drivers/net/ark/ark_ethdev_rx.c

   1 /* SPDX-License-Identifier: BSD-3-Clause
   2  * Copyright (c) 2015-2018 Atomic Rules LLC
   3  */
   4
   5 #include <unistd.h>
   6
   7 #include "rte_pmd_ark.h"
   8 #include "ark_ethdev_rx.h"
   9 #include "ark_global.h"
  10 #include "ark_logs.h"
  11 #include "ark_mpu.h"
  12 #include "ark_udm.h"
  13
  14 #define ARK_RX_META_SIZE 32
  15 #define ARK_RX_META_OFFSET (RTE_PKTMBUF_HEADROOM - ARK_RX_META_SIZE)
  16 #define ARK_RX_MAX_NOCHAIN (RTE_MBUF_DEFAULT_DATAROOM)
  17
  18 /* Forward declarations */
  19 struct ark_rx_queue;
  20 struct ark_rx_meta;
  21
  22 static void dump_mbuf_data(struct rte_mbuf *mbuf, uint16_t lo, uint16_t hi);
  23 static void ark_ethdev_rx_dump(const char *name, struct ark_rx_queue *queue);
  24 static uint32_t eth_ark_rx_jumbo(struct ark_rx_queue *queue,
  25                                  struct ark_rx_meta *meta,
  26                                  struct rte_mbuf *mbuf0,
  27                                  uint32_t cons_index);
  28 static inline int eth_ark_rx_seed_mbufs(struct ark_rx_queue *queue);
  29
  30 /* ************************************************************************* */
  31 struct ark_rx_queue {
  32         /* array of mbufs to populate */
  33         struct rte_mbuf **reserve_q;
  34         /* array of physical addresses of the mbuf data pointer */
  35         /* This point is a virtual address */
  36         rte_iova_t *paddress_q;
  37         struct rte_mempool *mb_pool;
  38
  39         struct ark_udm_t *udm;
  40         struct ark_mpu_t *mpu;
  41
  42         uint32_t queue_size;
  43         uint32_t queue_mask;
  44
  45         uint32_t seed_index;            /* step 1 set with empty mbuf */
  46         uint32_t cons_index;            /* step 3 consumed by driver */
  47
  48         /* The queue Id is used to identify the HW Q */
  49         uint16_t phys_qid;
  50
  51         /* The queue Index is used within the dpdk device structures */
  52         uint16_t queue_index;
  53
  54         uint32_t unused;
  55
  56         /* separate cache line */
  57         /* second cache line - fields only used in slow path */
  58         RTE_MARKER cacheline1 __rte_cache_min_aligned;
  59
  60         volatile uint32_t prod_index;   /* step 2 filled by FPGA */
  61 } __rte_cache_aligned;
  62
  63 /* ************************************************************************* */
  64 static int
  65 eth_ark_rx_hw_setup(struct rte_eth_dev *dev,
  66                     struct ark_rx_queue *queue,
  67                     uint16_t rx_queue_id __rte_unused, uint16_t rx_queue_idx)
  68 {
  69         rte_iova_t queue_base;
  70         rte_iova_t phys_addr_q_base;
  71         rte_iova_t phys_addr_prod_index;
  72
  73         queue_base = rte_malloc_virt2iova(queue);
  74         phys_addr_prod_index = queue_base +
  75                 offsetof(struct ark_rx_queue, prod_index);
  76
  77         phys_addr_q_base = rte_malloc_virt2iova(queue->paddress_q);
  78
  79         /* Verify HW */
  80         if (ark_mpu_verify(queue->mpu, sizeof(rte_iova_t))) {
  81                 ARK_PMD_LOG(ERR, "Illegal configuration rx queue\n");
  82                 return -1;
  83         }
  84
  85         /* Stop and Reset and configure MPU */
  86         ark_mpu_configure(queue->mpu, phys_addr_q_base, queue->queue_size, 0);
  87
  88         ark_udm_write_addr(queue->udm, phys_addr_prod_index);
  89
  90         /* advance the valid pointer, but don't start until the queue starts */
  91         ark_mpu_reset_stats(queue->mpu);
  92
  93         /* The seed is the producer index for the HW */
  94         ark_mpu_set_producer(queue->mpu, queue->seed_index);
  95         dev->data->rx_queue_state[rx_queue_idx] = RTE_ETH_QUEUE_STATE_STOPPED;
  96
  97         return 0;
  98 }
  99
 100 static inline void
 101 eth_ark_rx_update_cons_index(struct ark_rx_queue *queue, uint32_t cons_index)
 102 {
 103         queue->cons_index = cons_index;
 104         if ((cons_index + queue->queue_size - queue->seed_index) >= 64U) {
 105                 eth_ark_rx_seed_mbufs(queue);
 106                 ark_mpu_set_producer(queue->mpu, queue->seed_index);
 107         }
 108 }
 109
