summaryrefslogtreecommitdiff
path: root/drivers/net/ethernet/netronome/nfp/crypto/ipsec.c
blob: c0dcce8ae4375dca52fb1b5ca211a7b8b2ed7ada (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
// SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
/* Copyright (C) 2018 Netronome Systems, Inc */
/* Copyright (C) 2021 Corigine, Inc */

#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/netdevice.h>
#include <asm/unaligned.h>
#include <linux/ktime.h>
#include <net/xfrm.h>

#include "../nfpcore/nfp_dev.h"
#include "../nfp_net_ctrl.h"
#include "../nfp_net.h"
#include "crypto.h"

#define NFP_NET_IPSEC_MAX_SA_CNT  (16 * 1024) /* Firmware support a maximum of 16K SA offload */

/* IPsec config message cmd codes */
enum nfp_ipsec_cfg_mssg_cmd_codes {
	NFP_IPSEC_CFG_MSSG_ADD_SA,	 /* Add a new SA */
	NFP_IPSEC_CFG_MSSG_INV_SA	 /* Invalidate an existing SA */
};

/* IPsec config message response codes */
enum nfp_ipsec_cfg_mssg_rsp_codes {
	NFP_IPSEC_CFG_MSSG_OK,
	NFP_IPSEC_CFG_MSSG_FAILED,
	NFP_IPSEC_CFG_MSSG_SA_VALID,
	NFP_IPSEC_CFG_MSSG_SA_HASH_ADD_FAILED,
	NFP_IPSEC_CFG_MSSG_SA_HASH_DEL_FAILED,
	NFP_IPSEC_CFG_MSSG_SA_INVALID_CMD
};

/* Protocol */
enum nfp_ipsec_sa_prot {
	NFP_IPSEC_PROTOCOL_AH = 0,
	NFP_IPSEC_PROTOCOL_ESP = 1
};

/* Mode */
enum nfp_ipsec_sa_mode {
	NFP_IPSEC_PROTMODE_TRANSPORT = 0,
	NFP_IPSEC_PROTMODE_TUNNEL = 1
};

/* Cipher types */
enum nfp_ipsec_sa_cipher {
	NFP_IPSEC_CIPHER_NULL,
	NFP_IPSEC_CIPHER_3DES,
	NFP_IPSEC_CIPHER_AES128,
	NFP_IPSEC_CIPHER_AES192,
	NFP_IPSEC_CIPHER_AES256,
	NFP_IPSEC_CIPHER_AES128_NULL,
	NFP_IPSEC_CIPHER_AES192_NULL,
	NFP_IPSEC_CIPHER_AES256_NULL,
	NFP_IPSEC_CIPHER_CHACHA20
};

/* Cipher modes */
enum nfp_ipsec_sa_cipher_mode {
	NFP_IPSEC_CIMODE_ECB,
	NFP_IPSEC_CIMODE_CBC,
	NFP_IPSEC_CIMODE_CFB,
	NFP_IPSEC_CIMODE_OFB,
	NFP_IPSEC_CIMODE_CTR
};

/* Hash types */
enum nfp_ipsec_sa_hash_type {
	NFP_IPSEC_HASH_NONE,
	NFP_IPSEC_HASH_MD5_96,
	NFP_IPSEC_HASH_SHA1_96,
	NFP_IPSEC_HASH_SHA256_96,
	NFP_IPSEC_HASH_SHA384_96,
	NFP_IPSEC_HASH_SHA512_96,
	NFP_IPSEC_HASH_MD5_128,
	NFP_IPSEC_HASH_SHA1_80,
	NFP_IPSEC_HASH_SHA256_128,
	NFP_IPSEC_HASH_SHA384_192,
	NFP_IPSEC_HASH_SHA512_256,
	NFP_IPSEC_HASH_GF128_128,
	NFP_IPSEC_HASH_POLY1305_128
};

