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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/internal/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>
37#include <linux/of.h>
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/sizes.h>
44#include <linux/slab.h>
45#include <linux/timer.h>
46
47#include "picoxcell_crypto_regs.h"
48
49/*
50 * The threshold for the number of entries in the CMD FIFO available before
51 * the CMD0_CNT interrupt is raised. Increasing this value will reduce the
52 * number of interrupts raised to the CPU.
53 */
54#define CMD0_IRQ_THRESHOLD 1
55
56/*
57 * The timeout period (in jiffies) for a PDU. When the the number of PDUs in
58 * flight is greater than the STAT_IRQ_THRESHOLD or 0 the timer is disabled.
59 * When there are packets in flight but lower than the threshold, we enable
60 * the timer and at expiry, attempt to remove any processed packets from the
61 * queue and if there are still packets left, schedule the timer again.
62 */
63#define PACKET_TIMEOUT 1
64
65/* The priority to register each algorithm with. */
66#define SPACC_CRYPTO_ALG_PRIORITY 10000
67
68#define SPACC_CRYPTO_KASUMI_F8_KEY_LEN 16
69#define SPACC_CRYPTO_IPSEC_CIPHER_PG_SZ 64
70#define SPACC_CRYPTO_IPSEC_HASH_PG_SZ 64
71#define SPACC_CRYPTO_IPSEC_MAX_CTXS 32
72#define SPACC_CRYPTO_IPSEC_FIFO_SZ 32
73#define SPACC_CRYPTO_L2_CIPHER_PG_SZ 64
74#define SPACC_CRYPTO_L2_HASH_PG_SZ 64
75#define SPACC_CRYPTO_L2_MAX_CTXS 128
76#define SPACC_CRYPTO_L2_FIFO_SZ 128
77
78#define MAX_DDT_LEN 16
79
80/* DDT format. This must match the hardware DDT format exactly. */
81struct spacc_ddt {
82 dma_addr_t p;
83 u32 len;
84};
85
86/*
87 * Asynchronous crypto request structure.
88 *
89 * This structure defines a request that is either queued for processing or
90 * being processed.
91 */
92struct spacc_req {
93 struct list_head list;
94 struct spacc_engine *engine;
95 struct crypto_async_request *req;
96 int result;
97 bool is_encrypt;
98 unsigned ctx_id;
99 dma_addr_t src_addr, dst_addr;
100 struct spacc_ddt *src_ddt, *dst_ddt;
101 void (*complete)(struct spacc_req *req);
102};
103
104struct spacc_aead {
105 unsigned long ctrl_default;
106 unsigned long type;
107 struct aead_alg alg;
108 struct spacc_engine *engine;
109 struct list_head entry;
110 int key_offs;
111 int iv_offs;
112};
113
114struct spacc_engine {
115 void __iomem *regs;
116 struct list_head pending;
117 int next_ctx;
118 spinlock_t hw_lock;
119 int in_flight;
120 struct list_head completed;
121 struct list_head in_progress;
122 struct tasklet_struct complete;
123 unsigned long fifo_sz;
124 void __iomem *cipher_ctx_base;
125 void __iomem *hash_key_base;
126 struct spacc_alg *algs;
127 unsigned num_algs;
128 struct list_head registered_algs;
129 struct spacc_aead *aeads;
130 unsigned num_aeads;
131 struct list_head registered_aeads;
132 size_t cipher_pg_sz;
133 size_t hash_pg_sz;
134 const char *name;
135 struct clk *clk;
136 struct device *dev;
137 unsigned max_ctxs;
138 struct timer_list packet_timeout;
139 unsigned stat_irq_thresh;
140 struct dma_pool *req_pool;
141};
142
143/* Algorithm type mask. */
144#define SPACC_CRYPTO_ALG_MASK 0x7
145
146/* SPACC definition of a crypto algorithm. */
147struct spacc_alg {
148 unsigned long ctrl_default;
149 unsigned long type;
150 struct crypto_alg alg;
151 struct spacc_engine *engine;
152 struct list_head entry;
153 int key_offs;
154 int iv_offs;
155};
156
157/* Generic context structure for any algorithm type. */
158struct spacc_generic_ctx {
159 struct spacc_engine *engine;
160 int flags;
161 int key_offs;
162 int iv_offs;
163};
164
165/* Block cipher context. */
166struct spacc_ablk_ctx {
167 struct spacc_generic_ctx generic;
168 u8 key[AES_MAX_KEY_SIZE];
169 u8 key_len;
170 /*
171 * The fallback cipher. If the operation can't be done in hardware,
172 * fallback to a software version.