 110 /* ************************************************************************* */
 111 int
 112 eth_ark_dev_rx_queue_setup(struct rte_eth_dev *dev,
 113                            uint16_t queue_idx,
 114                            uint16_t nb_desc,
 115                            unsigned int socket_id,
 116                            const struct rte_eth_rxconf *rx_conf,
 117                            struct rte_mempool *mb_pool)
 118 {
 119         static int warning1;            /* = 0 */
 120         struct ark_adapter *ark = dev->data->dev_private;
 121
 122         struct ark_rx_queue *queue;
 123         uint32_t i;
 124         int status;
 125
 126         int qidx = queue_idx;
 127
 128         /* We may already be setup, free memory prior to re-allocation */
 129         if (dev->data->rx_queues[queue_idx] != NULL) {
 130                 eth_ark_dev_rx_queue_release(dev->data->rx_queues[queue_idx]);
 131                 dev->data->rx_queues[queue_idx] = NULL;
 132         }
 133
 134         if (rx_conf != NULL && warning1 == 0) {
 135                 warning1 = 1;
 136                 ARK_PMD_LOG(NOTICE,
 137                             "Arkville ignores rte_eth_rxconf argument.\n");
 138         }
 139
 140         if (RTE_PKTMBUF_HEADROOM < ARK_RX_META_SIZE) {
 141                 ARK_PMD_LOG(ERR,
 142                             "Error: DPDK Arkville requires head room > %d bytes (%s)\n",
 143                             ARK_RX_META_SIZE, __func__);
 144                 return -1;              /* ERROR CODE */
 145         }
 146
 147         if (!rte_is_power_of_2(nb_desc)) {
 148                 ARK_PMD_LOG(ERR,
 149                             "DPDK Arkville configuration queue size must be power of two %u (%s)\n",
 150                             nb_desc, __func__);
 151                 return -1;              /* ERROR CODE */
 152         }
 153
 154         /* Allocate queue struct */
 155         queue = rte_zmalloc_socket("Ark_rxqueue",
 156                                    sizeof(struct ark_rx_queue),
 157                                    64,
 158                                    socket_id);
 159         if (queue == 0) {
 160                 ARK_PMD_LOG(ERR, "Failed to allocate memory in %s\n", __func__);
 161                 return -ENOMEM;
 162         }
 163
 164         /* NOTE zmalloc is used, no need to 0 indexes, etc. */
 165         queue->mb_pool = mb_pool;
 166         queue->phys_qid = qidx;
 167         queue->queue_index = queue_idx;
 168         queue->queue_size = nb_desc;
 169         queue->queue_mask = nb_desc - 1;
 170
 171         queue->reserve_q =
 172                 rte_zmalloc_socket("Ark_rx_queue mbuf",
 173                                    nb_desc * sizeof(struct rte_mbuf *),
 174                                    64,
 175                                    socket_id);
 176         queue->paddress_q =
 177                 rte_zmalloc_socket("Ark_rx_queue paddr",
 178                                    nb_desc * sizeof(rte_iova_t),
 179                                    64,
 180                                    socket_id);
 181
 182         if (queue->reserve_q == 0 || queue->paddress_q == 0) {
 183                 ARK_PMD_LOG(ERR,
 184                             "Failed to allocate queue memory in %s\n",
 185                             __func__);
 186                 rte_free(queue->reserve_q);
 187                 rte_free(queue->paddress_q);
 188                 rte_free(queue);
 189                 return -ENOMEM;
 190         }
 191
 192         dev->data->rx_queues[queue_idx] = queue;
 193         queue->udm = RTE_PTR_ADD(ark->udm.v, qidx * ARK_UDM_QOFFSET);
 194         queue->mpu = RTE_PTR_ADD(ark->mpurx.v, qidx * ARK_MPU_QOFFSET);
 195
 196         /* populate mbuf reserve */
 197         status = eth_ark_rx_seed_mbufs(queue);
 198
 199         if (queue->seed_index != nb_desc) {
 200                 ARK_PMD_LOG(ERR, "Failed to allocate %u mbufs for RX queue %d\n",
 201                             nb_desc, qidx);
 202                 status = -1;
 203         }
 204         /* MPU Setup */
 205         if (status == 0)
 206                 status = eth_ark_rx_hw_setup(dev, queue, qidx, queue_idx);
 207
