summaryrefslogtreecommitdiff
path: root/drivers/net/ethernet/mellanox/mlxsw/spectrum_acl_atcam.c
blob: 80fb268d51a5e24dc67469d47ac6925abc72b853 (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
// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0
/* Copyright (c) 2018 Mellanox Technologies. All rights reserved */

#include <linux/kernel.h>
#include <linux/err.h>
#include <linux/errno.h>
#include <linux/gfp.h>
#include <linux/refcount.h>
#include <linux/rhashtable.h>

#include "reg.h"
#include "core.h"
#include "spectrum.h"
#include "spectrum_acl_tcam.h"
#include "core_acl_flex_keys.h"

#define MLXSW_SP_ACL_ATCAM_LKEY_ID_BLOCK_CLEAR_START	0
#define MLXSW_SP_ACL_ATCAM_LKEY_ID_BLOCK_CLEAR_END	5

struct mlxsw_sp_acl_atcam_lkey_id_ht_key {
	char enc_key[MLXSW_REG_PTCEX_FLEX_KEY_BLOCKS_LEN]; /* MSB blocks */
	u8 erp_id;
};

struct mlxsw_sp_acl_atcam_lkey_id {
	struct rhash_head ht_node;
	struct mlxsw_sp_acl_atcam_lkey_id_ht_key ht_key;
	refcount_t refcnt;
	u32 id;
};

struct mlxsw_sp_acl_atcam_region_ops {
	int (*init)(struct mlxsw_sp_acl_atcam_region *aregion);
	void (*fini)(struct mlxsw_sp_acl_atcam_region *aregion);
	struct mlxsw_sp_acl_atcam_lkey_id *
		(*lkey_id_get)(struct mlxsw_sp_acl_atcam_region *aregion,
			       char *enc_key, u8 erp_id);
	void (*lkey_id_put)(struct mlxsw_sp_acl_atcam_region *aregion,
			    struct mlxsw_sp_acl_atcam_lkey_id *lkey_id);
};

struct mlxsw_sp_acl_atcam_region_generic {
	struct mlxsw_sp_acl_atcam_lkey_id dummy_lkey_id;
};

struct mlxsw_sp_acl_atcam_region_12kb {
	struct rhashtable lkey_ht;
	unsigned int max_lkey_id;
	unsigned long *used_lkey_id;
};

static const struct rhashtable_params mlxsw_sp_acl_atcam_lkey_id_ht_params = {
	.key_len = sizeof(struct mlxsw_sp_acl_atcam_lkey_id_ht_key),
	.key_offset = offsetof(struct mlxsw_sp_acl_atcam_lkey_id, ht_key),
	.head_offset = offsetof(struct mlxsw_sp_acl_atcam_lkey_id, ht_node),
};

static const struct rhashtable_params mlxsw_sp_acl_atcam_entries_ht_params = {
	.key_len = sizeof(struct mlxsw_sp_acl_atcam_entry_ht_key),
	.key_offset = offsetof(struct mlxsw_sp_acl_atcam_entry, ht_key),
	.head_offset = offsetof(struct mlxsw_sp_acl_atcam_entry, ht_node),
};

static bool
mlxsw_sp_acl_atcam_is_centry(const struct mlxsw_sp_acl_atcam_entry *aentry)
{
	return mlxsw_sp_acl_erp_mask_is_ctcam(aentry->erp_mask);
}

static int
mlxsw_sp_acl_atcam_region_generic_init(struct mlxsw_sp_acl_atcam_region *aregion)
{
	struct mlxsw_sp_acl_atcam_region_generic *region_generic;

	region_generic = kzalloc(sizeof(*region_generic), GFP_KERNEL);
	if (!region_generic)
		return -ENOMEM;

	refcount_set(&region_generic->dummy_lkey_id.refcnt, 1);
	aregion->priv = region_generic;

	return 0;
}

static void
mlxsw_sp_acl_atcam_region_generic_fini(struct mlxsw_sp_acl_atcam_region *aregion)
{
	kfree(aregion->priv);
}

