Commit | Line | Data |
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51533b61 MS |
1 | /* |
2 | * The device /dev/cryptocop is accessible using this driver using | |
3 | * CRYPTOCOP_MAJOR (254) and minor number 0. | |
4 | */ | |
51533b61 MS |
5 | #ifndef CRYPTOCOP_H |
6 | #define CRYPTOCOP_H | |
7 | ||
98d848ea | 8 | #include <uapi/arch-v32/arch/cryptocop.h> |
51533b61 MS |
9 | |
10 | ||
51533b61 MS |
11 | /********** The API to use from inside the kernel. ************/ |
12 | ||
556dcee7 | 13 | #include <arch/hwregs/dma.h> |
51533b61 MS |
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 cihers. */ | |
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 | ||
51533b61 | 158 | #endif /* CRYPTOCOP_H */ |