drivers/crypto/cnxk/cn10k_ipsec.c

   1 /* SPDX-License-Identifier: BSD-3-Clause
   2  * Copyright(C) 2021 Marvell.
   3  */
   4
   5 #include <cryptodev_pmd.h>
   6 #include <rte_esp.h>
   7 #include <rte_ip.h>
   8 #include <rte_malloc.h>
   9 #include <rte_security.h>
  10 #include <rte_security_driver.h>
  11 #include <rte_udp.h>
  12
  13 #include "cn10k_ipsec.h"
  14 #include "cnxk_cryptodev.h"
  15 #include "cnxk_cryptodev_ops.h"
  16 #include "cnxk_ipsec.h"
  17 #include "cnxk_security.h"
  18
  19 #include "roc_api.h"
  20
  21 static uint64_t
  22 ipsec_cpt_inst_w7_get(struct roc_cpt *roc_cpt, void *sa)
  23 {
  24         union cpt_inst_w7 w7;
  25
  26         w7.u64 = 0;
  27         w7.s.egrp = roc_cpt->eng_grp[CPT_ENG_TYPE_IE];
  28         w7.s.ctx_val = 1;
  29         w7.s.cptr = (uint64_t)sa;
  30         rte_mb();
  31
  32         return w7.u64;
  33 }
  34
  35 static int
  36 cn10k_ipsec_outb_sa_create(struct roc_cpt *roc_cpt, struct roc_cpt_lf *lf,
  37                            struct rte_security_ipsec_xform *ipsec_xfrm,
  38                            struct rte_crypto_sym_xform *crypto_xfrm,
  39                            struct rte_security_session *sec_sess)
  40 {
  41         union roc_ot_ipsec_outb_param1 param1;
  42         struct roc_ot_ipsec_outb_sa *sa_dptr;
  43         struct cnxk_ipsec_outb_rlens rlens;
  44         struct cn10k_sec_session *sess;
  45         struct cn10k_ipsec_sa *sa;
  46         union cpt_inst_w4 inst_w4;
  47         void *out_sa;
  48         int ret = 0;
  49
  50         sess = get_sec_session_private_data(sec_sess);
  51         sa = &sess->sa;
  52         out_sa = &sa->out_sa;
  53
  54         /* Allocate memory to be used as dptr for CPT ucode WRITE_SA op */
  55         sa_dptr = plt_zmalloc(sizeof(struct roc_ot_ipsec_outb_sa), 8);
  56         if (sa_dptr == NULL) {
  57                 plt_err("Couldn't allocate memory for SA dptr");
  58                 return -ENOMEM;
  59         }
  60
  61         /* Translate security parameters to SA */
  62         ret = cnxk_ot_ipsec_outb_sa_fill(sa_dptr, ipsec_xfrm, crypto_xfrm);
  63         if (ret) {
  64                 plt_err("Could not fill outbound session parameters");
  65                 goto sa_dptr_free;
  66         }
  67
  68         sa->inst.w7 = ipsec_cpt_inst_w7_get(roc_cpt, out_sa);
  69
  70 #ifdef LA_IPSEC_DEBUG
  71         /* Use IV from application in debug mode */
  72         if (ipsec_xfrm->options.iv_gen_disable == 1) {
  73                 sa_dptr->w2.s.iv_src = ROC_IE_OT_SA_IV_SRC_FROM_SA;
  74                 if (crypto_xfrm->type == RTE_CRYPTO_SYM_XFORM_AEAD) {
  75                         sa->iv_offset = crypto_xfrm->aead.iv.offset;
  76                         sa->iv_length = crypto_xfrm->aead.iv.length;
  77                 } else {
  78                         sa->iv_offset = crypto_xfrm->cipher.iv.offset;
  79                         sa->iv_length = crypto_xfrm->cipher.iv.length;
  80                 }
  81         }
  82 #else
  83         if (ipsec_xfrm->options.iv_gen_disable != 0) {
  84                 plt_err("Application provided IV not supported");
  85                 ret = -ENOTSUP;
  86                 goto sa_dptr_free;
  87         }
  88 #endif
  89
  90         sa->is_outbound = true;
  91
  92         /* Get Rlen calculation data */
  93         ret = cnxk_ipsec_outb_rlens_get(&rlens, ipsec_xfrm, crypto_xfrm);
  94         if (ret)
  95                 goto sa_dptr_free;
  96
  97         sa->max_extended_len = rlens.max_extended_len;
  98
  99         /* pre-populate CPT INST word 4 */
 100         inst_w4.u64 = 0;
 101         inst_w4.s.opcode_major = ROC_IE_OT_MAJOR_OP_PROCESS_OUTBOUND_IPSEC;
 102
 103         param1.u16 = 0;
 104
 105         /* Disable IP checksum computation by default */
