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/* SPDX-License-Identifier: BSD-3-Clause
* Copyright(C) 2025 Marvell International Ltd.
*/
#include <arpa/inet.h>
#include <sys/socket.h>
#include <rte_ethdev.h>
#include <rte_ether.h>
#include <rte_graph_feature_arc_worker.h>
#include <rte_malloc.h>
#include "rte_node_ip4_api.h"
#include "node_private.h"
#include "interface_tx_feature_priv.h"
#define IF_TX_FEATURE_LAST_NEXT_INDEX(ctx) \
(((struct if_tx_feature_node_ctx *)ctx)->last_index)
/*
* @internal array for mapping port to next node index
*/
struct if_tx_feature_node_main {
uint16_t next_index[RTE_MAX_ETHPORTS];
};
struct if_tx_feature_node_ctx {
uint16_t last_index;
};
static struct if_tx_feature_node_main *if_tx_feature_nm;
int
if_tx_feature_node_set_next(uint16_t port_id, uint16_t next_index)
{
if (if_tx_feature_nm == NULL) {
if_tx_feature_nm = rte_zmalloc(
"if_tx_feature_nm", sizeof(struct if_tx_feature_node_main),
RTE_CACHE_LINE_SIZE);
if (if_tx_feature_nm == NULL)
return -ENOMEM;
}
if_tx_feature_nm->next_index[port_id] = next_index;
return 0;
}
static int
if_tx_feature_node_init(const struct rte_graph *graph, struct rte_node *node)
{
RTE_SET_USED(graph);
/* pkt_drop */
IF_TX_FEATURE_LAST_NEXT_INDEX(node->ctx) = 0;
return 0;
}
static uint16_t
if_tx_feature_node_process(struct rte_graph *graph, struct rte_node *node,
void **objs, uint16_t nb_objs)
{
uint16_t held = 0, next0 = 0, next1 = 0, next2 = 0, next3 = 0;
struct rte_mbuf *mbuf0, *mbuf1, *mbuf2, *mbuf3, **pkts;
uint16_t last_spec = 0, fix_spec = 0;
void **to_next, **from;
rte_edge_t next_index;
uint16_t n_left_from;
/* Speculative next */
next_index = IF_TX_FEATURE_LAST_NEXT_INDEX(node->ctx);
from = objs;
n_left_from = nb_objs;
pkts = (struct rte_mbuf **)objs;
to_next = rte_node_next_stream_get(graph, node, next_index, nb_objs);
while (n_left_from > 4) {
if (likely(n_left_from > 7)) {
/* Prefetch next mbuf */
rte_prefetch0(objs[4]);
rte_prefetch0(objs[5]);
rte_prefetch0(objs[6]);
rte_prefetch0(objs[7]);
}
mbuf0 = pkts[0];
mbuf1 = pkts[1];
mbuf2 = pkts[2];
mbuf3 = pkts[3];
pkts += 4;
n_left_from -= 4;
/* port-tx node starts from next edge 1*/
next0 = if_tx_feature_nm->next_index[mbuf0->port];
next1 = if_tx_feature_nm->next_index[mbuf1->port];
next2 = if_tx_feature_nm->next_index[mbuf2->port];
next3 = if_tx_feature_nm->next_index[mbuf3->port];
fix_spec = (next_index ^ next0) | (next_index ^ next1) |
(next_index ^ next2) | (next_index ^ next3);
if (unlikely(fix_spec)) {
/* Copy things successfully speculated till now */
rte_memcpy(to_next, from,
last_spec * sizeof(from[0]));
from += last_spec;
to_next += last_spec;
held += last_spec;
last_spec = 0;
if (next0 == next_index) {
to_next[0] = from[0];
to_next++;
held++;
} else {
rte_node_enqueue_x1(graph, node,
next0, from[0]);
}
if (next1 == next_index) {
to_next[0] = from[1];
to_next++;
held++;
} else {
rte_node_enqueue_x1(graph, node,
next1, from[1]);
}
if (next2 == next_index) {
to_next[0] = from[2];
to_next++;
held++;
} else {
rte_node_enqueue_x1(graph, node,
next2, from[2]);
}
if (next3 == next_index) {
to_next[0] = from[3];
to_next++;
held++;
} else {
rte_node_enqueue_x1(graph, node,
next3, from[3]);
}
from += 4;
} else {
last_spec += 4;
}
}
while (n_left_from > 0) {
mbuf0 = pkts[0];
pkts += 1;
n_left_from -= 1;
next0 = if_tx_feature_nm->next_index[mbuf0->port];
if (unlikely(next0 != next_index)) {
/* Copy things successfully speculated till now */
rte_memcpy(to_next, from,
last_spec * sizeof(from[0]));
from += last_spec;
to_next += last_spec;
held += last_spec;
last_spec = 0;
rte_node_enqueue_x1(graph, node,
next0, from[0]);
from += 1;
} else {
last_spec += 1;
}
}
/* !!! Home run !!! */
if (likely(last_spec == nb_objs)) {
rte_node_next_stream_move(graph, node, next_index);
return nb_objs;
}
held += last_spec;
rte_memcpy(to_next, from, last_spec * sizeof(from[0]));
rte_node_next_stream_put(graph, node, next_index, held);
IF_TX_FEATURE_LAST_NEXT_INDEX(node->ctx) = next0;
return nb_objs;
}
static struct rte_node_register if_tx_feature_node = {
.process = if_tx_feature_node_process,
.init = if_tx_feature_node_init,
.name = "interface_tx",
.nb_edges = 1,
.next_nodes = {
[0] = "pkt_drop",
},
};
struct rte_node_register *
if_tx_feature_node_get(void)
{
return &if_tx_feature_node;
}
RTE_NODE_REGISTER(if_tx_feature_node);
/* if_tx feature node */
struct rte_graph_feature_register if_tx_feature = {
.feature_name = RTE_IP4_OUTPUT_END_FEATURE_NAME,
.arc_name = RTE_IP4_OUTPUT_FEATURE_ARC_NAME,
.feature_process_fn = if_tx_feature_node_process,
.feature_node = &if_tx_feature_node,
};
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