173 */
174 struct crypto_skcipher *sw_cipher;
175};
176
177/* AEAD cipher context. */
178struct spacc_aead_ctx {
179 struct spacc_generic_ctx generic;
180 u8 cipher_key[AES_MAX_KEY_SIZE];
181 u8 hash_ctx[SPACC_CRYPTO_IPSEC_HASH_PG_SZ];
182 u8 cipher_key_len;
183 u8 hash_key_len;
184 struct crypto_aead *sw_cipher;
185};
186
187static int spacc_ablk_submit(struct spacc_req *req);
188
189static inline struct spacc_alg *to_spacc_alg(struct crypto_alg *alg)
190{
191 return alg ? container_of(alg, struct spacc_alg, alg) : NULL;
192}
193
194static inline struct spacc_aead *to_spacc_aead(struct aead_alg *alg)
195{
196 return container_of(alg, struct spacc_aead, alg);
197}
198
199static inline int spacc_fifo_cmd_full(struct spacc_engine *engine)
200{
201 u32 fifo_stat = readl(engine->regs + SPA_FIFO_STAT_REG_OFFSET);
202
203 return fifo_stat & SPA_FIFO_CMD_FULL;
204}
205
206/*
207 * Given a cipher context, and a context number, get the base address of the
208 * context page.
209 *
210 * Returns the address of the context page where the key/context may
211 * be written.
212 */
213static inline void __iomem *spacc_ctx_page_addr(struct spacc_generic_ctx *ctx,
214 unsigned indx,
215 bool is_cipher_ctx)
216{
217 return is_cipher_ctx ? ctx->engine->cipher_ctx_base +
218 (indx * ctx->engine->cipher_pg_sz) :
219 ctx->engine->hash_key_base + (indx * ctx->engine->hash_pg_sz);
220}
221
222/* The context pages can only be written with 32-bit accesses. */
223static inline void memcpy_toio32(u32 __iomem *dst, const void *src,
224 unsigned count)
225{
226 const u32 *src32 = (const u32 *) src;
227
228 while (count--)
229 writel(*src32++, dst++);
230}
231
232static void spacc_cipher_write_ctx(struct spacc_generic_ctx *ctx,
233 void __iomem *page_addr, const u8 *key,
234 size_t key_len, const u8 *iv, size_t iv_len)
235{
236 void __iomem *key_ptr = page_addr + ctx->key_offs;
237 void __iomem *iv_ptr = page_addr + ctx->iv_offs;
238
239 memcpy_toio32(key_ptr, key, key_len / 4);
240 memcpy_toio32(iv_ptr, iv, iv_len / 4);
241}
242
243/*
244 * Load a context into the engines context memory.
245 *
246 * Returns the index of the context page where the context was loaded.
247 */
248static unsigned spacc_load_ctx(struct spacc_generic_ctx *ctx,
249 const u8 *ciph_key, size_t ciph_len,
250 const u8 *iv, size_t ivlen, const u8 *hash_key,
251 size_t hash_len)
252{
253 unsigned indx = ctx->engine->next_ctx++;
254 void __iomem *ciph_page_addr, *hash_page_addr;
255
256 ciph_page_addr = spacc_ctx_page_addr(ctx, indx, 1);
257 hash_page_addr = spacc_ctx_page_addr(ctx, indx, 0);
258
259 ctx->engine->next_ctx &= ctx->engine->fifo_sz - 1;
260 spacc_cipher_write_ctx(ctx, ciph_page_addr, ciph_key, ciph_len, iv,
261 ivlen);
262 writel(ciph_len | (indx << SPA_KEY_SZ_CTX_INDEX_OFFSET) |
263 (1 << SPA_KEY_SZ_CIPHER_OFFSET),
264 ctx->engine->regs + SPA_KEY_SZ_REG_OFFSET);
265
266 if (hash_key) {
267 memcpy_toio32(hash_page_addr, hash_key, hash_len / 4);
268 writel(hash_len | (indx << SPA_KEY_SZ_CTX_INDEX_OFFSET),
269 ctx->engine->regs + SPA_KEY_SZ_REG_OFFSET);
270 }
271
272 return indx;
273}
274
275static inline void ddt_set(struct spacc_ddt *ddt, dma_addr_t phys, size_t len)
276{
277 ddt->p = phys;
278 ddt->len = len;
279}
280
281/*
282 * Take a crypto request and scatterlists for the data and turn them into DDTs
283 * for passing to the crypto engines. This also DMA maps the data so that the
284 * crypto engines can DMA to/from them.
