summaryrefslogtreecommitdiffstats
path: root/drivers/net/ethernet/chelsio/inline_crypto/chtls/chtls.h
blob: 72bb123d53db73e58875431784c2bf3fa351d594 (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
/* SPDX-License-Identifier: GPL-2.0-only */
/*
 * Copyright (c) 2018 Chelsio Communications, Inc.
 */

#ifndef __CHTLS_H__
#define __CHTLS_H__

#include <crypto/aes.h>
#include <crypto/algapi.h>
#include <crypto/hash.h>
#include <crypto/sha1.h>
#include <crypto/sha2.h>
#include <crypto/authenc.h>
#include <crypto/ctr.h>
#include <crypto/gf128mul.h>
#include <crypto/internal/aead.h>
#include <crypto/null.h>
#include <crypto/internal/skcipher.h>
#include <crypto/aead.h>
#include <crypto/scatterwalk.h>
#include <crypto/internal/hash.h>
#include <linux/tls.h>
#include <net/tls.h>
#include <net/tls_toe.h>

#include "t4fw_api.h"
#include "t4_msg.h"
#include "cxgb4.h"
#include "cxgb4_uld.h"
#include "l2t.h"
#include "chcr_algo.h"
#include "chcr_core.h"
#include "chcr_crypto.h"

#define CHTLS_DRV_VERSION "1.0.0.0-ko"

#define TLS_KEYCTX_RXFLIT_CNT_S 24
#define TLS_KEYCTX_RXFLIT_CNT_V(x) ((x) << TLS_KEYCTX_RXFLIT_CNT_S)

#define TLS_KEYCTX_RXPROT_VER_S 20
#define TLS_KEYCTX_RXPROT_VER_M 0xf
#define TLS_KEYCTX_RXPROT_VER_V(x) ((x) << TLS_KEYCTX_RXPROT_VER_S)

#define TLS_KEYCTX_RXCIPH_MODE_S 16
#define TLS_KEYCTX_RXCIPH_MODE_M 0xf
#define TLS_KEYCTX_RXCIPH_MODE_V(x) ((x) << TLS_KEYCTX_RXCIPH_MODE_S)

#define TLS_KEYCTX_RXAUTH_MODE_S 12
#define TLS_KEYCTX_RXAUTH_MODE_M 0xf
#define TLS_KEYCTX_RXAUTH_MODE_V(x) ((x) << TLS_KEYCTX_RXAUTH_MODE_S)

#define TLS_KEYCTX_RXCIAU_CTRL_S 11
#define TLS_KEYCTX_RXCIAU_CTRL_V(x) ((x) << TLS_KEYCTX_RXCIAU_CTRL_S)

#define TLS_KEYCTX_RX_SEQCTR_S 9
#define TLS_KEYCTX_RX_SEQCTR_M 0x3
#define TLS_KEYCTX_RX_SEQCTR_V(x) ((x) << TLS_KEYCTX_RX_SEQCTR_S)

#define TLS_KEYCTX_RX_VALID_S 8
#define TLS_KEYCTX_RX_VALID_V(x) ((x) << TLS_KEYCTX_RX_VALID_S)

#define TLS_KEYCTX_RXCK_SIZE_S 3
#define TLS_KEYCTX_RXCK_SIZE_M 0x7
#define TLS_KEYCTX_RXCK_SIZE_V(x) ((x) << TLS_KEYCTX_RXCK_SIZE_S)

#define TLS_KEYCTX_RXMK_SIZE_S 0
#define TLS_KEYCTX_RXMK_SIZE_M 0x7
#define TLS_KEYCTX_RXMK_SIZE_V(x) ((x) << TLS_KEYCTX_RXMK_SIZE_S)

#define KEYCTX_TX_WR_IV_S  55
#define KEYCTX_TX_WR_IV_M  0x1ffULL
#define KEYCTX_TX_WR_IV_V(x) ((x) << KEYCTX_TX_WR_IV_S)
#define KEYCTX_TX_WR_IV_G(x) \
	(((x) >> KEYCTX_TX_WR_IV_S) & KEYCTX_TX_WR_IV_M)

