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85a7f0ac SAS |
1 | /* |
2 | * Support for Marvell's crypto engine which can be found on some Orion5X | |
3 | * boards. | |
4 | * | |
5 | * Author: Sebastian Andrzej Siewior < sebastian at breakpoint dot cc > | |
6 | * License: GPLv2 | |
7 | * | |
8 | */ | |
9 | #include <crypto/aes.h> | |
10 | #include <crypto/algapi.h> | |
11 | #include <linux/crypto.h> | |
12 | #include <linux/interrupt.h> | |
13 | #include <linux/io.h> | |
14 | #include <linux/kthread.h> | |
15 | #include <linux/platform_device.h> | |
16 | #include <linux/scatterlist.h> | |
5a0e3ad6 | 17 | #include <linux/slab.h> |
750052dd US |
18 | #include <crypto/internal/hash.h> |
19 | #include <crypto/sha.h> | |
85a7f0ac SAS |
20 | |
21 | #include "mv_cesa.h" | |
750052dd US |
22 | |
23 | #define MV_CESA "MV-CESA:" | |
24 | #define MAX_HW_HASH_SIZE 0xFFFF | |
25 | ||
85a7f0ac SAS |
26 | /* |
27 | * STM: | |
28 | * /---------------------------------------\ | |
29 | * | | request complete | |
30 | * \./ | | |
31 | * IDLE -> new request -> BUSY -> done -> DEQUEUE | |
32 | * /°\ | | |
33 | * | | more scatter entries | |
34 | * \________________/ | |
35 | */ | |
36 | enum engine_status { | |
37 | ENGINE_IDLE, | |
38 | ENGINE_BUSY, | |
39 | ENGINE_W_DEQUEUE, | |
40 | }; | |
41 | ||
42 | /** | |
43 | * struct req_progress - used for every crypt request | |
44 | * @src_sg_it: sg iterator for src | |
45 | * @dst_sg_it: sg iterator for dst | |
46 | * @sg_src_left: bytes left in src to process (scatter list) | |
47 | * @src_start: offset to add to src start position (scatter list) | |
750052dd | 48 | * @crypt_len: length of current hw crypt/hash process |
3b61a905 | 49 | * @hw_nbytes: total bytes to process in hw for this request |
f0d03dea | 50 | * @copy_back: whether to copy data back (crypt) or not (hash) |
85a7f0ac SAS |
51 | * @sg_dst_left: bytes left dst to process in this scatter list |
52 | * @dst_start: offset to add to dst start position (scatter list) | |
7a5f691e | 53 | * @hw_processed_bytes: number of bytes processed by hw (request). |
85a7f0ac SAS |
54 | * |
55 | * sg helper are used to iterate over the scatterlist. Since the size of the | |
56 | * SRAM may be less than the scatter size, this struct struct is used to keep | |
57 | * track of progress within current scatterlist. | |
58 | */ | |
59 | struct req_progress { | |
60 | struct sg_mapping_iter src_sg_it; | |
61 | struct sg_mapping_iter dst_sg_it; | |
a58094ac US |
62 | void (*complete) (void); |
63 | void (*process) (int is_first); | |
85a7f0ac SAS |
64 | |
65 | /* src mostly */ | |
66 | int sg_src_left; | |
67 | int src_start; | |
68 | int crypt_len; | |
3b61a905 | 69 | int hw_nbytes; |
85a7f0ac | 70 | /* dst mostly */ |
f0d03dea | 71 | int copy_back; |
85a7f0ac SAS |
72 | int sg_dst_left; |
73 | int dst_start; | |
7a5f691e | 74 | int hw_processed_bytes; |
85a7f0ac SAS |
75 | }; |
76 | ||
77 | struct crypto_priv { | |
78 | void __iomem *reg; | |
79 | void __iomem *sram; | |
80 | int irq; | |
81 | struct task_struct *queue_th; | |
82 | ||
83 | /* the lock protects queue and eng_st */ | |
84 | spinlock_t lock; | |
85 | struct crypto_queue queue; | |
86 | enum engine_status eng_st; | |
3b61a905 | 87 | struct crypto_async_request *cur_req; |
85a7f0ac SAS |
88 | struct req_progress p; |
89 | int max_req_size; | |
90 | int sram_size; | |
750052dd US |
91 | int has_sha1; |
92 | int has_hmac_sha1; | |
85a7f0ac SAS |
93 | }; |
94 | ||
95 | static struct crypto_priv *cpg; | |
96 | ||
97 | struct mv_ctx { | |
98 | u8 aes_enc_key[AES_KEY_LEN]; | |
99 | u32 aes_dec_key[8]; | |
100 | int key_len; | |
101 | u32 need_calc_aes_dkey; | |
102 | }; | |
103 | ||
104 | enum crypto_op { | |
105 | COP_AES_ECB, | |
106 | COP_AES_CBC, | |
107 | }; | |
108 | ||
109 | struct mv_req_ctx { | |
110 | enum crypto_op op; | |
111 | int decrypt; | |
112 | }; | |
113 | ||
750052dd US |
114 | enum hash_op { |
115 | COP_SHA1, | |
116 | COP_HMAC_SHA1 | |
117 | }; | |
118 | ||
119 | struct mv_tfm_hash_ctx { | |
120 | struct crypto_shash *fallback; | |
121 | struct crypto_shash *base_hash; | |
122 | u32 ivs[2 * SHA1_DIGEST_SIZE / 4]; | |
123 | int count_add; | |
124 | enum hash_op op; | |
125 | }; | |
126 | ||
127 | struct mv_req_hash_ctx { | |
128 | u64 count; | |
129 | u32 state[SHA1_DIGEST_SIZE / 4]; | |
130 | u8 buffer[SHA1_BLOCK_SIZE]; | |
131 | int first_hash; /* marks that we don't have previous state */ | |
132 | int last_chunk; /* marks that this is the 'final' request */ | |
133 | int extra_bytes; /* unprocessed bytes in buffer */ | |
134 | enum hash_op op; | |
135 | int count_add; | |
136 | struct scatterlist dummysg; | |
137 | }; | |
138 | ||
85a7f0ac SAS |
139 | static void compute_aes_dec_key(struct mv_ctx *ctx) |
140 | { | |
141 | struct crypto_aes_ctx gen_aes_key; | |
142 | int key_pos; | |
143 | ||
144 | if (!ctx->need_calc_aes_dkey) | |
145 | return; | |
146 | ||