285 */
286static struct spacc_ddt *spacc_sg_to_ddt(struct spacc_engine *engine,
287 struct scatterlist *payload,
288 unsigned nbytes,
289 enum dma_data_direction dir,
290 dma_addr_t *ddt_phys)
291{
292 unsigned mapped_ents;
293 struct scatterlist *cur;
294 struct spacc_ddt *ddt;
295 int i;
296 int nents;
297
298 nents = sg_nents_for_len(payload, nbytes);
299 if (nents < 0) {
300 dev_err(engine->dev, "Invalid numbers of SG.\n");
301 return NULL;
302 }
303 mapped_ents = dma_map_sg(engine->dev, payload, nents, dir);
304
305 if (mapped_ents + 1 > MAX_DDT_LEN)
306 goto out;
307
308 ddt = dma_pool_alloc(engine->req_pool, GFP_ATOMIC, ddt_phys);
309 if (!ddt)
310 goto out;
311
312 for_each_sg(payload, cur, mapped_ents, i)
313 ddt_set(&ddt[i], sg_dma_address(cur), sg_dma_len(cur));
314 ddt_set(&ddt[mapped_ents], 0, 0);
315
316 return ddt;
317
318out:
319 dma_unmap_sg(engine->dev, payload, nents, dir);
320 return NULL;
321}
322
323static int spacc_aead_make_ddts(struct aead_request *areq)
324{
325 struct crypto_aead *aead = crypto_aead_reqtfm(areq);
326 struct spacc_req *req = aead_request_ctx(areq);
327 struct spacc_engine *engine = req->engine;
328 struct spacc_ddt *src_ddt, *dst_ddt;
329 unsigned total;
330 int src_nents, dst_nents;
331 struct scatterlist *cur;
332 int i, dst_ents, src_ents;
333
334 total = areq->assoclen + areq->cryptlen;
335 if (req->is_encrypt)
336 total += crypto_aead_authsize(aead);
337
338 src_nents = sg_nents_for_len(areq->src, total);
339 if (src_nents < 0) {
340 dev_err(engine->dev, "Invalid numbers of src SG.\n");
341 return src_nents;
342 }
343 if (src_nents + 1 > MAX_DDT_LEN)
344 return -E2BIG;
345
346 dst_nents = 0;
347 if (areq->src != areq->dst) {
348 dst_nents = sg_nents_for_len(areq->dst, total);
349 if (dst_nents < 0) {
350 dev_err(engine->dev, "Invalid numbers of dst SG.\n");
351 return dst_nents;
352 }
353 if (src_nents + 1 > MAX_DDT_LEN)
354 return -E2BIG;
355 }
356
357 src_ddt = dma_pool_alloc(engine->req_pool, GFP_ATOMIC, &req->src_addr);
358 if (!src_ddt)
359 goto err;
360
361 dst_ddt = dma_pool_alloc(engine->req_pool, GFP_ATOMIC, &req->dst_addr);
362 if (!dst_ddt)
363 goto err_free_src;
364
365 req->src_ddt = src_ddt;
366 req->dst_ddt = dst_ddt;
367
368 if (dst_nents) {
369 src_ents = dma_map_sg(engine->dev, areq->src, src_nents,
370 DMA_TO_DEVICE);
371 if (!src_ents)
372 goto err_free_dst;
373
374 dst_ents = dma_map_sg(engine->dev, areq->dst, dst_nents,
375 DMA_FROM_DEVICE);
376
377 if (!dst_ents) {
378 dma_unmap_sg(engine->dev, areq->src, src_nents,
379 DMA_TO_DEVICE);
380 goto err_free_dst;
381 }
382 } else {
383 src_ents = dma_map_sg(engine->dev, areq->src, src_nents,
384 DMA_BIDIRECTIONAL);
385 if (!src_ents)
386 goto err_free_dst;
387 dst_ents = src_ents;
388 }
389
390 /*
391 * Now map in the payload for the source and destination and terminate
392 * with the NULL pointers.