static struct mlxsw_sp_acl_atcam_lkey_id *
mlxsw_sp_acl_atcam_generic_lkey_id_get(struct mlxsw_sp_acl_atcam_region *aregion,
				       char *enc_key, u8 erp_id)
{
	struct mlxsw_sp_acl_atcam_region_generic *region_generic;

	region_generic = aregion->priv;
	return &region_generic->dummy_lkey_id;
}

static void
mlxsw_sp_acl_atcam_generic_lkey_id_put(struct mlxsw_sp_acl_atcam_region *aregion,
				       struct mlxsw_sp_acl_atcam_lkey_id *lkey_id)
{
}

static const struct mlxsw_sp_acl_atcam_region_ops
mlxsw_sp_acl_atcam_region_generic_ops = {
	.init		= mlxsw_sp_acl_atcam_region_generic_init,
	.fini		= mlxsw_sp_acl_atcam_region_generic_fini,
	.lkey_id_get	= mlxsw_sp_acl_atcam_generic_lkey_id_get,
	.lkey_id_put	= mlxsw_sp_acl_atcam_generic_lkey_id_put,
};

static int
mlxsw_sp_acl_atcam_region_12kb_init(struct mlxsw_sp_acl_atcam_region *aregion)
{
	struct mlxsw_sp *mlxsw_sp = aregion->region->mlxsw_sp;
	struct mlxsw_sp_acl_atcam_region_12kb *region_12kb;
	size_t alloc_size;
	u64 max_lkey_id;
	int err;

	if (!MLXSW_CORE_RES_VALID(mlxsw_sp->core, ACL_MAX_LARGE_KEY_ID))
		return -EIO;

	max_lkey_id = MLXSW_CORE_RES_GET(mlxsw_sp->core, ACL_MAX_LARGE_KEY_ID);
	region_12kb = kzalloc(sizeof(*region_12kb), GFP_KERNEL);
	if (!region_12kb)
		return -ENOMEM;

	alloc_size = BITS_TO_LONGS(max_lkey_id) * sizeof(unsigned long);
	region_12kb->used_lkey_id = kzalloc(alloc_size, GFP_KERNEL);
	if (!region_12kb->used_lkey_id) {
		err = -ENOMEM;
		goto err_used_lkey_id_alloc;
	}

	err = rhashtable_init(&region_12kb->lkey_ht,
			      &mlxsw_sp_acl_atcam_lkey_id_ht_params);
	if (err)
		goto err_rhashtable_init;

	region_12kb->max_lkey_id = max_lkey_id;
	aregion->priv = region_12kb;

	return 0;

err_rhashtable_init:
	kfree(region_12kb->used_lkey_id);
err_used_lkey_id_alloc:
	kfree(region_12kb);
	return err;
}

static void
mlxsw_sp_acl_atcam_region_12kb_fini(struct mlxsw_sp_acl_atcam_region *aregion)
{
	struct mlxsw_sp_acl_atcam_region_12kb *region_12kb = aregion->priv;

	rhashtable_destroy(&region_12kb->lkey_ht);
	kfree(region_12kb->used_lkey_id);
	kfree(region_12kb);
}

static struct mlxsw_sp_acl_atcam_lkey_id *
mlxsw_sp_acl_atcam_lkey_id_create(struct mlxsw_sp_acl_atcam_region *aregion,
				  struct mlxsw_sp_acl_atcam_lkey_id_ht_key *ht_key)
{
	struct mlxsw_sp_acl_atcam_region_12kb *region_12kb = aregion->priv;
	struct mlxsw_sp_acl_atcam_lkey_id *lkey_id;
	u32 id;
	int err;

	id = find_first_zero_bit(region_12kb->used_lkey_id,
				 region_12kb->max_lkey_id);
	if (id < region_12kb->max_lkey_id)
		__set_bit(id, region_12kb->used_lkey_id);
	else
		return ERR_PTR(-ENOBUFS);

	lkey_id = kzalloc(sizeof(*lkey_id), GFP_KERNEL);
	if (!lkey_id) {
		err = -ENOMEM;
		goto err_lkey_id_alloc;
	}

	lkey_id->id = id;
	memcpy(&lkey_id->ht_key, ht_key, sizeof(*ht_key));
	refcount_set(&lkey_id->refcnt, 1);

