1 /* SPDX-License-Identifier: GPL-2.0-only */
2 /*
3  * Copyright (c) 2018 Chelsio Communications, Inc.
4  */
5 
6 #ifndef __CHTLS_H__
7 #define __CHTLS_H__
8 
9 #include <crypto/aes.h>
10 #include <crypto/algapi.h>
11 #include <crypto/hash.h>
12 #include <crypto/sha1.h>
13 #include <crypto/sha2.h>
14 #include <crypto/authenc.h>
15 #include <crypto/ctr.h>
16 #include <crypto/gf128mul.h>
17 #include <crypto/internal/aead.h>
18 #include <crypto/null.h>
19 #include <crypto/internal/skcipher.h>
20 #include <crypto/aead.h>
21 #include <crypto/scatterwalk.h>
22 #include <crypto/internal/hash.h>
23 #include <linux/tls.h>
24 #include <net/tls.h>
25 #include <net/tls_toe.h>
26 
27 #include "t4fw_api.h"
28 #include "t4_msg.h"
29 #include "cxgb4.h"
30 #include "cxgb4_uld.h"
31 #include "l2t.h"
32 #include "chcr_algo.h"
33 #include "chcr_core.h"
34 #include "chcr_crypto.h"
35 
36 #define CHTLS_DRV_VERSION "1.0.0.0-ko"
37 
38 #define TLS_KEYCTX_RXFLIT_CNT_S 24
39 #define TLS_KEYCTX_RXFLIT_CNT_V(x) ((x) << TLS_KEYCTX_RXFLIT_CNT_S)
40 
41 #define TLS_KEYCTX_RXPROT_VER_S 20
42 #define TLS_KEYCTX_RXPROT_VER_M 0xf
43 #define TLS_KEYCTX_RXPROT_VER_V(x) ((x) << TLS_KEYCTX_RXPROT_VER_S)
44 
45 #define TLS_KEYCTX_RXCIPH_MODE_S 16
46 #define TLS_KEYCTX_RXCIPH_MODE_M 0xf
47 #define TLS_KEYCTX_RXCIPH_MODE_V(x) ((x) << TLS_KEYCTX_RXCIPH_MODE_S)
48 
49 #define TLS_KEYCTX_RXAUTH_MODE_S 12
50 #define TLS_KEYCTX_RXAUTH_MODE_M 0xf
51 #define TLS_KEYCTX_RXAUTH_MODE_V(x) ((x) << TLS_KEYCTX_RXAUTH_MODE_S)
52 
53 #define TLS_KEYCTX_RXCIAU_CTRL_S 11
54 #define TLS_KEYCTX_RXCIAU_CTRL_V(x) ((x) << TLS_KEYCTX_RXCIAU_CTRL_S)
55 
56 #define TLS_KEYCTX_RX_SEQCTR_S 9
57 #define TLS_KEYCTX_RX_SEQCTR_M 0x3
58 #define TLS_KEYCTX_RX_SEQCTR_V(x) ((x) << TLS_KEYCTX_RX_SEQCTR_S)
59 
60 #define TLS_KEYCTX_RX_VALID_S 8
61 #define TLS_KEYCTX_RX_VALID_V(x) ((x) << TLS_KEYCTX_RX_VALID_S)
62 
63 #define TLS_KEYCTX_RXCK_SIZE_S 3
64 #define TLS_KEYCTX_RXCK_SIZE_M 0x7
65 #define TLS_KEYCTX_RXCK_SIZE_V(x) ((x) << TLS_KEYCTX_RXCK_SIZE_S)
66 
67 #define TLS_KEYCTX_RXMK_SIZE_S 0
68 #define TLS_KEYCTX_RXMK_SIZE_M 0x7
69 #define TLS_KEYCTX_RXMK_SIZE_V(x) ((x) << TLS_KEYCTX_RXMK_SIZE_S)
70 
71 #define KEYCTX_TX_WR_IV_S  55
72 #define KEYCTX_TX_WR_IV_M  0x1ffULL
73 #define KEYCTX_TX_WR_IV_V(x) ((x) << KEYCTX_TX_WR_IV_S)
74 #define KEYCTX_TX_WR_IV_G(x) \
75 	(((x) >> KEYCTX_TX_WR_IV_S) & KEYCTX_TX_WR_IV_M)
76 
77 #define KEYCTX_TX_WR_AAD_S 47
78 #define KEYCTX_TX_WR_AAD_M 0xffULL
79 #define KEYCTX_TX_WR_AAD_V(x) ((x) << KEYCTX_TX_WR_AAD_S)
