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Linux kernel mirror (for testing)
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1/* SPDX-License-Identifier: GPL-2.0 */
2
3#ifndef __NX_H__
4#define __NX_H__
5
6#include <asm/vio.h>
7#include <crypto/ctr.h>
8#include <crypto/internal/aead.h>
9#include <crypto/internal/hash.h>
10#include <crypto/internal/skcipher.h>
11
12#define NX_NAME "nx-crypto"
13#define NX_STRING "IBM Power7+ Nest Accelerator Crypto Driver"
14#define NX_VERSION "1.0"
15
16/* a scatterlist in the format PHYP is expecting */
17struct nx_sg {
18 u64 addr;
19 u32 rsvd;
20 u32 len;
21} __attribute((packed));
22
23#define NX_PAGE_SIZE (4096)
24#define NX_MAX_SG_ENTRIES (NX_PAGE_SIZE/(sizeof(struct nx_sg)))
25
26enum nx_status {
27 NX_DISABLED,
28 NX_WAITING,
29 NX_OKAY
30};
31
32/* msc_triplet and max_sync_cop are used only to assist in parsing the
33 * openFirmware property */
34struct msc_triplet {
35 u32 keybitlen;
36 u32 databytelen;
37 u32 sglen;
38} __packed;
39
40struct max_sync_cop {
41 u32 fc;
42 u32 mode;
43 u32 triplets;
44 struct msc_triplet trip[];
45} __packed;
46
47struct alg_props {
48 u32 databytelen;
49 u32 sglen;
50};
51
52#define NX_OF_FLAG_MAXSGLEN_SET (1)
53#define NX_OF_FLAG_STATUS_SET (2)
54#define NX_OF_FLAG_MAXSYNCCOP_SET (4)
55#define NX_OF_FLAG_MASK_READY (NX_OF_FLAG_MAXSGLEN_SET | \
56 NX_OF_FLAG_STATUS_SET | \
57 NX_OF_FLAG_MAXSYNCCOP_SET)
58struct nx_of {
59 u32 flags;
60 u32 max_sg_len;
61 enum nx_status status;
62 struct alg_props ap[NX_MAX_FC][NX_MAX_MODE][3];
63};
64
65struct nx_stats {
66 atomic_t aes_ops;
67 atomic64_t aes_bytes;
68 atomic_t sha256_ops;
69 atomic64_t sha256_bytes;
70 atomic_t sha512_ops;
71 atomic64_t sha512_bytes;
72
73 atomic_t sync_ops;
74
75 atomic_t errors;
76 atomic_t last_error;
77 atomic_t last_error_pid;
78};
79
80struct nx_crypto_driver {
81 struct nx_stats stats;
82 struct nx_of of;
83 struct vio_dev *viodev;
84 struct vio_driver viodriver;
85 struct dentry *dfs_root;
86};
87
88#define NX_GCM4106_NONCE_LEN (4)
89#define NX_GCM_CTR_OFFSET (12)
90struct nx_gcm_rctx {
91 u8 iv[16];
92};
93
94struct nx_gcm_priv {
95 u8 iauth_tag[16];
96 u8 nonce[NX_GCM4106_NONCE_LEN];
97};
98
99#define NX_CCM_AES_KEY_LEN (16)
100#define NX_CCM4309_AES_KEY_LEN (19)
101#define NX_CCM4309_NONCE_LEN (3)
102struct nx_ccm_rctx {
103 u8 iv[16];
104};
105
106struct nx_ccm_priv {
107 u8 b0[16];
108 u8 iauth_tag[16];
109 u8 oauth_tag[16];
110 u8 nonce[NX_CCM4309_NONCE_LEN];
111};
112
113struct nx_xcbc_priv {
114 u8 key[16];
115};
116
117struct nx_ctr_priv {
118 u8 nonce[CTR_RFC3686_NONCE_SIZE];
119};
120
121struct nx_crypto_ctx {
122 spinlock_t lock; /* synchronize access to the context */
123 void *kmem; /* unaligned, kmalloc'd buffer */
124 size_t kmem_len; /* length of kmem */
125 struct nx_csbcpb *csbcpb; /* aligned page given to phyp @ hcall time */
126 struct vio_pfo_op op; /* operation struct with hcall parameters */