#define KEYCTX_TX_WR_AAD_S 47
#define KEYCTX_TX_WR_AAD_M 0xffULL
#define KEYCTX_TX_WR_AAD_V(x) ((x) << KEYCTX_TX_WR_AAD_S)
#define KEYCTX_TX_WR_AAD_G(x) (((x) >> KEYCTX_TX_WR_AAD_S) & \
				KEYCTX_TX_WR_AAD_M)

#define KEYCTX_TX_WR_AADST_S 39
#define KEYCTX_TX_WR_AADST_M 0xffULL
#define KEYCTX_TX_WR_AADST_V(x) ((x) << KEYCTX_TX_WR_AADST_S)
#define KEYCTX_TX_WR_AADST_G(x) \
	(((x) >> KEYCTX_TX_WR_AADST_S) & KEYCTX_TX_WR_AADST_M)

#define KEYCTX_TX_WR_CIPHER_S 30
#define KEYCTX_TX_WR_CIPHER_M 0x1ffULL
#define KEYCTX_TX_WR_CIPHER_V(x) ((x) << KEYCTX_TX_WR_CIPHER_S)
#define KEYCTX_TX_WR_CIPHER_G(x) \
	(((x) >> KEYCTX_TX_WR_CIPHER_S) & KEYCTX_TX_WR_CIPHER_M)

#define KEYCTX_TX_WR_CIPHERST_S 23
#define KEYCTX_TX_WR_CIPHERST_M 0x7f
#define KEYCTX_TX_WR_CIPHERST_V(x) ((x) << KEYCTX_TX_WR_CIPHERST_S)
#define KEYCTX_TX_WR_CIPHERST_G(x) \
	(((x) >> KEYCTX_TX_WR_CIPHERST_S) & KEYCTX_TX_WR_CIPHERST_M)

#define KEYCTX_TX_WR_AUTH_S 14
#define KEYCTX_TX_WR_AUTH_M 0x1ff
#define KEYCTX_TX_WR_AUTH_V(x) ((x) << KEYCTX_TX_WR_AUTH_S)
#define KEYCTX_TX_WR_AUTH_G(x) \
	(((x) >> KEYCTX_TX_WR_AUTH_S) & KEYCTX_TX_WR_AUTH_M)

#define KEYCTX_TX_WR_AUTHST_S 7
#define KEYCTX_TX_WR_AUTHST_M 0x7f
#define KEYCTX_TX_WR_AUTHST_V(x) ((x) << KEYCTX_TX_WR_AUTHST_S)
#define KEYCTX_TX_WR_AUTHST_G(x) \
	(((x) >> KEYCTX_TX_WR_AUTHST_S) & KEYCTX_TX_WR_AUTHST_M)

#define KEYCTX_TX_WR_AUTHIN_S 0
#define KEYCTX_TX_WR_AUTHIN_M 0x7f
#define KEYCTX_TX_WR_AUTHIN_V(x) ((x) << KEYCTX_TX_WR_AUTHIN_S)
#define KEYCTX_TX_WR_AUTHIN_G(x) \
	(((x) >> KEYCTX_TX_WR_AUTHIN_S) & KEYCTX_TX_WR_AUTHIN_M)

struct sge_opaque_hdr {
	void *dev;
	dma_addr_t addr[MAX_SKB_FRAGS + 1];
};

#define MAX_IVS_PAGE			256
#define TLS_KEY_CONTEXT_SZ		64
#define CIPHER_BLOCK_SIZE		16
#define GCM_TAG_SIZE			16
#define KEY_ON_MEM_SZ			16
#define AEAD_EXPLICIT_DATA_SIZE		8
#define TLS_HEADER_LENGTH		5
#define SCMD_CIPH_MODE_AES_GCM		2
/* Any MFS size should work and come from openssl */
#define TLS_MFS				16384

#define RSS_HDR sizeof(struct rss_header)
#define TLS_WR_CPL_LEN \
	(sizeof(struct fw_tlstx_data_wr) + sizeof(struct cpl_tx_tls_sfo))

enum {
	CHTLS_KEY_CONTEXT_DSGL,
	CHTLS_KEY_CONTEXT_IMM,
	CHTLS_KEY_CONTEXT_DDR,
};

enum {
	CHTLS_LISTEN_START,
	CHTLS_LISTEN_STOP,
};

