Imported Upstream version 16.04

Change-Id: I77eadcd8538a9122e4773cbe55b24033dc451757
Signed-off-by: C.J. Collier <cjcollier@linuxfoundation.org>

1 files changed, 372 insertions, 0 deletions

diff --git a/examples/quota_watermark/qw/main.c b/examples/quota_watermark/qw/main.c
new file mode 100644
index 00000000..8ed02148
--- /dev/null
+++ b/examples/quota_watermark/qw/main.c
@@ -0,0 +1,372 @@
+/*-
+ *   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 <rte_eal.h>
+
+#include <rte_common.h>
+#include <rte_debug.h>
+#include <rte_errno.h>
+#include <rte_ethdev.h>
+#include <rte_launch.h>
+#include <rte_lcore.h>
+#include <rte_log.h>
+#include <rte_mbuf.h>
+#include <rte_ring.h>
+
+#include <rte_byteorder.h>
+
+#include "args.h"
+#include "main.h"
+#include "init.h"
+#include "../include/conf.h"
+
+
+#ifdef QW_SOFTWARE_FC
+#define SEND_PAUSE_FRAME(port_id, duration) send_pause_frame(port_id, duration)
+#else
+#define SEND_PAUSE_FRAME(port_id, duration) do { } while(0)
+#endif
+
+#define ETHER_TYPE_FLOW_CONTROL 0x8808
+
+struct ether_fc_frame {
+    uint16_t opcode;
+    uint16_t param;
+} __attribute__((__packed__));
+
+
+int *quota;
+unsigned int *low_watermark;
+
+uint8_t port_pairs[RTE_MAX_ETHPORTS];
+
+struct rte_ring *rings[RTE_MAX_LCORE][RTE_MAX_ETHPORTS];
+struct rte_mempool *mbuf_pool;
+
+
+static void send_pause_frame(uint8_t port_id, uint16_t duration)
+{
+    struct rte_mbuf *mbuf;
+    struct ether_fc_frame *pause_frame;
+    struct ether_hdr *hdr;
+    struct ether_addr mac_addr;
+
+    RTE_LOG(DEBUG, USER1, "Sending PAUSE frame (duration=%d) on port %d\n",
+            duration, port_id);
+
+    /* Get a mbuf from the pool */
+    mbuf = rte_pktmbuf_alloc(mbuf_pool);
+    if (unlikely(mbuf == NULL))
+        return;
+
+    /* Prepare a PAUSE frame */
+    hdr = rte_pktmbuf_mtod(mbuf, struct ether_hdr *);
+    pause_frame = (struct ether_fc_frame *) &hdr[1];
+
+    rte_eth_macaddr_get(port_id, &mac_addr);
+    ether_addr_copy(&mac_addr, &hdr->s_addr);
+
+    void *tmp = &hdr->d_addr.addr_bytes[0];
+    *((uint64_t *)tmp) = 0x010000C28001ULL;
+
+    hdr->ether_type = rte_cpu_to_be_16(ETHER_TYPE_FLOW_CONTROL);
+
+    pause_frame->opcode = rte_cpu_to_be_16(0x0001);
+    pause_frame->param  = rte_cpu_to_be_16(duration);
+
+    mbuf->pkt_len  = 60;
+    mbuf->data_len = 60;
+
+    rte_eth_tx_burst(port_id, 0, &mbuf, 1);
+}
+
+/**
+ * Get the previous enabled lcore ID
+ *
+ * @param lcore_id
+ *   The current lcore ID.
+ * @return
+ *   The previous enabled lcore_id or -1 if not found.
+ */
+static unsigned int
+get_previous_lcore_id(unsigned int lcore_id)
+{
+    int i;
+
+    for (i = lcore_id - 1; i >= 0; i--)
+        if (rte_lcore_is_enabled(i))
+            return i;
+
+    return -1;
+}
+
+/**
+ * Get the last enabled lcore ID
+ *
+ * @return
+ *   The last enabled lcore_id.