/* IPSEC_CFG_MSSG_ADD_SA */
struct nfp_ipsec_cfg_add_sa {
	u32 ciph_key[8];		  /* Cipher Key */
	union {
		u32 auth_key[16];	  /* Authentication Key */
		struct nfp_ipsec_aesgcm { /* AES-GCM-ESP fields */
			u32 salt;	  /* Initialized with SA */
			u32 resv[15];
		} aesgcm_fields;
	};
	struct sa_ctrl_word {
		uint32_t hash   :4;	  /* From nfp_ipsec_sa_hash_type */
		uint32_t cimode :4;	  /* From nfp_ipsec_sa_cipher_mode */
		uint32_t cipher :4;	  /* From nfp_ipsec_sa_cipher */
		uint32_t mode   :2;	  /* From nfp_ipsec_sa_mode */
		uint32_t proto  :2;	  /* From nfp_ipsec_sa_prot */
		uint32_t dir :1;	  /* SA direction */
		uint32_t resv0 :12;
		uint32_t encap_dsbl:1;	  /* Encap/Decap disable */
		uint32_t resv1 :2;	  /* Must be set to 0 */
	} ctrl_word;
	u32 spi;			  /* SPI Value */
	uint32_t pmtu_limit :16;          /* PMTU Limit */
	uint32_t resv0 :5;
	uint32_t ipv6       :1;		  /* Outbound IPv6 addr format */
	uint32_t resv1	 :10;
	u32 resv2[2];
	u32 src_ip[4];			  /* Src IP addr */
	u32 dst_ip[4];			  /* Dst IP addr */
	u32 resv3[6];
};

/* IPSEC_CFG_MSSG */
struct nfp_ipsec_cfg_mssg {
	union {
		struct{
			uint32_t cmd:16;     /* One of nfp_ipsec_cfg_mssg_cmd_codes */
			uint32_t rsp:16;     /* One of nfp_ipsec_cfg_mssg_rsp_codes */
			uint32_t sa_idx:16;  /* SA table index */
			uint32_t spare0:16;
			struct nfp_ipsec_cfg_add_sa cfg_add_sa;
		};
		u32 raw[64];
	};
};

static int nfp_net_ipsec_cfg(struct nfp_net *nn, struct nfp_mbox_amsg_entry *entry)
{
	unsigned int offset = nn->tlv_caps.mbox_off + NFP_NET_CFG_MBOX_SIMPLE_VAL;
	struct nfp_ipsec_cfg_mssg *msg = (struct nfp_ipsec_cfg_mssg *)entry->msg;
	int i, msg_size, ret;

	ret = nfp_net_mbox_lock(nn, sizeof(*msg));
	if (ret)
		return ret;

	msg_size = ARRAY_SIZE(msg->raw);
	for (i = 0; i < msg_size; i++)
		nn_writel(nn, offset + 4 * i, msg->raw[i]);

	ret = nfp_net_mbox_reconfig(nn, entry->cmd);
	if (ret < 0) {
		nn_ctrl_bar_unlock(nn);
		return ret;
	}

	/* For now we always read the whole message response back */
	for (i = 0; i < msg_size; i++)
		msg->raw[i] = nn_readl(nn, offset + 4 * i);

	nn_ctrl_bar_unlock(nn);

	switch (msg->rsp) {
	case NFP_IPSEC_CFG_MSSG_OK:
		return 0;
	case NFP_IPSEC_CFG_MSSG_SA_INVALID_CMD:
		return -EINVAL;
	case NFP_IPSEC_CFG_MSSG_SA_VALID:
		return -EEXIST;
	case NFP_IPSEC_CFG_MSSG_FAILED:
	case NFP_IPSEC_CFG_MSSG_SA_HASH_ADD_FAILED:
	case NFP_IPSEC_CFG_MSSG_SA_HASH_DEL_FAILED:
		return -EIO;
	default:
		return -EINVAL;
	}
}

static int set_aes_keylen(struct nfp_ipsec_cfg_add_sa *cfg, int alg, int keylen)
{
	bool aes_gmac = (alg == SADB_X_EALG_NULL_AES_GMAC);

