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2874c5fd | 1 | // SPDX-License-Identifier: GPL-2.0-or-later |
9fe757b0 | 2 | /* Copyright (C) 2004-2006, Advanced Micro Devices, Inc. |
24086e3d | 3 | */ |
9fe757b0 JC |
4 | |
5 | #include <linux/module.h> | |
6 | #include <linux/kernel.h> | |
9fe757b0 JC |
7 | #include <linux/pci.h> |
8 | #include <linux/pci_ids.h> | |
9 | #include <linux/crypto.h> | |
10 | #include <linux/spinlock.h> | |
11 | #include <crypto/algapi.h> | |
89e12654 | 12 | #include <crypto/aes.h> |
9fe757b0 | 13 | |
99700716 CC |
14 | #include <linux/io.h> |
15 | #include <linux/delay.h> | |
9fe757b0 JC |
16 | |
17 | #include "geode-aes.h" | |
18 | ||
9fe757b0 JC |
19 | /* Static structures */ |
20 | ||
99700716 | 21 | static void __iomem *_iobase; |
9fe757b0 JC |
22 | static spinlock_t lock; |
23 | ||
24 | /* Write a 128 bit field (either a writable key or IV) */ | |
25 | static inline void | |
26 | _writefield(u32 offset, void *value) | |
27 | { | |
28 | int i; | |
24086e3d | 29 | |
99700716 | 30 | for (i = 0; i < 4; i++) |
9fe757b0 JC |
31 | iowrite32(((u32 *) value)[i], _iobase + offset + (i * 4)); |
32 | } | |
33 | ||
34 | /* Read a 128 bit field (either a writable key or IV) */ | |
35 | static inline void | |
36 | _readfield(u32 offset, void *value) | |
37 | { | |
38 | int i; | |
24086e3d | 39 | |
99700716 | 40 | for (i = 0; i < 4; i++) |
9fe757b0 JC |
41 | ((u32 *) value)[i] = ioread32(_iobase + offset + (i * 4)); |
42 | } | |
43 | ||
44 | static int | |
45 | do_crypt(void *src, void *dst, int len, u32 flags) | |
46 | { | |
47 | u32 status; | |
48 | u32 counter = AES_OP_TIMEOUT; | |
49 | ||
50 | iowrite32(virt_to_phys(src), _iobase + AES_SOURCEA_REG); | |
51 | iowrite32(virt_to_phys(dst), _iobase + AES_DSTA_REG); | |
52 | iowrite32(len, _iobase + AES_LENA_REG); | |
53 | ||
54 | /* Start the operation */ | |
55 | iowrite32(AES_CTRL_START | flags, _iobase + AES_CTRLA_REG); | |
56 | ||
1f4e4773 | 57 | do { |
9fe757b0 | 58 | status = ioread32(_iobase + AES_INTR_REG); |
1f4e4773 | 59 | cpu_relax(); |
99700716 | 60 | } while (!(status & AES_INTRA_PENDING) && --counter); |
9fe757b0 JC |
61 | |
62 | /* Clear the event */ | |
63 | iowrite32((status & 0xFF) | AES_INTRA_PENDING, _iobase + AES_INTR_REG); | |
64 | return counter ? 0 : 1; | |
65 | } | |
66 | ||
ab782705 | 67 | static unsigned int |
9fe757b0 JC |
68 | geode_aes_crypt(struct geode_aes_op *op) |
69 | { | |
9fe757b0 | 70 | u32 flags = 0; |
5efee174 | 71 | unsigned long iflags; |
1f4e4773 | 72 | int ret; |
9fe757b0 | 73 | |
761e7846 | 74 | if (op->len == 0) |
9fe757b0 JC |
75 | return 0; |
76 | ||
761e7846 JC |
77 | /* If the source and destination is the same, then |
78 | * we need to turn on the coherent flags, otherwise | |
79 | * we don't need to worry | |
80 | */ | |
81 | ||
2e21630d | 82 | flags |= (AES_CTRL_DCA | AES_CTRL_SCA); |
9fe757b0 JC |
83 | |
84 | if (op->dir == AES_DIR_ENCRYPT) | |
