include/asm-cris/arch-v32/cryptocop.h

   1 /*
   2  * The device /dev/cryptocop is accessible using this driver using
   3  * CRYPTOCOP_MAJOR (254) and minor number 0.
   4  */
   5
   6 #ifndef CRYPTOCOP_H
   7 #define CRYPTOCOP_H
   8
   9 #include <linux/uio.h>
  10
  11
  12 #define CRYPTOCOP_SESSION_ID_NONE (0)
  13
  14 typedef unsigned long long int cryptocop_session_id;
  15
  16 /* cryptocop ioctls */
  17 #define ETRAXCRYPTOCOP_IOCTYPE         (250)
  18
  19 #define CRYPTOCOP_IO_CREATE_SESSION    _IOWR(ETRAXCRYPTOCOP_IOCTYPE, 1, struct strcop_session_op)
  20 #define CRYPTOCOP_IO_CLOSE_SESSION     _IOW(ETRAXCRYPTOCOP_IOCTYPE, 2, struct strcop_session_op)
  21 #define CRYPTOCOP_IO_PROCESS_OP        _IOWR(ETRAXCRYPTOCOP_IOCTYPE, 3, struct strcop_crypto_op)
  22 #define CRYPTOCOP_IO_MAXNR             (3)
  23
  24 typedef enum {
  25         cryptocop_cipher_des = 0,
  26         cryptocop_cipher_3des = 1,
  27         cryptocop_cipher_aes = 2,
  28         cryptocop_cipher_m2m = 3, /* mem2mem is essentially a NULL cipher with blocklength=1 */
  29         cryptocop_cipher_none
  30 } cryptocop_cipher_type;
  31
  32 typedef enum {
  33         cryptocop_digest_sha1 = 0,
  34         cryptocop_digest_md5 = 1,
  35         cryptocop_digest_none
  36 } cryptocop_digest_type;
  37
  38 typedef enum {
  39         cryptocop_csum_le = 0,
  40         cryptocop_csum_be = 1,
  41         cryptocop_csum_none
  42 } cryptocop_csum_type;
  43
  44 typedef enum {
  45         cryptocop_cipher_mode_ecb = 0,
  46         cryptocop_cipher_mode_cbc,
  47         cryptocop_cipher_mode_none
  48 } cryptocop_cipher_mode;
  49
  50 typedef enum {
  51         cryptocop_3des_eee = 0,
  52         cryptocop_3des_eed = 1,
  53         cryptocop_3des_ede = 2,
  54         cryptocop_3des_edd = 3,
  55         cryptocop_3des_dee = 4,
  56         cryptocop_3des_ded = 5,
  57         cryptocop_3des_dde = 6,
  58         cryptocop_3des_ddd = 7
  59 } cryptocop_3des_mode;
  60
  61 /* Usermode accessible (ioctl) operations. */
  62 struct strcop_session_op{
  63         cryptocop_session_id    ses_id;
  64
  65         cryptocop_cipher_type   cipher; /* AES, DES, 3DES, m2m, none */
  66
  67         cryptocop_cipher_mode   cmode; /* ECB, CBC, none */
  68         cryptocop_3des_mode     des3_mode;
  69
  70         cryptocop_digest_type   digest; /* MD5, SHA1, none */
  71
  72         cryptocop_csum_type     csum;   /* BE, LE, none */
  73
  74         unsigned char           *key;
  75         size_t                  keylen;
  76 };
  77
  78 #define CRYPTOCOP_CSUM_LENGTH         (2)
  79 #define CRYPTOCOP_MAX_DIGEST_LENGTH   (20)  /* SHA-1 20, MD5 16 */
  80 #define CRYPTOCOP_MAX_IV_LENGTH       (16)  /* (3)DES==8, AES == 16 */
  81 #define CRYPTOCOP_MAX_KEY_LENGTH      (32)
  82
  83 struct strcop_crypto_op{
  84         cryptocop_session_id ses_id;
  85
  86         /* Indata. */
  87         unsigned char            *indata;
  88         size_t                   inlen; /* Total indata length. */
  89
  90         /* Cipher configuration. */
  91         unsigned char            do_cipher:1;
  92         unsigned char            decrypt:1; /* 1 == decrypt, 0 == encrypt */
  93         unsigned char            cipher_explicit:1;
  94         size_t                   cipher_start;
  95         size_t                   cipher_len;
  96         /* cipher_iv is used if do_cipher and cipher_explicit and the cipher
  97            mode is CBC.  The length is controlled by the type of cipher,
  98            e.g. DES/3DES 8 octets and AES 16 octets. */
  99         unsigned char            cipher_iv[CRYPTOCOP_MAX_IV_LENGTH];
 100         /* Outdata. */
 101         unsigned char            *cipher_outdata;
 102         size_t                   cipher_outlen;
 103
 104         /* digest configuration. */
 105         unsigned char            do_digest:1;
 106         size_t                   digest_start;
 107         size_t                   digest_len;
 108         /* Outdata.  The actual length is determined by the type of the digest. */
 109         unsigned char            digest[CRYPTOCOP_MAX_DIGEST_LENGTH];
 110
 111         /* Checksum configuration. */
 112         unsigned char            do_csum:1;
 113         size_t                   csum_start;
 114         size_t                   csum_len;
 115         /* Outdata. */
 116         unsigned char            csum[CRYPTOCOP_CSUM_LENGTH];
 117 };
 118
 119
 120
 121 #ifdef __KERNEL__
 122
 123 /********** The API to use from inside the kernel. ************/
 124
 125 #include <asm/arch/hwregs/dma.h>
 126
 127 typedef enum {
 128         cryptocop_alg_csum = 0,
 129         cryptocop_alg_mem2mem,
 130         cryptocop_alg_md5,
 131         cryptocop_alg_sha1,
 132         cryptocop_alg_des,
 133         cryptocop_alg_3des,
 134         cryptocop_alg_aes,
 135         cryptocop_no_alg,
 136 } cryptocop_algorithm;
 137
