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