 106         param1.s.ip_csum_disable = ROC_IE_OT_SA_INNER_PKT_IP_CSUM_DISABLE;
 107
 108         if (ipsec_xfrm->options.ip_csum_enable) {
 109                 param1.s.ip_csum_disable =
 110                         ROC_IE_OT_SA_INNER_PKT_IP_CSUM_ENABLE;
 111         }
 112
 113         /* Disable L4 checksum computation by default */
 114         param1.s.l4_csum_disable = ROC_IE_OT_SA_INNER_PKT_L4_CSUM_DISABLE;
 115
 116         if (ipsec_xfrm->options.l4_csum_enable) {
 117                 param1.s.l4_csum_disable =
 118                         ROC_IE_OT_SA_INNER_PKT_L4_CSUM_ENABLE;
 119         }
 120
 121         inst_w4.s.param1 = param1.u16;
 122
 123         sa->inst.w4 = inst_w4.u64;
 124
 125         if (ipsec_xfrm->options.stats == 1) {
 126                 /* Enable mib counters */
 127                 sa_dptr->w0.s.count_mib_bytes = 1;
 128                 sa_dptr->w0.s.count_mib_pkts = 1;
 129         }
 130
 131         memset(out_sa, 0, sizeof(struct roc_ot_ipsec_outb_sa));
 132
 133         /* Copy word0 from sa_dptr to populate ctx_push_sz ctx_size fields */
 134         memcpy(out_sa, sa_dptr, 8);
 135
 136         plt_atomic_thread_fence(__ATOMIC_SEQ_CST);
 137
 138         /* Write session using microcode opcode */
 139         ret = roc_cpt_ctx_write(lf, sa_dptr, out_sa,
 140                                 sizeof(struct roc_ot_ipsec_outb_sa));
 141         if (ret) {
 142                 plt_err("Could not write outbound session to hardware");
 143                 goto sa_dptr_free;
 144         }
 145
 146         /* Trigger CTX flush so that data is written back to DRAM */
 147         roc_cpt_lf_ctx_flush(lf, out_sa, false);
 148
 149         plt_atomic_thread_fence(__ATOMIC_SEQ_CST);
 150
 151 sa_dptr_free:
 152         plt_free(sa_dptr);
 153
 154         return ret;
 155 }
 156
 157 static int
 158 cn10k_ipsec_inb_sa_create(struct roc_cpt *roc_cpt, struct roc_cpt_lf *lf,
 159                           struct rte_security_ipsec_xform *ipsec_xfrm,
 160                           struct rte_crypto_sym_xform *crypto_xfrm,
 161                           struct rte_security_session *sec_sess)
 162 {
 163         union roc_ot_ipsec_inb_param1 param1;
 164         struct roc_ot_ipsec_inb_sa *sa_dptr;
 165         struct cn10k_sec_session *sess;
 166         struct cn10k_ipsec_sa *sa;
 167         union cpt_inst_w4 inst_w4;
 168         void *in_sa;
 169         int ret = 0;
 170
 171         sess = get_sec_session_private_data(sec_sess);
 172         sa = &sess->sa;
 173         in_sa = &sa->in_sa;
 174
 175         /* Allocate memory to be used as dptr for CPT ucode WRITE_SA op */
 176         sa_dptr = plt_zmalloc(sizeof(struct roc_ot_ipsec_inb_sa), 8);
 177         if (sa_dptr == NULL) {
 178                 plt_err("Couldn't allocate memory for SA dptr");
 179                 return -ENOMEM;
 180         }
 181
 182         /* Translate security parameters to SA */
 183         ret = cnxk_ot_ipsec_inb_sa_fill(sa_dptr, ipsec_xfrm, crypto_xfrm);
 184         if (ret) {
 185                 plt_err("Could not fill inbound session parameters");
 186                 goto sa_dptr_free;
 187         }
 188
 189         sa->is_outbound = false;
 190         sa->inst.w7 = ipsec_cpt_inst_w7_get(roc_cpt, in_sa);
 191
 192         /* pre-populate CPT INST word 4 */
 193         inst_w4.u64 = 0;
 194         inst_w4.s.opcode_major = ROC_IE_OT_MAJOR_OP_PROCESS_INBOUND_IPSEC;
 195
 196         param1.u16 = 0;
 197
 198         /* Disable IP checksum verification by default */
 199         param1.s.ip_csum_disable = ROC_IE_OT_SA_INNER_PKT_IP_CSUM_DISABLE;
 200
 201         if (ipsec_xfrm->options.ip_csum_enable) {
 202                 param1.s.ip_csum_disable =
 203                         ROC_IE_OT_SA_INNER_PKT_IP_CSUM_ENABLE;
 204         }
 205
 206         /* Disable L4 checksum verification by default */