80 #define KEYCTX_TX_WR_AAD_G(x) (((x) >> KEYCTX_TX_WR_AAD_S) & \
81 				KEYCTX_TX_WR_AAD_M)
82 
83 #define KEYCTX_TX_WR_AADST_S 39
84 #define KEYCTX_TX_WR_AADST_M 0xffULL
85 #define KEYCTX_TX_WR_AADST_V(x) ((x) << KEYCTX_TX_WR_AADST_S)
86 #define KEYCTX_TX_WR_AADST_G(x) \
87 	(((x) >> KEYCTX_TX_WR_AADST_S) & KEYCTX_TX_WR_AADST_M)
88 
89 #define KEYCTX_TX_WR_CIPHER_S 30
90 #define KEYCTX_TX_WR_CIPHER_M 0x1ffULL
91 #define KEYCTX_TX_WR_CIPHER_V(x) ((x) << KEYCTX_TX_WR_CIPHER_S)
92 #define KEYCTX_TX_WR_CIPHER_G(x) \
93 	(((x) >> KEYCTX_TX_WR_CIPHER_S) & KEYCTX_TX_WR_CIPHER_M)
94 
95 #define KEYCTX_TX_WR_CIPHERST_S 23
96 #define KEYCTX_TX_WR_CIPHERST_M 0x7f
97 #define KEYCTX_TX_WR_CIPHERST_V(x) ((x) << KEYCTX_TX_WR_CIPHERST_S)
98 #define KEYCTX_TX_WR_CIPHERST_G(x) \
99 	(((x) >> KEYCTX_TX_WR_CIPHERST_S) & KEYCTX_TX_WR_CIPHERST_M)
100 
101 #define KEYCTX_TX_WR_AUTH_S 14
102 #define KEYCTX_TX_WR_AUTH_M 0x1ff
103 #define KEYCTX_TX_WR_AUTH_V(x) ((x) << KEYCTX_TX_WR_AUTH_S)
104 #define KEYCTX_TX_WR_AUTH_G(x) \
105 	(((x) >> KEYCTX_TX_WR_AUTH_S) & KEYCTX_TX_WR_AUTH_M)
106 
107 #define KEYCTX_TX_WR_AUTHST_S 7
108 #define KEYCTX_TX_WR_AUTHST_M 0x7f
109 #define KEYCTX_TX_WR_AUTHST_V(x) ((x) << KEYCTX_TX_WR_AUTHST_S)
110 #define KEYCTX_TX_WR_AUTHST_G(x) \
111 	(((x) >> KEYCTX_TX_WR_AUTHST_S) & KEYCTX_TX_WR_AUTHST_M)
112 
113 #define KEYCTX_TX_WR_AUTHIN_S 0
114 #define KEYCTX_TX_WR_AUTHIN_M 0x7f
115 #define KEYCTX_TX_WR_AUTHIN_V(x) ((x) << KEYCTX_TX_WR_AUTHIN_S)
116 #define KEYCTX_TX_WR_AUTHIN_G(x) \
117 	(((x) >> KEYCTX_TX_WR_AUTHIN_S) & KEYCTX_TX_WR_AUTHIN_M)
118 
119 struct sge_opaque_hdr {
120 	void *dev;
121 	dma_addr_t addr[MAX_SKB_FRAGS + 1];
122 };
123 
124 #define MAX_IVS_PAGE			256
125 #define TLS_KEY_CONTEXT_SZ		64
126 #define CIPHER_BLOCK_SIZE		16
127 #define GCM_TAG_SIZE			16
128 #define KEY_ON_MEM_SZ			16
129 #define AEAD_EXPLICIT_DATA_SIZE		8
130 #define TLS_HEADER_LENGTH		5
131 #define SCMD_CIPH_MODE_AES_GCM		2
132 /* Any MFS size should work and come from openssl */
133 #define TLS_MFS				16384
134 
135 #define RSS_HDR sizeof(struct rss_header)
136 #define TLS_WR_CPL_LEN \
137 	(sizeof(struct fw_tlstx_data_wr) + sizeof(struct cpl_tx_tls_sfo))
138 
139 enum {
140 	CHTLS_KEY_CONTEXT_DSGL,
141 	CHTLS_KEY_CONTEXT_IMM,
142 	CHTLS_KEY_CONTEXT_DDR,
143 };
144 
145 enum {
146 	CHTLS_LISTEN_START,
147 	CHTLS_LISTEN_STOP,
148 };
149 
150 /* Flags for return value of CPL message handlers */
151 enum {
152 	CPL_RET_BUF_DONE =    1,   /* buffer processing done */
