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