	switch (keylen) {
	case 128:
		cfg->ctrl_word.cipher = aes_gmac ? NFP_IPSEC_CIPHER_AES128_NULL :
						   NFP_IPSEC_CIPHER_AES128;
		break;
	case 192:
		cfg->ctrl_word.cipher = aes_gmac ? NFP_IPSEC_CIPHER_AES192_NULL :
						   NFP_IPSEC_CIPHER_AES192;
		break;
	case 256:
		cfg->ctrl_word.cipher = aes_gmac ? NFP_IPSEC_CIPHER_AES256_NULL :
						   NFP_IPSEC_CIPHER_AES256;
		break;
	default:
		return -EINVAL;
	}

	return 0;
}

static void set_md5hmac(struct nfp_ipsec_cfg_add_sa *cfg, int *trunc_len)
{
	switch (*trunc_len) {
	case 96:
		cfg->ctrl_word.hash = NFP_IPSEC_HASH_MD5_96;
		break;
	case 128:
		cfg->ctrl_word.hash = NFP_IPSEC_HASH_MD5_128;
		break;
	default:
		*trunc_len = 0;
	}
}

static void set_sha1hmac(struct nfp_ipsec_cfg_add_sa *cfg, int *trunc_len)
{
	switch (*trunc_len) {
	case 96:
		cfg->ctrl_word.hash = NFP_IPSEC_HASH_SHA1_96;
		break;
	case 80:
		cfg->ctrl_word.hash = NFP_IPSEC_HASH_SHA1_80;
		break;
	default:
		*trunc_len = 0;
	}
}

static void set_sha2_256hmac(struct nfp_ipsec_cfg_add_sa *cfg, int *trunc_len)
{
	switch (*trunc_len) {
	case 96:
		cfg->ctrl_word.hash = NFP_IPSEC_HASH_SHA256_96;
		break;
	case 128:
		cfg->ctrl_word.hash = NFP_IPSEC_HASH_SHA256_128;
		break;
	default:
		*trunc_len = 0;
	}
}

static void set_sha2_384hmac(struct nfp_ipsec_cfg_add_sa *cfg, int *trunc_len)
{
	switch (*trunc_len) {
	case 96:
		cfg->ctrl_word.hash = NFP_IPSEC_HASH_SHA384_96;
		break;
	case 192:
		cfg->ctrl_word.hash = NFP_IPSEC_HASH_SHA384_192;
		break;
	default:
		*trunc_len = 0;
	}
}

static void set_sha2_512hmac(struct nfp_ipsec_cfg_add_sa *cfg, int *trunc_len)
{
	switch (*trunc_len) {
	case 96:
		cfg->ctrl_word.hash = NFP_IPSEC_HASH_SHA512_96;
		break;
	case 256:
		cfg->ctrl_word.hash = NFP_IPSEC_HASH_SHA512_256;
		break;
	default:
		*trunc_len = 0;
	}
}

static int nfp_net_xfrm_add_state(struct xfrm_state *x,
				  struct netlink_ext_ack *extack)
{
	struct net_device *netdev = x->xso.dev;
	struct nfp_ipsec_cfg_mssg msg = {};
	int i, key_len, trunc_len, err = 0;
	struct nfp_ipsec_cfg_add_sa *cfg;
	struct nfp_net *nn;
	unsigned int saidx;

	nn = netdev_priv(netdev);
	cfg = &msg.cfg_add_sa;

	/* General */
	switch (x->props.mode) {
	case XFRM_MODE_TUNNEL:
		cfg->ctrl_word.mode = NFP_IPSEC_PROTMODE_TUNNEL;
		break;
	case XFRM_MODE_TRANSPORT:
		cfg->ctrl_word.mode = NFP_IPSEC_PROTMODE_TRANSPORT;
		break;
	default:
		NL_SET_ERR_MSG_MOD(extack, "Unsupported mode for xfrm offload");
		return -EINVAL;
	}

	switch (x->id.proto) {
	case IPPROTO_ESP:
		cfg->ctrl_word.proto = NFP_IPSEC_PROTOCOL_ESP;
		break;
	case IPPROTO_AH:
		cfg->ctrl_word.proto = NFP_IPSEC_PROTOCOL_AH;
		break;
	default:
		NL_SET_ERR_MSG_MOD(extack, "Unsupported protocol for xfrm offload");
		return -EINVAL;
	}

	if (x->props.flags & XFRM_STATE_ESN) {
		NL_SET_ERR_MSG_MOD(extack, "Unsupported XFRM_REPLAY_MODE_ESN for xfrm offload");
		return -EINVAL;
	}

	if (x->xso.type != XFRM_DEV_OFFLOAD_CRYPTO) {
		NL_SET_ERR_MSG_MOD(extack, "Unsupported xfrm offload type");
		return -EINVAL;
	}

	cfg->spi = ntohl(x->id.spi);

