aboutsummaryrefslogtreecommitdiffstats
path: root/src/plugins/dpdk/buffer.c
blob: 31e8eee25a930fcf73d3df5aaa52608961c31403 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
/*
 * Copyright (c) 2017 Cisco and/or its affiliates.
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at:
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
/*
 * buffer.c: allocate/free network buffers.
 *
 * Copyright (c) 2008 Eliot Dresselhaus
 *
 * Permission is hereby granted, free of charge, to any person obtaining
 * a copy of this software and associated documentation files (the
 * "Software"), to deal in the Software without restriction, including
 * without limitation the rights to use, copy, modify, merge, publish,
 * distribute, sublicense, and/or sell copies of the Software, and to
 * permit persons to whom the Software is furnished to do so, subject to
 * the following conditions:
 *
 * The above copyright notice and this permission notice shall be
 * included in all copies or substantial portions of the Software.
 *
 *  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 *  EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 *  MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
 *  NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
 *  LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
 *  OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
 *  WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 */

/**
 * @file
 *
 * Allocate/free network buffers.
 */

#include <unistd.h>
#include <linux/vfio.h>
#include <sys/ioctl.h>

#include <rte_config.h>

#include <rte_common.h>
#include <rte_log.h>
#include <rte_memory.h>
#include <rte_memzone.h>
#include <rte_tailq.h>
#include <rte_eal.h>
#include <rte_per_lcore.h>
#include <rte_launch.h>
#include <rte_atomic.h>
#include <rte_cycles.h>
#include <rte_prefetch.h>
#include <rte_lcore.h>
#include <rte_per_lcore.h>
#include <rte_branch_prediction.h>
#include <rte_interrupts.h>
#include <rte_pci.h>
#include <rte_random.h>
#include <rte_debug.h>
#include <rte_ether.h>
#include <rte_ethdev.h>
#include <rte_ring.h>
#include <rte_mempool.h>
#include <rte_mbuf.h>
#include <rte_version.h>

#include <vlib/vlib.h>
#include <vlib/unix/unix.h>
#include <vlib/pci/pci.h>
#include <vlib/linux/vfio.h>
#include <vnet/vnet.h>
#include <dpdk/device/dpdk.h>
#include <dpdk/device/dpdk_priv.h>

STATIC_ASSERT (VLIB_BUFFER_PRE_DATA_SIZE == RTE_PKTMBUF_HEADROOM,
	       "VLIB_BUFFER_PRE_DATA_SIZE must be equal to RTE_PKTMBUF_HEADROOM");

typedef struct
{
  CLIB_CACHE_LINE_ALIGN_MARK (cacheline0);
  struct rte_mbuf **mbuf_alloc_list;
} dpdk_buffer_per_thread_data;

typedef struct
{
  int vfio_container_fd;
  dpdk_buffer_per_thread_data *ptd;
} dpdk_buffer_main_t;

dpdk_buffer_main_t dpdk_buffer_main;

static_always_inline void
dpdk_rte_pktmbuf_free (vlib_main_t * vm, u32 thread_index, vlib_buffer_t * b,
		       int maybe_next)
{
  struct rte_mbuf *mb;
  u32 next, flags;

next:
  flags = b->flags;
  next = b->next_buffer;
  mb = rte_mbuf_from_vlib_buffer (b);

  if (PREDICT_FALSE (b->n_add_refs))
    {
      rte_mbuf_refcnt_update (mb, b->n_add_refs);
      b->n_add_refs = 0;
    }

  if ((mb = rte_pktmbuf_prefree_seg (mb)))
    rte_mempool_put (mb->pool, mb);

  if (maybe_next && (flags & VLIB_BUFFER_NEXT_PRESENT))
    {
      b = vlib_get_buffer (vm, next);
      goto next;
    }
}

