ceph/src/seastar/dpdk/drivers/crypto/scheduler/scheduler_multicore.c

   1 /* SPDX-License-Identifier: BSD-3-Clause
   2  * Copyright(c) 2017 Intel Corporation
   3  */
   4 #include <unistd.h>
   5
   6 #include <rte_cryptodev.h>
   7 #include <rte_malloc.h>
   8
   9 #include "rte_cryptodev_scheduler_operations.h"
  10 #include "scheduler_pmd_private.h"
  11
  12 #define MC_SCHED_ENQ_RING_NAME_PREFIX   "MCS_ENQR_"
  13 #define MC_SCHED_DEQ_RING_NAME_PREFIX   "MCS_DEQR_"
  14
  15 #define MC_SCHED_BUFFER_SIZE 32
  16
  17 #define CRYPTO_OP_STATUS_BIT_COMPLETE   0x80
  18
  19 /** multi-core scheduler context */
  20 struct mc_scheduler_ctx {
  21         uint32_t num_workers;             /**< Number of workers polling */
  22         uint32_t stop_signal;
  23
  24         struct rte_ring *sched_enq_ring[RTE_MAX_LCORE];
  25         struct rte_ring *sched_deq_ring[RTE_MAX_LCORE];
  26 };
  27
  28 struct mc_scheduler_qp_ctx {
  29         struct scheduler_slave slaves[RTE_CRYPTODEV_SCHEDULER_MAX_NB_SLAVES];
  30         uint32_t nb_slaves;
  31
  32         uint32_t last_enq_worker_idx;
  33         uint32_t last_deq_worker_idx;
  34
  35         struct mc_scheduler_ctx *mc_private_ctx;
  36 };
  37
  38 static uint16_t
  39 schedule_enqueue(void *qp, struct rte_crypto_op **ops, uint16_t nb_ops)
  40 {
  41         struct mc_scheduler_qp_ctx *mc_qp_ctx =
  42                         ((struct scheduler_qp_ctx *)qp)->private_qp_ctx;
  43         struct mc_scheduler_ctx *mc_ctx = mc_qp_ctx->mc_private_ctx;
  44         uint32_t worker_idx = mc_qp_ctx->last_enq_worker_idx;
  45         uint16_t i, processed_ops = 0;
  46
  47         if (unlikely(nb_ops == 0))
  48                 return 0;
  49
  50         for (i = 0; i <  mc_ctx->num_workers && nb_ops != 0; i++) {
  51                 struct rte_ring *enq_ring = mc_ctx->sched_enq_ring[worker_idx];
  52                 uint16_t nb_queue_ops = rte_ring_enqueue_burst(enq_ring,
  53                         (void *)(&ops[processed_ops]), nb_ops, NULL);
  54
  55                 nb_ops -= nb_queue_ops;
  56                 processed_ops += nb_queue_ops;
  57
  58                 if (++worker_idx == mc_ctx->num_workers)
  59                         worker_idx = 0;
  60         }
  61         mc_qp_ctx->last_enq_worker_idx = worker_idx;
  62
  63         return processed_ops;
  64 }
  65
  66 static uint16_t
  67 schedule_enqueue_ordering(void *qp, struct rte_crypto_op **ops,
  68                 uint16_t nb_ops)
  69 {
  70         struct rte_ring *order_ring =
  71                         ((struct scheduler_qp_ctx *)qp)->order_ring;
  72         uint16_t nb_ops_to_enq = get_max_enqueue_order_count(order_ring,
  73                         nb_ops);
  74         uint16_t nb_ops_enqd = schedule_enqueue(qp, ops,
  75                         nb_ops_to_enq);
  76
  77         scheduler_order_insert(order_ring, ops, nb_ops_enqd);
  78
  79         return nb_ops_enqd;
  80 }
  81
  82
  83 static uint16_t
  84 schedule_dequeue(void *qp, struct rte_crypto_op **ops, uint16_t nb_ops)
  85 {
  86         struct mc_scheduler_qp_ctx *mc_qp_ctx =
  87                         ((struct scheduler_qp_ctx *)qp)->private_qp_ctx;
  88         struct mc_scheduler_ctx *mc_ctx = mc_qp_ctx->mc_private_ctx;
  89         uint32_t worker_idx = mc_qp_ctx->last_deq_worker_idx;
  90         uint16_t i, processed_ops = 0;
  91
  92         for (i = 0; i < mc_ctx->num_workers && nb_ops != 0; i++) {
  93                 struct rte_ring *deq_ring = mc_ctx->sched_deq_ring[worker_idx];
  94                 uint16_t nb_deq_ops = rte_ring_dequeue_burst(deq_ring,
  95                         (void *)(&ops[processed_ops]), nb_ops, NULL);
  96
  97                 nb_ops -= nb_deq_ops;
  98                 processed_ops += nb_deq_ops;
  99                 if (++worker_idx == mc_ctx->num_workers)
 100                         worker_idx = 0;
 101         }
 102
 103         mc_qp_ctx->last_deq_worker_idx = worker_idx;
 104
 105         return processed_ops;
 106
 107 }
 108
 109 static uint16_t
 110 schedule_dequeue_ordering(void *qp, struct rte_crypto_op **ops,
 111                 uint16_t nb_ops)
 112 {
 113         struct rte_ring *order_ring = ((struct scheduler_qp_ctx *)qp)->order_ring;
