drivers/crypto/cnxk/cn10k_ipsec.c

   1 /* SPDX-License-Identifier: BSD-3-Clause
   2  * Copyright(C) 2021 Marvell.
   3  */
   4
   5 #include <rte_malloc.h>
   6 #include <rte_cryptodev.h>
   7 #include <rte_esp.h>
   8 #include <rte_ip.h>
   9 #include <rte_security.h>
  10 #include <rte_security_driver.h>
  11 #include <rte_udp.h>
  12
  13 #include "cnxk_cryptodev.h"
  14 #include "cnxk_ipsec.h"
  15 #include "cnxk_security.h"
  16 #include "cn10k_ipsec.h"
  17
  18 #include "roc_api.h"
  19
  20 static int
  21 ipsec_xform_cipher_verify(struct rte_crypto_sym_xform *xform)
  22 {
  23         if (xform->cipher.algo == RTE_CRYPTO_CIPHER_AES_CBC) {
  24                 switch (xform->cipher.key.length) {
  25                 case 16:
  26                 case 24:
  27                 case 32:
  28                         break;
  29                 default:
  30                         return -ENOTSUP;
  31                 }
  32                 return 0;
  33         }
  34
  35         return -ENOTSUP;
  36 }
  37
  38 static int
  39 ipsec_xform_auth_verify(struct rte_crypto_sym_xform *xform)
  40 {
  41         uint16_t keylen = xform->auth.key.length;
  42
  43         if (xform->auth.algo == RTE_CRYPTO_AUTH_SHA1_HMAC) {
  44                 if (keylen >= 20 && keylen <= 64)
  45                         return 0;
  46         }
  47
  48         return -ENOTSUP;
  49 }
  50
  51 static int
  52 ipsec_xform_aead_verify(struct rte_security_ipsec_xform *ipsec_xfrm,
  53                         struct rte_crypto_sym_xform *crypto_xfrm)
  54 {
  55         if (ipsec_xfrm->direction == RTE_SECURITY_IPSEC_SA_DIR_EGRESS &&
  56             crypto_xfrm->aead.op != RTE_CRYPTO_AEAD_OP_ENCRYPT)
  57                 return -EINVAL;
  58
  59         if (ipsec_xfrm->direction == RTE_SECURITY_IPSEC_SA_DIR_INGRESS &&
  60             crypto_xfrm->aead.op != RTE_CRYPTO_AEAD_OP_DECRYPT)
  61                 return -EINVAL;
  62
  63         if (crypto_xfrm->aead.algo == RTE_CRYPTO_AEAD_AES_GCM) {
  64                 switch (crypto_xfrm->aead.key.length) {
  65                 case ROC_CPT_AES128_KEY_LEN:
  66                 case ROC_CPT_AES192_KEY_LEN:
  67                 case ROC_CPT_AES256_KEY_LEN:
  68                         break;
  69                 default:
  70                         return -EINVAL;
  71                 }
  72                 return 0;
  73         }
  74
  75         return -ENOTSUP;
  76 }
  77
  78 static int
  79 cn10k_ipsec_xform_verify(struct rte_security_ipsec_xform *ipsec_xfrm,
  80                          struct rte_crypto_sym_xform *crypto_xfrm)
  81 {
  82         struct rte_crypto_sym_xform *auth_xform, *cipher_xform;
  83         int ret;
  84
  85         if ((ipsec_xfrm->direction != RTE_SECURITY_IPSEC_SA_DIR_INGRESS) &&
  86             (ipsec_xfrm->direction != RTE_SECURITY_IPSEC_SA_DIR_EGRESS))
  87                 return -EINVAL;
  88
  89         if ((ipsec_xfrm->proto != RTE_SECURITY_IPSEC_SA_PROTO_ESP) &&
  90             (ipsec_xfrm->proto != RTE_SECURITY_IPSEC_SA_PROTO_AH))
  91                 return -EINVAL;
  92
  93         if ((ipsec_xfrm->mode != RTE_SECURITY_IPSEC_SA_MODE_TRANSPORT) &&
  94             (ipsec_xfrm->mode != RTE_SECURITY_IPSEC_SA_MODE_TUNNEL))
  95                 return -EINVAL;
  96
  97         if ((ipsec_xfrm->tunnel.type != RTE_SECURITY_IPSEC_TUNNEL_IPV4) &&
  98             (ipsec_xfrm->tunnel.type != RTE_SECURITY_IPSEC_TUNNEL_IPV6))
  99                 return -EINVAL;
 100
 101         if (crypto_xfrm->type == RTE_CRYPTO_SYM_XFORM_AEAD)
 102                 return ipsec_xform_aead_verify(ipsec_xfrm, crypto_xfrm);
 103
 104         if (crypto_xfrm->next == NULL)
 105                 return -EINVAL;
 106
 107         if (ipsec_xfrm->direction == RTE_SECURITY_IPSEC_SA_DIR_INGRESS) {
 108                 /* Ingress */