#ifndef CLIB_MARCH_VARIANT
static void
del_free_list (vlib_main_t * vm, vlib_buffer_free_list_t * f)
{
  u32 i;
  vlib_buffer_t *b;
  u32 thread_index = vlib_get_thread_index ();

  for (i = 0; i < vec_len (f->buffers); i++)
    {
      b = vlib_get_buffer (vm, f->buffers[i]);
      dpdk_rte_pktmbuf_free (vm, thread_index, b, 1);
    }

  vec_free (f->name);
  vec_free (f->buffers);
  /* Poison it. */
  memset (f, 0xab, sizeof (f[0]));
}

/* Add buffer free list. */
static void
dpdk_buffer_delete_free_list (vlib_main_t * vm,
			      vlib_buffer_free_list_index_t free_list_index)
{
  vlib_buffer_free_list_t *f;
  int i;

  ASSERT (vlib_get_thread_index () == 0);

  f = vlib_buffer_get_free_list (vm, free_list_index);

  del_free_list (vm, f);

  pool_put (vm->buffer_free_list_pool, f);

  for (i = 1; i < vec_len (vlib_mains); i++)
    {
      vlib_main_t *wvm = vlib_mains[i];
      f = vlib_buffer_get_free_list (vlib_mains[i], free_list_index);
      del_free_list (wvm, f);
      pool_put (wvm->buffer_free_list_pool, f);
    }
}
#endif

/* Make sure free list has at least given number of free buffers. */
uword
CLIB_MULTIARCH_FN (dpdk_buffer_fill_free_list) (vlib_main_t * vm,
						vlib_buffer_free_list_t * fl,
						uword min_free_buffers)
{
  dpdk_main_t *dm = &dpdk_main;
  dpdk_buffer_main_t *dbm = &dpdk_buffer_main;
  struct rte_mbuf **mb;
  uword n_left, first;
  word n_alloc;
  unsigned socket_id = rte_socket_id ();
  u32 thread_index = vlib_get_thread_index ();
  dpdk_buffer_per_thread_data *d = vec_elt_at_index (dbm->ptd, thread_index);
  struct rte_mempool *rmp = dm->pktmbuf_pools[socket_id];
  dpdk_mempool_private_t *privp = rte_mempool_get_priv (rmp);
  vlib_buffer_t bt;
  u32 *bi;

  /* Too early? */
  if (PREDICT_FALSE (rmp == 0))
    return 0;

  /* Already have enough free buffers on free list? */
  n_alloc = min_free_buffers - vec_len (fl->buffers);
  if (n_alloc <= 0)
    return min_free_buffers;

  /* Always allocate round number of buffers. */
  n_alloc = round_pow2 (n_alloc, CLIB_CACHE_LINE_BYTES / sizeof (u32));

  /* Always allocate new buffers in reasonably large sized chunks. */
  n_alloc = clib_max (n_alloc, fl->min_n_buffers_each_alloc);

  vec_validate_aligned (d->mbuf_alloc_list, n_alloc - 1,
			CLIB_CACHE_LINE_BYTES);

  if (rte_mempool_get_bulk (rmp, (void *) d->mbuf_alloc_list, n_alloc) < 0)
    return 0;

  memset (&bt, 0, sizeof (vlib_buffer_t));
  vlib_buffer_init_for_free_list (&bt, fl);
  bt.buffer_pool_index = privp->buffer_pool_index;

  _vec_len (d->mbuf_alloc_list) = n_alloc;

  first = vec_len (fl->buffers);
  vec_resize_aligned (fl->buffers, n_alloc, CLIB_CACHE_LINE_BYTES);

  n_left = n_alloc;
  mb = d->mbuf_alloc_list;
  bi = fl->buffers + first;

