1 /* SPDX-License-Identifier: GPL-2.0-only */
2 /* Copyright (C) 2020 Chelsio Communications. All rights reserved. */
3
4 #ifndef __CHCR_COMMON_H__
5 #define __CHCR_COMMON_H__
6
7 #include "cxgb4.h"
8
9 #define CHCR_MAX_SALT 4
10 #define CHCR_KEYCTX_MAC_KEY_SIZE_128 0
11 #define CHCR_KEYCTX_CIPHER_KEY_SIZE_128 0
12 #define CHCR_SCMD_CIPHER_MODE_AES_GCM 2
13 #define CHCR_SCMD_CIPHER_MODE_AES_CTR 3
14 #define CHCR_CPL_TX_SEC_PDU_LEN_64BIT 2
15 #define CHCR_SCMD_SEQ_NO_CTRL_64BIT 3
16 #define CHCR_SCMD_PROTO_VERSION_TLS 0
17 #define CHCR_SCMD_PROTO_VERSION_GENERIC 4
18 #define CHCR_SCMD_AUTH_MODE_GHASH 4
19 #define AES_BLOCK_LEN 16
20
21 struct ktls_key_ctx {
22 __be32 ctx_hdr;
23 u8 salt[CHCR_MAX_SALT];
24 __be64 iv_to_auth;
25 unsigned char key[TLS_CIPHER_AES_GCM_128_KEY_SIZE +
26 TLS_CIPHER_AES_GCM_256_TAG_SIZE];
27 };
28
29 /* Crypto key context */
30 #define KEY_CONTEXT_CTX_LEN_S 24
31 #define KEY_CONTEXT_CTX_LEN_V(x) ((x) << KEY_CONTEXT_CTX_LEN_S)
32
33 #define KEY_CONTEXT_SALT_PRESENT_S 10
34 #define KEY_CONTEXT_SALT_PRESENT_V(x) ((x) << KEY_CONTEXT_SALT_PRESENT_S)
35 #define KEY_CONTEXT_SALT_PRESENT_F KEY_CONTEXT_SALT_PRESENT_V(1U)
36
37 #define KEY_CONTEXT_VALID_S 0
38 #define KEY_CONTEXT_VALID_V(x) ((x) << KEY_CONTEXT_VALID_S)
39 #define KEY_CONTEXT_VALID_F KEY_CONTEXT_VALID_V(1U)
40
41 #define KEY_CONTEXT_CK_SIZE_S 6
42 #define KEY_CONTEXT_CK_SIZE_V(x) ((x) << KEY_CONTEXT_CK_SIZE_S)
43
44 #define KEY_CONTEXT_MK_SIZE_S 2
45 #define KEY_CONTEXT_MK_SIZE_V(x) ((x) << KEY_CONTEXT_MK_SIZE_S)
46
47 #define KEY_CONTEXT_OPAD_PRESENT_S 11
48 #define KEY_CONTEXT_OPAD_PRESENT_V(x) ((x) << KEY_CONTEXT_OPAD_PRESENT_S)
49 #define KEY_CONTEXT_OPAD_PRESENT_F KEY_CONTEXT_OPAD_PRESENT_V(1U)
50
51 #define FILL_KEY_CTX_HDR(ck_size, mk_size, ctx_len) \
52 htonl(KEY_CONTEXT_MK_SIZE_V(mk_size) | \
53 KEY_CONTEXT_CK_SIZE_V(ck_size) | \
54 KEY_CONTEXT_VALID_F | \
55 KEY_CONTEXT_SALT_PRESENT_F | \
56 KEY_CONTEXT_CTX_LEN_V((ctx_len)))
57
chcr_copy_to_txd(const void * src,const struct sge_txq * q,void * pos,int length)58 static inline void *chcr_copy_to_txd(const void *src, const struct sge_txq *q,
59 void *pos, int length)
60 {
61 int left = (void *)q->stat - pos;
62 u64 *p;
63
64 if (likely(length <= left)) {
65 memcpy(pos, src, length);
66 pos += length;
67 } else {
68 memcpy(pos, src, left);
69 memcpy(q->desc, src + left, length - left);
70 pos = (void *)q->desc + (length - left);
71 }
72 /* 0-pad to multiple of 16 */
73 p = PTR_ALIGN(pos, 8);
74 if ((uintptr_t)p & 8) {
75 *p = 0;
76 return p + 1;
77 }
78 return p;
79 }
80
chcr_txq_avail(const struct sge_txq * q)81 static inline unsigned int chcr_txq_avail(const struct sge_txq *q)
82 {
83 return q->size - 1 - q->in_use;
84 }
85
chcr_txq_advance(struct sge_txq * q,unsigned int n)86 static inline void chcr_txq_advance(struct sge_txq *q, unsigned int n)
87 {
88 q->in_use += n;
89 q->pidx += n;
90 if (q->pidx >= q->size)
91 q->pidx -= q->size;
92 }
93
chcr_eth_txq_stop(struct sge_eth_txq * q)94 static inline void chcr_eth_txq_stop(struct sge_eth_txq *q)
95 {
96 netif_tx_stop_queue(q->txq);
97 q->q.stops++;
98 }
99
chcr_sgl_len(unsigned int n)100 static inline unsigned int chcr_sgl_len(unsigned int n)
101 {
102 n--;
103 return (3 * n) / 2 + (n & 1) + 2;
104 }
105
chcr_flits_to_desc(unsigned int n)106 static inline unsigned int chcr_flits_to_desc(unsigned int n)
107 {
108 WARN_ON(n > SGE_MAX_WR_LEN / 8);
109 return DIV_ROUND_UP(n, 8);
110 }
111 #endif /* __CHCR_COMMON_H__ */
112