393 */
394 for_each_sg(areq->src, cur, src_ents, i)
395 ddt_set(src_ddt++, sg_dma_address(cur), sg_dma_len(cur));
396
397 /* For decryption we need to skip the associated data. */
398 total = req->is_encrypt ? 0 : areq->assoclen;
399 for_each_sg(areq->dst, cur, dst_ents, i) {
400 unsigned len = sg_dma_len(cur);
401
402 if (len <= total) {
403 total -= len;
404 continue;
405 }
406
407 ddt_set(dst_ddt++, sg_dma_address(cur) + total, len - total);
408 }
409
410 ddt_set(src_ddt, 0, 0);
411 ddt_set(dst_ddt, 0, 0);
412
413 return 0;
414
415err_free_dst:
416 dma_pool_free(engine->req_pool, dst_ddt, req->dst_addr);
417err_free_src:
418 dma_pool_free(engine->req_pool, src_ddt, req->src_addr);
419err:
420 return -ENOMEM;
421}
422
423static void spacc_aead_free_ddts(struct spacc_req *req)
424{
425 struct aead_request *areq = container_of(req->req, struct aead_request,
426 base);
427 struct crypto_aead *aead = crypto_aead_reqtfm(areq);
428 unsigned total = areq->assoclen + areq->cryptlen +
429 (req->is_encrypt ? crypto_aead_authsize(aead) : 0);
430 struct spacc_aead_ctx *aead_ctx = crypto_aead_ctx(aead);
431 struct spacc_engine *engine = aead_ctx->generic.engine;
432 int nents = sg_nents_for_len(areq->src, total);
433
434 /* sg_nents_for_len should not fail since it works when mapping sg */
435 if (unlikely(nents < 0)) {
436 dev_err(engine->dev, "Invalid numbers of src SG.\n");
437 return;
438 }
439
440 if (areq->src != areq->dst) {
441 dma_unmap_sg(engine->dev, areq->src, nents, DMA_TO_DEVICE);
442 nents = sg_nents_for_len(areq->dst, total);
443 if (unlikely(nents < 0)) {
444 dev_err(engine->dev, "Invalid numbers of dst SG.\n");
445 return;
446 }
447 dma_unmap_sg(engine->dev, areq->dst, nents, DMA_FROM_DEVICE);
448 } else
449 dma_unmap_sg(engine->dev, areq->src, nents, DMA_BIDIRECTIONAL);
450
451 dma_pool_free(engine->req_pool, req->src_ddt, req->src_addr);
452 dma_pool_free(engine->req_pool, req->dst_ddt, req->dst_addr);
453}
454
455static void spacc_free_ddt(struct spacc_req *req, struct spacc_ddt *ddt,
456 dma_addr_t ddt_addr, struct scatterlist *payload,
457 unsigned nbytes, enum dma_data_direction dir)
458{
459 int nents = sg_nents_for_len(payload, nbytes);
460
461 if (nents < 0) {
462 dev_err(req->engine->dev, "Invalid numbers of SG.\n");
463 return;
464 }
465
466 dma_unmap_sg(req->engine->dev, payload, nents, dir);
467 dma_pool_free(req->engine->req_pool, ddt, ddt_addr);
468}
469
470static int spacc_aead_setkey(struct crypto_aead *tfm, const u8 *key,
471 unsigned int keylen)
472{
473 struct spacc_aead_ctx *ctx = crypto_aead_ctx(tfm);
474 struct crypto_authenc_keys keys;
475 int err;
476
477 crypto_aead_clear_flags(ctx->sw_cipher, CRYPTO_TFM_REQ_MASK);
478 crypto_aead_set_flags(ctx->sw_cipher, crypto_aead_get_flags(tfm) &
479 CRYPTO_TFM_REQ_MASK);
480 err = crypto_aead_setkey(ctx->sw_cipher, key, keylen);
481 crypto_aead_clear_flags(tfm, CRYPTO_TFM_RES_MASK);
482 crypto_aead_set_flags(tfm, crypto_aead_get_flags(ctx->sw_cipher) &
483 CRYPTO_TFM_RES_MASK);
484 if (err)
485 return err;
486
487 if (crypto_authenc_extractkeys(&keys, key, keylen) != 0)
488 goto badkey;
489
490 if (keys.enckeylen > AES_MAX_KEY_SIZE)
491 goto badkey;
492
493 if (keys.authkeylen > sizeof(ctx->hash_ctx))
494 goto badkey;
495
496 memcpy(ctx->cipher_key, keys.enckey, keys.enckeylen);
497 ctx->cipher_key_len = keys.enckeylen;
498
499 memcpy(ctx->hash_ctx, keys.authkey, keys.authkeylen);
500 ctx->hash_key_len = keys.authkeylen;
501
502 memzero_explicit(&keys, sizeof(keys));
503 return 0;
504
505badkey:
506 crypto_aead_set_flags(tfm, CRYPTO_TFM_RES_BAD_KEY_LEN);
507 memzero_explicit(&keys, sizeof(keys));
508 return -EINVAL;
509}
510
511static int spacc_aead_setauthsize(struct crypto_aead *tfm,
512 unsigned int authsize)
513{
514 struct spacc_aead_ctx *ctx = crypto_tfm_ctx(crypto_aead_tfm(tfm));
515
516 return crypto_aead_setauthsize(ctx->sw_cipher, authsize);
517}
518
519/*
520 * Check if an AEAD request requires a fallback operation. Some requests can't
521 * be completed in hardware because the hardware may not support certain key
522 * sizes. In these cases we need to complete the request in software.