  ASSERT (n_left % 8 == 0);

  while (n_left >= 8)
    {
      if (PREDICT_FALSE (n_left < 24))
	goto no_prefetch;

      vlib_prefetch_buffer_header (vlib_buffer_from_rte_mbuf (mb[16]), STORE);
      vlib_prefetch_buffer_header (vlib_buffer_from_rte_mbuf (mb[17]), STORE);
      vlib_prefetch_buffer_header (vlib_buffer_from_rte_mbuf (mb[18]), STORE);
      vlib_prefetch_buffer_header (vlib_buffer_from_rte_mbuf (mb[19]), STORE);
      vlib_prefetch_buffer_header (vlib_buffer_from_rte_mbuf (mb[20]), STORE);
      vlib_prefetch_buffer_header (vlib_buffer_from_rte_mbuf (mb[21]), STORE);
      vlib_prefetch_buffer_header (vlib_buffer_from_rte_mbuf (mb[22]), STORE);
      vlib_prefetch_buffer_header (vlib_buffer_from_rte_mbuf (mb[23]), STORE);

    no_prefetch:
      vlib_get_buffer_indices_with_offset (vm, (void **) mb, bi, 8,
					   sizeof (struct rte_mbuf));
      clib_memcpy64_x4 (vlib_buffer_from_rte_mbuf (mb[0]),
			vlib_buffer_from_rte_mbuf (mb[1]),
			vlib_buffer_from_rte_mbuf (mb[2]),
			vlib_buffer_from_rte_mbuf (mb[3]), &bt);
      clib_memcpy64_x4 (vlib_buffer_from_rte_mbuf (mb[4]),
			vlib_buffer_from_rte_mbuf (mb[5]),
			vlib_buffer_from_rte_mbuf (mb[6]),
			vlib_buffer_from_rte_mbuf (mb[7]), &bt);

      n_left -= 8;
      mb += 8;
      bi += 8;
    }

  if (fl->buffer_init_function)
    fl->buffer_init_function (vm, fl, fl->buffers + first, n_alloc);

  fl->n_alloc += n_alloc;

  return n_alloc;
}

static_always_inline void
dpdk_prefetch_buffer (vlib_buffer_t * b)
{
  struct rte_mbuf *mb;
  mb = rte_mbuf_from_vlib_buffer (b);
  CLIB_PREFETCH (mb, 2 * CLIB_CACHE_LINE_BYTES, LOAD);
  CLIB_PREFETCH (b, CLIB_CACHE_LINE_BYTES, LOAD);
}

static_always_inline void
recycle_or_free (vlib_main_t * vm, vlib_buffer_main_t * bm, u32 bi,
		 vlib_buffer_t * b)
{
  vlib_buffer_free_list_t *fl;
  u32 thread_index = vlib_get_thread_index ();
  vlib_buffer_free_list_index_t fi;
  fl = vlib_buffer_get_buffer_free_list (vm, b, &fi);

  /* The only current use of this callback: multicast recycle */
  if (PREDICT_FALSE (fl->buffers_added_to_freelist_function != 0))
    {
      int j;

      vlib_buffer_add_to_free_list (vm, fl, bi,
				    (b->flags & VLIB_BUFFER_RECYCLE) == 0);

      for (j = 0; j < vec_len (vm->buffer_announce_list); j++)
	{
	  if (fl == vm->buffer_announce_list[j])
	    goto already_announced;
	}
      vec_add1 (vm->buffer_announce_list, fl);
    already_announced:
      ;
    }
  else if (PREDICT_TRUE ((b->flags & VLIB_BUFFER_RECYCLE) == 0))
    dpdk_rte_pktmbuf_free (vm, thread_index, b, 1);
}

static_always_inline void
vlib_buffer_free_inline (vlib_main_t * vm,
			 u32 * buffers, u32 n_buffers, u32 follow_buffer_next)
{
  vlib_buffer_main_t *bm = &buffer_main;
  vlib_buffer_t *bufp[n_buffers], **b = bufp;
  u32 thread_index = vlib_get_thread_index ();
  int i = 0;
  u32 simple_mask = (VLIB_BUFFER_NON_DEFAULT_FREELIST | VLIB_BUFFER_RECYCLE |
		     VLIB_BUFFER_NEXT_PRESENT);
  u32 n_left, *bi;
  u32 (*cb) (vlib_main_t * vm, u32 * buffers, u32 n_buffers,
	     u32 follow_buffer_next);