/* Flags for return value of CPL message handlers */
enum {
	CPL_RET_BUF_DONE =    1,   /* buffer processing done */
	CPL_RET_BAD_MSG =     2,   /* bad CPL message */
	CPL_RET_UNKNOWN_TID = 4    /* unexpected unknown TID */
};

#define LISTEN_INFO_HASH_SIZE 32
#define RSPQ_HASH_BITS 5
struct listen_info {
	struct listen_info *next;  /* Link to next entry */
	struct sock *sk;           /* The listening socket */
	unsigned int stid;         /* The server TID */
};

enum {
	T4_LISTEN_START_PENDING,
	T4_LISTEN_STARTED
};

enum csk_flags {
	CSK_CALLBACKS_CHKD,	/* socket callbacks have been sanitized */
	CSK_ABORT_REQ_RCVD,	/* received one ABORT_REQ_RSS message */
	CSK_TX_MORE_DATA,	/* sending ULP data; don't set SHOVE bit */
	CSK_TX_WAIT_IDLE,	/* suspend Tx until in-flight data is ACKed */
	CSK_ABORT_SHUTDOWN,	/* shouldn't send more abort requests */
	CSK_ABORT_RPL_PENDING,	/* expecting an abort reply */
	CSK_CLOSE_CON_REQUESTED,/* we've sent a close_conn_req */
	CSK_TX_DATA_SENT,	/* sent a TX_DATA WR on this connection */
	CSK_TX_FAILOVER,	/* Tx traffic failing over */
	CSK_UPDATE_RCV_WND,	/* Need to update rcv window */
	CSK_RST_ABORTED,	/* outgoing RST was aborted */
	CSK_TLS_HANDSHK,	/* TLS Handshake */
	CSK_CONN_INLINE,	/* Connection on HW */
};

enum chtls_cdev_state {
	CHTLS_CDEV_STATE_UP = 1
};

struct listen_ctx {
	struct sock *lsk;
	struct chtls_dev *cdev;
	struct sk_buff_head synq;
	u32 state;
};

struct key_map {
	unsigned long *addr;
	unsigned int start;
	unsigned int available;
	unsigned int size;
	spinlock_t lock; /* lock for key id request from map */
} __packed;

struct tls_scmd {
	u32 seqno_numivs;
	u32 ivgen_hdrlen;
};

struct chtls_dev {
	struct tls_toe_device tlsdev;
	struct list_head list;
	struct cxgb4_lld_info *lldi;
	struct pci_dev *pdev;
	struct listen_info *listen_hash_tab[LISTEN_INFO_HASH_SIZE];
	spinlock_t listen_lock; /* lock for listen list */
	struct net_device **ports;
	struct tid_info *tids;
	unsigned int pfvf;
	const unsigned short *mtus;

	struct idr hwtid_idr;
	struct idr stid_idr;

	spinlock_t idr_lock ____cacheline_aligned_in_smp;

	struct net_device *egr_dev[NCHAN * 2];
	struct sk_buff *rspq_skb_cache[1 << RSPQ_HASH_BITS];
	struct sk_buff *askb;

	struct sk_buff_head deferq;
	struct work_struct deferq_task;

	struct list_head list_node;
	struct list_head rcu_node;
	struct list_head na_node;
	unsigned int send_page_order;
	int max_host_sndbuf;
	u32 round_robin_cnt;
	struct key_map kmap;
	unsigned int cdev_state;
};

struct chtls_listen {
	struct chtls_dev *cdev;
	struct sock *sk;
};

struct chtls_hws {
	struct sk_buff_head sk_recv_queue;
	u8 txqid;
	u8 ofld;
	u16 type;
	u16 rstate;
	u16 keyrpl;
	u16 pldlen;
	u16 rcvpld;
	u16 compute;
	u16 expansion;
	u16 keylen;
	u16 pdus;
	u16 adjustlen;
	u16 ivsize;
	u16 txleft;
	u32 mfs;
	s32 txkey;
	s32 rxkey;
	u32 fcplenmax;
	u32 copied_seq;
	u64 tx_seq_no;
	struct tls_scmd scmd;
	union {
		struct tls12_crypto_info_aes_gcm_128 aes_gcm_128;
		struct tls12_crypto_info_aes_gcm_256 aes_gcm_256;
	} crypto_info;
};

