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-rw-r--r--arch/sparc/crypto/aes_glue.c477
1 files changed, 477 insertions, 0 deletions
diff --git a/arch/sparc/crypto/aes_glue.c b/arch/sparc/crypto/aes_glue.c
new file mode 100644
index 000000000000..8f1c9980f637
--- /dev/null
+++ b/arch/sparc/crypto/aes_glue.c
@@ -0,0 +1,477 @@
1/* Glue code for AES encryption optimized for sparc64 crypto opcodes.
2 *
3 * This is based largely upon arch/x86/crypto/aesni-intel_glue.c
4 *
5 * Copyright (C) 2008, Intel Corp.
6 * Author: Huang Ying <ying.huang@intel.com>
7 *
8 * Added RFC4106 AES-GCM support for 128-bit keys under the AEAD
9 * interface for 64-bit kernels.
10 * Authors: Adrian Hoban <adrian.hoban@intel.com>
11 * Gabriele Paoloni <gabriele.paoloni@intel.com>
12 * Tadeusz Struk (tadeusz.struk@intel.com)
13 * Aidan O'Mahony (aidan.o.mahony@intel.com)
14 * Copyright (c) 2010, Intel Corporation.
15 */
16
17#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
18
19#include <linux/crypto.h>
20#include <linux/init.h>
21#include <linux/module.h>
22#include <linux/mm.h>
23#include <linux/types.h>
24#include <crypto/algapi.h>
25#include <crypto/aes.h>
26
27#include <asm/fpumacro.h>
28#include <asm/pstate.h>
29#include <asm/elf.h>
30
31#include "opcodes.h"
32
33struct aes_ops {
34 void (*encrypt)(const u64 *key, const u32 *input, u32 *output);
35 void (*decrypt)(const u64 *key, const u32 *input, u32 *output);
36 void (*load_encrypt_keys)(const u64 *key);
37 void (*load_decrypt_keys)(const u64 *key);
38 void (*ecb_encrypt)(const u64 *key, const u64 *input, u64 *output,
39 unsigned int len);
40 void (*ecb_decrypt)(const u64 *key, const u64 *input, u64 *output,
41 unsigned int len);
42 void (*cbc_encrypt)(const u64 *key, const u64 *input, u64 *output,
43 unsigned int len, u64 *iv);
44 void (*cbc_decrypt)(const u64 *key, const u64 *input, u64 *output,
45 unsigned int len, u64 *iv);
46 void (*ctr_crypt)(const u64 *key, const u64 *input, u64 *output,
47 unsigned int len, u64 *iv);
48};
49
50struct crypto_sparc64_aes_ctx {
51 struct aes_ops *ops;
52 u64 key[AES_MAX_KEYLENGTH / sizeof(u64)];
53 u32 key_length;
54 u32 expanded_key_length;
55};
56
57extern void aes_sparc64_encrypt_128(const u64 *key, const u32 *input,
58 u32 *output);
59extern void aes_sparc64_encrypt_192(const u64 *key, const u32 *input,
60 u32 *output);
61extern void aes_sparc64_encrypt_256(const u64 *key, const u32 *input,
62 u32 *output);
63
64extern void aes_sparc64_decrypt_128(const u64 *key, const u32 *input,
65 u32 *output);
66extern void aes_sparc64_decrypt_192(const u64 *key, const u32 *input,
67 u32 *output);
68extern void aes_sparc64_decrypt_256(const u64 *key, const u32 *input,
69 u32 *output);
70
71extern void aes_sparc64_load_encrypt_keys_128(const u64 *key);
72extern void aes_sparc64_load_encrypt_keys_192(const u64 *key);
73extern void aes_sparc64_load_encrypt_keys_256(const u64 *key);
74
75extern void aes_sparc64_load_decrypt_keys_128(const u64 *key);
76extern void aes_sparc64_load_decrypt_keys_192(const u64 *key);