 207         param1.s.l4_csum_disable = ROC_IE_OT_SA_INNER_PKT_L4_CSUM_DISABLE;
 208
 209         if (ipsec_xfrm->options.l4_csum_enable) {
 210                 param1.s.l4_csum_disable =
 211                         ROC_IE_OT_SA_INNER_PKT_L4_CSUM_ENABLE;
 212         }
 213
 214         param1.s.esp_trailer_disable = 1;
 215
 216         inst_w4.s.param1 = param1.u16;
 217
 218         sa->inst.w4 = inst_w4.u64;
 219
 220         if (ipsec_xfrm->options.stats == 1) {
 221                 /* Enable mib counters */
 222                 sa_dptr->w0.s.count_mib_bytes = 1;
 223                 sa_dptr->w0.s.count_mib_pkts = 1;
 224         }
 225
 226         memset(in_sa, 0, sizeof(struct roc_ot_ipsec_inb_sa));
 227
 228         /* Copy word0 from sa_dptr to populate ctx_push_sz ctx_size fields */
 229         memcpy(in_sa, sa_dptr, 8);
 230
 231         plt_atomic_thread_fence(__ATOMIC_SEQ_CST);
 232
 233         /* Write session using microcode opcode */
 234         ret = roc_cpt_ctx_write(lf, sa_dptr, in_sa,
 235                                 sizeof(struct roc_ot_ipsec_inb_sa));
 236         if (ret) {
 237                 plt_err("Could not write inbound session to hardware");
 238                 goto sa_dptr_free;
 239         }
 240
 241         /* Trigger CTX flush so that data is written back to DRAM */
 242         roc_cpt_lf_ctx_flush(lf, in_sa, false);
 243
 244         plt_atomic_thread_fence(__ATOMIC_SEQ_CST);
 245
 246 sa_dptr_free:
 247         plt_free(sa_dptr);
 248
 249         return ret;
 250 }
 251
 252 static int
 253 cn10k_ipsec_session_create(void *dev,
 254                            struct rte_security_ipsec_xform *ipsec_xfrm,
 255                            struct rte_crypto_sym_xform *crypto_xfrm,
 256                            struct rte_security_session *sess)
 257 {
 258         struct rte_cryptodev *crypto_dev = dev;
 259         struct roc_cpt *roc_cpt;
 260         struct cnxk_cpt_vf *vf;
 261         struct cnxk_cpt_qp *qp;
 262         int ret;
 263
 264         qp = crypto_dev->data->queue_pairs[0];
 265         if (qp == NULL) {
 266                 plt_err("Setup cpt queue pair before creating security session");
 267                 return -EPERM;
 268         }
 269
 270         ret = cnxk_ipsec_xform_verify(ipsec_xfrm, crypto_xfrm);
 271         if (ret)
 272                 return ret;
 273
 274         vf = crypto_dev->data->dev_private;
 275         roc_cpt = &vf->cpt;
 276
 277         if (ipsec_xfrm->direction == RTE_SECURITY_IPSEC_SA_DIR_INGRESS)
 278                 return cn10k_ipsec_inb_sa_create(roc_cpt, &qp->lf, ipsec_xfrm,
 279                                                  crypto_xfrm, sess);
 280         else
 281                 return cn10k_ipsec_outb_sa_create(roc_cpt, &qp->lf, ipsec_xfrm,
 282                                                   crypto_xfrm, sess);
 283 }
 284
 285 static int
 286 cn10k_sec_session_create(void *device, struct rte_security_session_conf *conf,
 287                          struct rte_security_session *sess,
 288                          struct rte_mempool *mempool)
 289 {
 290         struct cn10k_sec_session *priv;
 291         int ret;
 292
 293         if (conf->action_type != RTE_SECURITY_ACTION_TYPE_LOOKASIDE_PROTOCOL)
 294                 return -EINVAL;
 295
 296         if (rte_mempool_get(mempool, (void **)&priv)) {
 297                 plt_err("Could not allocate security session private data");
 298                 return -ENOMEM;
 299         }
 300
 301         set_sec_session_private_data(sess, priv);
 302
 303         if (conf->protocol != RTE_SECURITY_PROTOCOL_IPSEC) {
 304                 ret = -ENOTSUP;
 305                 goto mempool_put;
 306         }
 307         ret = cn10k_ipsec_session_create(device, &conf->ipsec,
 308                                          conf->crypto_xform, sess);