 138 typedef u8 cryptocop_tfrm_id;
 139
 140
 141 struct cryptocop_operation;
 142
 143 typedef void (cryptocop_callback)(struct cryptocop_operation*, void*);
 144
 145 struct cryptocop_transform_init {
 146         cryptocop_algorithm    alg;
 147         /* Keydata for ciphers. */
 148         unsigned char          key[CRYPTOCOP_MAX_KEY_LENGTH];
 149         unsigned int           keylen;
 150         cryptocop_cipher_mode  cipher_mode;
 151         cryptocop_3des_mode    tdes_mode;
 152         cryptocop_csum_type    csum_mode; /* cryptocop_csum_none is not allowed when alg==cryptocop_alg_csum */
 153
 154         cryptocop_tfrm_id tid; /* Locally unique in session; assigned by user, checked by driver. */
 155         struct cryptocop_transform_init *next;
 156 };
 157
 158
 159 typedef enum {
 160         cryptocop_source_dma = 0,
 161         cryptocop_source_des,
 162         cryptocop_source_3des,
 163         cryptocop_source_aes,
 164         cryptocop_source_md5,
 165         cryptocop_source_sha1,
 166         cryptocop_source_csum,
 167         cryptocop_source_none,
 168 } cryptocop_source;
 169
 170
 171 struct cryptocop_desc_cfg {
 172         cryptocop_tfrm_id tid;
 173         cryptocop_source src;
 174         unsigned int last:1; /* Last use of this transform in the operation.  Will push outdata when encountered. */
 175         struct cryptocop_desc_cfg *next;
 176 };
 177
 178 struct cryptocop_desc {
 179         size_t length;
 180         struct cryptocop_desc_cfg *cfg;
 181         struct cryptocop_desc *next;
 182 };
 183
 184
 185 /* Flags for cryptocop_tfrm_cfg */
 186 #define CRYPTOCOP_NO_FLAG     (0x00)
 187 #define CRYPTOCOP_ENCRYPT     (0x01)
 188 #define CRYPTOCOP_DECRYPT     (0x02)
 189 #define CRYPTOCOP_EXPLICIT_IV (0x04)
 190
 191 struct cryptocop_tfrm_cfg {
 192         cryptocop_tfrm_id tid;
 193
 194         unsigned int flags; /* DECRYPT, ENCRYPT, EXPLICIT_IV */
 195
 196         /* CBC initialisation vector for cihers. */
 197         u8 iv[CRYPTOCOP_MAX_IV_LENGTH];
 198
 199         /* The position in output where to write the transform output.  The order
 200            in which the driver writes the output is unspecified, hence if several
 201            transforms write on the same positions in the output the result is
 202            unspecified. */
 203         size_t inject_ix;
 204
 205         struct cryptocop_tfrm_cfg *next;
 206 };
 207
 208
 209
 210 struct cryptocop_dma_list_operation{
 211         /* The consumer can provide DMA lists to send to the co-processor.  'use_dmalists' in
 212            struct cryptocop_operation must be set for the driver to use them.  outlist,
 213            out_data_buf, inlist and in_data_buf must all be physical addresses since they will
 214            be loaded to DMA . */
 215         dma_descr_data *outlist; /* Out from memory to the co-processor. */
 216         char           *out_data_buf;
 217         dma_descr_data *inlist; /* In from the co-processor to memory. */
 218         char           *in_data_buf;
 219
 220         cryptocop_3des_mode tdes_mode;
 221         cryptocop_csum_type csum_mode;
 222 };
 223
 224
 225 struct cryptocop_tfrm_operation{
 226         /* Operation configuration, if not 'use_dmalists' is set. */
 227         struct cryptocop_tfrm_cfg *tfrm_cfg;
 228         struct cryptocop_desc *desc;
 229
 230         struct iovec *indata;
 231         size_t incount;
 232         size_t inlen; /* Total inlength. */
 233
 234         struct iovec *outdata;
 235         size_t outcount;
 236         size_t outlen; /* Total outlength. */
 237 };
 238
 239
 240 struct cryptocop_operation {
 241         cryptocop_callback *cb;
 242         void *cb_data;
 243
 244         cryptocop_session_id sid;
 245
 246         /* The status of the operation when returned to consumer. */
 247         int operation_status; /* 0, -EAGAIN */
 248
 249         /* Flags */
 250         unsigned int use_dmalists:1;  /* Use outlist and inlist instead of the desc/tfrm_cfg configuration. */
 251         unsigned int in_interrupt:1;  /* Set if inserting job from interrupt context. */
 252         unsigned int fast_callback:1; /* Set if fast callback wanted, i.e. from interrupt context. */
 253
 254         union{
 255                 struct cryptocop_dma_list_operation list_op;
 256                 struct cryptocop_tfrm_operation tfrm_op;
 257         };
 258 };
 259
 260
 261 int cryptocop_new_session(cryptocop_session_id *sid, struct cryptocop_transform_init *tinit, int alloc_flag);
 262 int cryptocop_free_session(cryptocop_session_id sid);
 263
 264 int cryptocop_job_queue_insert_csum(struct cryptocop_operation *operation);
 265
 266 int cryptocop_job_queue_insert_crypto(struct cryptocop_operation *operation);
 267
 268 int cryptocop_job_queue_insert_user_job(struct cryptocop_operation *operation);
 269
 270 #endif /* __KERNEL__ */
 271
 272 #endif /* CRYPTOCOP_H */