examples/qos_sched/app_thread.c

   1 /* SPDX-License-Identifier: BSD-3-Clause
   2  * Copyright(c) 2010-2014 Intel Corporation
   3  */
   4
   5 #include <stdint.h>
   6
   7 #include <rte_log.h>
   8 #include <rte_mbuf.h>
   9 #include <rte_malloc.h>
  10 #include <rte_cycles.h>
  11 #include <rte_ethdev.h>
  12 #include <rte_memcpy.h>
  13 #include <rte_byteorder.h>
  14 #include <rte_branch_prediction.h>
  15 #include <rte_sched.h>
  16
  17 #include "main.h"
  18
  19 /*
  20  * QoS parameters are encoded as follows:
  21  *              Outer VLAN ID defines subport
  22  *              Inner VLAN ID defines pipe
  23  *              Destination IP 0.0.XXX.0 defines traffic class
  24  *              Destination IP host (0.0.0.XXX) defines queue
  25  * Values below define offset to each field from start of frame
  26  */
  27 #define SUBPORT_OFFSET  7
  28 #define PIPE_OFFSET             9
  29 #define TC_OFFSET               20
  30 #define QUEUE_OFFSET    20
  31 #define COLOR_OFFSET    19
  32
  33 static inline int
  34 get_pkt_sched(struct rte_mbuf *m, uint32_t *subport, uint32_t *pipe,
  35                         uint32_t *traffic_class, uint32_t *queue, uint32_t *color)
  36 {
  37         uint16_t *pdata = rte_pktmbuf_mtod(m, uint16_t *);
  38
  39         *subport = (rte_be_to_cpu_16(pdata[SUBPORT_OFFSET]) & 0x0FFF) &
  40                         (port_params.n_subports_per_port - 1); /* Outer VLAN ID*/
  41         *pipe = (rte_be_to_cpu_16(pdata[PIPE_OFFSET]) & 0x0FFF) &
  42                         (port_params.n_pipes_per_subport - 1); /* Inner VLAN ID */
  43         *traffic_class = (pdata[QUEUE_OFFSET] & 0x0F) &
  44                         (RTE_SCHED_TRAFFIC_CLASSES_PER_PIPE - 1); /* Destination IP */
  45         *queue = ((pdata[QUEUE_OFFSET] >> 8) & 0x0F) &
  46                         (RTE_SCHED_QUEUES_PER_TRAFFIC_CLASS - 1) ; /* Destination IP */
  47         *color = pdata[COLOR_OFFSET] & 0x03;    /* Destination IP */
  48
  49         return 0;
  50 }
  51
  52 void
  53 app_rx_thread(struct thread_conf **confs)
  54 {
  55         uint32_t i, nb_rx;
  56         struct rte_mbuf *rx_mbufs[burst_conf.rx_burst] __rte_cache_aligned;
  57         struct thread_conf *conf;
  58         int conf_idx = 0;
  59
  60         uint32_t subport;
  61         uint32_t pipe;
  62         uint32_t traffic_class;
  63         uint32_t queue;
  64         uint32_t color;
  65
  66         while ((conf = confs[conf_idx])) {
  67                 nb_rx = rte_eth_rx_burst(conf->rx_port, conf->rx_queue, rx_mbufs,
  68                                 burst_conf.rx_burst);
  69
  70                 if (likely(nb_rx != 0)) {
  71                         APP_STATS_ADD(conf->stat.nb_rx, nb_rx);
  72
  73                         for(i = 0; i < nb_rx; i++) {
  74                                 get_pkt_sched(rx_mbufs[i],
  75                                                 &subport, &pipe, &traffic_class, &queue, &color);
  76                                 rte_sched_port_pkt_write(conf->sched_port,
  77                                                 rx_mbufs[i],
  78                                                 subport, pipe,
  79                                                 traffic_class, queue,
  80                                                 (enum rte_color) color);
  81                         }
  82
  83                         if (unlikely(rte_ring_sp_enqueue_bulk(conf->rx_ring,
  84                                         (void **)rx_mbufs, nb_rx, NULL) == 0)) {
  85                                 for(i = 0; i < nb_rx; i++) {
  86                                         rte_pktmbuf_free(rx_mbufs[i]);
  87
  88                                         APP_STATS_ADD(conf->stat.nb_drop, 1);
  89                                 }
  90                         }
  91                 }
  92                 conf_idx++;
  93                 if (confs[conf_idx] == NULL)
  94                         conf_idx = 0;
  95         }
  96 }
  97
  98
  99
 100 /* Send the packet to an output interface
 101  * For performance reason function returns number of packets dropped, not sent,
 102  * so 0 means that all packets were sent successfully
 103  */
 104
 105 static inline void
 106 app_send_burst(struct thread_conf *qconf)
 107 {
 108         struct rte_mbuf **mbufs;
 109         uint32_t n, ret;
 110
 111         mbufs = (struct rte_mbuf **)qconf->m_table;
 112         n = qconf->n_mbufs;
 113
 114         do {
 115                 ret = rte_eth_tx_burst(qconf->tx_port, qconf->tx_queue, mbufs, (uint16_t)n);
 116                 /* we cannot drop the packets, so re-send */
 117                 /* update number of packets to be sent */
 118                 n -= ret;
 119                 mbufs = (struct rte_mbuf **)&mbufs[ret];
 120         } while (n);
 121 }
 122
 123
 124 /* Send the packet to an output interface */
 125 static void
 126 app_send_packets(struct thread_conf *qconf, struct rte_mbuf **mbufs, uint32_t nb_pkt)
 127 {
 128         uint32_t i, len;
 129
 130         len = qconf->n_mbufs;
 131         for(i = 0; i < nb_pkt; i++) {
 132                 qconf->m_table[len] = mbufs[i];
 133                 len++;
 134                 /* enough pkts to be sent */