+ */
+static unsigned int
+get_last_lcore_id(void)
+{
+    int i;
+
+    for (i = RTE_MAX_LCORE; i >= 0; i--)
+        if (rte_lcore_is_enabled(i))
+            return i;
+
+    return 0;
+}
+
+static void
+receive_stage(__attribute__((unused)) void *args)
+{
+    int i, ret;
+
+    uint8_t port_id;
+    uint16_t nb_rx_pkts;
+
+    unsigned int lcore_id;
+
+    struct rte_mbuf *pkts[MAX_PKT_QUOTA];
+    struct rte_ring *ring;
+    enum ring_state ring_state[RTE_MAX_ETHPORTS] = { RING_READY };
+
+    lcore_id = rte_lcore_id();
+
+    RTE_LOG(INFO, USER1,
+            "%s() started on core %u\n", __func__, lcore_id);
+
+    while (1) {
+
+        /* Process each port round robin style */
+        for (port_id = 0; port_id < RTE_MAX_ETHPORTS; port_id++) {
+
+            if (!is_bit_set(port_id, portmask))
+                continue;
+
+            ring = rings[lcore_id][port_id];
+
+            if (ring_state[port_id] != RING_READY) {
+                if (rte_ring_count(ring) > *low_watermark)
+                    continue;
+                else
+                    ring_state[port_id] = RING_READY;
+            }
+
+            /* Enqueue received packets on the RX ring */
+            nb_rx_pkts = rte_eth_rx_burst(port_id, 0, pkts, (uint16_t) *quota);
+            ret = rte_ring_enqueue_bulk(ring, (void *) pkts, nb_rx_pkts);
+            if (ret == -EDQUOT) {
+                ring_state[port_id] = RING_OVERLOADED;
+                send_pause_frame(port_id, 1337);
+            }
+
+            else if (ret == -ENOBUFS) {
+
+                /* Return  mbufs to the pool, effectively dropping packets */
+                for (i = 0; i < nb_rx_pkts; i++)
+                    rte_pktmbuf_free(pkts[i]);
+            }
+        }
+    }
+}
+
+static void
+pipeline_stage(__attribute__((unused)) void *args)
+{
+    int i, ret;
+    int nb_dq_pkts;
+
+    uint8_t port_id;
+
+    unsigned int lcore_id, previous_lcore_id;
+
+    void *pkts[MAX_PKT_QUOTA];
+    struct rte_ring *rx, *tx;
+    enum ring_state ring_state[RTE_MAX_ETHPORTS] = { RING_READY };
+
+    lcore_id = rte_lcore_id();
+    previous_lcore_id = get_previous_lcore_id(lcore_id);
+
+    RTE_LOG(INFO, USER1,
+            "%s() started on core %u - processing packets from core %u\n",
+            __func__, lcore_id, previous_lcore_id);
+
+    while (1) {
+
+        for (port_id = 0; port_id < RTE_MAX_ETHPORTS; port_id++) {
+
+            if (!is_bit_set(port_id, portmask))
+                continue;
+
+            tx = rings[lcore_id][port_id];
+            rx = rings[previous_lcore_id][port_id];
+
+            if (ring_state[port_id] != RING_READY) {
+                if (rte_ring_count(tx) > *low_watermark)
+                    continue;
+                else
+                    ring_state[port_id] = RING_READY;
+            }
+
+            /* Dequeue up to quota mbuf from rx */
+            nb_dq_pkts = rte_ring_dequeue_burst(rx, pkts, *quota);
+            if (unlikely(nb_dq_pkts < 0))
+                continue;
+
+            /* Enqueue them on tx */
+            ret = rte_ring_enqueue_bulk(tx, pkts, nb_dq_pkts);
+            if (ret == -EDQUOT)
+                ring_state[port_id] = RING_OVERLOADED;
+
+            else if (ret == -ENOBUFS) {
+
+                /* Return  mbufs to the pool, effectively dropping packets */
+                for (i = 0; i < nb_dq_pkts; i++)
