1 /* SPDX-License-Identifier: GPL-2.0-only */
2 /*
3 * Copyright (c) 2018 Chelsio Communications, Inc.
4 */
5
6 #ifndef __CHTLS_CM_H__
7 #define __CHTLS_CM_H__
8
9 /*
10 * TCB settings
11 */
12 /* 3:0 */
13 #define TCB_ULP_TYPE_W 0
14 #define TCB_ULP_TYPE_S 0
15 #define TCB_ULP_TYPE_M 0xfULL
16 #define TCB_ULP_TYPE_V(x) ((x) << TCB_ULP_TYPE_S)
17
18 /* 11:4 */
19 #define TCB_ULP_RAW_W 0
20 #define TCB_ULP_RAW_S 4
21 #define TCB_ULP_RAW_M 0xffULL
22 #define TCB_ULP_RAW_V(x) ((x) << TCB_ULP_RAW_S)
23
24 #define TF_TLS_KEY_SIZE_S 7
25 #define TF_TLS_KEY_SIZE_V(x) ((x) << TF_TLS_KEY_SIZE_S)
26
27 #define TF_TLS_CONTROL_S 2
28 #define TF_TLS_CONTROL_V(x) ((x) << TF_TLS_CONTROL_S)
29
30 #define TF_TLS_ACTIVE_S 1
31 #define TF_TLS_ACTIVE_V(x) ((x) << TF_TLS_ACTIVE_S)
32
33 #define TF_TLS_ENABLE_S 0
34 #define TF_TLS_ENABLE_V(x) ((x) << TF_TLS_ENABLE_S)
35
36 #define TF_RX_QUIESCE_S 15
37 #define TF_RX_QUIESCE_V(x) ((x) << TF_RX_QUIESCE_S)
38
39 /*
40 * Max receive window supported by HW in bytes. Only a small part of it can
41 * be set through option0, the rest needs to be set through RX_DATA_ACK.
42 */
43 #define MAX_RCV_WND ((1U << 27) - 1)
44 #define MAX_MSS 65536
45
46 /*
47 * Min receive window. We want it to be large enough to accommodate receive
48 * coalescing, handle jumbo frames, and not trigger sender SWS avoidance.
49 */
50 #define MIN_RCV_WND (24 * 1024U)
51 #define LOOPBACK(x) (((x) & htonl(0xff000000)) == htonl(0x7f000000))
52
53 /* for TX: a skb must have a headroom of at least TX_HEADER_LEN bytes */
54 #define TX_HEADER_LEN \
55 (sizeof(struct fw_ofld_tx_data_wr) + sizeof(struct sge_opaque_hdr))
56 #define TX_TLSHDR_LEN \
57 (sizeof(struct fw_tlstx_data_wr) + sizeof(struct cpl_tx_tls_sfo) + \
58 sizeof(struct sge_opaque_hdr))
59 #define TXDATA_SKB_LEN 128
60
61 enum {
62 CPL_TX_TLS_SFO_TYPE_CCS,
63 CPL_TX_TLS_SFO_TYPE_ALERT,
64 CPL_TX_TLS_SFO_TYPE_HANDSHAKE,
65 CPL_TX_TLS_SFO_TYPE_DATA,
66 CPL_TX_TLS_SFO_TYPE_HEARTBEAT,
67 };
68
69 enum {
70 TLS_HDR_TYPE_CCS = 20,
71 TLS_HDR_TYPE_ALERT,
72 TLS_HDR_TYPE_HANDSHAKE,
73 TLS_HDR_TYPE_RECORD,
74 TLS_HDR_TYPE_HEARTBEAT,
75 };
76
77 typedef void (*defer_handler_t)(struct chtls_dev *dev, struct sk_buff *skb);
78 extern struct request_sock_ops chtls_rsk_ops;
79 extern struct request_sock_ops chtls_rsk_opsv6;
80
81 struct deferred_skb_cb {
82 defer_handler_t handler;
83 struct chtls_dev *dev;
84 };
85
86 #define DEFERRED_SKB_CB(skb) ((struct deferred_skb_cb *)(skb)->cb)
87 #define failover_flowc_wr_len offsetof(struct fw_flowc_wr, mnemval[3])
88 #define WR_SKB_CB(skb) ((struct wr_skb_cb *)(skb)->cb)
89 #define ACCEPT_QUEUE(sk) (&inet_csk(sk)->icsk_accept_queue.rskq_accept_head)
90
91 #define SND_WSCALE(tp) ((tp)->rx_opt.snd_wscale)
92 #define RCV_WSCALE(tp) ((tp)->rx_opt.rcv_wscale)
93 #define USER_MSS(tp) (READ_ONCE((tp)->rx_opt.user_mss))
94 #define TS_RECENT_STAMP(tp) ((tp)->rx_opt.ts_recent_stamp)
95 #define WSCALE_OK(tp) ((tp)->rx_opt.wscale_ok)
96 #define TSTAMP_OK(tp) ((tp)->rx_opt.tstamp_ok)
97 #define SACK_OK(tp) ((tp)->rx_opt.sack_ok)
98
99 /* TLS SKB */
100 #define skb_ulp_tls_inline(skb) (ULP_SKB_CB(skb)->ulp.tls.ofld)
101 #define skb_ulp_tls_iv_imm(skb) (ULP_SKB_CB(skb)->ulp.tls.iv)
102
103 void chtls_defer_reply(struct sk_buff *skb, struct chtls_dev *dev,
104 defer_handler_t handler);
105
106 /*
107 * Returns true if the socket is in one of the supplied states.
