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ce921368 JI |
1 | /* |
2 | * Copyright (c) 2010-2011 Picochip Ltd., Jamie Iles | |
3 | * | |
4 | * This program is free software; you can redistribute it and/or modify | |
5 | * it under the terms of the GNU General Public License as published by | |
6 | * the Free Software Foundation; either version 2 of the License, or | |
7 | * (at your option) any later version. | |
8 | * | |
9 | * This program is distributed in the hope that it will be useful, | |
10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
12 | * GNU General Public License for more details. | |
13 | * | |
14 | * You should have received a copy of the GNU General Public License | |
15 | * along with this program; if not, write to the Free Software | |
16 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
17 | */ | |
18 | #include <crypto/aead.h> | |
19 | #include <crypto/aes.h> | |
20 | #include <crypto/algapi.h> | |
21 | #include <crypto/authenc.h> | |
22 | #include <crypto/des.h> | |
23 | #include <crypto/md5.h> | |
24 | #include <crypto/sha.h> | |
25 | #include <crypto/internal/skcipher.h> | |
26 | #include <linux/clk.h> | |
27 | #include <linux/crypto.h> | |
28 | #include <linux/delay.h> | |
29 | #include <linux/dma-mapping.h> | |
30 | #include <linux/dmapool.h> | |
31 | #include <linux/err.h> | |
32 | #include <linux/init.h> | |
33 | #include <linux/interrupt.h> | |
34 | #include <linux/io.h> | |
35 | #include <linux/list.h> | |
36 | #include <linux/module.h> | |
30343ef1 | 37 | #include <linux/of.h> |
ce921368 JI |
38 | #include <linux/platform_device.h> |
39 | #include <linux/pm.h> | |
40 | #include <linux/rtnetlink.h> | |
41 | #include <linux/scatterlist.h> | |
42 | #include <linux/sched.h> | |
43 | #include <linux/slab.h> | |
44 | #include <linux/timer.h> | |
45 | ||
46 | #include "picoxcell_crypto_regs.h" | |
47 | ||
48 | /* | |
49 | * The threshold for the number of entries in the CMD FIFO available before | |
50 | * the CMD0_CNT interrupt is raised. Increasing this value will reduce the | |
51 | * number of interrupts raised to the CPU. | |
52 | */ | |
53 | #define CMD0_IRQ_THRESHOLD 1 | |
54 | ||
55 | /* | |
56 | * The timeout period (in jiffies) for a PDU. When the the number of PDUs in | |
57 | * flight is greater than the STAT_IRQ_THRESHOLD or 0 the timer is disabled. | |
58 | * When there are packets in flight but lower than the threshold, we enable | |
59 | * the timer and at expiry, attempt to remove any processed packets from the | |
60 | * queue and if there are still packets left, schedule the timer again. | |
61 | */ | |
62 | #define PACKET_TIMEOUT 1 | |
63 | ||
64 | /* The priority to register each algorithm with. */ | |
65 | #define SPACC_CRYPTO_ALG_PRIORITY 10000 | |
66 | ||
67 | #define SPACC_CRYPTO_KASUMI_F8_KEY_LEN 16 | |
68 | #define SPACC_CRYPTO_IPSEC_CIPHER_PG_SZ 64 | |
69 | #define SPACC_CRYPTO_IPSEC_HASH_PG_SZ 64 | |
70 | #define SPACC_CRYPTO_IPSEC_MAX_CTXS 32 | |
71 | #define SPACC_CRYPTO_IPSEC_FIFO_SZ 32 | |
72 | #define SPACC_CRYPTO_L2_CIPHER_PG_SZ 64 | |
73 | #define SPACC_CRYPTO_L2_HASH_PG_SZ 64 | |
74 | #define SPACC_CRYPTO_L2_MAX_CTXS 128 | |
75 | #define SPACC_CRYPTO_L2_FIFO_SZ 128 | |
76 | ||
77 | #define MAX_DDT_LEN 16 | |
78 | ||
79 | /* DDT format. This must match the hardware DDT format exactly. */ | |
80 | struct spacc_ddt { | |
81 | dma_addr_t p; | |
82 | u32 len; | |
83 | }; | |
84 | ||
85 | /* | |
86 | * Asynchronous crypto request structure. | |
87 | * | |
88 | * This structure defines a request that is either queued for processing or | |
89 | * being processed. | |
90 | */ | |
91 | struct spacc_req { | |
92 | struct list_head list; | |
93 | struct spacc_engine *engine; | |
94 | struct crypto_async_request *req; | |
95 | int result; | |
96 | bool is_encrypt; | |
97 | unsigned ctx_id; | |
98 | dma_addr_t src_addr, dst_addr; | |
99 | struct spacc_ddt *src_ddt, *dst_ddt; | |
100 | void (*complete)(struct spacc_req *req); | |
101 | ||
102 | /* AEAD specific bits. */ | |
103 | u8 *giv; | |
104 | size_t giv_len; | |
105 | dma_addr_t giv_pa; | |
106 | }; | |
107 | ||
108 | struct spacc_engine { | |
109 | void __iomem *regs; | |
110 | struct list_head pending; | |
111 | int next_ctx; | |
112 | spinlock_t hw_lock; | |
113 | int in_flight; | |
114 | struct list_head completed; | |
115 | struct list_head in_progress; | |
116 | struct tasklet_struct complete; | |
117 | unsigned long fifo_sz; | |
118 | void __iomem *cipher_ctx_base; | |
119 | void __iomem *hash_key_base; | |
120 | struct spacc_alg *algs; | |
121 | unsigned num_algs; | |
122 | struct list_head registered_algs; | |
123 | size_t cipher_pg_sz; | |
124 | size_t hash_pg_sz; | |
125 | const char *name; | |
126 | struct clk *clk; | |
127 | struct device *dev; | |
128 | unsigned max_ctxs; | |
129 | struct timer_list packet_timeout; | |
130 | unsigned stat_irq_thresh; | |
131 | struct dma_pool *req_pool; | |
132 | }; | |
133 | ||
134 | /* Algorithm type mask. */ | |
135 | #define SPACC_CRYPTO_ALG_MASK 0x7 | |
136 | ||
137 | /* SPACC definition of a crypto algorithm. */ | |
138 | struct spacc_alg { | |
139 | unsigned long ctrl_default; | |
140 | unsigned long type; | |
141 | struct crypto_alg alg; | |
142 | struct spacc_engine *engine; | |
143 | struct list_head entry; | |
144 | int key_offs; | |
145 | int iv_offs; | |
146 | }; | |
147 | ||
148 | /* Generic context structure for any algorithm type. */ | |
149 | struct spacc_generic_ctx { | |
150 | struct spacc_engine *engine; | |
151 | int flags; | |
152 | int key_offs; | |
153 | int iv_offs; | |
154 | }; | |
155 | ||
156 | /* Block cipher context. */ | |
157 | struct spacc_ablk_ctx { | |
158 | struct spacc_generic_ctx generic; | |
159 | u8 key[AES_MAX_KEY_SIZE]; | |
160 | u8 key_len; | |
161 | /* | |
162 | * The fallback cipher. If the operation can't be done in hardware, | |
163 | * fallback to a software version. | |
164 | */ | |
165 | struct crypto_ablkcipher *sw_cipher; | |
166 | }; | |
167 | ||
168 | /* AEAD cipher context. */ | |
169 | struct spacc_aead_ctx { | |
170 | struct spacc_generic_ctx generic; | |
171 | u8 cipher_key[AES_MAX_KEY_SIZE]; | |
172 | u8 hash_ctx[SPACC_CRYPTO_IPSEC_HASH_PG_SZ]; | |
173 | u8 cipher_key_len; | |
174 | u8 hash_key_len; | |
175 | struct crypto_aead *sw_cipher; | |
176 | size_t auth_size; | |
177 | u8 salt[AES_BLOCK_SIZE]; | |
178 | }; | |
179 | ||
40bfc14f JI |
180 | static int spacc_ablk_submit(struct spacc_req *req); |
181 | ||
ce921368 JI |
182 | static inline struct spacc_alg *to_spacc_alg(struct crypto_alg *alg) |
183 | { | |
184 | return alg ? container_of(alg, struct spacc_alg, alg) : NULL; | |
185 | } | |
186 | ||
187 | static inline int spacc_fifo_cmd_full(struct spacc_engine *engine) | |
188 | { | |
189 | u32 fifo_stat = readl(engine->regs + SPA_FIFO_STAT_REG_OFFSET); | |
190 | ||
191 | return fifo_stat & SPA_FIFO_CMD_FULL; | |
192 | } | |
193 | ||
194 | /* | |
195 | * Given a cipher context, and a context number, get the base address of the | |
196 | * context page. | |
197 | * | |
198 | * Returns the address of the context page where the key/context may | |
199 | * be written. | |
200 | */ | |
201 | static inline void __iomem *spacc_ctx_page_addr(struct spacc_generic_ctx *ctx, | |
202 | unsigned indx, | |
203 | bool is_cipher_ctx) | |
204 | { | |
205 | return is_cipher_ctx ? ctx->engine->cipher_ctx_base + | |
206 | (indx * ctx->engine->cipher_pg_sz) : | |
207 | ctx->engine->hash_key_base + (indx * ctx->engine->hash_pg_sz); | |
208 | } | |
209 | ||
210 | /* The context pages can only be written with 32-bit accesses. */ | |
211 | static inline void memcpy_toio32(u32 __iomem *dst, const void *src, | |
212 | unsigned count) | |
213 | { | |
214 | const u32 *src32 = (const u32 *) src; | |
215 | ||
216 | while (count--) | |
217 | writel(*src32++, dst++); | |
218 | } | |
219 | ||
220 | static void spacc_cipher_write_ctx(struct spacc_generic_ctx *ctx, | |
221 | void __iomem *page_addr, const u8 *key, | |
222 | size_t key_len, const u8 *iv, size_t iv_len) | |
223 | { | |
224 | void __iomem *key_ptr = page_addr + ctx->key_offs; | |
225 | void __iomem *iv_ptr = page_addr + ctx->iv_offs; | |
226 | ||
227 | memcpy_toio32(key_ptr, key, key_len / 4); | |
228 | memcpy_toio32(iv_ptr, iv, iv_len / 4); | |
229 | } | |
230 | ||
231 | /* | |
232 | * Load a context into the engines context memory. | |
233 | * | |
234 | * Returns the index of the context page where the context was loaded. | |
235 | */ | |
236 | static unsigned spacc_load_ctx(struct spacc_generic_ctx *ctx, | |
237 | const u8 *ciph_key, size_t ciph_len, | |
238 | const u8 *iv, size_t ivlen, const u8 *hash_key, | |
239 | size_t hash_len) | |
240 | { | |
241 | unsigned indx = ctx->engine->next_ctx++; | |
242 | void __iomem *ciph_page_addr, *hash_page_addr; | |
243 | ||
244 | ciph_page_addr = spacc_ctx_page_addr(ctx, indx, 1); | |
