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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_ether.h>
#include <rte_ip_frag.h>
#include <rte_memory.h>
#include "rte_port_frag.h"
/* Default byte size for the IPv4 Maximum Transfer Unit (MTU).
* This value includes the size of IPv4 header. */
#define IPV4_MTU_DEFAULT ETHER_MTU
/* Max number of fragments per packet allowed */
#define IPV4_MAX_FRAGS_PER_PACKET 0x80
struct rte_port_ring_reader_ipv4_frag {
/* Input parameters */
struct rte_ring *ring;
uint32_t mtu;
uint32_t metadata_size;
struct rte_mempool *pool_direct;
struct rte_mempool *pool_indirect;
/* Internal buffers */
struct rte_mbuf *pkts[RTE_PORT_IN_BURST_SIZE_MAX];
struct rte_mbuf *frags[IPV4_MAX_FRAGS_PER_PACKET];
uint32_t n_pkts;
uint32_t pos_pkts;
uint32_t n_frags;
uint32_t pos_frags;
} __rte_cache_aligned;
static void *
rte_port_ring_reader_ipv4_frag_create(void *params, int socket_id)
{
struct rte_port_ring_reader_ipv4_frag_params *conf =
(struct rte_port_ring_reader_ipv4_frag_params *) params;
struct rte_port_ring_reader_ipv4_frag *port;
/* Check input parameters */
if (conf == NULL) {
RTE_LOG(ERR, PORT, "%s: Parameter conf is NULL\n", __func__);
return NULL;
}
if (conf->ring == NULL) {
RTE_LOG(ERR, PORT, "%s: Parameter ring is NULL\n", __func__);
return NULL;
}
if (conf->mtu == 0) {
RTE_LOG(ERR, PORT, "%s: Parameter mtu is invalid\n", __func__);
return NULL;
}
if (conf->pool_direct == NULL) {
RTE_LOG(ERR, PORT, "%s: Parameter pool_direct is NULL\n",
__func__);
return NULL;
}
if (conf->pool_indirect == NULL) {
RTE_LOG(ERR, PORT, "%s: Parameter pool_indirect is NULL\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: port is NULL\n", __func__);
return NULL;
}
/* Initialization */
port->ring = conf->ring;
port->mtu = conf->mtu;
port->metadata_size = conf->metadata_size;
port->pool_direct = conf->pool_direct;
port->pool_indirect = conf->pool_indirect;
port->n_pkts = 0;
port->pos_pkts = 0;
port->n_frags = 0;
port->pos_frags = 0;
return port;
}
static int
rte_port_ring_reader_ipv4_frag_rx(void *port,
struct rte_mbuf **pkts,
uint32_t n_pkts)
{
struct rte_port_ring_reader_ipv4_frag *p =
(struct rte_port_ring_reader_ipv4_frag *) port;
uint32_t n_pkts_out;
n_pkts_out = 0;
/* Get packets from the "frag" buffer */
if (p->n_frags >= n_pkts) {
memcpy(pkts, &p->frags[p->pos_frags], n_pkts * sizeof(void *));
p->pos_frags += n_pkts;
p->n_frags -= n_pkts;
return n_pkts;
}
memcpy(pkts, &p->frags[p->pos_frags], p->n_frags * sizeof(void *));
n_pkts_out = p->n_frags;
p->n_frags = 0;
/* Look to "pkts" buffer to get more packets */
for ( ; ; ) {
struct rte_mbuf *pkt;
uint32_t n_pkts_to_provide, i;
int status;
/* If "pkts" buffer is empty, read packet burst from ring */
if (p->n_pkts == 0) {
p->n_pkts = rte_ring_sc_dequeue_burst(p->ring,
(void **) p->pkts, RTE_PORT_IN_BURST_SIZE_MAX);
if (p->n_pkts == 0)
return n_pkts_out;
p->pos_pkts = 0;
}
/* Read next packet from "pkts" buffer */
pkt = p->pkts[p->pos_pkts++];
p->n_pkts--;
/* If not jumbo, pass current packet to output */
if (pkt->pkt_len <= IPV4_MTU_DEFAULT) {
pkts[n_pkts_out++] = pkt;
n_pkts_to_provide = n_pkts - n_pkts_out;
if (n_pkts_to_provide == 0)
return n_pkts;
continue;
}
/* Fragment current packet into the "frags" buffer */
status = rte_ipv4_fragment_packet(
pkt,
p->frags,
IPV4_MAX_FRAGS_PER_PACKET,
p->mtu,
p->pool_direct,
p->pool_indirect
);
if (status < 0) {
rte_pktmbuf_free(pkt);
continue;
}
p->n_frags = (uint32_t) status;
p->pos_frags = 0;
/* Copy meta-data from input jumbo packet to its fragments */
for (i = 0; i < p->n_frags; i++) {
uint8_t *src = RTE_MBUF_METADATA_UINT8_PTR(pkt, 0);
uint8_t *dst =
RTE_MBUF_METADATA_UINT8_PTR(p->frags[i], 0);
memcpy(dst, src, p->metadata_size);
}
/* Free input jumbo packet */
rte_pktmbuf_free(pkt);
/* Get packets from "frag" buffer */
n_pkts_to_provide = n_pkts - n_pkts_out;
if (p->n_frags >= n_pkts_to_provide) {
memcpy(&pkts[n_pkts_out], p->frags,
n_pkts_to_provide * sizeof(void *));
p->n_frags -= n_pkts_to_provide;
p->pos_frags += n_pkts_to_provide;
return n_pkts;
}
memcpy(&pkts[n_pkts_out], p->frags,
p->n_frags * sizeof(void *));
n_pkts_out += p->n_frags;
p->n_frags = 0;
}
}
static int
rte_port_ring_reader_ipv4_frag_free(void *port)
{
if (port == NULL) {
RTE_LOG(ERR, PORT, "%s: Parameter port is NULL\n", __func__);
return -1;
}
rte_free(port);
return 0;
}
/*
* Summary of port operations
*/
struct rte_port_in_ops rte_port_ring_reader_ipv4_frag_ops = {
.f_create = rte_port_ring_reader_ipv4_frag_create,
.f_free = rte_port_ring_reader_ipv4_frag_free,
.f_rx = rte_port_ring_reader_ipv4_frag_rx,
};
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