77extern void aes_sparc64_load_decrypt_keys_256(const u64 *key);
78
79extern void aes_sparc64_ecb_encrypt_128(const u64 *key, const u64 *input,
80 u64 *output, unsigned int len);
81extern void aes_sparc64_ecb_encrypt_192(const u64 *key, const u64 *input,
82 u64 *output, unsigned int len);
83extern void aes_sparc64_ecb_encrypt_256(const u64 *key, const u64 *input,
84 u64 *output, unsigned int len);
85
86extern void aes_sparc64_ecb_decrypt_128(const u64 *key, const u64 *input,
87 u64 *output, unsigned int len);
88extern void aes_sparc64_ecb_decrypt_192(const u64 *key, const u64 *input,
89 u64 *output, unsigned int len);
90extern void aes_sparc64_ecb_decrypt_256(const u64 *key, const u64 *input,
91 u64 *output, unsigned int len);
92
93extern void aes_sparc64_cbc_encrypt_128(const u64 *key, const u64 *input,
94 u64 *output, unsigned int len,
95 u64 *iv);
96
97extern void aes_sparc64_cbc_encrypt_192(const u64 *key, const u64 *input,
98 u64 *output, unsigned int len,
99 u64 *iv);
100
101extern void aes_sparc64_cbc_encrypt_256(const u64 *key, const u64 *input,
102 u64 *output, unsigned int len,
103 u64 *iv);
104
105extern void aes_sparc64_cbc_decrypt_128(const u64 *key, const u64 *input,
106 u64 *output, unsigned int len,
107 u64 *iv);
108
109extern void aes_sparc64_cbc_decrypt_192(const u64 *key, const u64 *input,
110 u64 *output, unsigned int len,
111 u64 *iv);
112
113extern void aes_sparc64_cbc_decrypt_256(const u64 *key, const u64 *input,
114 u64 *output, unsigned int len,
115 u64 *iv);
116
117extern void aes_sparc64_ctr_crypt_128(const u64 *key, const u64 *input,
118 u64 *output, unsigned int len,
119 u64 *iv);
120extern void aes_sparc64_ctr_crypt_192(const u64 *key, const u64 *input,
121 u64 *output, unsigned int len,
122 u64 *iv);
123extern void aes_sparc64_ctr_crypt_256(const u64 *key, const u64 *input,
124 u64 *output, unsigned int len,
125 u64 *iv);
126
127struct aes_ops aes128_ops = {
128 .encrypt = aes_sparc64_encrypt_128,
129 .decrypt = aes_sparc64_decrypt_128,
130 .load_encrypt_keys = aes_sparc64_load_encrypt_keys_128,
131 .load_decrypt_keys = aes_sparc64_load_decrypt_keys_128,
132 .ecb_encrypt = aes_sparc64_ecb_encrypt_128,
133 .ecb_decrypt = aes_sparc64_ecb_decrypt_128,
134 .cbc_encrypt = aes_sparc64_cbc_encrypt_128,
135 .cbc_decrypt = aes_sparc64_cbc_decrypt_128,
136 .ctr_crypt = aes_sparc64_ctr_crypt_128,
137};
138
139struct aes_ops aes192_ops = {
140 .encrypt = aes_sparc64_encrypt_192,
141 .decrypt = aes_sparc64_decrypt_192,
142 .load_encrypt_keys = aes_sparc64_load_encrypt_keys_192,
143 .load_decrypt_keys = aes_sparc64_load_decrypt_keys_192,
144 .ecb_encrypt = aes_sparc64_ecb_encrypt_192,
145 .ecb_decrypt = aes_sparc64_ecb_decrypt_192,
146 .cbc_encrypt = aes_sparc64_cbc_encrypt_192,
147 .cbc_decrypt = aes_sparc64_cbc_decrypt_192,
148 .ctr_crypt = aes_sparc64_ctr_crypt_192,
149};
150
151struct aes_ops aes256_ops = {
152 .encrypt = aes_sparc64_encrypt_256,
153 .decrypt = aes_sparc64_decrypt_256,
154 .load_encrypt_keys = aes_sparc64_load_encrypt_keys_256,
155 .load_decrypt_keys = aes_sparc64_load_decrypt_keys_256,
