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gerrit-public.fairphone.software / kernel / msm-4.9 / a8fc391a15957e2f2871c4ea3f6e84c33095c374 / . / drivers / crypto / nx / nx.h
blob: befda07ca1da9e0978c59b9061cf79f2114bb9fb [file] [log] [blame]
Kent Yoderae0222b2012-05-14 10:59:38 +0000[diff] [blame]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
9static const char nx_driver_string[] = NX_STRING;
10static const char nx_driver_version[] = NX_VERSION;
11
12/* a scatterlist in the format PHYP is expecting */
13struct 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
22enum 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 */
30struct msc_triplet {
31 u32 keybitlen;
32 u32 databytelen;
33 u32 sglen;
34} __packed;
35
36struct max_sync_cop {
37 u32 fc;
38 u32 mode;
39 u32 triplets;
40 struct msc_triplet trip[0];
41} __packed;
42
43struct 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)
54struct 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
61struct 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
76struct 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
84struct 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)
94struct 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)
103struct 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
111struct nx_xcbc_priv {
112 u8 key[16];
113};
114
115struct nx_ctr_priv {
116 u8 iv[16];
117};
118
119struct nx_crypto_ctx {
Marcelo Cerric8491632013-08-12 18:49:37 -0300[diff] [blame]120 spinlock_t lock; /* synchronize access to the context */
Kent Yoderae0222b2012-05-14 10:59:38 +0000[diff] [blame]121 void *kmem; /* unaligned, kmalloc'd buffer */
122 size_t kmem_len; /* length of kmem */
123 struct nx_csbcpb *csbcpb; /* aligned page given to phyp @ hcall time */
124 struct vio_pfo_op op; /* operation struct with hcall parameters */
125 struct nx_csbcpb *csbcpb_aead; /* secondary csbcpb used by AEAD algs */
126 struct vio_pfo_op op_aead;/* operation struct for csbcpb_aead */
127
128 struct nx_sg *in_sg; /* aligned pointer into kmem to an sg list */
129 struct nx_sg *out_sg; /* aligned pointer into kmem to an sg list */
130
131 struct alg_props *ap; /* pointer into props based on our key size */
132 struct alg_props props[3];/* openFirmware properties for requests */
133 struct nx_stats *stats; /* pointer into an nx_crypto_driver for stats
134 reporting */
135
136 union {
137 struct nx_gcm_priv gcm;
138 struct nx_ccm_priv ccm;
139 struct nx_xcbc_priv xcbc;
140 struct nx_ctr_priv ctr;
141 } priv;
142};
143
144/* prototypes */
145int nx_crypto_ctx_aes_ccm_init(struct crypto_tfm *tfm);
146int nx_crypto_ctx_aes_gcm_init(struct crypto_tfm *tfm);
147int nx_crypto_ctx_aes_xcbc_init(struct crypto_tfm *tfm);
148int nx_crypto_ctx_aes_ctr_init(struct crypto_tfm *tfm);
149int nx_crypto_ctx_aes_cbc_init(struct crypto_tfm *tfm);
150int nx_crypto_ctx_aes_ecb_init(struct crypto_tfm *tfm);
151int nx_crypto_ctx_sha_init(struct crypto_tfm *tfm);
152void nx_crypto_ctx_exit(struct crypto_tfm *tfm);
153void nx_ctx_init(struct nx_crypto_ctx *nx_ctx, unsigned int function);
154int nx_hcall_sync(struct nx_crypto_ctx *ctx, struct vio_pfo_op *op,
155 u32 may_sleep);
156struct nx_sg *nx_build_sg_list(struct nx_sg *, u8 *, unsigned int, u32);
157int nx_build_sg_lists(struct nx_crypto_ctx *, struct blkcipher_desc *,
158 struct scatterlist *, struct scatterlist *, unsigned int,
Marcelo Cerria8fc3912013-08-29 11:36:31 -0300[diff] [blame^]159 unsigned int, u8 *);
Kent Yoderae0222b2012-05-14 10:59:38 +0000[diff] [blame]160struct nx_sg *nx_walk_and_build(struct nx_sg *, unsigned int,
161 struct scatterlist *, unsigned int,
162 unsigned int);
163
164#ifdef CONFIG_DEBUG_FS
165#define NX_DEBUGFS_INIT(drv) nx_debugfs_init(drv)
166#define NX_DEBUGFS_FINI(drv) nx_debugfs_fini(drv)
167
168int nx_debugfs_init(struct nx_crypto_driver *);
169void nx_debugfs_fini(struct nx_crypto_driver *);
170#else
171#define NX_DEBUGFS_INIT(drv) (0)
172#define NX_DEBUGFS_FINI(drv) (0)
173#endif
174
175#define NX_PAGE_NUM(x) ((u64)(x) & 0xfffffffffffff000ULL)
176
177extern struct crypto_alg nx_cbc_aes_alg;
178extern struct crypto_alg nx_ecb_aes_alg;
179extern struct crypto_alg nx_gcm_aes_alg;
180extern struct crypto_alg nx_gcm4106_aes_alg;
181extern struct crypto_alg nx_ctr_aes_alg;
182extern struct crypto_alg nx_ctr3686_aes_alg;
183extern struct crypto_alg nx_ccm_aes_alg;
184extern struct crypto_alg nx_ccm4309_aes_alg;
185extern struct shash_alg nx_shash_aes_xcbc_alg;
186extern struct shash_alg nx_shash_sha512_alg;
187extern struct shash_alg nx_shash_sha256_alg;
188
189extern struct nx_crypto_driver nx_driver;
190
191#define SCATTERWALK_TO_SG 1
192#define SCATTERWALK_FROM_SG 0
193
194#endif