108 */
sk_in_state(const struct sock * sk,unsigned int states)109 static inline unsigned int sk_in_state(const struct sock *sk,
110 unsigned int states)
111 {
112 return states & (1 << sk->sk_state);
113 }
114
chtls_rsk_destructor(struct request_sock * req)115 static void chtls_rsk_destructor(struct request_sock *req)
116 {
117 /* do nothing */
118 }
119
chtls_init_rsk_ops(struct proto * chtls_tcp_prot,struct request_sock_ops * chtls_tcp_ops,struct proto * tcp_prot,int family)120 static inline void chtls_init_rsk_ops(struct proto *chtls_tcp_prot,
121 struct request_sock_ops *chtls_tcp_ops,
122 struct proto *tcp_prot, int family)
123 {
124 memset(chtls_tcp_ops, 0, sizeof(*chtls_tcp_ops));
125 chtls_tcp_ops->family = family;
126 chtls_tcp_ops->obj_size = sizeof(struct tcp_request_sock);
127 chtls_tcp_ops->destructor = chtls_rsk_destructor;
128 chtls_tcp_ops->slab = tcp_prot->rsk_prot->slab;
129 chtls_tcp_prot->rsk_prot = chtls_tcp_ops;
130 }
131
chtls_reqsk_free(struct request_sock * req)132 static inline void chtls_reqsk_free(struct request_sock *req)
133 {
134 if (req->rsk_listener)
135 sock_put(req->rsk_listener);
136 kmem_cache_free(req->rsk_ops->slab, req);
137 }
138
139 #define DECLARE_TASK_FUNC(task, task_param) \
140 static void task(struct work_struct *task_param)
141
sk_wakeup_sleepers(struct sock * sk,bool interruptable)142 static inline void sk_wakeup_sleepers(struct sock *sk, bool interruptable)
143 {
144 struct socket_wq *wq;
145
146 rcu_read_lock();
147 wq = rcu_dereference(sk->sk_wq);
148 if (skwq_has_sleeper(wq)) {
149 if (interruptable)
150 wake_up_interruptible(sk_sleep(sk));
151 else
152 wake_up_all(sk_sleep(sk));
153 }
154 rcu_read_unlock();
155 }
156
chtls_set_req_port(struct request_sock * oreq,__be16 source,__be16 dest)157 static inline void chtls_set_req_port(struct request_sock *oreq,
158 __be16 source, __be16 dest)
159 {
160 inet_rsk(oreq)->ir_rmt_port = source;
161 inet_rsk(oreq)->ir_num = ntohs(dest);
162 }
163
chtls_set_req_addr(struct request_sock * oreq,__be32 local_ip,__be32 peer_ip)164 static inline void chtls_set_req_addr(struct request_sock *oreq,
165 __be32 local_ip, __be32 peer_ip)
166 {
167 inet_rsk(oreq)->ir_loc_addr = local_ip;
168 inet_rsk(oreq)->ir_rmt_addr = peer_ip;
169 }
170
chtls_free_skb(struct sock * sk,struct sk_buff * skb)171 static inline void chtls_free_skb(struct sock *sk, struct sk_buff *skb)
172 {
173 skb_dstref_steal(skb);
174 __skb_unlink(skb, &sk->sk_receive_queue);
175 __kfree_skb(skb);
176 }
177
chtls_kfree_skb(struct sock * sk,struct sk_buff * skb)178 static inline void chtls_kfree_skb(struct sock *sk, struct sk_buff *skb)
179 {
180 skb_dstref_steal(skb);
181 __skb_unlink(skb, &sk->sk_receive_queue);
182 kfree_skb(skb);
183 }
184
chtls_reset_wr_list(struct chtls_sock * csk)185 static inline void chtls_reset_wr_list(struct chtls_sock *csk)
186 {
187 csk->wr_skb_head = NULL;
188 csk->wr_skb_tail = NULL;
189 }
190
enqueue_wr(struct chtls_sock * csk,struct sk_buff * skb)191 static inline void enqueue_wr(struct chtls_sock *csk, struct sk_buff *skb)
192 {
193 WR_SKB_CB(skb)->next_wr = NULL;
194
195 skb_get(skb);
196
197 if (!csk->wr_skb_head)
198 csk->wr_skb_head = skb;
199 else
200 WR_SKB_CB(csk->wr_skb_tail)->next_wr = skb;
201 csk->wr_skb_tail = skb;
202 }
203
dequeue_wr(struct sock * sk)204 static inline struct sk_buff *dequeue_wr(struct sock *sk)
205 {
206 struct chtls_sock *csk = rcu_dereference_sk_user_data(sk);
207 struct sk_buff *skb = NULL;
208
209 skb = csk->wr_skb_head;
210
211 if (likely(skb)) {
212 /* Don't bother clearing the tail */
213 csk->wr_skb_head = WR_SKB_CB(skb)->next_wr;
214 WR_SKB_CB(skb)->next_wr = NULL;
215 }
216 return skb;
217 }
218 #endif
219