153 	CPL_RET_BAD_MSG =     2,   /* bad CPL message */
154 	CPL_RET_UNKNOWN_TID = 4    /* unexpected unknown TID */
155 };
156 
157 #define LISTEN_INFO_HASH_SIZE 32
158 #define RSPQ_HASH_BITS 5
159 struct listen_info {
160 	struct listen_info *next;  /* Link to next entry */
161 	struct sock *sk;           /* The listening socket */
162 	unsigned int stid;         /* The server TID */
163 };
164 
165 enum {
166 	T4_LISTEN_START_PENDING,
167 	T4_LISTEN_STARTED
168 };
169 
170 enum csk_flags {
171 	CSK_CALLBACKS_CHKD,	/* socket callbacks have been sanitized */
172 	CSK_ABORT_REQ_RCVD,	/* received one ABORT_REQ_RSS message */
173 	CSK_TX_MORE_DATA,	/* sending ULP data; don't set SHOVE bit */
174 	CSK_TX_WAIT_IDLE,	/* suspend Tx until in-flight data is ACKed */
175 	CSK_ABORT_SHUTDOWN,	/* shouldn't send more abort requests */
176 	CSK_ABORT_RPL_PENDING,	/* expecting an abort reply */
177 	CSK_CLOSE_CON_REQUESTED,/* we've sent a close_conn_req */
178 	CSK_TX_DATA_SENT,	/* sent a TX_DATA WR on this connection */
179 	CSK_TX_FAILOVER,	/* Tx traffic failing over */
180 	CSK_UPDATE_RCV_WND,	/* Need to update rcv window */
181 	CSK_RST_ABORTED,	/* outgoing RST was aborted */
182 	CSK_TLS_HANDSHK,	/* TLS Handshake */
183 	CSK_CONN_INLINE,	/* Connection on HW */
184 };
185 
186 enum chtls_cdev_state {
187 	CHTLS_CDEV_STATE_UP = 1
188 };
189 
190 struct listen_ctx {
191 	struct sock *lsk;
192 	struct chtls_dev *cdev;
193 	struct sk_buff_head synq;
194 	u32 state;
195 };
196 
197 struct key_map {
198 	unsigned long *addr;
199 	unsigned int start;
200 	unsigned int available;
201 	unsigned int size;
202 	spinlock_t lock; /* lock for key id request from map */
203 } __packed;
204 
205 struct tls_scmd {
206 	u32 seqno_numivs;
207 	u32 ivgen_hdrlen;
208 };
209 
210 struct chtls_dev {
211 	struct tls_toe_device tlsdev;
212 	struct list_head list;
213 	struct cxgb4_lld_info *lldi;
214 	struct pci_dev *pdev;
215 	struct listen_info *listen_hash_tab[LISTEN_INFO_HASH_SIZE];
216 	spinlock_t listen_lock; /* lock for listen list */
217 	struct net_device **ports;
218 	struct tid_info *tids;
219 	unsigned int pfvf;
220 	const unsigned short *mtus;
221 
222 	struct idr hwtid_idr;
223 	struct idr stid_idr;
224 
225 	spinlock_t idr_lock ____cacheline_aligned_in_smp;
226 
227 	struct net_device *egr_dev[NCHAN * 2];
228 	struct sk_buff *rspq_skb_cache[1 << RSPQ_HASH_BITS];
229 	struct sk_buff *askb;
230 
231 	struct sk_buff_head deferq;
