--- /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_cycles.h>
+#include <rte_log.h>
+
+#include "rte_port_ras.h"
+
+#ifndef RTE_PORT_RAS_N_BUCKETS
+#define RTE_PORT_RAS_N_BUCKETS 4094
+#endif
+
+#ifndef RTE_PORT_RAS_N_ENTRIES_PER_BUCKET
+#define RTE_PORT_RAS_N_ENTRIES_PER_BUCKET 8
+#endif
+
+#ifndef RTE_PORT_RAS_N_ENTRIES
+#define RTE_PORT_RAS_N_ENTRIES (RTE_PORT_RAS_N_BUCKETS * RTE_PORT_RAS_N_ENTRIES_PER_BUCKET)
+#endif
+
+#ifdef RTE_PORT_STATS_COLLECT
+
+#define RTE_PORT_RING_WRITER_RAS_STATS_PKTS_IN_ADD(port, val) \
+ port->stats.n_pkts_in += val
+#define RTE_PORT_RING_WRITER_RAS_STATS_PKTS_DROP_ADD(port, val) \
+ port->stats.n_pkts_drop += val
+
+#else
+
+#define RTE_PORT_RING_WRITER_RAS_STATS_PKTS_IN_ADD(port, val)
+#define RTE_PORT_RING_WRITER_RAS_STATS_PKTS_DROP_ADD(port, val)
+
+#endif
+
+struct rte_port_ring_writer_ras;
+
+typedef void (*ras_op)(
+ struct rte_port_ring_writer_ras *p,
+ struct rte_mbuf *pkt);
+
+static void
+process_ipv4(struct rte_port_ring_writer_ras *p, struct rte_mbuf *pkt);
+static void
+process_ipv6(struct rte_port_ring_writer_ras *p, struct rte_mbuf *pkt);
+
+struct rte_port_ring_writer_ras {
+ struct rte_port_out_stats stats;
+
+ struct rte_mbuf *tx_buf[RTE_PORT_IN_BURST_SIZE_MAX];
+ struct rte_ring *ring;
+ uint32_t tx_burst_sz;
+ uint32_t tx_buf_count;
+ struct rte_ip_frag_tbl *frag_tbl;
+ struct rte_ip_frag_death_row death_row;
+
+ ras_op f_ras;
+};
+
+static void *
+rte_port_ring_writer_ras_create(void *params, int socket_id, int is_ipv4)
+{
+ struct rte_port_ring_writer_ras_params *conf =
+ (struct rte_port_ring_writer_ras_params *) params;
+ struct rte_port_ring_writer_ras *port;
+ uint64_t frag_cycles;
+
+ /* 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->tx_burst_sz == 0) ||
+ (conf->tx_burst_sz > RTE_PORT_IN_BURST_SIZE_MAX)) {
+ RTE_LOG(ERR, PORT, "%s: Parameter tx_burst_sz is invalid\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 socket\n", __func__);
+ return NULL;
+ }
+
+ /* Create fragmentation table */
+ frag_cycles = (rte_get_tsc_hz() + MS_PER_S - 1) / MS_PER_S * MS_PER_S;
+ frag_cycles *= 100;
+
+ port->frag_tbl = rte_ip_frag_table_create(
+ RTE_PORT_RAS_N_BUCKETS,
+ RTE_PORT_RAS_N_ENTRIES_PER_BUCKET,
+ RTE_PORT_RAS_N_ENTRIES,
+ frag_cycles,
+ socket_id);
+
+ if (port->frag_tbl == NULL) {
+ RTE_LOG(ERR, PORT, "%s: rte_ip_frag_table_create failed\n",
+ __func__);
+ rte_free(port);
+ return NULL;
+ }
+
+ /* Initialization */
+ port->ring = conf->ring;
+ port->tx_burst_sz = conf->tx_burst_sz;
+ port->tx_buf_count = 0;
+
+ port->f_ras = (is_ipv4 == 1) ? process_ipv4 : process_ipv6;
+
+ return port;
+}
+
+static void *
