diff options
Diffstat (limited to 'arch/cris/include/arch-v32/arch/cryptocop.h')
| -rw-r--r-- | arch/cris/include/arch-v32/arch/cryptocop.h | 158 |
1 files changed, 158 insertions, 0 deletions
diff --git a/arch/cris/include/arch-v32/arch/cryptocop.h b/arch/cris/include/arch-v32/arch/cryptocop.h new file mode 100644 index 000000000..716e434e9 --- /dev/null +++ b/arch/cris/include/arch-v32/arch/cryptocop.h @@ -0,0 +1,158 @@ +/* + * The device /dev/cryptocop is accessible using this driver using + * CRYPTOCOP_MAJOR (254) and minor number 0. + */ +#ifndef CRYPTOCOP_H +#define CRYPTOCOP_H + +#include <uapi/arch-v32/arch/cryptocop.h> + + +/********** The API to use from inside the kernel. ************/ + +#include <arch/hwregs/dma.h> + +typedef enum { + cryptocop_alg_csum = 0, + cryptocop_alg_mem2mem, + cryptocop_alg_md5, + cryptocop_alg_sha1, + cryptocop_alg_des, + cryptocop_alg_3des, + cryptocop_alg_aes, + cryptocop_no_alg, +} cryptocop_algorithm; + +typedef u8 cryptocop_tfrm_id; + + +struct cryptocop_operation; + +typedef void (cryptocop_callback)(struct cryptocop_operation*, void*); + +struct cryptocop_transform_init { + cryptocop_algorithm alg; + /* Keydata for ciphers. */ + unsigned char key[CRYPTOCOP_MAX_KEY_LENGTH]; + unsigned int keylen; + cryptocop_cipher_mode cipher_mode; + cryptocop_3des_mode tdes_mode; + cryptocop_csum_type csum_mode; /* cryptocop_csum_none is not allowed when alg==cryptocop_alg_csum */ + + cryptocop_tfrm_id tid; /* Locally unique in session; assigned by user, checked by driver. */ + struct cryptocop_transform_init *next; +}; + + +typedef enum { + cryptocop_source_dma = 0, + cryptocop_source_des, + cryptocop_source_3des, + cryptocop_source_aes, + cryptocop_source_md5, + cryptocop_source_sha1, + cryptocop_source_csum, + cryptocop_source_none, +} cryptocop_source; + + +struct cryptocop_desc_cfg { + cryptocop_tfrm_id tid; + cryptocop_source src; + unsigned int last:1; /* Last use of this transform in the operation. Will push outdata when encountered. */ + struct cryptocop_desc_cfg *next; +}; + +struct cryptocop_desc { + size_t length; + struct cryptocop_desc_cfg *cfg; + struct cryptocop_desc *next; +}; + + +/* Flags for cryptocop_tfrm_cfg */ +#define CRYPTOCOP_NO_FLAG (0x00) +#define CRYPTOCOP_ENCRYPT (0x01) +#define CRYPTOCOP_DECRYPT (0x02) +#define CRYPTOCOP_EXPLICIT_IV (0x04) + +struct cryptocop_tfrm_cfg { + cryptocop_tfrm_id tid; + + unsigned int flags; /* DECRYPT, ENCRYPT, EXPLICIT_IV */ + + /* CBC initialisation vector for cihers. */ + u8 iv[CRYPTOCOP_MAX_IV_LENGTH]; + + /* The position in output where to write the transform output. The order + in which the driver writes the output is unspecified, hence if several + transforms write on the same positions in the output the result is + unspecified. */ + size_t inject_ix; + + struct cryptocop_tfrm_cfg *next; +}; + + + +struct cryptocop_dma_list_operation{ + /* The consumer can provide DMA lists to send to the co-processor. 'use_dmalists' in + struct cryptocop_operation must be set for the driver to use them. outlist, + out_data_buf, inlist and in_data_buf must all be physical addresses since they will + be loaded to DMA . */ + dma_descr_data *outlist; /* Out from memory to the co-processor. */ + char *out_data_buf; + dma_descr_data *inlist; /* In from the co-processor to memory. */ + char *in_data_buf; + + cryptocop_3des_mode tdes_mode; + cryptocop_csum_type csum_mode; +}; + + +struct cryptocop_tfrm_operation{ + /* Operation configuration, if not 'use_dmalists' is set. */ + struct cryptocop_tfrm_cfg *tfrm_cfg; + struct cryptocop_desc *desc; + + struct iovec *indata; + size_t incount; + size_t inlen; /* Total inlength. */ + + struct iovec *outdata; + size_t outcount; + size_t outlen; /* Total outlength. */ +}; + + +struct cryptocop_operation { + cryptocop_callback *cb; + void *cb_data; + + cryptocop_session_id sid; + + /* The status of the operation when returned to consumer. */ + int operation_status; /* 0, -EAGAIN */ + + /* Flags */ + unsigned int use_dmalists:1; /* Use outlist and inlist instead of the desc/tfrm_cfg configuration. */ + unsigned int in_interrupt:1; /* Set if inserting job from interrupt context. */ + unsigned int fast_callback:1; /* Set if fast callback wanted, i.e. from interrupt context. */ + + union{ + struct cryptocop_dma_list_operation list_op; + struct cryptocop_tfrm_operation tfrm_op; + }; +}; + + +int cryptocop_new_session(cryptocop_session_id *sid, struct cryptocop_transform_init *tinit, int alloc_flag); +int cryptocop_free_session(cryptocop_session_id sid); + +int cryptocop_job_queue_insert_csum(struct cryptocop_operation *operation); + +int cryptocop_job_queue_insert_crypto(struct cryptocop_operation *operation); + +int cryptocop_job_queue_insert_user_job(struct cryptocop_operation *operation); + +#endif /* CRYPTOCOP_H */ |