232 	struct work_struct deferq_task;
233 
234 	struct list_head list_node;
235 	struct list_head rcu_node;
236 	struct list_head na_node;
237 	unsigned int send_page_order;
238 	int max_host_sndbuf;
239 	u32 round_robin_cnt;
240 	struct key_map kmap;
241 	unsigned int cdev_state;
242 };
243 
244 struct chtls_listen {
245 	struct chtls_dev *cdev;
246 	struct sock *sk;
247 };
248 
249 struct chtls_hws {
250 	struct sk_buff_head sk_recv_queue;
251 	u8 txqid;
252 	u8 ofld;
253 	u16 type;
254 	u16 rstate;
255 	u16 keyrpl;
256 	u16 pldlen;
257 	u16 rcvpld;
258 	u16 compute;
259 	u16 expansion;
260 	u16 keylen;
261 	u16 pdus;
262 	u16 adjustlen;
263 	u16 ivsize;
264 	u16 txleft;
265 	u32 mfs;
266 	s32 txkey;
267 	s32 rxkey;
268 	u32 fcplenmax;
269 	u32 copied_seq;
270 	u64 tx_seq_no;
271 	struct tls_scmd scmd;
272 	union {
273 		struct tls12_crypto_info_aes_gcm_128 aes_gcm_128;
274 		struct tls12_crypto_info_aes_gcm_256 aes_gcm_256;
275 	} crypto_info;
276 };
277 
278 struct chtls_sock {
279 	struct sock *sk;
280 	struct chtls_dev *cdev;
281 	struct l2t_entry *l2t_entry;    /* pointer to the L2T entry */
282 	struct net_device *egress_dev;  /* TX_CHAN for act open retry */
283 
284 	struct sk_buff_head txq;
285 	struct sk_buff *wr_skb_head;
286 	struct sk_buff *wr_skb_tail;
287 	struct sk_buff *ctrl_skb_cache;
288 	struct sk_buff *txdata_skb_cache; /* abort path messages */
289 	struct kref kref;
290 	unsigned long flags;
291 	u32 opt2;
292 	u32 wr_credits;
293 	u32 wr_unacked;
294 	u32 wr_max_credits;
295 	u32 wr_nondata;
296 	u32 hwtid;               /* TCP Control Block ID */
297 	u32 txq_idx;
298 	u32 rss_qid;
299 	u32 tid;
300 	u32 idr;
301 	u32 mss;
302 	u32 ulp_mode;
303 	u32 tx_chan;
304 	u32 rx_chan;
305 	u32 sndbuf;
306 	u32 txplen_max;
307 	u32 mtu_idx;           /* MTU table index */
308 	u32 smac_idx;
309 	u8 port_id;
310 	u8 tos;
311 	u16 resv2;
312 	u32 delack_mode;
313 	u32 delack_seq;
314 	u32 snd_win;
315 	u32 rcv_win;
316 
317 	void *passive_reap_next;        /* placeholder for passive */
318 	struct chtls_hws tlshws;
319 	struct synq {
320 		struct sk_buff *next;
321 		struct sk_buff *prev;
322 	} synq;
323 	struct listen_ctx *listen_ctx;
324 };
325 
326 struct tls_hdr {
327 	u8  type;
328 	u16 version;
329 	u16 length;
330 } __packed;
331 
332 struct tlsrx_cmp_hdr {
333 	u8  type;
334 	u16 version;
335 	u16 length;
336 
337 	u64 tls_seq;
338 	u16 reserved1;
339 	u8  res_to_mac_error;
340 } __packed;
341 
342 /* res_to_mac_error fields */