struct chtls_sock {
	struct sock *sk;
	struct chtls_dev *cdev;
	struct l2t_entry *l2t_entry;    /* pointer to the L2T entry */
	struct net_device *egress_dev;  /* TX_CHAN for act open retry */

	struct sk_buff_head txq;
	struct sk_buff *wr_skb_head;
	struct sk_buff *wr_skb_tail;
	struct sk_buff *ctrl_skb_cache;
	struct sk_buff *txdata_skb_cache; /* abort path messages */
	struct kref kref;
	unsigned long flags;
	u32 opt2;
	u32 wr_credits;
	u32 wr_unacked;
	u32 wr_max_credits;
	u32 wr_nondata;
	u32 hwtid;               /* TCP Control Block ID */
	u32 txq_idx;
	u32 rss_qid;
	u32 tid;
	u32 idr;
	u32 mss;
	u32 ulp_mode;
	u32 tx_chan;
	u32 rx_chan;
	u32 sndbuf;
	u32 txplen_max;
	u32 mtu_idx;           /* MTU table index */
	u32 smac_idx;
	u8 port_id;
	u8 tos;
	u16 resv2;
	u32 delack_mode;
	u32 delack_seq;
	u32 snd_win;
	u32 rcv_win;

	void *passive_reap_next;        /* placeholder for passive */
	struct chtls_hws tlshws;
	struct synq {
		struct sk_buff *next;
		struct sk_buff *prev;
	} synq;
	struct listen_ctx *listen_ctx;
};

struct tls_hdr {
	u8  type;
	u16 version;
	u16 length;
} __packed;

struct tlsrx_cmp_hdr {
	u8  type;
	u16 version;
	u16 length;

	u64 tls_seq;
	u16 reserved1;
	u8  res_to_mac_error;
} __packed;

/* res_to_mac_error fields */
#define TLSRX_HDR_PKT_INT_ERROR_S   4
#define TLSRX_HDR_PKT_INT_ERROR_M   0x1
#define TLSRX_HDR_PKT_INT_ERROR_V(x) \
	((x) << TLSRX_HDR_PKT_INT_ERROR_S)
#define TLSRX_HDR_PKT_INT_ERROR_G(x) \
	(((x) >> TLSRX_HDR_PKT_INT_ERROR_S) & TLSRX_HDR_PKT_INT_ERROR_M)
#define TLSRX_HDR_PKT_INT_ERROR_F   TLSRX_HDR_PKT_INT_ERROR_V(1U)

#define TLSRX_HDR_PKT_SPP_ERROR_S        3
#define TLSRX_HDR_PKT_SPP_ERROR_M        0x1
#define TLSRX_HDR_PKT_SPP_ERROR_V(x)     ((x) << TLSRX_HDR_PKT_SPP_ERROR)
#define TLSRX_HDR_PKT_SPP_ERROR_G(x)     \
	(((x) >> TLSRX_HDR_PKT_SPP_ERROR_S) & TLSRX_HDR_PKT_SPP_ERROR_M)
#define TLSRX_HDR_PKT_SPP_ERROR_F        TLSRX_HDR_PKT_SPP_ERROR_V(1U)

#define TLSRX_HDR_PKT_CCDX_ERROR_S       2
#define TLSRX_HDR_PKT_CCDX_ERROR_M       0x1
#define TLSRX_HDR_PKT_CCDX_ERROR_V(x)    ((x) << TLSRX_HDR_PKT_CCDX_ERROR_S)
#define TLSRX_HDR_PKT_CCDX_ERROR_G(x)    \
	(((x) >> TLSRX_HDR_PKT_CCDX_ERROR_S) & TLSRX_HDR_PKT_CCDX_ERROR_M)
#define TLSRX_HDR_PKT_CCDX_ERROR_F       TLSRX_HDR_PKT_CCDX_ERROR_V(1U)

#define TLSRX_HDR_PKT_PAD_ERROR_S        1
#define TLSRX_HDR_PKT_PAD_ERROR_M        0x1
#define TLSRX_HDR_PKT_PAD_ERROR_V(x)     ((x) << TLSRX_HDR_PKT_PAD_ERROR_S)
#define TLSRX_HDR_PKT_PAD_ERROR_G(x)     \
	(((x) >> TLSRX_HDR_PKT_PAD_ERROR_S) & TLSRX_HDR_PKT_PAD_ERROR_M)
#define TLSRX_HDR_PKT_PAD_ERROR_F        TLSRX_HDR_PKT_PAD_ERROR_V(1U)