  cb = bm->buffer_free_callback;

  if (PREDICT_FALSE (cb != 0))
    n_buffers = (*cb) (vm, buffers, n_buffers, follow_buffer_next);

  if (!n_buffers)
    return;

  n_left = n_buffers;
  bi = buffers;
  b = bufp;
  vlib_get_buffers (vm, bi, b, n_buffers);

  while (n_left >= 4)
    {
      u32 or_flags;
      vlib_buffer_t **p;

      if (n_left < 16)
	goto no_prefetch;

      p = b + 12;
      dpdk_prefetch_buffer (p[0]);
      dpdk_prefetch_buffer (p[1]);
      dpdk_prefetch_buffer (p[2]);
      dpdk_prefetch_buffer (p[3]);
    no_prefetch:

      for (i = 0; i < 4; i++)
	VLIB_BUFFER_TRACE_TRAJECTORY_INIT (b[i]);

      or_flags = b[0]->flags | b[1]->flags | b[2]->flags | b[3]->flags;

      if (or_flags & simple_mask)
	{
	  recycle_or_free (vm, bm, bi[0], b[0]);
	  recycle_or_free (vm, bm, bi[1], b[1]);
	  recycle_or_free (vm, bm, bi[2], b[2]);
	  recycle_or_free (vm, bm, bi[3], b[3]);
	}
      else
	{
	  dpdk_rte_pktmbuf_free (vm, thread_index, b[0], 0);
	  dpdk_rte_pktmbuf_free (vm, thread_index, b[1], 0);
	  dpdk_rte_pktmbuf_free (vm, thread_index, b[2], 0);
	  dpdk_rte_pktmbuf_free (vm, thread_index, b[3], 0);
	}
      bi += 4;
      b += 4;
      n_left -= 4;
    }
  while (n_left)
    {
      VLIB_BUFFER_TRACE_TRAJECTORY_INIT (b[0]);
      recycle_or_free (vm, bm, bi[0], b[0]);
      bi += 1;
      b += 1;
      n_left -= 1;
    }
  if (vec_len (vm->buffer_announce_list))
    {
      vlib_buffer_free_list_t *fl;
      for (i = 0; i < vec_len (vm->buffer_announce_list); i++)
	{
	  fl = vm->buffer_announce_list[i];
	  fl->buffers_added_to_freelist_function (vm, fl);
	}
      _vec_len (vm->buffer_announce_list) = 0;
    }
}

void
CLIB_MULTIARCH_FN (dpdk_buffer_free) (vlib_main_t * vm, u32 * buffers,
				      u32 n_buffers)
{
  vlib_buffer_free_inline (vm, buffers, n_buffers,	/* follow_buffer_next */
			   1);
}

void
CLIB_MULTIARCH_FN (dpdk_buffer_free_no_next) (vlib_main_t * vm, u32 * buffers,
					      u32 n_buffers)
{
  vlib_buffer_free_inline (vm, buffers, n_buffers,	/* follow_buffer_next */
			   0);
}

#ifndef CLIB_MARCH_VARIANT
static void
dpdk_packet_template_init (vlib_main_t * vm,
			   void *vt,
			   void *packet_data,
			   uword n_packet_data_bytes,
			   uword min_n_buffers_each_alloc, u8 * name)
{
  vlib_packet_template_t *t = (vlib_packet_template_t *) vt;

  vlib_worker_thread_barrier_sync (vm);
  memset (t, 0, sizeof (t[0]));

  vec_add (t->packet_data, packet_data, n_packet_data_bytes);

  vlib_worker_thread_barrier_release (vm);
}

static clib_error_t *
scan_vfio_fd (void *arg, u8 * path_name, u8 * file_name)
{
  dpdk_buffer_main_t *dbm = &dpdk_buffer_main;
  linux_vfio_main_t *lvm = &vfio_main;
  const char fn[] = "/dev/vfio/vfio";
  char buff[sizeof (fn)] = { 0 };
  int fd;
  u8 *path = format (0, "%v%c", path_name, 0);

