linux-imx

// SPDX-License-Identifier: GPL-2.0+

/*

 * caam - Freescale FSL CAAM support for crypto API

 *

 * Copyright 2008-2011 Freescale Semiconductor, Inc.

 * Copyright 2016-2019 NXP

 *

 * Based on talitos crypto API driver.

 *

 * relationship of job descriptors to shared descriptors (SteveC Dec 10 2008):

 *

 * ---------------                     ---------------

 * | JobDesc #1  |-------------------->|  ShareDesc  |

 * | *(packet 1) |                     |   (PDB)     |

 * ---------------      |------------->|  (hashKey)  |

 *       .              |              | (cipherKey) |

 *       .              |    |-------->| (operation) |

 * ---------------      |    |         ---------------

 * | JobDesc #2  |------|    |

 * | *(packet 2) |           |

 * ---------------           |

 *       .                   |

 *       .                   |

 * ---------------           |

 * | JobDesc #3  |------------

 * | *(packet 3) |

 * ---------------

 *

 * The SharedDesc never changes for a connection unless rekeyed, but

 * each packet will likely be in a different place. So all we need

 * to know to process the packet is where the input is, where the

 * output goes, and what context we want to process with. Context is

 * in the SharedDesc, packet references in the JobDesc.

 *

 * So, a job desc looks like:

 *

 * ---------------------

 * | Header            |

 * | ShareDesc Pointer |

 * | SEQ_OUT_PTR       |

 * | (output buffer)   |

 * | (output length)   |

 * | SEQ_IN_PTR        |

 * | (input buffer)    |

 * | (input length)    |

 * ---------------------

 */

​

#include "compat.h"

​

#include "regs.h"

#include "intern.h"

#include "desc_constr.h"

#include "jr.h"

#include "error.h"

#include "sg_sw_sec4.h"

#include "key_gen.h"

#include "caamalg_desc.h"

​

/*

 * crypto alg

 */

#define CAAM_CRA_PRIORITY       3000

/* max key is sum of AES_MAX_KEY_SIZE, max split key size */

#define CAAM_MAX_KEY_SIZE       (AES_MAX_KEY_SIZE + \

                     CTR_RFC3686_NONCE_SIZE + \

                     SHA512_DIGEST_SIZE * 2)

​

#define AEAD_DESC_JOB_IO_LEN        (DESC_JOB_IO_LEN + CAAM_CMD_SZ * 2)

#define GCM_DESC_JOB_IO_LEN     (AEAD_DESC_JOB_IO_LEN + \

                     CAAM_CMD_SZ * 4)

#define AUTHENC_DESC_JOB_IO_LEN     (AEAD_DESC_JOB_IO_LEN + \

                     CAAM_CMD_SZ * 5)

​

#define CHACHAPOLY_DESC_JOB_IO_LEN  (AEAD_DESC_JOB_IO_LEN + CAAM_CMD_SZ * 6)

​

#define DESC_MAX_USED_BYTES     (CAAM_DESC_BYTES_MAX - DESC_JOB_IO_LEN)

#define DESC_MAX_USED_LEN       (DESC_MAX_USED_BYTES / CAAM_CMD_SZ)

​

#ifdef DEBUG

/* for print_hex_dumps with line references */

#define debug(format, arg...) printk(format, arg)

#else

#define debug(format, arg...)

#endif

​

struct caam_alg_entry {

    int class1_alg_type;

    int class2_alg_type;

    bool rfc3686;

    bool geniv;

};