ceph/src/dpdk/lib/librte_cryptodev/rte_crypto.h

   1 /*-
   2  *   BSD LICENSE
   3  *
   4  *   Copyright(c) 2016 Intel Corporation. All rights reserved.
   5  *
   6  *   Redistribution and use in source and binary forms, with or without
   7  *   modification, are permitted provided that the following conditions
   8  *   are met:
   9  *
  10  *     * Redistributions of source code must retain the above copyright
  11  *       notice, this list of conditions and the following disclaimer.
  12  *     * Redistributions in binary form must reproduce the above copyright
  13  *       notice, this list of conditions and the following disclaimer in
  14  *       the documentation and/or other materials provided with the
  15  *       distribution.
  16  *     * Neither the name of Intel Corporation nor the names of its
  17  *       contributors may be used to endorse or promote products derived
  18  *       from this software without specific prior written permission.
  19  *
  20  *   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  21  *   "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  22  *   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  23  *   A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  24  *   OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  25  *   SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  26  *   LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  27  *   DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  28  *   THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  29  *   (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  30  *   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  31  */
  32
  33 #ifndef _RTE_CRYPTO_H_
  34 #define _RTE_CRYPTO_H_
  35
  36 /**
  37  * @file rte_crypto.h
  38  *
  39  * RTE Cryptography Common Definitions
  40  *
  41  */
  42
  43 #ifdef __cplusplus
  44 extern "C" {
  45 #endif
  46
  47
  48 #include <rte_mbuf.h>
  49 #include <rte_memory.h>
  50 #include <rte_mempool.h>
  51 #include <rte_common.h>
  52
  53 #include "rte_crypto_sym.h"
  54
  55 /** Crypto operation types */
  56 enum rte_crypto_op_type {
  57         RTE_CRYPTO_OP_TYPE_UNDEFINED,
  58         /**< Undefined operation type */
  59         RTE_CRYPTO_OP_TYPE_SYMMETRIC,
  60         /**< Symmetric operation */
  61 };
  62
  63 /** Status of crypto operation */
  64 enum rte_crypto_op_status {
  65         RTE_CRYPTO_OP_STATUS_SUCCESS,
  66         /**< Operation completed successfully */
  67         RTE_CRYPTO_OP_STATUS_NOT_PROCESSED,
  68         /**< Operation has not yet been processed by a crypto device */
  69         RTE_CRYPTO_OP_STATUS_ENQUEUED,
  70         /**< Operation is enqueued on device */
  71         RTE_CRYPTO_OP_STATUS_AUTH_FAILED,
  72         /**< Authentication verification failed */
  73         RTE_CRYPTO_OP_STATUS_INVALID_SESSION,
  74         /**<
  75          * Symmetric operation failed due to invalid session arguments, or if
  76          * in session-less mode, failed to allocate private operation material.
  77          */
  78         RTE_CRYPTO_OP_STATUS_INVALID_ARGS,
  79         /**< Operation failed due to invalid arguments in request */
  80         RTE_CRYPTO_OP_STATUS_ERROR,
  81         /**< Error handling operation */
  82 };
  83
  84 /**
  85  * Cryptographic Operation.
  86  *
  87  * This structure contains data relating to performing cryptographic
  88  * operations. This operation structure is used to contain any operation which
  89  * is supported by the cryptodev API, PMDs should check the type parameter to
  90  * verify that the operation is a support function of the device. Crypto
  91  * operations are enqueued and dequeued in crypto PMDs using the
  92  * rte_cryptodev_enqueue_burst() / rte_cryptodev_dequeue_burst() .
  93  */
  94 struct rte_crypto_op {
  95         enum rte_crypto_op_type type;
  96         /**< operation type */
  97
  98         enum rte_crypto_op_status status;
  99         /**<
 100          * operation status - this is reset to
 101          * RTE_CRYPTO_OP_STATUS_NOT_PROCESSED on allocation from mempool and
 102          * will be set to RTE_CRYPTO_OP_STATUS_SUCCESS after crypto operation
 103          * is successfully processed by a crypto PMD
 104          */
 105
 106         struct rte_mempool *mempool;
 107         /**< crypto operation mempool which operation is allocated from */
 108
 109         phys_addr_t phys_addr;
 110         /**< physical address of crypto operation */
 111
 112         void *opaque_data;
 113         /**< Opaque pointer for user data */
 114
 115         RTE_STD_C11
 116         union {
 117                 struct rte_crypto_sym_op *sym;
 118                 /**< Symmetric operation parameters */
 119         }; /**< operation specific parameters */
 120 } __rte_cache_aligned;
 121
 122 /**
 123  * Reset the fields of a crypto operation to their default values.
 124  *
 125  * @param       op      The crypto operation to be reset.
 126  * @param       type    The crypto operation type.
 127  */
 128 static inline void
 129 __rte_crypto_op_reset(struct rte_crypto_op *op, enum rte_crypto_op_type type)
 130 {
 131         op->type = type;
 132         op->status = RTE_CRYPTO_OP_STATUS_NOT_PROCESSED;
 133
 134         switch (type) {
 135         case RTE_CRYPTO_OP_TYPE_SYMMETRIC:
 136                 /** Symmetric operation structure starts after the end of the
 137                  * rte_crypto_op structure.
