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

   1 /* SPDX-License-Identifier: BSD-3-Clause
   2  * Copyright(c) 2010-2014 Intel Corporation
   3  */
   4 #include <string.h>
   5
   6 #include <rte_mbuf.h>
   7 #include <rte_malloc.h>
   8
   9 #include "rte_port_sched.h"
  10
  11 /*
  12  * Reader
  13  */
  14 #ifdef RTE_PORT_STATS_COLLECT
  15
  16 #define RTE_PORT_SCHED_READER_PKTS_IN_ADD(port, val) \
  17         port->stats.n_pkts_in += val
  18 #define RTE_PORT_SCHED_READER_PKTS_DROP_ADD(port, val) \
  19         port->stats.n_pkts_drop += val
  20
  21 #else
  22
  23 #define RTE_PORT_SCHED_READER_PKTS_IN_ADD(port, val)
  24 #define RTE_PORT_SCHED_READER_PKTS_DROP_ADD(port, val)
  25
  26 #endif
  27
  28 struct rte_port_sched_reader {
  29         struct rte_port_in_stats stats;
  30
  31         struct rte_sched_port *sched;
  32 };
  33
  34 static void *
  35 rte_port_sched_reader_create(void *params, int socket_id)
  36 {
  37         struct rte_port_sched_reader_params *conf =
  38                         params;
  39         struct rte_port_sched_reader *port;
  40
  41         /* Check input parameters */
  42         if ((conf == NULL) ||
  43             (conf->sched == NULL)) {
  44                 RTE_LOG(ERR, PORT, "%s: Invalid params\n", __func__);
  45                 return NULL;
  46         }
  47
  48         /* Memory allocation */
  49         port = rte_zmalloc_socket("PORT", sizeof(*port),
  50                         RTE_CACHE_LINE_SIZE, socket_id);
  51         if (port == NULL) {
  52                 RTE_LOG(ERR, PORT, "%s: Failed to allocate port\n", __func__);
  53                 return NULL;
  54         }
  55
  56         /* Initialization */
  57         port->sched = conf->sched;
  58
  59         return port;
  60 }
  61
  62 static int
  63 rte_port_sched_reader_rx(void *port, struct rte_mbuf **pkts, uint32_t n_pkts)
  64 {
  65         struct rte_port_sched_reader *p = port;
  66         uint32_t nb_rx;
  67
  68         nb_rx = rte_sched_port_dequeue(p->sched, pkts, n_pkts);
  69         RTE_PORT_SCHED_READER_PKTS_IN_ADD(p, nb_rx);
  70
  71         return nb_rx;
  72 }
  73
  74 static int
  75 rte_port_sched_reader_free(void *port)
  76 {
  77         if (port == NULL) {
  78                 RTE_LOG(ERR, PORT, "%s: port is NULL\n", __func__);
  79                 return -EINVAL;
  80         }
  81
  82         rte_free(port);
  83
  84         return 0;
  85 }
  86
  87 static int
  88 rte_port_sched_reader_stats_read(void *port,
  89                 struct rte_port_in_stats *stats, int clear)
  90 {
  91         struct rte_port_sched_reader *p =
  92                 port;
  93
  94         if (stats != NULL)
  95                 memcpy(stats, &p->stats, sizeof(p->stats));
  96
  97         if (clear)
  98                 memset(&p->stats, 0, sizeof(p->stats));
  99
 100         return 0;
 101 }
 102
 103 /*
 104  * Writer
 105  */
 106 #ifdef RTE_PORT_STATS_COLLECT
 107
 108 #define RTE_PORT_SCHED_WRITER_STATS_PKTS_IN_ADD(port, val) \
 109         port->stats.n_pkts_in += val
 110 #define RTE_PORT_SCHED_WRITER_STATS_PKTS_DROP_ADD(port, val) \
 111         port->stats.n_pkts_drop += val
 112
 113 #else
 114
 115 #define RTE_PORT_SCHED_WRITER_STATS_PKTS_IN_ADD(port, val)
