1
2
3#ifndef __NX_H__
4#define __NX_H__
5
6#include <crypto/ctr.h>
7
8#define NX_NAME "nx-crypto"
9#define NX_STRING "IBM Power7+ Nest Accelerator Crypto Driver"
10#define NX_VERSION "1.0"
11
12static const char nx_driver_string[] = NX_STRING;
13static const char nx_driver_version[] = NX_VERSION;
14
15
16struct nx_sg {
17 u64 addr;
18 u32 rsvd;
19 u32 len;
20} __attribute((packed));
21
22#define NX_PAGE_SIZE (4096)
23#define NX_MAX_SG_ENTRIES (NX_PAGE_SIZE/(sizeof(struct nx_sg)))
24
25enum nx_status {
26 NX_DISABLED,
27 NX_WAITING,
28 NX_OKAY
29};
30
31
32
33struct msc_triplet {
34 u32 keybitlen;
35 u32 databytelen;
36 u32 sglen;
37} __packed;
38
39struct max_sync_cop {
40 u32 fc;
41 u32 mode;
42 u32 triplets;
43 struct msc_triplet trip[0];
44} __packed;
45
46struct alg_props {
47 u32 databytelen;
48 u32 sglen;
49};
50
51#define NX_OF_FLAG_MAXSGLEN_SET (1)
52#define NX_OF_FLAG_STATUS_SET (2)
53#define NX_OF_FLAG_MAXSYNCCOP_SET (4)
54#define NX_OF_FLAG_MASK_READY (NX_OF_FLAG_MAXSGLEN_SET | \
55 NX_OF_FLAG_STATUS_SET | \
56 NX_OF_FLAG_MAXSYNCCOP_SET)
57struct nx_of {
58 u32 flags;
59 u32 max_sg_len;
60 enum nx_status status;
61 struct alg_props ap[NX_MAX_FC][NX_MAX_MODE][3];
62};
63
64struct nx_stats {
65 atomic_t aes_ops;
66 atomic64_t aes_bytes;
67 atomic_t sha256_ops;
68 atomic64_t sha256_bytes;
69 atomic_t sha512_ops;
70 atomic64_t sha512_bytes;
71
72 atomic_t sync_ops;
73
74 atomic_t errors;
75 atomic_t last_error;
76 atomic_t last_error_pid;
77};
78
79struct nx_debugfs {
80 struct dentry *dfs_root;
81 struct dentry *dfs_aes_ops, *dfs_aes_bytes;
82 struct dentry *dfs_sha256_ops, *dfs_sha256_bytes;
83 struct dentry *dfs_sha512_ops, *dfs_sha512_bytes;
84 struct dentry *dfs_errors, *dfs_last_error, *dfs_last_error_pid;
85};
86
87struct nx_crypto_driver {
88 struct nx_stats stats;
89 struct nx_of of;
90 struct vio_dev *viodev;
91 struct vio_driver viodriver;
92 struct nx_debugfs dfs;
93};
94
95#define NX_GCM4106_NONCE_LEN (4)
96#define NX_GCM_CTR_OFFSET (12)
97struct nx_gcm_rctx {
98 u8 iv[16];
99};
100
101struct nx_gcm_priv {
102 u8 iauth_tag[16];
103 u8 nonce[NX_GCM4106_NONCE_LEN];
104};
105
106#define NX_CCM_AES_KEY_LEN (16)
107#define NX_CCM4309_AES_KEY_LEN (19)
108#define NX_CCM4309_NONCE_LEN (3)
109struct nx_ccm_rctx {
110 u8 iv[16];
111};
112
113struct nx_ccm_priv {
114 u8 b0[16];
115 u8 iauth_tag[16];
116 u8 oauth_tag[16];
117 u8 nonce[NX_CCM4309_NONCE_LEN];
118};
119
120struct nx_xcbc_priv {
121 u8 key[16];
122};
123
124struct nx_ctr_priv {
125 u8 nonce[CTR_RFC3686_NONCE_SIZE];
126};
127
128struct nx_crypto_ctx {
