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/* SPDX-License-Identifier: BSD-3-Clause
* Copyright(c) 2019 Cesnet
* Copyright(c) 2019 Netcope Technologies, a.s. <info@netcope.com>
* All rights reserved.
*/
#ifndef _NFB_TX_H_
#define _NFB_TX_H_
#include <nfb/nfb.h>
#include <nfb/ndp.h>
#include <rte_ethdev.h>
#include <rte_malloc.h>
struct ndp_tx_queue {
struct nfb_device *nfb; /* nfb dev structure */
struct ndp_queue *queue; /* tx queue */
uint16_t tx_queue_id; /* index */
volatile uint64_t tx_pkts; /* packets transmitted */
volatile uint64_t tx_bytes; /* bytes transmitted */
volatile uint64_t err_pkts; /* erroneous packets */
};
/**
* DPDK callback to setup a TX queue for use.
*
* @param dev
* Pointer to Ethernet device structure.
* @param idx
* RX queue index.
* @param desc
* Number of descriptors to configure in queue.
* @param socket
* NUMA socket on which memory must be allocated.
* @param[in] conf
* Thresholds parameters.
* @param mp
* Memory pool for buffer allocations.
*
* @return
* 0 on success, a negative errno value otherwise.
*/
int
nfb_eth_tx_queue_setup(struct rte_eth_dev *dev,
uint16_t tx_queue_id,
uint16_t nb_tx_desc __rte_unused,
unsigned int socket_id,
const struct rte_eth_txconf *tx_conf __rte_unused);
/**
* Initialize ndp_tx_queue structure
*
* @param nfb
* Pointer to nfb device structure.
* @param tx_queue_id
* TX queue index.
* @param[out] txq
* Pointer to ndp_tx_queue output structure
*
* @return
* 0 on success, a negative errno value otherwise.
*/
int
nfb_eth_tx_queue_init(struct nfb_device *nfb,
uint16_t tx_queue_id,
struct ndp_tx_queue *txq);
/**
* DPDK callback to release a RX queue.
*
* @param dpdk_rxq
* Generic RX queue pointer.
*/
void
nfb_eth_tx_queue_release(void *q);
/**
* Start traffic on Tx queue.
*
* @param dev
* Pointer to Ethernet device structure.
* @param txq_id
* TX queue index.
*
* @return
* 0 on success, a negative errno value otherwise.
*/
int
nfb_eth_tx_queue_start(struct rte_eth_dev *dev, uint16_t txq_id);
/**
* Stop traffic on Tx queue.
*
* @param dev
* Pointer to Ethernet device structure.
* @param txq_id
* TX queue index.
*
* @return
* 0 on success, a negative errno value otherwise.
*/
int
nfb_eth_tx_queue_stop(struct rte_eth_dev *dev, uint16_t txq_id);
/**
* DPDK callback for TX.
*
* @param dpdk_txq
* Generic pointer to TX queue structure.
* @param bufs
* Packets to transmit.
* @param nb_pkts
* Number of packets in array.
*
* @return
* Number of packets successfully transmitted (<= nb_pkts).
*/
static __rte_always_inline uint16_t
nfb_eth_ndp_tx(void *queue,
struct rte_mbuf **bufs,
uint16_t nb_pkts)
{
int i;
struct rte_mbuf *mbuf;
struct ndp_tx_queue *ndp = queue;
uint16_t num_tx = 0;
uint64_t num_bytes = 0;
void *dst;
uint32_t pkt_len;
uint8_t mbuf_segs;
struct ndp_packet packets[nb_pkts];
if (unlikely(ndp->queue == NULL || nb_pkts == 0)) {
RTE_LOG(ERR, PMD, "TX invalid arguments!\n");
return 0;
}
for (i = 0; i < nb_pkts; i++) {
packets[i].data_length = bufs[i]->pkt_len;
packets[i].header_length = 0;
}
num_tx = ndp_tx_burst_get(ndp->queue, packets, nb_pkts);
if (unlikely(num_tx != nb_pkts))
return 0;
for (i = 0; i < nb_pkts; ++i) {
mbuf = bufs[i];
pkt_len = mbuf->pkt_len;
mbuf_segs = mbuf->nb_segs;
num_bytes += pkt_len;
if (mbuf_segs == 1) {
/*
* non-scattered packet,
* transmit from one mbuf
*/
rte_memcpy(packets[i].data,
rte_pktmbuf_mtod(mbuf, const void *),
pkt_len);
} else {
/* scattered packet, transmit from more mbufs */
struct rte_mbuf *m = mbuf;
while (m) {
dst = packets[i].data;
rte_memcpy(dst,
rte_pktmbuf_mtod(m,
const void *),
m->data_len);
dst = ((uint8_t *)(dst)) +
m->data_len;
m = m->next;
}
}
rte_pktmbuf_free(mbuf);
}
ndp_tx_burst_flush(ndp->queue);
ndp->tx_pkts += num_tx;
ndp->err_pkts += nb_pkts - num_tx;
ndp->tx_bytes += num_bytes;
return num_tx;
}
#endif /* _NFB_TX_H_ */
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