ceph/src/dpdk/lib/librte_port/rte_port_sched.c

   1 /*-
   2  *   BSD LICENSE
   3  *
   4  *   Copyright(c) 2010-2014 Intel Corporation. All rights reserved.
   5  *   All rights reserved.
   6  *
   7  *   Redistribution and use in source and binary forms, with or without
   8  *   modification, are permitted provided that the following conditions
   9  *   are met:
  10  *
  11  *     * Redistributions of source code must retain the above copyright
  12  *       notice, this list of conditions and the following disclaimer.
  13  *     * Redistributions in binary form must reproduce the above copyright
  14  *       notice, this list of conditions and the following disclaimer in
  15  *       the documentation and/or other materials provided with the
  16  *       distribution.
  17  *     * Neither the name of Intel Corporation nor the names of its
  18  *       contributors may be used to endorse or promote products derived
  19  *       from this software without specific prior written permission.
  20  *
  21  *   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  22  *   "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  23  *   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  24  *   A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  25  *   OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  26  *   SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  27  *   LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  28  *   DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  29  *   THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  30  *   (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  31  *   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  32  */
  33 #include <string.h>
  34
  35 #include <rte_mbuf.h>
  36 #include <rte_malloc.h>
  37
  38 #include "rte_port_sched.h"
  39
  40 /*
  41  * Reader
  42  */
  43 #ifdef RTE_PORT_STATS_COLLECT
  44
  45 #define RTE_PORT_SCHED_READER_PKTS_IN_ADD(port, val) \
  46         port->stats.n_pkts_in += val
  47 #define RTE_PORT_SCHED_READER_PKTS_DROP_ADD(port, val) \
  48         port->stats.n_pkts_drop += val
  49
  50 #else
  51
  52 #define RTE_PORT_SCHED_READER_PKTS_IN_ADD(port, val)
  53 #define RTE_PORT_SCHED_READER_PKTS_DROP_ADD(port, val)
  54
  55 #endif
  56
  57 struct rte_port_sched_reader {
  58         struct rte_port_in_stats stats;
  59
  60         struct rte_sched_port *sched;
  61 };
  62
  63 static void *
  64 rte_port_sched_reader_create(void *params, int socket_id)
  65 {
  66         struct rte_port_sched_reader_params *conf =
  67                         (struct rte_port_sched_reader_params *) params;
  68         struct rte_port_sched_reader *port;
  69
  70         /* Check input parameters */
  71         if ((conf == NULL) ||
  72             (conf->sched == NULL)) {
  73                 RTE_LOG(ERR, PORT, "%s: Invalid params\n", __func__);
  74                 return NULL;
  75         }
  76
  77         /* Memory allocation */
  78         port = rte_zmalloc_socket("PORT", sizeof(*port),
  79                         RTE_CACHE_LINE_SIZE, socket_id);
  80         if (port == NULL) {
  81                 RTE_LOG(ERR, PORT, "%s: Failed to allocate port\n", __func__);
  82                 return NULL;
  83         }
  84
  85         /* Initialization */
  86         port->sched = conf->sched;
  87
  88         return port;
  89 }
  90
  91 static int
  92 rte_port_sched_reader_rx(void *port, struct rte_mbuf **pkts, uint32_t n_pkts)
  93 {
  94         struct rte_port_sched_reader *p = (struct rte_port_sched_reader *) port;
  95         uint32_t nb_rx;
  96
  97         nb_rx = rte_sched_port_dequeue(p->sched, pkts, n_pkts);
  98         RTE_PORT_SCHED_READER_PKTS_IN_ADD(p, nb_rx);
  99
 100         return nb_rx;
 101 }
 102
 103 static int
 104 rte_port_sched_reader_free(void *port)
