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ae0222b7 KY |
1 | |
2 | #ifndef __NX_H__ | |
3 | #define __NX_H__ | |
4 | ||
030f4e96 HX |
5 | #include <crypto/ctr.h> |
6 | ||
ae0222b7 KY |
7 | #define NX_NAME "nx-crypto" |
8 | #define NX_STRING "IBM Power7+ Nest Accelerator Crypto Driver" | |
9 | #define NX_VERSION "1.0" | |
10 | ||
11 | static const char nx_driver_string[] = NX_STRING; | |
12 | static const char nx_driver_version[] = NX_VERSION; | |
13 | ||
14 | /* a scatterlist in the format PHYP is expecting */ | |
15 | struct nx_sg { | |
16 | u64 addr; | |
17 | u32 rsvd; | |
18 | u32 len; | |
19 | } __attribute((packed)); | |
20 | ||
21 | #define NX_PAGE_SIZE (4096) | |
22 | #define NX_MAX_SG_ENTRIES (NX_PAGE_SIZE/(sizeof(struct nx_sg))) | |
23 | ||
24 | enum nx_status { | |
25 | NX_DISABLED, | |
26 | NX_WAITING, | |
27 | NX_OKAY | |
28 | }; | |
29 | ||
30 | /* msc_triplet and max_sync_cop are used only to assist in parsing the | |
31 | * openFirmware property */ | |
32 | struct msc_triplet { | |
33 | u32 keybitlen; | |
34 | u32 databytelen; | |
35 | u32 sglen; | |
36 | } __packed; | |
37 | ||
38 | struct max_sync_cop { | |
39 | u32 fc; | |
40 | u32 mode; | |
41 | u32 triplets; | |
42 | struct msc_triplet trip[0]; | |
43 | } __packed; | |
44 | ||
45 | struct alg_props { | |
46 | u32 databytelen; | |
47 | u32 sglen; | |
48 | }; | |
49 | ||
50 | #define NX_OF_FLAG_MAXSGLEN_SET (1) | |
51 | #define NX_OF_FLAG_STATUS_SET (2) | |
52 | #define NX_OF_FLAG_MAXSYNCCOP_SET (4) | |
53 | #define NX_OF_FLAG_MASK_READY (NX_OF_FLAG_MAXSGLEN_SET | \ | |
54 | NX_OF_FLAG_STATUS_SET | \ | |
55 | NX_OF_FLAG_MAXSYNCCOP_SET) | |
56 | struct nx_of { | |
57 | u32 flags; | |
58 | u32 max_sg_len; | |
59 | enum nx_status status; | |
60 | struct alg_props ap[NX_MAX_FC][NX_MAX_MODE][3]; | |
61 | }; | |
62 | ||
63 | struct nx_stats { | |
64 | atomic_t aes_ops; | |
65 | atomic64_t aes_bytes; | |
66 | atomic_t sha256_ops; | |
67 | atomic64_t sha256_bytes; | |
68 | atomic_t sha512_ops; | |
69 | atomic64_t sha512_bytes; | |
70 | ||
71 | atomic_t sync_ops; | |
72 | ||
73 | atomic_t errors; | |
74 | atomic_t last_error; | |
75 | atomic_t last_error_pid; | |
76 | }; | |
77 | ||
78 | struct nx_debugfs { | |
79 | struct dentry *dfs_root; | |
80 | struct dentry *dfs_aes_ops, *dfs_aes_bytes; | |
81 | struct dentry *dfs_sha256_ops, *dfs_sha256_bytes; | |
82 | struct dentry *dfs_sha512_ops, *dfs_sha512_bytes; | |
83 | struct dentry *dfs_errors, *dfs_last_error, *dfs_last_error_pid; | |
84 | }; | |
85 | ||
86 | struct nx_crypto_driver { | |
87 | struct nx_stats stats; | |
88 | struct nx_of of; | |
89 | struct vio_dev *viodev; | |
90 | struct vio_driver viodriver; | |
91 | struct nx_debugfs dfs; | |
92 | }; | |
93 | ||
94 | #define NX_GCM4106_NONCE_LEN (4) | |
95 | #define NX_GCM_CTR_OFFSET (12) | |
030f4e96 | 96 | struct nx_gcm_rctx { |
ae0222b7 | 97 | u8 iv[16]; |
030f4e96 HX |
98 | }; |
99 | ||
100 | struct nx_gcm_priv { | |
ae0222b7 KY |
101 | u8 iauth_tag[16]; |
102 | u8 nonce[NX_GCM4106_NONCE_LEN]; | |
103 | }; | |
104 | ||
105 | #define NX_CCM_AES_KEY_LEN (16) | |
106 | #define NX_CCM4309_AES_KEY_LEN (19) | |
107 | #define NX_CCM4309_NONCE_LEN (3) | |
030f4e96 | 108 | struct nx_ccm_rctx { |
ae0222b7 | 109 | u8 iv[16]; |
030f4e96 HX |
110 | }; |
111 | ||
112 | struct nx_ccm_priv { | |
ae0222b7 KY |
113 | u8 b0[16]; |
114 | u8 iauth_tag[16]; | |
115 | u8 oauth_tag[16]; | |
116 | u8 nonce[NX_CCM4309_NONCE_LEN]; | |
117 | }; | |
118 | ||
119 | struct nx_xcbc_priv { | |
120 | u8 key[16]; | |
121 | }; | |
122 | ||
123 | struct nx_ctr_priv { | |
030f4e96 | 124 | u8 nonce[CTR_RFC3686_NONCE_SIZE]; |
ae0222b7 KY |
125 | }; |
126 | ||
127 | struct nx_crypto_ctx { | |
c849163b | 128 | spinlock_t lock; /* synchronize access to the context */ |