  if (readlink ((char *) path, buff, sizeof (fn)) + 1 != sizeof (fn))
    goto done;

  if (strncmp (fn, buff, sizeof (fn)))
    goto done;

  fd = atoi ((char *) file_name);
  if (fd != lvm->container_fd)
    dbm->vfio_container_fd = fd;

done:
  vec_free (path);
  return 0;
}

clib_error_t *
dpdk_pool_create (vlib_main_t * vm, u8 * pool_name, u32 elt_size,
		  u32 num_elts, u32 pool_priv_size, u16 cache_size, u8 numa,
		  struct rte_mempool ** _mp,
		  vlib_physmem_region_index_t * pri)
{
  dpdk_buffer_main_t *dbm = &dpdk_buffer_main;
  struct rte_mempool *mp;
  vlib_physmem_region_t *pr;
  dpdk_mempool_private_t priv;
  clib_error_t *error = 0;
  u32 size, obj_size;
  i32 ret;

  obj_size = rte_mempool_calc_obj_size (elt_size, 0, 0);
  size = rte_mempool_xmem_size (num_elts, obj_size, 21, 0);

  error =
    vlib_physmem_region_alloc (vm, (char *) pool_name, size, numa,
			       VLIB_PHYSMEM_F_HUGETLB | VLIB_PHYSMEM_F_SHARED,
			       pri);
  if (error)
    return error;

  pr = vlib_physmem_get_region (vm, pri[0]);

  mp =
    rte_mempool_create_empty ((char *) pool_name, num_elts, elt_size,
			      512, pool_priv_size, numa, 0);
  if (!mp)
    return clib_error_return (0, "failed to create %s", pool_name);

  rte_mempool_set_ops_byname (mp, RTE_MBUF_DEFAULT_MEMPOOL_OPS, NULL);

  /* Call the mempool priv initializer */
  priv.mbp_priv.mbuf_data_room_size = VLIB_BUFFER_PRE_DATA_SIZE +
    VLIB_BUFFER_DATA_SIZE;
  priv.mbp_priv.mbuf_priv_size = VLIB_BUFFER_HDR_SIZE;
  rte_pktmbuf_pool_init (mp, &priv);

  ret =
    rte_mempool_populate_iova_tab (mp, pr->mem, pr->page_table, pr->n_pages,
				   pr->log2_page_size, NULL, NULL);
  if (ret != (i32) mp->size)
    {
      rte_mempool_free (mp);
      return clib_error_return (0, "failed to populate %s", pool_name);
    }

  _mp[0] = mp;

  /* DPDK currently doesn't provide API to map DMA memory for empty mempool
     so we are using this hack, will be nice to have at least API to get
     VFIO container FD */
  if (dbm->vfio_container_fd == -1)
    foreach_directory_file ("/proc/self/fd", scan_vfio_fd, 0, 0);

  if (dbm->vfio_container_fd != -1)
    {
      struct vfio_iommu_type1_dma_map dm = { 0 };
      int i, rv = 0;
      dm.argsz = sizeof (struct vfio_iommu_type1_dma_map);
      dm.flags = VFIO_DMA_MAP_FLAG_READ | VFIO_DMA_MAP_FLAG_WRITE;

      /* *INDENT-OFF* */
      vec_foreach_index (i, pr->page_table)
	{
	  dm.vaddr = pointer_to_uword (pr->mem) + (i << pr->log2_page_size);
	  dm.size = 1 << pr->log2_page_size;
	  dm.iova = pr->page_table[i];
	  if ((rv = ioctl (dbm->vfio_container_fd, VFIO_IOMMU_MAP_DMA, &dm)))
	    break;
	}
      /* *INDENT-ON* */
      if (rv != 0 && errno != EINVAL)
	clib_unix_warning ("ioctl(VFIO_IOMMU_MAP_DMA) pool '%s'", pool_name);
    }

  return 0;
}

clib_error_t *
dpdk_buffer_pool_create (vlib_main_t * vm, unsigned num_mbufs,
			 unsigned socket_id)
{
  dpdk_main_t *dm = &dpdk_main;
  struct rte_mempool *rmp;
  vlib_physmem_region_index_t pri;
  clib_error_t *error = 0;
  u8 *pool_name;
  u32 elt_size, i;

  vec_validate_aligned (dm->pktmbuf_pools, socket_id, CLIB_CACHE_LINE_BYTES);

