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

   1 /*
   2  * The device /dev/cryptocop is accessible using this driver using
   3  * CRYPTOCOP_MAJOR (254) and minor number 0.
   4  */
   5 #ifndef CRYPTOCOP_H
   6 #define CRYPTOCOP_H
   7
   8 #include <uapi/arch-v32/arch/cryptocop.h>
   9
  10
  11 /********** The API to use from inside the kernel. ************/
  12
  13 #include <arch/hwregs/dma.h>
  14
  15 typedef enum {
  16         cryptocop_alg_csum = 0,
  17         cryptocop_alg_mem2mem,
  18         cryptocop_alg_md5,
  19         cryptocop_alg_sha1,
  20         cryptocop_alg_des,
  21         cryptocop_alg_3des,
  22         cryptocop_alg_aes,
  23         cryptocop_no_alg,
  24 } cryptocop_algorithm;
  25
  26 typedef u8 cryptocop_tfrm_id;
  27
  28
  29 struct cryptocop_operation;
  30
  31 typedef void (cryptocop_callback)(struct cryptocop_operation*, void*);
  32
  33 struct cryptocop_transform_init {
  34         cryptocop_algorithm    alg;
  35         /* Keydata for ciphers. */
  36         unsigned char          key[CRYPTOCOP_MAX_KEY_LENGTH];
  37         unsigned int           keylen;
  38         cryptocop_cipher_mode  cipher_mode;
  39         cryptocop_3des_mode    tdes_mode;
  40         cryptocop_csum_type    csum_mode; /* cryptocop_csum_none is not allowed when alg==cryptocop_alg_csum */
  41
  42         cryptocop_tfrm_id tid; /* Locally unique in session; assigned by user, checked by driver. */
  43         struct cryptocop_transform_init *next;
  44 };
  45
  46
  47 typedef enum {
  48         cryptocop_source_dma = 0,
  49         cryptocop_source_des,
  50         cryptocop_source_3des,
  51         cryptocop_source_aes,
  52         cryptocop_source_md5,
  53         cryptocop_source_sha1,
  54         cryptocop_source_csum,
  55         cryptocop_source_none,
  56 } cryptocop_source;
  57
  58
  59 struct cryptocop_desc_cfg {
  60         cryptocop_tfrm_id tid;
  61         cryptocop_source src;
  62         unsigned int last:1; /* Last use of this transform in the operation.  Will push outdata when encountered. */
  63         struct cryptocop_desc_cfg *next;
  64 };
  65
  66 struct cryptocop_desc {
  67         size_t length;
  68         struct cryptocop_desc_cfg *cfg;
  69         struct cryptocop_desc *next;
  70 };
  71
  72
  73 /* Flags for cryptocop_tfrm_cfg */
  74 #define CRYPTOCOP_NO_FLAG     (0x00)
  75 #define CRYPTOCOP_ENCRYPT     (0x01)
  76 #define CRYPTOCOP_DECRYPT     (0x02)
  77 #define CRYPTOCOP_EXPLICIT_IV (0x04)
  78
  79 struct cryptocop_tfrm_cfg {
  80         cryptocop_tfrm_id tid;
  81
  82         unsigned int flags; /* DECRYPT, ENCRYPT, EXPLICIT_IV */
  83
  84         /* CBC initialisation vector for ciphers. */
  85         u8 iv[CRYPTOCOP_MAX_IV_LENGTH];
  86
  87         /* The position in output where to write the transform output.  The order
  88            in which the driver writes the output is unspecified, hence if several
  89            transforms write on the same positions in the output the result is
  90            unspecified. */
  91         size_t inject_ix;
  92
  93         struct cryptocop_tfrm_cfg *next;
  94 };
  95
  96
  97
  98 struct cryptocop_dma_list_operation{
  99         /* The consumer can provide DMA lists to send to the co-processor.  'use_dmalists' in
 100            struct cryptocop_operation must be set for the driver to use them.  outlist,
 101            out_data_buf, inlist and in_data_buf must all be physical addresses since they will
 102            be loaded to DMA . */
 103         dma_descr_data *outlist; /* Out from memory to the co-processor. */
 104         char           *out_data_buf;
 105         dma_descr_data *inlist; /* In from the co-processor to memory. */
 106         char           *in_data_buf;
 107
 108         cryptocop_3des_mode tdes_mode;
 109         cryptocop_csum_type csum_mode;
 110 };
 111
 112
 113 struct cryptocop_tfrm_operation{
 114         /* Operation configuration, if not 'use_dmalists' is set. */
 115         struct cryptocop_tfrm_cfg *tfrm_cfg;
 116         struct cryptocop_desc *desc;
 117
 118         struct iovec *indata;
 119         size_t incount;
 120         size_t inlen; /* Total inlength. */
 121
 122         struct iovec *outdata;
 123         size_t outcount;
 124         size_t outlen; /* Total outlength. */
 125 };
 126
 127
 128 struct cryptocop_operation {
 129         cryptocop_callback *cb;
 130         void *cb_data;
 131
 132         cryptocop_session_id sid;
 133
 134         /* The status of the operation when returned to consumer. */
 135         int operation_status; /* 0, -EAGAIN */
 136
 137         /* Flags */
 138         unsigned int use_dmalists:1;  /* Use outlist and inlist instead of the desc/tfrm_cfg configuration. */
 139         unsigned int in_interrupt:1;  /* Set if inserting job from interrupt context. */
 140         unsigned int fast_callback:1; /* Set if fast callback wanted, i.e. from interrupt context. */
 141
 142         union{
 143                 struct cryptocop_dma_list_operation list_op;
 144                 struct cryptocop_tfrm_operation tfrm_op;
 145         };
 146 };
 147
 148
 149 int cryptocop_new_session(cryptocop_session_id *sid, struct cryptocop_transform_init *tinit, int alloc_flag);
 150 int cryptocop_free_session(cryptocop_session_id sid);
 151
 152 int cryptocop_job_queue_insert_csum(struct cryptocop_operation *operation);
 153
 154 int cryptocop_job_queue_insert_crypto(struct cryptocop_operation *operation);
 155
 156 int cryptocop_job_queue_insert_user_job(struct cryptocop_operation *operation);
 157
 158 #endif /* CRYPTOCOP_H */