156 .ecb_encrypt = aes_sparc64_ecb_encrypt_256,
157 .ecb_decrypt = aes_sparc64_ecb_decrypt_256,
158 .cbc_encrypt = aes_sparc64_cbc_encrypt_256,
159 .cbc_decrypt = aes_sparc64_cbc_decrypt_256,
160 .ctr_crypt = aes_sparc64_ctr_crypt_256,
161};
162
163extern void aes_sparc64_key_expand(const u32 *in_key, u64 *output_key,
164 unsigned int key_len);
165
166static int aes_set_key(struct crypto_tfm *tfm, const u8 *in_key,
167 unsigned int key_len)
168{
169 struct crypto_sparc64_aes_ctx *ctx = crypto_tfm_ctx(tfm);
170 u32 *flags = &tfm->crt_flags;
171
172 switch (key_len) {
173 case AES_KEYSIZE_128:
174 ctx->expanded_key_length = 0xb0;
175 ctx->ops = &aes128_ops;
176 break;
177
178 case AES_KEYSIZE_192:
179 ctx->expanded_key_length = 0xd0;
180 ctx->ops = &aes192_ops;
181 break;
182
183 case AES_KEYSIZE_256:
184 ctx->expanded_key_length = 0xf0;
185 ctx->ops = &aes256_ops;
186 break;
187
188 default:
189 *flags |= CRYPTO_TFM_RES_BAD_KEY_LEN;
190 return -EINVAL;
191 }
192
193 aes_sparc64_key_expand((const u32 *)in_key, &ctx->key[0], key_len);
194 ctx->key_length = key_len;
195
196 return 0;
197}
198
199static void aes_encrypt(struct crypto_tfm *tfm, u8 *dst, const u8 *src)
200{
201 struct crypto_sparc64_aes_ctx *ctx = crypto_tfm_ctx(tfm);
202
203 ctx->ops->encrypt(&ctx->key[0], (const u32 *) src, (u32 *) dst);
204}
205
206static void aes_decrypt(struct crypto_tfm *tfm, u8 *dst, const u8 *src)
207{
208 struct crypto_sparc64_aes_ctx *ctx = crypto_tfm_ctx(tfm);
209
210 ctx->ops->decrypt(&ctx->key[0], (const u32 *) src, (u32 *) dst);
211}
212
213#define AES_BLOCK_MASK (~(AES_BLOCK_SIZE-1))
214
215static int ecb_encrypt(struct blkcipher_desc *desc,
216 struct scatterlist *dst, struct scatterlist *src,
217 unsigned int nbytes)
218{
219 struct crypto_sparc64_aes_ctx *ctx = crypto_blkcipher_ctx(desc->tfm);
220 struct blkcipher_walk walk;
221 int err;
222
223 blkcipher_walk_init(&walk, dst, src, nbytes);
224 err = blkcipher_walk_virt(desc, &walk);
225
226 ctx->ops->load_encrypt_keys(&ctx->key[0]);
227 while ((nbytes = walk.nbytes)) {
228 unsigned int block_len = nbytes & AES_BLOCK_MASK;
229
230 if (likely(block_len)) {
231 ctx->ops->ecb_encrypt(&ctx->key[0],
232 (const u64 *)walk.src.virt.addr,
233 (u64 *) walk.dst.virt.addr,
234 block_len);
235 }
236 nbytes &= AES_BLOCK_SIZE - 1;
237 err = blkcipher_walk_done(desc, &walk, nbytes);
238 }
239 fprs_write(0);
240 return err;
241}
242
243static int ecb_decrypt(struct blkcipher_desc *desc,
244 struct scatterlist *dst, struct scatterlist *src,
245 unsigned int nbytes)
246{
247 struct crypto_sparc64_aes_ctx *ctx = crypto_blkcipher_ctx(desc->tfm);
248 struct blkcipher_walk walk;
249 u64 *key_end;
250 int err;
251
252 blkcipher_walk_init(&walk, dst, src, nbytes);
253 err = blkcipher_walk_virt(desc, &walk);
254
255 ctx->ops->load_decrypt_keys(&ctx->key[0]);
256 key_end = &ctx->key[ctx->expanded_key_length / sizeof(u64)];
257 while ((nbytes = walk.nbytes)) {
258 unsigned int block_len = nbytes & AES_BLOCK_MASK;
259
260 if (likely(block_len)) {
261 ctx->ops->ecb_decrypt(key_end,