147 | crypto_aes_expand_key(&gen_aes_key, ctx->aes_enc_key, ctx->key_len); | |
148 | ||
149 | key_pos = ctx->key_len + 24; | |
150 | memcpy(ctx->aes_dec_key, &gen_aes_key.key_enc[key_pos], 4 * 4); | |
151 | switch (ctx->key_len) { | |
152 | case AES_KEYSIZE_256: | |
153 | key_pos -= 2; | |
154 | /* fall */ | |
155 | case AES_KEYSIZE_192: | |
156 | key_pos -= 2; | |
157 | memcpy(&ctx->aes_dec_key[4], &gen_aes_key.key_enc[key_pos], | |
158 | 4 * 4); | |
159 | break; | |
160 | } | |
161 | ctx->need_calc_aes_dkey = 0; | |
162 | } | |
163 | ||
164 | static int mv_setkey_aes(struct crypto_ablkcipher *cipher, const u8 *key, | |
165 | unsigned int len) | |
166 | { | |
167 | struct crypto_tfm *tfm = crypto_ablkcipher_tfm(cipher); | |
168 | struct mv_ctx *ctx = crypto_tfm_ctx(tfm); | |
169 | ||
170 | switch (len) { | |
171 | case AES_KEYSIZE_128: | |
172 | case AES_KEYSIZE_192: | |
173 | case AES_KEYSIZE_256: | |
174 | break; | |
175 | default: | |
176 | crypto_ablkcipher_set_flags(cipher, CRYPTO_TFM_RES_BAD_KEY_LEN); | |
177 | return -EINVAL; | |
178 | } | |
179 | ctx->key_len = len; | |
180 | ctx->need_calc_aes_dkey = 1; | |
181 | ||
182 | memcpy(ctx->aes_enc_key, key, AES_KEY_LEN); | |
183 | return 0; | |
184 | } | |
185 | ||
15d4dd35 | 186 | static void copy_src_to_buf(struct req_progress *p, char *dbuf, int len) |
85a7f0ac SAS |
187 | { |
188 | int ret; | |
15d4dd35 US |
189 | void *sbuf; |
190 | int copied = 0; | |
85a7f0ac | 191 | |
15d4dd35 US |
192 | while (1) { |
193 | if (!p->sg_src_left) { | |
194 | ret = sg_miter_next(&p->src_sg_it); | |
195 | BUG_ON(!ret); | |
196 | p->sg_src_left = p->src_sg_it.length; | |
197 | p->src_start = 0; | |
198 | } | |
85a7f0ac | 199 | |
15d4dd35 US |
200 | sbuf = p->src_sg_it.addr + p->src_start; |
201 | ||
202 | if (p->sg_src_left <= len - copied) { | |
203 | memcpy(dbuf + copied, sbuf, p->sg_src_left); | |
204 | copied += p->sg_src_left; | |
205 | p->sg_src_left = 0; | |
206 | if (copied >= len) | |
207 | break; | |
208 | } else { | |
209 | int copy_len = len - copied; | |
210 | memcpy(dbuf + copied, sbuf, copy_len); | |
211 | p->src_start += copy_len; | |
212 | p->sg_src_left -= copy_len; | |
213 | break; | |
214 | } | |
215 | } | |
216 | } | |
85a7f0ac | 217 | |
3b61a905 | 218 | static void setup_data_in(void) |
15d4dd35 US |
219 | { |
220 | struct req_progress *p = &cpg->p; | |
0c5c6c4b | 221 | int data_in_sram = |
7a5f691e | 222 | min(p->hw_nbytes - p->hw_processed_bytes, cpg->max_req_size); |
0c5c6c4b US |
223 | copy_src_to_buf(p, cpg->sram + SRAM_DATA_IN_START + p->crypt_len, |
224 | data_in_sram - p->crypt_len); | |
225 | p->crypt_len = data_in_sram; | |
85a7f0ac SAS |
226 | } |
227 | ||
228 | static void mv_process_current_q(int first_block) | |
229 | { | |
3b61a905 | 230 | struct ablkcipher_request *req = ablkcipher_request_cast(cpg->cur_req); |
85a7f0ac SAS |
231 | struct mv_ctx *ctx = crypto_tfm_ctx(req->base.tfm); |
232 | struct mv_req_ctx *req_ctx = ablkcipher_request_ctx(req); | |
233 | struct sec_accel_config op; | |
234 | ||
235 | switch (req_ctx->op) { | |
236 | case COP_AES_ECB: | |
237 | op.config = CFG_OP_CRYPT_ONLY | CFG_ENCM_AES | CFG_ENC_MODE_ECB; | |
238 | break; | |
239 | case COP_AES_CBC: | |
6bc6fcd6 | 240 | default: |
85a7f0ac SAS |
241 | op.config = CFG_OP_CRYPT_ONLY | CFG_ENCM_AES | CFG_ENC_MODE_CBC; |
242 | op.enc_iv = ENC_IV_POINT(SRAM_DATA_IV) | | |
243 | ENC_IV_BUF_POINT(SRAM_DATA_IV_BUF); | |
244 | if (first_block) | |
245 | memcpy(cpg->sram + SRAM_DATA_IV, req->info, 16); | |
246 | break; | |
247 | } | |
248 | if (req_ctx->decrypt) { | |
249 | op.config |= CFG_DIR_DEC; | |
250 | memcpy(cpg->sram + SRAM_DATA_KEY_P, ctx->aes_dec_key, | |
251 | AES_KEY_LEN); | |
252 | } else { | |
253 | op.config |= CFG_DIR_ENC; | |
254 | memcpy(cpg->sram + SRAM_DATA_KEY_P, ctx->aes_enc_key, | |
255 | AES_KEY_LEN); | |
256 | } | |
257 | ||
258 | switch (ctx->key_len) { | |
259 | case AES_KEYSIZE_128: | |
260 | op.config |= CFG_AES_LEN_128; | |
261 | break; | |
262 | case AES_KEYSIZE_192: | |
263 | op.config |= CFG_AES_LEN_192; | |
264 | break; | |
265 | case AES_KEYSIZE_256: | |
266 | op.config |= CFG_AES_LEN_256; | |
267 | break; | |
268 | } | |
269 | op.enc_p = ENC_P_SRC(SRAM_DATA_IN_START) | | |
270 | ENC_P_DST(SRAM_DATA_OUT_START); | |
271 | op.enc_key_p = SRAM_DATA_KEY_P; | |
272 | ||
3b61a905 | 273 | setup_data_in(); |
85a7f0ac SAS |
274 | op.enc_len = cpg->p.crypt_len; |
275 | memcpy(cpg->sram + SRAM_CONFIG, &op, | |
276 | sizeof(struct sec_accel_config)); | |
277 | ||
278 | writel(SRAM_CONFIG, cpg->reg + SEC_ACCEL_DESC_P0); | |
279 | /* GO */ | |
280 | writel(SEC_CMD_EN_SEC_ACCL0, cpg->reg + SEC_ACCEL_CMD); | |
281 | ||
282 | /* | |
283 | * XXX: add timer if the interrupt does not occur for some mystery | |
284 | * reason | |
285 | */ | |
286 | } | |
287 | ||
288 | static void mv_crypto_algo_completion(void) | |
289 | { | |
3b61a905 | 290 | struct ablkcipher_request *req = ablkcipher_request_cast(cpg->cur_req); |