343 #define TLSRX_HDR_PKT_INT_ERROR_S   4
344 #define TLSRX_HDR_PKT_INT_ERROR_M   0x1
345 #define TLSRX_HDR_PKT_INT_ERROR_V(x) \
346 	((x) << TLSRX_HDR_PKT_INT_ERROR_S)
347 #define TLSRX_HDR_PKT_INT_ERROR_G(x) \
348 	(((x) >> TLSRX_HDR_PKT_INT_ERROR_S) & TLSRX_HDR_PKT_INT_ERROR_M)
349 #define TLSRX_HDR_PKT_INT_ERROR_F   TLSRX_HDR_PKT_INT_ERROR_V(1U)
350 
351 #define TLSRX_HDR_PKT_SPP_ERROR_S        3
352 #define TLSRX_HDR_PKT_SPP_ERROR_M        0x1
353 #define TLSRX_HDR_PKT_SPP_ERROR_V(x)     ((x) << TLSRX_HDR_PKT_SPP_ERROR)
354 #define TLSRX_HDR_PKT_SPP_ERROR_G(x)     \
355 	(((x) >> TLSRX_HDR_PKT_SPP_ERROR_S) & TLSRX_HDR_PKT_SPP_ERROR_M)
356 #define TLSRX_HDR_PKT_SPP_ERROR_F        TLSRX_HDR_PKT_SPP_ERROR_V(1U)
357 
358 #define TLSRX_HDR_PKT_CCDX_ERROR_S       2
359 #define TLSRX_HDR_PKT_CCDX_ERROR_M       0x1
360 #define TLSRX_HDR_PKT_CCDX_ERROR_V(x)    ((x) << TLSRX_HDR_PKT_CCDX_ERROR_S)
361 #define TLSRX_HDR_PKT_CCDX_ERROR_G(x)    \
362 	(((x) >> TLSRX_HDR_PKT_CCDX_ERROR_S) & TLSRX_HDR_PKT_CCDX_ERROR_M)
363 #define TLSRX_HDR_PKT_CCDX_ERROR_F       TLSRX_HDR_PKT_CCDX_ERROR_V(1U)
364 
365 #define TLSRX_HDR_PKT_PAD_ERROR_S        1
366 #define TLSRX_HDR_PKT_PAD_ERROR_M        0x1
367 #define TLSRX_HDR_PKT_PAD_ERROR_V(x)     ((x) << TLSRX_HDR_PKT_PAD_ERROR_S)
368 #define TLSRX_HDR_PKT_PAD_ERROR_G(x)     \
369 	(((x) >> TLSRX_HDR_PKT_PAD_ERROR_S) & TLSRX_HDR_PKT_PAD_ERROR_M)
370 #define TLSRX_HDR_PKT_PAD_ERROR_F        TLSRX_HDR_PKT_PAD_ERROR_V(1U)
371 
372 #define TLSRX_HDR_PKT_MAC_ERROR_S        0
373 #define TLSRX_HDR_PKT_MAC_ERROR_M        0x1
374 #define TLSRX_HDR_PKT_MAC_ERROR_V(x)     ((x) << TLSRX_HDR_PKT_MAC_ERROR)
375 #define TLSRX_HDR_PKT_MAC_ERROR_G(x)     \
376 	(((x) >> S_TLSRX_HDR_PKT_MAC_ERROR_S) & TLSRX_HDR_PKT_MAC_ERROR_M)
377 #define TLSRX_HDR_PKT_MAC_ERROR_F        TLSRX_HDR_PKT_MAC_ERROR_V(1U)
378 
379 #define TLSRX_HDR_PKT_ERROR_M           0x1F
380 #define CONTENT_TYPE_ERROR		0x7F
381 
382 struct ulp_mem_rw {
383 	__be32 cmd;
384 	__be32 len16;             /* command length */
385 	__be32 dlen;              /* data length in 32-byte units */
386 	__be32 lock_addr;
387 };
388 
389 struct tls_key_wr {
390 	__be32 op_to_compl;
391 	__be32 flowid_len16;
392 	__be32 ftid;
393 	u8   reneg_to_write_rx;
394 	u8   protocol;
395 	__be16 mfs;
396 };
397 
398 struct tls_key_req {
399 	struct tls_key_wr wr;
400 	struct ulp_mem_rw req;
401 	struct ulptx_idata sc_imm;
402 };
403 
404 /*
405  * This lives in skb->cb and is used to chain WRs in a linked list.