	err = rhashtable_insert_fast(&region_12kb->lkey_ht,
				     &lkey_id->ht_node,
				     mlxsw_sp_acl_atcam_lkey_id_ht_params);
	if (err)
		goto err_rhashtable_insert;

	return lkey_id;

err_rhashtable_insert:
	kfree(lkey_id);
err_lkey_id_alloc:
	__clear_bit(id, region_12kb->used_lkey_id);
	return ERR_PTR(err);
}

static void
mlxsw_sp_acl_atcam_lkey_id_destroy(struct mlxsw_sp_acl_atcam_region *aregion,
				   struct mlxsw_sp_acl_atcam_lkey_id *lkey_id)
{
	struct mlxsw_sp_acl_atcam_region_12kb *region_12kb = aregion->priv;
	u32 id = lkey_id->id;

	rhashtable_remove_fast(&region_12kb->lkey_ht, &lkey_id->ht_node,
			       mlxsw_sp_acl_atcam_lkey_id_ht_params);
	kfree(lkey_id);
	__clear_bit(id, region_12kb->used_lkey_id);
}

static struct mlxsw_sp_acl_atcam_lkey_id *
mlxsw_sp_acl_atcam_12kb_lkey_id_get(struct mlxsw_sp_acl_atcam_region *aregion,
				    char *enc_key, u8 erp_id)
{
	struct mlxsw_sp_acl_atcam_region_12kb *region_12kb = aregion->priv;
	struct mlxsw_sp_acl_tcam_region *region = aregion->region;
	struct mlxsw_sp_acl_atcam_lkey_id_ht_key ht_key = {{ 0 } };
	struct mlxsw_sp *mlxsw_sp = region->mlxsw_sp;
	struct mlxsw_afk *afk = mlxsw_sp_acl_afk(mlxsw_sp->acl);
	struct mlxsw_sp_acl_atcam_lkey_id *lkey_id;

	memcpy(ht_key.enc_key, enc_key, sizeof(ht_key.enc_key));
	mlxsw_afk_clear(afk, ht_key.enc_key,
			MLXSW_SP_ACL_ATCAM_LKEY_ID_BLOCK_CLEAR_START,
			MLXSW_SP_ACL_ATCAM_LKEY_ID_BLOCK_CLEAR_END);
	ht_key.erp_id = erp_id;
	lkey_id = rhashtable_lookup_fast(&region_12kb->lkey_ht, &ht_key,
					 mlxsw_sp_acl_atcam_lkey_id_ht_params);
	if (lkey_id) {
		refcount_inc(&lkey_id->refcnt);
		return lkey_id;
	}

	return mlxsw_sp_acl_atcam_lkey_id_create(aregion, &ht_key);
}

static void
mlxsw_sp_acl_atcam_12kb_lkey_id_put(struct mlxsw_sp_acl_atcam_region *aregion,
				    struct mlxsw_sp_acl_atcam_lkey_id *lkey_id)
{
	if (refcount_dec_and_test(&lkey_id->refcnt))
		mlxsw_sp_acl_atcam_lkey_id_destroy(aregion, lkey_id);
}

static const struct mlxsw_sp_acl_atcam_region_ops
mlxsw_sp_acl_atcam_region_12kb_ops = {
	.init		= mlxsw_sp_acl_atcam_region_12kb_init,
	.fini		= mlxsw_sp_acl_atcam_region_12kb_fini,
	.lkey_id_get	= mlxsw_sp_acl_atcam_12kb_lkey_id_get,
	.lkey_id_put	= mlxsw_sp_acl_atcam_12kb_lkey_id_put,
};

static const struct mlxsw_sp_acl_atcam_region_ops *
mlxsw_sp_acl_atcam_region_ops_arr[] = {
	[MLXSW_SP_ACL_ATCAM_REGION_TYPE_2KB]	=
		&mlxsw_sp_acl_atcam_region_generic_ops,
	[MLXSW_SP_ACL_ATCAM_REGION_TYPE_4KB]	=
		&mlxsw_sp_acl_atcam_region_generic_ops,
	[MLXSW_SP_ACL_ATCAM_REGION_TYPE_8KB]	=
		&mlxsw_sp_acl_atcam_region_generic_ops,
	[MLXSW_SP_ACL_ATCAM_REGION_TYPE_12KB]	=
		&mlxsw_sp_acl_atcam_region_12kb_ops,
};