85a7f0ac SAS |
291 | struct mv_req_ctx *req_ctx = ablkcipher_request_ctx(req); |
292 | ||
a58094ac US |
293 | sg_miter_stop(&cpg->p.src_sg_it); |
294 | sg_miter_stop(&cpg->p.dst_sg_it); | |
295 | ||
85a7f0ac SAS |
296 | if (req_ctx->op != COP_AES_CBC) |
297 | return ; | |
298 | ||
299 | memcpy(req->info, cpg->sram + SRAM_DATA_IV_BUF, 16); | |
300 | } | |
301 | ||
750052dd US |
302 | static void mv_process_hash_current(int first_block) |
303 | { | |
304 | struct ahash_request *req = ahash_request_cast(cpg->cur_req); | |
305 | struct mv_req_hash_ctx *req_ctx = ahash_request_ctx(req); | |
306 | struct req_progress *p = &cpg->p; | |
307 | struct sec_accel_config op = { 0 }; | |
308 | int is_last; | |
309 | ||
310 | switch (req_ctx->op) { | |
311 | case COP_SHA1: | |
312 | default: | |
313 | op.config = CFG_OP_MAC_ONLY | CFG_MACM_SHA1; | |
314 | break; | |
315 | case COP_HMAC_SHA1: | |
316 | op.config = CFG_OP_MAC_ONLY | CFG_MACM_HMAC_SHA1; | |
317 | break; | |
318 | } | |
319 | ||
320 | op.mac_src_p = | |
321 | MAC_SRC_DATA_P(SRAM_DATA_IN_START) | MAC_SRC_TOTAL_LEN((u32) | |
322 | req_ctx-> | |
323 | count); | |
324 | ||
325 | setup_data_in(); | |
326 | ||
327 | op.mac_digest = | |
328 | MAC_DIGEST_P(SRAM_DIGEST_BUF) | MAC_FRAG_LEN(p->crypt_len); | |
329 | op.mac_iv = | |
330 | MAC_INNER_IV_P(SRAM_HMAC_IV_IN) | | |
331 | MAC_OUTER_IV_P(SRAM_HMAC_IV_OUT); | |
332 | ||
333 | is_last = req_ctx->last_chunk | |
334 | && (p->hw_processed_bytes + p->crypt_len >= p->hw_nbytes) | |
335 | && (req_ctx->count <= MAX_HW_HASH_SIZE); | |
336 | if (req_ctx->first_hash) { | |
337 | if (is_last) | |
338 | op.config |= CFG_NOT_FRAG; | |
339 | else | |
340 | op.config |= CFG_FIRST_FRAG; | |
341 | ||
342 | req_ctx->first_hash = 0; | |
343 | } else { | |
344 | if (is_last) | |
345 | op.config |= CFG_LAST_FRAG; | |
346 | else | |
347 | op.config |= CFG_MID_FRAG; | |
348 | } | |
349 | ||
350 | memcpy(cpg->sram + SRAM_CONFIG, &op, sizeof(struct sec_accel_config)); | |
351 | ||
352 | writel(SRAM_CONFIG, cpg->reg + SEC_ACCEL_DESC_P0); | |
353 | /* GO */ | |
354 | writel(SEC_CMD_EN_SEC_ACCL0, cpg->reg + SEC_ACCEL_CMD); | |
355 | ||
356 | /* | |
357 | * XXX: add timer if the interrupt does not occur for some mystery | |
358 | * reason | |
359 | */ | |
360 | } | |
361 | ||
362 | static inline int mv_hash_import_sha1_ctx(const struct mv_req_hash_ctx *ctx, | |
363 | struct shash_desc *desc) | |
364 | { | |
365 | int i; | |
366 | struct sha1_state shash_state; | |
367 | ||
368 | shash_state.count = ctx->count + ctx->count_add; | |
369 | for (i = 0; i < 5; i++) | |
370 | shash_state.state[i] = ctx->state[i]; | |
371 | memcpy(shash_state.buffer, ctx->buffer, sizeof(shash_state.buffer)); | |
372 | return crypto_shash_import(desc, &shash_state); | |
373 | } | |
374 | ||
375 | static int mv_hash_final_fallback(struct ahash_request *req) | |
376 | { | |
377 | const struct mv_tfm_hash_ctx *tfm_ctx = crypto_tfm_ctx(req->base.tfm); | |
378 | struct mv_req_hash_ctx *req_ctx = ahash_request_ctx(req); | |
379 | struct { | |
380 | struct shash_desc shash; | |
381 | char ctx[crypto_shash_descsize(tfm_ctx->fallback)]; | |
382 | } desc; | |
383 | int rc; | |
384 | ||
385 | desc.shash.tfm = tfm_ctx->fallback; | |
386 | desc.shash.flags = CRYPTO_TFM_REQ_MAY_SLEEP; | |
387 | if (unlikely(req_ctx->first_hash)) { | |
388 | crypto_shash_init(&desc.shash); | |
389 | crypto_shash_update(&desc.shash, req_ctx->buffer, | |
390 | req_ctx->extra_bytes); | |
391 | } else { | |
392 | /* only SHA1 for now.... | |
393 | */ | |
394 | rc = mv_hash_import_sha1_ctx(req_ctx, &desc.shash); | |
395 | if (rc) | |
396 | goto out; | |
397 | } | |
398 | rc = crypto_shash_final(&desc.shash, req->result); | |
399 | out: | |
400 | return rc; | |
401 | } | |
402 | ||
403 | static void mv_hash_algo_completion(void) | |
404 | { | |
405 | struct ahash_request *req = ahash_request_cast(cpg->cur_req); | |
406 | struct mv_req_hash_ctx *ctx = ahash_request_ctx(req); | |
407 | ||
408 | if (ctx->extra_bytes) | |
409 | copy_src_to_buf(&cpg->p, ctx->buffer, ctx->extra_bytes); | |
410 | sg_miter_stop(&cpg->p.src_sg_it); | |
411 | ||
412 | ctx->state[0] = readl(cpg->reg + DIGEST_INITIAL_VAL_A); | |
413 | ctx->state[1] = readl(cpg->reg + DIGEST_INITIAL_VAL_B); | |
414 | ctx->state[2] = readl(cpg->reg + DIGEST_INITIAL_VAL_C); | |
415 | ctx->state[3] = readl(cpg->reg + DIGEST_INITIAL_VAL_D); | |
416 | ctx->state[4] = readl(cpg->reg + DIGEST_INITIAL_VAL_E); | |
417 | ||
418 | if (likely(ctx->last_chunk)) { | |
419 | if (likely(ctx->count <= MAX_HW_HASH_SIZE)) { | |
420 | memcpy(req->result, cpg->sram + SRAM_DIGEST_BUF, | |
421 | crypto_ahash_digestsize(crypto_ahash_reqtfm | |
422 | (req))); | |
423 | } else | |
424 | mv_hash_final_fallback(req); | |
425 | } | |
426 | } | |
427 | ||
85a7f0ac SAS |
428 | static void dequeue_complete_req(void) |
429 | { | |
