lib/sched/rte_sched.c

   1 /* SPDX-License-Identifier: BSD-3-Clause
   2  * Copyright(c) 2010-2014 Intel Corporation
   3  */
   4
   5 #include <stdio.h>
   6 #include <string.h>
   7
   8 #include <rte_common.h>
   9 #include <rte_log.h>
  10 #include <rte_memory.h>
  11 #include <rte_malloc.h>
  12 #include <rte_cycles.h>
  13 #include <rte_prefetch.h>
  14 #include <rte_branch_prediction.h>
  15 #include <rte_mbuf.h>
  16 #include <rte_bitmap.h>
  17 #include <rte_reciprocal.h>
  18
  19 #include "rte_sched.h"
  20 #include "rte_sched_common.h"
  21 #include "rte_approx.h"
  22
  23 #ifdef __INTEL_COMPILER
  24 #pragma warning(disable:2259) /* conversion may lose significant bits */
  25 #endif
  26
  27 #ifdef RTE_SCHED_VECTOR
  28 #include <rte_vect.h>
  29
  30 #ifdef RTE_ARCH_X86
  31 #define SCHED_VECTOR_SSE4
  32 #elif defined(__ARM_NEON)
  33 #define SCHED_VECTOR_NEON
  34 #endif
  35
  36 #endif
  37
  38 #define RTE_SCHED_TB_RATE_CONFIG_ERR          (1e-7)
  39 #define RTE_SCHED_WRR_SHIFT                   3
  40 #define RTE_SCHED_MAX_QUEUES_PER_TC           RTE_SCHED_BE_QUEUES_PER_PIPE
  41 #define RTE_SCHED_GRINDER_PCACHE_SIZE         (64 / RTE_SCHED_QUEUES_PER_PIPE)
  42 #define RTE_SCHED_PIPE_INVALID                UINT32_MAX
  43 #define RTE_SCHED_BMP_POS_INVALID             UINT32_MAX
  44
  45 /* Scaling for cycles_per_byte calculation
  46  * Chosen so that minimum rate is 480 bit/sec
  47  */
  48 #define RTE_SCHED_TIME_SHIFT                  8
  49
  50 struct rte_sched_pipe_profile {
  51         /* Token bucket (TB) */
  52         uint64_t tb_period;
  53         uint64_t tb_credits_per_period;
  54         uint64_t tb_size;
  55
  56         /* Pipe traffic classes */
  57         uint64_t tc_period;
  58         uint64_t tc_credits_per_period[RTE_SCHED_TRAFFIC_CLASSES_PER_PIPE];
  59         uint8_t tc_ov_weight;
  60
  61         /* Pipe best-effort traffic class queues */
  62         uint8_t  wrr_cost[RTE_SCHED_BE_QUEUES_PER_PIPE];
  63 };
  64
  65 struct rte_sched_pipe {
  66         /* Token bucket (TB) */
  67         uint64_t tb_time; /* time of last update */
  68         uint64_t tb_credits;
  69
  70         /* Pipe profile and flags */
  71         uint32_t profile;
  72
  73         /* Traffic classes (TCs) */
  74         uint64_t tc_time; /* time of next update */
  75         uint64_t tc_credits[RTE_SCHED_TRAFFIC_CLASSES_PER_PIPE];
  76
  77         /* Weighted Round Robin (WRR) */
  78         uint8_t wrr_tokens[RTE_SCHED_BE_QUEUES_PER_PIPE];
  79
  80         /* TC oversubscription */
  81         uint64_t tc_ov_credits;
  82         uint8_t tc_ov_period_id;
  83 } __rte_cache_aligned;
  84
  85 struct rte_sched_queue {
  86         uint16_t qw;
  87         uint16_t qr;
  88 };
  89
  90 struct rte_sched_queue_extra {
  91         struct rte_sched_queue_stats stats;
  92 #ifdef RTE_SCHED_RED
  93         struct rte_red red;
  94 #endif
  95 };
  96
  97 enum grinder_state {
  98         e_GRINDER_PREFETCH_PIPE = 0,
  99         e_GRINDER_PREFETCH_TC_QUEUE_ARRAYS,
 100         e_GRINDER_PREFETCH_MBUF,
 101         e_GRINDER_READ_MBUF
 102 };
 103
 104 struct rte_sched_subport_profile {
 105         /* Token bucket (TB) */
 106         uint64_t tb_period;
 107         uint64_t tb_credits_per_period;
 108         uint64_t tb_size;
 109
 110         uint64_t tc_credits_per_period[RTE_SCHED_TRAFFIC_CLASSES_PER_PIPE];
 111         uint64_t tc_period;
 112 };
 113
 114 struct rte_sched_grinder {
 115         /* Pipe cache */
 116         uint16_t pcache_qmask[RTE_SCHED_GRINDER_PCACHE_SIZE];
 117         uint32_t pcache_qindex[RTE_SCHED_GRINDER_PCACHE_SIZE];
 118         uint32_t pcache_w;
 119         uint32_t pcache_r;
 120
 121         /* Current pipe */
 122         enum grinder_state state;
 123         uint32_t productive;
 124         uint32_t pindex;
 125         struct rte_sched_subport *subport;
 126         struct rte_sched_subport_profile *subport_params;
 127         struct rte_sched_pipe *pipe;
 128         struct rte_sched_pipe_profile *pipe_params;
 129
 130         /* TC cache */
 131         uint8_t tccache_qmask[RTE_SCHED_TRAFFIC_CLASSES_PER_PIPE];
 132         uint32_t tccache_qindex[RTE_SCHED_TRAFFIC_CLASSES_PER_PIPE];
 133         uint32_t tccache_w;
 134         uint32_t tccache_r;
 135
 136         /* Current TC */
 137         uint32_t tc_index;
 138         struct rte_sched_queue *queue[RTE_SCHED_MAX_QUEUES_PER_TC];
 139         struct rte_mbuf **qbase[RTE_SCHED_MAX_QUEUES_PER_TC];
 140         uint32_t qindex[RTE_SCHED_MAX_QUEUES_PER_TC];
 141         uint16_t qsize;
 142         uint32_t qmask;
 143         uint32_t qpos;
 144         struct rte_mbuf *pkt;
 145
 146         /* WRR */
 147         uint16_t wrr_tokens[RTE_SCHED_BE_QUEUES_PER_PIPE];
 148         uint16_t wrr_mask[RTE_SCHED_BE_QUEUES_PER_PIPE];
 149         uint8_t wrr_cost[RTE_SCHED_BE_QUEUES_PER_PIPE];
 150 };
 151
 152 struct rte_sched_subport {
 153         /* Token bucket (TB) */
 154         uint64_t tb_time; /* time of last update */
 155         uint64_t tb_credits;
 156
 157         /* Traffic classes (TCs) */
 158         uint64_t tc_time; /* time of next update */
 159         uint64_t tc_credits[RTE_SCHED_TRAFFIC_CLASSES_PER_PIPE];
 160
 161         /* TC oversubscription */
 162         uint64_t tc_ov_wm;
 163         uint64_t tc_ov_wm_min;
 164         uint64_t tc_ov_wm_max;
 165         uint8_t tc_ov_period_id;
 166         uint8_t tc_ov;
 167         uint32_t tc_ov_n;
 168         double tc_ov_rate;
 169
 170         /* Statistics */
 171         struct rte_sched_subport_stats stats __rte_cache_aligned;
 172
 173         /* subport profile */
 174         uint32_t profile;
 175         /* Subport pipes */
 176         uint32_t n_pipes_per_subport_enabled;
 177         uint32_t n_pipe_profiles;
 178         uint32_t n_max_pipe_profiles;
 179
 180         /* Pipe best-effort TC rate */
 181         uint64_t pipe_tc_be_rate_max;
 182
 183         /* Pipe queues size */
 184         uint16_t qsize[RTE_SCHED_TRAFFIC_CLASSES_PER_PIPE];
 185
 186 #ifdef RTE_SCHED_RED
 187         struct rte_red_config red_config[RTE_SCHED_TRAFFIC_CLASSES_PER_PIPE][RTE_COLORS];
 188 #endif
 189
 190         /* Scheduling loop detection */
 191         uint32_t pipe_loop;
 192         uint32_t pipe_exhaustion;
 193
 194         /* Bitmap */
 195         struct rte_bitmap *bmp;
 196         uint32_t grinder_base_bmp_pos[RTE_SCHED_PORT_N_GRINDERS] __rte_aligned_16;
 197
 198         /* Grinders */
 199         struct rte_sched_grinder grinder[RTE_SCHED_PORT_N_GRINDERS];
 200         uint32_t busy_grinders;
 201
 202         /* Queue base calculation */
 203         uint32_t qsize_add[RTE_SCHED_QUEUES_PER_PIPE];
 204         uint32_t qsize_sum;
 205
 206         struct rte_sched_pipe *pipe;
 207         struct rte_sched_queue *queue;
 208         struct rte_sched_queue_extra *queue_extra;
 209         struct rte_sched_pipe_profile *pipe_profiles;
 210         uint8_t *bmp_array;
 211         struct rte_mbuf **queue_array;
 212         uint8_t memory[0] __rte_cache_aligned;
 213 } __rte_cache_aligned;
 214
 215 struct rte_sched_port {
 216         /* User parameters */
 217         uint32_t n_subports_per_port;
 218         uint32_t n_pipes_per_subport;
 219         uint32_t n_pipes_per_subport_log2;
 220         uint16_t pipe_queue[RTE_SCHED_TRAFFIC_CLASSES_PER_PIPE];
 221         uint8_t pipe_tc[RTE_SCHED_QUEUES_PER_PIPE];
 222         uint8_t tc_queue[RTE_SCHED_QUEUES_PER_PIPE];
 223         uint32_t n_subport_profiles;
 224         uint32_t n_max_subport_profiles;
 225         uint64_t rate;
 226         uint32_t mtu;
 227         uint32_t frame_overhead;
 228         int socket;
 229
 230         /* Timing */
 231         uint64_t time_cpu_cycles;     /* Current CPU time measured in CPU cyles */
 232         uint64_t time_cpu_bytes;      /* Current CPU time measured in bytes */
 233         uint64_t time;                /* Current NIC TX time measured in bytes */
 234         struct rte_reciprocal inv_cycles_per_byte; /* CPU cycles per byte */
 235         uint64_t cycles_per_byte;
 236
 237         /* Grinders */
 238         struct rte_mbuf **pkts_out;
 239         uint32_t n_pkts_out;
 240         uint32_t subport_id;
 241
 242         /* Large data structures */
 243         struct rte_sched_subport_profile *subport_profiles;
 244         struct rte_sched_subport *subports[0] __rte_cache_aligned;
 245 } __rte_cache_aligned;
 246
 247 enum rte_sched_subport_array {
 248         e_RTE_SCHED_SUBPORT_ARRAY_PIPE = 0,
 249         e_RTE_SCHED_SUBPORT_ARRAY_QUEUE,
 250         e_RTE_SCHED_SUBPORT_ARRAY_QUEUE_EXTRA,
 251         e_RTE_SCHED_SUBPORT_ARRAY_PIPE_PROFILES,
 252         e_RTE_SCHED_SUBPORT_ARRAY_BMP_ARRAY,
 253         e_RTE_SCHED_SUBPORT_ARRAY_QUEUE_ARRAY,
 254         e_RTE_SCHED_SUBPORT_ARRAY_TOTAL,
 255 };
 256
 257 static inline uint32_t
 258 rte_sched_subport_pipe_queues(struct rte_sched_subport *subport)
 259 {
 260         return RTE_SCHED_QUEUES_PER_PIPE * subport->n_pipes_per_subport_enabled;
 261 }
 262
 263 static inline struct rte_mbuf **
 264 rte_sched_subport_pipe_qbase(struct rte_sched_subport *subport, uint32_t qindex)
 265 {
 266         uint32_t pindex = qindex >> 4;
 267         uint32_t qpos = qindex & (RTE_SCHED_QUEUES_PER_PIPE - 1);
 268
 269         return (subport->queue_array + pindex *
 270                 subport->qsize_sum + subport->qsize_add[qpos]);
 271 }
 272
 273 static inline uint16_t
 274 rte_sched_subport_pipe_qsize(struct rte_sched_port *port,
 275 struct rte_sched_subport *subport, uint32_t qindex)
 276 {
 277         uint32_t tc = port->pipe_tc[qindex & (RTE_SCHED_QUEUES_PER_PIPE - 1)];
 278
 279         return subport->qsize[tc];
 280 }
 281
 282 static inline uint32_t
 283 rte_sched_port_queues_per_port(struct rte_sched_port *port)
 284 {
 285         uint32_t n_queues = 0, i;
 286
 287         for (i = 0; i < port->n_subports_per_port; i++)
 288                 n_queues += rte_sched_subport_pipe_queues(port->subports[i]);
 289
 290         return n_queues;
 291 }
 292
 293 static inline uint16_t
 294 rte_sched_port_pipe_queue(struct rte_sched_port *port, uint32_t traffic_class)
 295 {
 296         uint16_t pipe_queue = port->pipe_queue[traffic_class];
 297
 298         return pipe_queue;
 299 }
 300
 301 static inline uint8_t
 302 rte_sched_port_pipe_tc(struct rte_sched_port *port, uint32_t qindex)
 303 {
 304         uint8_t pipe_tc = port->pipe_tc[qindex & (RTE_SCHED_QUEUES_PER_PIPE - 1)];
 305
 306         return pipe_tc;
 307 }
 308
 309 static inline uint8_t
 310 rte_sched_port_tc_queue(struct rte_sched_port *port, uint32_t qindex)
 311 {
 312         uint8_t tc_queue = port->tc_queue[qindex & (RTE_SCHED_QUEUES_PER_PIPE - 1)];
 313
 314         return tc_queue;
 315 }
 316
 317 static int
 318 pipe_profile_check(struct rte_sched_pipe_params *params,
 319         uint64_t rate, uint16_t *qsize)
 320 {
 321         uint32_t i;
 322
 323         /* Pipe parameters */
 324         if (params == NULL) {
 325                 RTE_LOG(ERR, SCHED,
 326                         "%s: Incorrect value for parameter params\n", __func__);
 327                 return -EINVAL;
 328         }
 329
 330         /* TB rate: non-zero, not greater than port rate */
 331         if (params->tb_rate == 0 ||
 332                 params->tb_rate > rate) {
 333                 RTE_LOG(ERR, SCHED,
 334                         "%s: Incorrect value for tb rate\n", __func__);
 335                 return -EINVAL;
 336         }
 337
 338         /* TB size: non-zero */
 339         if (params->tb_size == 0) {
 340                 RTE_LOG(ERR, SCHED,
 341                         "%s: Incorrect value for tb size\n", __func__);
 342                 return -EINVAL;
 343         }
 344
 345         /* TC rate: non-zero if qsize non-zero, less than pipe rate */
 346         for (i = 0; i < RTE_SCHED_TRAFFIC_CLASSES_PER_PIPE; i++) {
 347                 if ((qsize[i] == 0 && params->tc_rate[i] != 0) ||
 348                         (qsize[i] != 0 && (params->tc_rate[i] == 0 ||
 349                         params->tc_rate[i] > params->tb_rate))) {
 350                         RTE_LOG(ERR, SCHED,
 351                                 "%s: Incorrect value for qsize or tc_rate\n", __func__);
 352                         return -EINVAL;
 353                 }
 354         }
 355
 356         if (params->tc_rate[RTE_SCHED_TRAFFIC_CLASS_BE] == 0 ||
 357                 qsize[RTE_SCHED_TRAFFIC_CLASS_BE] == 0) {
 358                 RTE_LOG(ERR, SCHED,
 359                         "%s: Incorrect value for be traffic class rate\n", __func__);
 360                 return -EINVAL;
 361         }
 362
 363         /* TC period: non-zero */
 364         if (params->tc_period == 0) {
 365                 RTE_LOG(ERR, SCHED,
 366                         "%s: Incorrect value for tc period\n", __func__);
 367                 return -EINVAL;
 368         }
 369
 370         /*  Best effort tc oversubscription weight: non-zero */
 371         if (params->tc_ov_weight == 0) {
 372                 RTE_LOG(ERR, SCHED,
 373                         "%s: Incorrect value for tc ov weight\n", __func__);
 374                 return -EINVAL;
 375         }
 376
 377         /* Queue WRR weights: non-zero */
 378         for (i = 0; i < RTE_SCHED_BE_QUEUES_PER_PIPE; i++) {
 379                 if (params->wrr_weights[i] == 0) {
 380                         RTE_LOG(ERR, SCHED,
 381                                 "%s: Incorrect value for wrr weight\n", __func__);
 382                         return -EINVAL;
 383                 }
 384         }
 385
 386         return 0;
 387 }
 388
 389 static int
 390 subport_profile_check(struct rte_sched_subport_profile_params *params,
 391         uint64_t rate)
 392 {
 393         uint32_t i;
 394
 395         /* Check user parameters */
 396         if (params == NULL) {
 397                 RTE_LOG(ERR, SCHED, "%s: "
 398                 "Incorrect value for parameter params\n", __func__);
 399                 return -EINVAL;
 400         }
 401
 402         if (params->tb_rate == 0 || params->tb_rate > rate) {
 403                 RTE_LOG(ERR, SCHED, "%s: "
