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/*-
* BSD LICENSE
*
* Copyright(c) 2010-2014 Intel Corporation. All rights reserved.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
* * Neither the name of Intel Corporation nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include <string.h>
#include <rte_mbuf.h>
#include <rte_malloc.h>
#include "rte_port_sched.h"
/*
* Reader
*/
struct rte_port_sched_reader {
struct rte_sched_port *sched;
};
static void *
rte_port_sched_reader_create(void *params, int socket_id)
{
struct rte_port_sched_reader_params *conf =
(struct rte_port_sched_reader_params *) params;
struct rte_port_sched_reader *port;
/* Check input parameters */
if ((conf == NULL) ||
(conf->sched == NULL)) {
RTE_LOG(ERR, PORT, "%s: Invalid params\n", __func__);
return NULL;
}
/* Memory allocation */
port = rte_zmalloc_socket("PORT", sizeof(*port),
RTE_CACHE_LINE_SIZE, socket_id);
if (port == NULL) {
RTE_LOG(ERR, PORT, "%s: Failed to allocate port\n", __func__);
return NULL;
}
/* Initialization */
port->sched = conf->sched;
return port;
}
static int
rte_port_sched_reader_rx(void *port, struct rte_mbuf **pkts, uint32_t n_pkts)
{
struct rte_port_sched_reader *p = (struct rte_port_sched_reader *) port;
return rte_sched_port_dequeue(p->sched, pkts, n_pkts);
}
static int
rte_port_sched_reader_free(void *port)
{
if (port == NULL) {
RTE_LOG(ERR, PORT, "%s: port is NULL\n", __func__);
return -EINVAL;
}
rte_free(port);
return 0;
}
/*
* Writer
*/
struct rte_port_sched_writer {
struct rte_mbuf *tx_buf[2 * RTE_PORT_IN_BURST_SIZE_MAX];
struct rte_sched_port *sched;
uint32_t tx_burst_sz;
uint32_t tx_buf_count;
uint64_t bsz_mask;
};
static void *
rte_port_sched_writer_create(void *params, int socket_id)
{
struct rte_port_sched_writer_params *conf =
(struct rte_port_sched_writer_params *) params;
struct rte_port_sched_writer *port;
/* Check input parameters */
if ((conf == NULL) ||
(conf->sched == NULL) ||
(conf->tx_burst_sz == 0) ||
(conf->tx_burst_sz > RTE_PORT_IN_BURST_SIZE_MAX) ||
(!rte_is_power_of_2(conf->tx_burst_sz))) {
RTE_LOG(ERR, PORT, "%s: Invalid params\n", __func__);
return NULL;
}
/* Memory allocation */
port = rte_zmalloc_socket("PORT", sizeof(*port),
RTE_CACHE_LINE_SIZE, socket_id);
if (port == NULL) {
RTE_LOG(ERR, PORT, "%s: Failed to allocate port\n", __func__);
return NULL;
}
/* Initialization */
port->sched = conf->sched;
port->tx_burst_sz = conf->tx_burst_sz;
port->tx_buf_count = 0;
port->bsz_mask = 1LLU << (conf->tx_burst_sz - 1);
return port;
}
static int
rte_port_sched_writer_tx(void *port, struct rte_mbuf *pkt)
{
struct rte_port_sched_writer *p = (struct rte_port_sched_writer *) port;
p->tx_buf[p->tx_buf_count++] = pkt;
if (p->tx_buf_count >= p->tx_burst_sz) {
rte_sched_port_enqueue(p->sched, p->tx_buf, p->tx_buf_count);
p->tx_buf_count = 0;
}
return 0;
}
static int
rte_port_sched_writer_tx_bulk(void *port,
struct rte_mbuf **pkts,
uint64_t pkts_mask)
{
struct rte_port_sched_writer *p = (struct rte_port_sched_writer *) port;
uint32_t bsz_mask = p->bsz_mask;
uint32_t tx_buf_count = p->tx_buf_count;
uint64_t expr = (pkts_mask & (pkts_mask + 1)) |
((pkts_mask & bsz_mask) ^ bsz_mask);
if (expr == 0) {
uint64_t n_pkts = __builtin_popcountll(pkts_mask);
if (tx_buf_count) {
rte_sched_port_enqueue(p->sched, p->tx_buf,
tx_buf_count);
p->tx_buf_count = 0;
}
rte_sched_port_enqueue(p->sched, pkts, n_pkts);
} else {
for ( ; pkts_mask; ) {
uint32_t pkt_index = __builtin_ctzll(pkts_mask);
uint64_t pkt_mask = 1LLU << pkt_index;
struct rte_mbuf *pkt = pkts[pkt_index];
p->tx_buf[tx_buf_count++] = pkt;
pkts_mask &= ~pkt_mask;
}
p->tx_buf_count = tx_buf_count;
if (tx_buf_count >= p->tx_burst_sz) {
rte_sched_port_enqueue(p->sched, p->tx_buf,
tx_buf_count);
p->tx_buf_count = 0;
}
}
return 0;
}
static int
rte_port_sched_writer_flush(void *port)
{
struct rte_port_sched_writer *p = (struct rte_port_sched_writer *) port;
if (p->tx_buf_count) {
rte_sched_port_enqueue(p->sched, p->tx_buf, p->tx_buf_count);
p->tx_buf_count = 0;
}
return 0;
}
static int
rte_port_sched_writer_free(void *port)
{
if (port == NULL) {
RTE_LOG(ERR, PORT, "%s: port is NULL\n", __func__);
return -EINVAL;
}
rte_port_sched_writer_flush(port);
rte_free(port);
return 0;
}
/*
* Summary of port operations
*/
struct rte_port_in_ops rte_port_sched_reader_ops = {
.f_create = rte_port_sched_reader_create,
.f_free = rte_port_sched_reader_free,
.f_rx = rte_port_sched_reader_rx,
};
struct rte_port_out_ops rte_port_sched_writer_ops = {
.f_create = rte_port_sched_writer_create,
.f_free = rte_port_sched_writer_free,
.f_tx = rte_port_sched_writer_tx,
.f_tx_bulk = rte_port_sched_writer_tx_bulk,
.f_flush = rte_port_sched_writer_flush,
};
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