523 */
524static int spacc_aead_need_fallback(struct aead_request *aead_req)
525{
526 struct crypto_aead *aead = crypto_aead_reqtfm(aead_req);
527 struct aead_alg *alg = crypto_aead_alg(aead);
528 struct spacc_aead *spacc_alg = to_spacc_aead(alg);
529 struct spacc_aead_ctx *ctx = crypto_aead_ctx(aead);
530
531 /*
532 * If we have a non-supported key-length, then we need to do a
533 * software fallback.
534 */
535 if ((spacc_alg->ctrl_default & SPACC_CRYPTO_ALG_MASK) ==
536 SPA_CTRL_CIPH_ALG_AES &&
537 ctx->cipher_key_len != AES_KEYSIZE_128 &&
538 ctx->cipher_key_len != AES_KEYSIZE_256)
539 return 1;
540
541 return 0;
542}
543
544static int spacc_aead_do_fallback(struct aead_request *req, unsigned alg_type,
545 bool is_encrypt)
546{
547 struct crypto_tfm *old_tfm = crypto_aead_tfm(crypto_aead_reqtfm(req));
548 struct spacc_aead_ctx *ctx = crypto_tfm_ctx(old_tfm);
549 struct aead_request *subreq = aead_request_ctx(req);
550
551 aead_request_set_tfm(subreq, ctx->sw_cipher);
552 aead_request_set_callback(subreq, req->base.flags,
553 req->base.complete, req->base.data);
554 aead_request_set_crypt(subreq, req->src, req->dst, req->cryptlen,
555 req->iv);
556 aead_request_set_ad(subreq, req->assoclen);
557
558 return is_encrypt ? crypto_aead_encrypt(subreq) :
559 crypto_aead_decrypt(subreq);
560}
561
562static void spacc_aead_complete(struct spacc_req *req)
563{
564 spacc_aead_free_ddts(req);
565 req->req->complete(req->req, req->result);
566}
567
568static int spacc_aead_submit(struct spacc_req *req)
569{
570 struct aead_request *aead_req =
571 container_of(req->req, struct aead_request, base);
572 struct crypto_aead *aead = crypto_aead_reqtfm(aead_req);
573 unsigned int authsize = crypto_aead_authsize(aead);
574 struct spacc_aead_ctx *ctx = crypto_aead_ctx(aead);
575 struct aead_alg *alg = crypto_aead_alg(aead);
576 struct spacc_aead *spacc_alg = to_spacc_aead(alg);
577 struct spacc_engine *engine = ctx->generic.engine;
578 u32 ctrl, proc_len, assoc_len;
579
580 req->result = -EINPROGRESS;
581 req->ctx_id = spacc_load_ctx(&ctx->generic, ctx->cipher_key,
582 ctx->cipher_key_len, aead_req->iv, crypto_aead_ivsize(aead),
583 ctx->hash_ctx, ctx->hash_key_len);
584
585 /* Set the source and destination DDT pointers. */
586 writel(req->src_addr, engine->regs + SPA_SRC_PTR_REG_OFFSET);
587 writel(req->dst_addr, engine->regs + SPA_DST_PTR_REG_OFFSET);
588 writel(0, engine->regs + SPA_OFFSET_REG_OFFSET);
589
590 assoc_len = aead_req->assoclen;
591 proc_len = aead_req->cryptlen + assoc_len;
592
593 /*
594 * If we are decrypting, we need to take the length of the ICV out of
595 * the processing length.
