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 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 81 static inline unsigned int chcr_txq_avail(const struct sge_txq *q) 82 { 83 return q->size - 1 - q->in_use; 84 } 85 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 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 } 99 100 static inline unsigned int chcr_sgl_len(unsigned int n) 101 { 102 n--; 103 return (3 * n) / 2 + (n & 1) + 2; 104 } 105 106 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