--- /dev/null
+/*-
+ * 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"
+
+/* Max number of fragments per packet allowed */
+#define RTE_PORT_FRAG_MAX_FRAGS_PER_PACKET 0x80
+
+#ifdef RTE_PORT_STATS_COLLECT
+
+#define RTE_PORT_RING_READER_FRAG_STATS_PKTS_IN_ADD(port, val) \
+ port->stats.n_pkts_in += val
+#define RTE_PORT_RING_READER_FRAG_STATS_PKTS_DROP_ADD(port, val) \
+ port->stats.n_pkts_drop += val
+
+#else
+
+#define RTE_PORT_RING_READER_FRAG_STATS_PKTS_IN_ADD(port, val)
+#define RTE_PORT_RING_READER_FRAG_STATS_PKTS_DROP_ADD(port, val)
+
+#endif
+
+typedef int32_t
+ (*frag_op)(struct rte_mbuf *pkt_in,
+ struct rte_mbuf **pkts_out,
+ uint16_t nb_pkts_out,
+ uint16_t mtu_size,
+ struct rte_mempool *pool_direct,
+ struct rte_mempool *pool_indirect);
+
+struct rte_port_ring_reader_frag {
+ struct rte_port_in_stats stats;
+
+ /* 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[RTE_PORT_FRAG_MAX_FRAGS_PER_PACKET];
+ uint32_t n_pkts;
+ uint32_t pos_pkts;
+ uint32_t n_frags;
+ uint32_t pos_frags;
+
+ frag_op f_frag;
+} __rte_cache_aligned;
+
+static void *
+rte_port_ring_reader_frag_create(void *params, int socket_id, int is_ipv4)
+{
+ struct rte_port_ring_reader_frag_params *conf =
+ (struct rte_port_ring_reader_frag_params *) params;
+ struct rte_port_ring_reader_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;
+
+ port->f_frag = (is_ipv4) ?
+ rte_ipv4_fragment_packet : rte_ipv6_fragment_packet;
+
+ return port;
+}
+
+static void *
+rte_port_ring_reader_ipv4_frag_create(void *params, int socket_id)
+{
+ return rte_port_ring_reader_frag_create(params, socket_id, 1);
+}
+
+static void *
+rte_port_ring_reader_ipv6_frag_create(void *params, int socket_id)
+{
+ return rte_port_ring_reader_frag_create(params, socket_id, 0);
+}
+
+static int
+rte_port_ring_reader_frag_rx(void *port,
+ struct rte_mbuf **pkts,
+ uint32_t n_pkts)
+{
+ struct rte_port_ring_reader_frag *p =
+ (struct rte_port_ring_reader_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);
+ RTE_PORT_RING_READER_FRAG_STATS_PKTS_IN_ADD(p, p->n_pkts);
+ 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 <= p->mtu) {
+ 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 = p->f_frag(
+ pkt,
+ p->frags,
+ RTE_PORT_FRAG_MAX_FRAGS_PER_PACKET,
+ p->mtu,
+ p->pool_direct,
+ p->pool_indirect
+ );
+
+ if (status < 0) {
+ rte_pktmbuf_free(pkt);
+ RTE_PORT_RING_READER_FRAG_STATS_PKTS_DROP_ADD(p, 1);
+ 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, sizeof(struct rte_mbuf));
+ uint8_t *dst =
+ RTE_MBUF_METADATA_UINT8_PTR(p->frags[i], sizeof(struct rte_mbuf));
+
+ 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_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;
+}
+
+static int
+rte_port_frag_reader_stats_read(void *port,
+ struct rte_port_in_stats *stats, int clear)
+{
+ struct rte_port_ring_reader_frag *p =
+ (struct rte_port_ring_reader_frag *) port;
+
+ if (stats != NULL)
+ memcpy(stats, &p->stats, sizeof(p->stats));
+
+ if (clear)
+ memset(&p->stats, 0, sizeof(p->stats));
+
+ 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_frag_free,
+ .f_rx = rte_port_ring_reader_frag_rx,
+ .f_stats = rte_port_frag_reader_stats_read,
+};
+
+struct rte_port_in_ops rte_port_ring_reader_ipv6_frag_ops = {
+ .f_create = rte_port_ring_reader_ipv6_frag_create,
+ .f_free = rte_port_ring_reader_frag_free,
+ .f_rx = rte_port_ring_reader_frag_rx,
+ .f_stats = rte_port_frag_reader_stats_read,
+};
Code Review / deb_dpdk.git / blobdiff