reassembly tables
172 * of a given GRO context.
175 * GRO context object pointer.
178 * The number of packets in the tables.
180 uint64_t rte_gro_get_pkt_count(void *ctx);
186 #endif /* _RTE_GRO_H_ */