 309         if (ret)
 310                 goto mempool_put;
 311
 312         return 0;
 313
 314 mempool_put:
 315         rte_mempool_put(mempool, priv);
 316         set_sec_session_private_data(sess, NULL);
 317         return ret;
 318 }
 319
 320 static int
 321 cn10k_sec_session_destroy(void *dev, struct rte_security_session *sec_sess)
 322 {
 323         struct rte_cryptodev *crypto_dev = dev;
 324         union roc_ot_ipsec_sa_word2 *w2;
 325         struct cn10k_sec_session *sess;
 326         struct rte_mempool *sess_mp;
 327         struct cn10k_ipsec_sa *sa;
 328         struct cnxk_cpt_qp *qp;
 329         struct roc_cpt_lf *lf;
 330
 331         sess = get_sec_session_private_data(sec_sess);
 332         if (sess == NULL)
 333                 return 0;
 334
 335         qp = crypto_dev->data->queue_pairs[0];
 336         if (qp == NULL)
 337                 return 0;
 338
 339         lf = &qp->lf;
 340
 341         sa = &sess->sa;
 342
 343         /* Trigger CTX flush to write dirty data back to DRAM */
 344         roc_cpt_lf_ctx_flush(lf, &sa->in_sa, false);
 345
 346         /* Wait for 1 ms so that flush is complete */
 347         rte_delay_ms(1);
 348
 349         w2 = (union roc_ot_ipsec_sa_word2 *)&sa->in_sa.w2;
 350         w2->s.valid = 0;
 351
 352         plt_atomic_thread_fence(__ATOMIC_SEQ_CST);
 353
 354         /* Trigger CTX reload to fetch new data from DRAM */
 355         roc_cpt_lf_ctx_reload(lf, &sa->in_sa);
 356
 357         sess_mp = rte_mempool_from_obj(sess);
 358
 359         set_sec_session_private_data(sec_sess, NULL);
 360         rte_mempool_put(sess_mp, sess);
 361
 362         return 0;
 363 }
 364
 365 static unsigned int
 366 cn10k_sec_session_get_size(void *device __rte_unused)
 367 {
 368         return sizeof(struct cn10k_sec_session);
 369 }
 370
 371 static int
 372 cn10k_sec_session_stats_get(void *device, struct rte_security_session *sess,
 373                             struct rte_security_stats *stats)
 374 {
 375         struct rte_cryptodev *crypto_dev = device;
 376         struct roc_ot_ipsec_outb_sa *out_sa;
 377         struct roc_ot_ipsec_inb_sa *in_sa;
 378         union roc_ot_ipsec_sa_word2 *w2;
 379         struct cn10k_sec_session *priv;
 380         struct cn10k_ipsec_sa *sa;
 381         struct cnxk_cpt_qp *qp;
 382
 383         priv = get_sec_session_private_data(sess);
 384         if (priv == NULL)
 385                 return -EINVAL;
 386
 387         qp = crypto_dev->data->queue_pairs[0];
 388         if (qp == NULL)
 389                 return -EINVAL;
 390
 391         sa = &priv->sa;
 392         w2 = (union roc_ot_ipsec_sa_word2 *)&sa->in_sa.w2;
 393
 394         stats->protocol = RTE_SECURITY_PROTOCOL_IPSEC;
 395
 396         if (w2->s.dir == ROC_IE_SA_DIR_OUTBOUND) {
 397                 out_sa = &sa->out_sa;
 398                 roc_cpt_lf_ctx_flush(&qp->lf, out_sa, false);
 399                 rte_delay_ms(1);
 400                 stats->ipsec.opackets = out_sa->ctx.mib_pkts;
 401                 stats->ipsec.obytes = out_sa->ctx.mib_octs;
 402         } else {
 403                 in_sa = &sa->in_sa;
 404                 roc_cpt_lf_ctx_flush(&qp->lf, in_sa, false);
 405                 rte_delay_ms(1);
 406                 stats->ipsec.ipackets = in_sa->ctx.mib_pkts;
 407                 stats->ipsec.ibytes = in_sa->ctx.mib_octs;
 408         }
 409
 410         return 0;
 411 }
 412
 413 /* Update platform specific security ops */
 414 void
 415 cn10k_sec_ops_override(void)
 416 {
 417         /* Update platform specific ops */
 418         cnxk_sec_ops.session_create = cn10k_sec_session_create;
 419         cnxk_sec_ops.session_destroy = cn10k_sec_session_destroy;
 420         cnxk_sec_ops.session_get_size = cn10k_sec_session_get_size;
 421         cnxk_sec_ops.session_stats_get = cn10k_sec_session_stats_get;
 422 }