int mlxsw_sp_acl_atcam_region_associate(struct mlxsw_sp *mlxsw_sp,
					u16 region_id)
{
	char perar_pl[MLXSW_REG_PERAR_LEN];
	/* For now, just assume that every region has 12 key blocks */
	u16 hw_region = region_id * 3;
	u64 max_regions;

	max_regions = MLXSW_CORE_RES_GET(mlxsw_sp->core, ACL_MAX_REGIONS);
	if (hw_region >= max_regions)
		return -ENOBUFS;

	mlxsw_reg_perar_pack(perar_pl, region_id, hw_region);
	return mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(perar), perar_pl);
}

static void
mlxsw_sp_acl_atcam_region_type_init(struct mlxsw_sp_acl_atcam_region *aregion)
{
	struct mlxsw_sp_acl_tcam_region *region = aregion->region;
	enum mlxsw_sp_acl_atcam_region_type region_type;
	unsigned int blocks_count;

	/* We already know the blocks count can not exceed the maximum
	 * blocks count.
	 */
	blocks_count = mlxsw_afk_key_info_blocks_count_get(region->key_info);
	if (blocks_count <= 2)
		region_type = MLXSW_SP_ACL_ATCAM_REGION_TYPE_2KB;
	else if (blocks_count <= 4)
		region_type = MLXSW_SP_ACL_ATCAM_REGION_TYPE_4KB;
	else if (blocks_count <= 8)
		region_type = MLXSW_SP_ACL_ATCAM_REGION_TYPE_8KB;
	else
		region_type = MLXSW_SP_ACL_ATCAM_REGION_TYPE_12KB;

	aregion->type = region_type;
	aregion->ops = mlxsw_sp_acl_atcam_region_ops_arr[region_type];
}

int
mlxsw_sp_acl_atcam_region_init(struct mlxsw_sp *mlxsw_sp,
			       struct mlxsw_sp_acl_atcam *atcam,
			       struct mlxsw_sp_acl_atcam_region *aregion,
			       struct mlxsw_sp_acl_tcam_region *region,
			       const struct mlxsw_sp_acl_ctcam_region_ops *ops)
{
	int err;

	aregion->region = region;
	aregion->atcam = atcam;
	mlxsw_sp_acl_atcam_region_type_init(aregion);
	INIT_LIST_HEAD(&aregion->entries_list);

	err = rhashtable_init(&aregion->entries_ht,
			      &mlxsw_sp_acl_atcam_entries_ht_params);
	if (err)
		return err;
	err = aregion->ops->init(aregion);
	if (err)
		goto err_ops_init;
	err = mlxsw_sp_acl_erp_region_init(aregion);
	if (err)
		goto err_erp_region_init;
	err = mlxsw_sp_acl_ctcam_region_init(mlxsw_sp, &aregion->cregion,
					     region, ops);
	if (err)
		goto err_ctcam_region_init;

	return 0;

err_ctcam_region_init:
	mlxsw_sp_acl_erp_region_fini(aregion);
err_erp_region_init:
	aregion->ops->fini(aregion);
err_ops_init:
	rhashtable_destroy(&aregion->entries_ht);
	return err;
}

void mlxsw_sp_acl_atcam_region_fini(struct mlxsw_sp_acl_atcam_region *aregion)
{
	mlxsw_sp_acl_ctcam_region_fini(&aregion->cregion);
	mlxsw_sp_acl_erp_region_fini(aregion);
	aregion->ops->fini(aregion);
	rhashtable_destroy(&aregion->entries_ht);
	WARN_ON(!list_empty(&aregion->entries_list));
}

void mlxsw_sp_acl_atcam_chunk_init(struct mlxsw_sp_acl_atcam_region *aregion,
				   struct mlxsw_sp_acl_atcam_chunk *achunk,
				   unsigned int priority)
{
	mlxsw_sp_acl_ctcam_chunk_init(&aregion->cregion, &achunk->cchunk,
				      priority);
}

