3c4426db54
Calling Rx/Tx functions on a stopped queue is not supported.
Do not run packet forwarding for streams that use stopped queues.
Each stream has a read-only "disabled" field,
so that lcore function can skip such streams.
Forwarding engines can set this field
using a new "stream_init" callback function
by checking relevant queue states,
which are stored along with queue configurations
(not all PMDs implement rte_eth_rx/tx_queue_info_get()
to query the state from there).
Fixes: 5f4ec54f1d ("testpmd: queue start and stop")
Cc: stable@dpdk.org
Signed-off-by: Dmitry Kozlyuk <dkozlyuk@nvidia.com>
Acked-by: Matan Azrad <matan@nvidia.com>
110 lines
2.5 KiB
C
110 lines
2.5 KiB
C
/* SPDX-License-Identifier: BSD-3-Clause
|
|
* Copyright(c) 2010-2014 Intel Corporation
|
|
*/
|
|
|
|
#include <stdarg.h>
|
|
#include <stdio.h>
|
|
#include <string.h>
|
|
#include <errno.h>
|
|
#include <stdint.h>
|
|
#include <unistd.h>
|
|
#include <inttypes.h>
|
|
|
|
#include <sys/queue.h>
|
|
#include <sys/stat.h>
|
|
|
|
#include <rte_common.h>
|
|
#include <rte_byteorder.h>
|
|
#include <rte_log.h>
|
|
#include <rte_debug.h>
|
|
#include <rte_cycles.h>
|
|
#include <rte_memory.h>
|
|
#include <rte_launch.h>
|
|
#include <rte_eal.h>
|
|
#include <rte_per_lcore.h>
|
|
#include <rte_lcore.h>
|
|
#include <rte_branch_prediction.h>
|
|
#include <rte_memcpy.h>
|
|
#include <rte_mempool.h>
|
|
#include <rte_mbuf.h>
|
|
#include <rte_interrupts.h>
|
|
#include <rte_pci.h>
|
|
#include <rte_ether.h>
|
|
#include <rte_ethdev.h>
|
|
#include <rte_string_fns.h>
|
|
#include <rte_flow.h>
|
|
|
|
#include "testpmd.h"
|
|
|
|
/*
|
|
* Forwarding of packets in I/O mode.
|
|
* Forward packets "as-is".
|
|
* This is the fastest possible forwarding operation, as it does not access
|
|
* to packets data.
|
|
*/
|
|
static void
|
|
pkt_burst_io_forward(struct fwd_stream *fs)
|
|
{
|
|
struct rte_mbuf *pkts_burst[MAX_PKT_BURST];
|
|
uint16_t nb_rx;
|
|
uint16_t nb_tx;
|
|
uint32_t retry;
|
|
uint64_t start_tsc = 0;
|
|
|
|
get_start_cycles(&start_tsc);
|
|
|
|
/*
|
|
* Receive a burst of packets and forward them.
|
|
*/
|
|
nb_rx = rte_eth_rx_burst(fs->rx_port, fs->rx_queue,
|
|
pkts_burst, nb_pkt_per_burst);
|
|
inc_rx_burst_stats(fs, nb_rx);
|
|
if (unlikely(nb_rx == 0))
|
|
return;
|
|
fs->rx_packets += nb_rx;
|
|
|
|
nb_tx = rte_eth_tx_burst(fs->tx_port, fs->tx_queue,
|
|
pkts_burst, nb_rx);
|
|
/*
|
|
* Retry if necessary
|
|
*/
|
|
if (unlikely(nb_tx < nb_rx) && fs->retry_enabled) {
|
|
retry = 0;
|
|
while (nb_tx < nb_rx && retry++ < burst_tx_retry_num) {
|
|
rte_delay_us(burst_tx_delay_time);
|
|
nb_tx += rte_eth_tx_burst(fs->tx_port, fs->tx_queue,
|
|
&pkts_burst[nb_tx], nb_rx - nb_tx);
|
|
}
|
|
}
|
|
fs->tx_packets += nb_tx;
|
|
inc_tx_burst_stats(fs, nb_tx);
|
|
if (unlikely(nb_tx < nb_rx)) {
|
|
fs->fwd_dropped += (nb_rx - nb_tx);
|
|
do {
|
|
rte_pktmbuf_free(pkts_burst[nb_tx]);
|
|
} while (++nb_tx < nb_rx);
|
|
}
|
|
|
|
get_end_cycles(fs, start_tsc);
|
|
}
|
|
|
|
static void
|
|
stream_init_forward(struct fwd_stream *fs)
|
|
{
|
|
bool rx_stopped, tx_stopped;
|
|
|
|
rx_stopped = ports[fs->rx_port].rxq[fs->rx_queue].state ==
|
|
RTE_ETH_QUEUE_STATE_STOPPED;
|
|
tx_stopped = ports[fs->tx_port].txq[fs->tx_queue].state ==
|
|
RTE_ETH_QUEUE_STATE_STOPPED;
|
|
fs->disabled = rx_stopped || tx_stopped;
|
|
}
|
|
|
|
struct fwd_engine io_fwd_engine = {
|
|
.fwd_mode_name = "io",
|
|
.port_fwd_begin = NULL,
|
|
.port_fwd_end = NULL,
|
|
.stream_init = stream_init_forward,
|
|
.packet_fwd = pkt_burst_io_forward,
|
|
};
|