85 | flags |= AES_CTRL_ENCRYPT; | |
86 | ||
87 | /* Start the critical section */ | |
88 | ||
89 | spin_lock_irqsave(&lock, iflags); | |
90 | ||
91 | if (op->mode == AES_MODE_CBC) { | |
92 | flags |= AES_CTRL_CBC; | |
93 | _writefield(AES_WRITEIV0_REG, op->iv); | |
94 | } | |
95 | ||
761e7846 | 96 | if (!(op->flags & AES_FLAGS_HIDDENKEY)) { |
9fe757b0 JC |
97 | flags |= AES_CTRL_WRKEY; |
98 | _writefield(AES_WRITEKEY0_REG, op->key); | |
99 | } | |
100 | ||
1f4e4773 SS |
101 | ret = do_crypt(op->src, op->dst, op->len, flags); |
102 | BUG_ON(ret); | |
9fe757b0 JC |
103 | |
104 | if (op->mode == AES_MODE_CBC) | |
105 | _readfield(AES_WRITEIV0_REG, op->iv); | |
106 | ||
107 | spin_unlock_irqrestore(&lock, iflags); | |
108 | ||
109 | return op->len; | |
110 | } | |
111 | ||
112 | /* CRYPTO-API Functions */ | |
113 | ||
cd7c3bfe SS |
114 | static int geode_setkey_cip(struct crypto_tfm *tfm, const u8 *key, |
115 | unsigned int len) | |
9fe757b0 JC |
116 | { |
117 | struct geode_aes_op *op = crypto_tfm_ctx(tfm); | |
cd7c3bfe SS |
118 | unsigned int ret; |
119 | ||
120 | op->keylen = len; | |
121 | ||
122 | if (len == AES_KEYSIZE_128) { | |
123 | memcpy(op->key, key, len); | |
124 | return 0; | |
125 | } | |
9fe757b0 | 126 | |
cd7c3bfe SS |
127 | if (len != AES_KEYSIZE_192 && len != AES_KEYSIZE_256) { |
128 | /* not supported at all */ | |
9fe757b0 JC |
129 | tfm->crt_flags |= CRYPTO_TFM_RES_BAD_KEY_LEN; |
130 | return -EINVAL; | |
131 | } | |
132 | ||
cd7c3bfe SS |
133 | /* |
134 | * The requested key size is not supported by HW, do a fallback | |
135 | */ | |
faad98f2 RK |
136 | op->fallback.cip->base.crt_flags &= ~CRYPTO_TFM_REQ_MASK; |
137 | op->fallback.cip->base.crt_flags |= (tfm->crt_flags & CRYPTO_TFM_REQ_MASK); | |
cd7c3bfe SS |
138 | |
139 | ret = crypto_cipher_setkey(op->fallback.cip, key, len); | |
140 | if (ret) { | |
141 | tfm->crt_flags &= ~CRYPTO_TFM_RES_MASK; | |
e054f164 | 142 | tfm->crt_flags |= (op->fallback.cip->base.crt_flags & CRYPTO_TFM_RES_MASK); |
cd7c3bfe SS |
143 | } |
144 | return ret; | |
145 | } | |
146 | ||
147 | static int geode_setkey_blk(struct crypto_tfm *tfm, const u8 *key, | |
148 | unsigned int len) | |
149 | { | |
150 | struct geode_aes_op *op = crypto_tfm_ctx(tfm); | |
151 | unsigned int ret; | |
152 | ||
153 | op->keylen = len; | |
154 | ||
155 | if (len == AES_KEYSIZE_128) { | |
156 | memcpy(op->key, key, len); | |
157 | return 0; | |
158 | } | |
159 | ||
160 | if (len != AES_KEYSIZE_192 && len != AES_KEYSIZE_256) { | |
161 | /* not supported at all */ | |
162 | tfm->crt_flags |= CRYPTO_TFM_RES_BAD_KEY_LEN; | |
163 | return -EINVAL; | |
164 | } | |
165 | ||
166 | /* | |
167 | * The requested key size is not supported by HW, do a fallback | |
168 | */ | |
169 | op->fallback.blk->base.crt_flags &= ~CRYPTO_TFM_REQ_MASK; | |
170 | op->fallback.blk->base.crt_flags |= (tfm->crt_flags & CRYPTO_TFM_REQ_MASK); | |
171 | ||