void mlxsw_sp_acl_atcam_chunk_fini(struct mlxsw_sp_acl_atcam_chunk *achunk)
{
	mlxsw_sp_acl_ctcam_chunk_fini(&achunk->cchunk);
}

static int
mlxsw_sp_acl_atcam_region_entry_insert(struct mlxsw_sp *mlxsw_sp,
				       struct mlxsw_sp_acl_atcam_region *aregion,
				       struct mlxsw_sp_acl_atcam_entry *aentry,
				       struct mlxsw_sp_acl_rule_info *rulei)
{
	struct mlxsw_sp_acl_tcam_region *region = aregion->region;
	u8 erp_id = mlxsw_sp_acl_erp_mask_erp_id(aentry->erp_mask);
	struct mlxsw_sp_acl_atcam_lkey_id *lkey_id;
	char ptce3_pl[MLXSW_REG_PTCE3_LEN];
	u32 kvdl_index, priority;
	int err;

	err = mlxsw_sp_acl_tcam_priority_get(mlxsw_sp, rulei, &priority, true);
	if (err)
		return err;

	lkey_id = aregion->ops->lkey_id_get(aregion, aentry->ht_key.enc_key,
					    erp_id);
	if (IS_ERR(lkey_id))
		return PTR_ERR(lkey_id);
	aentry->lkey_id = lkey_id;

	kvdl_index = mlxsw_afa_block_first_kvdl_index(rulei->act_block);
	mlxsw_reg_ptce3_pack(ptce3_pl, true, MLXSW_REG_PTCE3_OP_WRITE_WRITE,
			     priority, region->tcam_region_info,
			     aentry->ht_key.enc_key, erp_id,
			     aentry->delta_info.start,
			     aentry->delta_info.mask,
			     aentry->delta_info.value,
			     refcount_read(&lkey_id->refcnt) != 1, lkey_id->id,
			     kvdl_index);
	err = mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(ptce3), ptce3_pl);
	if (err)
		goto err_ptce3_write;

	return 0;

err_ptce3_write:
	aregion->ops->lkey_id_put(aregion, lkey_id);
	return err;
}

static void
mlxsw_sp_acl_atcam_region_entry_remove(struct mlxsw_sp *mlxsw_sp,
				       struct mlxsw_sp_acl_atcam_region *aregion,
				       struct mlxsw_sp_acl_atcam_entry *aentry)
{
	struct mlxsw_sp_acl_atcam_lkey_id *lkey_id = aentry->lkey_id;
	struct mlxsw_sp_acl_tcam_region *region = aregion->region;
	u8 erp_id = mlxsw_sp_acl_erp_mask_erp_id(aentry->erp_mask);
	char *enc_key = aentry->ht_key.enc_key;
	char ptce3_pl[MLXSW_REG_PTCE3_LEN];

	mlxsw_reg_ptce3_pack(ptce3_pl, false, MLXSW_REG_PTCE3_OP_WRITE_WRITE, 0,
			     region->tcam_region_info,
			     enc_key, erp_id,
			     aentry->delta_info.start,
			     aentry->delta_info.mask,
			     aentry->delta_info.value,
			     refcount_read(&lkey_id->refcnt) != 1,
			     lkey_id->id, 0);
	mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(ptce3), ptce3_pl);
	aregion->ops->lkey_id_put(aregion, lkey_id);
}

static int
mlxsw_sp_acl_atcam_region_entry_action_replace(struct mlxsw_sp *mlxsw_sp,
					       struct mlxsw_sp_acl_atcam_region *aregion,
					       struct mlxsw_sp_acl_atcam_entry *aentry,
					       struct mlxsw_sp_acl_rule_info *rulei)
{
	struct mlxsw_sp_acl_atcam_lkey_id *lkey_id = aentry->lkey_id;
	u8 erp_id = mlxsw_sp_acl_erp_mask_erp_id(aentry->erp_mask);
	struct mlxsw_sp_acl_tcam_region *region = aregion->region;
	char ptce3_pl[MLXSW_REG_PTCE3_LEN];
	u32 kvdl_index, priority;
	int err;

