1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22#include <crypto/aes.h>
23#include <crypto/algapi.h>
24#include <linux/module.h>
25#include <linux/types.h>
26#include <linux/crypto.h>
27#include <asm/vio.h>
28
29#include "nx_csbcpb.h"
30#include "nx.h"
31
32
33static int ecb_aes_nx_set_key(struct crypto_tfm *tfm,
34 const u8 *in_key,
35 unsigned int key_len)
36{
37 struct nx_crypto_ctx *nx_ctx = crypto_tfm_ctx(tfm);
38 struct nx_csbcpb *csbcpb = (struct nx_csbcpb *)nx_ctx->csbcpb;
39
40 nx_ctx_init(nx_ctx, HCOP_FC_AES);
41
42 switch (key_len) {
43 case AES_KEYSIZE_128:
44 NX_CPB_SET_KEY_SIZE(csbcpb, NX_KS_AES_128);
45 nx_ctx->ap = &nx_ctx->props[NX_PROPS_AES_128];
46 break;
47 case AES_KEYSIZE_192:
48 NX_CPB_SET_KEY_SIZE(csbcpb, NX_KS_AES_192);
49 nx_ctx->ap = &nx_ctx->props[NX_PROPS_AES_192];
50 break;
51 case AES_KEYSIZE_256:
52 NX_CPB_SET_KEY_SIZE(csbcpb, NX_KS_AES_256);
53 nx_ctx->ap = &nx_ctx->props[NX_PROPS_AES_256];
54 break;
55 default:
56 return -EINVAL;
57 }
58
59 csbcpb->cpb.hdr.mode = NX_MODE_AES_ECB;
60 memcpy(csbcpb->cpb.aes_ecb.key, in_key, key_len);
61
62 return 0;
63}
64
65static int ecb_aes_nx_crypt(struct blkcipher_desc *desc,
66 struct scatterlist *dst,
67 struct scatterlist *src,
68 unsigned int nbytes,
69 int enc)
70{
71 struct nx_crypto_ctx *nx_ctx = crypto_blkcipher_ctx(desc->tfm);
72 struct nx_csbcpb *csbcpb = nx_ctx->csbcpb;
73 unsigned long irq_flags;
74 unsigned int processed = 0, to_process;
75 int rc;
76
77 spin_lock_irqsave(&nx_ctx->lock, irq_flags);
78
79 if (enc)
80 NX_CPB_FDM(csbcpb) |= NX_FDM_ENDE_ENCRYPT;
81 else
82 NX_CPB_FDM(csbcpb) &= ~NX_FDM_ENDE_ENCRYPT;
83
84 do {
85 to_process = nbytes - processed;
86
87 rc = nx_build_sg_lists(nx_ctx, desc, dst, src, &to_process,
88 processed, NULL);
89 if (rc)
90 goto out;
91
92 if (!nx_ctx->op.inlen || !nx_ctx->op.outlen) {
93 rc = -EINVAL;
94 goto out;
95 }
96
97 rc = nx_hcall_sync(nx_ctx, &nx_ctx->op,
98 desc->flags & CRYPTO_TFM_REQ_MAY_SLEEP);
99 if (rc)
100 goto out;
101
102 atomic_inc(&(nx_ctx->stats->aes_ops));
103 atomic64_add(csbcpb->csb.processed_byte_count,
104 &(nx_ctx->stats->aes_bytes));
105
106 processed += to_process;
107 } while (processed < nbytes);
108
109out:
110 spin_unlock_irqrestore(&nx_ctx->lock, irq_flags);
111 return rc;
112}
113
114static int ecb_aes_nx_encrypt(struct blkcipher_desc *desc,
115 struct scatterlist *dst,
116 struct scatterlist *src,
117 unsigned int nbytes)
118{
119 return ecb_aes_nx_crypt(desc, dst, src, nbytes, 1);
120}
121
122static int ecb_aes_nx_decrypt(struct blkcipher_desc *desc,
123 struct scatterlist *dst,
124 struct scatterlist *src,
125 unsigned int nbytes)
126{
127 return ecb_aes_nx_crypt(desc, dst, src, nbytes, 0);
128}
129
130struct crypto_alg nx_ecb_aes_alg = {
131 .cra_name = "ecb(aes)",
132 .cra_driver_name = "ecb-aes-nx",
133 .cra_priority = 300,
134 .cra_flags = CRYPTO_ALG_TYPE_BLKCIPHER,
135 .cra_blocksize = AES_BLOCK_SIZE,
136 .cra_alignmask = 0xf,
137 .cra_ctxsize = sizeof(struct nx_crypto_ctx),
138 .cra_type = &crypto_blkcipher_type,
139 .cra_module = THIS_MODULE,
140 .cra_init = nx_crypto_ctx_aes_ecb_init,
141 .cra_exit = nx_crypto_ctx_exit,
142 .cra_blkcipher = {
143 .min_keysize = AES_MIN_KEY_SIZE,
144 .max_keysize = AES_MAX_KEY_SIZE,
145 .setkey = ecb_aes_nx_set_key,
146 .encrypt = ecb_aes_nx_encrypt,
147 .decrypt = ecb_aes_nx_decrypt,
148 }
149};
150