 404                 "Incorrect value for tb rate\n", __func__);
 405                 return -EINVAL;
 406         }
 407
 408         if (params->tb_size == 0) {
 409                 RTE_LOG(ERR, SCHED, "%s: "
 410                 "Incorrect value for tb size\n", __func__);
 411                 return -EINVAL;
 412         }
 413
 414         for (i = 0; i < RTE_SCHED_TRAFFIC_CLASSES_PER_PIPE; i++) {
 415                 uint64_t tc_rate = params->tc_rate[i];
 416
 417                 if (tc_rate == 0 || (tc_rate > params->tb_rate)) {
 418                         RTE_LOG(ERR, SCHED, "%s: "
 419                         "Incorrect value for tc rate\n", __func__);
 420                         return -EINVAL;
 421                 }
 422         }
 423
 424         if (params->tc_rate[RTE_SCHED_TRAFFIC_CLASS_BE] == 0) {
 425                 RTE_LOG(ERR, SCHED, "%s: "
 426                 "Incorrect tc rate(best effort)\n", __func__);
 427                 return -EINVAL;
 428         }
 429
 430         if (params->tc_period == 0) {
 431                 RTE_LOG(ERR, SCHED, "%s: "
 432                 "Incorrect value for tc period\n", __func__);
 433                 return -EINVAL;
 434         }
 435
 436         return 0;
 437 }
 438
 439 static int
 440 rte_sched_port_check_params(struct rte_sched_port_params *params)
 441 {
 442         uint32_t i;
 443
 444         if (params == NULL) {
 445                 RTE_LOG(ERR, SCHED,
 446                         "%s: Incorrect value for parameter params\n", __func__);
 447                 return -EINVAL;
 448         }
 449
 450         /* socket */
 451         if (params->socket < 0) {
 452                 RTE_LOG(ERR, SCHED,
 453                         "%s: Incorrect value for socket id\n", __func__);
 454                 return -EINVAL;
 455         }
 456
 457         /* rate */
 458         if (params->rate == 0) {
 459                 RTE_LOG(ERR, SCHED,
 460                         "%s: Incorrect value for rate\n", __func__);
 461                 return -EINVAL;
 462         }
 463
 464         /* mtu */
 465         if (params->mtu == 0) {
 466                 RTE_LOG(ERR, SCHED,
 467                         "%s: Incorrect value for mtu\n", __func__);
 468                 return -EINVAL;
 469         }
 470
 471         /* n_subports_per_port: non-zero, limited to 16 bits, power of 2 */
 472         if (params->n_subports_per_port == 0 ||
 473             params->n_subports_per_port > 1u << 16 ||
 474             !rte_is_power_of_2(params->n_subports_per_port)) {
 475                 RTE_LOG(ERR, SCHED,
 476                         "%s: Incorrect value for number of subports\n", __func__);
 477                 return -EINVAL;
 478         }
 479
 480         if (params->subport_profiles == NULL ||
 481                 params->n_subport_profiles == 0 ||
 482                 params->n_max_subport_profiles == 0 ||
 483                 params->n_subport_profiles > params->n_max_subport_profiles) {
 484                 RTE_LOG(ERR, SCHED,
 485                 "%s: Incorrect value for subport profiles\n", __func__);
 486                 return -EINVAL;
 487         }
 488
 489         for (i = 0; i < params->n_subport_profiles; i++) {
 490                 struct rte_sched_subport_profile_params *p =
 491                                                 params->subport_profiles + i;
 492                 int status;
 493
 494                 status = subport_profile_check(p, params->rate);
 495                 if (status != 0) {
 496                         RTE_LOG(ERR, SCHED,
 497                         "%s: subport profile check failed(%d)\n",
 498                         __func__, status);
 499                         return -EINVAL;
 500                 }
 501         }
 502
 503         /* n_pipes_per_subport: non-zero, power of 2 */
 504         if (params->n_pipes_per_subport == 0 ||
 505             !rte_is_power_of_2(params->n_pipes_per_subport)) {
 506                 RTE_LOG(ERR, SCHED,
 507                         "%s: Incorrect value for maximum pipes number\n", __func__);
 508                 return -EINVAL;
 509         }
 510
 511         return 0;
 512 }
 513
 514 static uint32_t
 515 rte_sched_subport_get_array_base(struct rte_sched_subport_params *params,
 516         enum rte_sched_subport_array array)
 517 {
 518         uint32_t n_pipes_per_subport = params->n_pipes_per_subport_enabled;
 519         uint32_t n_subport_pipe_queues =
 520                 RTE_SCHED_QUEUES_PER_PIPE * n_pipes_per_subport;
 521
 522         uint32_t size_pipe = n_pipes_per_subport * sizeof(struct rte_sched_pipe);
 523         uint32_t size_queue =
 524                 n_subport_pipe_queues * sizeof(struct rte_sched_queue);
 525         uint32_t size_queue_extra
 526                 = n_subport_pipe_queues * sizeof(struct rte_sched_queue_extra);
 527         uint32_t size_pipe_profiles = params->n_max_pipe_profiles *
 528                 sizeof(struct rte_sched_pipe_profile);
 529         uint32_t size_bmp_array =
 530                 rte_bitmap_get_memory_footprint(n_subport_pipe_queues);
 531         uint32_t size_per_pipe_queue_array, size_queue_array;
 532
 533         uint32_t base, i;
 534
 535         size_per_pipe_queue_array = 0;
 536         for (i = 0; i < RTE_SCHED_TRAFFIC_CLASSES_PER_PIPE; i++) {
 537                 if (i < RTE_SCHED_TRAFFIC_CLASS_BE)
 538                         size_per_pipe_queue_array +=
 539                                 params->qsize[i] * sizeof(struct rte_mbuf *);
 540                 else
 541                         size_per_pipe_queue_array += RTE_SCHED_MAX_QUEUES_PER_TC *
 542                                 params->qsize[i] * sizeof(struct rte_mbuf *);
 543         }
 544         size_queue_array = n_pipes_per_subport * size_per_pipe_queue_array;
 545
 546         base = 0;
 547
 548         if (array == e_RTE_SCHED_SUBPORT_ARRAY_PIPE)
 549                 return base;
 550         base += RTE_CACHE_LINE_ROUNDUP(size_pipe);
 551
 552         if (array == e_RTE_SCHED_SUBPORT_ARRAY_QUEUE)
 553                 return base;
 554         base += RTE_CACHE_LINE_ROUNDUP(size_queue);
 555
 556         if (array == e_RTE_SCHED_SUBPORT_ARRAY_QUEUE_EXTRA)
 557                 return base;
 558         base += RTE_CACHE_LINE_ROUNDUP(size_queue_extra);
 559
 560         if (array == e_RTE_SCHED_SUBPORT_ARRAY_PIPE_PROFILES)
 561                 return base;
 562         base += RTE_CACHE_LINE_ROUNDUP(size_pipe_profiles);
 563
 564         if (array == e_RTE_SCHED_SUBPORT_ARRAY_BMP_ARRAY)
 565                 return base;
 566         base += RTE_CACHE_LINE_ROUNDUP(size_bmp_array);
 567
 568         if (array == e_RTE_SCHED_SUBPORT_ARRAY_QUEUE_ARRAY)
 569                 return base;
 570         base += RTE_CACHE_LINE_ROUNDUP(size_queue_array);
 571
 572         return base;
 573 }
 574
 575 static void
 576 rte_sched_subport_config_qsize(struct rte_sched_subport *subport)
 577 {
 578         uint32_t i;
 579
 580         subport->qsize_add[0] = 0;
 581
 582         /* Strict prority traffic class */
 583         for (i = 1; i < RTE_SCHED_TRAFFIC_CLASSES_PER_PIPE; i++)
 584                 subport->qsize_add[i] = subport->qsize_add[i-1] + subport->qsize[i-1];
 585
 586         /* Best-effort traffic class */
 587         subport->qsize_add[RTE_SCHED_TRAFFIC_CLASS_BE + 1] =
 588                 subport->qsize_add[RTE_SCHED_TRAFFIC_CLASS_BE] +
 589                 subport->qsize[RTE_SCHED_TRAFFIC_CLASS_BE];
 590         subport->qsize_add[RTE_SCHED_TRAFFIC_CLASS_BE + 2] =
 591                 subport->qsize_add[RTE_SCHED_TRAFFIC_CLASS_BE + 1] +
 592                 subport->qsize[RTE_SCHED_TRAFFIC_CLASS_BE];
 593         subport->qsize_add[RTE_SCHED_TRAFFIC_CLASS_BE + 3] =
 594                 subport->qsize_add[RTE_SCHED_TRAFFIC_CLASS_BE + 2] +
 595                 subport->qsize[RTE_SCHED_TRAFFIC_CLASS_BE];
 596
 597         subport->qsize_sum = subport->qsize_add[RTE_SCHED_TRAFFIC_CLASS_BE + 3] +
 598                 subport->qsize[RTE_SCHED_TRAFFIC_CLASS_BE];
 599 }
 600
 601 static void
 602 rte_sched_port_log_pipe_profile(struct rte_sched_subport *subport, uint32_t i)
 603 {
 604         struct rte_sched_pipe_profile *p = subport->pipe_profiles + i;
 605
 606         RTE_LOG(DEBUG, SCHED, "Low level config for pipe profile %u:\n"
 607                 "       Token bucket: period = %"PRIu64", credits per period = %"PRIu64", size = %"PRIu64"\n"
 608                 "       Traffic classes: period = %"PRIu64",\n"
 609                 "       credits per period = [%"PRIu64", %"PRIu64", %"PRIu64", %"PRIu64
 610                 ", %"PRIu64", %"PRIu64", %"PRIu64", %"PRIu64", %"PRIu64", %"PRIu64
 611                 ", %"PRIu64", %"PRIu64", %"PRIu64"]\n"
 612                 "       Best-effort traffic class oversubscription: weight = %hhu\n"
 613                 "       WRR cost: [%hhu, %hhu, %hhu, %hhu]\n",
 614                 i,
 615
 616                 /* Token bucket */
 617                 p->tb_period,
 618                 p->tb_credits_per_period,
 619                 p->tb_size,
 620
 621                 /* Traffic classes */
 622                 p->tc_period,
 623                 p->tc_credits_per_period[0],
 624                 p->tc_credits_per_period[1],
 625                 p->tc_credits_per_period[2],
 626                 p->tc_credits_per_period[3],
 627                 p->tc_credits_per_period[4],
 628                 p->tc_credits_per_period[5],
 629                 p->tc_credits_per_period[6],
 630                 p->tc_credits_per_period[7],
 631                 p->tc_credits_per_period[8],
 632                 p->tc_credits_per_period[9],
 633                 p->tc_credits_per_period[10],
 634                 p->tc_credits_per_period[11],
 635                 p->tc_credits_per_period[12],
 636
 637                 /* Best-effort traffic class oversubscription */
 638                 p->tc_ov_weight,
 639
 640                 /* WRR */
 641                 p->wrr_cost[0], p->wrr_cost[1], p->wrr_cost[2], p->wrr_cost[3]);
 642 }
 643
 644 static void
 645 rte_sched_port_log_subport_profile(struct rte_sched_port *port, uint32_t i)
 646 {
 647         struct rte_sched_subport_profile *p = port->subport_profiles + i;
 648
 649         RTE_LOG(DEBUG, SCHED, "Low level config for subport profile %u:\n"
 650         "Token bucket: period = %"PRIu64", credits per period = %"PRIu64","
 651         "size = %"PRIu64"\n"
 652         "Traffic classes: period = %"PRIu64",\n"
 653         "credits per period = [%"PRIu64", %"PRIu64", %"PRIu64", %"PRIu64
 654         " %"PRIu64", %"PRIu64", %"PRIu64", %"PRIu64", %"PRIu64", %"PRIu64
 655         " %"PRIu64", %"PRIu64", %"PRIu64"]\n",
 656         i,
 657
 658         /* Token bucket */
 659         p->tb_period,
 660         p->tb_credits_per_period,
 661         p->tb_size,
 662
 663         /* Traffic classes */
 664         p->tc_period,
 665         p->tc_credits_per_period[0],
 666         p->tc_credits_per_period[1],
 667         p->tc_credits_per_period[2],
 668         p->tc_credits_per_period[3],
 669         p->tc_credits_per_period[4],
 670         p->tc_credits_per_period[5],
 671         p->tc_credits_per_period[6],
 672         p->tc_credits_per_period[7],
 673         p->tc_credits_per_period[8],
 674         p->tc_credits_per_period[9],
 675         p->tc_credits_per_period[10],
 676         p->tc_credits_per_period[11],
 677         p->tc_credits_per_period[12]);
 678 }
 679
 680 static inline uint64_t
 681 rte_sched_time_ms_to_bytes(uint64_t time_ms, uint64_t rate)
 682 {
 683         uint64_t time = time_ms;
 684
 685         time = (time * rate) / 1000;
 686
 687         return time;
 688 }
 689
 690 static void
 691 rte_sched_pipe_profile_convert(struct rte_sched_subport *subport,
 692         struct rte_sched_pipe_params *src,
 693         struct rte_sched_pipe_profile *dst,
 694         uint64_t rate)
 695 {
 696         uint32_t wrr_cost[RTE_SCHED_BE_QUEUES_PER_PIPE];
 697         uint32_t lcd1, lcd2, lcd;
 698         uint32_t i;
 699
 700         /* Token Bucket */
 701         if (src->tb_rate == rate) {
 702                 dst->tb_credits_per_period = 1;
 703                 dst->tb_period = 1;
 704         } else {
 705                 double tb_rate = (double) src->tb_rate
 706                                 / (double) rate;
 707                 double d = RTE_SCHED_TB_RATE_CONFIG_ERR;
 708
 709                 rte_approx_64(tb_rate, d, &dst->tb_credits_per_period,
 710                         &dst->tb_period);
 711         }
 712
 713         dst->tb_size = src->tb_size;
 714
 715         /* Traffic Classes */
 716         dst->tc_period = rte_sched_time_ms_to_bytes(src->tc_period,
 717                                                 rate);
 718
 719         for (i = 0; i < RTE_SCHED_TRAFFIC_CLASSES_PER_PIPE; i++)
 720                 if (subport->qsize[i])
 721                         dst->tc_credits_per_period[i]
 722                                 = rte_sched_time_ms_to_bytes(src->tc_period,
 723                                         src->tc_rate[i]);
 724
 725         dst->tc_ov_weight = src->tc_ov_weight;
 726
 727         /* WRR queues */
 728         wrr_cost[0] = src->wrr_weights[0];
 729         wrr_cost[1] = src->wrr_weights[1];
 730         wrr_cost[2] = src->wrr_weights[2];
 731         wrr_cost[3] = src->wrr_weights[3];
 732
 733         lcd1 = rte_get_lcd(wrr_cost[0], wrr_cost[1]);
 734         lcd2 = rte_get_lcd(wrr_cost[2], wrr_cost[3]);
 735         lcd = rte_get_lcd(lcd1, lcd2);
 736
 737         wrr_cost[0] = lcd / wrr_cost[0];
 738         wrr_cost[1] = lcd / wrr_cost[1];
 739         wrr_cost[2] = lcd / wrr_cost[2];
 740         wrr_cost[3] = lcd / wrr_cost[3];
 741
 742         dst->wrr_cost[0] = (uint8_t) wrr_cost[0];
 743         dst->wrr_cost[1] = (uint8_t) wrr_cost[1];
 744         dst->wrr_cost[2] = (uint8_t) wrr_cost[2];
 745         dst->wrr_cost[3] = (uint8_t) wrr_cost[3];
 746 }
 747
 748 static void
 749 rte_sched_subport_profile_convert(struct rte_sched_subport_profile_params *src,
 750         struct rte_sched_subport_profile *dst,
 751         uint64_t rate)
 752 {
 753         uint32_t i;
 754
 755         /* Token Bucket */
 756         if (src->tb_rate == rate) {
