1 /* 2 * This file is part of the Chelsio T6 Crypto driver for Linux. 3 * 4 * Copyright (c) 2003-2016 Chelsio Communications, Inc. All rights reserved. 5 * 6 * This software is available to you under a choice of one of two 7 * licenses. You may choose to be licensed under the terms of the GNU 8 * General Public License (GPL) Version 2, available from the file 9 * COPYING in the main directory of this source tree, or the 10 * OpenIB.org BSD license below: 11 * 12 * Redistribution and use in source and binary forms, with or 13 * without modification, are permitted provided that the following 14 * conditions are met: 15 * 16 * - Redistributions of source code must retain the above 17 * copyright notice, this list of conditions and the following 18 * disclaimer. 19 * 20 * - Redistributions in binary form must reproduce the above 21 * copyright notice, this list of conditions and the following 22 * disclaimer in the documentation and/or other materials 23 * provided with the distribution. 24 * 25 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 26 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 27 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 28 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS 29 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN 30 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN 31 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE 32 * SOFTWARE. 33 * 34 */ 35 36 #ifndef __CHCR_CORE_H__ 37 #define __CHCR_CORE_H__ 38 39 #include <crypto/algapi.h> 40 #include "t4_hw.h" 41 #include "cxgb4.h" 42 #include "t4_msg.h" 43 #include "cxgb4_uld.h" 44 45 #define DRV_MODULE_NAME "chcr" 46 #define DRV_VERSION "1.0.0.0" 47 48 #define MAX_PENDING_REQ_TO_HW 20 49 #define CHCR_TEST_RESPONSE_TIMEOUT 1000 50 #define WQ_DETACH_TM (msecs_to_jiffies(50)) 51 #define PAD_ERROR_BIT 1 52 #define CHK_PAD_ERR_BIT(x) (((x) >> PAD_ERROR_BIT) & 1) 53 54 #define MAC_ERROR_BIT 0 55 #define CHK_MAC_ERR_BIT(x) (((x) >> MAC_ERROR_BIT) & 1) 56 #define MAX_SALT 4 57 #define CIP_WR_MIN_LEN (sizeof(struct chcr_wr) + \ 58 sizeof(struct cpl_rx_phys_dsgl) + \ 59 sizeof(struct ulptx_sgl) + 16) //IV 60 61 #define HASH_WR_MIN_LEN (sizeof(struct chcr_wr) + \ 62 DUMMY_BYTES + \ 63 sizeof(struct ulptx_sgl)) 64 struct uld_ctx; 65 66 struct _key_ctx { 67 __be32 ctx_hdr; 68 u8 salt[MAX_SALT]; 69 __be64 iv_to_auth; 70 unsigned char key[0]; 71 }; 72 73 #define KEYCTX_TX_WR_IV_S 55 74 #define KEYCTX_TX_WR_IV_M 0x1ffULL 75 #define KEYCTX_TX_WR_IV_V(x) ((x) << KEYCTX_TX_WR_IV_S) 76 #define KEYCTX_TX_WR_IV_G(x) \ 77 (((x) >> KEYCTX_TX_WR_IV_S) & KEYCTX_TX_WR_IV_M) 78 79 #define KEYCTX_TX_WR_AAD_S 47 80 #define KEYCTX_TX_WR_AAD_M 0xffULL 81 #define KEYCTX_TX_WR_AAD_V(x) ((x) << KEYCTX_TX_WR_AAD_S) 82 #define KEYCTX_TX_WR_AAD_G(x) (((x) >> KEYCTX_TX_WR_AAD_S) & \ 83 KEYCTX_TX_WR_AAD_M) 84 85 #define KEYCTX_TX_WR_AADST_S 39 86 #define KEYCTX_TX_WR_AADST_M 0xffULL 87 #define KEYCTX_TX_WR_AADST_V(x) ((x) << KEYCTX_TX_WR_AADST_S) 88 #define KEYCTX_TX_WR_AADST_G(x) \ 89 (((x) >> KEYCTX_TX_WR_AADST_S) & KEYCTX_TX_WR_AADST_M) 90 91 #define KEYCTX_TX_WR_CIPHER_S 30 92 #define KEYCTX_TX_WR_CIPHER_M 0x1ffULL 93 #define KEYCTX_TX_WR_CIPHER_V(x) ((x) << KEYCTX_TX_WR_CIPHER_S) 94 #define KEYCTX_TX_WR_CIPHER_G(x) \ 95 (((x) >> KEYCTX_TX_WR_CIPHER_S) & KEYCTX_TX_WR_CIPHER_M) 96 97 #define KEYCTX_TX_WR_CIPHERST_S 23 98 #define KEYCTX_TX_WR_CIPHERST_M 0x7f 99 #define KEYCTX_TX_WR_CIPHERST_V(x) ((x) << KEYCTX_TX_WR_CIPHERST_S) 100 #define KEYCTX_TX_WR_CIPHERST_G(x) \ 