1
2#ifndef __NX_H__
3#define __NX_H__
4
5#include <crypto/ctr.h>
6
7#define NX_NAME "nx-crypto"
8#define NX_STRING "IBM Power7+ Nest Accelerator Crypto Driver"
9#define NX_VERSION "1.0"
10
11static const char nx_driver_string[] = NX_STRING;
12static const char nx_driver_version[] = NX_VERSION;
13
14
15struct 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
24enum nx_status {
25 NX_DISABLED,
26 NX_WAITING,
27 NX_OKAY
28};
29
30
31
32struct msc_triplet {
33 u32 keybitlen;
34 u32 databytelen;
35 u32 sglen;
36} __packed;
37
38struct max_sync_cop {
39 u32 fc;
40 u32 mode;
41 u32 triplets;
42 struct msc_triplet trip[0];
43} __packed;
44
45struct 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)
56struct 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
63struct 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
78struct 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
86struct 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)
96struct nx_gcm_rctx {
97 u8 iv[16];
98};
99
100struct nx_gcm_priv {
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)
108struct nx_ccm_rctx {
109 u8 iv[16];
110};
111
112struct nx_ccm_priv {
113 u8 b0[16];
114 u8 iauth_tag[16];
115 u8 oauth_tag[16];
116 u8 nonce[NX_CCM4309_NONCE_LEN];
117};
118
119struct nx_xcbc_priv {
120 u8 key[16];
121};
122
123struct nx_ctr_priv {
124 u8 nonce[CTR_RFC3686_NONCE_SIZE];
125};
126
127struct nx_crypto_ctx {
128 spinlock_t lock;
129 void *kmem;
130 size_t kmem_len;
131 struct nx_csbcpb *csbcpb;
132 struct vio_pfo_op op;
133 struct nx_csbcpb *csbcpb_aead;
134 struct vio_pfo_op op_aead;
135
136 struct nx_sg *in_sg;
137 struct nx_sg *out_sg;
138
139 struct alg_props *ap;
140 struct alg_props props[3];
141 struct nx_stats *stats;
142
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
152struct crypto_aead;
153
154
155int nx_crypto_ctx_aes_ccm_init(struct crypto_aead *tfm);
156int nx_crypto_ctx_aes_gcm_init(struct crypto_aead *tfm);
157int nx_crypto_ctx_aes_xcbc_init(struct crypto_tfm *tfm);
158int nx_crypto_ctx_aes_ctr_init(struct crypto_tfm *tfm);
159int nx_crypto_ctx_aes_cbc_init(struct crypto_tfm *tfm);
160int nx_crypto_ctx_aes_ecb_init(struct crypto_tfm *tfm);
161int nx_crypto_ctx_sha_init(struct crypto_tfm *tfm);
162void nx_crypto_ctx_exit(struct crypto_tfm *tfm);
163void nx_crypto_ctx_aead_exit(struct crypto_aead *tfm);
164void nx_ctx_init(struct nx_crypto_ctx *nx_ctx, unsigned int function);
165int nx_hcall_sync(struct nx_crypto_ctx *ctx, struct vio_pfo_op *op,
166 u32 may_sleep);
167struct nx_sg *nx_build_sg_list(struct nx_sg *, u8 *, unsigned int *, u32);
168int nx_build_sg_lists(struct nx_crypto_ctx *, struct blkcipher_desc *,
169 struct scatterlist *, struct scatterlist *, unsigned int *,
170 unsigned int, u8 *);
171struct nx_sg *nx_walk_and_build(struct nx_sg *, unsigned int,
172 struct scatterlist *, unsigned int,
173 unsigned int *);
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
179int nx_debugfs_init(struct nx_crypto_driver *);
180void 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
188extern struct crypto_alg nx_cbc_aes_alg;
189extern struct crypto_alg nx_ecb_aes_alg;
190extern struct aead_alg nx_gcm_aes_alg;
191extern struct aead_alg nx_gcm4106_aes_alg;
192extern struct crypto_alg nx_ctr3686_aes_alg;
193extern struct aead_alg nx_ccm_aes_alg;
194extern struct aead_alg nx_ccm4309_aes_alg;
195extern struct shash_alg nx_shash_aes_xcbc_alg;
196extern struct shash_alg nx_shash_sha512_alg;
197extern struct shash_alg nx_shash_sha256_alg;
198
199extern struct nx_crypto_driver nx_driver;
200
201#define SCATTERWALK_TO_SG 1
202#define SCATTERWALK_FROM_SG 0
203
204#endif
205