 757                 dst->tb_credits_per_period = 1;
 758                 dst->tb_period = 1;
 759         } else {
 760                 double tb_rate = (double) src->tb_rate
 761                                 / (double) rate;
 762                 double d = RTE_SCHED_TB_RATE_CONFIG_ERR;
 763
 764                 rte_approx_64(tb_rate, d, &dst->tb_credits_per_period,
 765                         &dst->tb_period);
 766         }
 767
 768         dst->tb_size = src->tb_size;
 769
 770         /* Traffic Classes */
 771         dst->tc_period = rte_sched_time_ms_to_bytes(src->tc_period, rate);
 772
 773         for (i = 0; i < RTE_SCHED_TRAFFIC_CLASSES_PER_PIPE; i++)
 774                 dst->tc_credits_per_period[i]
 775                         = rte_sched_time_ms_to_bytes(src->tc_period,
 776                                 src->tc_rate[i]);
 777 }
 778
 779 static void
 780 rte_sched_subport_config_pipe_profile_table(struct rte_sched_subport *subport,
 781         struct rte_sched_subport_params *params, uint64_t rate)
 782 {
 783         uint32_t i;
 784
 785         for (i = 0; i < subport->n_pipe_profiles; i++) {
 786                 struct rte_sched_pipe_params *src = params->pipe_profiles + i;
 787                 struct rte_sched_pipe_profile *dst = subport->pipe_profiles + i;
 788
 789                 rte_sched_pipe_profile_convert(subport, src, dst, rate);
 790                 rte_sched_port_log_pipe_profile(subport, i);
 791         }
 792
 793         subport->pipe_tc_be_rate_max = 0;
 794         for (i = 0; i < subport->n_pipe_profiles; i++) {
 795                 struct rte_sched_pipe_params *src = params->pipe_profiles + i;
 796                 uint64_t pipe_tc_be_rate = src->tc_rate[RTE_SCHED_TRAFFIC_CLASS_BE];
 797
 798                 if (subport->pipe_tc_be_rate_max < pipe_tc_be_rate)
 799                         subport->pipe_tc_be_rate_max = pipe_tc_be_rate;
 800         }
 801 }
 802
 803 static void
 804 rte_sched_port_config_subport_profile_table(struct rte_sched_port *port,
 805         struct rte_sched_port_params *params,
 806         uint64_t rate)
 807 {
 808         uint32_t i;
 809
 810         for (i = 0; i < port->n_subport_profiles; i++) {
 811                 struct rte_sched_subport_profile_params *src
 812                                 = params->subport_profiles + i;
 813                 struct rte_sched_subport_profile *dst
 814                                 = port->subport_profiles + i;
 815
 816                 rte_sched_subport_profile_convert(src, dst, rate);
 817                 rte_sched_port_log_subport_profile(port, i);
 818         }
 819 }
 820
 821 static int
 822 rte_sched_subport_check_params(struct rte_sched_subport_params *params,
 823         uint32_t n_max_pipes_per_subport,
 824         uint64_t rate)
 825 {
 826         uint32_t i;
 827
 828         /* Check user parameters */
 829         if (params == NULL) {
 830                 RTE_LOG(ERR, SCHED,
 831                         "%s: Incorrect value for parameter params\n", __func__);
 832                 return -EINVAL;
 833         }
 834
 835         /* qsize: if non-zero, power of 2,
 836          * no bigger than 32K (due to 16-bit read/write pointers)
 837          */
 838         for (i = 0; i < RTE_SCHED_TRAFFIC_CLASSES_PER_PIPE; i++) {
 839                 uint16_t qsize = params->qsize[i];
 840
 841                 if (qsize != 0 && !rte_is_power_of_2(qsize)) {
 842                         RTE_LOG(ERR, SCHED,
 843                                 "%s: Incorrect value for qsize\n", __func__);
 844                         return -EINVAL;
 845                 }
 846         }
 847
 848         if (params->qsize[RTE_SCHED_TRAFFIC_CLASS_BE] == 0) {
 849                 RTE_LOG(ERR, SCHED, "%s: Incorrect qsize\n", __func__);
 850                 return -EINVAL;
 851         }
 852
 853         /* n_pipes_per_subport: non-zero, power of 2 */
 854         if (params->n_pipes_per_subport_enabled == 0 ||
 855                 params->n_pipes_per_subport_enabled > n_max_pipes_per_subport ||
 856             !rte_is_power_of_2(params->n_pipes_per_subport_enabled)) {
 857                 RTE_LOG(ERR, SCHED,
 858                         "%s: Incorrect value for pipes number\n", __func__);
 859                 return -EINVAL;
 860         }
 861
 862         /* pipe_profiles and n_pipe_profiles */
 863         if (params->pipe_profiles == NULL ||
 864             params->n_pipe_profiles == 0 ||
 865                 params->n_max_pipe_profiles == 0 ||
 866                 params->n_pipe_profiles > params->n_max_pipe_profiles) {
 867                 RTE_LOG(ERR, SCHED,
 868                         "%s: Incorrect value for pipe profiles\n", __func__);
 869                 return -EINVAL;
 870         }
 871
 872         for (i = 0; i < params->n_pipe_profiles; i++) {
 873                 struct rte_sched_pipe_params *p = params->pipe_profiles + i;
 874                 int status;
 875
 876                 status = pipe_profile_check(p, rate, &params->qsize[0]);
 877                 if (status != 0) {
 878                         RTE_LOG(ERR, SCHED,
 879                                 "%s: Pipe profile check failed(%d)\n", __func__, status);
 880                         return -EINVAL;
 881                 }
 882         }
 883
 884         return 0;
 885 }
 886
 887 uint32_t
 888 rte_sched_port_get_memory_footprint(struct rte_sched_port_params *port_params,
 889         struct rte_sched_subport_params **subport_params)
 890 {
 891         uint32_t size0 = 0, size1 = 0, i;
 892         int status;
 893
 894         status = rte_sched_port_check_params(port_params);
 895         if (status != 0) {
 896                 RTE_LOG(ERR, SCHED,
 897                         "%s: Port scheduler port params check failed (%d)\n",
 898                         __func__, status);
 899
 900                 return 0;
 901         }
 902
 903         for (i = 0; i < port_params->n_subports_per_port; i++) {
 904                 struct rte_sched_subport_params *sp = subport_params[i];
 905
 906                 status = rte_sched_subport_check_params(sp,
 907                                 port_params->n_pipes_per_subport,
 908                                 port_params->rate);
 909                 if (status != 0) {
 910                         RTE_LOG(ERR, SCHED,
 911                                 "%s: Port scheduler subport params check failed (%d)\n",
 912                                 __func__, status);
 913
 914                         return 0;
 915                 }
 916         }
 917
 918         size0 = sizeof(struct rte_sched_port);
 919
 920         for (i = 0; i < port_params->n_subports_per_port; i++) {
 921                 struct rte_sched_subport_params *sp = subport_params[i];
 922
 923                 size1 += rte_sched_subport_get_array_base(sp,
 924                                         e_RTE_SCHED_SUBPORT_ARRAY_TOTAL);
 925         }
 926
 927         return size0 + size1;
 928 }
 929
 930 struct rte_sched_port *
 931 rte_sched_port_config(struct rte_sched_port_params *params)
 932 {
 933         struct rte_sched_port *port = NULL;
 934         uint32_t size0, size1, size2;
 935         uint32_t cycles_per_byte;
 936         uint32_t i, j;
 937         int status;
 938
 939         status = rte_sched_port_check_params(params);
 940         if (status != 0) {
 941                 RTE_LOG(ERR, SCHED,
 942                         "%s: Port scheduler params check failed (%d)\n",
 943                         __func__, status);
 944                 return NULL;
 945         }
 946
 947         size0 = sizeof(struct rte_sched_port);
 948         size1 = params->n_subports_per_port * sizeof(struct rte_sched_subport *);
 949         size2 = params->n_max_subport_profiles *
 950                 sizeof(struct rte_sched_subport_profile);
 951
 952         /* Allocate memory to store the data structures */
 953         port = rte_zmalloc_socket("qos_params", size0 + size1,
 954                                  RTE_CACHE_LINE_SIZE, params->socket);
 955         if (port == NULL) {
 956                 RTE_LOG(ERR, SCHED, "%s: Memory allocation fails\n", __func__);
 957
 958                 return NULL;
 959         }
 960
 961         /* Allocate memory to store the subport profile */
 962         port->subport_profiles  = rte_zmalloc_socket("subport_profile", size2,
 963                                         RTE_CACHE_LINE_SIZE, params->socket);
 964         if (port == NULL) {
 965                 RTE_LOG(ERR, SCHED, "%s: Memory allocation fails\n", __func__);
 966
 967                 return NULL;
 968         }
 969
 970         /* User parameters */
 971         port->n_subports_per_port = params->n_subports_per_port;
 972         port->n_subport_profiles = params->n_subport_profiles;
 973         port->n_max_subport_profiles = params->n_max_subport_profiles;
 974         port->n_pipes_per_subport = params->n_pipes_per_subport;
 975         port->n_pipes_per_subport_log2 =
 976                         __builtin_ctz(params->n_pipes_per_subport);
 977         port->socket = params->socket;
 978
 979         for (i = 0; i < RTE_SCHED_TRAFFIC_CLASSES_PER_PIPE; i++)
 980                 port->pipe_queue[i] = i;
 981
 982         for (i = 0, j = 0; i < RTE_SCHED_QUEUES_PER_PIPE; i++) {
 983                 port->pipe_tc[i] = j;
 984
 985                 if (j < RTE_SCHED_TRAFFIC_CLASS_BE)
 986                         j++;
 987         }
 988
 989         for (i = 0, j = 0; i < RTE_SCHED_QUEUES_PER_PIPE; i++) {
 990                 port->tc_queue[i] = j;
 991
 992                 if (i >= RTE_SCHED_TRAFFIC_CLASS_BE)
 993                         j++;
 994         }
 995         port->rate = params->rate;
 996         port->mtu = params->mtu + params->frame_overhead;
 997         port->frame_overhead = params->frame_overhead;
 998
 999         /* Timing */
1000         port->time_cpu_cycles = rte_get_tsc_cycles();
1001         port->time_cpu_bytes = 0;
1002         port->time = 0;
1003
1004         /* Subport profile table */
1005         rte_sched_port_config_subport_profile_table(port, params, port->rate);
1006
1007         cycles_per_byte = (rte_get_tsc_hz() << RTE_SCHED_TIME_SHIFT)
1008                 / params->rate;
1009         port->inv_cycles_per_byte = rte_reciprocal_value(cycles_per_byte);
1010         port->cycles_per_byte = cycles_per_byte;
1011
1012         /* Grinders */
1013         port->pkts_out = NULL;
1014         port->n_pkts_out = 0;
1015         port->subport_id = 0;
1016
1017         return port;
1018 }
1019
1020 static inline void
1021 rte_sched_subport_free(struct rte_sched_port *port,
1022         struct rte_sched_subport *subport)
1023 {
1024         uint32_t n_subport_pipe_queues;
1025         uint32_t qindex;
1026
1027         if (subport == NULL)
1028                 return;
1029
1030         n_subport_pipe_queues = rte_sched_subport_pipe_queues(subport);
1031
1032         /* Free enqueued mbufs */
1033         for (qindex = 0; qindex < n_subport_pipe_queues; qindex++) {
1034                 struct rte_mbuf **mbufs =
1035                         rte_sched_subport_pipe_qbase(subport, qindex);
1036                 uint16_t qsize = rte_sched_subport_pipe_qsize(port, subport, qindex);
1037                 if (qsize != 0) {
1038                         struct rte_sched_queue *queue = subport->queue + qindex;
1039                         uint16_t qr = queue->qr & (qsize - 1);
1040                         uint16_t qw = queue->qw & (qsize - 1);
1041
1042                         for (; qr != qw; qr = (qr + 1) & (qsize - 1))
1043                                 rte_pktmbuf_free(mbufs[qr]);
1044                 }
1045         }
1046
1047         rte_free(subport);
1048 }
1049
1050 void
1051 rte_sched_port_free(struct rte_sched_port *port)
1052 {
1053         uint32_t i;
1054
1055         /* Check user parameters */
1056         if (port == NULL)
1057                 return;
1058
1059         for (i = 0; i < port->n_subports_per_port; i++)
1060                 rte_sched_subport_free(port, port->subports[i]);
1061
1062         rte_free(port->subport_profiles);
1063         rte_free(port);
1064 }
1065
1066 static void
1067 rte_sched_free_memory(struct rte_sched_port *port, uint32_t n_subports)
1068 {
1069         uint32_t i;
1070
1071         for (i = 0; i < n_subports; i++) {
1072                 struct rte_sched_subport *subport = port->subports[i];
1073
1074                 rte_sched_subport_free(port, subport);
1075         }
1076
1077         rte_free(port->subport_profiles);
1078         rte_free(port);
1079 }
1080
1081 int
1082 rte_sched_subport_config(struct rte_sched_port *port,
1083         uint32_t subport_id,
1084         struct rte_sched_subport_params *params,
1085         uint32_t subport_profile_id)
1086 {
1087         struct rte_sched_subport *s = NULL;
1088         uint32_t n_subports = subport_id;
1089         struct rte_sched_subport_profile *profile;
1090         uint32_t n_subport_pipe_queues, i;
1091         uint32_t size0, size1, bmp_mem_size;
1092         int status;
1093
1094         /* Check user parameters */
1095         if (port == NULL) {
1096                 RTE_LOG(ERR, SCHED,
1097                         "%s: Incorrect value for parameter port\n", __func__);
1098                 return 0;
1099         }
1100
1101         if (subport_id >= port->n_subports_per_port) {
1102                 RTE_LOG(ERR, SCHED,
1103                         "%s: Incorrect value for subport id\n", __func__);
1104
1105                 rte_sched_free_memory(port, n_subports);
1106                 return -EINVAL;
1107         }
1108
1109         if (subport_profile_id >= port->n_max_subport_profiles) {
1110                 RTE_LOG(ERR, SCHED, "%s: "
1111                         "Number of subport profile exceeds the max limit\n",
1112                         __func__);
1113                 rte_sched_free_memory(port, n_subports);
1114                 return -EINVAL;
1115         }
1116
1117         /** Memory is allocated only on first invocation of the api for a
1118          * given subport. Subsequent invocation on same subport will just
1119          * update subport bandwidth parameter.