262 (const u64 *) walk.src.virt.addr,
263 (u64 *) walk.dst.virt.addr, block_len);
264 }
265 nbytes &= AES_BLOCK_SIZE - 1;
266 err = blkcipher_walk_done(desc, &walk, nbytes);
267 }
268 fprs_write(0);
269
270 return err;
271}
272
273static int cbc_encrypt(struct blkcipher_desc *desc,
274 struct scatterlist *dst, struct scatterlist *src,
275 unsigned int nbytes)
276{
277 struct crypto_sparc64_aes_ctx *ctx = crypto_blkcipher_ctx(desc->tfm);
278 struct blkcipher_walk walk;
279 int err;
280
281 blkcipher_walk_init(&walk, dst, src, nbytes);
282 err = blkcipher_walk_virt(desc, &walk);
283
284 ctx->ops->load_encrypt_keys(&ctx->key[0]);
285 while ((nbytes = walk.nbytes)) {
286 unsigned int block_len = nbytes & AES_BLOCK_MASK;
287
288 if (likely(block_len)) {
289 ctx->ops->cbc_encrypt(&ctx->key[0],
290 (const u64 *)walk.src.virt.addr,
291 (u64 *) walk.dst.virt.addr,
292 block_len, (u64 *) walk.iv);
293 }
294 nbytes &= AES_BLOCK_SIZE - 1;
295 err = blkcipher_walk_done(desc, &walk, nbytes);
296 }
297 fprs_write(0);
298 return err;
299}
300
301static int cbc_decrypt(struct blkcipher_desc *desc,
302 struct scatterlist *dst, struct scatterlist *src,
303 unsigned int nbytes)
304{
305 struct crypto_sparc64_aes_ctx *ctx = crypto_blkcipher_ctx(desc->tfm);
306 struct blkcipher_walk walk;
307 u64 *key_end;
308 int err;
309
310 blkcipher_walk_init(&walk, dst, src, nbytes);
311 err = blkcipher_walk_virt(desc, &walk);
312
313 ctx->ops->load_decrypt_keys(&ctx->key[0]);
314 key_end = &ctx->key[ctx->expanded_key_length / sizeof(u64)];
315 while ((nbytes = walk.nbytes)) {
316 unsigned int block_len = nbytes & AES_BLOCK_MASK;
317
318 if (likely(block_len)) {
319 ctx->ops->cbc_decrypt(key_end,
320 (const u64 *) walk.src.virt.addr,
321 (u64 *) walk.dst.virt.addr,
322 block_len, (u64 *) walk.iv);
323 }
324 nbytes &= AES_BLOCK_SIZE - 1;
325 err = blkcipher_walk_done(desc, &walk, nbytes);
326 }
327 fprs_write(0);
328
329 return err;
330}
331
332static int ctr_crypt(struct blkcipher_desc *desc,
333 struct scatterlist *dst, struct scatterlist *src,
334 unsigned int nbytes)
335{
336 struct crypto_sparc64_aes_ctx *ctx = crypto_blkcipher_ctx(desc->tfm);
337 struct blkcipher_walk walk;
338 int err;
339
340 blkcipher_walk_init(&walk, dst, src, nbytes);
341 err = blkcipher_walk_virt(desc, &walk);
342
343 ctx->ops->load_encrypt_keys(&ctx->key[0]);
344 while ((nbytes = walk.nbytes)) {
345 unsigned int block_len = nbytes & AES_BLOCK_MASK;
346
347 if (likely(block_len)) {
348 ctx->ops->ctr_crypt(&ctx->key[0],
349 (const u64 *)walk.src.virt.addr,
350 (u64 *) walk.dst.virt.addr,
351 block_len, (u64 *) walk.iv);
352 }
353 nbytes &= AES_BLOCK_SIZE - 1;
354 err = blkcipher_walk_done(desc, &walk, nbytes);
355 }
356 fprs_write(0);
357 return err;
358}
359
360static struct crypto_alg algs[] = { {
361 .cra_name = "aes",
362 .cra_driver_name = "aes-sparc64",
363 .cra_priority = SPARC_CR_OPCODE_PRIORITY,
364 .cra_flags = CRYPTO_ALG_TYPE_CIPHER,
365 .cra_blocksize = AES_BLOCK_SIZE,
366 .cra_ctxsize = sizeof(struct crypto_sparc64_aes_ctx),