	err = mlxsw_sp_acl_tcam_priority_get(mlxsw_sp, rulei, &priority, true);
	if (err)
		return err;
	kvdl_index = mlxsw_afa_block_first_kvdl_index(rulei->act_block);
	mlxsw_reg_ptce3_pack(ptce3_pl, true, MLXSW_REG_PTCE3_OP_WRITE_UPDATE,
			     priority, region->tcam_region_info,
			     aentry->ht_key.enc_key, erp_id,
			     aentry->delta_info.start,
			     aentry->delta_info.mask,
			     aentry->delta_info.value,
			     refcount_read(&lkey_id->refcnt) != 1, lkey_id->id,
			     kvdl_index);
	return mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(ptce3), ptce3_pl);
}

static int
__mlxsw_sp_acl_atcam_entry_add(struct mlxsw_sp *mlxsw_sp,
			       struct mlxsw_sp_acl_atcam_region *aregion,
			       struct mlxsw_sp_acl_atcam_entry *aentry,
			       struct mlxsw_sp_acl_rule_info *rulei)
{
	struct mlxsw_sp_acl_tcam_region *region = aregion->region;
	char mask[MLXSW_REG_PTCEX_FLEX_KEY_BLOCKS_LEN] = { 0 };
	struct mlxsw_afk *afk = mlxsw_sp_acl_afk(mlxsw_sp->acl);
	const struct mlxsw_sp_acl_erp_delta *delta;
	struct mlxsw_sp_acl_erp_mask *erp_mask;
	int err;

	mlxsw_afk_encode(afk, region->key_info, &rulei->values,
			 aentry->full_enc_key, mask);

	erp_mask = mlxsw_sp_acl_erp_mask_get(aregion, mask, false);
	if (IS_ERR(erp_mask))
		return PTR_ERR(erp_mask);
	aentry->erp_mask = erp_mask;
	aentry->ht_key.erp_id = mlxsw_sp_acl_erp_mask_erp_id(erp_mask);
	memcpy(aentry->ht_key.enc_key, aentry->full_enc_key,
	       sizeof(aentry->ht_key.enc_key));

	/* Compute all needed delta information and clear the delta bits
	 * from the encrypted key.
	 */
	delta = mlxsw_sp_acl_erp_delta(aentry->erp_mask);
	aentry->delta_info.start = mlxsw_sp_acl_erp_delta_start(delta);
	aentry->delta_info.mask = mlxsw_sp_acl_erp_delta_mask(delta);
	aentry->delta_info.value =
		mlxsw_sp_acl_erp_delta_value(delta, aentry->full_enc_key);
	mlxsw_sp_acl_erp_delta_clear(delta, aentry->ht_key.enc_key);

	/* Add rule to the list of A-TCAM rules, assuming this
	 * rule is intended to A-TCAM. In case this rule does
	 * not fit into A-TCAM it will be removed from the list.
	 */
	list_add(&aentry->list, &aregion->entries_list);

	/* We can't insert identical rules into the A-TCAM, so fail and
	 * let the rule spill into C-TCAM
	 */
	err = rhashtable_lookup_insert_fast(&aregion->entries_ht,
					    &aentry->ht_node,
					    mlxsw_sp_acl_atcam_entries_ht_params);
	if (err)
		goto err_rhashtable_insert;

	/* Bloom filter must be updated here, before inserting the rule into
	 * the A-TCAM.
	 */
	err = mlxsw_sp_acl_erp_bf_insert(mlxsw_sp, aregion, erp_mask, aentry);
	if (err)
		goto err_bf_insert;

	err = mlxsw_sp_acl_atcam_region_entry_insert(mlxsw_sp, aregion, aentry,
						     rulei);
	if (err)
		goto err_rule_insert;

	return 0;

err_rule_insert:
	mlxsw_sp_acl_erp_bf_remove(mlxsw_sp, aregion, erp_mask, aentry);
err_bf_insert:
	rhashtable_remove_fast(&aregion->entries_ht, &aentry->ht_node,
			       mlxsw_sp_acl_atcam_entries_ht_params);
err_rhashtable_insert:
	list_del(&aentry->list);
	mlxsw_sp_acl_erp_mask_put(aregion, erp_mask);
	return err;
}