1120          **/
1121         if (port->subports[subport_id] == NULL) {
1122
1123                 status = rte_sched_subport_check_params(params,
1124                         port->n_pipes_per_subport,
1125                         port->rate);
1126                 if (status != 0) {
1127                         RTE_LOG(NOTICE, SCHED,
1128                                 "%s: Port scheduler params check failed (%d)\n",
1129                                 __func__, status);
1130
1131                         rte_sched_free_memory(port, n_subports);
1132                         return -EINVAL;
1133                 }
1134
1135                 /* Determine the amount of memory to allocate */
1136                 size0 = sizeof(struct rte_sched_subport);
1137                 size1 = rte_sched_subport_get_array_base(params,
1138                                         e_RTE_SCHED_SUBPORT_ARRAY_TOTAL);
1139
1140                 /* Allocate memory to store the data structures */
1141                 s = rte_zmalloc_socket("subport_params", size0 + size1,
1142                         RTE_CACHE_LINE_SIZE, port->socket);
1143                 if (s == NULL) {
1144                         RTE_LOG(ERR, SCHED,
1145                                 "%s: Memory allocation fails\n", __func__);
1146
1147                         rte_sched_free_memory(port, n_subports);
1148                         return -ENOMEM;
1149                 }
1150
1151                 n_subports++;
1152
1153                 subport_profile_id = 0;
1154
1155                 /* Port */
1156                 port->subports[subport_id] = s;
1157
1158                 s->tb_time = port->time;
1159
1160                 /* compile time checks */
1161                 RTE_BUILD_BUG_ON(RTE_SCHED_PORT_N_GRINDERS == 0);
1162                 RTE_BUILD_BUG_ON(RTE_SCHED_PORT_N_GRINDERS &
1163                         (RTE_SCHED_PORT_N_GRINDERS - 1));
1164
1165                 /* User parameters */
1166                 s->n_pipes_per_subport_enabled =
1167                                 params->n_pipes_per_subport_enabled;
1168                 memcpy(s->qsize, params->qsize, sizeof(params->qsize));
1169                 s->n_pipe_profiles = params->n_pipe_profiles;
1170                 s->n_max_pipe_profiles = params->n_max_pipe_profiles;
1171
1172 #ifdef RTE_SCHED_RED
1173                 for (i = 0; i < RTE_SCHED_TRAFFIC_CLASSES_PER_PIPE; i++) {
1174                         uint32_t j;
1175
1176                         for (j = 0; j < RTE_COLORS; j++) {
1177                         /* if min/max are both zero, then RED is disabled */
1178                                 if ((params->red_params[i][j].min_th |
1179                                      params->red_params[i][j].max_th) == 0) {
1180                                         continue;
1181                                 }
1182
1183                                 if (rte_red_config_init(&s->red_config[i][j],
1184                                     params->red_params[i][j].wq_log2,
1185                                     params->red_params[i][j].min_th,
1186                                     params->red_params[i][j].max_th,
1187                                     params->red_params[i][j].maxp_inv) != 0) {
1188                                         rte_sched_free_memory(port, n_subports);
1189
1190                                         RTE_LOG(NOTICE, SCHED,
1191                                         "%s: RED configuration init fails\n",
1192                                         __func__);
1193                                         return -EINVAL;
1194                                 }
1195                         }
1196                 }
1197 #endif
1198
1199                 /* Scheduling loop detection */
1200                 s->pipe_loop = RTE_SCHED_PIPE_INVALID;
1201                 s->pipe_exhaustion = 0;
1202
1203                 /* Grinders */
1204                 s->busy_grinders = 0;
1205
1206                 /* Queue base calculation */
1207                 rte_sched_subport_config_qsize(s);
1208
1209                 /* Large data structures */
1210                 s->pipe = (struct rte_sched_pipe *)
1211                         (s->memory + rte_sched_subport_get_array_base(params,
1212                         e_RTE_SCHED_SUBPORT_ARRAY_PIPE));
1213                 s->queue = (struct rte_sched_queue *)
1214                         (s->memory + rte_sched_subport_get_array_base(params,
1215                         e_RTE_SCHED_SUBPORT_ARRAY_QUEUE));
1216                 s->queue_extra = (struct rte_sched_queue_extra *)
1217                         (s->memory + rte_sched_subport_get_array_base(params,
1218                         e_RTE_SCHED_SUBPORT_ARRAY_QUEUE_EXTRA));
1219                 s->pipe_profiles = (struct rte_sched_pipe_profile *)
1220                         (s->memory + rte_sched_subport_get_array_base(params,
1221                         e_RTE_SCHED_SUBPORT_ARRAY_PIPE_PROFILES));
1222                 s->bmp_array =  s->memory + rte_sched_subport_get_array_base(
1223                                 params, e_RTE_SCHED_SUBPORT_ARRAY_BMP_ARRAY);
1224                 s->queue_array = (struct rte_mbuf **)
1225                         (s->memory + rte_sched_subport_get_array_base(params,
1226                         e_RTE_SCHED_SUBPORT_ARRAY_QUEUE_ARRAY));
1227
1228                 /* Pipe profile table */
1229                 rte_sched_subport_config_pipe_profile_table(s, params,
1230                                                             port->rate);
1231
1232                 /* Bitmap */
1233                 n_subport_pipe_queues = rte_sched_subport_pipe_queues(s);
1234                 bmp_mem_size = rte_bitmap_get_memory_footprint(
1235                                                 n_subport_pipe_queues);
1236                 s->bmp = rte_bitmap_init(n_subport_pipe_queues, s->bmp_array,
1237                                         bmp_mem_size);
1238                 if (s->bmp == NULL) {
1239                         RTE_LOG(ERR, SCHED,
1240                                 "%s: Subport bitmap init error\n", __func__);
1241
1242                         rte_sched_free_memory(port, n_subports);
1243                         return -EINVAL;
1244                 }
1245
1246                 for (i = 0; i < RTE_SCHED_PORT_N_GRINDERS; i++)
1247                         s->grinder_base_bmp_pos[i] = RTE_SCHED_PIPE_INVALID;
1248
1249 #ifdef RTE_SCHED_SUBPORT_TC_OV
1250                 /* TC oversubscription */
1251                 s->tc_ov_wm_min = port->mtu;
1252                 s->tc_ov_period_id = 0;
1253                 s->tc_ov = 0;
1254                 s->tc_ov_n = 0;
1255                 s->tc_ov_rate = 0;
1256 #endif
1257         }
1258
1259         {
1260         /* update subport parameters from subport profile table*/
1261                 profile = port->subport_profiles + subport_profile_id;
1262
1263                 s = port->subports[subport_id];
1264
1265                 s->tb_credits = profile->tb_size / 2;
1266
1267                 s->tc_time = port->time + profile->tc_period;
1268
1269                 for (i = 0; i < RTE_SCHED_TRAFFIC_CLASSES_PER_PIPE; i++)
1270                         if (s->qsize[i])
1271                                 s->tc_credits[i] =
1272                                         profile->tc_credits_per_period[i];
1273                         else
1274                                 profile->tc_credits_per_period[i] = 0;
1275
1276 #ifdef RTE_SCHED_SUBPORT_TC_OV
1277                 s->tc_ov_wm_max = rte_sched_time_ms_to_bytes(profile->tc_period,
1278                                                         s->pipe_tc_be_rate_max);
1279                 s->tc_ov_wm = s->tc_ov_wm_max;
1280 #endif
1281                 s->profile = subport_profile_id;
1282
1283         }
1284
1285         rte_sched_port_log_subport_profile(port, subport_profile_id);
1286
1287         return 0;
1288 }
1289
1290 int
1291 rte_sched_pipe_config(struct rte_sched_port *port,
1292         uint32_t subport_id,
1293         uint32_t pipe_id,
1294         int32_t pipe_profile)
1295 {
1296         struct rte_sched_subport *s;
1297         struct rte_sched_subport_profile *sp;
1298         struct rte_sched_pipe *p;
1299         struct rte_sched_pipe_profile *params;
1300         uint32_t n_subports = subport_id + 1;
1301         uint32_t deactivate, profile, i;
1302
1303         /* Check user parameters */
1304         profile = (uint32_t) pipe_profile;
1305         deactivate = (pipe_profile < 0);
1306
1307         if (port == NULL) {
1308                 RTE_LOG(ERR, SCHED,
1309                         "%s: Incorrect value for parameter port\n", __func__);
1310                 return -EINVAL;
1311         }
1312
1313         if (subport_id >= port->n_subports_per_port) {
1314                 RTE_LOG(ERR, SCHED,
1315                         "%s: Incorrect value for parameter subport id\n", __func__);
1316
1317                 rte_sched_free_memory(port, n_subports);
1318                 return -EINVAL;
1319         }
1320
1321         s = port->subports[subport_id];
1322         if (pipe_id >= s->n_pipes_per_subport_enabled) {
1323                 RTE_LOG(ERR, SCHED,
1324                         "%s: Incorrect value for parameter pipe id\n", __func__);
1325
1326                 rte_sched_free_memory(port, n_subports);
1327                 return -EINVAL;
1328         }
1329
1330         if (!deactivate && profile >= s->n_pipe_profiles) {
1331                 RTE_LOG(ERR, SCHED,
1332                         "%s: Incorrect value for parameter pipe profile\n", __func__);
1333
1334                 rte_sched_free_memory(port, n_subports);
1335                 return -EINVAL;
1336         }
1337
1338         sp = port->subport_profiles + s->profile;
1339         /* Handle the case when pipe already has a valid configuration */
1340         p = s->pipe + pipe_id;
1341         if (p->tb_time) {
1342                 params = s->pipe_profiles + p->profile;
1343
1344                 double subport_tc_be_rate =
1345                 (double)sp->tc_credits_per_period[RTE_SCHED_TRAFFIC_CLASS_BE]
1346                         / (double) sp->tc_period;
1347                 double pipe_tc_be_rate =
1348                         (double) params->tc_credits_per_period[RTE_SCHED_TRAFFIC_CLASS_BE]
1349                         / (double) params->tc_period;
1350                 uint32_t tc_be_ov = s->tc_ov;
1351
1352                 /* Unplug pipe from its subport */
1353                 s->tc_ov_n -= params->tc_ov_weight;
1354                 s->tc_ov_rate -= pipe_tc_be_rate;
1355                 s->tc_ov = s->tc_ov_rate > subport_tc_be_rate;
1356
1357                 if (s->tc_ov != tc_be_ov) {
1358                         RTE_LOG(DEBUG, SCHED,
1359                                 "Subport %u Best-effort TC oversubscription is OFF (%.4lf >= %.4lf)\n",
1360                                 subport_id, subport_tc_be_rate, s->tc_ov_rate);
1361                 }
1362
1363                 /* Reset the pipe */
1364                 memset(p, 0, sizeof(struct rte_sched_pipe));
1365         }
1366
1367         if (deactivate)
1368                 return 0;
1369
1370         /* Apply the new pipe configuration */
1371         p->profile = profile;
1372         params = s->pipe_profiles + p->profile;
1373
1374         /* Token Bucket (TB) */
1375         p->tb_time = port->time;
1376         p->tb_credits = params->tb_size / 2;
1377
1378         /* Traffic Classes (TCs) */
1379         p->tc_time = port->time + params->tc_period;
1380
1381         for (i = 0; i < RTE_SCHED_TRAFFIC_CLASSES_PER_PIPE; i++)
1382                 if (s->qsize[i])
1383                         p->tc_credits[i] = params->tc_credits_per_period[i];
1384
1385         {
1386                 /* Subport best effort tc oversubscription */
1387                 double subport_tc_be_rate =
1388                 (double)sp->tc_credits_per_period[RTE_SCHED_TRAFFIC_CLASS_BE]
1389                         / (double) sp->tc_period;
1390                 double pipe_tc_be_rate =
1391                         (double) params->tc_credits_per_period[RTE_SCHED_TRAFFIC_CLASS_BE]
1392                         / (double) params->tc_period;
1393                 uint32_t tc_be_ov = s->tc_ov;
1394
1395                 s->tc_ov_n += params->tc_ov_weight;
1396                 s->tc_ov_rate += pipe_tc_be_rate;
1397                 s->tc_ov = s->tc_ov_rate > subport_tc_be_rate;
1398
1399                 if (s->tc_ov != tc_be_ov) {
1400                         RTE_LOG(DEBUG, SCHED,
1401                                 "Subport %u Best effort TC oversubscription is ON (%.4lf < %.4lf)\n",
1402                                 subport_id, subport_tc_be_rate, s->tc_ov_rate);
1403                 }
1404                 p->tc_ov_period_id = s->tc_ov_period_id;
1405                 p->tc_ov_credits = s->tc_ov_wm;
1406         }
1407
1408         return 0;
1409 }
1410
1411 int
1412 rte_sched_subport_pipe_profile_add(struct rte_sched_port *port,
1413         uint32_t subport_id,
1414         struct rte_sched_pipe_params *params,
1415         uint32_t *pipe_profile_id)
1416 {
1417         struct rte_sched_subport *s;
1418         struct rte_sched_pipe_profile *pp;
1419         uint32_t i;
1420         int status;
1421
1422         /* Port */
1423         if (port == NULL) {
1424                 RTE_LOG(ERR, SCHED,
1425                         "%s: Incorrect value for parameter port\n", __func__);
1426                 return -EINVAL;
1427         }
1428
1429         /* Subport id not exceeds the max limit */
1430         if (subport_id > port->n_subports_per_port) {
1431                 RTE_LOG(ERR, SCHED,
1432                         "%s: Incorrect value for subport id\n", __func__);
1433                 return -EINVAL;
1434         }
1435
1436         s = port->subports[subport_id];
1437
1438         /* Pipe profiles exceeds the max limit */
1439         if (s->n_pipe_profiles >= s->n_max_pipe_profiles) {
1440                 RTE_LOG(ERR, SCHED,
1441                         "%s: Number of pipe profiles exceeds the max limit\n", __func__);
1442                 return -EINVAL;
1443         }
1444
1445         /* Pipe params */
1446         status = pipe_profile_check(params, port->rate, &s->qsize[0]);
1447         if (status != 0) {
1448                 RTE_LOG(ERR, SCHED,
1449                         "%s: Pipe profile check failed(%d)\n", __func__, status);
1450                 return -EINVAL;
1451         }
1452
1453         pp = &s->pipe_profiles[s->n_pipe_profiles];
1454         rte_sched_pipe_profile_convert(s, params, pp, port->rate);
1455
1456         /* Pipe profile should not exists */
1457         for (i = 0; i < s->n_pipe_profiles; i++)