  /* pool already exists, nothing to do */
  if (dm->pktmbuf_pools[socket_id])
    return 0;

  pool_name = format (0, "dpdk_mbuf_pool_socket%u%c", socket_id, 0);

  elt_size = sizeof (struct rte_mbuf) +
    VLIB_BUFFER_HDR_SIZE /* priv size */  +
    VLIB_BUFFER_PRE_DATA_SIZE + VLIB_BUFFER_DATA_SIZE;	/*data room size */

  error =
    dpdk_pool_create (vm, pool_name, elt_size, num_mbufs,
		      sizeof (dpdk_mempool_private_t), 512, socket_id,
		      &rmp, &pri);

  vec_free (pool_name);

  if (!error)
    {
      /* call the object initializers */
      rte_mempool_obj_iter (rmp, rte_pktmbuf_init, 0);

      dpdk_mempool_private_t *privp = rte_mempool_get_priv (rmp);
      privp->buffer_pool_index = vlib_buffer_pool_create (vm, pri, 0);

      dm->pktmbuf_pools[socket_id] = rmp;

      return 0;
    }

  clib_error_report (error);

  /* no usable pool for this socket, try to use pool from another one */
  for (i = 0; i < vec_len (dm->pktmbuf_pools); i++)
    {
      if (dm->pktmbuf_pools[i])
	{
	  clib_warning ("WARNING: Failed to allocate mempool for CPU socket "
			"%u. Threads running on socket %u will use socket %u "
			"mempool.", socket_id, socket_id, i);
	  dm->pktmbuf_pools[socket_id] = dm->pktmbuf_pools[i];
	  return 0;
	}
    }

  return clib_error_return (0, "failed to allocate mempool on socket %u",
			    socket_id);
}

#if CLIB_DEBUG > 0

u32 *vlib_buffer_state_validation_lock;
uword *vlib_buffer_state_validation_hash;
void *vlib_buffer_state_heap;

static clib_error_t *
buffer_state_validation_init (vlib_main_t * vm)
{
  void *oldheap;

  vlib_buffer_state_heap = mheap_alloc (0, 10 << 20);

  oldheap = clib_mem_set_heap (vlib_buffer_state_heap);

  vlib_buffer_state_validation_hash = hash_create (0, sizeof (uword));
  vec_validate_aligned (vlib_buffer_state_validation_lock, 0,
			CLIB_CACHE_LINE_BYTES);
  clib_mem_set_heap (oldheap);
  return 0;
}

VLIB_INIT_FUNCTION (buffer_state_validation_init);
#endif

#if CLI_DEBUG
struct dpdk_validate_buf_result
{
  u32 invalid;
  u32 uninitialized;
};

#define DPDK_TRAJECTORY_POISON 31

static void
dpdk_buffer_validate_trajectory (struct rte_mempool *mp, void *opaque,
				 void *obj, unsigned obj_idx)
{
  vlib_buffer_t *b;
  struct dpdk_validate_buf_result *counter = opaque;
  b = vlib_buffer_from_rte_mbuf ((struct rte_mbuf *) obj);
  if (b->pre_data[0] != 0)
    {
      if (b->pre_data[0] == DPDK_TRAJECTORY_POISON)
	counter->uninitialized++;
      else
	counter->invalid++;
    }
}

int
dpdk_buffer_validate_trajectory_all (u32 * uninitialized)
{
  dpdk_main_t *dm = &dpdk_main;
  struct dpdk_validate_buf_result counter = { 0 };
  int i;