245 | hash_page_addr = spacc_ctx_page_addr(ctx, indx, 0); | |
246 | ||
247 | ctx->engine->next_ctx &= ctx->engine->fifo_sz - 1; | |
248 | spacc_cipher_write_ctx(ctx, ciph_page_addr, ciph_key, ciph_len, iv, | |
249 | ivlen); | |
250 | writel(ciph_len | (indx << SPA_KEY_SZ_CTX_INDEX_OFFSET) | | |
251 | (1 << SPA_KEY_SZ_CIPHER_OFFSET), | |
252 | ctx->engine->regs + SPA_KEY_SZ_REG_OFFSET); | |
253 | ||
254 | if (hash_key) { | |
255 | memcpy_toio32(hash_page_addr, hash_key, hash_len / 4); | |
256 | writel(hash_len | (indx << SPA_KEY_SZ_CTX_INDEX_OFFSET), | |
257 | ctx->engine->regs + SPA_KEY_SZ_REG_OFFSET); | |
258 | } | |
259 | ||
260 | return indx; | |
261 | } | |
262 | ||
263 | /* Count the number of scatterlist entries in a scatterlist. */ | |
264 | static int sg_count(struct scatterlist *sg_list, int nbytes) | |
265 | { | |
266 | struct scatterlist *sg = sg_list; | |
267 | int sg_nents = 0; | |
268 | ||
269 | while (nbytes > 0) { | |
270 | ++sg_nents; | |
271 | nbytes -= sg->length; | |
272 | sg = sg_next(sg); | |
273 | } | |
274 | ||
275 | return sg_nents; | |
276 | } | |
277 | ||
278 | static inline void ddt_set(struct spacc_ddt *ddt, dma_addr_t phys, size_t len) | |
279 | { | |
280 | ddt->p = phys; | |
281 | ddt->len = len; | |
282 | } | |
283 | ||
284 | /* | |
285 | * Take a crypto request and scatterlists for the data and turn them into DDTs | |
286 | * for passing to the crypto engines. This also DMA maps the data so that the | |
287 | * crypto engines can DMA to/from them. | |
288 | */ | |
289 | static struct spacc_ddt *spacc_sg_to_ddt(struct spacc_engine *engine, | |
290 | struct scatterlist *payload, | |
291 | unsigned nbytes, | |
292 | enum dma_data_direction dir, | |
293 | dma_addr_t *ddt_phys) | |
294 | { | |
295 | unsigned nents, mapped_ents; | |
296 | struct scatterlist *cur; | |
297 | struct spacc_ddt *ddt; | |
298 | int i; | |
299 | ||
300 | nents = sg_count(payload, nbytes); | |
301 | mapped_ents = dma_map_sg(engine->dev, payload, nents, dir); | |
302 | ||
303 | if (mapped_ents + 1 > MAX_DDT_LEN) | |
304 | goto out; | |
305 | ||
306 | ddt = dma_pool_alloc(engine->req_pool, GFP_ATOMIC, ddt_phys); | |
307 | if (!ddt) | |
308 | goto out; | |
309 | ||
310 | for_each_sg(payload, cur, mapped_ents, i) | |
311 | ddt_set(&ddt[i], sg_dma_address(cur), sg_dma_len(cur)); | |
312 | ddt_set(&ddt[mapped_ents], 0, 0); | |
313 | ||
314 | return ddt; | |
315 | ||
316 | out: | |
317 | dma_unmap_sg(engine->dev, payload, nents, dir); | |
318 | return NULL; | |
319 | } | |
320 | ||
321 | static int spacc_aead_make_ddts(struct spacc_req *req, u8 *giv) | |
322 | { | |
323 | struct aead_request *areq = container_of(req->req, struct aead_request, | |
324 | base); | |
325 | struct spacc_engine *engine = req->engine; | |
326 | struct spacc_ddt *src_ddt, *dst_ddt; | |
327 | unsigned ivsize = crypto_aead_ivsize(crypto_aead_reqtfm(areq)); | |
328 | unsigned nents = sg_count(areq->src, areq->cryptlen); | |
329 | dma_addr_t iv_addr; | |
330 | struct scatterlist *cur; | |
331 | int i, dst_ents, src_ents, assoc_ents; | |
332 | u8 *iv = giv ? giv : areq->iv; | |
333 | ||
334 | src_ddt = dma_pool_alloc(engine->req_pool, GFP_ATOMIC, &req->src_addr); | |
335 | if (!src_ddt) | |
336 | return -ENOMEM; | |
337 | ||
338 | dst_ddt = dma_pool_alloc(engine->req_pool, GFP_ATOMIC, &req->dst_addr); | |
339 | if (!dst_ddt) { | |
340 | dma_pool_free(engine->req_pool, src_ddt, req->src_addr); | |
341 | return -ENOMEM; | |
342 | } | |
343 | ||
344 | req->src_ddt = src_ddt; | |
345 | req->dst_ddt = dst_ddt; | |
346 | ||
347 | assoc_ents = dma_map_sg(engine->dev, areq->assoc, | |
348 | sg_count(areq->assoc, areq->assoclen), DMA_TO_DEVICE); | |
349 | if (areq->src != areq->dst) { | |
350 | src_ents = dma_map_sg(engine->dev, areq->src, nents, | |
351 | DMA_TO_DEVICE); | |
352 | dst_ents = dma_map_sg(engine->dev, areq->dst, nents, | |
353 | DMA_FROM_DEVICE); | |
354 | } else { | |
355 | src_ents = dma_map_sg(engine->dev, areq->src, nents, | |
356 | DMA_BIDIRECTIONAL); | |
357 | dst_ents = 0; | |
358 | } | |
359 | ||
360 | /* | |
361 | * Map the IV/GIV. For the GIV it needs to be bidirectional as it is | |
362 | * formed by the crypto block and sent as the ESP IV for IPSEC. | |
363 | */ | |
364 | iv_addr = dma_map_single(engine->dev, iv, ivsize, | |
365 | giv ? DMA_BIDIRECTIONAL : DMA_TO_DEVICE); | |
366 | req->giv_pa = iv_addr; | |
367 | ||
368 | /* | |
369 | * Map the associated data. For decryption we don't copy the | |
370 | * associated data. | |
371 | */ | |
372 | for_each_sg(areq->assoc, cur, assoc_ents, i) { | |
373 | ddt_set(src_ddt++, sg_dma_address(cur), sg_dma_len(cur)); | |
374 | if (req->is_encrypt) | |
375 | ddt_set(dst_ddt++, sg_dma_address(cur), | |
376 | sg_dma_len(cur)); | |
377 | } | |
378 | ddt_set(src_ddt++, iv_addr, ivsize); | |
379 | ||
380 | if (giv || req->is_encrypt) | |
381 | ddt_set(dst_ddt++, iv_addr, ivsize); | |
382 | ||
383 | /* | |
384 | * Now map in the payload for the source and destination and terminate | |
385 | * with the NULL pointers. | |
386 | */ | |
387 | for_each_sg(areq->src, cur, src_ents, i) { | |
388 | ddt_set(src_ddt++, sg_dma_address(cur), sg_dma_len(cur)); | |
389 | if (areq->src == areq->dst) | |
390 | ddt_set(dst_ddt++, sg_dma_address(cur), | |
391 | sg_dma_len(cur)); | |
392 | } | |
393 | ||
394 | for_each_sg(areq->dst, cur, dst_ents, i) | |
395 | ddt_set(dst_ddt++, sg_dma_address(cur), | |
396 | sg_dma_len(cur)); | |
397 | ||
398 | ddt_set(src_ddt, 0, 0); | |
399 | ddt_set(dst_ddt, 0, 0); | |
400 | ||
401 | return 0; | |
402 | } | |
403 | ||
404 | static void spacc_aead_free_ddts(struct spacc_req *req) | |
405 | { | |
406 | struct aead_request *areq = container_of(req->req, struct aead_request, | |
407 | base); | |
408 | struct spacc_alg *alg = to_spacc_alg(req->req->tfm->__crt_alg); | |
409 | struct spacc_ablk_ctx *aead_ctx = crypto_tfm_ctx(req->req->tfm); | |
410 | struct spacc_engine *engine = aead_ctx->generic.engine; | |
411 | unsigned ivsize = alg->alg.cra_aead.ivsize; | |
412 | unsigned nents = sg_count(areq->src, areq->cryptlen); | |
413 | ||
414 | if (areq->src != areq->dst) { | |
415 | dma_unmap_sg(engine->dev, areq->src, nents, DMA_TO_DEVICE); | |
416 | dma_unmap_sg(engine->dev, areq->dst, | |
417 | sg_count(areq->dst, areq->cryptlen), | |
418 | DMA_FROM_DEVICE); | |
419 | } else | |
420 | dma_unmap_sg(engine->dev, areq->src, nents, DMA_BIDIRECTIONAL); | |
421 | ||
422 | dma_unmap_sg(engine->dev, areq->assoc, | |
423 | sg_count(areq->assoc, areq->assoclen), DMA_TO_DEVICE); | |
424 | ||
425 | dma_unmap_single(engine->dev, req->giv_pa, ivsize, DMA_BIDIRECTIONAL); | |
426 | ||
427 | dma_pool_free(engine->req_pool, req->src_ddt, req->src_addr); | |
428 | dma_pool_free(engine->req_pool, req->dst_ddt, req->dst_addr); | |
429 | } | |
430 | ||
431 | static void spacc_free_ddt(struct spacc_req *req, struct spacc_ddt *ddt, | |
432 | dma_addr_t ddt_addr, struct scatterlist *payload, | |
433 | unsigned nbytes, enum dma_data_direction dir) | |
434 | { | |
435 | unsigned nents = sg_count(payload, nbytes); | |
436 | ||
437 | dma_unmap_sg(req->engine->dev, payload, nents, dir); | |
438 | dma_pool_free(req->engine->req_pool, ddt, ddt_addr); | |
439 | } | |
440 | ||
441 | /* | |
442 | * Set key for a DES operation in an AEAD cipher. This also performs weak key | |
443 | * checking if required. | |
444 | */ | |
445 | static int spacc_aead_des_setkey(struct crypto_aead *aead, const u8 *key, | |
446 | unsigned int len) | |
447 | { | |
448 | struct crypto_tfm *tfm = crypto_aead_tfm(aead); | |
449 | struct spacc_aead_ctx *ctx = crypto_tfm_ctx(tfm); | |
450 | u32 tmp[DES_EXPKEY_WORDS]; | |
451 | ||
452 | if (unlikely(!des_ekey(tmp, key)) && | |
453 | (crypto_aead_get_flags(aead)) & CRYPTO_TFM_REQ_WEAK_KEY) { | |
454 | tfm->crt_flags |= CRYPTO_TFM_RES_WEAK_KEY; | |
455 | return -EINVAL; | |
456 | } | |
457 | ||
458 | memcpy(ctx->cipher_key, key, len); | |
459 | ctx->cipher_key_len = len; | |
460 | ||
461 | return 0; | |
462 | } | |
463 | ||
464 | /* Set the key for the AES block cipher component of the AEAD transform. */ | |
465 | static int spacc_aead_aes_setkey(struct crypto_aead *aead, const u8 *key, | |
466 | unsigned int len) | |
467 | { | |
468 | struct crypto_tfm *tfm = crypto_aead_tfm(aead); | |
469 | struct spacc_aead_ctx *ctx = crypto_tfm_ctx(tfm); | |
470 | ||
471 | /* | |
472 | * IPSec engine only supports 128 and 256 bit AES keys. If we get a | |
473 | * request for any other size (192 bits) then we need to do a software | |
474 | * fallback. | |
475 | */ | |
476 | if (len != AES_KEYSIZE_128 && len != AES_KEYSIZE_256) { | |
477 | /* | |
478 | * Set the fallback transform to use the same request flags as | |
479 | * the hardware transform. | |
480 | */ | |
481 | ctx->sw_cipher->base.crt_flags &= ~CRYPTO_TFM_REQ_MASK; | |
482 | ctx->sw_cipher->base.crt_flags |= | |
483 | tfm->crt_flags & CRYPTO_TFM_REQ_MASK; | |