367 .cra_alignmask = 3,
368 .cra_module = THIS_MODULE,
369 .cra_u = {
370 .cipher = {
371 .cia_min_keysize = AES_MIN_KEY_SIZE,
372 .cia_max_keysize = AES_MAX_KEY_SIZE,
373 .cia_setkey = aes_set_key,
374 .cia_encrypt = aes_encrypt,
375 .cia_decrypt = aes_decrypt
376 }
377 }
378}, {
379 .cra_name = "ecb(aes)",
380 .cra_driver_name = "ecb-aes-sparc64",
381 .cra_priority = SPARC_CR_OPCODE_PRIORITY,
382 .cra_flags = CRYPTO_ALG_TYPE_BLKCIPHER,
383 .cra_blocksize = AES_BLOCK_SIZE,
384 .cra_ctxsize = sizeof(struct crypto_sparc64_aes_ctx),
385 .cra_alignmask = 7,
386 .cra_type = &crypto_blkcipher_type,
387 .cra_module = THIS_MODULE,
388 .cra_u = {
389 .blkcipher = {
390 .min_keysize = AES_MIN_KEY_SIZE,
391 .max_keysize = AES_MAX_KEY_SIZE,
392 .setkey = aes_set_key,
393 .encrypt = ecb_encrypt,
394 .decrypt = ecb_decrypt,
395 },
396 },
397}, {
398 .cra_name = "cbc(aes)",
399 .cra_driver_name = "cbc-aes-sparc64",
400 .cra_priority = SPARC_CR_OPCODE_PRIORITY,
401 .cra_flags = CRYPTO_ALG_TYPE_BLKCIPHER,
402 .cra_blocksize = AES_BLOCK_SIZE,
403 .cra_ctxsize = sizeof(struct crypto_sparc64_aes_ctx),
404 .cra_alignmask = 7,
405 .cra_type = &crypto_blkcipher_type,
406 .cra_module = THIS_MODULE,
407 .cra_u = {
408 .blkcipher = {
409 .min_keysize = AES_MIN_KEY_SIZE,
410 .max_keysize = AES_MAX_KEY_SIZE,
411 .setkey = aes_set_key,
412 .encrypt = cbc_encrypt,
413 .decrypt = cbc_decrypt,
414 },
415 },
416}, {
417 .cra_name = "ctr(aes)",
418 .cra_driver_name = "ctr-aes-sparc64",
419 .cra_priority = SPARC_CR_OPCODE_PRIORITY,
420 .cra_flags = CRYPTO_ALG_TYPE_BLKCIPHER,
421 .cra_blocksize = AES_BLOCK_SIZE,
422 .cra_ctxsize = sizeof(struct crypto_sparc64_aes_ctx),
423 .cra_alignmask = 7,
424 .cra_type = &crypto_blkcipher_type,
425 .cra_module = THIS_MODULE,
426 .cra_u = {
427 .blkcipher = {
428 .min_keysize = AES_MIN_KEY_SIZE,
429 .max_keysize = AES_MAX_KEY_SIZE,
430 .setkey = aes_set_key,
431 .encrypt = ctr_crypt,
432 .decrypt = ctr_crypt,
433 },
434 },
435} };
436
437static bool __init sparc64_has_aes_opcode(void)
438{
439 unsigned long cfr;
440
441 if (!(sparc64_elf_hwcap & HWCAP_SPARC_CRYPTO))
442 return false;
443
444 __asm__ __volatile__("rd %%asr26, %0" : "=r" (cfr));
445 if (!(cfr & CFR_AES))
446 return false;
447
448 return true;
449}
450
451static int __init aes_sparc64_mod_init(void)
452{
453 int i;
454
455 for (i = 0; i < ARRAY_SIZE(algs); i++)
456 INIT_LIST_HEAD(&algs[i].cra_list);
457
458 if (sparc64_has_aes_opcode()) {
459 pr_info("Using sparc64 aes opcodes optimized AES implementation\n");
460 return crypto_register_algs(algs, ARRAY_SIZE(algs));
461 }
462 pr_info("sparc64 aes opcodes not available.\n");
463 return -ENODEV;
464}
465
466static void __exit aes_sparc64_mod_fini(void)
467{
468 crypto_unregister_algs(algs, ARRAY_SIZE(algs));
469}
470
471module_init(aes_sparc64_mod_init);
472module_exit(aes_sparc64_mod_fini);
473
474MODULE_LICENSE("GPL");
475MODULE_DESCRIPTION("AES Secure Hash Algorithm, sparc64 aes opcode accelerated");
476
477MODULE_ALIAS("aes");
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