#define TLSRX_HDR_PKT_MAC_ERROR_S        0
#define TLSRX_HDR_PKT_MAC_ERROR_M        0x1
#define TLSRX_HDR_PKT_MAC_ERROR_V(x)     ((x) << TLSRX_HDR_PKT_MAC_ERROR)
#define TLSRX_HDR_PKT_MAC_ERROR_G(x)     \
	(((x) >> S_TLSRX_HDR_PKT_MAC_ERROR_S) & TLSRX_HDR_PKT_MAC_ERROR_M)
#define TLSRX_HDR_PKT_MAC_ERROR_F        TLSRX_HDR_PKT_MAC_ERROR_V(1U)

#define TLSRX_HDR_PKT_ERROR_M           0x1F
#define CONTENT_TYPE_ERROR		0x7F

struct ulp_mem_rw {
	__be32 cmd;
	__be32 len16;             /* command length */
	__be32 dlen;              /* data length in 32-byte units */
	__be32 lock_addr;
};

struct tls_key_wr {
	__be32 op_to_compl;
	__be32 flowid_len16;
	__be32 ftid;
	u8   reneg_to_write_rx;
	u8   protocol;
	__be16 mfs;
};

struct tls_key_req {
	struct tls_key_wr wr;
	struct ulp_mem_rw req;
	struct ulptx_idata sc_imm;
};

/*
 * This lives in skb->cb and is used to chain WRs in a linked list.
 */
struct wr_skb_cb {
	struct l2t_skb_cb l2t;          /* reserve space for l2t CB */
	struct sk_buff *next_wr;        /* next write request */
};

/* Per-skb backlog handler.  Run when a socket's backlog is processed. */
struct blog_skb_cb {
	void (*backlog_rcv)(struct sock *sk, struct sk_buff *skb);
	struct chtls_dev *cdev;
};

/*
 * Similar to tcp_skb_cb but with ULP elements added to support TLS,
 * etc.
 */
struct ulp_skb_cb {
	struct wr_skb_cb wr;		/* reserve space for write request */
	u16 flags;			/* TCP-like flags */
	u8 psh;
	u8 ulp_mode;			/* ULP mode/submode of sk_buff */
	u32 seq;			/* TCP sequence number */
	union { /* ULP-specific fields */
		struct {
			u8  type;
			u8  ofld;
			u8  iv;
		} tls;
	} ulp;
};

#define ULP_SKB_CB(skb) ((struct ulp_skb_cb *)&((skb)->cb[0]))
#define BLOG_SKB_CB(skb) ((struct blog_skb_cb *)(skb)->cb)

/*
 * Flags for ulp_skb_cb.flags.
 */
enum {
	ULPCB_FLAG_NEED_HDR  = 1 << 0,	/* packet needs a TX_DATA_WR header */
	ULPCB_FLAG_NO_APPEND = 1 << 1,	/* don't grow this skb */
	ULPCB_FLAG_BARRIER   = 1 << 2,	/* set TX_WAIT_IDLE after sending */
	ULPCB_FLAG_HOLD      = 1 << 3,	/* skb not ready for Tx yet */
	ULPCB_FLAG_COMPL     = 1 << 4,	/* request WR completion */
	ULPCB_FLAG_URG       = 1 << 5,	/* urgent data */
	ULPCB_FLAG_TLS_HDR   = 1 << 6,  /* payload with tls hdr */
	ULPCB_FLAG_NO_HDR    = 1 << 7,  /* not a ofld wr */
};

/* The ULP mode/submode of an skbuff */
#define skb_ulp_mode(skb)  (ULP_SKB_CB(skb)->ulp_mode)
#define TCP_PAGE(sk)   (sk->sk_frag.page)
#define TCP_OFF(sk)    (sk->sk_frag.offset)

static inline struct chtls_dev *to_chtls_dev(struct tls_toe_device *tlsdev)
{
	return container_of(tlsdev, struct chtls_dev, tlsdev);
}

static inline void csk_set_flag(struct chtls_sock *csk,
				enum csk_flags flag)
{
	__set_bit(flag, &csk->flags);
}

