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1/* SPDX-License-Identifier: GPL-2.0 */
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
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[];
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_crypto_driver {
77 struct nx_stats stats;
78 struct nx_of of;
79 struct vio_dev *viodev;
80 struct vio_driver viodriver;
81 struct dentry *dfs_root;
82};
83
84#define NX_GCM4106_NONCE_LEN (4)
85#define NX_GCM_CTR_OFFSET (12)
86struct nx_gcm_rctx {
87 u8 iv[16];
88};
89
90struct nx_gcm_priv {
91 u8 iauth_tag[16];
92 u8 nonce[NX_GCM4106_NONCE_LEN];
93};
94
95#define NX_CCM_AES_KEY_LEN (16)
96#define NX_CCM4309_AES_KEY_LEN (19)
97#define NX_CCM4309_NONCE_LEN (3)
98struct nx_ccm_rctx {
99 u8 iv[16];
100};
101
102struct nx_ccm_priv {
103 u8 b0[16];
104 u8 iauth_tag[16];
105 u8 oauth_tag[16];
106 u8 nonce[NX_CCM4309_NONCE_LEN];
107};
108
109struct nx_xcbc_priv {
110 u8 key[16];
111};
112
113struct nx_ctr_priv {
114 u8 nonce[CTR_RFC3686_NONCE_SIZE];
115};
116
117struct nx_crypto_ctx {
118 spinlock_t lock; /* synchronize access to the context */
119 void *kmem; /* unaligned, kmalloc'd buffer */
120 size_t kmem_len; /* length of kmem */
121 struct nx_csbcpb *csbcpb; /* aligned page given to phyp @ hcall time */
122 struct vio_pfo_op op; /* operation struct with hcall parameters */
123 struct nx_csbcpb *csbcpb_aead; /* secondary csbcpb used by AEAD algs */
124 struct vio_pfo_op op_aead;/* operation struct for csbcpb_aead */
125
126 struct nx_sg *in_sg; /* aligned pointer into kmem to an sg list */
127 struct nx_sg *out_sg; /* aligned pointer into kmem to an sg list */
128
129 struct alg_props *ap; /* pointer into props based on our key size */
130 struct alg_props props[3];/* openFirmware properties for requests */
131 struct nx_stats *stats; /* pointer into an nx_crypto_driver for stats
132 reporting */
133
134 union {
135 struct nx_gcm_priv gcm;
136 struct nx_ccm_priv ccm;
137 struct nx_xcbc_priv xcbc;
138 struct nx_ctr_priv ctr;
139 } priv;
140};
141
142struct crypto_aead;
143
144/* prototypes */
145int nx_crypto_ctx_aes_ccm_init(struct crypto_aead *tfm);
146int nx_crypto_ctx_aes_gcm_init(struct crypto_aead *tfm);
147int nx_crypto_ctx_aes_xcbc_init(struct crypto_tfm *tfm);
148int nx_crypto_ctx_aes_ctr_init(struct crypto_skcipher *tfm);
149int nx_crypto_ctx_aes_cbc_init(struct crypto_skcipher *tfm);
150int nx_crypto_ctx_aes_ecb_init(struct crypto_skcipher *tfm);
151int nx_crypto_ctx_sha_init(struct crypto_tfm *tfm);
152void nx_crypto_ctx_exit(struct crypto_tfm *tfm);
153void nx_crypto_ctx_skcipher_exit(struct crypto_skcipher *tfm);
154void nx_crypto_ctx_aead_exit(struct crypto_aead *tfm);
155void nx_ctx_init(struct nx_crypto_ctx *nx_ctx, unsigned int function);
156int nx_hcall_sync(struct nx_crypto_ctx *ctx, struct vio_pfo_op *op,
157 u32 may_sleep);
158struct nx_sg *nx_build_sg_list(struct nx_sg *, u8 *, unsigned int *, u32);
159int nx_build_sg_lists(struct nx_crypto_ctx *nx_ctx, const u8 *iv,
160 struct scatterlist *dst, struct scatterlist *src,
161 unsigned int *nbytes, unsigned int offset, u8 *oiv);
162struct nx_sg *nx_walk_and_build(struct nx_sg *, unsigned int,
163 struct scatterlist *, unsigned int,
164 unsigned int *);
165
166#ifdef CONFIG_DEBUG_FS
167#define NX_DEBUGFS_INIT(drv) nx_debugfs_init(drv)
168#define NX_DEBUGFS_FINI(drv) nx_debugfs_fini(drv)
169
170void nx_debugfs_init(struct nx_crypto_driver *);
171void nx_debugfs_fini(struct nx_crypto_driver *);
172#else
173#define NX_DEBUGFS_INIT(drv) do {} while (0)
174#define NX_DEBUGFS_FINI(drv) do {} while (0)
175#endif
176
177#define NX_PAGE_NUM(x) ((u64)(x) & 0xfffffffffffff000ULL)
178
179extern struct skcipher_alg nx_cbc_aes_alg;
180extern struct skcipher_alg nx_ecb_aes_alg;
181extern struct aead_alg nx_gcm_aes_alg;
182extern struct aead_alg nx_gcm4106_aes_alg;
183extern struct skcipher_alg nx_ctr3686_aes_alg;
184extern struct aead_alg nx_ccm_aes_alg;
185extern struct aead_alg nx_ccm4309_aes_alg;
186extern struct shash_alg nx_shash_aes_xcbc_alg;
187extern struct shash_alg nx_shash_sha512_alg;
188extern struct shash_alg nx_shash_sha256_alg;
189
190extern struct nx_crypto_driver nx_driver;
191
192#define SCATTERWALK_TO_SG 1
193#define SCATTERWALK_FROM_SG 0
194
195#endif
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/* a scatterlist in the format PHYP is expecting */
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/* msc_triplet and max_sync_cop are used only to assist in parsing the
31 * openFirmware property */
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; /* synchronize access to the context */
129 void *kmem; /* unaligned, kmalloc'd buffer */
130 size_t kmem_len; /* length of kmem */
131 struct nx_csbcpb *csbcpb; /* aligned page given to phyp @ hcall time */
132 struct vio_pfo_op op; /* operation struct with hcall parameters */
133 struct nx_csbcpb *csbcpb_aead; /* secondary csbcpb used by AEAD algs */
134 struct vio_pfo_op op_aead;/* operation struct for csbcpb_aead */
135
136 struct nx_sg *in_sg; /* aligned pointer into kmem to an sg list */
137 struct nx_sg *out_sg; /* aligned pointer into kmem to an sg list */
138
139 struct alg_props *ap; /* pointer into props based on our key size */
140 struct alg_props props[3];/* openFirmware properties for requests */
141 struct nx_stats *stats; /* pointer into an nx_crypto_driver for stats
142 reporting */
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/* prototypes */
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