	/* Hash/Authentication */
	if (x->aalg)
		trunc_len = x->aalg->alg_trunc_len;
	else
		trunc_len = 0;

	switch (x->props.aalgo) {
	case SADB_AALG_NONE:
		if (x->aead) {
			trunc_len = -1;
		} else {
			NL_SET_ERR_MSG_MOD(extack, "Unsupported authentication algorithm");
			return -EINVAL;
		}
		break;
	case SADB_X_AALG_NULL:
		cfg->ctrl_word.hash = NFP_IPSEC_HASH_NONE;
		trunc_len = -1;
		break;
	case SADB_AALG_MD5HMAC:
		if (nn->pdev->device == PCI_DEVICE_ID_NFP3800) {
			NL_SET_ERR_MSG_MOD(extack, "Unsupported authentication algorithm");
			return -EINVAL;
		}
		set_md5hmac(cfg, &trunc_len);
		break;
	case SADB_AALG_SHA1HMAC:
		set_sha1hmac(cfg, &trunc_len);
		break;
	case SADB_X_AALG_SHA2_256HMAC:
		set_sha2_256hmac(cfg, &trunc_len);
		break;
	case SADB_X_AALG_SHA2_384HMAC:
		set_sha2_384hmac(cfg, &trunc_len);
		break;
	case SADB_X_AALG_SHA2_512HMAC:
		set_sha2_512hmac(cfg, &trunc_len);
		break;
	default:
		NL_SET_ERR_MSG_MOD(extack, "Unsupported authentication algorithm");
		return -EINVAL;
	}

	if (!trunc_len) {
		NL_SET_ERR_MSG_MOD(extack, "Unsupported authentication algorithm trunc length");
		return -EINVAL;
	}

	if (x->aalg) {
		key_len = DIV_ROUND_UP(x->aalg->alg_key_len, BITS_PER_BYTE);
		if (key_len > sizeof(cfg->auth_key)) {
			NL_SET_ERR_MSG_MOD(extack, "Insufficient space for offloaded auth key");
			return -EINVAL;
		}
		for (i = 0; i < key_len / sizeof(cfg->auth_key[0]) ; i++)
			cfg->auth_key[i] = get_unaligned_be32(x->aalg->alg_key +
							      sizeof(cfg->auth_key[0]) * i);
	}

	/* Encryption */
	switch (x->props.ealgo) {
	case SADB_EALG_NONE:
	case SADB_EALG_NULL:
		cfg->ctrl_word.cimode = NFP_IPSEC_CIMODE_CBC;
		cfg->ctrl_word.cipher = NFP_IPSEC_CIPHER_NULL;
		break;
	case SADB_EALG_3DESCBC:
		if (nn->pdev->device == PCI_DEVICE_ID_NFP3800) {
			NL_SET_ERR_MSG_MOD(extack, "Unsupported encryption algorithm for offload");
			return -EINVAL;
		}
		cfg->ctrl_word.cimode = NFP_IPSEC_CIMODE_CBC;
		cfg->ctrl_word.cipher = NFP_IPSEC_CIPHER_3DES;
		break;
	case SADB_X_EALG_AES_GCM_ICV16:
	case SADB_X_EALG_NULL_AES_GMAC:
		if (!x->aead) {
			NL_SET_ERR_MSG_MOD(extack, "Invalid AES key data");
			return -EINVAL;
		}

		if (x->aead->alg_icv_len != 128) {
			NL_SET_ERR_MSG_MOD(extack, "ICV must be 128bit with SADB_X_EALG_AES_GCM_ICV16");
			return -EINVAL;
		}
		cfg->ctrl_word.cimode = NFP_IPSEC_CIMODE_CTR;
		cfg->ctrl_word.hash = NFP_IPSEC_HASH_GF128_128;

