1 /* SPDX-License-Identifier: GPL-2.0-only */
2 /* Copyright (C) 2020 Chelsio Communications.  All rights reserved. */
3 
4 #ifndef __CHCR_KTLS_H__
5 #define __CHCR_KTLS_H__
6 
7 #include "cxgb4.h"
8 #include "t4_msg.h"
9 #include "t4_tcb.h"
10 #include "l2t.h"
11 #include "chcr_common.h"
12 #include "cxgb4_uld.h"
13 #include "clip_tbl.h"
14 
15 #define CHCR_KTLS_DRV_MODULE_NAME "ch_ktls"
16 #define CHCR_KTLS_DRV_VERSION "1.0.0.0-ko"
17 #define CHCR_KTLS_DRV_DESC "Chelsio NIC TLS ULD Driver"
18 
19 #define CHCR_TCB_STATE_CLOSED	0
20 #define CHCR_KTLS_KEY_CTX_LEN	16
21 #define CHCR_SET_TCB_FIELD_LEN	sizeof(struct cpl_set_tcb_field)
22 #define CHCR_PLAIN_TX_DATA_LEN	(sizeof(struct fw_ulptx_wr) +\
23 				 sizeof(struct ulp_txpkt) +\
24 				 sizeof(struct ulptx_idata) +\
25 				 sizeof(struct cpl_tx_data))
26 
27 #define CHCR_KTLS_WR_SIZE	(CHCR_PLAIN_TX_DATA_LEN +\
28 				 sizeof(struct cpl_tx_sec_pdu))
29 #define FALLBACK		35
30 
31 enum ch_ktls_open_state {
32 	CH_KTLS_OPEN_SUCCESS = 0,
33 	CH_KTLS_OPEN_PENDING = 1,
34 	CH_KTLS_OPEN_FAILURE = 2,
35 };
36 
37 struct chcr_ktls_info {
38 	struct sock *sk;
39 	spinlock_t lock; /* lock for pending_close */
40 	struct ktls_key_ctx key_ctx;
41 	struct adapter *adap;
42 	struct l2t_entry *l2te;
43 	struct net_device *netdev;
44 	struct completion completion;
45 	u64 iv;
46 	u64 record_no;
47 	int tid;
48 	int atid;
49 	int rx_qid;
50 	u32 iv_size;
51 	u32 prev_seq;
52 	u32 prev_ack;
53 	u32 salt_size;
54 	u32 key_ctx_len;
55 	u32 scmd0_seqno_numivs;
56 	u32 scmd0_ivgen_hdrlen;
57 	u32 tcp_start_seq_number;
58 	u32 scmd0_short_seqno_numivs;
59 	u32 scmd0_short_ivgen_hdrlen;
60 	u16 prev_win;
61 	u8 tx_chan;
62 	u8 smt_idx;
63 	u8 port_id;
64 	u8 ip_family;
65 	u8 first_qset;
66 	enum ch_ktls_open_state open_state;
67 	bool pending_close;
68 };
69 
70 struct chcr_ktls_ctx_tx {
71 	struct chcr_ktls_info *chcr_info;
72 };
73 
74 struct chcr_ktls_uld_ctx {
75 	struct list_head entry;
76 	struct cxgb4_lld_info lldi;
77 	struct xarray tid_list;
78 	bool detach;
79 };
80 
81 static inline struct chcr_ktls_info *
__chcr_get_ktls_tx_info(struct tls_offload_context_tx * octx)82 __chcr_get_ktls_tx_info(struct tls_offload_context_tx *octx)
83 {
84 	struct chcr_ktls_ctx_tx *priv_ctx;
85 
86 	BUILD_BUG_ON(sizeof(struct chcr_ktls_ctx_tx) > TLS_DRIVER_STATE_SIZE_TX);
87 	priv_ctx = (struct chcr_ktls_ctx_tx *)octx->driver_state;
88 	return priv_ctx->chcr_info;
89 }
90 
91 static inline struct chcr_ktls_info *
chcr_get_ktls_tx_info(struct tls_context * tls_ctx)92 chcr_get_ktls_tx_info(struct tls_context *tls_ctx)
93 {
94 	struct chcr_ktls_ctx_tx *priv_ctx;
95 
96 	BUILD_BUG_ON(sizeof(struct chcr_ktls_ctx_tx) > TLS_DRIVER_STATE_SIZE_TX);
97 	priv_ctx = (struct chcr_ktls_ctx_tx *)__tls_driver_ctx(tls_ctx, TLS_OFFLOAD_CTX_DIR_TX);
98 	return priv_ctx->chcr_info;
99 }
100 
101 static inline void
chcr_set_ktls_tx_info(struct tls_context * tls_ctx,struct chcr_ktls_info * chcr_info)102 chcr_set_ktls_tx_info(struct tls_context *tls_ctx, struct chcr_ktls_info *chcr_info)
103 {
104 	struct chcr_ktls_ctx_tx *priv_ctx;
105 
106 	priv_ctx = __tls_driver_ctx(tls_ctx, TLS_OFFLOAD_CTX_DIR_TX);
107 	priv_ctx->chcr_info = chcr_info;
108 }
109 
chcr_get_first_rx_qid(struct adapter * adap)110 static inline int chcr_get_first_rx_qid(struct adapter *adap)
111 {
112 	/* u_ctx is saved in adap, fetch it */
113 	struct chcr_ktls_uld_ctx *u_ctx = adap->uld[CXGB4_ULD_KTLS].handle;
114 
115 	if (!u_ctx)
116 		return -1;
117 	return u_ctx->lldi.rxq_ids[0];
118 }
119 
120 typedef int (*chcr_handler_func)(struct adapter *adap, unsigned char *input);
121 #endif /* __CHCR_KTLS_H__ */
122