406  */
407 struct wr_skb_cb {
408 	struct l2t_skb_cb l2t;          /* reserve space for l2t CB */
409 	struct sk_buff *next_wr;        /* next write request */
410 };
411 
412 /* Per-skb backlog handler.  Run when a socket's backlog is processed. */
413 struct blog_skb_cb {
414 	void (*backlog_rcv)(struct sock *sk, struct sk_buff *skb);
415 	struct chtls_dev *cdev;
416 };
417 
418 /*
419  * Similar to tcp_skb_cb but with ULP elements added to support TLS,
420  * etc.
421  */
422 struct ulp_skb_cb {
423 	struct wr_skb_cb wr;		/* reserve space for write request */
424 	u16 flags;			/* TCP-like flags */
425 	u8 psh;
426 	u8 ulp_mode;			/* ULP mode/submode of sk_buff */
427 	u32 seq;			/* TCP sequence number */
428 	union { /* ULP-specific fields */
429 		struct {
430 			u8  type;
431 			u8  ofld;
432 			u8  iv;
433 		} tls;
434 	} ulp;
435 };
436 
437 #define ULP_SKB_CB(skb) ((struct ulp_skb_cb *)&((skb)->cb[0]))
438 #define BLOG_SKB_CB(skb) ((struct blog_skb_cb *)(skb)->cb)
439 
440 /*
441  * Flags for ulp_skb_cb.flags.
442  */
443 enum {
444 	ULPCB_FLAG_NEED_HDR  = 1 << 0,	/* packet needs a TX_DATA_WR header */
445 	ULPCB_FLAG_NO_APPEND = 1 << 1,	/* don't grow this skb */
446 	ULPCB_FLAG_BARRIER   = 1 << 2,	/* set TX_WAIT_IDLE after sending */
447 	ULPCB_FLAG_HOLD      = 1 << 3,	/* skb not ready for Tx yet */
448 	ULPCB_FLAG_COMPL     = 1 << 4,	/* request WR completion */
449 	ULPCB_FLAG_URG       = 1 << 5,	/* urgent data */
450 	ULPCB_FLAG_TLS_HDR   = 1 << 6,  /* payload with tls hdr */
451 	ULPCB_FLAG_NO_HDR    = 1 << 7,  /* not a ofld wr */
452 };
453 
454 /* The ULP mode/submode of an skbuff */
455 #define skb_ulp_mode(skb)  (ULP_SKB_CB(skb)->ulp_mode)
456 #define TCP_PAGE(sk)   (sk->sk_frag.page)
457 #define TCP_OFF(sk)    (sk->sk_frag.offset)
458 
459 static inline struct chtls_dev *to_chtls_dev(struct tls_toe_device *tlsdev)
460 {
461 	return container_of(tlsdev, struct chtls_dev, tlsdev);
462 }
463 
464 static inline void csk_set_flag(struct chtls_sock *csk,
465 				enum csk_flags flag)
466 {
467 	__set_bit(flag, &csk->flags);
468 }
469 
470 static inline void csk_reset_flag(struct chtls_sock *csk,
471 				  enum csk_flags flag)
472 {
473 	__clear_bit(flag, &csk->flags);
474 }
475 
476 static inline bool csk_conn_inline(const struct chtls_sock *csk)
477 {
478 	return test_bit(CSK_CONN_INLINE, &csk->flags);
479 }
480 
481 static inline int csk_flag(const struct sock *sk, enum csk_flags flag)
482 {
483 	struct chtls_sock *csk = rcu_dereference_sk_user_data(sk);
484 
485 	if (!csk_conn_inline(csk))
486 		return 0;
487 	return test_bit(flag, &csk->flags);
488 }
489 
490 static inline int csk_flag_nochk(const struct chtls_sock *csk,
491 				 enum csk_flags flag)
492 {
493 	return test_bit(flag, &csk->flags);
494 }
495 
496 static inline void *cplhdr(struct sk_buff *skb)
497 {
498 	return skb->data;
499 }
500 
501 static inline int is_neg_adv(unsigned int status)
502 {
503 	return status == CPL_ERR_RTX_NEG_ADVICE ||
504 	       status == CPL_ERR_KEEPALV_NEG_ADVICE ||