172 | ret = crypto_blkcipher_setkey(op->fallback.blk, key, len); | |
173 | if (ret) { | |
174 | tfm->crt_flags &= ~CRYPTO_TFM_RES_MASK; | |
175 | tfm->crt_flags |= (op->fallback.blk->base.crt_flags & CRYPTO_TFM_RES_MASK); | |
176 | } | |
177 | return ret; | |
178 | } | |
179 | ||
180 | static int fallback_blk_dec(struct blkcipher_desc *desc, | |
181 | struct scatterlist *dst, struct scatterlist *src, | |
182 | unsigned int nbytes) | |
183 | { | |
184 | unsigned int ret; | |
185 | struct crypto_blkcipher *tfm; | |
186 | struct geode_aes_op *op = crypto_blkcipher_ctx(desc->tfm); | |
187 | ||
188 | tfm = desc->tfm; | |
189 | desc->tfm = op->fallback.blk; | |
190 | ||
fdc520aa | 191 | ret = crypto_blkcipher_decrypt_iv(desc, dst, src, nbytes); |
cd7c3bfe SS |
192 | |
193 | desc->tfm = tfm; | |
194 | return ret; | |
195 | } | |
196 | static int fallback_blk_enc(struct blkcipher_desc *desc, | |
197 | struct scatterlist *dst, struct scatterlist *src, | |
198 | unsigned int nbytes) | |
199 | { | |
200 | unsigned int ret; | |
201 | struct crypto_blkcipher *tfm; | |
202 | struct geode_aes_op *op = crypto_blkcipher_ctx(desc->tfm); | |
203 | ||
204 | tfm = desc->tfm; | |
205 | desc->tfm = op->fallback.blk; | |
206 | ||
fdc520aa | 207 | ret = crypto_blkcipher_encrypt_iv(desc, dst, src, nbytes); |
cd7c3bfe SS |
208 | |
209 | desc->tfm = tfm; | |
210 | return ret; | |
9fe757b0 JC |
211 | } |
212 | ||
213 | static void | |
214 | geode_encrypt(struct crypto_tfm *tfm, u8 *out, const u8 *in) | |
215 | { | |
216 | struct geode_aes_op *op = crypto_tfm_ctx(tfm); | |
217 | ||
cd7c3bfe SS |
218 | if (unlikely(op->keylen != AES_KEYSIZE_128)) { |
219 | crypto_cipher_encrypt_one(op->fallback.cip, out, in); | |
9fe757b0 | 220 | return; |
cd7c3bfe | 221 | } |
9fe757b0 JC |
222 | |
223 | op->src = (void *) in; | |
224 | op->dst = (void *) out; | |
225 | op->mode = AES_MODE_ECB; | |
226 | op->flags = 0; | |
b9d865e3 | 227 | op->len = AES_BLOCK_SIZE; |
9fe757b0 JC |
228 | op->dir = AES_DIR_ENCRYPT; |
229 | ||
230 | geode_aes_crypt(op); | |
231 | } | |
232 | ||
233 | ||
234 | static void | |
235 | geode_decrypt(struct crypto_tfm *tfm, u8 *out, const u8 *in) | |
236 | { | |
237 | struct geode_aes_op *op = crypto_tfm_ctx(tfm); | |
238 | ||
cd7c3bfe SS |
239 | if (unlikely(op->keylen != AES_KEYSIZE_128)) { |
240 | crypto_cipher_decrypt_one(op->fallback.cip, out, in); | |
9fe757b0 | 241 | return; |
cd7c3bfe | 242 | } |
9fe757b0 JC |
243 | |
244 | op->src = (void *) in; | |
245 | op->dst = (void *) out; | |
246 | op->mode = AES_MODE_ECB; | |
247 | op->flags = 0; | |
b9d865e3 | 248 | op->len = AES_BLOCK_SIZE; |
9fe757b0 JC |
249 | op->dir = AES_DIR_DECRYPT; |
250 | ||
251 | geode_aes_crypt(op); | |
252 | } | |
253 | ||
cd7c3bfe SS |
254 | static int fallback_init_cip(struct crypto_tfm *tfm) |
255 | { | |
d207a38c | 256 | const char *name = crypto_tfm_alg_name(tfm); |
cd7c3bfe SS |