3b61a905 | 430 | struct crypto_async_request *req = cpg->cur_req; |
85a7f0ac SAS |
431 | void *buf; |
432 | int ret; | |
7a5f691e | 433 | cpg->p.hw_processed_bytes += cpg->p.crypt_len; |
f0d03dea US |
434 | if (cpg->p.copy_back) { |
435 | int need_copy_len = cpg->p.crypt_len; | |
436 | int sram_offset = 0; | |
437 | do { | |
438 | int dst_copy; | |
439 | ||
440 | if (!cpg->p.sg_dst_left) { | |
441 | ret = sg_miter_next(&cpg->p.dst_sg_it); | |
442 | BUG_ON(!ret); | |
443 | cpg->p.sg_dst_left = cpg->p.dst_sg_it.length; | |
444 | cpg->p.dst_start = 0; | |
445 | } | |
446 | ||
447 | buf = cpg->p.dst_sg_it.addr; | |
448 | buf += cpg->p.dst_start; | |
449 | ||
450 | dst_copy = min(need_copy_len, cpg->p.sg_dst_left); | |
451 | ||
452 | memcpy(buf, | |
453 | cpg->sram + SRAM_DATA_OUT_START + sram_offset, | |
454 | dst_copy); | |
455 | sram_offset += dst_copy; | |
456 | cpg->p.sg_dst_left -= dst_copy; | |
457 | need_copy_len -= dst_copy; | |
458 | cpg->p.dst_start += dst_copy; | |
459 | } while (need_copy_len > 0); | |
460 | } | |
85a7f0ac | 461 | |
0c5c6c4b | 462 | cpg->p.crypt_len = 0; |
85a7f0ac SAS |
463 | |
464 | BUG_ON(cpg->eng_st != ENGINE_W_DEQUEUE); | |
7a5f691e | 465 | if (cpg->p.hw_processed_bytes < cpg->p.hw_nbytes) { |
85a7f0ac SAS |
466 | /* process next scatter list entry */ |
467 | cpg->eng_st = ENGINE_BUSY; | |
a58094ac | 468 | cpg->p.process(0); |
85a7f0ac | 469 | } else { |
a58094ac | 470 | cpg->p.complete(); |
85a7f0ac | 471 | cpg->eng_st = ENGINE_IDLE; |
0328ac26 | 472 | local_bh_disable(); |
3b61a905 | 473 | req->complete(req, 0); |
0328ac26 | 474 | local_bh_enable(); |
85a7f0ac SAS |
475 | } |
476 | } | |
477 | ||
478 | static int count_sgs(struct scatterlist *sl, unsigned int total_bytes) | |
479 | { | |
480 | int i = 0; | |
15d4dd35 US |
481 | size_t cur_len; |
482 | ||
483 | while (1) { | |
484 | cur_len = sl[i].length; | |
485 | ++i; | |
486 | if (total_bytes > cur_len) | |
487 | total_bytes -= cur_len; | |
488 | else | |
489 | break; | |
490 | } | |
85a7f0ac SAS |
491 | |
492 | return i; | |
493 | } | |
494 | ||
750052dd | 495 | static void mv_start_new_crypt_req(struct ablkcipher_request *req) |
85a7f0ac | 496 | { |
3b61a905 | 497 | struct req_progress *p = &cpg->p; |
85a7f0ac SAS |
498 | int num_sgs; |
499 | ||
3b61a905 US |
500 | cpg->cur_req = &req->base; |
501 | memset(p, 0, sizeof(struct req_progress)); | |
502 | p->hw_nbytes = req->nbytes; | |
a58094ac US |
503 | p->complete = mv_crypto_algo_completion; |
504 | p->process = mv_process_current_q; | |
f0d03dea | 505 | p->copy_back = 1; |
85a7f0ac SAS |
506 | |
507 | num_sgs = count_sgs(req->src, req->nbytes); | |
3b61a905 | 508 | sg_miter_start(&p->src_sg_it, req->src, num_sgs, SG_MITER_FROM_SG); |
85a7f0ac SAS |
509 | |
510 | num_sgs = count_sgs(req->dst, req->nbytes); | |
3b61a905 US |
511 | sg_miter_start(&p->dst_sg_it, req->dst, num_sgs, SG_MITER_TO_SG); |
512 | ||
85a7f0ac SAS |
513 | mv_process_current_q(1); |
514 | } | |
515 | ||
750052dd US |
516 | static void mv_start_new_hash_req(struct ahash_request *req) |
517 | { | |
518 | struct req_progress *p = &cpg->p; | |
519 | struct mv_req_hash_ctx *ctx = ahash_request_ctx(req); | |
520 | const struct mv_tfm_hash_ctx *tfm_ctx = crypto_tfm_ctx(req->base.tfm); | |
521 | int num_sgs, hw_bytes, old_extra_bytes, rc; | |
522 | cpg->cur_req = &req->base; | |
523 | memset(p, 0, sizeof(struct req_progress)); | |
524 | hw_bytes = req->nbytes + ctx->extra_bytes; | |
525 | old_extra_bytes = ctx->extra_bytes; | |
526 | ||
527 | if (unlikely(ctx->extra_bytes)) { | |
528 | memcpy(cpg->sram + SRAM_DATA_IN_START, ctx->buffer, | |
529 | ctx->extra_bytes); | |
530 | p->crypt_len = ctx->extra_bytes; | |
531 | } | |
532 | ||
533 | memcpy(cpg->sram + SRAM_HMAC_IV_IN, tfm_ctx->ivs, sizeof(tfm_ctx->ivs)); | |
534 | ||
535 | if (unlikely(!ctx->first_hash)) { | |
536 | writel(ctx->state[0], cpg->reg + DIGEST_INITIAL_VAL_A); | |
537 | writel(ctx->state[1], cpg->reg + DIGEST_INITIAL_VAL_B); | |
538 | writel(ctx->state[2], cpg->reg + DIGEST_INITIAL_VAL_C); | |
539 | writel(ctx->state[3], cpg->reg + DIGEST_INITIAL_VAL_D); | |
540 | writel(ctx->state[4], cpg->reg + DIGEST_INITIAL_VAL_E); | |
541 | } | |
542 | ||
543 | ctx->extra_bytes = hw_bytes % SHA1_BLOCK_SIZE; | |
544 | if (ctx->extra_bytes != 0 | |
545 | && (!ctx->last_chunk || ctx->count > MAX_HW_HASH_SIZE)) | |
546 | hw_bytes -= ctx->extra_bytes; | |
547 | else | |
548 | ctx->extra_bytes = 0; | |
549 | ||
550 | num_sgs = count_sgs(req->src, req->nbytes); | |
551 | sg_miter_start(&p->src_sg_it, req->src, num_sgs, SG_MITER_FROM_SG); | |
552 | ||
553 | if (hw_bytes) { | |
554 | p->hw_nbytes = hw_bytes; | |
555 | p->complete = mv_hash_algo_completion; | |
556 | p->process = mv_process_hash_current; | |
557 | ||
558 | mv_process_hash_current(1); | |
559 | } else { | |
560 | copy_src_to_buf(p, ctx->buffer + old_extra_bytes, | |
561 | ctx->extra_bytes - old_extra_bytes); | |
562 | sg_miter_stop(&p->src_sg_it); | |
