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authorKent Yoder <key@linux.vnet.ibm.com>2012-05-14 06:59:38 -0400
committerBenjamin Herrenschmidt <benh@kernel.crashing.org>2012-05-16 01:05:41 -0400
commitae0222b7289db6c14c790ea7ffa759b3d933a78f (patch)
tree70db8251c3dce4f93b8e15e1197e413a24d00a62 /drivers/crypto/nx/nx.h
parent828d2b59717380149bae1e56e2820c8f9c00e211 (diff)
powerpc/crypto: nx driver code supporting nx encryption
These routines add the base device driver code supporting the Power7+ in-Nest encryption accelerator (nx) device. Signed-off-by: Kent Yoder <key@linux.vnet.ibm.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Diffstat (limited to 'drivers/crypto/nx/nx.h')
-rw-r--r--drivers/crypto/nx/nx.h193
1 files changed, 193 insertions, 0 deletions
diff --git a/drivers/crypto/nx/nx.h b/drivers/crypto/nx/nx.h
new file mode 100644
index 000000000000..3232b182dd28
--- /dev/null
+++ b/drivers/crypto/nx/nx.h
@@ -0,0 +1,193 @@
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 {
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 */
144int nx_crypto_ctx_aes_ccm_init(struct crypto_tfm *tfm);
145int nx_crypto_ctx_aes_gcm_init(struct crypto_tfm *tfm);
146int nx_crypto_ctx_aes_xcbc_init(struct crypto_tfm *tfm);
147int nx_crypto_ctx_aes_ctr_init(struct crypto_tfm *tfm);
148int nx_crypto_ctx_aes_cbc_init(struct crypto_tfm *tfm);
149int nx_crypto_ctx_aes_ecb_init(struct crypto_tfm *tfm);
150int nx_crypto_ctx_sha_init(struct crypto_tfm *tfm);
151void nx_crypto_ctx_exit(struct crypto_tfm *tfm);
152void nx_ctx_init(struct nx_crypto_ctx *nx_ctx, unsigned int function);
153int nx_hcall_sync(struct nx_crypto_ctx *ctx, struct vio_pfo_op *op,
154 u32 may_sleep);
155struct nx_sg *nx_build_sg_list(struct nx_sg *, u8 *, unsigned int, u32);
156int nx_build_sg_lists(struct nx_crypto_ctx *, struct blkcipher_desc *,
157 struct scatterlist *, struct scatterlist *, unsigned int,
158 u8 *);
159struct 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
167int nx_debugfs_init(struct nx_crypto_driver *);
168void 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
176extern struct crypto_alg nx_cbc_aes_alg;
177extern struct crypto_alg nx_ecb_aes_alg;
178extern struct crypto_alg nx_gcm_aes_alg;
179extern struct crypto_alg nx_gcm4106_aes_alg;
180extern struct crypto_alg nx_ctr_aes_alg;
181extern struct crypto_alg nx_ctr3686_aes_alg;
182extern struct crypto_alg nx_ccm_aes_alg;
183extern struct crypto_alg nx_ccm4309_aes_alg;
184extern struct shash_alg nx_shash_aes_xcbc_alg;
185extern struct shash_alg nx_shash_sha512_alg;
186extern struct shash_alg nx_shash_sha256_alg;
187
188extern struct nx_crypto_driver nx_driver;
189
190#define SCATTERWALK_TO_SG 1
191#define SCATTERWALK_FROM_SG 0
192
193#endif
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