1458                 if (memcmp(s->pipe_profiles + i, pp, sizeof(*pp)) == 0) {
1459                         RTE_LOG(ERR, SCHED,
1460                                 "%s: Pipe profile exists\n", __func__);
1461                         return -EINVAL;
1462                 }
1463
1464         /* Pipe profile commit */
1465         *pipe_profile_id = s->n_pipe_profiles;
1466         s->n_pipe_profiles++;
1467
1468         if (s->pipe_tc_be_rate_max < params->tc_rate[RTE_SCHED_TRAFFIC_CLASS_BE])
1469                 s->pipe_tc_be_rate_max = params->tc_rate[RTE_SCHED_TRAFFIC_CLASS_BE];
1470
1471         rte_sched_port_log_pipe_profile(s, *pipe_profile_id);
1472
1473         return 0;
1474 }
1475
1476 int
1477 rte_sched_port_subport_profile_add(struct rte_sched_port *port,
1478         struct rte_sched_subport_profile_params *params,
1479         uint32_t *subport_profile_id)
1480 {
1481         int status;
1482         uint32_t i;
1483         struct rte_sched_subport_profile *dst;
1484
1485         /* Port */
1486         if (port == NULL) {
1487                 RTE_LOG(ERR, SCHED, "%s: "
1488                 "Incorrect value for parameter port\n", __func__);
1489                 return -EINVAL;
1490         }
1491
1492         if (params == NULL) {
1493                 RTE_LOG(ERR, SCHED, "%s: "
1494                 "Incorrect value for parameter profile\n", __func__);
1495                 return -EINVAL;
1496         }
1497
1498         if (subport_profile_id == NULL) {
1499                 RTE_LOG(ERR, SCHED, "%s: "
1500                 "Incorrect value for parameter subport_profile_id\n",
1501                 __func__);
1502                 return -EINVAL;
1503         }
1504
1505         dst = port->subport_profiles + port->n_subport_profiles;
1506
1507         /* Subport profiles exceeds the max limit */
1508         if (port->n_subport_profiles >= port->n_max_subport_profiles) {
1509                 RTE_LOG(ERR, SCHED, "%s: "
1510                 "Number of subport profiles exceeds the max limit\n",
1511                  __func__);
1512                 return -EINVAL;
1513         }
1514
1515         status = subport_profile_check(params, port->rate);
1516         if (status != 0) {
1517                 RTE_LOG(ERR, SCHED,
1518                 "%s: subport profile check failed(%d)\n", __func__, status);
1519                 return -EINVAL;
1520         }
1521
1522         rte_sched_subport_profile_convert(params, dst, port->rate);
1523
1524         /* Subport profile should not exists */
1525         for (i = 0; i < port->n_subport_profiles; i++)
1526                 if (memcmp(port->subport_profiles + i,
1527                     dst, sizeof(*dst)) == 0) {
1528                         RTE_LOG(ERR, SCHED,
1529                         "%s: subport profile exists\n", __func__);
1530                         return -EINVAL;
1531                 }
1532
1533         /* Subport profile commit */
1534         *subport_profile_id = port->n_subport_profiles;
1535         port->n_subport_profiles++;
1536
1537         rte_sched_port_log_subport_profile(port, *subport_profile_id);
1538
1539         return 0;
1540 }
1541
1542 static inline uint32_t
1543 rte_sched_port_qindex(struct rte_sched_port *port,
1544         uint32_t subport,
1545         uint32_t pipe,
1546         uint32_t traffic_class,
1547         uint32_t queue)
1548 {
1549         return ((subport & (port->n_subports_per_port - 1)) <<
1550                 (port->n_pipes_per_subport_log2 + 4)) |
1551                 ((pipe &
1552                 (port->subports[subport]->n_pipes_per_subport_enabled - 1)) << 4) |
1553                 ((rte_sched_port_pipe_queue(port, traffic_class) + queue) &
1554                 (RTE_SCHED_QUEUES_PER_PIPE - 1));
1555 }
1556
1557 void
1558 rte_sched_port_pkt_write(struct rte_sched_port *port,
1559                          struct rte_mbuf *pkt,
1560                          uint32_t subport, uint32_t pipe,
1561                          uint32_t traffic_class,
1562                          uint32_t queue, enum rte_color color)
1563 {
1564         uint32_t queue_id =
1565                 rte_sched_port_qindex(port, subport, pipe, traffic_class, queue);
1566
1567         rte_mbuf_sched_set(pkt, queue_id, traffic_class, (uint8_t)color);
1568 }
1569
1570 void
1571 rte_sched_port_pkt_read_tree_path(struct rte_sched_port *port,
1572                                   const struct rte_mbuf *pkt,
1573                                   uint32_t *subport, uint32_t *pipe,
1574                                   uint32_t *traffic_class, uint32_t *queue)
1575 {
1576         uint32_t queue_id = rte_mbuf_sched_queue_get(pkt);
1577
1578         *subport = queue_id >> (port->n_pipes_per_subport_log2 + 4);
1579         *pipe = (queue_id >> 4) &
1580                 (port->subports[*subport]->n_pipes_per_subport_enabled - 1);
1581         *traffic_class = rte_sched_port_pipe_tc(port, queue_id);
1582         *queue = rte_sched_port_tc_queue(port, queue_id);
1583 }
1584
1585 enum rte_color
1586 rte_sched_port_pkt_read_color(const struct rte_mbuf *pkt)
1587 {
1588         return (enum rte_color)rte_mbuf_sched_color_get(pkt);
1589 }
1590
1591 int
1592 rte_sched_subport_read_stats(struct rte_sched_port *port,
1593                              uint32_t subport_id,
1594                              struct rte_sched_subport_stats *stats,
1595                              uint32_t *tc_ov)
1596 {
1597         struct rte_sched_subport *s;
1598
1599         /* Check user parameters */
1600         if (port == NULL) {
1601                 RTE_LOG(ERR, SCHED,
1602                         "%s: Incorrect value for parameter port\n", __func__);
1603                 return -EINVAL;
1604         }
1605
1606         if (subport_id >= port->n_subports_per_port) {
1607                 RTE_LOG(ERR, SCHED,
1608                         "%s: Incorrect value for subport id\n", __func__);
1609                 return -EINVAL;
1610         }
1611
1612         if (stats == NULL) {
1613                 RTE_LOG(ERR, SCHED,
1614                         "%s: Incorrect value for parameter stats\n", __func__);
1615                 return -EINVAL;
1616         }
1617
1618         if (tc_ov == NULL) {
1619                 RTE_LOG(ERR, SCHED,
1620                         "%s: Incorrect value for tc_ov\n", __func__);
1621                 return -EINVAL;
1622         }
1623
1624         s = port->subports[subport_id];
1625
1626         /* Copy subport stats and clear */
1627         memcpy(stats, &s->stats, sizeof(struct rte_sched_subport_stats));
1628         memset(&s->stats, 0, sizeof(struct rte_sched_subport_stats));
1629
1630         /* Subport TC oversubscription status */
1631         *tc_ov = s->tc_ov;
1632
1633         return 0;
1634 }
1635
1636 int
1637 rte_sched_queue_read_stats(struct rte_sched_port *port,
1638         uint32_t queue_id,
1639         struct rte_sched_queue_stats *stats,
1640         uint16_t *qlen)
1641 {
1642         struct rte_sched_subport *s;
1643         struct rte_sched_queue *q;
1644         struct rte_sched_queue_extra *qe;
1645         uint32_t subport_id, subport_qmask, subport_qindex;
1646
1647         /* Check user parameters */
1648         if (port == NULL) {
1649                 RTE_LOG(ERR, SCHED,
1650                         "%s: Incorrect value for parameter port\n", __func__);
1651                 return -EINVAL;
1652         }
1653
1654         if (queue_id >= rte_sched_port_queues_per_port(port)) {
1655                 RTE_LOG(ERR, SCHED,
1656                         "%s: Incorrect value for queue id\n", __func__);
1657                 return -EINVAL;
1658         }
1659
1660         if (stats == NULL) {
1661                 RTE_LOG(ERR, SCHED,
1662                         "%s: Incorrect value for parameter stats\n", __func__);
1663                 return -EINVAL;
1664         }
1665
1666         if (qlen == NULL) {
1667                 RTE_LOG(ERR, SCHED,
1668                         "%s: Incorrect value for parameter qlen\n", __func__);
1669                 return -EINVAL;
1670         }
1671         subport_qmask = port->n_pipes_per_subport_log2 + 4;
1672         subport_id = (queue_id >> subport_qmask) & (port->n_subports_per_port - 1);
1673
1674         s = port->subports[subport_id];
1675         subport_qindex = ((1 << subport_qmask) - 1) & queue_id;
1676         q = s->queue + subport_qindex;
1677         qe = s->queue_extra + subport_qindex;
1678
1679         /* Copy queue stats and clear */
1680         memcpy(stats, &qe->stats, sizeof(struct rte_sched_queue_stats));
1681         memset(&qe->stats, 0, sizeof(struct rte_sched_queue_stats));
1682
1683         /* Queue length */
1684         *qlen = q->qw - q->qr;
1685
1686         return 0;
1687 }
1688
1689 #ifdef RTE_SCHED_DEBUG
1690
1691 static inline int
1692 rte_sched_port_queue_is_empty(struct rte_sched_subport *subport,
1693         uint32_t qindex)
1694 {
1695         struct rte_sched_queue *queue = subport->queue + qindex;
1696
1697         return queue->qr == queue->qw;
1698 }
1699
1700 #endif /* RTE_SCHED_DEBUG */
1701
1702 #ifdef RTE_SCHED_COLLECT_STATS
1703
1704 static inline void
1705 rte_sched_port_update_subport_stats(struct rte_sched_port *port,
1706         struct rte_sched_subport *subport,
1707         uint32_t qindex,
1708         struct rte_mbuf *pkt)
1709 {
1710         uint32_t tc_index = rte_sched_port_pipe_tc(port, qindex);
1711         uint32_t pkt_len = pkt->pkt_len;
1712
1713         subport->stats.n_pkts_tc[tc_index] += 1;
1714         subport->stats.n_bytes_tc[tc_index] += pkt_len;
1715 }
1716
1717 #ifdef RTE_SCHED_RED
1718 static inline void
1719 rte_sched_port_update_subport_stats_on_drop(struct rte_sched_port *port,
1720         struct rte_sched_subport *subport,
1721         uint32_t qindex,
1722         struct rte_mbuf *pkt,
1723         uint32_t red)
1724 #else
1725 static inline void
1726 rte_sched_port_update_subport_stats_on_drop(struct rte_sched_port *port,
1727         struct rte_sched_subport *subport,
1728         uint32_t qindex,
1729         struct rte_mbuf *pkt,
1730         __rte_unused uint32_t red)
1731 #endif
1732 {
1733         uint32_t tc_index = rte_sched_port_pipe_tc(port, qindex);
1734         uint32_t pkt_len = pkt->pkt_len;
1735
1736         subport->stats.n_pkts_tc_dropped[tc_index] += 1;
1737         subport->stats.n_bytes_tc_dropped[tc_index] += pkt_len;
1738 #ifdef RTE_SCHED_RED
1739         subport->stats.n_pkts_red_dropped[tc_index] += red;
1740 #endif
1741 }
1742
1743 static inline void
1744 rte_sched_port_update_queue_stats(struct rte_sched_subport *subport,
1745         uint32_t qindex,
1746         struct rte_mbuf *pkt)
1747 {
1748         struct rte_sched_queue_extra *qe = subport->queue_extra + qindex;
1749         uint32_t pkt_len = pkt->pkt_len;
1750
1751         qe->stats.n_pkts += 1;
1752         qe->stats.n_bytes += pkt_len;
1753 }
1754
1755 #ifdef RTE_SCHED_RED
1756 static inline void
1757 rte_sched_port_update_queue_stats_on_drop(struct rte_sched_subport *subport,
1758         uint32_t qindex,
1759         struct rte_mbuf *pkt,
1760         uint32_t red)
1761 #else
1762 static inline void
1763 rte_sched_port_update_queue_stats_on_drop(struct rte_sched_subport *subport,
1764         uint32_t qindex,
1765         struct rte_mbuf *pkt,
1766         __rte_unused uint32_t red)
1767 #endif
1768 {
1769         struct rte_sched_queue_extra *qe = subport->queue_extra + qindex;
1770         uint32_t pkt_len = pkt->pkt_len;
1771
1772         qe->stats.n_pkts_dropped += 1;
1773         qe->stats.n_bytes_dropped += pkt_len;
1774 #ifdef RTE_SCHED_RED
1775         qe->stats.n_pkts_red_dropped += red;
1776 #endif
1777 }
1778
1779 #endif /* RTE_SCHED_COLLECT_STATS */
1780
1781 #ifdef RTE_SCHED_RED
1782
1783 static inline int
1784 rte_sched_port_red_drop(struct rte_sched_port *port,
1785         struct rte_sched_subport *subport,
1786         struct rte_mbuf *pkt,
1787         uint32_t qindex,
1788         uint16_t qlen)
1789 {
1790         struct rte_sched_queue_extra *qe;
1791         struct rte_red_config *red_cfg;
1792         struct rte_red *red;
1793         uint32_t tc_index;
1794         enum rte_color color;
1795
1796         tc_index = rte_sched_port_pipe_tc(port, qindex);
1797         color = rte_sched_port_pkt_read_color(pkt);
1798         red_cfg = &subport->red_config[tc_index][color];
1799
1800         if ((red_cfg->min_th | red_cfg->max_th) == 0)
1801                 return 0;
1802
1803         qe = subport->queue_extra + qindex;
1804         red = &qe->red;
1805
1806         return rte_red_enqueue(red_cfg, red, qlen, port->time);
1807 }
1808
1809 static inline void
1810 rte_sched_port_set_queue_empty_timestamp(struct rte_sched_port *port,
1811         struct rte_sched_subport *subport, uint32_t qindex)
1812 {
1813         struct rte_sched_queue_extra *qe = subport->queue_extra + qindex;
1814         struct rte_red *red = &qe->red;
1815
1816         rte_red_mark_queue_empty(red, port->time);
1817 }
1818
1819 #else
1820
1821 static inline int rte_sched_port_red_drop(struct rte_sched_port *port __rte_unused,
1822         struct rte_sched_subport *subport __rte_unused,
1823         struct rte_mbuf *pkt __rte_unused,
1824         uint32_t qindex __rte_unused,
1825         uint16_t qlen __rte_unused)
1826 {
1827         return 0;
1828 }
1829
1830 #define rte_sched_port_set_queue_empty_timestamp(port, subport, qindex)
1831
1832 #endif /* RTE_SCHED_RED */
1833
1834 #ifdef RTE_SCHED_DEBUG
1835
1836 static inline void
1837 debug_check_queue_slab(struct rte_sched_subport *subport, uint32_t bmp_pos,
1838                        uint64_t bmp_slab)
1839 {
1840         uint64_t mask;
1841         uint32_t i, panic;
1842
1843         if (bmp_slab == 0)
1844                 rte_panic("Empty slab at position %u\n", bmp_pos);
1845
1846         panic = 0;
1847         for (i = 0, mask = 1; i < 64; i++, mask <<= 1) {
1848                 if (mask & bmp_slab) {
1849                         if (rte_sched_port_queue_is_empty(subport, bmp_pos + i)) {
1850                                 printf("Queue %u (slab offset %u) is empty\n", bmp_pos + i, i);
1851                                 panic = 1;
1852                         }
1853                 }
1854         }
1855
1856         if (panic)
1857                 rte_panic("Empty queues in slab 0x%" PRIx64 "starting at position %u\n",
1858                         bmp_slab, bmp_pos);
1859 }
1860
1861 #endif /* RTE_SCHED_DEBUG */
1862
1863 static inline struct rte_sched_subport *
1864 rte_sched_port_subport(struct rte_sched_port *port,
1865         struct rte_mbuf *pkt)
1866 {
1867         uint32_t queue_id = rte_mbuf_sched_queue_get(pkt);
1868         uint32_t subport_id = queue_id >> (port->n_pipes_per_subport_log2 + 4);
1869
1870         return port->subports[subport_id];