 208         if (unlikely(status != 0)) {
 209                 struct rte_mbuf **mbuf;
 210
 211                 ARK_PMD_LOG(ERR, "Failed to initialize RX queue %d %s\n",
 212                             qidx,
 213                             __func__);
 214                 /* Free the mbufs allocated */
 215                 for (i = 0, mbuf = queue->reserve_q;
 216                      i < queue->seed_index; ++i, mbuf++) {
 217                         rte_pktmbuf_free(*mbuf);
 218                 }
 219                 rte_free(queue->reserve_q);
 220                 rte_free(queue->paddress_q);
 221                 rte_free(queue);
 222                 return -1;              /* ERROR CODE */
 223         }
 224
 225         return 0;
 226 }
 227
 228 /* ************************************************************************* */
 229 uint16_t
 230 eth_ark_recv_pkts_noop(void *rx_queue __rte_unused,
 231                        struct rte_mbuf **rx_pkts __rte_unused,
 232                        uint16_t nb_pkts __rte_unused)
 233 {
 234         return 0;
 235 }
 236
 237 /* ************************************************************************* */
 238 uint16_t
 239 eth_ark_recv_pkts(void *rx_queue,
 240                   struct rte_mbuf **rx_pkts,
 241                   uint16_t nb_pkts)
 242 {
 243         struct ark_rx_queue *queue;
 244         register uint32_t cons_index, prod_index;
 245         uint16_t nb;
 246         struct rte_mbuf *mbuf;
 247         struct ark_rx_meta *meta;
 248
 249         queue = (struct ark_rx_queue *)rx_queue;
 250         if (unlikely(queue == 0))
 251                 return 0;
 252         if (unlikely(nb_pkts == 0))
 253                 return 0;
 254         prod_index = queue->prod_index;
 255         cons_index = queue->cons_index;
 256         nb = 0;
 257
 258         while (prod_index != cons_index) {
 259                 mbuf = queue->reserve_q[cons_index & queue->queue_mask];
 260                 /* prefetch mbuf */
 261                 rte_mbuf_prefetch_part1(mbuf);
 262                 rte_mbuf_prefetch_part2(mbuf);
 263
 264                 /* META DATA embedded in headroom */
 265                 meta = RTE_PTR_ADD(mbuf->buf_addr, ARK_RX_META_OFFSET);
 266
 267                 mbuf->pkt_len = meta->pkt_len;
 268                 mbuf->data_len = meta->pkt_len;
 269                 /* set timestamp if enabled at least on one device */
 270                 if (ark_timestamp_rx_dynflag > 0) {
 271                         *RTE_MBUF_DYNFIELD(mbuf, ark_timestamp_dynfield_offset,
 272                                 rte_mbuf_timestamp_t *) = meta->timestamp;
 273                         mbuf->ol_flags |= ark_timestamp_rx_dynflag;
 274                 }
 275                 rte_pmd_ark_mbuf_rx_userdata_set(mbuf, meta->user_data);
 276
 277                 if (ARK_DEBUG_CORE) {   /* debug sanity checks */
 278                         if ((meta->pkt_len > (1024 * 16)) ||
 279                             (meta->pkt_len == 0)) {
 280                                 ARK_PMD_LOG(DEBUG, "RX: Bad Meta Q: %u"
 281                                            " cons: %" PRIU32
 282                                            " prod: %" PRIU32
 283                                            " seed_index %" PRIU32
 284                                            "\n",
 285                                            queue->phys_qid,
 286                                            cons_index,
 287                                            queue->prod_index,
 288                                            queue->seed_index);
 289
 290
 291                                 ARK_PMD_LOG(DEBUG, "       :  UDM"
 292                                            " prod: %" PRIU32
 293                                            " len: %u\n",
 294                                            queue->udm->rt_cfg.prod_idx,
 295                                            meta->pkt_len);
 296                                 ark_mpu_dump(queue->mpu,
 297                                              "    ",
 298                                              queue->phys_qid);
 299                                 dump_mbuf_data(mbuf, 0, 256);
 300                                 /* its FUBAR so fix it */