+rte_port_ring_writer_ipv4_ras_create(void *params, int socket_id)
+{
+ return rte_port_ring_writer_ras_create(params, socket_id, 1);
+}
+
+static void *
+rte_port_ring_writer_ipv6_ras_create(void *params, int socket_id)
+{
+ return rte_port_ring_writer_ras_create(params, socket_id, 0);
+}
+
+static inline void
+send_burst(struct rte_port_ring_writer_ras *p)
+{
+ uint32_t nb_tx;
+
+ nb_tx = rte_ring_sp_enqueue_burst(p->ring, (void **)p->tx_buf,
+ p->tx_buf_count);
+
+ RTE_PORT_RING_WRITER_RAS_STATS_PKTS_DROP_ADD(p, p->tx_buf_count - nb_tx);
+ for ( ; nb_tx < p->tx_buf_count; nb_tx++)
+ rte_pktmbuf_free(p->tx_buf[nb_tx]);
+
+ p->tx_buf_count = 0;
+}
+
+static void
+process_ipv4(struct rte_port_ring_writer_ras *p, struct rte_mbuf *pkt)
+{
+ /* Assume there is no ethernet header */
+ struct ipv4_hdr *pkt_hdr = rte_pktmbuf_mtod(pkt, struct ipv4_hdr *);
+
+ /* Get "More fragments" flag and fragment offset */
+ uint16_t frag_field = rte_be_to_cpu_16(pkt_hdr->fragment_offset);
+ uint16_t frag_offset = (uint16_t)(frag_field & IPV4_HDR_OFFSET_MASK);
+ uint16_t frag_flag = (uint16_t)(frag_field & IPV4_HDR_MF_FLAG);
+
+ /* If it is a fragmented packet, then try to reassemble */
+ if ((frag_flag == 0) && (frag_offset == 0))
+ p->tx_buf[p->tx_buf_count++] = pkt;
+ else {
+ struct rte_mbuf *mo;
+ struct rte_ip_frag_tbl *tbl = p->frag_tbl;
+ struct rte_ip_frag_death_row *dr = &p->death_row;
+
+ pkt->l3_len = sizeof(*pkt_hdr);
+
+ /* Process this fragment */
+ mo = rte_ipv4_frag_reassemble_packet(tbl, dr, pkt, rte_rdtsc(),
+ pkt_hdr);
+ if (mo != NULL)
+ p->tx_buf[p->tx_buf_count++] = mo;
+
+ rte_ip_frag_free_death_row(&p->death_row, 3);
+ }
+}
+
+static void
+process_ipv6(struct rte_port_ring_writer_ras *p, struct rte_mbuf *pkt)
+{
+ /* Assume there is no ethernet header */
+ struct ipv6_hdr *pkt_hdr = rte_pktmbuf_mtod(pkt, struct ipv6_hdr *);
+
+ struct ipv6_extension_fragment *frag_hdr;
+ uint16_t frag_data = 0;
+ frag_hdr = rte_ipv6_frag_get_ipv6_fragment_header(pkt_hdr);
+ if (frag_hdr != NULL)
+ frag_data = rte_be_to_cpu_16(frag_hdr->frag_data);
+
+ /* If it is a fragmented packet, then try to reassemble */
+ if ((frag_data & RTE_IPV6_FRAG_USED_MASK) == 0)
+ p->tx_buf[p->tx_buf_count++] = pkt;
+ else {
+ struct rte_mbuf *mo;
+ struct rte_ip_frag_tbl *tbl = p->frag_tbl;
+ struct rte_ip_frag_death_row *dr = &p->death_row;
+
+ pkt->l3_len = sizeof(*pkt_hdr) + sizeof(*frag_hdr);
+
+ /* Process this fragment */
+ mo = rte_ipv6_frag_reassemble_packet(tbl, dr, pkt, rte_rdtsc(), pkt_hdr,
+ frag_hdr);
+ if (mo != NULL)
+ p->tx_buf[p->tx_buf_count++] = mo;
+
+ rte_ip_frag_free_death_row(&p->death_row, 3);