 138                  */
 139                 op->sym = (struct rte_crypto_sym_op *)(op + 1);
 140                 op->type = type;
 141
 142                 __rte_crypto_sym_op_reset(op->sym);
 143                 break;
 144         default:
 145                 break;
 146         }
 147
 148         op->opaque_data = NULL;
 149 }
 150
 151 /**
 152  * Private data structure belonging to a crypto symmetric operation pool.
 153  */
 154 struct rte_crypto_op_pool_private {
 155         enum rte_crypto_op_type type;
 156         /**< Crypto op pool type operation. */
 157         uint16_t priv_size;
 158         /**< Size of private area in each crypto operation. */
 159 };
 160
 161
 162 /**
 163  * Returns the size of private data allocated with each rte_crypto_op object by
 164  * the mempool
 165  *
 166  * @param       mempool rte_crypto_op mempool
 167  *
 168  * @return      private data size
 169  */
 170 static inline uint16_t
 171 __rte_crypto_op_get_priv_data_size(struct rte_mempool *mempool)
 172 {
 173         struct rte_crypto_op_pool_private *priv =
 174                 (struct rte_crypto_op_pool_private *) rte_mempool_get_priv(mempool);
 175
 176         return priv->priv_size;
 177 }
 178
 179
 180 /**
 181  * Creates a crypto operation pool
 182  *
 183  * @param       name            pool name
 184  * @param       type            crypto operation type, use
 185  *                              RTE_CRYPTO_OP_TYPE_UNDEFINED for a pool which
 186  *                              supports all operation types
 187  * @param       nb_elts         number of elements in pool
 188  * @param       cache_size      Number of elements to cache on lcore, see
 189  *                              *rte_mempool_create* for further details about
 190  *                              cache size
 191  * @param       priv_size       Size of private data to allocate with each
 192  *                              operation
 193  * @param       socket_id       Socket to allocate memory on
 194  *
 195  * @return
 196  *  - On success pointer to mempool
 197  *  - On failure NULL
 198  */
 199 extern struct rte_mempool *
 200 rte_crypto_op_pool_create(const char *name, enum rte_crypto_op_type type,
 201                 unsigned nb_elts, unsigned cache_size, uint16_t priv_size,
 202                 int socket_id);
 203
 204 /**
 205  * Bulk allocate raw element from mempool and return as crypto operations
 206  *
 207  * @param       mempool         crypto operation mempool.
 208  * @param       type            crypto operation type.
 209  * @param       ops             Array to place allocated crypto operations
 210  * @param       nb_ops          Number of crypto operations to allocate
 211  *
 212  * @returns
 213  * - On success returns  number of ops allocated
 214  */
 215 static inline int
 216 __rte_crypto_op_raw_bulk_alloc(struct rte_mempool *mempool,
 217                 enum rte_crypto_op_type type,
 218                 struct rte_crypto_op **ops, uint16_t nb_ops)
 219 {
 220         struct rte_crypto_op_pool_private *priv;
 221
 222         priv = (struct rte_crypto_op_pool_private *) rte_mempool_get_priv(mempool);
 223         if (unlikely(priv->type != type &&
 224                         priv->type != RTE_CRYPTO_OP_TYPE_UNDEFINED))
 225                 return -EINVAL;
 226
 227         if (rte_mempool_get_bulk(mempool, (void **)ops, nb_ops) == 0)
 228                 return nb_ops;
 229
 230         return 0;
 231 }
 232
 233 /**
 234  * Allocate a crypto operation from a mempool with default parameters set
 235  *
 236  * @param       mempool crypto operation mempool
 237  * @param       type    operation type to allocate
 238  *
 239  * @returns
 240  * - On success returns a valid rte_crypto_op structure
 241  * - On failure returns NULL
 242  */
 243 static inline struct rte_crypto_op *
 244 rte_crypto_op_alloc(struct rte_mempool *mempool, enum rte_crypto_op_type type)
 245 {
 246         struct rte_crypto_op *op = NULL;
 247         int retval;
 248
 249         retval = __rte_crypto_op_raw_bulk_alloc(mempool, type, &op, 1);
 250         if (unlikely(retval != 1))
 251                 return NULL;
 252
 253         __rte_crypto_op_reset(op, type);
 254
 255         return op;
 256 }
 257
 258
 259 /**
 260  * Bulk allocate crypto operations from a mempool with default parameters set
 261  *
 262  * @param       mempool crypto operation mempool
 263  * @param       type    operation type to allocate
 264  * @param       ops     Array to place allocated crypto operations
 265  * @param       nb_ops  Number of crypto operations to allocate
 266  *
 267  * @returns
 268  * - On success returns a valid rte_crypto_op structure
 269  * - On failure returns NULL
 270  */
 271
 272 static inline unsigned
 273 rte_crypto_op_bulk_alloc(struct rte_mempool *mempool,
 274                 enum rte_crypto_op_type type,
 275                 struct rte_crypto_op **ops, uint16_t nb_ops)
 276 {
 277         int i;
 278
 279         if (unlikely(__rte_crypto_op_raw_bulk_alloc(mempool, type, ops, nb_ops)
 280                         != nb_ops))
 281                 return 0;
 282
 283         for (i = 0; i < nb_ops; i++)
 284                 __rte_crypto_op_reset(ops[i], type);
 285
 286         return nb_ops;
 287 }
 288
 289
 290
 291 /**
 292  * Returns a pointer to the private data of a crypto operation if
 293  * that operation has enough capacity for requested size.