596 */
597 if (!req->is_encrypt)
598 proc_len -= authsize;
599
600 writel(proc_len, engine->regs + SPA_PROC_LEN_REG_OFFSET);
601 writel(assoc_len, engine->regs + SPA_AAD_LEN_REG_OFFSET);
602 writel(authsize, engine->regs + SPA_ICV_LEN_REG_OFFSET);
603 writel(0, engine->regs + SPA_ICV_OFFSET_REG_OFFSET);
604 writel(0, engine->regs + SPA_AUX_INFO_REG_OFFSET);
605
606 ctrl = spacc_alg->ctrl_default | (req->ctx_id << SPA_CTRL_CTX_IDX) |
607 (1 << SPA_CTRL_ICV_APPEND);
608 if (req->is_encrypt)
609 ctrl |= (1 << SPA_CTRL_ENCRYPT_IDX) | (1 << SPA_CTRL_AAD_COPY);
610 else
611 ctrl |= (1 << SPA_CTRL_KEY_EXP);
612
613 mod_timer(&engine->packet_timeout, jiffies + PACKET_TIMEOUT);
614
615 writel(ctrl, engine->regs + SPA_CTRL_REG_OFFSET);
616
617 return -EINPROGRESS;
618}
619
620static int spacc_req_submit(struct spacc_req *req);
621
622static void spacc_push(struct spacc_engine *engine)
623{
624 struct spacc_req *req;
625
626 while (!list_empty(&engine->pending) &&
627 engine->in_flight + 1 <= engine->fifo_sz) {
628
629 ++engine->in_flight;
630 req = list_first_entry(&engine->pending, struct spacc_req,
631 list);
632 list_move_tail(&req->list, &engine->in_progress);
633
634 req->result = spacc_req_submit(req);
635 }
636}
637
638/*
639 * Setup an AEAD request for processing. This will configure the engine, load
640 * the context and then start the packet processing.
641 */
642static int spacc_aead_setup(struct aead_request *req,
643 unsigned alg_type, bool is_encrypt)
644{
645 struct crypto_aead *aead = crypto_aead_reqtfm(req);
646 struct aead_alg *alg = crypto_aead_alg(aead);
647 struct spacc_engine *engine = to_spacc_aead(alg)->engine;
648 struct spacc_req *dev_req = aead_request_ctx(req);
649 int err;
650 unsigned long flags;
651
652 dev_req->req = &req->base;
653 dev_req->is_encrypt = is_encrypt;
654 dev_req->result = -EBUSY;
655 dev_req->engine = engine;
656 dev_req->complete = spacc_aead_complete;
657
658 if (unlikely(spacc_aead_need_fallback(req) ||
659 ((err = spacc_aead_make_ddts(req)) == -E2BIG)))
660 return spacc_aead_do_fallback(req, alg_type, is_encrypt);
661
662 if (err)
663 goto out;
664
665 err = -EINPROGRESS;
666 spin_lock_irqsave(&engine->hw_lock, flags);
667 if (unlikely(spacc_fifo_cmd_full(engine)) ||
668 engine->in_flight + 1 > engine->fifo_sz) {
669 if (!(req->base.flags & CRYPTO_TFM_REQ_MAY_BACKLOG)) {
670 err = -EBUSY;
671 spin_unlock_irqrestore(&engine->hw_lock, flags);
672 goto out_free_ddts;
673 }
674 list_add_tail(&dev_req->list, &engine->pending);
675 } else {
676 list_add_tail(&dev_req->list, &engine->pending);
677 spacc_push(engine);
678 }
679 spin_unlock_irqrestore(&engine->hw_lock, flags);
680
681 goto out;
682
683out_free_ddts:
684 spacc_aead_free_ddts(dev_req);
685out:
686 return err;
687}
688
689static int spacc_aead_encrypt(struct aead_request *req)
690{
691 struct crypto_aead *aead = crypto_aead_reqtfm(req);
692 struct spacc_aead *alg = to_spacc_aead(crypto_aead_alg(aead));
693
694 return spacc_aead_setup(req, alg->type, 1);
695}
696
697static int spacc_aead_decrypt(struct aead_request *req)
698{
699 struct crypto_aead *aead = crypto_aead_reqtfm(req);
700 struct spacc_aead *alg = to_spacc_aead(crypto_aead_alg(aead));
701
702 return spacc_aead_setup(req, alg->type, 0);
703}
704
705/*
706 * Initialise a new AEAD context. This is responsible for allocating the
707 * fallback cipher and initialising the context.