 301                                 mbuf->pkt_len = 63;
 302                                 meta->pkt_len = 63;
 303                         }
 304                 }
 305
 306                 if (unlikely(meta->pkt_len > ARK_RX_MAX_NOCHAIN))
 307                         cons_index = eth_ark_rx_jumbo
 308                                 (queue, meta, mbuf, cons_index + 1);
 309                 else
 310                         cons_index += 1;
 311
 312                 rx_pkts[nb] = mbuf;
 313                 nb++;
 314                 if (nb >= nb_pkts)
 315                         break;
 316         }
 317
 318         eth_ark_rx_update_cons_index(queue, cons_index);
 319
 320         return nb;
 321 }
 322
 323 /* ************************************************************************* */
 324 static uint32_t
 325 eth_ark_rx_jumbo(struct ark_rx_queue *queue,
 326                  struct ark_rx_meta *meta,
 327                  struct rte_mbuf *mbuf0,
 328                  uint32_t cons_index)
 329 {
 330         struct rte_mbuf *mbuf_prev;
 331         struct rte_mbuf *mbuf;
 332
 333         uint16_t remaining;
 334         uint16_t data_len;
 335         uint16_t segments;
 336
 337         /* first buf populated by called */
 338         mbuf_prev = mbuf0;
 339         segments = 1;
 340         data_len = RTE_MIN(meta->pkt_len, RTE_MBUF_DEFAULT_DATAROOM);
 341         remaining = meta->pkt_len - data_len;
 342         mbuf0->data_len = data_len;
 343
 344         /* HW guarantees that the data does not exceed prod_index! */
 345         while (remaining != 0) {
 346                 data_len = RTE_MIN(remaining,
 347                                    RTE_MBUF_DEFAULT_DATAROOM);
 348
 349                 remaining -= data_len;
 350                 segments += 1;
 351
 352                 mbuf = queue->reserve_q[cons_index & queue->queue_mask];
 353                 mbuf_prev->next = mbuf;
 354                 mbuf_prev = mbuf;
 355                 mbuf->data_len = data_len;
 356
 357                 cons_index += 1;
 358         }
 359
 360         mbuf0->nb_segs = segments;
 361         return cons_index;
 362 }
 363
 364 /* Drain the internal queue allowing hw to clear out. */
 365 static void
 366 eth_ark_rx_queue_drain(struct ark_rx_queue *queue)
 367 {
 368         register uint32_t cons_index;
 369         struct rte_mbuf *mbuf;
 370
 371         cons_index = queue->cons_index;
 372
 373         /* NOT performance optimized, since this is a one-shot call */
 374         while ((cons_index ^ queue->prod_index) & queue->queue_mask) {
 375                 mbuf = queue->reserve_q[cons_index & queue->queue_mask];
 376                 rte_pktmbuf_free(mbuf);
 377                 cons_index++;
 378                 eth_ark_rx_update_cons_index(queue, cons_index);
 379         }
 380 }
 381
 382 uint32_t
 383 eth_ark_dev_rx_queue_count(struct rte_eth_dev *dev, uint16_t queue_id)
 384 {
 385         struct ark_rx_queue *queue;
 386
 387         queue = dev->data->rx_queues[queue_id];
 388         return (queue->prod_index - queue->cons_index); /* mod arith */
 389 }
 390
 391 /* ************************************************************************* */
 392 int
 393 eth_ark_rx_start_queue(struct rte_eth_dev *dev, uint16_t queue_id)
 394 {
 395         struct ark_rx_queue *queue;
 396
 397         queue = dev->data->rx_queues[queue_id];
 398         if (queue == 0)
 399                 return -1;
 400
 401         dev->data->rx_queue_state[queue_id] = RTE_ETH_QUEUE_STATE_STARTED;
 402
 403         ark_mpu_set_producer(queue->mpu, queue->seed_index);
 404         ark_mpu_start(queue->mpu);
 405
 406         ark_udm_queue_enable(queue->udm, 1);
 407
 408         return 0;
 409 }
 410
 411 /* ************************************************************************* */
 412
 413 /* Queue can be restarted.   data remains
 414  */
 415 int
 416 eth_ark_rx_stop_queue(struct rte_eth_dev *dev, uint16_t queue_id)
 417 {
 418         struct ark_rx_queue *queue;
 419
 420         queue = dev->data->rx_queues[queue_id];
 421         if (queue == 0)
 422                 return -1;
 423
 424         ark_udm_queue_enable(queue->udm, 0);
 425