1871 }
1872
1873 static inline uint32_t
1874 rte_sched_port_enqueue_qptrs_prefetch0(struct rte_sched_subport *subport,
1875         struct rte_mbuf *pkt, uint32_t subport_qmask)
1876 {
1877         struct rte_sched_queue *q;
1878 #ifdef RTE_SCHED_COLLECT_STATS
1879         struct rte_sched_queue_extra *qe;
1880 #endif
1881         uint32_t qindex = rte_mbuf_sched_queue_get(pkt);
1882         uint32_t subport_queue_id = subport_qmask & qindex;
1883
1884         q = subport->queue + subport_queue_id;
1885         rte_prefetch0(q);
1886 #ifdef RTE_SCHED_COLLECT_STATS
1887         qe = subport->queue_extra + subport_queue_id;
1888         rte_prefetch0(qe);
1889 #endif
1890
1891         return subport_queue_id;
1892 }
1893
1894 static inline void
1895 rte_sched_port_enqueue_qwa_prefetch0(struct rte_sched_port *port,
1896         struct rte_sched_subport *subport,
1897         uint32_t qindex,
1898         struct rte_mbuf **qbase)
1899 {
1900         struct rte_sched_queue *q;
1901         struct rte_mbuf **q_qw;
1902         uint16_t qsize;
1903
1904         q = subport->queue + qindex;
1905         qsize = rte_sched_subport_pipe_qsize(port, subport, qindex);
1906         q_qw = qbase + (q->qw & (qsize - 1));
1907
1908         rte_prefetch0(q_qw);
1909         rte_bitmap_prefetch0(subport->bmp, qindex);
1910 }
1911
1912 static inline int
1913 rte_sched_port_enqueue_qwa(struct rte_sched_port *port,
1914         struct rte_sched_subport *subport,
1915         uint32_t qindex,
1916         struct rte_mbuf **qbase,
1917         struct rte_mbuf *pkt)
1918 {
1919         struct rte_sched_queue *q;
1920         uint16_t qsize;
1921         uint16_t qlen;
1922
1923         q = subport->queue + qindex;
1924         qsize = rte_sched_subport_pipe_qsize(port, subport, qindex);
1925         qlen = q->qw - q->qr;
1926
1927         /* Drop the packet (and update drop stats) when queue is full */
1928         if (unlikely(rte_sched_port_red_drop(port, subport, pkt, qindex, qlen) ||
1929                      (qlen >= qsize))) {
1930                 rte_pktmbuf_free(pkt);
1931 #ifdef RTE_SCHED_COLLECT_STATS
1932                 rte_sched_port_update_subport_stats_on_drop(port, subport,
1933                         qindex, pkt, qlen < qsize);
1934                 rte_sched_port_update_queue_stats_on_drop(subport, qindex, pkt,
1935                         qlen < qsize);
1936 #endif
1937                 return 0;
1938         }
1939
1940         /* Enqueue packet */
1941         qbase[q->qw & (qsize - 1)] = pkt;
1942         q->qw++;
1943
1944         /* Activate queue in the subport bitmap */
1945         rte_bitmap_set(subport->bmp, qindex);
1946
1947         /* Statistics */
1948 #ifdef RTE_SCHED_COLLECT_STATS
1949         rte_sched_port_update_subport_stats(port, subport, qindex, pkt);
1950         rte_sched_port_update_queue_stats(subport, qindex, pkt);
1951 #endif
1952
1953         return 1;
1954 }
1955
1956
1957 /*
1958  * The enqueue function implements a 4-level pipeline with each stage
1959  * processing two different packets. The purpose of using a pipeline
1960  * is to hide the latency of prefetching the data structures. The
1961  * naming convention is presented in the diagram below:
1962  *
1963  *   p00  _______   p10  _______   p20  _______   p30  _______
1964  * ----->|       |----->|       |----->|       |----->|       |----->
1965  *       |   0   |      |   1   |      |   2   |      |   3   |
1966  * ----->|_______|----->|_______|----->|_______|----->|_______|----->
1967  *   p01            p11            p21            p31
1968  *
1969  */
1970 int
1971 rte_sched_port_enqueue(struct rte_sched_port *port, struct rte_mbuf **pkts,
1972                        uint32_t n_pkts)
1973 {
1974         struct rte_mbuf *pkt00, *pkt01, *pkt10, *pkt11, *pkt20, *pkt21,
1975                 *pkt30, *pkt31, *pkt_last;
1976         struct rte_mbuf **q00_base, **q01_base, **q10_base, **q11_base,
1977                 **q20_base, **q21_base, **q30_base, **q31_base, **q_last_base;
1978         struct rte_sched_subport *subport00, *subport01, *subport10, *subport11,
1979                 *subport20, *subport21, *subport30, *subport31, *subport_last;
1980         uint32_t q00, q01, q10, q11, q20, q21, q30, q31, q_last;
1981         uint32_t r00, r01, r10, r11, r20, r21, r30, r31, r_last;
1982         uint32_t subport_qmask;
1983         uint32_t result, i;
1984
1985         result = 0;
1986         subport_qmask = (1 << (port->n_pipes_per_subport_log2 + 4)) - 1;
1987
1988         /*
1989          * Less then 6 input packets available, which is not enough to
1990          * feed the pipeline
1991          */
1992         if (unlikely(n_pkts < 6)) {
1993                 struct rte_sched_subport *subports[5];
1994                 struct rte_mbuf **q_base[5];
1995                 uint32_t q[5];
1996
1997                 /* Prefetch the mbuf structure of each packet */
1998                 for (i = 0; i < n_pkts; i++)
1999                         rte_prefetch0(pkts[i]);
2000
2001                 /* Prefetch the subport structure for each packet */
2002                 for (i = 0; i < n_pkts; i++)
2003                         subports[i] = rte_sched_port_subport(port, pkts[i]);
2004
2005                 /* Prefetch the queue structure for each queue */
2006                 for (i = 0; i < n_pkts; i++)
2007                         q[i] = rte_sched_port_enqueue_qptrs_prefetch0(subports[i],
2008                                         pkts[i], subport_qmask);
2009
2010                 /* Prefetch the write pointer location of each queue */
2011                 for (i = 0; i < n_pkts; i++) {
2012                         q_base[i] = rte_sched_subport_pipe_qbase(subports[i], q[i]);
2013                         rte_sched_port_enqueue_qwa_prefetch0(port, subports[i],
2014                                 q[i], q_base[i]);
2015                 }
2016
2017                 /* Write each packet to its queue */
2018                 for (i = 0; i < n_pkts; i++)
2019                         result += rte_sched_port_enqueue_qwa(port, subports[i],
2020                                                 q[i], q_base[i], pkts[i]);
2021
2022                 return result;
2023         }
2024
2025         /* Feed the first 3 stages of the pipeline (6 packets needed) */
2026         pkt20 = pkts[0];
2027         pkt21 = pkts[1];
2028         rte_prefetch0(pkt20);
2029         rte_prefetch0(pkt21);
2030
2031         pkt10 = pkts[2];
2032         pkt11 = pkts[3];
2033         rte_prefetch0(pkt10);
2034         rte_prefetch0(pkt11);
2035
2036         subport20 = rte_sched_port_subport(port, pkt20);
2037         subport21 = rte_sched_port_subport(port, pkt21);
2038         q20 = rte_sched_port_enqueue_qptrs_prefetch0(subport20,
2039                         pkt20, subport_qmask);
2040         q21 = rte_sched_port_enqueue_qptrs_prefetch0(subport21,
2041                         pkt21, subport_qmask);
2042
2043         pkt00 = pkts[4];
2044         pkt01 = pkts[5];
2045         rte_prefetch0(pkt00);
2046         rte_prefetch0(pkt01);
2047
2048         subport10 = rte_sched_port_subport(port, pkt10);
2049         subport11 = rte_sched_port_subport(port, pkt11);
2050         q10 = rte_sched_port_enqueue_qptrs_prefetch0(subport10,
2051                         pkt10, subport_qmask);
2052         q11 = rte_sched_port_enqueue_qptrs_prefetch0(subport11,
2053                         pkt11, subport_qmask);
2054
2055         q20_base = rte_sched_subport_pipe_qbase(subport20, q20);
2056         q21_base = rte_sched_subport_pipe_qbase(subport21, q21);
2057         rte_sched_port_enqueue_qwa_prefetch0(port, subport20, q20, q20_base);
2058         rte_sched_port_enqueue_qwa_prefetch0(port, subport21, q21, q21_base);
2059
2060         /* Run the pipeline */
2061         for (i = 6; i < (n_pkts & (~1)); i += 2) {
2062                 /* Propagate stage inputs */
2063                 pkt30 = pkt20;
2064                 pkt31 = pkt21;
2065                 pkt20 = pkt10;
2066                 pkt21 = pkt11;
2067                 pkt10 = pkt00;
2068                 pkt11 = pkt01;
2069                 q30 = q20;
2070                 q31 = q21;
2071                 q20 = q10;
2072                 q21 = q11;
2073                 subport30 = subport20;
2074                 subport31 = subport21;
2075                 subport20 = subport10;
2076                 subport21 = subport11;
2077                 q30_base = q20_base;
2078                 q31_base = q21_base;
2079
2080                 /* Stage 0: Get packets in */
2081                 pkt00 = pkts[i];
2082                 pkt01 = pkts[i + 1];
2083                 rte_prefetch0(pkt00);
2084                 rte_prefetch0(pkt01);
2085
2086                 /* Stage 1: Prefetch subport and queue structure storing queue pointers */
2087                 subport10 = rte_sched_port_subport(port, pkt10);
2088                 subport11 = rte_sched_port_subport(port, pkt11);
2089                 q10 = rte_sched_port_enqueue_qptrs_prefetch0(subport10,
2090                                 pkt10, subport_qmask);
2091                 q11 = rte_sched_port_enqueue_qptrs_prefetch0(subport11,
2092                                 pkt11, subport_qmask);
2093
2094                 /* Stage 2: Prefetch queue write location */
2095                 q20_base = rte_sched_subport_pipe_qbase(subport20, q20);
2096                 q21_base = rte_sched_subport_pipe_qbase(subport21, q21);
2097                 rte_sched_port_enqueue_qwa_prefetch0(port, subport20, q20, q20_base);
2098                 rte_sched_port_enqueue_qwa_prefetch0(port, subport21, q21, q21_base);
2099
2100                 /* Stage 3: Write packet to queue and activate queue */
2101                 r30 = rte_sched_port_enqueue_qwa(port, subport30,
2102                                 q30, q30_base, pkt30);
2103                 r31 = rte_sched_port_enqueue_qwa(port, subport31,
2104                                 q31, q31_base, pkt31);
2105                 result += r30 + r31;
2106         }
2107
2108         /*
2109          * Drain the pipeline (exactly 6 packets).
2110          * Handle the last packet in the case
2111          * of an odd number of input packets.
2112          */
2113         pkt_last = pkts[n_pkts - 1];
2114         rte_prefetch0(pkt_last);
2115
2116         subport00 = rte_sched_port_subport(port, pkt00);
2117         subport01 = rte_sched_port_subport(port, pkt01);
2118         q00 = rte_sched_port_enqueue_qptrs_prefetch0(subport00,
2119                         pkt00, subport_qmask);
2120         q01 = rte_sched_port_enqueue_qptrs_prefetch0(subport01,
2121                         pkt01, subport_qmask);
2122
2123         q10_base = rte_sched_subport_pipe_qbase(subport10, q10);
2124         q11_base = rte_sched_subport_pipe_qbase(subport11, q11);
2125         rte_sched_port_enqueue_qwa_prefetch0(port, subport10, q10, q10_base);
2126         rte_sched_port_enqueue_qwa_prefetch0(port, subport11, q11, q11_base);
2127
2128         r20 = rte_sched_port_enqueue_qwa(port, subport20,
2129                         q20, q20_base, pkt20);
2130         r21 = rte_sched_port_enqueue_qwa(port, subport21,
2131                         q21, q21_base, pkt21);
2132         result += r20 + r21;
2133
2134         subport_last = rte_sched_port_subport(port, pkt_last);
2135         q_last = rte_sched_port_enqueue_qptrs_prefetch0(subport_last,
2136                                 pkt_last, subport_qmask);
2137
2138         q00_base = rte_sched_subport_pipe_qbase(subport00, q00);
2139         q01_base = rte_sched_subport_pipe_qbase(subport01, q01);
2140         rte_sched_port_enqueue_qwa_prefetch0(port, subport00, q00, q00_base);
2141         rte_sched_port_enqueue_qwa_prefetch0(port, subport01, q01, q01_base);
2142
2143         r10 = rte_sched_port_enqueue_qwa(port, subport10, q10,
2144                         q10_base, pkt10);
2145         r11 = rte_sched_port_enqueue_qwa(port, subport11, q11,
2146                         q11_base, pkt11);
2147         result += r10 + r11;
2148
2149         q_last_base = rte_sched_subport_pipe_qbase(subport_last, q_last);
2150         rte_sched_port_enqueue_qwa_prefetch0(port, subport_last,
2151                 q_last, q_last_base);
2152
2153         r00 = rte_sched_port_enqueue_qwa(port, subport00, q00,
2154                         q00_base, pkt00);
2155         r01 = rte_sched_port_enqueue_qwa(port, subport01, q01,
2156                         q01_base, pkt01);
2157         result += r00 + r01;
2158
2159         if (n_pkts & 1) {
2160                 r_last = rte_sched_port_enqueue_qwa(port, subport_last,
2161                                         q_last, q_last_base, pkt_last);
2162                 result += r_last;
2163         }
2164
2165         return result;
2166 }
2167
2168 #ifndef RTE_SCHED_SUBPORT_TC_OV
2169
2170 static inline void
2171 grinder_credits_update(struct rte_sched_port *port,
2172         struct rte_sched_subport *subport, uint32_t pos)
2173 {
2174         struct rte_sched_grinder *grinder = subport->grinder + pos;
2175         struct rte_sched_pipe *pipe = grinder->pipe;
2176         struct rte_sched_pipe_profile *params = grinder->pipe_params;
2177         struct rte_sched_subport_profile *sp = grinder->subport_params;
2178         uint64_t n_periods;
2179         uint32_t i;
2180
2181         /* Subport TB */
2182         n_periods = (port->time - subport->tb_time) / sp->tb_period;
2183         subport->tb_credits += n_periods * sp->tb_credits_per_period;
2184         subport->tb_credits = RTE_MIN(subport->tb_credits, sp->tb_size);
2185         subport->tb_time += n_periods * sp->tb_period;
2186
2187         /* Pipe TB */
2188         n_periods = (port->time - pipe->tb_time) / params->tb_period;
2189         pipe->tb_credits += n_periods * params->tb_credits_per_period;
2190         pipe->tb_credits = RTE_MIN(pipe->tb_credits, params->tb_size);
2191         pipe->tb_time += n_periods * params->tb_period;
2192
2193         /* Subport TCs */
2194         if (unlikely(port->time >= subport->tc_time)) {
2195                 for (i = 0; i < RTE_SCHED_TRAFFIC_CLASSES_PER_PIPE; i++)
2196                         subport->tc_credits[i] = sp->tc_credits_per_period[i];
2197
2198                 subport->tc_time = port->time + sp->tc_period;
2199         }
2200
2201         /* Pipe TCs */
2202         if (unlikely(port->time >= pipe->tc_time)) {
2203                 for (i = 0; i < RTE_SCHED_TRAFFIC_CLASSES_PER_PIPE; i++)
2204                         pipe->tc_credits[i] = params->tc_credits_per_period[i];
2205
2206                 pipe->tc_time = port->time + params->tc_period;
2207         }
2208 }
2209
2210 #else
2211
2212 static inline uint64_t
2213 grinder_tc_ov_credits_update(struct rte_sched_port *port,
2214         struct rte_sched_subport *subport, uint32_t pos)