 114         struct rte_crypto_op *op;
 115         uint32_t nb_objs = rte_ring_count(order_ring);
 116         uint32_t nb_ops_to_deq = 0;
 117         uint32_t nb_ops_deqd = 0;
 118
 119         if (nb_objs > nb_ops)
 120                 nb_objs = nb_ops;
 121
 122         while (nb_ops_to_deq < nb_objs) {
 123                 SCHEDULER_GET_RING_OBJ(order_ring, nb_ops_to_deq, op);
 124
 125                 if (!(op->status & CRYPTO_OP_STATUS_BIT_COMPLETE))
 126                         break;
 127
 128                 op->status &= ~CRYPTO_OP_STATUS_BIT_COMPLETE;
 129                 nb_ops_to_deq++;
 130         }
 131
 132         if (nb_ops_to_deq) {
 133                 nb_ops_deqd = rte_ring_sc_dequeue_bulk(order_ring,
 134                                 (void **)ops, nb_ops_to_deq, NULL);
 135         }
 136
 137         return nb_ops_deqd;
 138 }
 139
 140 static int
 141 slave_attach(__rte_unused struct rte_cryptodev *dev,
 142                 __rte_unused uint8_t slave_id)
 143 {
 144         return 0;
 145 }
 146
 147 static int
 148 slave_detach(__rte_unused struct rte_cryptodev *dev,
 149                 __rte_unused uint8_t slave_id)
 150 {
 151         return 0;
 152 }
 153
 154 static int
 155 mc_scheduler_worker(struct rte_cryptodev *dev)
 156 {
 157         struct scheduler_ctx *sched_ctx = dev->data->dev_private;
 158         struct mc_scheduler_ctx *mc_ctx = sched_ctx->private_ctx;
 159         struct rte_ring *enq_ring;
 160         struct rte_ring *deq_ring;
 161         uint32_t core_id = rte_lcore_id();
 162         int i, worker_idx = -1;
 163         struct scheduler_slave *slave;
 164         struct rte_crypto_op *enq_ops[MC_SCHED_BUFFER_SIZE];
 165         struct rte_crypto_op *deq_ops[MC_SCHED_BUFFER_SIZE];
 166         uint16_t processed_ops;
 167         uint16_t pending_enq_ops = 0;
 168         uint16_t pending_enq_ops_idx = 0;
 169         uint16_t pending_deq_ops = 0;
 170         uint16_t pending_deq_ops_idx = 0;
 171         uint16_t inflight_ops = 0;
 172         const uint8_t reordering_enabled = sched_ctx->reordering_enabled;
 173
 174         for (i = 0; i < (int)sched_ctx->nb_wc; i++) {
 175                 if (sched_ctx->wc_pool[i] == core_id) {
 176                         worker_idx = i;
 177                         break;
 178                 }
 179         }
 180         if (worker_idx == -1) {
 181                 CR_SCHED_LOG(ERR, "worker on core %u:cannot find worker index!",
 182                         core_id);
 183                 return -1;
 184         }
 185
 186         slave = &sched_ctx->slaves[worker_idx];
 187         enq_ring = mc_ctx->sched_enq_ring[worker_idx];
 188         deq_ring = mc_ctx->sched_deq_ring[worker_idx];
 189
 190         while (!mc_ctx->stop_signal) {
 191                 if (pending_enq_ops) {
 192                         processed_ops =
 193                                 rte_cryptodev_enqueue_burst(slave->dev_id,
 194                                         slave->qp_id, &enq_ops[pending_enq_ops_idx],
 195                                         pending_enq_ops);
 196                         pending_enq_ops -= processed_ops;
 197                         pending_enq_ops_idx += processed_ops;
 198                         inflight_ops += processed_ops;
 199                 } else {
 200                         processed_ops = rte_ring_dequeue_burst(enq_ring, (void *)enq_ops,
 201                                                         MC_SCHED_BUFFER_SIZE, NULL);
 202                         if (processed_ops) {
 203                                 pending_enq_ops_idx = rte_cryptodev_enqueue_burst(
 204                                                         slave->dev_id, slave->qp_id,
 205                                                         enq_ops, processed_ops);
 206                                 pending_enq_ops = processed_ops - pending_enq_ops_idx;
 207                                 inflight_ops += pending_enq_ops_idx;
 208                         }
 209                 }
 210
 211                 if (pending_deq_ops) {
 212                         processed_ops = rte_ring_enqueue_burst(
 213                                         deq_ring, (void *)&deq_ops[pending_deq_ops_idx],