 116 #define RTE_PORT_SCHED_WRITER_STATS_PKTS_DROP_ADD(port, val)
 117
 118 #endif
 119
 120 struct rte_port_sched_writer {
 121         struct rte_port_out_stats stats;
 122
 123         struct rte_mbuf *tx_buf[2 * RTE_PORT_IN_BURST_SIZE_MAX];
 124         struct rte_sched_port *sched;
 125         uint32_t tx_burst_sz;
 126         uint32_t tx_buf_count;
 127         uint64_t bsz_mask;
 128 };
 129
 130 static void *
 131 rte_port_sched_writer_create(void *params, int socket_id)
 132 {
 133         struct rte_port_sched_writer_params *conf =
 134                         params;
 135         struct rte_port_sched_writer *port;
 136
 137         /* Check input parameters */
 138         if ((conf == NULL) ||
 139             (conf->sched == NULL) ||
 140             (conf->tx_burst_sz == 0) ||
 141             (conf->tx_burst_sz > RTE_PORT_IN_BURST_SIZE_MAX) ||
 142                 (!rte_is_power_of_2(conf->tx_burst_sz))) {
 143                 RTE_LOG(ERR, PORT, "%s: Invalid params\n", __func__);
 144                 return NULL;
 145         }
 146
 147         /* Memory allocation */
 148         port = rte_zmalloc_socket("PORT", sizeof(*port),
 149                         RTE_CACHE_LINE_SIZE, socket_id);
 150         if (port == NULL) {
 151                 RTE_LOG(ERR, PORT, "%s: Failed to allocate port\n", __func__);
 152                 return NULL;
 153         }
 154
 155         /* Initialization */
 156         port->sched = conf->sched;
 157         port->tx_burst_sz = conf->tx_burst_sz;
 158         port->tx_buf_count = 0;
 159         port->bsz_mask = 1LLU << (conf->tx_burst_sz - 1);
 160
 161         return port;
 162 }
 163
 164 static int
 165 rte_port_sched_writer_tx(void *port, struct rte_mbuf *pkt)
 166 {
 167         struct rte_port_sched_writer *p = (struct rte_port_sched_writer *) port;
 168
 169         p->tx_buf[p->tx_buf_count++] = pkt;
 170         RTE_PORT_SCHED_WRITER_STATS_PKTS_IN_ADD(p, 1);
 171         if (p->tx_buf_count >= p->tx_burst_sz) {
 172                 __rte_unused uint32_t nb_tx;
 173
 174                 nb_tx = rte_sched_port_enqueue(p->sched, p->tx_buf, p->tx_buf_count);
 175                 RTE_PORT_SCHED_WRITER_STATS_PKTS_DROP_ADD(p, p->tx_buf_count - nb_tx);
 176                 p->tx_buf_count = 0;
 177         }
 178
 179         return 0;
 180 }
 181
 182 static int
 183 rte_port_sched_writer_tx_bulk(void *port,
 184                 struct rte_mbuf **pkts,
 185                 uint64_t pkts_mask)
 186 {
 187         struct rte_port_sched_writer *p = (struct rte_port_sched_writer *) port;
 188         uint64_t bsz_mask = p->bsz_mask;
 189         uint32_t tx_buf_count = p->tx_buf_count;
 190         uint64_t expr = (pkts_mask & (pkts_mask + 1)) |
 191                         ((pkts_mask & bsz_mask) ^ bsz_mask);
 192
 193         if (expr == 0) {
 194                 __rte_unused uint32_t nb_tx;
 195                 uint64_t n_pkts = __builtin_popcountll(pkts_mask);
 196
 197                 if (tx_buf_count) {
 198                         nb_tx = rte_sched_port_enqueue(p->sched, p->tx_buf,
 199                                 tx_buf_count);
 200                         RTE_PORT_SCHED_WRITER_STATS_PKTS_DROP_ADD(p, tx_buf_count - nb_tx);
 201                         p->tx_buf_count = 0;