484 | return crypto_aead_setkey(ctx->sw_cipher, key, len); | |
485 | } | |
486 | ||
487 | memcpy(ctx->cipher_key, key, len); | |
488 | ctx->cipher_key_len = len; | |
489 | ||
490 | return 0; | |
491 | } | |
492 | ||
493 | static int spacc_aead_setkey(struct crypto_aead *tfm, const u8 *key, | |
494 | unsigned int keylen) | |
495 | { | |
496 | struct spacc_aead_ctx *ctx = crypto_aead_ctx(tfm); | |
497 | struct spacc_alg *alg = to_spacc_alg(tfm->base.__crt_alg); | |
ab827fb3 | 498 | struct crypto_authenc_keys keys; |
ce921368 JI |
499 | int err = -EINVAL; |
500 | ||
ab827fb3 | 501 | if (crypto_authenc_extractkeys(&keys, key, keylen) != 0) |
ce921368 JI |
502 | goto badkey; |
503 | ||
ab827fb3 | 504 | if (keys.enckeylen > AES_MAX_KEY_SIZE) |
ce921368 JI |
505 | goto badkey; |
506 | ||
ab827fb3 | 507 | if (keys.authkeylen > sizeof(ctx->hash_ctx)) |
ce921368 JI |
508 | goto badkey; |
509 | ||
510 | if ((alg->ctrl_default & SPACC_CRYPTO_ALG_MASK) == | |
511 | SPA_CTRL_CIPH_ALG_AES) | |
ab827fb3 | 512 | err = spacc_aead_aes_setkey(tfm, keys.enckey, keys.enckeylen); |
ce921368 | 513 | else |
ab827fb3 | 514 | err = spacc_aead_des_setkey(tfm, keys.enckey, keys.enckeylen); |
ce921368 JI |
515 | |
516 | if (err) | |
517 | goto badkey; | |
518 | ||
ab827fb3 MK |
519 | memcpy(ctx->hash_ctx, keys.authkey, keys.authkeylen); |
520 | ctx->hash_key_len = keys.authkeylen; | |
ce921368 JI |
521 | |
522 | return 0; | |
523 | ||
524 | badkey: | |
525 | crypto_aead_set_flags(tfm, CRYPTO_TFM_RES_BAD_KEY_LEN); | |
526 | return -EINVAL; | |
527 | } | |
528 | ||
529 | static int spacc_aead_setauthsize(struct crypto_aead *tfm, | |
530 | unsigned int authsize) | |
531 | { | |
532 | struct spacc_aead_ctx *ctx = crypto_tfm_ctx(crypto_aead_tfm(tfm)); | |
533 | ||
534 | ctx->auth_size = authsize; | |
535 | ||
536 | return 0; | |
537 | } | |
538 | ||
539 | /* | |
540 | * Check if an AEAD request requires a fallback operation. Some requests can't | |
541 | * be completed in hardware because the hardware may not support certain key | |
542 | * sizes. In these cases we need to complete the request in software. | |
543 | */ | |
544 | static int spacc_aead_need_fallback(struct spacc_req *req) | |
545 | { | |
546 | struct aead_request *aead_req; | |
547 | struct crypto_tfm *tfm = req->req->tfm; | |
548 | struct crypto_alg *alg = req->req->tfm->__crt_alg; | |
549 | struct spacc_alg *spacc_alg = to_spacc_alg(alg); | |
550 | struct spacc_aead_ctx *ctx = crypto_tfm_ctx(tfm); | |
551 | ||
552 | aead_req = container_of(req->req, struct aead_request, base); | |
553 | /* | |
554 | * If we have a non-supported key-length, then we need to do a | |
555 | * software fallback. | |
556 | */ | |
557 | if ((spacc_alg->ctrl_default & SPACC_CRYPTO_ALG_MASK) == | |
558 | SPA_CTRL_CIPH_ALG_AES && | |
559 | ctx->cipher_key_len != AES_KEYSIZE_128 && | |
560 | ctx->cipher_key_len != AES_KEYSIZE_256) | |
561 | return 1; | |
562 | ||
563 | return 0; | |
564 | } | |
565 | ||
566 | static int spacc_aead_do_fallback(struct aead_request *req, unsigned alg_type, | |
567 | bool is_encrypt) | |
568 | { | |
569 | struct crypto_tfm *old_tfm = crypto_aead_tfm(crypto_aead_reqtfm(req)); | |
570 | struct spacc_aead_ctx *ctx = crypto_tfm_ctx(old_tfm); | |
571 | int err; | |
572 | ||
573 | if (ctx->sw_cipher) { | |
574 | /* | |
575 | * Change the request to use the software fallback transform, | |
576 | * and once the ciphering has completed, put the old transform | |
577 | * back into the request. | |
578 | */ | |
579 | aead_request_set_tfm(req, ctx->sw_cipher); | |
580 | err = is_encrypt ? crypto_aead_encrypt(req) : | |
581 | crypto_aead_decrypt(req); | |
582 | aead_request_set_tfm(req, __crypto_aead_cast(old_tfm)); | |
583 | } else | |
584 | err = -EINVAL; | |
585 | ||
586 | return err; | |
587 | } | |
588 | ||
589 | static void spacc_aead_complete(struct spacc_req *req) | |
590 | { | |
591 | spacc_aead_free_ddts(req); | |
592 | req->req->complete(req->req, req->result); | |
593 | } | |
594 | ||
595 | static int spacc_aead_submit(struct spacc_req *req) | |
596 | { | |
597 | struct crypto_tfm *tfm = req->req->tfm; | |
598 | struct spacc_aead_ctx *ctx = crypto_tfm_ctx(tfm); | |
599 | struct crypto_alg *alg = req->req->tfm->__crt_alg; | |
600 | struct spacc_alg *spacc_alg = to_spacc_alg(alg); | |
601 | struct spacc_engine *engine = ctx->generic.engine; | |
602 | u32 ctrl, proc_len, assoc_len; | |
603 | struct aead_request *aead_req = | |
604 | container_of(req->req, struct aead_request, base); | |
605 | ||
606 | req->result = -EINPROGRESS; | |
607 | req->ctx_id = spacc_load_ctx(&ctx->generic, ctx->cipher_key, | |
608 | ctx->cipher_key_len, aead_req->iv, alg->cra_aead.ivsize, | |
609 | ctx->hash_ctx, ctx->hash_key_len); | |
610 | ||
611 | /* Set the source and destination DDT pointers. */ | |
612 | writel(req->src_addr, engine->regs + SPA_SRC_PTR_REG_OFFSET); | |
613 | writel(req->dst_addr, engine->regs + SPA_DST_PTR_REG_OFFSET); | |
614 | writel(0, engine->regs + SPA_OFFSET_REG_OFFSET); | |
615 | ||
616 | assoc_len = aead_req->assoclen; | |
617 | proc_len = aead_req->cryptlen + assoc_len; | |
618 | ||
619 | /* | |
620 | * If we aren't generating an IV, then we need to include the IV in the | |
621 | * associated data so that it is included in the hash. | |
622 | */ | |
623 | if (!req->giv) { | |
624 | assoc_len += crypto_aead_ivsize(crypto_aead_reqtfm(aead_req)); | |
625 | proc_len += crypto_aead_ivsize(crypto_aead_reqtfm(aead_req)); | |
626 | } else | |
627 | proc_len += req->giv_len; | |
628 | ||
629 | /* | |
630 | * If we are decrypting, we need to take the length of the ICV out of | |
631 | * the processing length. | |
632 | */ | |
633 | if (!req->is_encrypt) | |
634 | proc_len -= ctx->auth_size; | |
635 | ||
636 | writel(proc_len, engine->regs + SPA_PROC_LEN_REG_OFFSET); | |
637 | writel(assoc_len, engine->regs + SPA_AAD_LEN_REG_OFFSET); | |
638 | writel(ctx->auth_size, engine->regs + SPA_ICV_LEN_REG_OFFSET); | |
639 | writel(0, engine->regs + SPA_ICV_OFFSET_REG_OFFSET); | |
640 | writel(0, engine->regs + SPA_AUX_INFO_REG_OFFSET); | |
641 | ||
642 | ctrl = spacc_alg->ctrl_default | (req->ctx_id << SPA_CTRL_CTX_IDX) | | |
643 | (1 << SPA_CTRL_ICV_APPEND); | |
644 | if (req->is_encrypt) | |
645 | ctrl |= (1 << SPA_CTRL_ENCRYPT_IDX) | (1 << SPA_CTRL_AAD_COPY); | |
646 | else | |
647 | ctrl |= (1 << SPA_CTRL_KEY_EXP); | |
648 | ||
649 | mod_timer(&engine->packet_timeout, jiffies + PACKET_TIMEOUT); | |
650 | ||
651 | writel(ctrl, engine->regs + SPA_CTRL_REG_OFFSET); | |
652 | ||
653 | return -EINPROGRESS; | |
654 | } | |
655 | ||
40bfc14f JI |
656 | static int spacc_req_submit(struct spacc_req *req); |
657 | ||
658 | static void spacc_push(struct spacc_engine *engine) | |
659 | { | |
660 | struct spacc_req *req; | |
661 | ||
662 | while (!list_empty(&engine->pending) && | |
663 | engine->in_flight + 1 <= engine->fifo_sz) { | |
664 | ||
665 | ++engine->in_flight; | |
666 | req = list_first_entry(&engine->pending, struct spacc_req, | |
667 | list); | |
668 | list_move_tail(&req->list, &engine->in_progress); | |
669 | ||
670 | req->result = spacc_req_submit(req); | |
671 | } | |
672 | } | |
673 | ||
ce921368 JI |
674 | /* |
675 | * Setup an AEAD request for processing. This will configure the engine, load | |
676 | * the context and then start the packet processing. | |
677 | * | |
678 | * @giv Pointer to destination address for a generated IV. If the | |
679 | * request does not need to generate an IV then this should be set to NULL. | |
680 | */ | |
681 | static int spacc_aead_setup(struct aead_request *req, u8 *giv, | |
682 | unsigned alg_type, bool is_encrypt) | |
683 | { | |
684 | struct crypto_alg *alg = req->base.tfm->__crt_alg; | |
685 | struct spacc_engine *engine = to_spacc_alg(alg)->engine; | |
686 | struct spacc_req *dev_req = aead_request_ctx(req); | |
687 | int err = -EINPROGRESS; | |
688 | unsigned long flags; | |
689 | unsigned ivsize = crypto_aead_ivsize(crypto_aead_reqtfm(req)); | |
690 | ||
691 | dev_req->giv = giv; | |
692 | dev_req->giv_len = ivsize; | |
693 | dev_req->req = &req->base; | |
694 | dev_req->is_encrypt = is_encrypt; | |
695 | dev_req->result = -EBUSY; | |
696 | dev_req->engine = engine; | |
697 | dev_req->complete = spacc_aead_complete; | |
698 | ||
699 | if (unlikely(spacc_aead_need_fallback(dev_req))) | |
700 | return spacc_aead_do_fallback(req, alg_type, is_encrypt); | |
701 | ||
702 | spacc_aead_make_ddts(dev_req, dev_req->giv); | |
703 | ||
704 | err = -EINPROGRESS; | |
705 | spin_lock_irqsave(&engine->hw_lock, flags); | |
40bfc14f JI |
706 | if (unlikely(spacc_fifo_cmd_full(engine)) || |
707 | engine->in_flight + 1 > engine->fifo_sz) { | |
ce921368 JI |
708 | if (!(req->base.flags & CRYPTO_TFM_REQ_MAY_BACKLOG)) { |
709 | err = -EBUSY; | |
710 | spin_unlock_irqrestore(&engine->hw_lock, flags); | |
711 | goto out_free_ddts; | |
712 | } | |