2215 {
2216         struct rte_sched_grinder *grinder = subport->grinder + pos;
2217         struct rte_sched_subport_profile *sp = grinder->subport_params;
2218         uint64_t tc_ov_consumption[RTE_SCHED_TRAFFIC_CLASSES_PER_PIPE];
2219         uint64_t tc_consumption = 0, tc_ov_consumption_max;
2220         uint64_t tc_ov_wm = subport->tc_ov_wm;
2221         uint32_t i;
2222
2223         if (subport->tc_ov == 0)
2224                 return subport->tc_ov_wm_max;
2225
2226         for (i = 0; i < RTE_SCHED_TRAFFIC_CLASS_BE; i++) {
2227                 tc_ov_consumption[i] = sp->tc_credits_per_period[i]
2228                                         -  subport->tc_credits[i];
2229                 tc_consumption += tc_ov_consumption[i];
2230         }
2231
2232         tc_ov_consumption[RTE_SCHED_TRAFFIC_CLASS_BE] =
2233         sp->tc_credits_per_period[RTE_SCHED_TRAFFIC_CLASS_BE] -
2234                 subport->tc_credits[RTE_SCHED_TRAFFIC_CLASS_BE];
2235
2236         tc_ov_consumption_max =
2237         sp->tc_credits_per_period[RTE_SCHED_TRAFFIC_CLASS_BE] -
2238                         tc_consumption;
2239
2240         if (tc_ov_consumption[RTE_SCHED_TRAFFIC_CLASS_BE] >
2241                 (tc_ov_consumption_max - port->mtu)) {
2242                 tc_ov_wm  -= tc_ov_wm >> 7;
2243                 if (tc_ov_wm < subport->tc_ov_wm_min)
2244                         tc_ov_wm = subport->tc_ov_wm_min;
2245
2246                 return tc_ov_wm;
2247         }
2248
2249         tc_ov_wm += (tc_ov_wm >> 7) + 1;
2250         if (tc_ov_wm > subport->tc_ov_wm_max)
2251                 tc_ov_wm = subport->tc_ov_wm_max;
2252
2253         return tc_ov_wm;
2254 }
2255
2256 static inline void
2257 grinder_credits_update(struct rte_sched_port *port,
2258         struct rte_sched_subport *subport, uint32_t pos)
2259 {
2260         struct rte_sched_grinder *grinder = subport->grinder + pos;
2261         struct rte_sched_pipe *pipe = grinder->pipe;
2262         struct rte_sched_pipe_profile *params = grinder->pipe_params;
2263         struct rte_sched_subport_profile *sp = grinder->subport_params;
2264         uint64_t n_periods;
2265         uint32_t i;
2266
2267         /* Subport TB */
2268         n_periods = (port->time - subport->tb_time) / sp->tb_period;
2269         subport->tb_credits += n_periods * sp->tb_credits_per_period;
2270         subport->tb_credits = RTE_MIN(subport->tb_credits, sp->tb_size);
2271         subport->tb_time += n_periods * sp->tb_period;
2272
2273         /* Pipe TB */
2274         n_periods = (port->time - pipe->tb_time) / params->tb_period;
2275         pipe->tb_credits += n_periods * params->tb_credits_per_period;
2276         pipe->tb_credits = RTE_MIN(pipe->tb_credits, params->tb_size);
2277         pipe->tb_time += n_periods * params->tb_period;
2278
2279         /* Subport TCs */
2280         if (unlikely(port->time >= subport->tc_time)) {
2281                 subport->tc_ov_wm =
2282                         grinder_tc_ov_credits_update(port, subport, pos);
2283
2284                 for (i = 0; i < RTE_SCHED_TRAFFIC_CLASSES_PER_PIPE; i++)
2285                         subport->tc_credits[i] = sp->tc_credits_per_period[i];
2286
2287                 subport->tc_time = port->time + sp->tc_period;
2288                 subport->tc_ov_period_id++;
2289         }
2290
2291         /* Pipe TCs */
2292         if (unlikely(port->time >= pipe->tc_time)) {
2293                 for (i = 0; i < RTE_SCHED_TRAFFIC_CLASSES_PER_PIPE; i++)
2294                         pipe->tc_credits[i] = params->tc_credits_per_period[i];
2295                 pipe->tc_time = port->time + params->tc_period;
2296         }
2297
2298         /* Pipe TCs - Oversubscription */
2299         if (unlikely(pipe->tc_ov_period_id != subport->tc_ov_period_id)) {
2300                 pipe->tc_ov_credits = subport->tc_ov_wm * params->tc_ov_weight;
2301
2302                 pipe->tc_ov_period_id = subport->tc_ov_period_id;
2303         }
2304 }
2305
2306 #endif /* RTE_SCHED_TS_CREDITS_UPDATE, RTE_SCHED_SUBPORT_TC_OV */
2307
2308
2309 #ifndef RTE_SCHED_SUBPORT_TC_OV
2310
2311 static inline int
2312 grinder_credits_check(struct rte_sched_port *port,
2313         struct rte_sched_subport *subport, uint32_t pos)
2314 {
2315         struct rte_sched_grinder *grinder = subport->grinder + pos;
2316         struct rte_sched_pipe *pipe = grinder->pipe;
2317         struct rte_mbuf *pkt = grinder->pkt;
2318         uint32_t tc_index = grinder->tc_index;
2319         uint64_t pkt_len = pkt->pkt_len + port->frame_overhead;
2320         uint64_t subport_tb_credits = subport->tb_credits;
2321         uint64_t subport_tc_credits = subport->tc_credits[tc_index];
2322         uint64_t pipe_tb_credits = pipe->tb_credits;
2323         uint64_t pipe_tc_credits = pipe->tc_credits[tc_index];
2324         int enough_credits;
2325
2326         /* Check queue credits */
2327         enough_credits = (pkt_len <= subport_tb_credits) &&
2328                 (pkt_len <= subport_tc_credits) &&
2329                 (pkt_len <= pipe_tb_credits) &&
2330                 (pkt_len <= pipe_tc_credits);
2331
2332         if (!enough_credits)
2333                 return 0;
2334
2335         /* Update port credits */
2336         subport->tb_credits -= pkt_len;
2337         subport->tc_credits[tc_index] -= pkt_len;
2338         pipe->tb_credits -= pkt_len;
2339         pipe->tc_credits[tc_index] -= pkt_len;
2340
2341         return 1;
2342 }
2343
2344 #else
2345
2346 static inline int
2347 grinder_credits_check(struct rte_sched_port *port,
2348         struct rte_sched_subport *subport, uint32_t pos)
2349 {
2350         struct rte_sched_grinder *grinder = subport->grinder + pos;
2351         struct rte_sched_pipe *pipe = grinder->pipe;
2352         struct rte_mbuf *pkt = grinder->pkt;
2353         uint32_t tc_index = grinder->tc_index;
2354         uint64_t pkt_len = pkt->pkt_len + port->frame_overhead;
2355         uint64_t subport_tb_credits = subport->tb_credits;
2356         uint64_t subport_tc_credits = subport->tc_credits[tc_index];
2357         uint64_t pipe_tb_credits = pipe->tb_credits;
2358         uint64_t pipe_tc_credits = pipe->tc_credits[tc_index];
2359         uint64_t pipe_tc_ov_mask1[RTE_SCHED_TRAFFIC_CLASSES_PER_PIPE];
2360         uint64_t pipe_tc_ov_mask2[RTE_SCHED_TRAFFIC_CLASSES_PER_PIPE] = {0};
2361         uint64_t pipe_tc_ov_credits;
2362         uint32_t i;
2363         int enough_credits;
2364
2365         for (i = 0; i < RTE_SCHED_TRAFFIC_CLASSES_PER_PIPE; i++)
2366                 pipe_tc_ov_mask1[i] = ~0LLU;
2367
2368         pipe_tc_ov_mask1[RTE_SCHED_TRAFFIC_CLASS_BE] = pipe->tc_ov_credits;
2369         pipe_tc_ov_mask2[RTE_SCHED_TRAFFIC_CLASS_BE] = ~0LLU;
2370         pipe_tc_ov_credits = pipe_tc_ov_mask1[tc_index];
2371
2372         /* Check pipe and subport credits */
2373         enough_credits = (pkt_len <= subport_tb_credits) &&
2374                 (pkt_len <= subport_tc_credits) &&
2375                 (pkt_len <= pipe_tb_credits) &&
2376                 (pkt_len <= pipe_tc_credits) &&
2377                 (pkt_len <= pipe_tc_ov_credits);
2378
2379         if (!enough_credits)
2380                 return 0;
2381
2382         /* Update pipe and subport credits */
2383         subport->tb_credits -= pkt_len;
2384         subport->tc_credits[tc_index] -= pkt_len;
2385         pipe->tb_credits -= pkt_len;
2386         pipe->tc_credits[tc_index] -= pkt_len;
2387         pipe->tc_ov_credits -= pipe_tc_ov_mask2[tc_index] & pkt_len;
2388
2389         return 1;
2390 }
2391
2392 #endif /* RTE_SCHED_SUBPORT_TC_OV */
2393
2394
2395 static inline int
2396 grinder_schedule(struct rte_sched_port *port,
2397         struct rte_sched_subport *subport, uint32_t pos)
2398 {
2399         struct rte_sched_grinder *grinder = subport->grinder + pos;
2400         struct rte_sched_queue *queue = grinder->queue[grinder->qpos];
2401         struct rte_mbuf *pkt = grinder->pkt;
2402         uint32_t pkt_len = pkt->pkt_len + port->frame_overhead;
2403         uint32_t be_tc_active;
2404
2405         if (!grinder_credits_check(port, subport, pos))
2406                 return 0;
2407
2408         /* Advance port time */
2409         port->time += pkt_len;
2410
2411         /* Send packet */
2412         port->pkts_out[port->n_pkts_out++] = pkt;
2413         queue->qr++;
2414
2415         be_tc_active = (grinder->tc_index == RTE_SCHED_TRAFFIC_CLASS_BE) ? ~0x0 : 0x0;
2416         grinder->wrr_tokens[grinder->qpos] +=
2417                 (pkt_len * grinder->wrr_cost[grinder->qpos]) & be_tc_active;
2418
2419         if (queue->qr == queue->qw) {
2420                 uint32_t qindex = grinder->qindex[grinder->qpos];
2421
2422                 rte_bitmap_clear(subport->bmp, qindex);
2423                 grinder->qmask &= ~(1 << grinder->qpos);
2424                 if (be_tc_active)
2425                         grinder->wrr_mask[grinder->qpos] = 0;
2426                 rte_sched_port_set_queue_empty_timestamp(port, subport, qindex);
2427         }
2428
2429         /* Reset pipe loop detection */
2430         subport->pipe_loop = RTE_SCHED_PIPE_INVALID;
2431         grinder->productive = 1;
2432
2433         return 1;
2434 }
2435
2436 #ifdef SCHED_VECTOR_SSE4
2437
2438 static inline int
2439 grinder_pipe_exists(struct rte_sched_subport *subport, uint32_t base_pipe)
2440 {
2441         __m128i index = _mm_set1_epi32(base_pipe);
2442         __m128i pipes = _mm_load_si128((__m128i *)subport->grinder_base_bmp_pos);
2443         __m128i res = _mm_cmpeq_epi32(pipes, index);
2444
2445         pipes = _mm_load_si128((__m128i *)(subport->grinder_base_bmp_pos + 4));
2446         pipes = _mm_cmpeq_epi32(pipes, index);
2447         res = _mm_or_si128(res, pipes);
2448
2449         if (_mm_testz_si128(res, res))
2450                 return 0;
2451
2452         return 1;
2453 }
2454
2455 #elif defined(SCHED_VECTOR_NEON)
2456
2457 static inline int
2458 grinder_pipe_exists(struct rte_sched_subport *subport, uint32_t base_pipe)
2459 {
2460         uint32x4_t index, pipes;
2461         uint32_t *pos = (uint32_t *)subport->grinder_base_bmp_pos;
2462
2463         index = vmovq_n_u32(base_pipe);
2464         pipes = vld1q_u32(pos);
2465         if (!vminvq_u32(veorq_u32(pipes, index)))
2466                 return 1;
2467
2468         pipes = vld1q_u32(pos + 4);
2469         if (!vminvq_u32(veorq_u32(pipes, index)))
2470                 return 1;
2471
2472         return 0;
2473 }
2474
2475 #else
2476
2477 static inline int
2478 grinder_pipe_exists(struct rte_sched_subport *subport, uint32_t base_pipe)
2479 {
2480         uint32_t i;
2481
2482         for (i = 0; i < RTE_SCHED_PORT_N_GRINDERS; i++) {
2483                 if (subport->grinder_base_bmp_pos[i] == base_pipe)
2484                         return 1;
2485         }
2486
2487         return 0;
2488 }
2489
2490 #endif /* RTE_SCHED_OPTIMIZATIONS */
2491
2492 static inline void
2493 grinder_pcache_populate(struct rte_sched_subport *subport,
2494         uint32_t pos, uint32_t bmp_pos, uint64_t bmp_slab)
2495 {
2496         struct rte_sched_grinder *grinder = subport->grinder + pos;
2497         uint16_t w[4];
2498
2499         grinder->pcache_w = 0;
2500         grinder->pcache_r = 0;
2501
2502         w[0] = (uint16_t) bmp_slab;
2503         w[1] = (uint16_t) (bmp_slab >> 16);
2504         w[2] = (uint16_t) (bmp_slab >> 32);
2505         w[3] = (uint16_t) (bmp_slab >> 48);
2506
2507         grinder->pcache_qmask[grinder->pcache_w] = w[0];
2508         grinder->pcache_qindex[grinder->pcache_w] = bmp_pos;
2509         grinder->pcache_w += (w[0] != 0);
2510
2511         grinder->pcache_qmask[grinder->pcache_w] = w[1];
2512         grinder->pcache_qindex[grinder->pcache_w] = bmp_pos + 16;
2513         grinder->pcache_w += (w[1] != 0);
2514
2515         grinder->pcache_qmask[grinder->pcache_w] = w[2];
2516         grinder->pcache_qindex[grinder->pcache_w] = bmp_pos + 32;
2517         grinder->pcache_w += (w[2] != 0);
2518
2519         grinder->pcache_qmask[grinder->pcache_w] = w[3];
2520         grinder->pcache_qindex[grinder->pcache_w] = bmp_pos + 48;
2521         grinder->pcache_w += (w[3] != 0);
2522 }
2523
2524 static inline void
2525 grinder_tccache_populate(struct rte_sched_subport *subport,
2526         uint32_t pos, uint32_t qindex, uint16_t qmask)
2527 {
2528         struct rte_sched_grinder *grinder = subport->grinder + pos;
2529         uint8_t b, i;
2530
2531         grinder->tccache_w = 0;
2532         grinder->tccache_r = 0;
2533
2534         for (i = 0; i < RTE_SCHED_TRAFFIC_CLASS_BE; i++) {
2535                 b = (uint8_t) ((qmask >> i) & 0x1);
2536                 grinder->tccache_qmask[grinder->tccache_w] = b;
2537                 grinder->tccache_qindex[grinder->tccache_w] = qindex + i;
2538                 grinder->tccache_w += (b != 0);
2539         }
2540
2541         b = (uint8_t) (qmask >> (RTE_SCHED_TRAFFIC_CLASS_BE));
2542         grinder->tccache_qmask[grinder->tccache_w] = b;
2543         grinder->tccache_qindex[grinder->tccache_w] = qindex +
2544                 RTE_SCHED_TRAFFIC_CLASS_BE;
2545         grinder->tccache_w += (b != 0);
2546 }
2547
2548 static inline int
2549 grinder_next_tc(struct rte_sched_port *port,
2550         struct rte_sched_subport *subport, uint32_t pos)
2551 {
2552         struct rte_sched_grinder *grinder = subport->grinder + pos;
2553         struct rte_mbuf **qbase;
2554         uint32_t qindex;
2555         uint16_t qsize;
2556
2557         if (grinder->tccache_r == grinder->tccache_w)
2558                 return 0;
2559
2560         qindex = grinder->tccache_qindex[grinder->tccache_r];
2561         qbase = rte_sched_subport_pipe_qbase(subport, qindex);
2562         qsize = rte_sched_subport_pipe_qsize(port, subport, qindex);
2563
2564         grinder->tc_index = rte_sched_port_pipe_tc(port, qindex);
2565         grinder->qmask = grinder->tccache_qmask[grinder->tccache_r];
2566         grinder->qsize = qsize;
2567
2568         if (grinder->tc_index < RTE_SCHED_TRAFFIC_CLASS_BE) {
2569                 grinder->queue[0] = subport->queue + qindex;
2570                 grinder->qbase[0] = qbase;
2571                 grinder->qindex[0] = qindex;
2572                 grinder->tccache_r++;
2573
2574                 return 1;
2575         }
2576
2577         grinder->queue[0] = subport->queue + qindex;
2578         grinder->queue[1] = subport->queue + qindex + 1;
2579         grinder->queue[2] = subport->queue + qindex + 2;
2580         grinder->queue[3] = subport->queue + qindex + 3;
2581
2582         grinder->qbase[0] = qbase;
2583         grinder->qbase[1] = qbase + qsize;
2584         grinder->qbase[2] = qbase + 2 * qsize;
2585         grinder->qbase[3] = qbase + 3 * qsize;
2586
2587         grinder->qindex[0] = qindex;