static inline void csk_reset_flag(struct chtls_sock *csk,
				  enum csk_flags flag)
{
	__clear_bit(flag, &csk->flags);
}

static inline bool csk_conn_inline(const struct chtls_sock *csk)
{
	return test_bit(CSK_CONN_INLINE, &csk->flags);
}

static inline int csk_flag(const struct sock *sk, enum csk_flags flag)
{
	struct chtls_sock *csk = rcu_dereference_sk_user_data(sk);

	if (!csk_conn_inline(csk))
		return 0;
	return test_bit(flag, &csk->flags);
}

static inline int csk_flag_nochk(const struct chtls_sock *csk,
				 enum csk_flags flag)
{
	return test_bit(flag, &csk->flags);
}

static inline void *cplhdr(struct sk_buff *skb)
{
	return skb->data;
}

static inline int is_neg_adv(unsigned int status)
{
	return status == CPL_ERR_RTX_NEG_ADVICE ||
	       status == CPL_ERR_KEEPALV_NEG_ADVICE ||
	       status == CPL_ERR_PERSIST_NEG_ADVICE;
}

static inline void process_cpl_msg(void (*fn)(struct sock *, struct sk_buff *),
				   struct sock *sk,
				   struct sk_buff *skb)
{
	skb_reset_mac_header(skb);
	skb_reset_network_header(skb);
	skb_reset_transport_header(skb);

	bh_lock_sock(sk);
	if (unlikely(sock_owned_by_user(sk))) {
		BLOG_SKB_CB(skb)->backlog_rcv = fn;
		__sk_add_backlog(sk, skb);
	} else {
		fn(sk, skb);
	}
	bh_unlock_sock(sk);
}

static inline void chtls_sock_free(struct kref *ref)
{
	struct chtls_sock *csk = container_of(ref, struct chtls_sock,
					      kref);
	kfree(csk);
}

static inline void __chtls_sock_put(const char *fn, struct chtls_sock *csk)
{
	kref_put(&csk->kref, chtls_sock_free);
}

static inline void __chtls_sock_get(const char *fn,
				    struct chtls_sock *csk)
{
	kref_get(&csk->kref);
}

static inline void send_or_defer(struct sock *sk, struct tcp_sock *tp,
				 struct sk_buff *skb, int through_l2t)
{
	struct chtls_sock *csk = rcu_dereference_sk_user_data(sk);

	if (through_l2t) {
		/* send through L2T */
		cxgb4_l2t_send(csk->egress_dev, skb, csk->l2t_entry);
	} else {
		/* send directly */
		cxgb4_ofld_send(csk->egress_dev, skb);
	}
}

typedef int (*chtls_handler_func)(struct chtls_dev *, struct sk_buff *);
extern chtls_handler_func chtls_handlers[NUM_CPL_CMDS];
void chtls_install_cpl_ops(struct sock *sk);
int chtls_init_kmap(struct chtls_dev *cdev, struct cxgb4_lld_info *lldi);
void chtls_listen_stop(struct chtls_dev *cdev, struct sock *sk);
int chtls_listen_start(struct chtls_dev *cdev, struct sock *sk);
void chtls_close(struct sock *sk, long timeout);
int chtls_disconnect(struct sock *sk, int flags);
void chtls_shutdown(struct sock *sk, int how);
void chtls_destroy_sock(struct sock *sk);
int chtls_sendmsg(struct sock *sk, struct msghdr *msg, size_t size);
int chtls_recvmsg(struct sock *sk, struct msghdr *msg,
		  size_t len, int nonblock, int flags, int *addr_len);
int chtls_sendpage(struct sock *sk, struct page *page,
		   int offset, size_t size, int flags);
int send_tx_flowc_wr(struct sock *sk, int compl,
		     u32 snd_nxt, u32 rcv_nxt);
void chtls_tcp_push(struct sock *sk, int flags);
int chtls_push_frames(struct chtls_sock *csk, int comp);
int chtls_set_tcb_tflag(struct sock *sk, unsigned int bit_pos, int val);
int chtls_setkey(struct chtls_sock *csk, u32 keylen, u32 mode, int cipher_type);
void skb_entail(struct sock *sk, struct sk_buff *skb, int flags);
unsigned int keyid_to_addr(int start_addr, int keyid);
void free_tls_keyid(struct sock *sk);
#endif