713 | list_add_tail(&dev_req->list, &engine->pending); | |
714 | } else { | |
40bfc14f JI |
715 | list_add_tail(&dev_req->list, &engine->pending); |
716 | spacc_push(engine); | |
ce921368 JI |
717 | } |
718 | spin_unlock_irqrestore(&engine->hw_lock, flags); | |
719 | ||
720 | goto out; | |
721 | ||
722 | out_free_ddts: | |
723 | spacc_aead_free_ddts(dev_req); | |
724 | out: | |
725 | return err; | |
726 | } | |
727 | ||
728 | static int spacc_aead_encrypt(struct aead_request *req) | |
729 | { | |
730 | struct crypto_aead *aead = crypto_aead_reqtfm(req); | |
731 | struct crypto_tfm *tfm = crypto_aead_tfm(aead); | |
732 | struct spacc_alg *alg = to_spacc_alg(tfm->__crt_alg); | |
733 | ||
734 | return spacc_aead_setup(req, NULL, alg->type, 1); | |
735 | } | |
736 | ||
737 | static int spacc_aead_givencrypt(struct aead_givcrypt_request *req) | |
738 | { | |
739 | struct crypto_aead *tfm = aead_givcrypt_reqtfm(req); | |
740 | struct spacc_aead_ctx *ctx = crypto_aead_ctx(tfm); | |
741 | size_t ivsize = crypto_aead_ivsize(tfm); | |
742 | struct spacc_alg *alg = to_spacc_alg(tfm->base.__crt_alg); | |
743 | unsigned len; | |
744 | __be64 seq; | |
745 | ||
746 | memcpy(req->areq.iv, ctx->salt, ivsize); | |
747 | len = ivsize; | |
748 | if (ivsize > sizeof(u64)) { | |
749 | memset(req->giv, 0, ivsize - sizeof(u64)); | |
750 | len = sizeof(u64); | |
751 | } | |
752 | seq = cpu_to_be64(req->seq); | |
753 | memcpy(req->giv + ivsize - len, &seq, len); | |
754 | ||
755 | return spacc_aead_setup(&req->areq, req->giv, alg->type, 1); | |
756 | } | |
757 | ||
758 | static int spacc_aead_decrypt(struct aead_request *req) | |
759 | { | |
760 | struct crypto_aead *aead = crypto_aead_reqtfm(req); | |
761 | struct crypto_tfm *tfm = crypto_aead_tfm(aead); | |
762 | struct spacc_alg *alg = to_spacc_alg(tfm->__crt_alg); | |
763 | ||
764 | return spacc_aead_setup(req, NULL, alg->type, 0); | |
765 | } | |
766 | ||
767 | /* | |
768 | * Initialise a new AEAD context. This is responsible for allocating the | |
769 | * fallback cipher and initialising the context. | |
770 | */ | |
771 | static int spacc_aead_cra_init(struct crypto_tfm *tfm) | |
772 | { | |
773 | struct spacc_aead_ctx *ctx = crypto_tfm_ctx(tfm); | |
774 | struct crypto_alg *alg = tfm->__crt_alg; | |
775 | struct spacc_alg *spacc_alg = to_spacc_alg(alg); | |
776 | struct spacc_engine *engine = spacc_alg->engine; | |
777 | ||
778 | ctx->generic.flags = spacc_alg->type; | |
779 | ctx->generic.engine = engine; | |
780 | ctx->sw_cipher = crypto_alloc_aead(alg->cra_name, 0, | |
781 | CRYPTO_ALG_ASYNC | | |
782 | CRYPTO_ALG_NEED_FALLBACK); | |
783 | if (IS_ERR(ctx->sw_cipher)) { | |
784 | dev_warn(engine->dev, "failed to allocate fallback for %s\n", | |
785 | alg->cra_name); | |
786 | ctx->sw_cipher = NULL; | |
787 | } | |
788 | ctx->generic.key_offs = spacc_alg->key_offs; | |
789 | ctx->generic.iv_offs = spacc_alg->iv_offs; | |
790 | ||
791 | get_random_bytes(ctx->salt, sizeof(ctx->salt)); | |
792 | ||
793 | tfm->crt_aead.reqsize = sizeof(struct spacc_req); | |
794 | ||
795 | return 0; | |
796 | } | |
797 | ||
798 | /* | |
799 | * Destructor for an AEAD context. This is called when the transform is freed | |
800 | * and must free the fallback cipher. | |
801 | */ | |
802 | static void spacc_aead_cra_exit(struct crypto_tfm *tfm) | |
803 | { | |
804 | struct spacc_aead_ctx *ctx = crypto_tfm_ctx(tfm); | |
805 | ||
806 | if (ctx->sw_cipher) | |
807 | crypto_free_aead(ctx->sw_cipher); | |
808 | ctx->sw_cipher = NULL; | |
809 | } | |
810 | ||
811 | /* | |
812 | * Set the DES key for a block cipher transform. This also performs weak key | |
813 | * checking if the transform has requested it. | |
814 | */ | |
815 | static int spacc_des_setkey(struct crypto_ablkcipher *cipher, const u8 *key, | |
816 | unsigned int len) | |
817 | { | |
818 | struct crypto_tfm *tfm = crypto_ablkcipher_tfm(cipher); | |
819 | struct spacc_ablk_ctx *ctx = crypto_tfm_ctx(tfm); | |
820 | u32 tmp[DES_EXPKEY_WORDS]; | |
821 | ||
822 | if (len > DES3_EDE_KEY_SIZE) { | |
823 | crypto_ablkcipher_set_flags(cipher, CRYPTO_TFM_RES_BAD_KEY_LEN); | |
824 | return -EINVAL; | |
825 | } | |
826 | ||
827 | if (unlikely(!des_ekey(tmp, key)) && | |
828 | (crypto_ablkcipher_get_flags(cipher) & CRYPTO_TFM_REQ_WEAK_KEY)) { | |
829 | tfm->crt_flags |= CRYPTO_TFM_RES_WEAK_KEY; | |
830 | return -EINVAL; | |
831 | } | |
832 | ||
833 | memcpy(ctx->key, key, len); | |
834 | ctx->key_len = len; | |
835 | ||
836 | return 0; | |
837 | } | |
838 | ||
839 | /* | |
840 | * Set the key for an AES block cipher. Some key lengths are not supported in | |
841 | * hardware so this must also check whether a fallback is needed. | |
842 | */ | |
843 | static int spacc_aes_setkey(struct crypto_ablkcipher *cipher, const u8 *key, | |
844 | unsigned int len) | |
845 | { | |
846 | struct crypto_tfm *tfm = crypto_ablkcipher_tfm(cipher); | |
847 | struct spacc_ablk_ctx *ctx = crypto_tfm_ctx(tfm); | |
848 | int err = 0; | |
849 | ||
850 | if (len > AES_MAX_KEY_SIZE) { | |
851 | crypto_ablkcipher_set_flags(cipher, CRYPTO_TFM_RES_BAD_KEY_LEN); | |
852 | return -EINVAL; | |
853 | } | |
854 | ||
855 | /* | |
856 | * IPSec engine only supports 128 and 256 bit AES keys. If we get a | |
857 | * request for any other size (192 bits) then we need to do a software | |
858 | * fallback. | |
859 | */ | |
a9c57a9c | 860 | if (len != AES_KEYSIZE_128 && len != AES_KEYSIZE_256 && |
ce921368 JI |
861 | ctx->sw_cipher) { |
862 | /* | |
863 | * Set the fallback transform to use the same request flags as | |
864 | * the hardware transform. | |
865 | */ | |
866 | ctx->sw_cipher->base.crt_flags &= ~CRYPTO_TFM_REQ_MASK; | |
867 | ctx->sw_cipher->base.crt_flags |= | |
868 | cipher->base.crt_flags & CRYPTO_TFM_REQ_MASK; | |
869 | ||
870 | err = crypto_ablkcipher_setkey(ctx->sw_cipher, key, len); | |
871 | if (err) | |
872 | goto sw_setkey_failed; | |
a9c57a9c | 873 | } else if (len != AES_KEYSIZE_128 && len != AES_KEYSIZE_256 && |
ce921368 JI |
874 | !ctx->sw_cipher) |
875 | err = -EINVAL; | |
876 | ||
877 | memcpy(ctx->key, key, len); | |
878 | ctx->key_len = len; | |
879 | ||
880 | sw_setkey_failed: | |
881 | if (err && ctx->sw_cipher) { | |
882 | tfm->crt_flags &= ~CRYPTO_TFM_RES_MASK; | |
883 | tfm->crt_flags |= | |
884 | ctx->sw_cipher->base.crt_flags & CRYPTO_TFM_RES_MASK; | |
885 | } | |
886 | ||
887 | return err; | |
888 | } | |
889 | ||
890 | static int spacc_kasumi_f8_setkey(struct crypto_ablkcipher *cipher, | |
891 | const u8 *key, unsigned int len) | |
892 | { | |
893 | struct crypto_tfm *tfm = crypto_ablkcipher_tfm(cipher); | |
894 | struct spacc_ablk_ctx *ctx = crypto_tfm_ctx(tfm); | |
895 | int err = 0; | |
896 | ||
897 | if (len > AES_MAX_KEY_SIZE) { | |
898 | crypto_ablkcipher_set_flags(cipher, CRYPTO_TFM_RES_BAD_KEY_LEN); | |
899 | err = -EINVAL; | |
900 | goto out; | |
901 | } | |
902 | ||
903 | memcpy(ctx->key, key, len); | |
904 | ctx->key_len = len; | |
905 | ||
906 | out: | |
907 | return err; | |
908 | } | |
909 | ||
910 | static int spacc_ablk_need_fallback(struct spacc_req *req) | |
911 | { | |
912 | struct spacc_ablk_ctx *ctx; | |
913 | struct crypto_tfm *tfm = req->req->tfm; | |
914 | struct crypto_alg *alg = req->req->tfm->__crt_alg; | |
915 | struct spacc_alg *spacc_alg = to_spacc_alg(alg); | |
916 | ||
917 | ctx = crypto_tfm_ctx(tfm); | |
918 | ||
919 | return (spacc_alg->ctrl_default & SPACC_CRYPTO_ALG_MASK) == | |
920 | SPA_CTRL_CIPH_ALG_AES && | |
921 | ctx->key_len != AES_KEYSIZE_128 && | |
922 | ctx->key_len != AES_KEYSIZE_256; | |
923 | } | |
924 | ||
925 | static void spacc_ablk_complete(struct spacc_req *req) | |
926 | { | |
927 | struct ablkcipher_request *ablk_req = | |
928 | container_of(req->req, struct ablkcipher_request, base); | |
929 | ||
930 | if (ablk_req->src != ablk_req->dst) { | |
931 | spacc_free_ddt(req, req->src_ddt, req->src_addr, ablk_req->src, | |
932 | ablk_req->nbytes, DMA_TO_DEVICE); | |
933 | spacc_free_ddt(req, req->dst_ddt, req->dst_addr, ablk_req->dst, | |
934 | ablk_req->nbytes, DMA_FROM_DEVICE); | |
935 | } else | |
936 | spacc_free_ddt(req, req->dst_ddt, req->dst_addr, ablk_req->dst, | |
937 | ablk_req->nbytes, DMA_BIDIRECTIONAL); | |
938 | ||
939 | req->req->complete(req->req, req->result); | |
940 | } | |
941 | ||
942 | static int spacc_ablk_submit(struct spacc_req *req) | |
943 | { | |
944 | struct crypto_tfm *tfm = req->req->tfm; | |
945 | struct spacc_ablk_ctx *ctx = crypto_tfm_ctx(tfm); | |
946 | struct ablkcipher_request *ablk_req = ablkcipher_request_cast(req->req); | |
947 | struct crypto_alg *alg = req->req->tfm->__crt_alg; | |
948 | struct spacc_alg *spacc_alg = to_spacc_alg(alg); | |
949 | struct spacc_engine *engine = ctx->generic.engine; | |
950 | u32 ctrl; | |
951 | ||
952 | req->ctx_id = spacc_load_ctx(&ctx->generic, ctx->key, | |
953 | ctx->key_len, ablk_req->info, alg->cra_ablkcipher.ivsize, | |