		/* Aead->alg_key_len includes 32-bit salt */
		if (set_aes_keylen(cfg, x->props.ealgo, x->aead->alg_key_len - 32)) {
			NL_SET_ERR_MSG_MOD(extack, "Unsupported AES key length");
			return -EINVAL;
		}
		break;
	case SADB_X_EALG_AESCBC:
		cfg->ctrl_word.cimode = NFP_IPSEC_CIMODE_CBC;
		if (!x->ealg) {
			NL_SET_ERR_MSG_MOD(extack, "Invalid AES key data");
			return -EINVAL;
		}
		if (set_aes_keylen(cfg, x->props.ealgo, x->ealg->alg_key_len) < 0) {
			NL_SET_ERR_MSG_MOD(extack, "Unsupported AES key length");
			return -EINVAL;
		}
		break;
	default:
		NL_SET_ERR_MSG_MOD(extack, "Unsupported encryption algorithm for offload");
		return -EINVAL;
	}

	if (x->aead) {
		int salt_len = 4;

		key_len = DIV_ROUND_UP(x->aead->alg_key_len, BITS_PER_BYTE);
		key_len -= salt_len;

		if (key_len > sizeof(cfg->ciph_key)) {
			NL_SET_ERR_MSG_MOD(extack, "aead: Insufficient space for offloaded key");
			return -EINVAL;
		}

		for (i = 0; i < key_len / sizeof(cfg->ciph_key[0]) ; i++)
			cfg->ciph_key[i] = get_unaligned_be32(x->aead->alg_key +
							      sizeof(cfg->ciph_key[0]) * i);

		/* Load up the salt */
		cfg->aesgcm_fields.salt = get_unaligned_be32(x->aead->alg_key + key_len);
	}

	if (x->ealg) {
		key_len = DIV_ROUND_UP(x->ealg->alg_key_len, BITS_PER_BYTE);

		if (key_len > sizeof(cfg->ciph_key)) {
			NL_SET_ERR_MSG_MOD(extack, "ealg: Insufficient space for offloaded key");
			return -EINVAL;
		}
		for (i = 0; i < key_len / sizeof(cfg->ciph_key[0]) ; i++)
			cfg->ciph_key[i] = get_unaligned_be32(x->ealg->alg_key +
							      sizeof(cfg->ciph_key[0]) * i);
	}

	/* IP related info */
	switch (x->props.family) {
	case AF_INET:
		cfg->ipv6 = 0;
		cfg->src_ip[0] = ntohl(x->props.saddr.a4);
		cfg->dst_ip[0] = ntohl(x->id.daddr.a4);
		break;
	case AF_INET6:
		cfg->ipv6 = 1;
		for (i = 0; i < 4; i++) {
			cfg->src_ip[i] = ntohl(x->props.saddr.a6[i]);
			cfg->dst_ip[i] = ntohl(x->id.daddr.a6[i]);
		}
		break;
	default:
		NL_SET_ERR_MSG_MOD(extack, "Unsupported address family");
		return -EINVAL;
	}

	/* Maximum nic IPsec code could handle. Other limits may apply. */
	cfg->pmtu_limit = 0xffff;
	cfg->ctrl_word.encap_dsbl = 1;

	/* SA direction */
	cfg->ctrl_word.dir = x->xso.dir;

	/* Find unused SA data*/
	err = xa_alloc(&nn->xa_ipsec, &saidx, x,
		       XA_LIMIT(0, NFP_NET_IPSEC_MAX_SA_CNT - 1), GFP_KERNEL);
	if (err < 0) {
		NL_SET_ERR_MSG_MOD(extack, "Unable to get sa_data number for IPsec");
		return err;
	}

	/* Allocate saidx and commit the SA */
	msg.cmd = NFP_IPSEC_CFG_MSSG_ADD_SA;
	msg.sa_idx = saidx;
	err = nfp_net_sched_mbox_amsg_work(nn, NFP_NET_CFG_MBOX_CMD_IPSEC, &msg,
					   sizeof(msg), nfp_net_ipsec_cfg);
	if (err) {
		xa_erase(&nn->xa_ipsec, saidx);
		NL_SET_ERR_MSG_MOD(extack, "Failed to issue IPsec command");
		return err;
	}