 214                                                         pending_deq_ops, NULL);
 215                         pending_deq_ops -= processed_ops;
 216                         pending_deq_ops_idx += processed_ops;
 217                 } else if (inflight_ops) {
 218                         processed_ops = rte_cryptodev_dequeue_burst(slave->dev_id,
 219                                         slave->qp_id, deq_ops, MC_SCHED_BUFFER_SIZE);
 220                         if (processed_ops) {
 221                                 inflight_ops -= processed_ops;
 222                                 if (reordering_enabled) {
 223                                         uint16_t j;
 224
 225                                         for (j = 0; j < processed_ops; j++) {
 226                                                 deq_ops[j]->status |=
 227                                                         CRYPTO_OP_STATUS_BIT_COMPLETE;
 228                                         }
 229                                 } else {
 230                                         pending_deq_ops_idx = rte_ring_enqueue_burst(
 231                                                 deq_ring, (void *)deq_ops, processed_ops,
 232                                                 NULL);
 233                                         pending_deq_ops = processed_ops -
 234                                                                 pending_deq_ops_idx;
 235                                 }
 236                         }
 237                 }
 238
 239                 rte_pause();
 240         }
 241
 242         return 0;
 243 }
 244
 245 static int
 246 scheduler_start(struct rte_cryptodev *dev)
 247 {
 248         struct scheduler_ctx *sched_ctx = dev->data->dev_private;
 249         struct mc_scheduler_ctx *mc_ctx = sched_ctx->private_ctx;
 250         uint16_t i;
 251
 252         mc_ctx->stop_signal = 0;
 253
 254         for (i = 0; i < sched_ctx->nb_wc; i++)
 255                 rte_eal_remote_launch(
 256                         (lcore_function_t *)mc_scheduler_worker, dev,
 257                                         sched_ctx->wc_pool[i]);
 258
 259         if (sched_ctx->reordering_enabled) {
 260                 dev->enqueue_burst = &schedule_enqueue_ordering;
 261                 dev->dequeue_burst = &schedule_dequeue_ordering;
 262         } else {
 263                 dev->enqueue_burst = &schedule_enqueue;
 264                 dev->dequeue_burst = &schedule_dequeue;
 265         }
 266
 267         for (i = 0; i < dev->data->nb_queue_pairs; i++) {
 268                 struct scheduler_qp_ctx *qp_ctx = dev->data->queue_pairs[i];
 269                 struct mc_scheduler_qp_ctx *mc_qp_ctx =
 270                                 qp_ctx->private_qp_ctx;
 271                 uint32_t j;
 272
 273                 memset(mc_qp_ctx->slaves, 0,
 274                                 RTE_CRYPTODEV_SCHEDULER_MAX_NB_SLAVES *
 275                                 sizeof(struct scheduler_slave));
 276                 for (j = 0; j < sched_ctx->nb_slaves; j++) {
 277                         mc_qp_ctx->slaves[j].dev_id =
 278                                         sched_ctx->slaves[j].dev_id;
 279                         mc_qp_ctx->slaves[j].qp_id = i;
 280                 }
 281
 282                 mc_qp_ctx->nb_slaves = sched_ctx->nb_slaves;
 283
 284                 mc_qp_ctx->last_enq_worker_idx = 0;
 285                 mc_qp_ctx->last_deq_worker_idx = 0;
 286         }
 287
 288         return 0;
 289 }
 290
 291 static int
 292 scheduler_stop(struct rte_cryptodev *dev)
 293 {
 294         struct scheduler_ctx *sched_ctx = dev->data->dev_private;
 295         struct mc_scheduler_ctx *mc_ctx = sched_ctx->private_ctx;
 296         uint16_t i;
 297
 298         mc_ctx->stop_signal = 1;
 299
 300         for (i = 0; i < sched_ctx->nb_wc; i++)
 301                 rte_eal_wait_lcore(sched_ctx->wc_pool[i]);
 302
 303         return 0;
 304 }
 305
 306 static int
 307 scheduler_config_qp(struct rte_cryptodev *dev, uint16_t qp_id)
 308 {
 309         struct scheduler_qp_ctx *qp_ctx = dev->data->queue_pairs[qp_id];
 310         struct mc_scheduler_qp_ctx *mc_qp_ctx;
 311         struct scheduler_ctx *sched_ctx = dev->data->dev_private;