708 */
709static int spacc_aead_cra_init(struct crypto_aead *tfm)
710{
711 struct spacc_aead_ctx *ctx = crypto_aead_ctx(tfm);
712 struct aead_alg *alg = crypto_aead_alg(tfm);
713 struct spacc_aead *spacc_alg = to_spacc_aead(alg);
714 struct spacc_engine *engine = spacc_alg->engine;
715
716 ctx->generic.flags = spacc_alg->type;
717 ctx->generic.engine = engine;
718 ctx->sw_cipher = crypto_alloc_aead(alg->base.cra_name, 0,
719 CRYPTO_ALG_NEED_FALLBACK);
720 if (IS_ERR(ctx->sw_cipher))
721 return PTR_ERR(ctx->sw_cipher);
722 ctx->generic.key_offs = spacc_alg->key_offs;
723 ctx->generic.iv_offs = spacc_alg->iv_offs;
724
725 crypto_aead_set_reqsize(
726 tfm,
727 max(sizeof(struct spacc_req),
728 sizeof(struct aead_request) +
729 crypto_aead_reqsize(ctx->sw_cipher)));
730
731 return 0;
732}
733
734/*
735 * Destructor for an AEAD context. This is called when the transform is freed
736 * and must free the fallback cipher.
737 */
738static void spacc_aead_cra_exit(struct crypto_aead *tfm)
739{
740 struct spacc_aead_ctx *ctx = crypto_aead_ctx(tfm);
741
742 crypto_free_aead(ctx->sw_cipher);
743}
744
745/*
746 * Set the DES key for a block cipher transform. This also performs weak key
747 * checking if the transform has requested it.
748 */
749static int spacc_des_setkey(struct crypto_ablkcipher *cipher, const u8 *key,
750 unsigned int len)
751{
752 struct crypto_tfm *tfm = crypto_ablkcipher_tfm(cipher);
753 struct spacc_ablk_ctx *ctx = crypto_tfm_ctx(tfm);
754 u32 tmp[DES_EXPKEY_WORDS];
755
756 if (len > DES3_EDE_KEY_SIZE) {
757 crypto_ablkcipher_set_flags(cipher, CRYPTO_TFM_RES_BAD_KEY_LEN);
758 return -EINVAL;
759 }
760
761 if (unlikely(!des_ekey(tmp, key)) &&
762 (crypto_ablkcipher_get_flags(cipher) & CRYPTO_TFM_REQ_WEAK_KEY)) {
763 tfm->crt_flags |= CRYPTO_TFM_RES_WEAK_KEY;
764 return -EINVAL;
765 }
766
767 memcpy(ctx->key, key, len);
768 ctx->key_len = len;
769
770 return 0;
771}
772
773/*
774 * Set the key for an AES block cipher. Some key lengths are not supported in
775 * hardware so this must also check whether a fallback is needed.
776 */
777static int spacc_aes_setkey(struct crypto_ablkcipher *cipher, const u8 *key,
778 unsigned int len)
779{
780 struct crypto_tfm *tfm = crypto_ablkcipher_tfm(cipher);
781 struct spacc_ablk_ctx *ctx = crypto_tfm_ctx(tfm);
782 int err = 0;
783
784 if (len > AES_MAX_KEY_SIZE) {
785 crypto_ablkcipher_set_flags(cipher, CRYPTO_TFM_RES_BAD_KEY_LEN);
786 return -EINVAL;
787 }
788
789 /*
790 * IPSec engine only supports 128 and 256 bit AES keys. If we get a
791 * request for any other size (192 bits) then we need to do a software
792 * fallback.
793 */
794 if (len != AES_KEYSIZE_128 && len != AES_KEYSIZE_256) {
795 if (!ctx->sw_cipher)
796 return -EINVAL;
797
798 /*
799 * Set the fallback transform to use the same request flags as
800 * the hardware transform.