+ }
+}
+
+static int
+rte_port_ring_writer_ras_tx(void *port, struct rte_mbuf *pkt)
+{
+ struct rte_port_ring_writer_ras *p =
+ (struct rte_port_ring_writer_ras *) port;
+
+ RTE_PORT_RING_WRITER_RAS_STATS_PKTS_IN_ADD(p, 1);
+ p->f_ras(p, pkt);
+ if (p->tx_buf_count >= p->tx_burst_sz)
+ send_burst(p);
+
+ return 0;
+}
+
+static int
+rte_port_ring_writer_ras_tx_bulk(void *port,
+ struct rte_mbuf **pkts,
+ uint64_t pkts_mask)
+{
+ struct rte_port_ring_writer_ras *p =
+ (struct rte_port_ring_writer_ras *) port;
+
+ if ((pkts_mask & (pkts_mask + 1)) == 0) {
+ uint64_t n_pkts = __builtin_popcountll(pkts_mask);
+ uint32_t i;
+
+ for (i = 0; i < n_pkts; i++) {
+ struct rte_mbuf *pkt = pkts[i];
+
+ RTE_PORT_RING_WRITER_RAS_STATS_PKTS_IN_ADD(p, 1);
+ p->f_ras(p, pkt);
+ if (p->tx_buf_count >= p->tx_burst_sz)
+ send_burst(p);
+ }
+ } 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];
+
+ RTE_PORT_RING_WRITER_RAS_STATS_PKTS_IN_ADD(p, 1);
+ p->f_ras(p, pkt);
+ if (p->tx_buf_count >= p->tx_burst_sz)
+ send_burst(p);
+
+ pkts_mask &= ~pkt_mask;
+ }
+ }
+
+ return 0;
+}
+
+static int
+rte_port_ring_writer_ras_flush(void *port)
+{
+ struct rte_port_ring_writer_ras *p =
+ (struct rte_port_ring_writer_ras *) port;
+
+ if (p->tx_buf_count > 0)
+ send_burst(p);
+
+ return 0;
+}
+
+static int
+rte_port_ring_writer_ras_free(void *port)
+{
+ struct rte_port_ring_writer_ras *p =
+ (struct rte_port_ring_writer_ras *) port;
+
+ if (port == NULL) {
+ RTE_LOG(ERR, PORT, "%s: Parameter port is NULL\n", __func__);
+ return -1;
+ }
+
+ rte_port_ring_writer_ras_flush(port);
+ rte_ip_frag_table_destroy(p->frag_tbl);
+ rte_free(port);
+
+ return 0;
+}
+
+static int
+rte_port_ras_writer_stats_read(void *port,
+ struct rte_port_out_stats *stats, int clear)
+{
+ struct rte_port_ring_writer_ras *p =
+ (struct rte_port_ring_writer_ras *) 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_out_ops rte_port_ring_writer_ipv4_ras_ops = {
+ .f_create = rte_port_ring_writer_ipv4_ras_create,
+ .f_free = rte_port_ring_writer_ras_free,
+ .f_tx = rte_port_ring_writer_ras_tx,
+ .f_tx_bulk = rte_port_ring_writer_ras_tx_bulk,
+ .f_flush = rte_port_ring_writer_ras_flush,
+ .f_stats = rte_port_ras_writer_stats_read,
+};
+
+struct rte_port_out_ops rte_port_ring_writer_ipv6_ras_ops = {
+ .f_create = rte_port_ring_writer_ipv6_ras_create,
+ .f_free = rte_port_ring_writer_ras_free,
+ .f_tx = rte_port_ring_writer_ras_tx,
+ .f_tx_bulk = rte_port_ring_writer_ras_tx_bulk,
+ .f_flush = rte_port_ring_writer_ras_flush,
+ .f_stats = rte_port_ras_writer_stats_read,
+};
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