257 | struct geode_aes_op *op = crypto_tfm_ctx(tfm); |
258 | ||
259 | op->fallback.cip = crypto_alloc_cipher(name, 0, | |
1ad0f160 | 260 | CRYPTO_ALG_NEED_FALLBACK); |
cd7c3bfe SS |
261 | |
262 | if (IS_ERR(op->fallback.cip)) { | |
263 | printk(KERN_ERR "Error allocating fallback algo %s\n", name); | |
faad98f2 | 264 | return PTR_ERR(op->fallback.cip); |
cd7c3bfe SS |
265 | } |
266 | ||
267 | return 0; | |
268 | } | |
269 | ||
270 | static void fallback_exit_cip(struct crypto_tfm *tfm) | |
271 | { | |
272 | struct geode_aes_op *op = crypto_tfm_ctx(tfm); | |
273 | ||
274 | crypto_free_cipher(op->fallback.cip); | |
275 | op->fallback.cip = NULL; | |
276 | } | |
9fe757b0 JC |
277 | |
278 | static struct crypto_alg geode_alg = { | |
cd7c3bfe SS |
279 | .cra_name = "aes", |
280 | .cra_driver_name = "geode-aes", | |
281 | .cra_priority = 300, | |
282 | .cra_alignmask = 15, | |
283 | .cra_flags = CRYPTO_ALG_TYPE_CIPHER | | |
284 | CRYPTO_ALG_NEED_FALLBACK, | |
285 | .cra_init = fallback_init_cip, | |
286 | .cra_exit = fallback_exit_cip, | |
b9d865e3 | 287 | .cra_blocksize = AES_BLOCK_SIZE, |
9fe757b0 | 288 | .cra_ctxsize = sizeof(struct geode_aes_op), |
cd7c3bfe | 289 | .cra_module = THIS_MODULE, |
cd7c3bfe SS |
290 | .cra_u = { |
291 | .cipher = { | |
292 | .cia_min_keysize = AES_MIN_KEY_SIZE, | |
293 | .cia_max_keysize = AES_MAX_KEY_SIZE, | |
294 | .cia_setkey = geode_setkey_cip, | |
295 | .cia_encrypt = geode_encrypt, | |
296 | .cia_decrypt = geode_decrypt | |
9fe757b0 JC |
297 | } |
298 | } | |
299 | }; | |
300 | ||
301 | static int | |
302 | geode_cbc_decrypt(struct blkcipher_desc *desc, | |
303 | struct scatterlist *dst, struct scatterlist *src, | |
304 | unsigned int nbytes) | |
305 | { | |
306 | struct geode_aes_op *op = crypto_blkcipher_ctx(desc->tfm); | |
307 | struct blkcipher_walk walk; | |
308 | int err, ret; | |
309 | ||
cd7c3bfe SS |
310 | if (unlikely(op->keylen != AES_KEYSIZE_128)) |
311 | return fallback_blk_dec(desc, dst, src, nbytes); | |
312 | ||
9fe757b0 JC |
313 | blkcipher_walk_init(&walk, dst, src, nbytes); |
314 | err = blkcipher_walk_virt(desc, &walk); | |
d2456c66 | 315 | op->iv = walk.iv; |
9fe757b0 | 316 | |
99700716 | 317 | while ((nbytes = walk.nbytes)) { |
9fe757b0 JC |
318 | op->src = walk.src.virt.addr, |
319 | op->dst = walk.dst.virt.addr; | |
320 | op->mode = AES_MODE_CBC; | |
b9d865e3 | 321 | op->len = nbytes - (nbytes % AES_BLOCK_SIZE); |
9fe757b0 JC |
322 | op->dir = AES_DIR_DECRYPT; |
323 | ||
9fe757b0 JC |
324 | ret = geode_aes_crypt(op); |
325 | ||
9fe757b0 | 326 | nbytes -= ret; |
9fe757b0 JC |
327 | err = blkcipher_walk_done(desc, &walk, nbytes); |
328 | } | |
329 | ||
330 | return err; | |
331 | } | |
332 | ||
333 | static int | |
334 | geode_cbc_encrypt(struct blkcipher_desc *desc, | |
335 | struct scatterlist *dst, struct scatterlist *src, | |
336 | unsigned int nbytes) | |
337 | { | |
338 | struct geode_aes_op *op = crypto_blkcipher_ctx(desc->tfm); | |