 202                 }
 203
 204                 nb_tx = rte_sched_port_enqueue(p->sched, pkts, n_pkts);
 205                 RTE_PORT_SCHED_WRITER_STATS_PKTS_DROP_ADD(p, n_pkts - nb_tx);
 206         } else {
 207                 for ( ; pkts_mask; ) {
 208                         uint32_t pkt_index = __builtin_ctzll(pkts_mask);
 209                         uint64_t pkt_mask = 1LLU << pkt_index;
 210                         struct rte_mbuf *pkt = pkts[pkt_index];
 211
 212                         p->tx_buf[tx_buf_count++] = pkt;
 213                         RTE_PORT_SCHED_WRITER_STATS_PKTS_IN_ADD(p, 1);
 214                         pkts_mask &= ~pkt_mask;
 215                 }
 216                 p->tx_buf_count = tx_buf_count;
 217
 218                 if (tx_buf_count >= p->tx_burst_sz) {
 219                         __rte_unused uint32_t nb_tx;
 220
 221                         nb_tx = rte_sched_port_enqueue(p->sched, p->tx_buf,
 222                                 tx_buf_count);
 223                         RTE_PORT_SCHED_WRITER_STATS_PKTS_DROP_ADD(p, tx_buf_count - nb_tx);
 224                         p->tx_buf_count = 0;
 225                 }
 226         }
 227
 228         return 0;
 229 }
 230
 231 static int
 232 rte_port_sched_writer_flush(void *port)
 233 {
 234         struct rte_port_sched_writer *p = (struct rte_port_sched_writer *) port;
 235
 236         if (p->tx_buf_count) {
 237                 __rte_unused uint32_t nb_tx;
 238
 239                 nb_tx = rte_sched_port_enqueue(p->sched, p->tx_buf, p->tx_buf_count);
 240                 RTE_PORT_SCHED_WRITER_STATS_PKTS_DROP_ADD(p, p->tx_buf_count - nb_tx);
 241                 p->tx_buf_count = 0;
 242         }
 243
 244         return 0;
 245 }
 246
 247 static int
 248 rte_port_sched_writer_free(void *port)
 249 {
 250         if (port == NULL) {
 251                 RTE_LOG(ERR, PORT, "%s: port is NULL\n", __func__);
 252                 return -EINVAL;
 253         }
 254
 255         rte_port_sched_writer_flush(port);
 256         rte_free(port);
 257
 258         return 0;
 259 }
 260
 261 static int
 262 rte_port_sched_writer_stats_read(void *port,
 263                 struct rte_port_out_stats *stats, int clear)
 264 {
 265         struct rte_port_sched_writer *p =
 266                 port;
 267
 268         if (stats != NULL)
 269                 memcpy(stats, &p->stats, sizeof(p->stats));
 270
 271         if (clear)
 272                 memset(&p->stats, 0, sizeof(p->stats));
 273
 274         return 0;
 275 }
 276
 277 /*
 278  * Summary of port operations
 279  */
 280 struct rte_port_in_ops rte_port_sched_reader_ops = {
 281         .f_create = rte_port_sched_reader_create,
 282         .f_free = rte_port_sched_reader_free,
 283         .f_rx = rte_port_sched_reader_rx,
 284         .f_stats = rte_port_sched_reader_stats_read,
 285 };
 286
 287 struct rte_port_out_ops rte_port_sched_writer_ops = {
 288         .f_create = rte_port_sched_writer_create,
 289         .f_free = rte_port_sched_writer_free,
 290         .f_tx = rte_port_sched_writer_tx,
 291         .f_tx_bulk = rte_port_sched_writer_tx_bulk,
 292         .f_flush = rte_port_sched_writer_flush,
 293         .f_stats = rte_port_sched_writer_stats_read,
 294 };