 294  *
 295  * @param       op      crypto operation.
 296  * @param       size    size of space requested in private data.
 297  *
 298  * @returns
 299  * - if sufficient space available returns pointer to start of private data
 300  * - if insufficient space returns NULL
 301  */
 302 static inline void *
 303 __rte_crypto_op_get_priv_data(struct rte_crypto_op *op, uint32_t size)
 304 {
 305         uint32_t priv_size;
 306
 307         if (likely(op->mempool != NULL)) {
 308                 priv_size = __rte_crypto_op_get_priv_data_size(op->mempool);
 309
 310                 if (likely(priv_size >= size))
 311                         return (void *)((uint8_t *)(op + 1) +
 312                                         sizeof(struct rte_crypto_sym_op));
 313         }
 314
 315         return NULL;
 316 }
 317
 318 /**
 319  * free crypto operation structure
 320  * If operation has been allocate from a rte_mempool, then the operation will
 321  * be returned to the mempool.
 322  *
 323  * @param       op      symmetric crypto operation
 324  */
 325 static inline void
 326 rte_crypto_op_free(struct rte_crypto_op *op)
 327 {
 328         if (op != NULL && op->mempool != NULL)
 329                 rte_mempool_put(op->mempool, op);
 330 }
 331
 332 /**
 333  * Allocate a symmetric crypto operation in the private data of an mbuf.
 334  *
 335  * @param       m       mbuf which is associated with the crypto operation, the
 336  *                      operation will be allocated in the private data of that
 337  *                      mbuf.
 338  *
 339  * @returns
 340  * - On success returns a pointer to the crypto operation.
 341  * - On failure returns NULL.
 342  */
 343 static inline struct rte_crypto_op *
 344 rte_crypto_sym_op_alloc_from_mbuf_priv_data(struct rte_mbuf *m)
 345 {
 346         if (unlikely(m == NULL))
 347                 return NULL;
 348
 349         /*
 350          * check that the mbuf's private data size is sufficient to contain a
 351          * crypto operation
 352          */
 353         if (unlikely(m->priv_size < (sizeof(struct rte_crypto_op) +
 354                         sizeof(struct rte_crypto_sym_op))))
 355                 return NULL;
 356
 357         /* private data starts immediately after the mbuf header in the mbuf. */
 358         struct rte_crypto_op *op = (struct rte_crypto_op *)(m + 1);
 359
 360         __rte_crypto_op_reset(op, RTE_CRYPTO_OP_TYPE_SYMMETRIC);
 361
 362         op->mempool = NULL;
 363         op->sym->m_src = m;
 364
 365         return op;
 366 }
 367
 368 /**
 369  * Allocate space for symmetric crypto xforms in the private data space of the
 370  * crypto operation. This also defaults the crypto xform type and configures
 371  * the chaining of the xforms in the crypto operation
 372  *
 373  * @return
 374  * - On success returns pointer to first crypto xform in crypto operations chain
 375  * - On failure returns NULL
 376  */
 377 static inline struct rte_crypto_sym_xform *
 378 rte_crypto_op_sym_xforms_alloc(struct rte_crypto_op *op, uint8_t nb_xforms)
 379 {
 380         void *priv_data;
 381         uint32_t size;
 382
 383         if (unlikely(op->type != RTE_CRYPTO_OP_TYPE_SYMMETRIC))
 384                 return NULL;
 385
 386         size = sizeof(struct rte_crypto_sym_xform) * nb_xforms;
 387
 388         priv_data = __rte_crypto_op_get_priv_data(op, size);
 389         if (priv_data == NULL)
 390                 return NULL;
 391
 392         return __rte_crypto_sym_op_sym_xforms_alloc(op->sym, priv_data,
 393                         nb_xforms);
 394 }
 395
 396
 397 /**
 398  * Attach a session to a crypto operation
 399  *
 400  * @param       op      crypto operation, must be of type symmetric
 401  * @param       sess    cryptodev session
 402  */
 403 static inline int
 404 rte_crypto_op_attach_sym_session(struct rte_crypto_op *op,
 405                 struct rte_cryptodev_sym_session *sess)
 406 {
 407         if (unlikely(op->type != RTE_CRYPTO_OP_TYPE_SYMMETRIC))
 408                 return -1;
 409
 410         return __rte_crypto_sym_op_attach_sym_session(op->sym, sess);
 411 }
 412
 413 #ifdef __cplusplus
 414 }
 415 #endif
 416
 417 #endif /* _RTE_CRYPTO_H_ */