339 | struct blkcipher_walk walk; | |
340 | int err, ret; | |
341 | ||
cd7c3bfe SS |
342 | if (unlikely(op->keylen != AES_KEYSIZE_128)) |
343 | return fallback_blk_enc(desc, dst, src, nbytes); | |
344 | ||
9fe757b0 JC |
345 | blkcipher_walk_init(&walk, dst, src, nbytes); |
346 | err = blkcipher_walk_virt(desc, &walk); | |
d2456c66 | 347 | op->iv = walk.iv; |
9fe757b0 | 348 | |
99700716 | 349 | while ((nbytes = walk.nbytes)) { |
9fe757b0 JC |
350 | op->src = walk.src.virt.addr, |
351 | op->dst = walk.dst.virt.addr; | |
352 | op->mode = AES_MODE_CBC; | |
b9d865e3 | 353 | op->len = nbytes - (nbytes % AES_BLOCK_SIZE); |
9fe757b0 JC |
354 | op->dir = AES_DIR_ENCRYPT; |
355 | ||
9fe757b0 JC |
356 | ret = geode_aes_crypt(op); |
357 | nbytes -= ret; | |
358 | err = blkcipher_walk_done(desc, &walk, nbytes); | |
359 | } | |
360 | ||
361 | return err; | |
362 | } | |
363 | ||
cd7c3bfe SS |
364 | static int fallback_init_blk(struct crypto_tfm *tfm) |
365 | { | |
d207a38c | 366 | const char *name = crypto_tfm_alg_name(tfm); |
cd7c3bfe SS |
367 | struct geode_aes_op *op = crypto_tfm_ctx(tfm); |
368 | ||
369 | op->fallback.blk = crypto_alloc_blkcipher(name, 0, | |
370 | CRYPTO_ALG_ASYNC | CRYPTO_ALG_NEED_FALLBACK); | |
371 | ||
372 | if (IS_ERR(op->fallback.blk)) { | |
373 | printk(KERN_ERR "Error allocating fallback algo %s\n", name); | |
374 | return PTR_ERR(op->fallback.blk); | |
375 | } | |
376 | ||
377 | return 0; | |
378 | } | |
379 | ||
380 | static void fallback_exit_blk(struct crypto_tfm *tfm) | |
381 | { | |
382 | struct geode_aes_op *op = crypto_tfm_ctx(tfm); | |
383 | ||
384 | crypto_free_blkcipher(op->fallback.blk); | |
385 | op->fallback.blk = NULL; | |
386 | } | |
387 | ||
9fe757b0 JC |
388 | static struct crypto_alg geode_cbc_alg = { |
389 | .cra_name = "cbc(aes)", | |
cd7c3bfe | 390 | .cra_driver_name = "cbc-aes-geode", |
9fe757b0 | 391 | .cra_priority = 400, |
cd7c3bfe | 392 | .cra_flags = CRYPTO_ALG_TYPE_BLKCIPHER | |
d912bb76 NM |
393 | CRYPTO_ALG_KERN_DRIVER_ONLY | |
394 | CRYPTO_ALG_NEED_FALLBACK, | |
cd7c3bfe SS |
395 | .cra_init = fallback_init_blk, |
396 | .cra_exit = fallback_exit_blk, | |
b9d865e3 | 397 | .cra_blocksize = AES_BLOCK_SIZE, |
9fe757b0 JC |
398 | .cra_ctxsize = sizeof(struct geode_aes_op), |
399 | .cra_alignmask = 15, | |
cd7c3bfe SS |
400 | .cra_type = &crypto_blkcipher_type, |
401 | .cra_module = THIS_MODULE, | |
cd7c3bfe SS |
402 | .cra_u = { |
403 | .blkcipher = { | |
404 | .min_keysize = AES_MIN_KEY_SIZE, | |
405 | .max_keysize = AES_MAX_KEY_SIZE, | |
406 | .setkey = geode_setkey_blk, | |
9fe757b0 JC |
407 | .encrypt = geode_cbc_encrypt, |
408 | .decrypt = geode_cbc_decrypt, | |
bac79a2a | 409 | .ivsize = AES_BLOCK_SIZE, |
9fe757b0 JC |
410 | } |
411 | } | |
412 | }; | |
413 | ||
414 | static int | |
415 | geode_ecb_decrypt(struct blkcipher_desc *desc, | |
416 | struct scatterlist *dst, struct scatterlist *src, | |