954 | NULL, 0); | |
955 | ||
956 | writel(req->src_addr, engine->regs + SPA_SRC_PTR_REG_OFFSET); | |
957 | writel(req->dst_addr, engine->regs + SPA_DST_PTR_REG_OFFSET); | |
958 | writel(0, engine->regs + SPA_OFFSET_REG_OFFSET); | |
959 | ||
960 | writel(ablk_req->nbytes, engine->regs + SPA_PROC_LEN_REG_OFFSET); | |
961 | writel(0, engine->regs + SPA_ICV_OFFSET_REG_OFFSET); | |
962 | writel(0, engine->regs + SPA_AUX_INFO_REG_OFFSET); | |
963 | writel(0, engine->regs + SPA_AAD_LEN_REG_OFFSET); | |
964 | ||
965 | ctrl = spacc_alg->ctrl_default | (req->ctx_id << SPA_CTRL_CTX_IDX) | | |
966 | (req->is_encrypt ? (1 << SPA_CTRL_ENCRYPT_IDX) : | |
967 | (1 << SPA_CTRL_KEY_EXP)); | |
968 | ||
969 | mod_timer(&engine->packet_timeout, jiffies + PACKET_TIMEOUT); | |
970 | ||
971 | writel(ctrl, engine->regs + SPA_CTRL_REG_OFFSET); | |
972 | ||
973 | return -EINPROGRESS; | |
974 | } | |
975 | ||
976 | static int spacc_ablk_do_fallback(struct ablkcipher_request *req, | |
977 | unsigned alg_type, bool is_encrypt) | |
978 | { | |
979 | struct crypto_tfm *old_tfm = | |
980 | crypto_ablkcipher_tfm(crypto_ablkcipher_reqtfm(req)); | |
981 | struct spacc_ablk_ctx *ctx = crypto_tfm_ctx(old_tfm); | |
982 | int err; | |
983 | ||
984 | if (!ctx->sw_cipher) | |
985 | return -EINVAL; | |
986 | ||
987 | /* | |
988 | * Change the request to use the software fallback transform, and once | |
989 | * the ciphering has completed, put the old transform back into the | |
990 | * request. | |
991 | */ | |
992 | ablkcipher_request_set_tfm(req, ctx->sw_cipher); | |
993 | err = is_encrypt ? crypto_ablkcipher_encrypt(req) : | |
994 | crypto_ablkcipher_decrypt(req); | |
995 | ablkcipher_request_set_tfm(req, __crypto_ablkcipher_cast(old_tfm)); | |
996 | ||
997 | return err; | |
998 | } | |
999 | ||
1000 | static int spacc_ablk_setup(struct ablkcipher_request *req, unsigned alg_type, | |
1001 | bool is_encrypt) | |
1002 | { | |
1003 | struct crypto_alg *alg = req->base.tfm->__crt_alg; | |
1004 | struct spacc_engine *engine = to_spacc_alg(alg)->engine; | |
1005 | struct spacc_req *dev_req = ablkcipher_request_ctx(req); | |
1006 | unsigned long flags; | |
1007 | int err = -ENOMEM; | |
1008 | ||
1009 | dev_req->req = &req->base; | |
1010 | dev_req->is_encrypt = is_encrypt; | |
1011 | dev_req->engine = engine; | |
1012 | dev_req->complete = spacc_ablk_complete; | |
1013 | dev_req->result = -EINPROGRESS; | |
1014 | ||
1015 | if (unlikely(spacc_ablk_need_fallback(dev_req))) | |
1016 | return spacc_ablk_do_fallback(req, alg_type, is_encrypt); | |
1017 | ||
1018 | /* | |
1019 | * Create the DDT's for the engine. If we share the same source and | |
1020 | * destination then we can optimize by reusing the DDT's. | |
1021 | */ | |
1022 | if (req->src != req->dst) { | |
1023 | dev_req->src_ddt = spacc_sg_to_ddt(engine, req->src, | |
1024 | req->nbytes, DMA_TO_DEVICE, &dev_req->src_addr); | |
1025 | if (!dev_req->src_ddt) | |
1026 | goto out; | |
1027 | ||
1028 | dev_req->dst_ddt = spacc_sg_to_ddt(engine, req->dst, | |
1029 | req->nbytes, DMA_FROM_DEVICE, &dev_req->dst_addr); | |
1030 | if (!dev_req->dst_ddt) | |
1031 | goto out_free_src; | |
1032 | } else { | |
1033 | dev_req->dst_ddt = spacc_sg_to_ddt(engine, req->dst, | |
1034 | req->nbytes, DMA_BIDIRECTIONAL, &dev_req->dst_addr); | |
1035 | if (!dev_req->dst_ddt) | |
1036 | goto out; | |
1037 | ||
1038 | dev_req->src_ddt = NULL; | |
1039 | dev_req->src_addr = dev_req->dst_addr; | |
1040 | } | |
1041 | ||
1042 | err = -EINPROGRESS; | |
1043 | spin_lock_irqsave(&engine->hw_lock, flags); | |
1044 | /* | |
1045 | * Check if the engine will accept the operation now. If it won't then | |
1046 | * we either stick it on the end of a pending list if we can backlog, | |
1047 | * or bailout with an error if not. | |
1048 | */ | |
40bfc14f JI |
1049 | if (unlikely(spacc_fifo_cmd_full(engine)) || |
1050 | engine->in_flight + 1 > engine->fifo_sz) { | |
ce921368 JI |
1051 | if (!(req->base.flags & CRYPTO_TFM_REQ_MAY_BACKLOG)) { |
1052 | err = -EBUSY; | |
1053 | spin_unlock_irqrestore(&engine->hw_lock, flags); | |
1054 | goto out_free_ddts; | |
1055 | } | |
1056 | list_add_tail(&dev_req->list, &engine->pending); | |
1057 | } else { | |
40bfc14f JI |
1058 | list_add_tail(&dev_req->list, &engine->pending); |
1059 | spacc_push(engine); | |
ce921368 JI |
1060 | } |
1061 | spin_unlock_irqrestore(&engine->hw_lock, flags); | |
1062 | ||
1063 | goto out; | |
1064 | ||
1065 | out_free_ddts: | |
1066 | spacc_free_ddt(dev_req, dev_req->dst_ddt, dev_req->dst_addr, req->dst, | |
1067 | req->nbytes, req->src == req->dst ? | |
1068 | DMA_BIDIRECTIONAL : DMA_FROM_DEVICE); | |
1069 | out_free_src: | |
1070 | if (req->src != req->dst) | |
1071 | spacc_free_ddt(dev_req, dev_req->src_ddt, dev_req->src_addr, | |
1072 | req->src, req->nbytes, DMA_TO_DEVICE); | |
1073 | out: | |
1074 | return err; | |
1075 | } | |
1076 | ||
1077 | static int spacc_ablk_cra_init(struct crypto_tfm *tfm) | |
1078 | { | |
1079 | struct spacc_ablk_ctx *ctx = crypto_tfm_ctx(tfm); | |
1080 | struct crypto_alg *alg = tfm->__crt_alg; | |
1081 | struct spacc_alg *spacc_alg = to_spacc_alg(alg); | |
1082 | struct spacc_engine *engine = spacc_alg->engine; | |
1083 | ||
1084 | ctx->generic.flags = spacc_alg->type; | |
1085 | ctx->generic.engine = engine; | |
1086 | if (alg->cra_flags & CRYPTO_ALG_NEED_FALLBACK) { | |
1087 | ctx->sw_cipher = crypto_alloc_ablkcipher(alg->cra_name, 0, | |
1088 | CRYPTO_ALG_ASYNC | CRYPTO_ALG_NEED_FALLBACK); | |
1089 | if (IS_ERR(ctx->sw_cipher)) { | |
1090 | dev_warn(engine->dev, "failed to allocate fallback for %s\n", | |
1091 | alg->cra_name); | |
1092 | ctx->sw_cipher = NULL; | |
1093 | } | |
1094 | } | |
1095 | ctx->generic.key_offs = spacc_alg->key_offs; | |
1096 | ctx->generic.iv_offs = spacc_alg->iv_offs; | |
1097 | ||
1098 | tfm->crt_ablkcipher.reqsize = sizeof(struct spacc_req); | |
1099 | ||
1100 | return 0; | |
1101 | } | |
1102 | ||
1103 | static void spacc_ablk_cra_exit(struct crypto_tfm *tfm) | |
1104 | { | |
1105 | struct spacc_ablk_ctx *ctx = crypto_tfm_ctx(tfm); | |
1106 | ||
1107 | if (ctx->sw_cipher) | |
1108 | crypto_free_ablkcipher(ctx->sw_cipher); | |
1109 | ctx->sw_cipher = NULL; | |
1110 | } | |
1111 | ||
1112 | static int spacc_ablk_encrypt(struct ablkcipher_request *req) | |
1113 | { | |
1114 | struct crypto_ablkcipher *cipher = crypto_ablkcipher_reqtfm(req); | |
1115 | struct crypto_tfm *tfm = crypto_ablkcipher_tfm(cipher); | |
1116 | struct spacc_alg *alg = to_spacc_alg(tfm->__crt_alg); | |
1117 | ||
1118 | return spacc_ablk_setup(req, alg->type, 1); | |
1119 | } | |
1120 | ||
1121 | static int spacc_ablk_decrypt(struct ablkcipher_request *req) | |
1122 | { | |
1123 | struct crypto_ablkcipher *cipher = crypto_ablkcipher_reqtfm(req); | |
1124 | struct crypto_tfm *tfm = crypto_ablkcipher_tfm(cipher); | |
1125 | struct spacc_alg *alg = to_spacc_alg(tfm->__crt_alg); | |
1126 | ||
1127 | return spacc_ablk_setup(req, alg->type, 0); | |
1128 | } | |
1129 | ||
1130 | static inline int spacc_fifo_stat_empty(struct spacc_engine *engine) | |
1131 | { | |
1132 | return readl(engine->regs + SPA_FIFO_STAT_REG_OFFSET) & | |
1133 | SPA_FIFO_STAT_EMPTY; | |
1134 | } | |
1135 | ||
1136 | static void spacc_process_done(struct spacc_engine *engine) | |
1137 | { | |
1138 | struct spacc_req *req; | |
1139 | unsigned long flags; | |
1140 | ||
1141 | spin_lock_irqsave(&engine->hw_lock, flags); | |
1142 | ||
1143 | while (!spacc_fifo_stat_empty(engine)) { | |
1144 | req = list_first_entry(&engine->in_progress, struct spacc_req, | |
1145 | list); | |
1146 | list_move_tail(&req->list, &engine->completed); | |
40bfc14f | 1147 | --engine->in_flight; |
ce921368 JI |
1148 | |
1149 | /* POP the status register. */ | |
1150 | writel(~0, engine->regs + SPA_STAT_POP_REG_OFFSET); | |
1151 | req->result = (readl(engine->regs + SPA_STATUS_REG_OFFSET) & | |
1152 | SPA_STATUS_RES_CODE_MASK) >> SPA_STATUS_RES_CODE_OFFSET; | |
1153 | ||
1154 | /* | |
1155 | * Convert the SPAcc error status into the standard POSIX error | |
1156 | * codes. | |
1157 | */ | |
1158 | if (unlikely(req->result)) { | |
1159 | switch (req->result) { | |
1160 | case SPA_STATUS_ICV_FAIL: | |
1161 | req->result = -EBADMSG; | |
1162 | break; | |
1163 | ||
1164 | case SPA_STATUS_MEMORY_ERROR: | |
1165 | dev_warn(engine->dev, | |
1166 | "memory error triggered\n"); | |
1167 | req->result = -EFAULT; | |
1168 | break; | |
1169 | ||
1170 | case SPA_STATUS_BLOCK_ERROR: | |
1171 | dev_warn(engine->dev, | |
1172 | "block error triggered\n"); | |
1173 | req->result = -EIO; | |
1174 | break; | |
1175 | } | |
1176 | } | |
1177 | } | |
1178 | ||
1179 | tasklet_schedule(&engine->complete); | |
1180 | ||
1181 | spin_unlock_irqrestore(&engine->hw_lock, flags); | |
1182 | } | |
1183 | ||
1184 | static irqreturn_t spacc_spacc_irq(int irq, void *dev) | |
1185 | { | |