ae0222b7 KY |
129 | void *kmem; /* unaligned, kmalloc'd buffer */ |
130 | size_t kmem_len; /* length of kmem */ | |
131 | struct nx_csbcpb *csbcpb; /* aligned page given to phyp @ hcall time */ | |
132 | struct vio_pfo_op op; /* operation struct with hcall parameters */ | |
133 | struct nx_csbcpb *csbcpb_aead; /* secondary csbcpb used by AEAD algs */ | |
134 | struct vio_pfo_op op_aead;/* operation struct for csbcpb_aead */ | |
135 | ||
136 | struct nx_sg *in_sg; /* aligned pointer into kmem to an sg list */ | |
137 | struct nx_sg *out_sg; /* aligned pointer into kmem to an sg list */ | |
138 | ||
139 | struct alg_props *ap; /* pointer into props based on our key size */ | |
140 | struct alg_props props[3];/* openFirmware properties for requests */ | |
141 | struct nx_stats *stats; /* pointer into an nx_crypto_driver for stats | |
142 | reporting */ | |
143 | ||
144 | union { | |
145 | struct nx_gcm_priv gcm; | |
146 | struct nx_ccm_priv ccm; | |
147 | struct nx_xcbc_priv xcbc; | |
148 | struct nx_ctr_priv ctr; | |
149 | } priv; | |
150 | }; | |
151 | ||
9129c26d HX |
152 | struct crypto_aead; |
153 | ||
ae0222b7 | 154 | /* prototypes */ |
cc815653 | 155 | int nx_crypto_ctx_aes_ccm_init(struct crypto_aead *tfm); |
201f28f0 | 156 | int nx_crypto_ctx_aes_gcm_init(struct crypto_aead *tfm); |
ae0222b7 KY |
157 | int nx_crypto_ctx_aes_xcbc_init(struct crypto_tfm *tfm); |
158 | int nx_crypto_ctx_aes_ctr_init(struct crypto_tfm *tfm); | |
159 | int nx_crypto_ctx_aes_cbc_init(struct crypto_tfm *tfm); | |
160 | int nx_crypto_ctx_aes_ecb_init(struct crypto_tfm *tfm); | |
161 | int nx_crypto_ctx_sha_init(struct crypto_tfm *tfm); | |
162 | void nx_crypto_ctx_exit(struct crypto_tfm *tfm); | |
201f28f0 | 163 | void nx_crypto_ctx_aead_exit(struct crypto_aead *tfm); |
ae0222b7 KY |
164 | void nx_ctx_init(struct nx_crypto_ctx *nx_ctx, unsigned int function); |
165 | int nx_hcall_sync(struct nx_crypto_ctx *ctx, struct vio_pfo_op *op, | |
166 | u32 may_sleep); | |
f129430d | 167 | struct nx_sg *nx_build_sg_list(struct nx_sg *, u8 *, unsigned int *, u32); |
ae0222b7 | 168 | int nx_build_sg_lists(struct nx_crypto_ctx *, struct blkcipher_desc *, |
f129430d | 169 | struct scatterlist *, struct scatterlist *, unsigned int *, |
a8fc391a | 170 | unsigned int, u8 *); |
ae0222b7 KY |
171 | struct nx_sg *nx_walk_and_build(struct nx_sg *, unsigned int, |
172 | struct scatterlist *, unsigned int, | |
f129430d | 173 | unsigned int *); |
ae0222b7 KY |
174 | |
175 | #ifdef CONFIG_DEBUG_FS | |
176 | #define NX_DEBUGFS_INIT(drv) nx_debugfs_init(drv) | |
177 | #define NX_DEBUGFS_FINI(drv) nx_debugfs_fini(drv) | |
178 | ||
179 | int nx_debugfs_init(struct nx_crypto_driver *); | |
180 | void nx_debugfs_fini(struct nx_crypto_driver *); | |
181 | #else | |
182 | #define NX_DEBUGFS_INIT(drv) (0) | |
183 | #define NX_DEBUGFS_FINI(drv) (0) | |
184 | #endif | |
185 | ||
186 | #define NX_PAGE_NUM(x) ((u64)(x) & 0xfffffffffffff000ULL) | |
187 | ||
188 | extern struct crypto_alg nx_cbc_aes_alg; | |
189 | extern struct crypto_alg nx_ecb_aes_alg; | |
201f28f0 HX |
190 | extern struct aead_alg nx_gcm_aes_alg; |
191 | extern struct aead_alg nx_gcm4106_aes_alg; | |
ae0222b7 | 192 | extern struct crypto_alg nx_ctr3686_aes_alg; |
cc815653 HX |
193 | extern struct aead_alg nx_ccm_aes_alg; |
194 | extern struct aead_alg nx_ccm4309_aes_alg; | |
ae0222b7 KY |
195 | extern struct shash_alg nx_shash_aes_xcbc_alg; |
196 | extern struct shash_alg nx_shash_sha512_alg; | |
197 | extern struct shash_alg nx_shash_sha256_alg; | |
198 | ||
199 | extern struct nx_crypto_driver nx_driver; | |
200 | ||
201 | #define SCATTERWALK_TO_SG 1 | |
202 | #define SCATTERWALK_FROM_SG 0 | |
203 | ||
204 | #endif |