417 | unsigned int nbytes) | |
418 | { | |
419 | struct geode_aes_op *op = crypto_blkcipher_ctx(desc->tfm); | |
420 | struct blkcipher_walk walk; | |
421 | int err, ret; | |
422 | ||
cd7c3bfe SS |
423 | if (unlikely(op->keylen != AES_KEYSIZE_128)) |
424 | return fallback_blk_dec(desc, dst, src, nbytes); | |
425 | ||
9fe757b0 JC |
426 | blkcipher_walk_init(&walk, dst, src, nbytes); |
427 | err = blkcipher_walk_virt(desc, &walk); | |
428 | ||
99700716 | 429 | while ((nbytes = walk.nbytes)) { |
9fe757b0 JC |
430 | op->src = walk.src.virt.addr, |
431 | op->dst = walk.dst.virt.addr; | |
432 | op->mode = AES_MODE_ECB; | |
b9d865e3 | 433 | op->len = nbytes - (nbytes % AES_BLOCK_SIZE); |
9fe757b0 JC |
434 | op->dir = AES_DIR_DECRYPT; |
435 | ||
436 | ret = geode_aes_crypt(op); | |
437 | nbytes -= ret; | |
438 | err = blkcipher_walk_done(desc, &walk, nbytes); | |
439 | } | |
440 | ||
441 | return err; | |
442 | } | |
443 | ||
444 | static int | |
445 | geode_ecb_encrypt(struct blkcipher_desc *desc, | |
446 | struct scatterlist *dst, struct scatterlist *src, | |
447 | unsigned int nbytes) | |
448 | { | |
449 | struct geode_aes_op *op = crypto_blkcipher_ctx(desc->tfm); | |
450 | struct blkcipher_walk walk; | |
451 | int err, ret; | |
452 | ||
cd7c3bfe SS |
453 | if (unlikely(op->keylen != AES_KEYSIZE_128)) |
454 | return fallback_blk_enc(desc, dst, src, nbytes); | |
455 | ||
9fe757b0 JC |
456 | blkcipher_walk_init(&walk, dst, src, nbytes); |
457 | err = blkcipher_walk_virt(desc, &walk); | |
458 | ||
99700716 | 459 | while ((nbytes = walk.nbytes)) { |
9fe757b0 JC |
460 | op->src = walk.src.virt.addr, |
461 | op->dst = walk.dst.virt.addr; | |
462 | op->mode = AES_MODE_ECB; | |
b9d865e3 | 463 | op->len = nbytes - (nbytes % AES_BLOCK_SIZE); |
9fe757b0 JC |
464 | op->dir = AES_DIR_ENCRYPT; |
465 | ||
466 | ret = geode_aes_crypt(op); | |
467 | nbytes -= ret; | |
468 | ret = blkcipher_walk_done(desc, &walk, nbytes); | |
469 | } | |
470 | ||
471 | return err; | |
472 | } | |
473 | ||
474 | static struct crypto_alg geode_ecb_alg = { | |
cd7c3bfe SS |
475 | .cra_name = "ecb(aes)", |
476 | .cra_driver_name = "ecb-aes-geode", | |
9fe757b0 | 477 | .cra_priority = 400, |
cd7c3bfe | 478 | .cra_flags = CRYPTO_ALG_TYPE_BLKCIPHER | |
d912bb76 NM |
479 | CRYPTO_ALG_KERN_DRIVER_ONLY | |
480 | CRYPTO_ALG_NEED_FALLBACK, | |
cd7c3bfe SS |
481 | .cra_init = fallback_init_blk, |
482 | .cra_exit = fallback_exit_blk, | |
b9d865e3 | 483 | .cra_blocksize = AES_BLOCK_SIZE, |
9fe757b0 JC |
484 | .cra_ctxsize = sizeof(struct geode_aes_op), |
485 | .cra_alignmask = 15, | |
cd7c3bfe SS |
486 | .cra_type = &crypto_blkcipher_type, |
487 | .cra_module = THIS_MODULE, | |
cd7c3bfe SS |
488 | .cra_u = { |
489 | .blkcipher = { | |
490 | .min_keysize = AES_MIN_KEY_SIZE, | |
491 | .max_keysize = AES_MAX_KEY_SIZE, | |
492 | .setkey = geode_setkey_blk, | |
9fe757b0 JC |
493 | .encrypt = geode_ecb_encrypt, |