1186 | struct spacc_engine *engine = (struct spacc_engine *)dev; | |
1187 | u32 spacc_irq_stat = readl(engine->regs + SPA_IRQ_STAT_REG_OFFSET); | |
1188 | ||
1189 | writel(spacc_irq_stat, engine->regs + SPA_IRQ_STAT_REG_OFFSET); | |
1190 | spacc_process_done(engine); | |
1191 | ||
1192 | return IRQ_HANDLED; | |
1193 | } | |
1194 | ||
1195 | static void spacc_packet_timeout(unsigned long data) | |
1196 | { | |
1197 | struct spacc_engine *engine = (struct spacc_engine *)data; | |
1198 | ||
1199 | spacc_process_done(engine); | |
1200 | } | |
1201 | ||
1202 | static int spacc_req_submit(struct spacc_req *req) | |
1203 | { | |
1204 | struct crypto_alg *alg = req->req->tfm->__crt_alg; | |
1205 | ||
1206 | if (CRYPTO_ALG_TYPE_AEAD == (CRYPTO_ALG_TYPE_MASK & alg->cra_flags)) | |
1207 | return spacc_aead_submit(req); | |
1208 | else | |
1209 | return spacc_ablk_submit(req); | |
1210 | } | |
1211 | ||
1212 | static void spacc_spacc_complete(unsigned long data) | |
1213 | { | |
1214 | struct spacc_engine *engine = (struct spacc_engine *)data; | |
1215 | struct spacc_req *req, *tmp; | |
1216 | unsigned long flags; | |
ce921368 JI |
1217 | LIST_HEAD(completed); |
1218 | ||
1219 | spin_lock_irqsave(&engine->hw_lock, flags); | |
40bfc14f | 1220 | |
ce921368 | 1221 | list_splice_init(&engine->completed, &completed); |
40bfc14f JI |
1222 | spacc_push(engine); |
1223 | if (engine->in_flight) | |
1224 | mod_timer(&engine->packet_timeout, jiffies + PACKET_TIMEOUT); | |
1225 | ||
ce921368 JI |
1226 | spin_unlock_irqrestore(&engine->hw_lock, flags); |
1227 | ||
1228 | list_for_each_entry_safe(req, tmp, &completed, list) { | |
40bfc14f | 1229 | list_del(&req->list); |
b64dc04b | 1230 | req->complete(req); |
ce921368 | 1231 | } |
ce921368 JI |
1232 | } |
1233 | ||
1234 | #ifdef CONFIG_PM | |
1235 | static int spacc_suspend(struct device *dev) | |
1236 | { | |
1237 | struct platform_device *pdev = to_platform_device(dev); | |
1238 | struct spacc_engine *engine = platform_get_drvdata(pdev); | |
1239 | ||
1240 | /* | |
1241 | * We only support standby mode. All we have to do is gate the clock to | |
1242 | * the spacc. The hardware will preserve state until we turn it back | |
1243 | * on again. | |
1244 | */ | |
1245 | clk_disable(engine->clk); | |
1246 | ||
1247 | return 0; | |
1248 | } | |
1249 | ||
1250 | static int spacc_resume(struct device *dev) | |
1251 | { | |
1252 | struct platform_device *pdev = to_platform_device(dev); | |
1253 | struct spacc_engine *engine = platform_get_drvdata(pdev); | |
1254 | ||
1255 | return clk_enable(engine->clk); | |
1256 | } | |
1257 | ||
1258 | static const struct dev_pm_ops spacc_pm_ops = { | |
1259 | .suspend = spacc_suspend, | |
1260 | .resume = spacc_resume, | |
1261 | }; | |
1262 | #endif /* CONFIG_PM */ | |
1263 | ||
1264 | static inline struct spacc_engine *spacc_dev_to_engine(struct device *dev) | |
1265 | { | |
1266 | return dev ? platform_get_drvdata(to_platform_device(dev)) : NULL; | |
1267 | } | |
1268 | ||
1269 | static ssize_t spacc_stat_irq_thresh_show(struct device *dev, | |
1270 | struct device_attribute *attr, | |
1271 | char *buf) | |
1272 | { | |
1273 | struct spacc_engine *engine = spacc_dev_to_engine(dev); | |
1274 | ||
1275 | return snprintf(buf, PAGE_SIZE, "%u\n", engine->stat_irq_thresh); | |
1276 | } | |
1277 | ||
1278 | static ssize_t spacc_stat_irq_thresh_store(struct device *dev, | |
1279 | struct device_attribute *attr, | |
1280 | const char *buf, size_t len) | |
1281 | { | |
1282 | struct spacc_engine *engine = spacc_dev_to_engine(dev); | |
1283 | unsigned long thresh; | |
1284 | ||
61e2d1a9 | 1285 | if (kstrtoul(buf, 0, &thresh)) |
ce921368 JI |
1286 | return -EINVAL; |
1287 | ||
1288 | thresh = clamp(thresh, 1UL, engine->fifo_sz - 1); | |
1289 | ||
1290 | engine->stat_irq_thresh = thresh; | |
1291 | writel(engine->stat_irq_thresh << SPA_IRQ_CTRL_STAT_CNT_OFFSET, | |
1292 | engine->regs + SPA_IRQ_CTRL_REG_OFFSET); | |
1293 | ||
1294 | return len; | |
1295 | } | |
1296 | static DEVICE_ATTR(stat_irq_thresh, 0644, spacc_stat_irq_thresh_show, | |
1297 | spacc_stat_irq_thresh_store); | |
1298 | ||
1299 | static struct spacc_alg ipsec_engine_algs[] = { | |
1300 | { | |
1301 | .ctrl_default = SPA_CTRL_CIPH_ALG_AES | SPA_CTRL_CIPH_MODE_CBC, | |
1302 | .key_offs = 0, | |
1303 | .iv_offs = AES_MAX_KEY_SIZE, | |
1304 | .alg = { | |
1305 | .cra_name = "cbc(aes)", | |
1306 | .cra_driver_name = "cbc-aes-picoxcell", | |
1307 | .cra_priority = SPACC_CRYPTO_ALG_PRIORITY, | |
1308 | .cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER | | |
d912bb76 | 1309 | CRYPTO_ALG_KERN_DRIVER_ONLY | |
ce921368 JI |
1310 | CRYPTO_ALG_ASYNC | |
1311 | CRYPTO_ALG_NEED_FALLBACK, | |
1312 | .cra_blocksize = AES_BLOCK_SIZE, | |
1313 | .cra_ctxsize = sizeof(struct spacc_ablk_ctx), | |
1314 | .cra_type = &crypto_ablkcipher_type, | |
1315 | .cra_module = THIS_MODULE, | |
1316 | .cra_ablkcipher = { | |
1317 | .setkey = spacc_aes_setkey, | |
1318 | .encrypt = spacc_ablk_encrypt, | |
1319 | .decrypt = spacc_ablk_decrypt, | |
1320 | .min_keysize = AES_MIN_KEY_SIZE, | |
1321 | .max_keysize = AES_MAX_KEY_SIZE, | |
1322 | .ivsize = AES_BLOCK_SIZE, | |
1323 | }, | |
1324 | .cra_init = spacc_ablk_cra_init, | |
1325 | .cra_exit = spacc_ablk_cra_exit, | |
1326 | }, | |
1327 | }, | |
1328 | { | |
1329 | .key_offs = 0, | |
1330 | .iv_offs = AES_MAX_KEY_SIZE, | |
1331 | .ctrl_default = SPA_CTRL_CIPH_ALG_AES | SPA_CTRL_CIPH_MODE_ECB, | |
1332 | .alg = { | |
1333 | .cra_name = "ecb(aes)", | |
1334 | .cra_driver_name = "ecb-aes-picoxcell", | |
1335 | .cra_priority = SPACC_CRYPTO_ALG_PRIORITY, | |
1336 | .cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER | | |
d912bb76 | 1337 | CRYPTO_ALG_KERN_DRIVER_ONLY | |
ce921368 JI |
1338 | CRYPTO_ALG_ASYNC | CRYPTO_ALG_NEED_FALLBACK, |
1339 | .cra_blocksize = AES_BLOCK_SIZE, | |
1340 | .cra_ctxsize = sizeof(struct spacc_ablk_ctx), | |
1341 | .cra_type = &crypto_ablkcipher_type, | |
1342 | .cra_module = THIS_MODULE, | |
1343 | .cra_ablkcipher = { | |
1344 | .setkey = spacc_aes_setkey, | |
1345 | .encrypt = spacc_ablk_encrypt, | |
1346 | .decrypt = spacc_ablk_decrypt, | |
1347 | .min_keysize = AES_MIN_KEY_SIZE, | |
1348 | .max_keysize = AES_MAX_KEY_SIZE, | |
1349 | }, | |
1350 | .cra_init = spacc_ablk_cra_init, | |
1351 | .cra_exit = spacc_ablk_cra_exit, | |
1352 | }, | |
1353 | }, | |
1354 | { | |
1355 | .key_offs = DES_BLOCK_SIZE, | |
1356 | .iv_offs = 0, | |
1357 | .ctrl_default = SPA_CTRL_CIPH_ALG_DES | SPA_CTRL_CIPH_MODE_CBC, | |
1358 | .alg = { | |
1359 | .cra_name = "cbc(des)", | |
1360 | .cra_driver_name = "cbc-des-picoxcell", | |
1361 | .cra_priority = SPACC_CRYPTO_ALG_PRIORITY, | |
d912bb76 NM |
1362 | .cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER | |
1363 | CRYPTO_ALG_ASYNC | | |
1364 | CRYPTO_ALG_KERN_DRIVER_ONLY, | |
ce921368 JI |
1365 | .cra_blocksize = DES_BLOCK_SIZE, |
1366 | .cra_ctxsize = sizeof(struct spacc_ablk_ctx), | |
1367 | .cra_type = &crypto_ablkcipher_type, | |
1368 | .cra_module = THIS_MODULE, | |
1369 | .cra_ablkcipher = { | |
1370 | .setkey = spacc_des_setkey, | |
1371 | .encrypt = spacc_ablk_encrypt, | |
1372 | .decrypt = spacc_ablk_decrypt, | |
1373 | .min_keysize = DES_KEY_SIZE, | |
1374 | .max_keysize = DES_KEY_SIZE, | |
1375 | .ivsize = DES_BLOCK_SIZE, | |
1376 | }, | |
1377 | .cra_init = spacc_ablk_cra_init, | |
1378 | .cra_exit = spacc_ablk_cra_exit, | |
1379 | }, | |
1380 | }, | |
1381 | { | |
1382 | .key_offs = DES_BLOCK_SIZE, | |
1383 | .iv_offs = 0, | |
1384 | .ctrl_default = SPA_CTRL_CIPH_ALG_DES | SPA_CTRL_CIPH_MODE_ECB, | |
1385 | .alg = { | |
1386 | .cra_name = "ecb(des)", | |
1387 | .cra_driver_name = "ecb-des-picoxcell", | |
1388 | .cra_priority = SPACC_CRYPTO_ALG_PRIORITY, | |
d912bb76 NM |
1389 | .cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER | |
1390 | CRYPTO_ALG_ASYNC | | |
1391 | CRYPTO_ALG_KERN_DRIVER_ONLY, | |
ce921368 JI |
1392 | .cra_blocksize = DES_BLOCK_SIZE, |
1393 | .cra_ctxsize = sizeof(struct spacc_ablk_ctx), | |
1394 | .cra_type = &crypto_ablkcipher_type, | |
1395 | .cra_module = THIS_MODULE, | |
1396 | .cra_ablkcipher = { | |
1397 | .setkey = spacc_des_setkey, | |
1398 | .encrypt = spacc_ablk_encrypt, | |
1399 | .decrypt = spacc_ablk_decrypt, | |
1400 | .min_keysize = DES_KEY_SIZE, | |
1401 | .max_keysize = DES_KEY_SIZE, | |
1402 | }, | |
1403 | .cra_init = spacc_ablk_cra_init, | |
1404 | .cra_exit = spacc_ablk_cra_exit, | |
1405 | }, | |
1406 | }, | |
1407 | { | |
1408 | .key_offs = DES_BLOCK_SIZE, | |
1409 | .iv_offs = 0, | |
1410 | .ctrl_default = SPA_CTRL_CIPH_ALG_DES | SPA_CTRL_CIPH_MODE_CBC, | |
1411 | .alg = { | |
1412 | .cra_name = "cbc(des3_ede)", | |
1413 | .cra_driver_name = "cbc-des3-ede-picoxcell", | |
1414 | .cra_priority = SPACC_CRYPTO_ALG_PRIORITY, | |
d912bb76 NM |
1415 | .cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER | |
1416 | CRYPTO_ALG_ASYNC | | |
1417 | CRYPTO_ALG_KERN_DRIVER_ONLY, | |