  for (i = 0; i < vec_len (dm->pktmbuf_pools); i++)
    rte_mempool_obj_iter (dm->pktmbuf_pools[i],
			  dpdk_buffer_validate_trajectory, &counter);
  if (uninitialized)
    *uninitialized = counter.uninitialized;
  return counter.invalid;
}

static void
dpdk_buffer_poison_trajectory (struct rte_mempool *mp, void *opaque,
			       void *obj, unsigned obj_idx)
{
  vlib_buffer_t *b;
  b = vlib_buffer_from_rte_mbuf ((struct rte_mbuf *) obj);
  b->pre_data[0] = DPDK_TRAJECTORY_POISON;
}

void
dpdk_buffer_poison_trajectory_all (void)
{
  dpdk_main_t *dm = &dpdk_main;
  int i;

  for (i = 0; i < vec_len (dm->pktmbuf_pools); i++)
    rte_mempool_obj_iter (dm->pktmbuf_pools[i], dpdk_buffer_poison_trajectory,
			  0);
}
#endif

static clib_error_t *
dpdk_buffer_init (vlib_main_t * vm)
{
  dpdk_buffer_main_t *dbm = &dpdk_buffer_main;
  vlib_thread_main_t *tm = vlib_get_thread_main ();

  vec_validate_aligned (dbm->ptd, tm->n_vlib_mains - 1,
			CLIB_CACHE_LINE_BYTES);

  dbm->vfio_container_fd = -1;

  return 0;
}

VLIB_INIT_FUNCTION (dpdk_buffer_init);

/* *INDENT-OFF* */
VLIB_BUFFER_REGISTER_CALLBACKS (dpdk, static) = {
  .vlib_buffer_fill_free_list_cb = &dpdk_buffer_fill_free_list,
  .vlib_buffer_free_cb = &dpdk_buffer_free,
  .vlib_buffer_free_no_next_cb = &dpdk_buffer_free_no_next,
  .vlib_packet_template_init_cb = &dpdk_packet_template_init,
  .vlib_buffer_delete_free_list_cb = &dpdk_buffer_delete_free_list,
};
/* *INDENT-ON* */

#if __x86_64__
vlib_buffer_fill_free_list_cb_t __clib_weak dpdk_buffer_fill_free_list_avx512;
vlib_buffer_fill_free_list_cb_t __clib_weak dpdk_buffer_fill_free_list_avx2;
vlib_buffer_free_cb_t __clib_weak dpdk_buffer_free_avx512;
vlib_buffer_free_cb_t __clib_weak dpdk_buffer_free_avx2;
vlib_buffer_free_no_next_cb_t __clib_weak dpdk_buffer_free_no_next_avx512;
vlib_buffer_free_no_next_cb_t __clib_weak dpdk_buffer_free_no_next_avx2;

static void __clib_constructor
dpdk_input_multiarch_select (void)
{
  vlib_buffer_callbacks_t *cb = &__dpdk_buffer_callbacks;
  if (dpdk_buffer_fill_free_list_avx512 && clib_cpu_supports_avx512f ())
    {
      cb->vlib_buffer_fill_free_list_cb = dpdk_buffer_fill_free_list_avx512;
      cb->vlib_buffer_free_cb = dpdk_buffer_free_avx512;
      cb->vlib_buffer_free_no_next_cb = dpdk_buffer_free_no_next_avx512;
    }
  else if (dpdk_buffer_fill_free_list_avx2 && clib_cpu_supports_avx2 ())
    {
      cb->vlib_buffer_fill_free_list_cb = dpdk_buffer_fill_free_list_avx2;
      cb->vlib_buffer_free_cb = dpdk_buffer_free_avx2;
      cb->vlib_buffer_free_no_next_cb = dpdk_buffer_free_no_next_avx2;
    }
}
#endif
#endif

/** @endcond */
/*
 * fd.io coding-style-patch-verification: ON
 *
 * Local Variables:
 * eval: (c-set-style "gnu")
 * End:
 */