494 | .decrypt = geode_ecb_decrypt, | |
495 | } | |
496 | } | |
497 | }; | |
498 | ||
49cfe4db | 499 | static void geode_aes_remove(struct pci_dev *dev) |
9fe757b0 JC |
500 | { |
501 | crypto_unregister_alg(&geode_alg); | |
502 | crypto_unregister_alg(&geode_ecb_alg); | |
503 | crypto_unregister_alg(&geode_cbc_alg); | |
504 | ||
505 | pci_iounmap(dev, _iobase); | |
506 | _iobase = NULL; | |
507 | ||
508 | pci_release_regions(dev); | |
509 | pci_disable_device(dev); | |
510 | } | |
511 | ||
512 | ||
49cfe4db | 513 | static int geode_aes_probe(struct pci_dev *dev, const struct pci_device_id *id) |
9fe757b0 JC |
514 | { |
515 | int ret; | |
24086e3d | 516 | |
99700716 CC |
517 | ret = pci_enable_device(dev); |
518 | if (ret) | |
9fe757b0 JC |
519 | return ret; |
520 | ||
99700716 CC |
521 | ret = pci_request_regions(dev, "geode-aes"); |
522 | if (ret) | |
9fe757b0 JC |
523 | goto eenable; |
524 | ||
525 | _iobase = pci_iomap(dev, 0, 0); | |
526 | ||
527 | if (_iobase == NULL) { | |
528 | ret = -ENOMEM; | |
529 | goto erequest; | |
530 | } | |
531 | ||
532 | spin_lock_init(&lock); | |
533 | ||
534 | /* Clear any pending activity */ | |
535 | iowrite32(AES_INTR_PENDING | AES_INTR_MASK, _iobase + AES_INTR_REG); | |
536 | ||
99700716 CC |
537 | ret = crypto_register_alg(&geode_alg); |
538 | if (ret) | |
9fe757b0 JC |
539 | goto eiomap; |
540 | ||
99700716 CC |
541 | ret = crypto_register_alg(&geode_ecb_alg); |
542 | if (ret) | |
9fe757b0 JC |
543 | goto ealg; |
544 | ||
99700716 CC |
545 | ret = crypto_register_alg(&geode_cbc_alg); |
546 | if (ret) | |
9fe757b0 JC |
547 | goto eecb; |
548 | ||
701bcbc1 | 549 | dev_notice(&dev->dev, "GEODE AES engine enabled.\n"); |
9fe757b0 JC |
550 | return 0; |
551 | ||
552 | eecb: | |
553 | crypto_unregister_alg(&geode_ecb_alg); | |
554 | ||
555 | ealg: | |
556 | crypto_unregister_alg(&geode_alg); | |
557 | ||
558 | eiomap: | |
559 | pci_iounmap(dev, _iobase); | |
560 | ||
561 | erequest: | |
562 | pci_release_regions(dev); | |
563 | ||
564 | eenable: | |
565 | pci_disable_device(dev); | |
566 | ||
701bcbc1 | 567 | dev_err(&dev->dev, "GEODE AES initialization failed.\n"); |
9fe757b0 JC |
568 | return ret; |
569 | } | |
570 | ||
571 | static struct pci_device_id geode_aes_tbl[] = { | |
24086e3d | 572 | { PCI_VDEVICE(AMD, PCI_DEVICE_ID_AMD_LX_AES), }, |
9fe757b0 JC |
573 | { 0, } |
574 | }; | |
575 | ||
576 | MODULE_DEVICE_TABLE(pci, geode_aes_tbl); | |
577 | ||
578 | static struct pci_driver geode_aes_driver = { | |
579 | .name = "Geode LX AES", | |
580 | .id_table = geode_aes_tbl, | |
581 | .probe = geode_aes_probe, | |
49cfe4db | 582 | .remove = geode_aes_remove, |
9fe757b0 JC |
583 | }; |
584 | ||
49d30d3d | 585 | module_pci_driver(geode_aes_driver); |
9fe757b0 JC |
586 | |
587 | MODULE_AUTHOR("Advanced Micro Devices, Inc."); | |
588 | MODULE_DESCRIPTION("Geode LX Hardware AES driver"); | |
589 | MODULE_LICENSE("GPL"); |