ce921368 JI |
1418 | .cra_blocksize = DES3_EDE_BLOCK_SIZE, |
1419 | .cra_ctxsize = sizeof(struct spacc_ablk_ctx), | |
1420 | .cra_type = &crypto_ablkcipher_type, | |
1421 | .cra_module = THIS_MODULE, | |
1422 | .cra_ablkcipher = { | |
1423 | .setkey = spacc_des_setkey, | |
1424 | .encrypt = spacc_ablk_encrypt, | |
1425 | .decrypt = spacc_ablk_decrypt, | |
1426 | .min_keysize = DES3_EDE_KEY_SIZE, | |
1427 | .max_keysize = DES3_EDE_KEY_SIZE, | |
1428 | .ivsize = DES3_EDE_BLOCK_SIZE, | |
1429 | }, | |
1430 | .cra_init = spacc_ablk_cra_init, | |
1431 | .cra_exit = spacc_ablk_cra_exit, | |
1432 | }, | |
1433 | }, | |
1434 | { | |
1435 | .key_offs = DES_BLOCK_SIZE, | |
1436 | .iv_offs = 0, | |
1437 | .ctrl_default = SPA_CTRL_CIPH_ALG_DES | SPA_CTRL_CIPH_MODE_ECB, | |
1438 | .alg = { | |
1439 | .cra_name = "ecb(des3_ede)", | |
1440 | .cra_driver_name = "ecb-des3-ede-picoxcell", | |
1441 | .cra_priority = SPACC_CRYPTO_ALG_PRIORITY, | |
d912bb76 NM |
1442 | .cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER | |
1443 | CRYPTO_ALG_ASYNC | | |
1444 | CRYPTO_ALG_KERN_DRIVER_ONLY, | |
ce921368 JI |
1445 | .cra_blocksize = DES3_EDE_BLOCK_SIZE, |
1446 | .cra_ctxsize = sizeof(struct spacc_ablk_ctx), | |
1447 | .cra_type = &crypto_ablkcipher_type, | |
1448 | .cra_module = THIS_MODULE, | |
1449 | .cra_ablkcipher = { | |
1450 | .setkey = spacc_des_setkey, | |
1451 | .encrypt = spacc_ablk_encrypt, | |
1452 | .decrypt = spacc_ablk_decrypt, | |
1453 | .min_keysize = DES3_EDE_KEY_SIZE, | |
1454 | .max_keysize = DES3_EDE_KEY_SIZE, | |
1455 | }, | |
1456 | .cra_init = spacc_ablk_cra_init, | |
1457 | .cra_exit = spacc_ablk_cra_exit, | |
1458 | }, | |
1459 | }, | |
1460 | { | |
1461 | .ctrl_default = SPA_CTRL_CIPH_ALG_AES | SPA_CTRL_CIPH_MODE_CBC | | |
1462 | SPA_CTRL_HASH_ALG_SHA | SPA_CTRL_HASH_MODE_HMAC, | |
1463 | .key_offs = 0, | |
1464 | .iv_offs = AES_MAX_KEY_SIZE, | |
1465 | .alg = { | |
1466 | .cra_name = "authenc(hmac(sha1),cbc(aes))", | |
1467 | .cra_driver_name = "authenc-hmac-sha1-cbc-aes-picoxcell", | |
1468 | .cra_priority = SPACC_CRYPTO_ALG_PRIORITY, | |
d912bb76 NM |
1469 | .cra_flags = CRYPTO_ALG_TYPE_AEAD | |
1470 | CRYPTO_ALG_ASYNC | | |
1471 | CRYPTO_ALG_KERN_DRIVER_ONLY, | |
ce921368 JI |
1472 | .cra_blocksize = AES_BLOCK_SIZE, |
1473 | .cra_ctxsize = sizeof(struct spacc_aead_ctx), | |
1474 | .cra_type = &crypto_aead_type, | |
1475 | .cra_module = THIS_MODULE, | |
1476 | .cra_aead = { | |
1477 | .setkey = spacc_aead_setkey, | |
1478 | .setauthsize = spacc_aead_setauthsize, | |
1479 | .encrypt = spacc_aead_encrypt, | |
1480 | .decrypt = spacc_aead_decrypt, | |
1481 | .givencrypt = spacc_aead_givencrypt, | |
1482 | .ivsize = AES_BLOCK_SIZE, | |
1483 | .maxauthsize = SHA1_DIGEST_SIZE, | |
1484 | }, | |
1485 | .cra_init = spacc_aead_cra_init, | |
1486 | .cra_exit = spacc_aead_cra_exit, | |
1487 | }, | |
1488 | }, | |
1489 | { | |
1490 | .ctrl_default = SPA_CTRL_CIPH_ALG_AES | SPA_CTRL_CIPH_MODE_CBC | | |
1491 | SPA_CTRL_HASH_ALG_SHA256 | | |
1492 | SPA_CTRL_HASH_MODE_HMAC, | |
1493 | .key_offs = 0, | |
1494 | .iv_offs = AES_MAX_KEY_SIZE, | |
1495 | .alg = { | |
1496 | .cra_name = "authenc(hmac(sha256),cbc(aes))", | |
1497 | .cra_driver_name = "authenc-hmac-sha256-cbc-aes-picoxcell", | |
1498 | .cra_priority = SPACC_CRYPTO_ALG_PRIORITY, | |
d912bb76 NM |
1499 | .cra_flags = CRYPTO_ALG_TYPE_AEAD | |
1500 | CRYPTO_ALG_ASYNC | | |
1501 | CRYPTO_ALG_KERN_DRIVER_ONLY, | |
ce921368 JI |
1502 | .cra_blocksize = AES_BLOCK_SIZE, |
1503 | .cra_ctxsize = sizeof(struct spacc_aead_ctx), | |
1504 | .cra_type = &crypto_aead_type, | |
1505 | .cra_module = THIS_MODULE, | |
1506 | .cra_aead = { | |
1507 | .setkey = spacc_aead_setkey, | |
1508 | .setauthsize = spacc_aead_setauthsize, | |
1509 | .encrypt = spacc_aead_encrypt, | |
1510 | .decrypt = spacc_aead_decrypt, | |
1511 | .givencrypt = spacc_aead_givencrypt, | |
1512 | .ivsize = AES_BLOCK_SIZE, | |
1513 | .maxauthsize = SHA256_DIGEST_SIZE, | |
1514 | }, | |
1515 | .cra_init = spacc_aead_cra_init, | |
1516 | .cra_exit = spacc_aead_cra_exit, | |
1517 | }, | |
1518 | }, | |
1519 | { | |
1520 | .key_offs = 0, | |
1521 | .iv_offs = AES_MAX_KEY_SIZE, | |
1522 | .ctrl_default = SPA_CTRL_CIPH_ALG_AES | SPA_CTRL_CIPH_MODE_CBC | | |
1523 | SPA_CTRL_HASH_ALG_MD5 | SPA_CTRL_HASH_MODE_HMAC, | |
1524 | .alg = { | |
1525 | .cra_name = "authenc(hmac(md5),cbc(aes))", | |
1526 | .cra_driver_name = "authenc-hmac-md5-cbc-aes-picoxcell", | |
1527 | .cra_priority = SPACC_CRYPTO_ALG_PRIORITY, | |
d912bb76 NM |
1528 | .cra_flags = CRYPTO_ALG_TYPE_AEAD | |
1529 | CRYPTO_ALG_ASYNC | | |
1530 | CRYPTO_ALG_KERN_DRIVER_ONLY, | |
ce921368 JI |
1531 | .cra_blocksize = AES_BLOCK_SIZE, |
1532 | .cra_ctxsize = sizeof(struct spacc_aead_ctx), | |
1533 | .cra_type = &crypto_aead_type, | |
1534 | .cra_module = THIS_MODULE, | |
1535 | .cra_aead = { | |
1536 | .setkey = spacc_aead_setkey, | |
1537 | .setauthsize = spacc_aead_setauthsize, | |
1538 | .encrypt = spacc_aead_encrypt, | |
1539 | .decrypt = spacc_aead_decrypt, | |
1540 | .givencrypt = spacc_aead_givencrypt, | |
1541 | .ivsize = AES_BLOCK_SIZE, | |
1542 | .maxauthsize = MD5_DIGEST_SIZE, | |
1543 | }, | |
1544 | .cra_init = spacc_aead_cra_init, | |
1545 | .cra_exit = spacc_aead_cra_exit, | |
1546 | }, | |
1547 | }, | |
1548 | { | |
1549 | .key_offs = DES_BLOCK_SIZE, | |
1550 | .iv_offs = 0, | |
1551 | .ctrl_default = SPA_CTRL_CIPH_ALG_DES | SPA_CTRL_CIPH_MODE_CBC | | |
1552 | SPA_CTRL_HASH_ALG_SHA | SPA_CTRL_HASH_MODE_HMAC, | |
1553 | .alg = { | |
1554 | .cra_name = "authenc(hmac(sha1),cbc(des3_ede))", | |
1555 | .cra_driver_name = "authenc-hmac-sha1-cbc-3des-picoxcell", | |
1556 | .cra_priority = SPACC_CRYPTO_ALG_PRIORITY, | |
d912bb76 NM |
1557 | .cra_flags = CRYPTO_ALG_TYPE_AEAD | |
1558 | CRYPTO_ALG_ASYNC | | |
1559 | CRYPTO_ALG_KERN_DRIVER_ONLY, | |
ce921368 JI |
1560 | .cra_blocksize = DES3_EDE_BLOCK_SIZE, |
1561 | .cra_ctxsize = sizeof(struct spacc_aead_ctx), | |
1562 | .cra_type = &crypto_aead_type, | |
1563 | .cra_module = THIS_MODULE, | |
1564 | .cra_aead = { | |
1565 | .setkey = spacc_aead_setkey, | |
1566 | .setauthsize = spacc_aead_setauthsize, | |
1567 | .encrypt = spacc_aead_encrypt, | |
1568 | .decrypt = spacc_aead_decrypt, | |
1569 | .givencrypt = spacc_aead_givencrypt, | |
1570 | .ivsize = DES3_EDE_BLOCK_SIZE, | |
1571 | .maxauthsize = SHA1_DIGEST_SIZE, | |
1572 | }, | |
1573 | .cra_init = spacc_aead_cra_init, | |
1574 | .cra_exit = spacc_aead_cra_exit, | |
1575 | }, | |
1576 | }, | |
1577 | { | |
1578 | .key_offs = DES_BLOCK_SIZE, | |
1579 | .iv_offs = 0, | |
1580 | .ctrl_default = SPA_CTRL_CIPH_ALG_AES | SPA_CTRL_CIPH_MODE_CBC | | |
1581 | SPA_CTRL_HASH_ALG_SHA256 | | |
1582 | SPA_CTRL_HASH_MODE_HMAC, | |
1583 | .alg = { | |
1584 | .cra_name = "authenc(hmac(sha256),cbc(des3_ede))", | |
1585 | .cra_driver_name = "authenc-hmac-sha256-cbc-3des-picoxcell", | |
1586 | .cra_priority = SPACC_CRYPTO_ALG_PRIORITY, | |
d912bb76 NM |
1587 | .cra_flags = CRYPTO_ALG_TYPE_AEAD | |
1588 | CRYPTO_ALG_ASYNC | | |
1589 | CRYPTO_ALG_KERN_DRIVER_ONLY, | |
ce921368 JI |
1590 | .cra_blocksize = DES3_EDE_BLOCK_SIZE, |
1591 | .cra_ctxsize = sizeof(struct spacc_aead_ctx), | |
1592 | .cra_type = &crypto_aead_type, | |
1593 | .cra_module = THIS_MODULE, | |
1594 | .cra_aead = { | |
1595 | .setkey = spacc_aead_setkey, | |
1596 | .setauthsize = spacc_aead_setauthsize, | |
1597 | .encrypt = spacc_aead_encrypt, | |
1598 | .decrypt = spacc_aead_decrypt, | |
1599 | .givencrypt = spacc_aead_givencrypt, | |
1600 | .ivsize = DES3_EDE_BLOCK_SIZE, | |
1601 | .maxauthsize = SHA256_DIGEST_SIZE, | |
1602 | }, | |
1603 | .cra_init = spacc_aead_cra_init, | |
1604 | .cra_exit = spacc_aead_cra_exit, | |
1605 | }, | |
1606 | }, | |
1607 | { | |
1608 | .key_offs = DES_BLOCK_SIZE, | |
1609 | .iv_offs = 0, | |
1610 | .ctrl_default = SPA_CTRL_CIPH_ALG_DES | SPA_CTRL_CIPH_MODE_CBC | | |
1611 | SPA_CTRL_HASH_ALG_MD5 | SPA_CTRL_HASH_MODE_HMAC, | |
1612 | .alg = { | |
1613 | .cra_name = "authenc(hmac(md5),cbc(des3_ede))", | |
1614 | .cra_driver_name = "authenc-hmac-md5-cbc-3des-picoxcell", | |
1615 | .cra_priority = SPACC_CRYPTO_ALG_PRIORITY, | |
d912bb76 NM |
1616 | .cra_flags = CRYPTO_ALG_TYPE_AEAD | |
1617 | CRYPTO_ALG_ASYNC | | |
1618 | CRYPTO_ALG_KERN_DRIVER_ONLY, | |
ce921368 JI |
1619 | .cra_blocksize = DES3_EDE_BLOCK_SIZE, |
1620 | .cra_ctxsize = sizeof(struct spacc_aead_ctx), | |
1621 | .cra_type = &crypto_aead_type, | |
1622 | .cra_module = THIS_MODULE, | |
1623 | .cra_aead = { | |
1624 | .setkey = spacc_aead_setkey, | |
1625 | .setauthsize = spacc_aead_setauthsize, | |
1626 | .encrypt = spacc_aead_encrypt, | |
1627 | .decrypt = spacc_aead_decrypt, | |
1628 | .givencrypt = spacc_aead_givencrypt, | |
1629 | .ivsize = DES3_EDE_BLOCK_SIZE, | |
1630 | .maxauthsize = MD5_DIGEST_SIZE, | |
1631 | }, | |
1632 | .cra_init = spacc_aead_cra_init, | |