2588         grinder->qindex[1] = qindex + 1;
2589         grinder->qindex[2] = qindex + 2;
2590         grinder->qindex[3] = qindex + 3;
2591
2592         grinder->tccache_r++;
2593         return 1;
2594 }
2595
2596 static inline int
2597 grinder_next_pipe(struct rte_sched_port *port,
2598         struct rte_sched_subport *subport, uint32_t pos)
2599 {
2600         struct rte_sched_grinder *grinder = subport->grinder + pos;
2601         uint32_t pipe_qindex;
2602         uint16_t pipe_qmask;
2603
2604         if (grinder->pcache_r < grinder->pcache_w) {
2605                 pipe_qmask = grinder->pcache_qmask[grinder->pcache_r];
2606                 pipe_qindex = grinder->pcache_qindex[grinder->pcache_r];
2607                 grinder->pcache_r++;
2608         } else {
2609                 uint64_t bmp_slab = 0;
2610                 uint32_t bmp_pos = 0;
2611
2612                 /* Get another non-empty pipe group */
2613                 if (unlikely(rte_bitmap_scan(subport->bmp, &bmp_pos, &bmp_slab) <= 0))
2614                         return 0;
2615
2616 #ifdef RTE_SCHED_DEBUG
2617                 debug_check_queue_slab(subport, bmp_pos, bmp_slab);
2618 #endif
2619
2620                 /* Return if pipe group already in one of the other grinders */
2621                 subport->grinder_base_bmp_pos[pos] = RTE_SCHED_BMP_POS_INVALID;
2622                 if (unlikely(grinder_pipe_exists(subport, bmp_pos)))
2623                         return 0;
2624
2625                 subport->grinder_base_bmp_pos[pos] = bmp_pos;
2626
2627                 /* Install new pipe group into grinder's pipe cache */
2628                 grinder_pcache_populate(subport, pos, bmp_pos, bmp_slab);
2629
2630                 pipe_qmask = grinder->pcache_qmask[0];
2631                 pipe_qindex = grinder->pcache_qindex[0];
2632                 grinder->pcache_r = 1;
2633         }
2634
2635         /* Install new pipe in the grinder */
2636         grinder->pindex = pipe_qindex >> 4;
2637         grinder->subport = subport;
2638         grinder->pipe = subport->pipe + grinder->pindex;
2639         grinder->pipe_params = NULL; /* to be set after the pipe structure is prefetched */
2640         grinder->productive = 0;
2641
2642         grinder_tccache_populate(subport, pos, pipe_qindex, pipe_qmask);
2643         grinder_next_tc(port, subport, pos);
2644
2645         /* Check for pipe exhaustion */
2646         if (grinder->pindex == subport->pipe_loop) {
2647                 subport->pipe_exhaustion = 1;
2648                 subport->pipe_loop = RTE_SCHED_PIPE_INVALID;
2649         }
2650
2651         return 1;
2652 }
2653
2654
2655 static inline void
2656 grinder_wrr_load(struct rte_sched_subport *subport, uint32_t pos)
2657 {
2658         struct rte_sched_grinder *grinder = subport->grinder + pos;
2659         struct rte_sched_pipe *pipe = grinder->pipe;
2660         struct rte_sched_pipe_profile *pipe_params = grinder->pipe_params;
2661         uint32_t qmask = grinder->qmask;
2662
2663         grinder->wrr_tokens[0] =
2664                 ((uint16_t) pipe->wrr_tokens[0]) << RTE_SCHED_WRR_SHIFT;
2665         grinder->wrr_tokens[1] =
2666                 ((uint16_t) pipe->wrr_tokens[1]) << RTE_SCHED_WRR_SHIFT;
2667         grinder->wrr_tokens[2] =
2668                 ((uint16_t) pipe->wrr_tokens[2]) << RTE_SCHED_WRR_SHIFT;
2669         grinder->wrr_tokens[3] =
2670                 ((uint16_t) pipe->wrr_tokens[3]) << RTE_SCHED_WRR_SHIFT;
2671
2672         grinder->wrr_mask[0] = (qmask & 0x1) * 0xFFFF;
2673         grinder->wrr_mask[1] = ((qmask >> 1) & 0x1) * 0xFFFF;
2674         grinder->wrr_mask[2] = ((qmask >> 2) & 0x1) * 0xFFFF;
2675         grinder->wrr_mask[3] = ((qmask >> 3) & 0x1) * 0xFFFF;
2676
2677         grinder->wrr_cost[0] = pipe_params->wrr_cost[0];
2678         grinder->wrr_cost[1] = pipe_params->wrr_cost[1];
2679         grinder->wrr_cost[2] = pipe_params->wrr_cost[2];
2680         grinder->wrr_cost[3] = pipe_params->wrr_cost[3];
2681 }
2682
2683 static inline void
2684 grinder_wrr_store(struct rte_sched_subport *subport, uint32_t pos)
2685 {
2686         struct rte_sched_grinder *grinder = subport->grinder + pos;
2687         struct rte_sched_pipe *pipe = grinder->pipe;
2688
2689         pipe->wrr_tokens[0] =
2690                         (grinder->wrr_tokens[0] & grinder->wrr_mask[0]) >>
2691                                 RTE_SCHED_WRR_SHIFT;
2692         pipe->wrr_tokens[1] =
2693                         (grinder->wrr_tokens[1] & grinder->wrr_mask[1]) >>
2694                                 RTE_SCHED_WRR_SHIFT;
2695         pipe->wrr_tokens[2] =
2696                         (grinder->wrr_tokens[2] & grinder->wrr_mask[2]) >>
2697                                 RTE_SCHED_WRR_SHIFT;
2698         pipe->wrr_tokens[3] =
2699                         (grinder->wrr_tokens[3] & grinder->wrr_mask[3]) >>
2700                                 RTE_SCHED_WRR_SHIFT;
2701 }
2702
2703 static inline void
2704 grinder_wrr(struct rte_sched_subport *subport, uint32_t pos)
2705 {
2706         struct rte_sched_grinder *grinder = subport->grinder + pos;
2707         uint16_t wrr_tokens_min;
2708
2709         grinder->wrr_tokens[0] |= ~grinder->wrr_mask[0];
2710         grinder->wrr_tokens[1] |= ~grinder->wrr_mask[1];
2711         grinder->wrr_tokens[2] |= ~grinder->wrr_mask[2];
2712         grinder->wrr_tokens[3] |= ~grinder->wrr_mask[3];
2713
2714         grinder->qpos = rte_min_pos_4_u16(grinder->wrr_tokens);
2715         wrr_tokens_min = grinder->wrr_tokens[grinder->qpos];
2716
2717         grinder->wrr_tokens[0] -= wrr_tokens_min;
2718         grinder->wrr_tokens[1] -= wrr_tokens_min;
2719         grinder->wrr_tokens[2] -= wrr_tokens_min;
2720         grinder->wrr_tokens[3] -= wrr_tokens_min;
2721 }
2722
2723
2724 #define grinder_evict(subport, pos)
2725
2726 static inline void
2727 grinder_prefetch_pipe(struct rte_sched_subport *subport, uint32_t pos)
2728 {
2729         struct rte_sched_grinder *grinder = subport->grinder + pos;
2730
2731         rte_prefetch0(grinder->pipe);
2732         rte_prefetch0(grinder->queue[0]);
2733 }
2734
2735 static inline void
2736 grinder_prefetch_tc_queue_arrays(struct rte_sched_subport *subport, uint32_t pos)
2737 {
2738         struct rte_sched_grinder *grinder = subport->grinder + pos;
2739         uint16_t qsize, qr[RTE_SCHED_MAX_QUEUES_PER_TC];
2740
2741         qsize = grinder->qsize;
2742         grinder->qpos = 0;
2743
2744         if (grinder->tc_index < RTE_SCHED_TRAFFIC_CLASS_BE) {
2745                 qr[0] = grinder->queue[0]->qr & (qsize - 1);
2746
2747                 rte_prefetch0(grinder->qbase[0] + qr[0]);
2748                 return;
2749         }
2750
2751         qr[0] = grinder->queue[0]->qr & (qsize - 1);
2752         qr[1] = grinder->queue[1]->qr & (qsize - 1);
2753         qr[2] = grinder->queue[2]->qr & (qsize - 1);
2754         qr[3] = grinder->queue[3]->qr & (qsize - 1);
2755
2756         rte_prefetch0(grinder->qbase[0] + qr[0]);
2757         rte_prefetch0(grinder->qbase[1] + qr[1]);
2758
2759         grinder_wrr_load(subport, pos);
2760         grinder_wrr(subport, pos);
2761
2762         rte_prefetch0(grinder->qbase[2] + qr[2]);
2763         rte_prefetch0(grinder->qbase[3] + qr[3]);
2764 }
2765
2766 static inline void
2767 grinder_prefetch_mbuf(struct rte_sched_subport *subport, uint32_t pos)
2768 {
2769         struct rte_sched_grinder *grinder = subport->grinder + pos;
2770         uint32_t qpos = grinder->qpos;
2771         struct rte_mbuf **qbase = grinder->qbase[qpos];
2772         uint16_t qsize = grinder->qsize;
2773         uint16_t qr = grinder->queue[qpos]->qr & (qsize - 1);
2774
2775         grinder->pkt = qbase[qr];
2776         rte_prefetch0(grinder->pkt);
2777
2778         if (unlikely((qr & 0x7) == 7)) {
2779                 uint16_t qr_next = (grinder->queue[qpos]->qr + 1) & (qsize - 1);
2780
2781                 rte_prefetch0(qbase + qr_next);
2782         }
2783 }
2784
2785 static inline uint32_t
2786 grinder_handle(struct rte_sched_port *port,
2787         struct rte_sched_subport *subport, uint32_t pos)
2788 {
2789         struct rte_sched_grinder *grinder = subport->grinder + pos;
2790
2791         switch (grinder->state) {
2792         case e_GRINDER_PREFETCH_PIPE:
2793         {
2794                 if (grinder_next_pipe(port, subport, pos)) {
2795                         grinder_prefetch_pipe(subport, pos);
2796                         subport->busy_grinders++;
2797
2798                         grinder->state = e_GRINDER_PREFETCH_TC_QUEUE_ARRAYS;
2799                         return 0;
2800                 }
2801
2802                 return 0;
2803         }
2804
2805         case e_GRINDER_PREFETCH_TC_QUEUE_ARRAYS:
2806         {
2807                 struct rte_sched_pipe *pipe = grinder->pipe;
2808
2809                 grinder->pipe_params = subport->pipe_profiles + pipe->profile;
2810                 grinder->subport_params = port->subport_profiles +
2811                                                 subport->profile;
2812
2813                 grinder_prefetch_tc_queue_arrays(subport, pos);
2814                 grinder_credits_update(port, subport, pos);
2815
2816                 grinder->state = e_GRINDER_PREFETCH_MBUF;
2817                 return 0;
2818         }
2819
2820         case e_GRINDER_PREFETCH_MBUF:
2821         {
2822                 grinder_prefetch_mbuf(subport, pos);
2823
2824                 grinder->state = e_GRINDER_READ_MBUF;
2825                 return 0;
2826         }
2827
2828         case e_GRINDER_READ_MBUF:
2829         {
2830                 uint32_t wrr_active, result = 0;
2831
2832                 result = grinder_schedule(port, subport, pos);
2833
2834                 wrr_active = (grinder->tc_index == RTE_SCHED_TRAFFIC_CLASS_BE);
2835
2836                 /* Look for next packet within the same TC */
2837                 if (result && grinder->qmask) {
2838                         if (wrr_active)
2839                                 grinder_wrr(subport, pos);
2840
2841                         grinder_prefetch_mbuf(subport, pos);
2842
2843                         return 1;
2844                 }
2845
2846                 if (wrr_active)
2847                         grinder_wrr_store(subport, pos);
2848
2849                 /* Look for another active TC within same pipe */
2850                 if (grinder_next_tc(port, subport, pos)) {
2851                         grinder_prefetch_tc_queue_arrays(subport, pos);
2852
2853                         grinder->state = e_GRINDER_PREFETCH_MBUF;
2854                         return result;
2855                 }
2856
2857                 if (grinder->productive == 0 &&
2858                     subport->pipe_loop == RTE_SCHED_PIPE_INVALID)
2859                         subport->pipe_loop = grinder->pindex;
2860
2861                 grinder_evict(subport, pos);
2862
2863                 /* Look for another active pipe */
2864                 if (grinder_next_pipe(port, subport, pos)) {
2865                         grinder_prefetch_pipe(subport, pos);
2866
2867                         grinder->state = e_GRINDER_PREFETCH_TC_QUEUE_ARRAYS;
2868                         return result;
2869                 }
2870
2871                 /* No active pipe found */
2872                 subport->busy_grinders--;
2873
2874                 grinder->state = e_GRINDER_PREFETCH_PIPE;
2875                 return result;
2876         }
2877
2878         default:
2879                 rte_panic("Algorithmic error (invalid state)\n");
2880                 return 0;
2881         }
2882 }
2883
2884 static inline void
2885 rte_sched_port_time_resync(struct rte_sched_port *port)
2886 {
2887         uint64_t cycles = rte_get_tsc_cycles();
2888         uint64_t cycles_diff;
2889         uint64_t bytes_diff;
2890         uint32_t i;
2891
2892         if (cycles < port->time_cpu_cycles)
2893                 port->time_cpu_cycles = 0;
2894
2895         cycles_diff = cycles - port->time_cpu_cycles;
2896         /* Compute elapsed time in bytes */
2897         bytes_diff = rte_reciprocal_divide(cycles_diff << RTE_SCHED_TIME_SHIFT,
2898                                            port->inv_cycles_per_byte);
2899
2900         /* Advance port time */
2901         port->time_cpu_cycles +=
2902                 (bytes_diff * port->cycles_per_byte) >> RTE_SCHED_TIME_SHIFT;
2903         port->time_cpu_bytes += bytes_diff;
2904         if (port->time < port->time_cpu_bytes)
2905                 port->time = port->time_cpu_bytes;
2906
2907         /* Reset pipe loop detection */
2908         for (i = 0; i < port->n_subports_per_port; i++)
2909                 port->subports[i]->pipe_loop = RTE_SCHED_PIPE_INVALID;
2910 }
2911
2912 static inline int
2913 rte_sched_port_exceptions(struct rte_sched_subport *subport, int second_pass)
2914 {
2915         int exceptions;
2916
2917         /* Check if any exception flag is set */
2918         exceptions = (second_pass && subport->busy_grinders == 0) ||
2919                 (subport->pipe_exhaustion == 1);
2920
2921         /* Clear exception flags */
2922         subport->pipe_exhaustion = 0;
2923
2924         return exceptions;
2925 }
2926
2927 int
2928 rte_sched_port_dequeue(struct rte_sched_port *port, struct rte_mbuf **pkts, uint32_t n_pkts)
2929 {
2930         struct rte_sched_subport *subport;
2931         uint32_t subport_id = port->subport_id;
2932         uint32_t i, n_subports = 0, count;
2933
2934         port->pkts_out = pkts;
2935         port->n_pkts_out = 0;
2936
2937         rte_sched_port_time_resync(port);
2938
2939         /* Take each queue in the grinder one step further */
2940         for (i = 0, count = 0; ; i++)  {
2941                 subport = port->subports[subport_id];
2942
2943                 count += grinder_handle(port, subport,
2944                                 i & (RTE_SCHED_PORT_N_GRINDERS - 1));
2945
2946                 if (count == n_pkts) {
2947                         subport_id++;
2948
2949                         if (subport_id == port->n_subports_per_port)
2950                                 subport_id = 0;
2951
2952                         port->subport_id = subport_id;
2953                         break;
2954                 }
2955
2956                 if (rte_sched_port_exceptions(subport, i >= RTE_SCHED_PORT_N_GRINDERS)) {
2957                         i = 0;
2958                         subport_id++;
2959                         n_subports++;
2960                 }
2961
2962                 if (subport_id == port->n_subports_per_port)
2963                         subport_id = 0;
2964
2965                 if (n_subports == port->n_subports_per_port) {
2966                         port->subport_id = subport_id;
2967                         break;
2968                 }
2969         }
2970
2971         return count;
2972 }