	/* 0 is invalid offload_handle for kernel */
	x->xso.offload_handle = saidx + 1;
	return 0;
}

static void nfp_net_xfrm_del_state(struct xfrm_state *x)
{
	struct nfp_ipsec_cfg_mssg msg = {
		.cmd = NFP_IPSEC_CFG_MSSG_INV_SA,
		.sa_idx = x->xso.offload_handle - 1,
	};
	struct net_device *netdev = x->xso.dev;
	struct nfp_net *nn;
	int err;

	nn = netdev_priv(netdev);
	err = nfp_net_sched_mbox_amsg_work(nn, NFP_NET_CFG_MBOX_CMD_IPSEC, &msg,
					   sizeof(msg), nfp_net_ipsec_cfg);
	if (err)
		nn_warn(nn, "Failed to invalidate SA in hardware\n");

	xa_erase(&nn->xa_ipsec, x->xso.offload_handle - 1);
}

static bool nfp_net_ipsec_offload_ok(struct sk_buff *skb, struct xfrm_state *x)
{
	if (x->props.family == AF_INET)
		/* Offload with IPv4 options is not supported yet */
		return ip_hdr(skb)->ihl == 5;

	/* Offload with IPv6 extension headers is not support yet */
	return !(ipv6_ext_hdr(ipv6_hdr(skb)->nexthdr));
}

static const struct xfrmdev_ops nfp_net_ipsec_xfrmdev_ops = {
	.xdo_dev_state_add = nfp_net_xfrm_add_state,
	.xdo_dev_state_delete = nfp_net_xfrm_del_state,
	.xdo_dev_offload_ok = nfp_net_ipsec_offload_ok,
};

void nfp_net_ipsec_init(struct nfp_net *nn)
{
	if (!(nn->cap_w1 & NFP_NET_CFG_CTRL_IPSEC))
		return;

	xa_init_flags(&nn->xa_ipsec, XA_FLAGS_ALLOC);
	nn->dp.netdev->xfrmdev_ops = &nfp_net_ipsec_xfrmdev_ops;
}

void nfp_net_ipsec_clean(struct nfp_net *nn)
{
	if (!(nn->cap_w1 & NFP_NET_CFG_CTRL_IPSEC))
		return;

	WARN_ON(!xa_empty(&nn->xa_ipsec));
	xa_destroy(&nn->xa_ipsec);
}

bool nfp_net_ipsec_tx_prep(struct nfp_net_dp *dp, struct sk_buff *skb,
			   struct nfp_ipsec_offload *offload_info)
{
	struct xfrm_offload *xo = xfrm_offload(skb);
	struct xfrm_state *x;

	x = xfrm_input_state(skb);
	if (!x)
		return false;

	offload_info->seq_hi = xo->seq.hi;
	offload_info->seq_low = xo->seq.low;
	offload_info->handle = x->xso.offload_handle;

	return true;
}

int nfp_net_ipsec_rx(struct nfp_meta_parsed *meta, struct sk_buff *skb)
{
	struct net_device *netdev = skb->dev;
	struct xfrm_offload *xo;
	struct xfrm_state *x;
	struct sec_path *sp;
	struct nfp_net *nn;
	u32 saidx;

	nn = netdev_priv(netdev);

	saidx = meta->ipsec_saidx - 1;
	if (saidx >= NFP_NET_IPSEC_MAX_SA_CNT)
		return -EINVAL;

	sp = secpath_set(skb);
	if (unlikely(!sp))
		return -ENOMEM;

	xa_lock(&nn->xa_ipsec);
	x = xa_load(&nn->xa_ipsec, saidx);
	xa_unlock(&nn->xa_ipsec);
	if (!x)
		return -EINVAL;

	xfrm_state_hold(x);
	sp->xvec[sp->len++] = x;
	sp->olen++;
	xo = xfrm_offload(skb);
	xo->flags = CRYPTO_DONE;
	xo->status = CRYPTO_SUCCESS;

	return 0;
}