drivers/crypto/chelsio/chcr_core.h

   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__ */