static void
__mlxsw_sp_acl_atcam_entry_del(struct mlxsw_sp *mlxsw_sp,
			       struct mlxsw_sp_acl_atcam_region *aregion,
			       struct mlxsw_sp_acl_atcam_entry *aentry)
{
	mlxsw_sp_acl_atcam_region_entry_remove(mlxsw_sp, aregion, aentry);
	mlxsw_sp_acl_erp_bf_remove(mlxsw_sp, aregion, aentry->erp_mask, aentry);
	rhashtable_remove_fast(&aregion->entries_ht, &aentry->ht_node,
			       mlxsw_sp_acl_atcam_entries_ht_params);
	list_del(&aentry->list);
	mlxsw_sp_acl_erp_mask_put(aregion, aentry->erp_mask);
}

static int
__mlxsw_sp_acl_atcam_entry_action_replace(struct mlxsw_sp *mlxsw_sp,
					  struct mlxsw_sp_acl_atcam_region *aregion,
					  struct mlxsw_sp_acl_atcam_entry *aentry,
					  struct mlxsw_sp_acl_rule_info *rulei)
{
	return mlxsw_sp_acl_atcam_region_entry_action_replace(mlxsw_sp, aregion,
							      aentry, rulei);
}

int mlxsw_sp_acl_atcam_entry_add(struct mlxsw_sp *mlxsw_sp,
				 struct mlxsw_sp_acl_atcam_region *aregion,
				 struct mlxsw_sp_acl_atcam_chunk *achunk,
				 struct mlxsw_sp_acl_atcam_entry *aentry,
				 struct mlxsw_sp_acl_rule_info *rulei)
{
	int err;

	err = __mlxsw_sp_acl_atcam_entry_add(mlxsw_sp, aregion, aentry, rulei);
	if (!err)
		return 0;

	/* It is possible we failed to add the rule to the A-TCAM due to
	 * exceeded number of masks. Try to spill into C-TCAM.
	 */
	err = mlxsw_sp_acl_ctcam_entry_add(mlxsw_sp, &aregion->cregion,
					   &achunk->cchunk, &aentry->centry,
					   rulei, true);
	if (!err)
		return 0;

	return err;
}

void mlxsw_sp_acl_atcam_entry_del(struct mlxsw_sp *mlxsw_sp,
				  struct mlxsw_sp_acl_atcam_region *aregion,
				  struct mlxsw_sp_acl_atcam_chunk *achunk,
				  struct mlxsw_sp_acl_atcam_entry *aentry)
{
	if (mlxsw_sp_acl_atcam_is_centry(aentry))
		mlxsw_sp_acl_ctcam_entry_del(mlxsw_sp, &aregion->cregion,
					     &achunk->cchunk, &aentry->centry);
	else
		__mlxsw_sp_acl_atcam_entry_del(mlxsw_sp, aregion, aentry);
}

int
mlxsw_sp_acl_atcam_entry_action_replace(struct mlxsw_sp *mlxsw_sp,
					struct mlxsw_sp_acl_atcam_region *aregion,
					struct mlxsw_sp_acl_atcam_chunk *achunk,
					struct mlxsw_sp_acl_atcam_entry *aentry,
					struct mlxsw_sp_acl_rule_info *rulei)
{
	int err;

	if (mlxsw_sp_acl_atcam_is_centry(aentry))
		err = mlxsw_sp_acl_ctcam_entry_action_replace(mlxsw_sp,
							      &aregion->cregion,
							      &achunk->cchunk,
							      &aentry->centry,
							      rulei);
	else
		err = __mlxsw_sp_acl_atcam_entry_action_replace(mlxsw_sp,
								aregion, aentry,
								rulei);

	return err;
}

int mlxsw_sp_acl_atcam_init(struct mlxsw_sp *mlxsw_sp,
			    struct mlxsw_sp_acl_atcam *atcam)
{
	return mlxsw_sp_acl_erps_init(mlxsw_sp, atcam);
}

void mlxsw_sp_acl_atcam_fini(struct mlxsw_sp *mlxsw_sp,
			     struct mlxsw_sp_acl_atcam *atcam)
{
	mlxsw_sp_acl_erps_fini(mlxsw_sp, atcam);
}