+                    rte_pktmbuf_free(pkts[i]);
+            }
+        }
+    }
+}
+
+static void
+send_stage(__attribute__((unused)) void *args)
+{
+	uint16_t nb_dq_pkts;
+
+    uint8_t port_id;
+    uint8_t dest_port_id;
+
+    unsigned int lcore_id, previous_lcore_id;
+
+    struct rte_ring *tx;
+    struct rte_mbuf *tx_pkts[MAX_PKT_QUOTA];
+
+    lcore_id = rte_lcore_id();
+    previous_lcore_id = get_previous_lcore_id(lcore_id);
+
+    RTE_LOG(INFO, USER1,
+            "%s() started on core %u - processing packets from core %u\n",
+            __func__, lcore_id, previous_lcore_id);
+
+    while (1) {
+
+        /* Process each ring round robin style */
+        for (port_id = 0; port_id < RTE_MAX_ETHPORTS; port_id++) {
+
+            if (!is_bit_set(port_id, portmask))
+                continue;
+
+            dest_port_id = port_pairs[port_id];
+            tx = rings[previous_lcore_id][port_id];
+
+            if (rte_ring_empty(tx))
+                continue;
+
+            /* Dequeue packets from tx and send them */
+            nb_dq_pkts = (uint16_t) rte_ring_dequeue_burst(tx, (void *) tx_pkts, *quota);
+            rte_eth_tx_burst(dest_port_id, 0, tx_pkts, nb_dq_pkts);
+
+            /* TODO: Check if nb_dq_pkts == nb_tx_pkts? */
+        }
+    }
+}
+
+int
+main(int argc, char **argv)
+{
+    int ret;
+    unsigned int lcore_id, master_lcore_id, last_lcore_id;
+
+    uint8_t port_id;
+
+    rte_set_log_level(RTE_LOG_INFO);
+
+    ret = rte_eal_init(argc, argv);
+    if (ret < 0)
+        rte_exit(EXIT_FAILURE, "Cannot initialize EAL\n");
+
+    argc -= ret;
+    argv += ret;
+
+    init_dpdk();
+    setup_shared_variables();
+
+    *quota = 32;
+    *low_watermark = 60 * RING_SIZE / 100;
+
+    last_lcore_id   = get_last_lcore_id();
+    master_lcore_id = rte_get_master_lcore();
+
+    /* Parse the application's arguments */
+    ret = parse_qw_args(argc, argv);
+    if (ret < 0)
+        rte_exit(EXIT_FAILURE, "Invalid quota/watermark argument(s)\n");
+
+    /* Create a pool of mbuf to store packets */
+    mbuf_pool = rte_pktmbuf_pool_create("mbuf_pool", MBUF_PER_POOL, 32, 0,
+	    MBUF_DATA_SIZE, rte_socket_id());
+    if (mbuf_pool == NULL)
+        rte_panic("%s\n", rte_strerror(rte_errno));
+
+    for (port_id = 0; port_id < RTE_MAX_ETHPORTS; port_id++)
+        if (is_bit_set(port_id, portmask)) {
+            configure_eth_port(port_id);
+            init_ring(master_lcore_id, port_id);
+        }
+
+    pair_ports();
+
+    /* Start pipeline_connect() on all the available slave lcore but the last */
+    for (lcore_id = 0 ; lcore_id < last_lcore_id; lcore_id++) {
+        if (rte_lcore_is_enabled(lcore_id) && lcore_id != master_lcore_id) {
+
+            for (port_id = 0; port_id < RTE_MAX_ETHPORTS; port_id++)
+                if (is_bit_set(port_id, portmask))
+                    init_ring(lcore_id, port_id);
+
+            /* typecast is a workaround for GCC 4.3 bug */
+            rte_eal_remote_launch((int (*)(void *))pipeline_stage, NULL, lcore_id);
+        }
+    }
+
+    /* Start send_stage() on the last slave core */
+    /* typecast is a workaround for GCC 4.3 bug */
+    rte_eal_remote_launch((int (*)(void *))send_stage, NULL, last_lcore_id);
+
+    /* Start receive_stage() on the master core */
+    receive_stage(NULL);
+
+    return 0;
+}