 105 {
 106         if (port == NULL) {
 107                 RTE_LOG(ERR, PORT, "%s: port is NULL\n", __func__);
 108                 return -EINVAL;
 109         }
 110
 111         rte_free(port);
 112
 113         return 0;
 114 }
 115
 116 static int
 117 rte_port_sched_reader_stats_read(void *port,
 118                 struct rte_port_in_stats *stats, int clear)
 119 {
 120         struct rte_port_sched_reader *p =
 121                 (struct rte_port_sched_reader *) port;
 122
 123         if (stats != NULL)
 124                 memcpy(stats, &p->stats, sizeof(p->stats));
 125
 126         if (clear)
 127                 memset(&p->stats, 0, sizeof(p->stats));
 128
 129         return 0;
 130 }
 131
 132 /*
 133  * Writer
 134  */
 135 #ifdef RTE_PORT_STATS_COLLECT
 136
 137 #define RTE_PORT_SCHED_WRITER_STATS_PKTS_IN_ADD(port, val) \
 138         port->stats.n_pkts_in += val
 139 #define RTE_PORT_SCHED_WRITER_STATS_PKTS_DROP_ADD(port, val) \
 140         port->stats.n_pkts_drop += val
 141
 142 #else
 143
 144 #define RTE_PORT_SCHED_WRITER_STATS_PKTS_IN_ADD(port, val)
 145 #define RTE_PORT_SCHED_WRITER_STATS_PKTS_DROP_ADD(port, val)
 146
 147 #endif
 148
 149 struct rte_port_sched_writer {
 150         struct rte_port_out_stats stats;
 151
 152         struct rte_mbuf *tx_buf[2 * RTE_PORT_IN_BURST_SIZE_MAX];
 153         struct rte_sched_port *sched;
 154         uint32_t tx_burst_sz;
 155         uint32_t tx_buf_count;
 156         uint64_t bsz_mask;
 157 };
 158
 159 static void *
 160 rte_port_sched_writer_create(void *params, int socket_id)
 161 {
 162         struct rte_port_sched_writer_params *conf =
 163                         (struct rte_port_sched_writer_params *) params;
 164         struct rte_port_sched_writer *port;
 165
 166         /* Check input parameters */
 167         if ((conf == NULL) ||
 168             (conf->sched == NULL) ||
 169             (conf->tx_burst_sz == 0) ||
 170             (conf->tx_burst_sz > RTE_PORT_IN_BURST_SIZE_MAX) ||
 171                 (!rte_is_power_of_2(conf->tx_burst_sz))) {
 172                 RTE_LOG(ERR, PORT, "%s: Invalid params\n", __func__);
 173                 return NULL;
 174         }
 175
 176         /* Memory allocation */
 177         port = rte_zmalloc_socket("PORT", sizeof(*port),
 178                         RTE_CACHE_LINE_SIZE, socket_id);
 179         if (port == NULL) {
 180                 RTE_LOG(ERR, PORT, "%s: Failed to allocate port\n", __func__);
 181                 return NULL;
 182         }
 183
 184         /* Initialization */
 185         port->sched = conf->sched;
 186         port->tx_burst_sz = conf->tx_burst_sz;
 187         port->tx_buf_count = 0;
 188         port->bsz_mask = 1LLU << (conf->tx_burst_sz - 1);
 189
 190         return port;
 191 }
 192
 193 static int
 194 rte_port_sched_writer_tx(void *port, struct rte_mbuf *pkt)
 195 {
 196         struct rte_port_sched_writer *p = (struct rte_port_sched_writer *) port;
 197
 198         p->tx_buf[p->tx_buf_count++] = pkt;
 199         RTE_PORT_SCHED_WRITER_STATS_PKTS_IN_ADD(p, 1);
 200         if (p->tx_buf_count >= p->tx_burst_sz) {
 201                 __rte_unused uint32_t nb_tx;
 202
 203                 nb_tx = rte_sched_port_enqueue(p->sched, p->tx_buf, p->tx_buf_count);
 204                 RTE_PORT_SCHED_WRITER_STATS_PKTS_DROP_ADD(p, p->tx_buf_count - nb_tx);
 205                 p->tx_buf_count = 0;
 206         }
 207
 208         return 0;
 209 }
 210
 211 static int
 212 rte_port_sched_writer_tx_bulk(void *port,
 213                 struct rte_mbuf **pkts,
 214                 uint64_t pkts_mask)
 215 {
 216         struct rte_port_sched_writer *p = (struct rte_port_sched_writer *) port;
 217         uint64_t bsz_mask = p->bsz_mask;
 218         uint32_t tx_buf_count = p->tx_buf_count;
 219         uint64_t expr = (pkts_mask & (pkts_mask + 1)) |