 135                 if (unlikely(len == burst_conf.tx_burst)) {
 136                         qconf->n_mbufs = len;
 137                         app_send_burst(qconf);
 138                         len = 0;
 139                 }
 140         }
 141
 142         qconf->n_mbufs = len;
 143 }
 144
 145 void
 146 app_tx_thread(struct thread_conf **confs)
 147 {
 148         struct rte_mbuf *mbufs[burst_conf.qos_dequeue];
 149         struct thread_conf *conf;
 150         int conf_idx = 0;
 151         int retval;
 152         const uint64_t drain_tsc = (rte_get_tsc_hz() + US_PER_S - 1) / US_PER_S * BURST_TX_DRAIN_US;
 153
 154         while ((conf = confs[conf_idx])) {
 155                 retval = rte_ring_sc_dequeue_bulk(conf->tx_ring, (void **)mbufs,
 156                                         burst_conf.qos_dequeue, NULL);
 157                 if (likely(retval != 0)) {
 158                         app_send_packets(conf, mbufs, burst_conf.qos_dequeue);
 159
 160                         conf->counter = 0; /* reset empty read loop counter */
 161                 }
 162
 163                 conf->counter++;
 164
 165                 /* drain ring and TX queues */
 166                 if (unlikely(conf->counter > drain_tsc)) {
 167                         /* now check is there any packets left to be transmitted */
 168                         if (conf->n_mbufs != 0) {
 169                                 app_send_burst(conf);
 170
 171                                 conf->n_mbufs = 0;
 172                         }
 173                         conf->counter = 0;
 174                 }
 175
 176                 conf_idx++;
 177                 if (confs[conf_idx] == NULL)
 178                         conf_idx = 0;
 179         }
 180 }
 181
 182
 183 void
 184 app_worker_thread(struct thread_conf **confs)
 185 {
 186         struct rte_mbuf *mbufs[burst_conf.ring_burst];
 187         struct thread_conf *conf;
 188         int conf_idx = 0;
 189
 190         while ((conf = confs[conf_idx])) {
 191                 uint32_t nb_pkt;
 192
 193                 /* Read packet from the ring */
 194                 nb_pkt = rte_ring_sc_dequeue_burst(conf->rx_ring, (void **)mbufs,
 195                                         burst_conf.ring_burst, NULL);
 196                 if (likely(nb_pkt)) {
 197                         int nb_sent = rte_sched_port_enqueue(conf->sched_port, mbufs,
 198                                         nb_pkt);
 199
 200                         APP_STATS_ADD(conf->stat.nb_drop, nb_pkt - nb_sent);
 201                         APP_STATS_ADD(conf->stat.nb_rx, nb_pkt);
 202                 }
 203
 204                 nb_pkt = rte_sched_port_dequeue(conf->sched_port, mbufs,
 205                                         burst_conf.qos_dequeue);
 206                 if (likely(nb_pkt > 0))
 207                         while (rte_ring_sp_enqueue_bulk(conf->tx_ring,
 208                                         (void **)mbufs, nb_pkt, NULL) == 0)
 209                                 ; /* empty body */
 210
 211                 conf_idx++;
 212                 if (confs[conf_idx] == NULL)
 213                         conf_idx = 0;
 214         }
 215 }
 216
 217
 218 void
 219 app_mixed_thread(struct thread_conf **confs)
 220 {
 221         struct rte_mbuf *mbufs[burst_conf.ring_burst];
 222         struct thread_conf *conf;
 223         int conf_idx = 0;
 224         const uint64_t drain_tsc = (rte_get_tsc_hz() + US_PER_S - 1) / US_PER_S * BURST_TX_DRAIN_US;
 225
 226         while ((conf = confs[conf_idx])) {
 227                 uint32_t nb_pkt;
 228
 229                 /* Read packet from the ring */
 230                 nb_pkt = rte_ring_sc_dequeue_burst(conf->rx_ring, (void **)mbufs,
 231                                         burst_conf.ring_burst, NULL);
 232                 if (likely(nb_pkt)) {
 233                         int nb_sent = rte_sched_port_enqueue(conf->sched_port, mbufs,
 234                                         nb_pkt);
 235
 236                         APP_STATS_ADD(conf->stat.nb_drop, nb_pkt - nb_sent);
 237                         APP_STATS_ADD(conf->stat.nb_rx, nb_pkt);
 238                 }
 239
 240
 241                 nb_pkt = rte_sched_port_dequeue(conf->sched_port, mbufs,
 242                                         burst_conf.qos_dequeue);
 243                 if (likely(nb_pkt > 0)) {
 244                         app_send_packets(conf, mbufs, nb_pkt);
 245
 246                         conf->counter = 0; /* reset empty read loop counter */
 247                 }
 248
 249                 conf->counter++;
 250
 251                 /* drain ring and TX queues */
 252                 if (unlikely(conf->counter > drain_tsc)) {
 253
 254                         /* now check is there any packets left to be transmitted */
 255                         if (conf->n_mbufs != 0) {
 256                                 app_send_burst(conf);
 257
 258                                 conf->n_mbufs = 0;
 259                         }
 260                         conf->counter = 0;
 261                 }
 262
 263                 conf_idx++;
 264                 if (confs[conf_idx] == NULL)
 265                         conf_idx = 0;
 266         }
 267 }