101 (((x) >> KEYCTX_TX_WR_CIPHERST_S) & KEYCTX_TX_WR_CIPHERST_M) 102 103 #define KEYCTX_TX_WR_AUTH_S 14 104 #define KEYCTX_TX_WR_AUTH_M 0x1ff 105 #define KEYCTX_TX_WR_AUTH_V(x) ((x) << KEYCTX_TX_WR_AUTH_S) 106 #define KEYCTX_TX_WR_AUTH_G(x) \ 107 (((x) >> KEYCTX_TX_WR_AUTH_S) & KEYCTX_TX_WR_AUTH_M) 108 109 #define KEYCTX_TX_WR_AUTHST_S 7 110 #define KEYCTX_TX_WR_AUTHST_M 0x7f 111 #define KEYCTX_TX_WR_AUTHST_V(x) ((x) << KEYCTX_TX_WR_AUTHST_S) 112 #define KEYCTX_TX_WR_AUTHST_G(x) \ 113 (((x) >> KEYCTX_TX_WR_AUTHST_S) & KEYCTX_TX_WR_AUTHST_M) 114 115 #define KEYCTX_TX_WR_AUTHIN_S 0 116 #define KEYCTX_TX_WR_AUTHIN_M 0x7f 117 #define KEYCTX_TX_WR_AUTHIN_V(x) ((x) << KEYCTX_TX_WR_AUTHIN_S) 118 #define KEYCTX_TX_WR_AUTHIN_G(x) \ 119 (((x) >> KEYCTX_TX_WR_AUTHIN_S) & KEYCTX_TX_WR_AUTHIN_M) 120 121 #define WQ_RETRY 5 122 struct chcr_driver_data { 123 struct list_head act_dev; 124 struct list_head inact_dev; 125 atomic_t dev_count; 126 struct mutex drv_mutex; 127 struct uld_ctx *last_dev; 128 }; 129 130 enum chcr_state { 131 CHCR_INIT = 0, 132 CHCR_ATTACH, 133 CHCR_DETACH, 134 }; 135 struct chcr_wr { 136 struct fw_crypto_lookaside_wr wreq; 137 struct ulp_txpkt ulptx; 138 struct ulptx_idata sc_imm; 139 struct cpl_tx_sec_pdu sec_cpl; 140 struct _key_ctx key_ctx; 141 }; 142 143 struct chcr_dev { 144 spinlock_t lock_chcr_dev; 145 enum chcr_state state; 146 atomic_t inflight; 147 int wqretry; 148 struct delayed_work detach_work; 149 struct completion detach_comp; 150 unsigned char tx_channel_id; 151 }; 152 153 struct uld_ctx { 154 struct list_head entry; 155 struct cxgb4_lld_info lldi; 156 struct chcr_dev dev; 157 }; 158 159 struct sge_opaque_hdr { 160 void *dev; 161 dma_addr_t addr[MAX_SKB_FRAGS + 1]; 162 }; 163 164 struct chcr_ipsec_req { 165 struct ulp_txpkt ulptx; 166 struct ulptx_idata sc_imm; 167 struct cpl_tx_sec_pdu sec_cpl; 168 struct _key_ctx key_ctx; 169 }; 170 171 struct chcr_ipsec_wr { 172 struct fw_ulptx_wr wreq; 173 struct chcr_ipsec_req req; 174 }; 175 176 #define ESN_IV_INSERT_OFFSET 12 177 struct chcr_ipsec_aadiv { 178 __be32 spi; 179 u8 seq_no[8]; 180 u8 iv[8]; 181 }; 182 183 struct ipsec_sa_entry { 184 int hmac_ctrl; 185 u16 esn; 186 u16 resv; 187 unsigned int enckey_len; 188 unsigned int kctx_len; 189 unsigned int authsize; 190 __be32 key_ctx_hdr; 191 char salt[MAX_SALT]; 192 char key[2 * AES_MAX_KEY_SIZE]; 193 }; 194 195 /* 196 * sgl_len - calculates the size of an SGL of the given capacity 197 * @n: the number of SGL entries 198 * Calculates the number of flits needed for a scatter/gather list that 199 * can hold the given number of entries. 200 */ 201 static inline unsigned int sgl_len(unsigned int n) 202 { 203 n--; 204 return (3 * n) / 2 + (n & 1) + 2; 205 } 206 207 static inline void *padap(struct chcr_dev *dev) 208 { 209 struct uld_ctx *u_ctx = container_of(dev, struct uld_ctx, dev); 210 211 return pci_get_drvdata(u_ctx->lldi.pdev); 212 } 213 214 struct uld_ctx *assign_chcr_device(void); 215 int chcr_send_wr(struct sk_buff *skb); 216 int start_crypto(void); 217 int stop_crypto(void); 218 int chcr_uld_rx_handler(void *handle, const __be64 *rsp, 219 const struct pkt_gl *pgl); 220 int chcr_uld_tx_handler(struct sk_buff *skb, struct net_device *dev); 221 int chcr_handle_resp(struct crypto_async_request *req, unsigned char *input, 222 int err); 223 int chcr_ipsec_xmit(struct sk_buff *skb, struct net_device *dev); 224 void chcr_add_xfrmops(const struct cxgb4_lld_info *lld); 225 #endif /* __CHCR_CORE_H__ */ 226