 220                         ((pkts_mask & bsz_mask) ^ bsz_mask);
 221
 222         if (expr == 0) {
 223                 __rte_unused uint32_t nb_tx;
 224                 uint64_t n_pkts = __builtin_popcountll(pkts_mask);
 225
 226                 if (tx_buf_count) {
 227                         nb_tx = rte_sched_port_enqueue(p->sched, p->tx_buf,
 228                                 tx_buf_count);
 229                         RTE_PORT_SCHED_WRITER_STATS_PKTS_DROP_ADD(p, tx_buf_count - nb_tx);
 230                         p->tx_buf_count = 0;
 231                 }
 232
 233                 nb_tx = rte_sched_port_enqueue(p->sched, pkts, n_pkts);
 234                 RTE_PORT_SCHED_WRITER_STATS_PKTS_DROP_ADD(p, n_pkts - nb_tx);
 235         } else {
 236                 for ( ; pkts_mask; ) {
 237                         uint32_t pkt_index = __builtin_ctzll(pkts_mask);
 238                         uint64_t pkt_mask = 1LLU << pkt_index;
 239                         struct rte_mbuf *pkt = pkts[pkt_index];
 240
 241                         p->tx_buf[tx_buf_count++] = pkt;
 242                         RTE_PORT_SCHED_WRITER_STATS_PKTS_IN_ADD(p, 1);
 243                         pkts_mask &= ~pkt_mask;
 244                 }
 245                 p->tx_buf_count = tx_buf_count;
 246
 247                 if (tx_buf_count >= p->tx_burst_sz) {
 248                         __rte_unused uint32_t nb_tx;
 249
 250                         nb_tx = rte_sched_port_enqueue(p->sched, p->tx_buf,
 251                                 tx_buf_count);
 252                         RTE_PORT_SCHED_WRITER_STATS_PKTS_DROP_ADD(p, tx_buf_count - nb_tx);
 253                         p->tx_buf_count = 0;
 254                 }
 255         }
 256
 257         return 0;
 258 }
 259
 260 static int
 261 rte_port_sched_writer_flush(void *port)
 262 {
 263         struct rte_port_sched_writer *p = (struct rte_port_sched_writer *) port;
 264
 265         if (p->tx_buf_count) {
 266                 __rte_unused uint32_t nb_tx;
 267
 268                 nb_tx = rte_sched_port_enqueue(p->sched, p->tx_buf, p->tx_buf_count);
 269                 RTE_PORT_SCHED_WRITER_STATS_PKTS_DROP_ADD(p, p->tx_buf_count - nb_tx);
 270                 p->tx_buf_count = 0;
 271         }
 272
 273         return 0;
 274 }
 275
 276 static int
 277 rte_port_sched_writer_free(void *port)
 278 {
 279         if (port == NULL) {
 280                 RTE_LOG(ERR, PORT, "%s: port is NULL\n", __func__);
 281                 return -EINVAL;
 282         }
 283
 284         rte_port_sched_writer_flush(port);
 285         rte_free(port);
 286
 287         return 0;
 288 }
 289
 290 static int
 291 rte_port_sched_writer_stats_read(void *port,
 292                 struct rte_port_out_stats *stats, int clear)
 293 {
 294         struct rte_port_sched_writer *p =
 295                 (struct rte_port_sched_writer *) port;
 296
 297         if (stats != NULL)
 298                 memcpy(stats, &p->stats, sizeof(p->stats));
 299
 300         if (clear)
 301                 memset(&p->stats, 0, sizeof(p->stats));
 302
 303         return 0;
 304 }
 305
 306 /*
 307  * Summary of port operations
 308  */
 309 struct rte_port_in_ops rte_port_sched_reader_ops = {
 310         .f_create = rte_port_sched_reader_create,
 311         .f_free = rte_port_sched_reader_free,
 312         .f_rx = rte_port_sched_reader_rx,
 313         .f_stats = rte_port_sched_reader_stats_read,
 314 };
 315
 316 struct rte_port_out_ops rte_port_sched_writer_ops = {
 317         .f_create = rte_port_sched_writer_create,
 318         .f_free = rte_port_sched_writer_free,
 319         .f_tx = rte_port_sched_writer_tx,
 320         .f_tx_bulk = rte_port_sched_writer_tx_bulk,
 321         .f_flush = rte_port_sched_writer_flush,
 322         .f_stats = rte_port_sched_writer_stats_read,
 323 };