 426         dev->data->rx_queue_state[queue_id] = RTE_ETH_QUEUE_STATE_STOPPED;
 427
 428         return 0;
 429 }
 430
 431 /* ************************************************************************* */
 432 static inline int
 433 eth_ark_rx_seed_mbufs(struct ark_rx_queue *queue)
 434 {
 435         uint32_t limit = queue->cons_index + queue->queue_size;
 436         uint32_t seed_index = queue->seed_index;
 437
 438         uint32_t count = 0;
 439         uint32_t seed_m = queue->seed_index & queue->queue_mask;
 440
 441         uint32_t nb = limit - seed_index;
 442
 443         /* Handle wrap around -- remainder is filled on the next call */
 444         if (unlikely(seed_m + nb > queue->queue_size))
 445                 nb = queue->queue_size - seed_m;
 446
 447         struct rte_mbuf **mbufs = &queue->reserve_q[seed_m];
 448         int status = rte_pktmbuf_alloc_bulk(queue->mb_pool, mbufs, nb);
 449
 450         if (unlikely(status != 0)) {
 451                 ARK_PMD_LOG(NOTICE,
 452                             "Could not allocate %u mbufs from pool"
 453                             " for RX queue %u;"
 454                             " %u free buffers remaining in queue\n",
 455                             nb, queue->queue_index,
 456                             queue->seed_index - queue->cons_index);
 457                 return -1;
 458         }
 459
 460         if (ARK_DEBUG_CORE) {           /* DEBUG */
 461                 while (count != nb) {
 462                         struct rte_mbuf *mbuf_init =
 463                                 queue->reserve_q[seed_m + count];
 464
 465                         memset(mbuf_init->buf_addr, -1, 512);
 466                         *((uint32_t *)mbuf_init->buf_addr) =
 467                                 seed_index + count;
 468                         *(uint16_t *)RTE_PTR_ADD(mbuf_init->buf_addr, 4) =
 469                                 queue->phys_qid;
 470                         count++;
 471                 }
 472                 count = 0;
 473         } /* DEBUG */
 474         queue->seed_index += nb;
 475
 476         /* Duff's device https://en.wikipedia.org/wiki/Duff's_device */
 477         switch (nb % 4) {
 478         case 0:
 479                 while (count != nb) {
 480                         queue->paddress_q[seed_m++] =
 481                                 (*mbufs++)->buf_iova;
 482                         count++;
 483                 /* FALLTHROUGH */
 484         case 3:
 485                 queue->paddress_q[seed_m++] =
 486                         (*mbufs++)->buf_iova;
 487                 count++;
 488                 /* FALLTHROUGH */
 489         case 2:
 490                 queue->paddress_q[seed_m++] =
 491                         (*mbufs++)->buf_iova;
 492                 count++;
 493                 /* FALLTHROUGH */
 494         case 1:
 495                 queue->paddress_q[seed_m++] =
 496                         (*mbufs++)->buf_iova;
 497                 count++;
 498                 /* FALLTHROUGH */
 499
 500                 } /* while (count != nb) */
 501         } /* switch */
 502
 503         return 0;
 504 }
 505
 506 void
 507 eth_ark_rx_dump_queue(struct rte_eth_dev *dev, uint16_t queue_id,
 508                       const char *msg)
 509 {
 510         struct ark_rx_queue *queue;
 511
 512         queue = dev->data->rx_queues[queue_id];
 513
 514         ark_ethdev_rx_dump(msg, queue);
 515 }
 516
 517 /* ************************************************************************* */
 518 /* Call on device closed no user API, queue is stopped */
 519 void
 520 eth_ark_dev_rx_queue_release(void *vqueue)
 521 {
 522         struct ark_rx_queue *queue;
 523         uint32_t i;
 524
 525         queue = (struct ark_rx_queue *)vqueue;
 526         if (queue == 0)
 527                 return;
 528
 529         ark_udm_queue_enable(queue->udm, 0);
 530         /* Stop the MPU since pointer are going away */
 531         ark_mpu_stop(queue->mpu);
 532
 533         /* Need to clear out mbufs here, dropping packets along the way */
 534         eth_ark_rx_queue_drain(queue);
 535
 536         for (i = 0; i < queue->queue_size; ++i)
 537                 rte_pktmbuf_free(queue->reserve_q[i]);
 538