127 struct nx_csbcpb *csbcpb_aead; /* secondary csbcpb used by AEAD algs */
128 struct vio_pfo_op op_aead;/* operation struct for csbcpb_aead */
129
130 struct nx_sg *in_sg; /* aligned pointer into kmem to an sg list */
131 struct nx_sg *out_sg; /* aligned pointer into kmem to an sg list */
132
133 struct alg_props *ap; /* pointer into props based on our key size */
134 struct alg_props props[3];/* openFirmware properties for requests */
135 struct nx_stats *stats; /* pointer into an nx_crypto_driver for stats
136 reporting */
137
138 union {
139 struct nx_gcm_priv gcm;
140 struct nx_ccm_priv ccm;
141 struct nx_xcbc_priv xcbc;
142 struct nx_ctr_priv ctr;
143 } priv;
144};
145
146struct scatterlist;
147
148/* prototypes */
149int nx_crypto_ctx_aes_ccm_init(struct crypto_aead *tfm);
150int nx_crypto_ctx_aes_gcm_init(struct crypto_aead *tfm);
151int nx_crypto_ctx_aes_xcbc_init(struct crypto_shash *tfm);
152int nx_crypto_ctx_aes_ctr_init(struct crypto_skcipher *tfm);
153int nx_crypto_ctx_aes_cbc_init(struct crypto_skcipher *tfm);
154int nx_crypto_ctx_aes_ecb_init(struct crypto_skcipher *tfm);
155int nx_crypto_ctx_sha_init(struct crypto_shash *tfm);
156void nx_crypto_ctx_exit(struct crypto_tfm *tfm);
157void nx_crypto_ctx_skcipher_exit(struct crypto_skcipher *tfm);
158void nx_crypto_ctx_aead_exit(struct crypto_aead *tfm);
159void nx_crypto_ctx_shash_exit(struct crypto_shash *tfm);
160void nx_ctx_init(struct nx_crypto_ctx *nx_ctx, unsigned int function);
161int nx_hcall_sync(struct nx_crypto_ctx *ctx, struct vio_pfo_op *op,
162 u32 may_sleep);
163struct nx_sg *nx_build_sg_list(struct nx_sg *, u8 *, unsigned int *, u32);
164int nx_build_sg_lists(struct nx_crypto_ctx *nx_ctx, const u8 *iv,
165 struct scatterlist *dst, struct scatterlist *src,
166 unsigned int *nbytes, unsigned int offset, u8 *oiv);
167struct nx_sg *nx_walk_and_build(struct nx_sg *, unsigned int,
168 struct scatterlist *, unsigned int,
169 unsigned int *);
170
171#ifdef CONFIG_DEBUG_FS
172#define NX_DEBUGFS_INIT(drv) nx_debugfs_init(drv)
173#define NX_DEBUGFS_FINI(drv) nx_debugfs_fini(drv)
174
175void nx_debugfs_init(struct nx_crypto_driver *);
176void nx_debugfs_fini(struct nx_crypto_driver *);
177#else
178#define NX_DEBUGFS_INIT(drv) do {} while (0)
179#define NX_DEBUGFS_FINI(drv) do {} while (0)
180#endif
181
182#define NX_PAGE_NUM(x) ((u64)(x) & 0xfffffffffffff000ULL)
183
184extern struct skcipher_alg nx_cbc_aes_alg;
185extern struct skcipher_alg nx_ecb_aes_alg;
186extern struct aead_alg nx_gcm_aes_alg;
187extern struct aead_alg nx_gcm4106_aes_alg;
188extern struct skcipher_alg nx_ctr3686_aes_alg;
189extern struct aead_alg nx_ccm_aes_alg;
190extern struct aead_alg nx_ccm4309_aes_alg;
191extern struct shash_alg nx_shash_aes_xcbc_alg;
192extern struct shash_alg nx_shash_sha512_alg;
193extern struct shash_alg nx_shash_sha256_alg;
194
195extern struct nx_crypto_driver nx_driver;
196
197#endif