 312         struct mc_scheduler_ctx *mc_ctx = sched_ctx->private_ctx;
 313
 314         mc_qp_ctx = rte_zmalloc_socket(NULL, sizeof(*mc_qp_ctx), 0,
 315                         rte_socket_id());
 316         if (!mc_qp_ctx) {
 317                 CR_SCHED_LOG(ERR, "failed allocate memory for private queue pair");
 318                 return -ENOMEM;
 319         }
 320
 321         mc_qp_ctx->mc_private_ctx = mc_ctx;
 322         qp_ctx->private_qp_ctx = (void *)mc_qp_ctx;
 323
 324
 325         return 0;
 326 }
 327
 328 static int
 329 scheduler_create_private_ctx(struct rte_cryptodev *dev)
 330 {
 331         struct scheduler_ctx *sched_ctx = dev->data->dev_private;
 332         struct mc_scheduler_ctx *mc_ctx = NULL;
 333         uint16_t i;
 334
 335         if (sched_ctx->private_ctx) {
 336                 rte_free(sched_ctx->private_ctx);
 337                 sched_ctx->private_ctx = NULL;
 338         }
 339
 340         mc_ctx = rte_zmalloc_socket(NULL, sizeof(struct mc_scheduler_ctx), 0,
 341                         rte_socket_id());
 342         if (!mc_ctx) {
 343                 CR_SCHED_LOG(ERR, "failed allocate memory");
 344                 return -ENOMEM;
 345         }
 346
 347         mc_ctx->num_workers = sched_ctx->nb_wc;
 348         for (i = 0; i < sched_ctx->nb_wc; i++) {
 349                 char r_name[16];
 350
 351                 snprintf(r_name, sizeof(r_name), MC_SCHED_ENQ_RING_NAME_PREFIX
 352                                 "%u_%u", dev->data->dev_id, i);
 353                 mc_ctx->sched_enq_ring[i] = rte_ring_lookup(r_name);
 354                 if (!mc_ctx->sched_enq_ring[i]) {
 355                         mc_ctx->sched_enq_ring[i] = rte_ring_create(r_name,
 356                                                 PER_SLAVE_BUFF_SIZE,
 357                                                 rte_socket_id(),
 358                                                 RING_F_SC_DEQ | RING_F_SP_ENQ);
 359                         if (!mc_ctx->sched_enq_ring[i]) {
 360                                 CR_SCHED_LOG(ERR, "Cannot create ring for worker %u",
 361                                            i);
 362                                 goto exit;
 363                         }
 364                 }
 365                 snprintf(r_name, sizeof(r_name), MC_SCHED_DEQ_RING_NAME_PREFIX
 366                                 "%u_%u", dev->data->dev_id, i);
 367                 mc_ctx->sched_deq_ring[i] = rte_ring_lookup(r_name);
 368                 if (!mc_ctx->sched_deq_ring[i]) {
 369                         mc_ctx->sched_deq_ring[i] = rte_ring_create(r_name,
 370                                                 PER_SLAVE_BUFF_SIZE,
 371                                                 rte_socket_id(),
 372                                                 RING_F_SC_DEQ | RING_F_SP_ENQ);
 373                         if (!mc_ctx->sched_deq_ring[i]) {
 374                                 CR_SCHED_LOG(ERR, "Cannot create ring for worker %u",
 375                                            i);
 376                                 goto exit;
 377                         }
 378                 }
 379         }
 380
 381         sched_ctx->private_ctx = (void *)mc_ctx;
 382
 383         return 0;
 384
 385 exit:
 386         for (i = 0; i < sched_ctx->nb_wc; i++) {
 387                 rte_ring_free(mc_ctx->sched_enq_ring[i]);
 388                 rte_ring_free(mc_ctx->sched_deq_ring[i]);
 389         }
 390         rte_free(mc_ctx);
 391
 392         return -1;
 393 }
 394
 395 static struct rte_cryptodev_scheduler_ops scheduler_mc_ops = {
 396         slave_attach,
 397         slave_detach,
 398         scheduler_start,
 399         scheduler_stop,
 400         scheduler_config_qp,
 401         scheduler_create_private_ctx,
 402         NULL,   /* option_set */
 403         NULL    /* option_get */
 404 };
 405
 406 static struct rte_cryptodev_scheduler mc_scheduler = {
 407                 .name = "multicore-scheduler",
 408                 .description = "scheduler which will run burst across multiple cpu cores",
 409                 .mode = CDEV_SCHED_MODE_MULTICORE,
 410                 .ops = &scheduler_mc_ops
 411 };
 412
 413 struct rte_cryptodev_scheduler *crypto_scheduler_multicore = &mc_scheduler;