1633 | .cra_exit = spacc_aead_cra_exit, | |
1634 | }, | |
1635 | }, | |
1636 | }; | |
1637 | ||
1638 | static struct spacc_alg l2_engine_algs[] = { | |
1639 | { | |
1640 | .key_offs = 0, | |
1641 | .iv_offs = SPACC_CRYPTO_KASUMI_F8_KEY_LEN, | |
1642 | .ctrl_default = SPA_CTRL_CIPH_ALG_KASUMI | | |
1643 | SPA_CTRL_CIPH_MODE_F8, | |
1644 | .alg = { | |
1645 | .cra_name = "f8(kasumi)", | |
1646 | .cra_driver_name = "f8-kasumi-picoxcell", | |
1647 | .cra_priority = SPACC_CRYPTO_ALG_PRIORITY, | |
d912bb76 NM |
1648 | .cra_flags = CRYPTO_ALG_TYPE_GIVCIPHER | |
1649 | CRYPTO_ALG_ASYNC | | |
1650 | CRYPTO_ALG_KERN_DRIVER_ONLY, | |
ce921368 JI |
1651 | .cra_blocksize = 8, |
1652 | .cra_ctxsize = sizeof(struct spacc_ablk_ctx), | |
1653 | .cra_type = &crypto_ablkcipher_type, | |
1654 | .cra_module = THIS_MODULE, | |
1655 | .cra_ablkcipher = { | |
1656 | .setkey = spacc_kasumi_f8_setkey, | |
1657 | .encrypt = spacc_ablk_encrypt, | |
1658 | .decrypt = spacc_ablk_decrypt, | |
1659 | .min_keysize = 16, | |
1660 | .max_keysize = 16, | |
1661 | .ivsize = 8, | |
1662 | }, | |
1663 | .cra_init = spacc_ablk_cra_init, | |
1664 | .cra_exit = spacc_ablk_cra_exit, | |
1665 | }, | |
1666 | }, | |
1667 | }; | |
1668 | ||
30343ef1 JI |
1669 | #ifdef CONFIG_OF |
1670 | static const struct of_device_id spacc_of_id_table[] = { | |
1671 | { .compatible = "picochip,spacc-ipsec" }, | |
1672 | { .compatible = "picochip,spacc-l2" }, | |
1673 | {} | |
1674 | }; | |
30343ef1 JI |
1675 | #endif /* CONFIG_OF */ |
1676 | ||
1677 | static bool spacc_is_compatible(struct platform_device *pdev, | |
1678 | const char *spacc_type) | |
1679 | { | |
1680 | const struct platform_device_id *platid = platform_get_device_id(pdev); | |
1681 | ||
1682 | if (platid && !strcmp(platid->name, spacc_type)) | |
1683 | return true; | |
1684 | ||
1685 | #ifdef CONFIG_OF | |
1686 | if (of_device_is_compatible(pdev->dev.of_node, spacc_type)) | |
1687 | return true; | |
1688 | #endif /* CONFIG_OF */ | |
1689 | ||
1690 | return false; | |
1691 | } | |
1692 | ||
49cfe4db | 1693 | static int spacc_probe(struct platform_device *pdev) |
ce921368 JI |
1694 | { |
1695 | int i, err, ret = -EINVAL; | |
1696 | struct resource *mem, *irq; | |
1697 | struct spacc_engine *engine = devm_kzalloc(&pdev->dev, sizeof(*engine), | |
1698 | GFP_KERNEL); | |
1699 | if (!engine) | |
1700 | return -ENOMEM; | |
1701 | ||
30343ef1 | 1702 | if (spacc_is_compatible(pdev, "picochip,spacc-ipsec")) { |
c3f4200f JI |
1703 | engine->max_ctxs = SPACC_CRYPTO_IPSEC_MAX_CTXS; |
1704 | engine->cipher_pg_sz = SPACC_CRYPTO_IPSEC_CIPHER_PG_SZ; | |
1705 | engine->hash_pg_sz = SPACC_CRYPTO_IPSEC_HASH_PG_SZ; | |
1706 | engine->fifo_sz = SPACC_CRYPTO_IPSEC_FIFO_SZ; | |
1707 | engine->algs = ipsec_engine_algs; | |
1708 | engine->num_algs = ARRAY_SIZE(ipsec_engine_algs); | |
30343ef1 | 1709 | } else if (spacc_is_compatible(pdev, "picochip,spacc-l2")) { |
c3f4200f JI |
1710 | engine->max_ctxs = SPACC_CRYPTO_L2_MAX_CTXS; |
1711 | engine->cipher_pg_sz = SPACC_CRYPTO_L2_CIPHER_PG_SZ; | |
1712 | engine->hash_pg_sz = SPACC_CRYPTO_L2_HASH_PG_SZ; | |
1713 | engine->fifo_sz = SPACC_CRYPTO_L2_FIFO_SZ; | |
1714 | engine->algs = l2_engine_algs; | |
1715 | engine->num_algs = ARRAY_SIZE(l2_engine_algs); | |
1716 | } else { | |
1717 | return -EINVAL; | |
1718 | } | |
1719 | ||
1720 | engine->name = dev_name(&pdev->dev); | |
ce921368 JI |
1721 | |
1722 | mem = platform_get_resource(pdev, IORESOURCE_MEM, 0); | |
1723 | irq = platform_get_resource(pdev, IORESOURCE_IRQ, 0); | |
1724 | if (!mem || !irq) { | |
1725 | dev_err(&pdev->dev, "no memory/irq resource for engine\n"); | |
1726 | return -ENXIO; | |
1727 | } | |
1728 | ||
1729 | if (!devm_request_mem_region(&pdev->dev, mem->start, resource_size(mem), | |
1730 | engine->name)) | |
1731 | return -ENOMEM; | |
1732 | ||
1733 | engine->regs = devm_ioremap(&pdev->dev, mem->start, resource_size(mem)); | |
1734 | if (!engine->regs) { | |
1735 | dev_err(&pdev->dev, "memory map failed\n"); | |
1736 | return -ENOMEM; | |
1737 | } | |
1738 | ||
1739 | if (devm_request_irq(&pdev->dev, irq->start, spacc_spacc_irq, 0, | |
1740 | engine->name, engine)) { | |
1741 | dev_err(engine->dev, "failed to request IRQ\n"); | |
1742 | return -EBUSY; | |
1743 | } | |
1744 | ||
1745 | engine->dev = &pdev->dev; | |
1746 | engine->cipher_ctx_base = engine->regs + SPA_CIPH_KEY_BASE_REG_OFFSET; | |
1747 | engine->hash_key_base = engine->regs + SPA_HASH_KEY_BASE_REG_OFFSET; | |
1748 | ||
1749 | engine->req_pool = dmam_pool_create(engine->name, engine->dev, | |
1750 | MAX_DDT_LEN * sizeof(struct spacc_ddt), 8, SZ_64K); | |
1751 | if (!engine->req_pool) | |
1752 | return -ENOMEM; | |
1753 | ||
1754 | spin_lock_init(&engine->hw_lock); | |
1755 | ||
4efae8c9 | 1756 | engine->clk = clk_get(&pdev->dev, "ref"); |
ce921368 JI |
1757 | if (IS_ERR(engine->clk)) { |
1758 | dev_info(&pdev->dev, "clk unavailable\n"); | |
1759 | device_remove_file(&pdev->dev, &dev_attr_stat_irq_thresh); | |
1760 | return PTR_ERR(engine->clk); | |
1761 | } | |
1762 | ||
1763 | if (clk_enable(engine->clk)) { | |
1764 | dev_info(&pdev->dev, "unable to enable clk\n"); | |
1765 | clk_put(engine->clk); | |
1766 | return -EIO; | |
1767 | } | |
1768 | ||
1769 | err = device_create_file(&pdev->dev, &dev_attr_stat_irq_thresh); | |
1770 | if (err) { | |
1771 | clk_disable(engine->clk); | |
1772 | clk_put(engine->clk); | |
1773 | return err; | |
1774 | } | |
1775 | ||
1776 | ||
1777 | /* | |
1778 | * Use an IRQ threshold of 50% as a default. This seems to be a | |
1779 | * reasonable trade off of latency against throughput but can be | |
1780 | * changed at runtime. | |
1781 | */ | |
1782 | engine->stat_irq_thresh = (engine->fifo_sz / 2); | |
1783 | ||
1784 | /* | |
1785 | * Configure the interrupts. We only use the STAT_CNT interrupt as we | |
1786 | * only submit a new packet for processing when we complete another in | |
1787 | * the queue. This minimizes time spent in the interrupt handler. | |
1788 | */ | |
1789 | writel(engine->stat_irq_thresh << SPA_IRQ_CTRL_STAT_CNT_OFFSET, | |
1790 | engine->regs + SPA_IRQ_CTRL_REG_OFFSET); | |
1791 | writel(SPA_IRQ_EN_STAT_EN | SPA_IRQ_EN_GLBL_EN, | |
1792 | engine->regs + SPA_IRQ_EN_REG_OFFSET); | |
1793 | ||
1794 | setup_timer(&engine->packet_timeout, spacc_packet_timeout, | |
1795 | (unsigned long)engine); | |
1796 | ||
1797 | INIT_LIST_HEAD(&engine->pending); | |
1798 | INIT_LIST_HEAD(&engine->completed); | |
1799 | INIT_LIST_HEAD(&engine->in_progress); | |
1800 | engine->in_flight = 0; | |
1801 | tasklet_init(&engine->complete, spacc_spacc_complete, | |
1802 | (unsigned long)engine); | |
1803 | ||
1804 | platform_set_drvdata(pdev, engine); | |
1805 | ||
1806 | INIT_LIST_HEAD(&engine->registered_algs); | |
1807 | for (i = 0; i < engine->num_algs; ++i) { | |
1808 | engine->algs[i].engine = engine; | |
1809 | err = crypto_register_alg(&engine->algs[i].alg); | |
1810 | if (!err) { | |
1811 | list_add_tail(&engine->algs[i].entry, | |
1812 | &engine->registered_algs); | |
1813 | ret = 0; | |
1814 | } | |
1815 | if (err) | |
1816 | dev_err(engine->dev, "failed to register alg \"%s\"\n", | |
1817 | engine->algs[i].alg.cra_name); | |
1818 | else | |
1819 | dev_dbg(engine->dev, "registered alg \"%s\"\n", | |
1820 | engine->algs[i].alg.cra_name); | |
1821 | } | |
1822 | ||
1823 | return ret; | |
1824 | } | |
1825 | ||
49cfe4db | 1826 | static int spacc_remove(struct platform_device *pdev) |
ce921368 JI |
1827 | { |
1828 | struct spacc_alg *alg, *next; | |
1829 | struct spacc_engine *engine = platform_get_drvdata(pdev); | |
1830 | ||
1831 | del_timer_sync(&engine->packet_timeout); | |
1832 | device_remove_file(&pdev->dev, &dev_attr_stat_irq_thresh); | |
1833 | ||
1834 | list_for_each_entry_safe(alg, next, &engine->registered_algs, entry) { | |
1835 | list_del(&alg->entry); | |
1836 | crypto_unregister_alg(&alg->alg); | |
1837 | } | |
1838 | ||
1839 | clk_disable(engine->clk); | |
1840 | clk_put(engine->clk); | |
1841 | ||
1842 | return 0; | |
1843 | } | |
1844 | ||
c3f4200f JI |
1845 | static const struct platform_device_id spacc_id_table[] = { |
1846 | { "picochip,spacc-ipsec", }, | |
1847 | { "picochip,spacc-l2", }, | |
14198dd6 | 1848 | { } |
ce921368 JI |
1849 | }; |
1850 | ||
c3f4200f JI |
1851 | static struct platform_driver spacc_driver = { |
1852 | .probe = spacc_probe, | |
49cfe4db | 1853 | .remove = spacc_remove, |
ce921368 | 1854 | .driver = { |
c3f4200f | 1855 | .name = "picochip,spacc", |
ce921368 JI |
1856 | #ifdef CONFIG_PM |
1857 | .pm = &spacc_pm_ops, | |
1858 | #endif /* CONFIG_PM */ | |
5cec26e9 | 1859 | .of_match_table = of_match_ptr(spacc_of_id_table), |
ce921368 | 1860 | }, |
c3f4200f | 1861 | .id_table = spacc_id_table, |
ce921368 JI |
1862 | }; |
1863 | ||
741e8c2d | 1864 | module_platform_driver(spacc_driver); |
ce921368 JI |
1865 | |
1866 | MODULE_LICENSE("GPL"); | |
1867 | MODULE_AUTHOR("Jamie Iles"); |