563 | if (ctx->last_chunk) | |
564 | rc = mv_hash_final_fallback(req); | |
565 | else | |
566 | rc = 0; | |
567 | cpg->eng_st = ENGINE_IDLE; | |
568 | local_bh_disable(); | |
569 | req->base.complete(&req->base, rc); | |
570 | local_bh_enable(); | |
571 | } | |
572 | } | |
573 | ||
85a7f0ac SAS |
574 | static int queue_manag(void *data) |
575 | { | |
576 | cpg->eng_st = ENGINE_IDLE; | |
577 | do { | |
85a7f0ac SAS |
578 | struct crypto_async_request *async_req = NULL; |
579 | struct crypto_async_request *backlog; | |
580 | ||
581 | __set_current_state(TASK_INTERRUPTIBLE); | |
582 | ||
583 | if (cpg->eng_st == ENGINE_W_DEQUEUE) | |
584 | dequeue_complete_req(); | |
585 | ||
586 | spin_lock_irq(&cpg->lock); | |
587 | if (cpg->eng_st == ENGINE_IDLE) { | |
588 | backlog = crypto_get_backlog(&cpg->queue); | |
589 | async_req = crypto_dequeue_request(&cpg->queue); | |
590 | if (async_req) { | |
591 | BUG_ON(cpg->eng_st != ENGINE_IDLE); | |
592 | cpg->eng_st = ENGINE_BUSY; | |
593 | } | |
594 | } | |
595 | spin_unlock_irq(&cpg->lock); | |
596 | ||
597 | if (backlog) { | |
598 | backlog->complete(backlog, -EINPROGRESS); | |
599 | backlog = NULL; | |
600 | } | |
601 | ||
602 | if (async_req) { | |
750052dd US |
603 | if (async_req->tfm->__crt_alg->cra_type != |
604 | &crypto_ahash_type) { | |
605 | struct ablkcipher_request *req = | |
606 | container_of(async_req, | |
607 | struct ablkcipher_request, | |
608 | base); | |
609 | mv_start_new_crypt_req(req); | |
610 | } else { | |
611 | struct ahash_request *req = | |
612 | ahash_request_cast(async_req); | |
613 | mv_start_new_hash_req(req); | |
614 | } | |
85a7f0ac SAS |
615 | async_req = NULL; |
616 | } | |
617 | ||
618 | schedule(); | |
619 | ||
620 | } while (!kthread_should_stop()); | |
621 | return 0; | |
622 | } | |
623 | ||
3b61a905 | 624 | static int mv_handle_req(struct crypto_async_request *req) |
85a7f0ac SAS |
625 | { |
626 | unsigned long flags; | |
627 | int ret; | |
628 | ||
629 | spin_lock_irqsave(&cpg->lock, flags); | |
3b61a905 | 630 | ret = crypto_enqueue_request(&cpg->queue, req); |
85a7f0ac SAS |
631 | spin_unlock_irqrestore(&cpg->lock, flags); |
632 | wake_up_process(cpg->queue_th); | |
633 | return ret; | |
634 | } | |
635 | ||
636 | static int mv_enc_aes_ecb(struct ablkcipher_request *req) | |
637 | { | |
638 | struct mv_req_ctx *req_ctx = ablkcipher_request_ctx(req); | |
639 | ||
640 | req_ctx->op = COP_AES_ECB; | |
641 | req_ctx->decrypt = 0; | |
642 | ||
3b61a905 | 643 | return mv_handle_req(&req->base); |
85a7f0ac SAS |
644 | } |
645 | ||
646 | static int mv_dec_aes_ecb(struct ablkcipher_request *req) | |
647 | { | |
648 | struct mv_ctx *ctx = crypto_tfm_ctx(req->base.tfm); | |
649 | struct mv_req_ctx *req_ctx = ablkcipher_request_ctx(req); | |
650 | ||
651 | req_ctx->op = COP_AES_ECB; | |
652 | req_ctx->decrypt = 1; | |
653 | ||
654 | compute_aes_dec_key(ctx); | |
3b61a905 | 655 | return mv_handle_req(&req->base); |
85a7f0ac SAS |
656 | } |
657 | ||
658 | static int mv_enc_aes_cbc(struct ablkcipher_request *req) | |
659 | { | |
660 | struct mv_req_ctx *req_ctx = ablkcipher_request_ctx(req); | |
661 | ||
662 | req_ctx->op = COP_AES_CBC; | |
663 | req_ctx->decrypt = 0; | |
664 | ||
3b61a905 | 665 | return mv_handle_req(&req->base); |
85a7f0ac SAS |
666 | } |
667 | ||
668 | static int mv_dec_aes_cbc(struct ablkcipher_request *req) | |
669 | { | |
670 | struct mv_ctx *ctx = crypto_tfm_ctx(req->base.tfm); | |
671 | struct mv_req_ctx *req_ctx = ablkcipher_request_ctx(req); | |
672 | ||
673 | req_ctx->op = COP_AES_CBC; | |
674 | req_ctx->decrypt = 1; | |
675 | ||
676 | compute_aes_dec_key(ctx); | |
3b61a905 | 677 | return mv_handle_req(&req->base); |
85a7f0ac SAS |
678 | } |
679 | ||
680 | static int mv_cra_init(struct crypto_tfm *tfm) | |
681 | { | |
682 | tfm->crt_ablkcipher.reqsize = sizeof(struct mv_req_ctx); | |
683 | return 0; | |
684 | } | |
685 | ||
750052dd US |
686 | static void mv_init_hash_req_ctx(struct mv_req_hash_ctx *ctx, int op, |
687 | int is_last, unsigned int req_len, | |
688 | int count_add) | |
689 | { | |
690 | memset(ctx, 0, sizeof(*ctx)); | |
691 | ctx->op = op; | |
692 | ctx->count = req_len; | |
693 | ctx->first_hash = 1; | |
694 | ctx->last_chunk = is_last; | |
695 | ctx->count_add = count_add; | |
696 | } | |
697 | ||
698 | static void mv_update_hash_req_ctx(struct mv_req_hash_ctx *ctx, int is_last, | |
699 | unsigned req_len) | |
700 | { | |
701 | ctx->last_chunk = is_last; | |
702 | ctx->count += req_len; | |
703 | } | |
704 | ||
705 | static int mv_hash_init(struct ahash_request *req) | |
706 | { | |
707 | const struct mv_tfm_hash_ctx *tfm_ctx = crypto_tfm_ctx(req->base.tfm); | |
708 | mv_init_hash_req_ctx(ahash_request_ctx(req), tfm_ctx->op, 0, 0, | |
709 | tfm_ctx->count_add); | |
710 | return 0; | |
711 | } | |
712 | ||
713 | static int mv_hash_update(struct ahash_request *req) | |
714 | { | |
715 | if (!req->nbytes) | |