 109                 if (crypto_xfrm->type != RTE_CRYPTO_SYM_XFORM_AUTH ||
 110                     crypto_xfrm->next->type != RTE_CRYPTO_SYM_XFORM_CIPHER)
 111                         return -EINVAL;
 112                 auth_xform = crypto_xfrm;
 113                 cipher_xform = crypto_xfrm->next;
 114         } else {
 115                 /* Egress */
 116                 if (crypto_xfrm->type != RTE_CRYPTO_SYM_XFORM_CIPHER ||
 117                     crypto_xfrm->next->type != RTE_CRYPTO_SYM_XFORM_AUTH)
 118                         return -EINVAL;
 119                 cipher_xform = crypto_xfrm;
 120                 auth_xform = crypto_xfrm->next;
 121         }
 122
 123         ret = ipsec_xform_cipher_verify(cipher_xform);
 124         if (ret)
 125                 return ret;
 126
 127         ret = ipsec_xform_auth_verify(auth_xform);
 128         if (ret)
 129                 return ret;
 130
 131         return 0;
 132 }
 133
 134 static uint64_t
 135 ipsec_cpt_inst_w7_get(struct roc_cpt *roc_cpt, void *sa)
 136 {
 137         union cpt_inst_w7 w7;
 138
 139         w7.u64 = 0;
 140         w7.s.egrp = roc_cpt->eng_grp[CPT_ENG_TYPE_IE];
 141         w7.s.ctx_val = 1;
 142         w7.s.cptr = (uint64_t)sa;
 143         rte_mb();
 144
 145         return w7.u64;
 146 }
 147
 148 static int
 149 cn10k_ipsec_outb_sa_create(struct roc_cpt *roc_cpt,
 150                            struct rte_security_ipsec_xform *ipsec_xfrm,
 151                            struct rte_crypto_sym_xform *crypto_xfrm,
 152                            struct rte_security_session *sec_sess)
 153 {
 154         struct roc_ot_ipsec_outb_sa *out_sa;
 155         struct cnxk_ipsec_outb_rlens rlens;
 156         struct cn10k_sec_session *sess;
 157         struct cn10k_ipsec_sa *sa;
 158         union cpt_inst_w4 inst_w4;
 159         int ret;
 160
 161         sess = get_sec_session_private_data(sec_sess);
 162         sa = &sess->sa;
 163         out_sa = &sa->out_sa;
 164
 165         memset(out_sa, 0, sizeof(struct roc_ot_ipsec_outb_sa));
 166
 167         /* Translate security parameters to SA */
 168         ret = cnxk_ot_ipsec_outb_sa_fill(out_sa, ipsec_xfrm, crypto_xfrm);
 169         if (ret)
 170                 return ret;
 171
 172         sa->inst.w7 = ipsec_cpt_inst_w7_get(roc_cpt, sa);
 173
 174         /* Get Rlen calculation data */
 175         ret = cnxk_ipsec_outb_rlens_get(&rlens, ipsec_xfrm, crypto_xfrm);
 176         if (ret)
 177                 return ret;
 178
 179         sa->max_extended_len = rlens.max_extended_len;
 180
 181         /* pre-populate CPT INST word 4 */
 182         inst_w4.u64 = 0;
 183         inst_w4.s.opcode_major = ROC_IE_OT_MAJOR_OP_PROCESS_OUTBOUND_IPSEC;
 184         inst_w4.s.param1 = 0;
 185         sa->inst.w4 = inst_w4.u64;
 186
 187         return 0;
 188 }
 189
 190 static int
 191 cn10k_ipsec_inb_sa_create(struct roc_cpt *roc_cpt,
 192                           struct rte_security_ipsec_xform *ipsec_xfrm,
 193                           struct rte_crypto_sym_xform *crypto_xfrm,
 194                           struct rte_security_session *sec_sess)
 195 {
 196         struct roc_ot_ipsec_inb_sa *in_sa;
 197         struct cn10k_sec_session *sess;
 198         struct cn10k_ipsec_sa *sa;
 199         union cpt_inst_w4 inst_w4;
 200         int ret;
 201
 202         sess = get_sec_session_private_data(sec_sess);
 203         sa = &sess->sa;
 204         in_sa = &sa->in_sa;
 205
 206         /* Translate security parameters to SA */
 207         ret = cnxk_ot_ipsec_inb_sa_fill(in_sa, ipsec_xfrm, crypto_xfrm);
 208         if (ret)
 209                 return ret;
 210
 211         /* TODO add support for antireplay */
 212         sa->in_sa.w0.s.ar_win = 0;
 213
 214         /* TODO add support for udp encap */
 215
 216         sa->inst.w7 = ipsec_cpt_inst_w7_get(roc_cpt, sa);
 217
 218         /* pre-populate CPT INST word 4 */