505 	       status == CPL_ERR_PERSIST_NEG_ADVICE;
506 }
507 
508 static inline void process_cpl_msg(void (*fn)(struct sock *, struct sk_buff *),
509 				   struct sock *sk,
510 				   struct sk_buff *skb)
511 {
512 	skb_reset_mac_header(skb);
513 	skb_reset_network_header(skb);
514 	skb_reset_transport_header(skb);
515 
516 	bh_lock_sock(sk);
517 	if (unlikely(sock_owned_by_user(sk))) {
518 		BLOG_SKB_CB(skb)->backlog_rcv = fn;
519 		__sk_add_backlog(sk, skb);
520 	} else {
521 		fn(sk, skb);
522 	}
523 	bh_unlock_sock(sk);
524 }
525 
526 static inline void chtls_sock_free(struct kref *ref)
527 {
528 	struct chtls_sock *csk = container_of(ref, struct chtls_sock,
529 					      kref);
530 	kfree(csk);
531 }
532 
533 static inline void __chtls_sock_put(const char *fn, struct chtls_sock *csk)
534 {
535 	kref_put(&csk->kref, chtls_sock_free);
536 }
537 
538 static inline void __chtls_sock_get(const char *fn,
539 				    struct chtls_sock *csk)
540 {
541 	kref_get(&csk->kref);
542 }
543 
544 static inline void send_or_defer(struct sock *sk, struct tcp_sock *tp,
545 				 struct sk_buff *skb, int through_l2t)
546 {
547 	struct chtls_sock *csk = rcu_dereference_sk_user_data(sk);
548 
549 	if (through_l2t) {
550 		/* send through L2T */
551 		cxgb4_l2t_send(csk->egress_dev, skb, csk->l2t_entry);
552 	} else {
553 		/* send directly */
554 		cxgb4_ofld_send(csk->egress_dev, skb);
555 	}
556 }
557 
558 typedef int (*chtls_handler_func)(struct chtls_dev *, struct sk_buff *);
559 extern chtls_handler_func chtls_handlers[NUM_CPL_CMDS];
560 void chtls_install_cpl_ops(struct sock *sk);
561 int chtls_init_kmap(struct chtls_dev *cdev, struct cxgb4_lld_info *lldi);
562 void chtls_listen_stop(struct chtls_dev *cdev, struct sock *sk);
563 int chtls_listen_start(struct chtls_dev *cdev, struct sock *sk);
564 void chtls_close(struct sock *sk, long timeout);
565 int chtls_disconnect(struct sock *sk, int flags);
566 void chtls_shutdown(struct sock *sk, int how);
567 void chtls_destroy_sock(struct sock *sk);
568 int chtls_sendmsg(struct sock *sk, struct msghdr *msg, size_t size);
569 int chtls_recvmsg(struct sock *sk, struct msghdr *msg,
570 		  size_t len, int nonblock, int flags, int *addr_len);
571 int chtls_sendpage(struct sock *sk, struct page *page,
572 		   int offset, size_t size, int flags);
573 int send_tx_flowc_wr(struct sock *sk, int compl,
574 		     u32 snd_nxt, u32 rcv_nxt);
575 void chtls_tcp_push(struct sock *sk, int flags);
576 int chtls_push_frames(struct chtls_sock *csk, int comp);
577 int chtls_set_tcb_tflag(struct sock *sk, unsigned int bit_pos, int val);
578 void chtls_set_tcb_field_rpl_skb(struct sock *sk, u16 word,
579 				 u64 mask, u64 val, u8 cookie,
580 				 int through_l2t);
581 int chtls_setkey(struct chtls_sock *csk, u32 keylen, u32 mode, int cipher_type);
582 void chtls_set_quiesce_ctrl(struct sock *sk, int val);
583 void skb_entail(struct sock *sk, struct sk_buff *skb, int flags);
584 unsigned int keyid_to_addr(int start_addr, int keyid);
585 void free_tls_keyid(struct sock *sk);
586 #endif
587