129 spinlock_t lock;
130 void *kmem;
131 size_t kmem_len;
132 struct nx_csbcpb *csbcpb;
133 struct vio_pfo_op op;
134 struct nx_csbcpb *csbcpb_aead;
135 struct vio_pfo_op op_aead;
136
137 struct nx_sg *in_sg;
138 struct nx_sg *out_sg;
139
140 struct alg_props *ap;
141 struct alg_props props[3];
142 struct nx_stats *stats;
143
144
145 union {
146 struct nx_gcm_priv gcm;
147 struct nx_ccm_priv ccm;
148 struct nx_xcbc_priv xcbc;
149 struct nx_ctr_priv ctr;
150 } priv;
151};
152
153struct crypto_aead;
154
155
156int nx_crypto_ctx_aes_ccm_init(struct crypto_aead *tfm);
157int nx_crypto_ctx_aes_gcm_init(struct crypto_aead *tfm);
158int nx_crypto_ctx_aes_xcbc_init(struct crypto_tfm *tfm);
159int nx_crypto_ctx_aes_ctr_init(struct crypto_tfm *tfm);
160int nx_crypto_ctx_aes_cbc_init(struct crypto_tfm *tfm);
161int nx_crypto_ctx_aes_ecb_init(struct crypto_tfm *tfm);
162int nx_crypto_ctx_sha_init(struct crypto_tfm *tfm);
163void nx_crypto_ctx_exit(struct crypto_tfm *tfm);
164void nx_crypto_ctx_aead_exit(struct crypto_aead *tfm);
165void nx_ctx_init(struct nx_crypto_ctx *nx_ctx, unsigned int function);
166int nx_hcall_sync(struct nx_crypto_ctx *ctx, struct vio_pfo_op *op,
167 u32 may_sleep);
168struct nx_sg *nx_build_sg_list(struct nx_sg *, u8 *, unsigned int *, u32);
169int nx_build_sg_lists(struct nx_crypto_ctx *, struct blkcipher_desc *,
170 struct scatterlist *, struct scatterlist *, unsigned int *,
171 unsigned int, u8 *);
172struct nx_sg *nx_walk_and_build(struct nx_sg *, unsigned int,
173 struct scatterlist *, unsigned int,
174 unsigned int *);
175
176#ifdef CONFIG_DEBUG_FS
177#define NX_DEBUGFS_INIT(drv) nx_debugfs_init(drv)
178#define NX_DEBUGFS_FINI(drv) nx_debugfs_fini(drv)
179
180int nx_debugfs_init(struct nx_crypto_driver *);
181void nx_debugfs_fini(struct nx_crypto_driver *);
182#else
183#define NX_DEBUGFS_INIT(drv) (0)
184#define NX_DEBUGFS_FINI(drv) (0)
185#endif
186
187#define NX_PAGE_NUM(x) ((u64)(x) & 0xfffffffffffff000ULL)
188
189extern struct crypto_alg nx_cbc_aes_alg;
190extern struct crypto_alg nx_ecb_aes_alg;
191extern struct aead_alg nx_gcm_aes_alg;
192extern struct aead_alg nx_gcm4106_aes_alg;
193extern struct crypto_alg nx_ctr3686_aes_alg;
194extern struct aead_alg nx_ccm_aes_alg;
195extern struct aead_alg nx_ccm4309_aes_alg;
196extern struct shash_alg nx_shash_aes_xcbc_alg;
197extern struct shash_alg nx_shash_sha512_alg;
198extern struct shash_alg nx_shash_sha256_alg;
199
200extern struct nx_crypto_driver nx_driver;
201
202#define SCATTERWALK_TO_SG 1
203#define SCATTERWALK_FROM_SG 0
204
205#endif
206