716 | return 0; | |
717 | ||
718 | mv_update_hash_req_ctx(ahash_request_ctx(req), 0, req->nbytes); | |
719 | return mv_handle_req(&req->base); | |
720 | } | |
721 | ||
722 | static int mv_hash_final(struct ahash_request *req) | |
723 | { | |
724 | struct mv_req_hash_ctx *ctx = ahash_request_ctx(req); | |
725 | /* dummy buffer of 4 bytes */ | |
726 | sg_init_one(&ctx->dummysg, ctx->buffer, 4); | |
727 | /* I think I'm allowed to do that... */ | |
728 | ahash_request_set_crypt(req, &ctx->dummysg, req->result, 0); | |
729 | mv_update_hash_req_ctx(ctx, 1, 0); | |
730 | return mv_handle_req(&req->base); | |
731 | } | |
732 | ||
733 | static int mv_hash_finup(struct ahash_request *req) | |
734 | { | |
735 | if (!req->nbytes) | |
736 | return mv_hash_final(req); | |
737 | ||
738 | mv_update_hash_req_ctx(ahash_request_ctx(req), 1, req->nbytes); | |
739 | return mv_handle_req(&req->base); | |
740 | } | |
741 | ||
742 | static int mv_hash_digest(struct ahash_request *req) | |
743 | { | |
744 | const struct mv_tfm_hash_ctx *tfm_ctx = crypto_tfm_ctx(req->base.tfm); | |
745 | mv_init_hash_req_ctx(ahash_request_ctx(req), tfm_ctx->op, 1, | |
746 | req->nbytes, tfm_ctx->count_add); | |
747 | return mv_handle_req(&req->base); | |
748 | } | |
749 | ||
750 | static void mv_hash_init_ivs(struct mv_tfm_hash_ctx *ctx, const void *istate, | |
751 | const void *ostate) | |
752 | { | |
753 | const struct sha1_state *isha1_state = istate, *osha1_state = ostate; | |
754 | int i; | |
755 | for (i = 0; i < 5; i++) { | |
756 | ctx->ivs[i] = cpu_to_be32(isha1_state->state[i]); | |
757 | ctx->ivs[i + 5] = cpu_to_be32(osha1_state->state[i]); | |
758 | } | |
759 | } | |
760 | ||
761 | static int mv_hash_setkey(struct crypto_ahash *tfm, const u8 * key, | |
762 | unsigned int keylen) | |
763 | { | |
764 | int rc; | |
765 | struct mv_tfm_hash_ctx *ctx = crypto_tfm_ctx(&tfm->base); | |
766 | int bs, ds, ss; | |
767 | ||
768 | if (!ctx->base_hash) | |
769 | return 0; | |
770 | ||
771 | rc = crypto_shash_setkey(ctx->fallback, key, keylen); | |
772 | if (rc) | |
773 | return rc; | |
774 | ||
775 | /* Can't see a way to extract the ipad/opad from the fallback tfm | |
776 | so I'm basically copying code from the hmac module */ | |
777 | bs = crypto_shash_blocksize(ctx->base_hash); | |
778 | ds = crypto_shash_digestsize(ctx->base_hash); | |
779 | ss = crypto_shash_statesize(ctx->base_hash); | |
780 | ||
781 | { | |
782 | struct { | |
783 | struct shash_desc shash; | |
784 | char ctx[crypto_shash_descsize(ctx->base_hash)]; | |
785 | } desc; | |
786 | unsigned int i; | |
787 | char ipad[ss]; | |
788 | char opad[ss]; | |
789 | ||
790 | desc.shash.tfm = ctx->base_hash; | |
791 | desc.shash.flags = crypto_shash_get_flags(ctx->base_hash) & | |
792 | CRYPTO_TFM_REQ_MAY_SLEEP; | |
793 | ||
794 | if (keylen > bs) { | |
795 | int err; | |
796 | ||
797 | err = | |
798 | crypto_shash_digest(&desc.shash, key, keylen, ipad); | |
799 | if (err) | |
800 | return err; | |
801 | ||
802 | keylen = ds; | |
803 | } else | |
804 | memcpy(ipad, key, keylen); | |
805 | ||
806 | memset(ipad + keylen, 0, bs - keylen); | |
807 | memcpy(opad, ipad, bs); | |
808 | ||
809 | for (i = 0; i < bs; i++) { | |
810 | ipad[i] ^= 0x36; | |
811 | opad[i] ^= 0x5c; | |
812 | } | |
813 | ||
814 | rc = crypto_shash_init(&desc.shash) ? : | |
815 | crypto_shash_update(&desc.shash, ipad, bs) ? : | |
816 | crypto_shash_export(&desc.shash, ipad) ? : | |
817 | crypto_shash_init(&desc.shash) ? : | |
818 | crypto_shash_update(&desc.shash, opad, bs) ? : | |
819 | crypto_shash_export(&desc.shash, opad); | |
820 | ||
821 | if (rc == 0) | |
822 | mv_hash_init_ivs(ctx, ipad, opad); | |
823 | ||
824 | return rc; | |
825 | } | |
826 | } | |
827 | ||
828 | static int mv_cra_hash_init(struct crypto_tfm *tfm, const char *base_hash_name, | |
829 | enum hash_op op, int count_add) | |
830 | { | |
831 | const char *fallback_driver_name = tfm->__crt_alg->cra_name; | |
832 | struct mv_tfm_hash_ctx *ctx = crypto_tfm_ctx(tfm); | |
833 | struct crypto_shash *fallback_tfm = NULL; | |
834 | struct crypto_shash *base_hash = NULL; | |
835 | int err = -ENOMEM; | |
836 | ||
837 | ctx->op = op; | |
838 | ctx->count_add = count_add; | |
839 | ||
840 | /* Allocate a fallback and abort if it failed. */ | |
841 | fallback_tfm = crypto_alloc_shash(fallback_driver_name, 0, | |
842 | CRYPTO_ALG_NEED_FALLBACK); | |
843 | if (IS_ERR(fallback_tfm)) { | |
844 | printk(KERN_WARNING MV_CESA | |
845 | "Fallback driver '%s' could not be loaded!\n", | |
846 | fallback_driver_name); | |
847 | err = PTR_ERR(fallback_tfm); | |
848 | goto out; | |
849 | } | |
850 | ctx->fallback = fallback_tfm; | |
851 | ||
852 | if (base_hash_name) { | |
853 | /* Allocate a hash to compute the ipad/opad of hmac. */ | |
854 | base_hash = crypto_alloc_shash(base_hash_name, 0, | |
855 | CRYPTO_ALG_NEED_FALLBACK); | |
856 | if (IS_ERR(base_hash)) { | |
857 | printk(KERN_WARNING MV_CESA | |
