112 lines · c
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 410#define CHCR_KEYCTX_MAC_KEY_SIZE_128 011#define CHCR_KEYCTX_CIPHER_KEY_SIZE_128 012#define CHCR_SCMD_CIPHER_MODE_AES_GCM 213#define CHCR_SCMD_CIPHER_MODE_AES_CTR 314#define CHCR_CPL_TX_SEC_PDU_LEN_64BIT 215#define CHCR_SCMD_SEQ_NO_CTRL_64BIT 316#define CHCR_SCMD_PROTO_VERSION_TLS 017#define CHCR_SCMD_PROTO_VERSION_GENERIC 418#define CHCR_SCMD_AUTH_MODE_GHASH 419#define AES_BLOCK_LEN 1620 21struct 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 2431#define KEY_CONTEXT_CTX_LEN_V(x) ((x) << KEY_CONTEXT_CTX_LEN_S)32 33#define KEY_CONTEXT_SALT_PRESENT_S 1034#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 038#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 642#define KEY_CONTEXT_CK_SIZE_V(x) ((x) << KEY_CONTEXT_CK_SIZE_S)43 44#define KEY_CONTEXT_MK_SIZE_S 245#define KEY_CONTEXT_MK_SIZE_V(x) ((x) << KEY_CONTEXT_MK_SIZE_S)46 47#define KEY_CONTEXT_OPAD_PRESENT_S 1148#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 58static 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 81static inline unsigned int chcr_txq_avail(const struct sge_txq *q)82{83 return q->size - 1 - q->in_use;84}85 86static 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 94static 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 100static inline unsigned int chcr_sgl_len(unsigned int n)101{102 n--;103 return (3 * n) / 2 + (n & 1) + 2;104}105 106static 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