chcr_common.h

  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
 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           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
 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__ */