858 | "Base driver '%s' could not be loaded!\n", | |
859 | base_hash_name); | |
860 | err = PTR_ERR(fallback_tfm); | |
861 | goto err_bad_base; | |
862 | } | |
863 | } | |
864 | ctx->base_hash = base_hash; | |
865 | ||
866 | crypto_ahash_set_reqsize(__crypto_ahash_cast(tfm), | |
867 | sizeof(struct mv_req_hash_ctx) + | |
868 | crypto_shash_descsize(ctx->fallback)); | |
869 | return 0; | |
870 | err_bad_base: | |
871 | crypto_free_shash(fallback_tfm); | |
872 | out: | |
873 | return err; | |
874 | } | |
875 | ||
876 | static void mv_cra_hash_exit(struct crypto_tfm *tfm) | |
877 | { | |
878 | struct mv_tfm_hash_ctx *ctx = crypto_tfm_ctx(tfm); | |
879 | ||
880 | crypto_free_shash(ctx->fallback); | |
881 | if (ctx->base_hash) | |
882 | crypto_free_shash(ctx->base_hash); | |
883 | } | |
884 | ||
885 | static int mv_cra_hash_sha1_init(struct crypto_tfm *tfm) | |
886 | { | |
887 | return mv_cra_hash_init(tfm, NULL, COP_SHA1, 0); | |
888 | } | |
889 | ||
890 | static int mv_cra_hash_hmac_sha1_init(struct crypto_tfm *tfm) | |
891 | { | |
892 | return mv_cra_hash_init(tfm, "sha1", COP_HMAC_SHA1, SHA1_BLOCK_SIZE); | |
893 | } | |
894 | ||
85a7f0ac SAS |
895 | irqreturn_t crypto_int(int irq, void *priv) |
896 | { | |
897 | u32 val; | |
898 | ||
899 | val = readl(cpg->reg + SEC_ACCEL_INT_STATUS); | |
900 | if (!(val & SEC_INT_ACCEL0_DONE)) | |
901 | return IRQ_NONE; | |
902 | ||
903 | val &= ~SEC_INT_ACCEL0_DONE; | |
904 | writel(val, cpg->reg + FPGA_INT_STATUS); | |
905 | writel(val, cpg->reg + SEC_ACCEL_INT_STATUS); | |
906 | BUG_ON(cpg->eng_st != ENGINE_BUSY); | |
907 | cpg->eng_st = ENGINE_W_DEQUEUE; | |
908 | wake_up_process(cpg->queue_th); | |
909 | return IRQ_HANDLED; | |
910 | } | |
911 | ||
912 | struct crypto_alg mv_aes_alg_ecb = { | |
913 | .cra_name = "ecb(aes)", | |
914 | .cra_driver_name = "mv-ecb-aes", | |
915 | .cra_priority = 300, | |
916 | .cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER | CRYPTO_ALG_ASYNC, | |
917 | .cra_blocksize = 16, | |
918 | .cra_ctxsize = sizeof(struct mv_ctx), | |
919 | .cra_alignmask = 0, | |
920 | .cra_type = &crypto_ablkcipher_type, | |
921 | .cra_module = THIS_MODULE, | |
922 | .cra_init = mv_cra_init, | |
923 | .cra_u = { | |
924 | .ablkcipher = { | |
925 | .min_keysize = AES_MIN_KEY_SIZE, | |
926 | .max_keysize = AES_MAX_KEY_SIZE, | |
927 | .setkey = mv_setkey_aes, | |
928 | .encrypt = mv_enc_aes_ecb, | |
929 | .decrypt = mv_dec_aes_ecb, | |
930 | }, | |
931 | }, | |
932 | }; | |
933 | ||
934 | struct crypto_alg mv_aes_alg_cbc = { | |
935 | .cra_name = "cbc(aes)", | |
936 | .cra_driver_name = "mv-cbc-aes", | |
937 | .cra_priority = 300, | |
938 | .cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER | CRYPTO_ALG_ASYNC, | |
939 | .cra_blocksize = AES_BLOCK_SIZE, | |
940 | .cra_ctxsize = sizeof(struct mv_ctx), | |
941 | .cra_alignmask = 0, | |
942 | .cra_type = &crypto_ablkcipher_type, | |
943 | .cra_module = THIS_MODULE, | |
944 | .cra_init = mv_cra_init, | |
945 | .cra_u = { | |
946 | .ablkcipher = { | |
947 | .ivsize = AES_BLOCK_SIZE, | |
948 | .min_keysize = AES_MIN_KEY_SIZE, | |
949 | .max_keysize = AES_MAX_KEY_SIZE, | |
950 | .setkey = mv_setkey_aes, | |
951 | .encrypt = mv_enc_aes_cbc, | |
952 | .decrypt = mv_dec_aes_cbc, | |
953 | }, | |
954 | }, | |
955 | }; | |
956 | ||
750052dd US |
957 | struct ahash_alg mv_sha1_alg = { |
958 | .init = mv_hash_init, | |
959 | .update = mv_hash_update, | |
960 | .final = mv_hash_final, | |
961 | .finup = mv_hash_finup, | |
962 | .digest = mv_hash_digest, | |
963 | .halg = { | |
964 | .digestsize = SHA1_DIGEST_SIZE, | |
965 | .base = { | |
966 | .cra_name = "sha1", | |
967 | .cra_driver_name = "mv-sha1", | |
968 | .cra_priority = 300, | |
969 | .cra_flags = | |
970 | CRYPTO_ALG_ASYNC | CRYPTO_ALG_NEED_FALLBACK, | |
971 | .cra_blocksize = SHA1_BLOCK_SIZE, | |
972 | .cra_ctxsize = sizeof(struct mv_tfm_hash_ctx), | |
973 | .cra_init = mv_cra_hash_sha1_init, | |
974 | .cra_exit = mv_cra_hash_exit, | |
975 | .cra_module = THIS_MODULE, | |
976 | } | |
977 | } | |
978 | }; | |
979 | ||
980 | struct ahash_alg mv_hmac_sha1_alg = { | |
981 | .init = mv_hash_init, | |
982 | .update = mv_hash_update, | |
983 | .final = mv_hash_final, | |
984 | .finup = mv_hash_finup, | |
985 | .digest = mv_hash_digest, | |
986 | .setkey = mv_hash_setkey, | |
987 | .halg = { | |
988 | .digestsize = SHA1_DIGEST_SIZE, | |
989 | .base = { | |
990 | .cra_name = "hmac(sha1)", | |
991 | .cra_driver_name = "mv-hmac-sha1", | |
992 | .cra_priority = 300, | |
993 | .cra_flags = | |
994 | CRYPTO_ALG_ASYNC | CRYPTO_ALG_NEED_FALLBACK, | |
995 | .cra_blocksize = SHA1_BLOCK_SIZE, | |
996 | .cra_ctxsize = sizeof(struct mv_tfm_hash_ctx), | |
997 | .cra_init = mv_cra_hash_hmac_sha1_init, | |
998 | .cra_exit = mv_cra_hash_exit, | |
999 | .cra_module = THIS_MODULE, | |
1000 | } | |
1001 | } | |
1002 | }; | |
1003 | ||
85a7f0ac SAS |
1004 | static int mv_probe(struct platform_device *pdev) |