 539         rte_free(queue->reserve_q);
 540         rte_free(queue->paddress_q);
 541         rte_free(queue);
 542 }
 543
 544 void
 545 eth_rx_queue_stats_get(void *vqueue, struct rte_eth_stats *stats)
 546 {
 547         struct ark_rx_queue *queue;
 548         struct ark_udm_t *udm;
 549
 550         queue = vqueue;
 551         if (queue == 0)
 552                 return;
 553         udm = queue->udm;
 554
 555         uint64_t ibytes = ark_udm_bytes(udm);
 556         uint64_t ipackets = ark_udm_packets(udm);
 557         uint64_t idropped = ark_udm_dropped(queue->udm);
 558
 559         stats->q_ipackets[queue->queue_index] = ipackets;
 560         stats->q_ibytes[queue->queue_index] = ibytes;
 561         stats->q_errors[queue->queue_index] = idropped;
 562         stats->ipackets += ipackets;
 563         stats->ibytes += ibytes;
 564         stats->imissed += idropped;
 565 }
 566
 567 void
 568 eth_rx_queue_stats_reset(void *vqueue)
 569 {
 570         struct ark_rx_queue *queue;
 571
 572         queue = vqueue;
 573         if (queue == 0)
 574                 return;
 575
 576         ark_mpu_reset_stats(queue->mpu);
 577         ark_udm_queue_stats_reset(queue->udm);
 578 }
 579
 580 void
 581 eth_ark_udm_force_close(struct rte_eth_dev *dev)
 582 {
 583         struct ark_adapter *ark = dev->data->dev_private;
 584         struct ark_rx_queue *queue;
 585         uint32_t index;
 586         uint16_t i;
 587
 588         if (!ark_udm_is_flushed(ark->udm.v)) {
 589                 /* restart the MPUs */
 590                 ARK_PMD_LOG(NOTICE, "UDM not flushed -- forcing flush\n");
 591                 for (i = 0; i < dev->data->nb_rx_queues; i++) {
 592                         queue = (struct ark_rx_queue *)dev->data->rx_queues[i];
 593                         if (queue == 0)
 594                                 continue;
 595
 596                         ark_mpu_start(queue->mpu);
 597                         /* Add some buffers */
 598                         index = 100000 + queue->seed_index;
 599                         ark_mpu_set_producer(queue->mpu, index);
 600                 }
 601                 /* Wait to allow data to pass */
 602                 usleep(100);
 603
 604                 ARK_PMD_LOG(DEBUG, "UDM forced flush attempt, stopped = %d\n",
 605                                 ark_udm_is_flushed(ark->udm.v));
 606         }
 607         ark_udm_reset(ark->udm.v);
 608 }
 609
 610 static void
 611 ark_ethdev_rx_dump(const char *name, struct ark_rx_queue *queue)
 612 {
 613         if (queue == NULL)
 614                 return;
 615         ARK_PMD_LOG(DEBUG, "RX QUEUE %d -- %s", queue->phys_qid, name);
 616         ARK_PMD_LOG(DEBUG, ARK_SU32 ARK_SU32 ARK_SU32 ARK_SU32 "\n",
 617                         "queue_size", queue->queue_size,
 618                         "seed_index", queue->seed_index,
 619                         "prod_index", queue->prod_index,
 620                         "cons_index", queue->cons_index);
 621
 622         ark_mpu_dump(queue->mpu, name, queue->phys_qid);
 623         ark_mpu_dump_setup(queue->mpu, queue->phys_qid);
 624         ark_udm_dump(queue->udm, name);
 625         ark_udm_dump_setup(queue->udm, queue->phys_qid);
 626 }
 627
 628 /* Only used in debug.
 629  * This function is a raw memory dump of a portion of an mbuf's memory
 630  * region.  The usual function, rte_pktmbuf_dump() only shows data
 631  * with respect to the data_off field.  This function show data
 632  * anywhere in the mbuf's buffer.  This is useful for examining
 633  * data in the headroom or tailroom portion of an mbuf.
 634  */
 635 static void
 636 dump_mbuf_data(struct rte_mbuf *mbuf, uint16_t lo, uint16_t hi)
 637 {
 638         uint16_t i, j;
 639
 640         ARK_PMD_LOG(DEBUG, " MBUF: %p len %d, off: %d\n",
 641                     mbuf, mbuf->pkt_len, mbuf->data_off);
 642         for (i = lo; i < hi; i += 16) {
 643                 uint8_t *dp = RTE_PTR_ADD(mbuf->buf_addr, i);
 644
 645                 ARK_PMD_LOG(DEBUG, "  %6d:  ", i);
 646                 for (j = 0; j < 16; j++)
 647                         ARK_PMD_LOG(DEBUG, " %02x", dp[j]);
 648
 649                 ARK_PMD_LOG(DEBUG, "\n");
 650         }
 651 }