 219         inst_w4.u64 = 0;
 220         inst_w4.s.opcode_major = ROC_IE_OT_MAJOR_OP_PROCESS_INBOUND_IPSEC;
 221
 222         /* Disable checksum verification for now */
 223         inst_w4.s.param1 = 7;
 224         sa->inst.w4 = inst_w4.u64;
 225
 226         return 0;
 227 }
 228
 229 static int
 230 cn10k_ipsec_session_create(void *dev,
 231                            struct rte_security_ipsec_xform *ipsec_xfrm,
 232                            struct rte_crypto_sym_xform *crypto_xfrm,
 233                            struct rte_security_session *sess)
 234 {
 235         struct rte_cryptodev *crypto_dev = dev;
 236         struct roc_cpt *roc_cpt;
 237         struct cnxk_cpt_vf *vf;
 238         int ret;
 239
 240         vf = crypto_dev->data->dev_private;
 241         roc_cpt = &vf->cpt;
 242
 243         if (crypto_dev->data->queue_pairs[0] == NULL) {
 244                 plt_err("Setup cpt queue pair before creating security session");
 245                 return -EPERM;
 246         }
 247
 248         ret = cn10k_ipsec_xform_verify(ipsec_xfrm, crypto_xfrm);
 249         if (ret)
 250                 return ret;
 251
 252         if (ipsec_xfrm->direction == RTE_SECURITY_IPSEC_SA_DIR_INGRESS)
 253                 return cn10k_ipsec_inb_sa_create(roc_cpt, ipsec_xfrm,
 254                                                  crypto_xfrm, sess);
 255         else
 256                 return cn10k_ipsec_outb_sa_create(roc_cpt, ipsec_xfrm,
 257                                                   crypto_xfrm, sess);
 258 }
 259
 260 static int
 261 cn10k_sec_session_create(void *device, struct rte_security_session_conf *conf,
 262                          struct rte_security_session *sess,
 263                          struct rte_mempool *mempool)
 264 {
 265         struct cn10k_sec_session *priv;
 266         int ret;
 267
 268         if (conf->action_type != RTE_SECURITY_ACTION_TYPE_LOOKASIDE_PROTOCOL)
 269                 return -EINVAL;
 270
 271         if (rte_mempool_get(mempool, (void **)&priv)) {
 272                 plt_err("Could not allocate security session private data");
 273                 return -ENOMEM;
 274         }
 275
 276         set_sec_session_private_data(sess, priv);
 277
 278         if (conf->protocol != RTE_SECURITY_PROTOCOL_IPSEC) {
 279                 ret = -ENOTSUP;
 280                 goto mempool_put;
 281         }
 282         ret = cn10k_ipsec_session_create(device, &conf->ipsec,
 283                                          conf->crypto_xform, sess);
 284         if (ret)
 285                 goto mempool_put;
 286
 287         return 0;
 288
 289 mempool_put:
 290         rte_mempool_put(mempool, priv);
 291         set_sec_session_private_data(sess, NULL);
 292         return ret;
 293 }
 294
 295 static int
 296 cn10k_sec_session_destroy(void *device __rte_unused,
 297                           struct rte_security_session *sess)
 298 {
 299         struct cn10k_sec_session *priv;
 300         struct rte_mempool *sess_mp;
 301
 302         priv = get_sec_session_private_data(sess);
 303
 304         if (priv == NULL)
 305                 return 0;
 306
 307         sess_mp = rte_mempool_from_obj(priv);
 308
 309         set_sec_session_private_data(sess, NULL);
 310         rte_mempool_put(sess_mp, priv);
 311
 312         return 0;
 313 }
 314
 315 static unsigned int
 316 cn10k_sec_session_get_size(void *device __rte_unused)
 317 {
 318         return sizeof(struct cn10k_sec_session);
 319 }
 320
 321 /* Update platform specific security ops */
 322 void
 323 cn10k_sec_ops_override(void)
 324 {
 325         /* Update platform specific ops */
 326         cnxk_sec_ops.session_create = cn10k_sec_session_create;
 327         cnxk_sec_ops.session_destroy = cn10k_sec_session_destroy;
 328         cnxk_sec_ops.session_get_size = cn10k_sec_session_get_size;
 329 }