1005 | { | |
1006 | struct crypto_priv *cp; | |
1007 | struct resource *res; | |
1008 | int irq; | |
1009 | int ret; | |
1010 | ||
1011 | if (cpg) { | |
750052dd | 1012 | printk(KERN_ERR MV_CESA "Second crypto dev?\n"); |
85a7f0ac SAS |
1013 | return -EEXIST; |
1014 | } | |
1015 | ||
1016 | res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "regs"); | |
1017 | if (!res) | |
1018 | return -ENXIO; | |
1019 | ||
1020 | cp = kzalloc(sizeof(*cp), GFP_KERNEL); | |
1021 | if (!cp) | |
1022 | return -ENOMEM; | |
1023 | ||
1024 | spin_lock_init(&cp->lock); | |
1025 | crypto_init_queue(&cp->queue, 50); | |
5bdd5ded | 1026 | cp->reg = ioremap(res->start, resource_size(res)); |
85a7f0ac SAS |
1027 | if (!cp->reg) { |
1028 | ret = -ENOMEM; | |
1029 | goto err; | |
1030 | } | |
1031 | ||
1032 | res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "sram"); | |
1033 | if (!res) { | |
1034 | ret = -ENXIO; | |
1035 | goto err_unmap_reg; | |
1036 | } | |
5bdd5ded | 1037 | cp->sram_size = resource_size(res); |
85a7f0ac SAS |
1038 | cp->max_req_size = cp->sram_size - SRAM_CFG_SPACE; |
1039 | cp->sram = ioremap(res->start, cp->sram_size); | |
1040 | if (!cp->sram) { | |
1041 | ret = -ENOMEM; | |
1042 | goto err_unmap_reg; | |
1043 | } | |
1044 | ||
1045 | irq = platform_get_irq(pdev, 0); | |
1046 | if (irq < 0 || irq == NO_IRQ) { | |
1047 | ret = irq; | |
1048 | goto err_unmap_sram; | |
1049 | } | |
1050 | cp->irq = irq; | |
1051 | ||
1052 | platform_set_drvdata(pdev, cp); | |
1053 | cpg = cp; | |
1054 | ||
1055 | cp->queue_th = kthread_run(queue_manag, cp, "mv_crypto"); | |
1056 | if (IS_ERR(cp->queue_th)) { | |
1057 | ret = PTR_ERR(cp->queue_th); | |
7cc28350 | 1058 | goto err_unmap_sram; |
85a7f0ac SAS |
1059 | } |
1060 | ||
1061 | ret = request_irq(irq, crypto_int, IRQF_DISABLED, dev_name(&pdev->dev), | |
1062 | cp); | |
1063 | if (ret) | |
7cc28350 | 1064 | goto err_thread; |
85a7f0ac SAS |
1065 | |
1066 | writel(SEC_INT_ACCEL0_DONE, cpg->reg + SEC_ACCEL_INT_MASK); | |
1067 | writel(SEC_CFG_STOP_DIG_ERR, cpg->reg + SEC_ACCEL_CFG); | |
1068 | ||
1069 | ret = crypto_register_alg(&mv_aes_alg_ecb); | |
1070 | if (ret) | |
7cc28350 | 1071 | goto err_irq; |
85a7f0ac SAS |
1072 | |
1073 | ret = crypto_register_alg(&mv_aes_alg_cbc); | |
1074 | if (ret) | |
1075 | goto err_unreg_ecb; | |
750052dd US |
1076 | |
1077 | ret = crypto_register_ahash(&mv_sha1_alg); | |
1078 | if (ret == 0) | |
1079 | cpg->has_sha1 = 1; | |
1080 | else | |
1081 | printk(KERN_WARNING MV_CESA "Could not register sha1 driver\n"); | |
1082 | ||
1083 | ret = crypto_register_ahash(&mv_hmac_sha1_alg); | |
1084 | if (ret == 0) { | |
1085 | cpg->has_hmac_sha1 = 1; | |
1086 | } else { | |
1087 | printk(KERN_WARNING MV_CESA | |
1088 | "Could not register hmac-sha1 driver\n"); | |
1089 | } | |
1090 | ||
85a7f0ac SAS |
1091 | return 0; |
1092 | err_unreg_ecb: | |
1093 | crypto_unregister_alg(&mv_aes_alg_ecb); | |
7cc28350 | 1094 | err_irq: |
85a7f0ac | 1095 | free_irq(irq, cp); |
7cc28350 | 1096 | err_thread: |
85a7f0ac SAS |
1097 | kthread_stop(cp->queue_th); |
1098 | err_unmap_sram: | |
1099 | iounmap(cp->sram); | |
1100 | err_unmap_reg: | |
1101 | iounmap(cp->reg); | |
1102 | err: | |
1103 | kfree(cp); | |
1104 | cpg = NULL; | |
1105 | platform_set_drvdata(pdev, NULL); | |
1106 | return ret; | |
1107 | } | |
1108 | ||
1109 | static int mv_remove(struct platform_device *pdev) | |
1110 | { | |
1111 | struct crypto_priv *cp = platform_get_drvdata(pdev); | |
1112 | ||
1113 | crypto_unregister_alg(&mv_aes_alg_ecb); | |
1114 | crypto_unregister_alg(&mv_aes_alg_cbc); | |
750052dd US |
1115 | if (cp->has_sha1) |
1116 | crypto_unregister_ahash(&mv_sha1_alg); | |
1117 | if (cp->has_hmac_sha1) | |
1118 | crypto_unregister_ahash(&mv_hmac_sha1_alg); | |
85a7f0ac SAS |
1119 | kthread_stop(cp->queue_th); |
1120 | free_irq(cp->irq, cp); | |
1121 | memset(cp->sram, 0, cp->sram_size); | |
1122 | iounmap(cp->sram); | |
1123 | iounmap(cp->reg); | |
1124 | kfree(cp); | |
1125 | cpg = NULL; | |
1126 | return 0; | |
1127 | } | |
1128 | ||
1129 | static struct platform_driver marvell_crypto = { | |
1130 | .probe = mv_probe, | |
1131 | .remove = mv_remove, | |
1132 | .driver = { | |
1133 | .owner = THIS_MODULE, | |
1134 | .name = "mv_crypto", | |
1135 | }, | |
1136 | }; | |
1137 | MODULE_ALIAS("platform:mv_crypto"); | |
1138 | ||
1139 | static int __init mv_crypto_init(void) | |
1140 | { | |
1141 | return platform_driver_register(&marvell_crypto); | |
1142 | } | |
1143 | module_init(mv_crypto_init); | |
1144 | ||
1145 | static void __exit mv_crypto_exit(void) | |
1146 | { | |
1147 | platform_driver_unregister(&marvell_crypto); | |
1148 | } | |
1149 | module_exit(mv_crypto_exit); | |
1150 | ||
1151 | MODULE_AUTHOR("Sebastian Andrzej Siewior <sebastian@breakpoint.cc>"); | |
1152 | MODULE_DESCRIPTION("Support for Marvell's cryptographic engine"); | |
1153 | MODULE_LICENSE("GPL"); |