801 */
802 crypto_skcipher_clear_flags(ctx->sw_cipher,
803 CRYPTO_TFM_REQ_MASK);
804 crypto_skcipher_set_flags(ctx->sw_cipher,
805 cipher->base.crt_flags &
806 CRYPTO_TFM_REQ_MASK);
807
808 err = crypto_skcipher_setkey(ctx->sw_cipher, key, len);
809
810 tfm->crt_flags &= ~CRYPTO_TFM_RES_MASK;
811 tfm->crt_flags |=
812 crypto_skcipher_get_flags(ctx->sw_cipher) &
813 CRYPTO_TFM_RES_MASK;
814
815 if (err)
816 goto sw_setkey_failed;
817 }
818
819 memcpy(ctx->key, key, len);
820 ctx->key_len = len;
821
822sw_setkey_failed:
823 return err;
824}
825
826static int spacc_kasumi_f8_setkey(struct crypto_ablkcipher *cipher,
827 const u8 *key, unsigned int len)
828{
829 struct crypto_tfm *tfm = crypto_ablkcipher_tfm(cipher);
830 struct spacc_ablk_ctx *ctx = crypto_tfm_ctx(tfm);
831 int err = 0;
832
833 if (len > AES_MAX_KEY_SIZE) {
834 crypto_ablkcipher_set_flags(cipher, CRYPTO_TFM_RES_BAD_KEY_LEN);
835 err = -EINVAL;
836 goto out;
837 }
838
839 memcpy(ctx->key, key, len);
840 ctx->key_len = len;
841
842out:
843 return err;
844}
845
846static int spacc_ablk_need_fallback(struct spacc_req *req)
847{
848 struct spacc_ablk_ctx *ctx;
849 struct crypto_tfm *tfm = req->req->tfm;
850 struct crypto_alg *alg = req->req->tfm->__crt_alg;
851 struct spacc_alg *spacc_alg = to_spacc_alg(alg);
852
853 ctx = crypto_tfm_ctx(tfm);
854
855 return (spacc_alg->ctrl_default & SPACC_CRYPTO_ALG_MASK) ==
856 SPA_CTRL_CIPH_ALG_AES &&
857 ctx->key_len != AES_KEYSIZE_128 &&
858 ctx->key_len != AES_KEYSIZE_256;
859}
860
861static void spacc_ablk_complete(struct spacc_req *req)
862{
863 struct ablkcipher_request *ablk_req = ablkcipher_request_cast(req->req);
864
865 if (ablk_req->src != ablk_req->dst) {
866 spacc_free_ddt(req, req->src_ddt, req->src_addr, ablk_req->src,
867 ablk_req->nbytes, DMA_TO_DEVICE);
868 spacc_free_ddt(req, req->dst_ddt, req->dst_addr, ablk_req->dst,
869 ablk_req->nbytes, DMA_FROM_DEVICE);
870 } else
871 spacc_free_ddt(req, req->dst_ddt, req->dst_addr, ablk_req->dst,
872 ablk_req->nbytes, DMA_BIDIRECTIONAL);
873
874 req->req->complete(req->req, req->result);
875}
876
877static int spacc_ablk_submit(struct spacc_req *req)
878{
879 struct crypto_tfm *tfm = req->req->tfm;
880 struct spacc_ablk_ctx *ctx = crypto_tfm_ctx(tfm);
881 struct ablkcipher_request *ablk_req = ablkcipher_request_cast(req->req);
882 struct crypto_alg *alg = req->req->tfm->__crt_alg;
883 struct spacc_alg *spacc_alg = to_spacc_alg(alg);
884 struct spacc_engine *engine = ctx->generic.engine;
885 u32 ctrl;
886
887 req->ctx_id = spacc_load_ctx(&ctx->generic, ctx->key,
888 ctx->key_len, ablk_req->info, alg->cra_ablkcipher.ivsize,
889 NULL, 0);
890
891 writel(req->src_addr, engine->regs + SPA_SRC_PTR_REG_OFFSET);
892 writel(req->dst_addr, engine->regs + SPA_DST_PTR_REG_OFFSET);
893 writel(0, engine->regs + SPA_OFFSET_REG_OFFSET);
894
895 writel(ablk_req->nbytes, engine->regs + SPA_PROC_LEN_REG_OFFSET);
896 writel(0, engine->regs + SPA_ICV_OFFSET_REG_OFFSET);
897 writel(0, engine->regs + SPA_AUX_INFO_REG_OFFSET);
898 writel(0, engine->regs + SPA_AAD_LEN_REG_OFFSET);
899
900 ctrl = spacc_alg->ctrl_default | (req->ctx_id << SPA_CTRL_CTX_IDX) |
901 (req->is_encrypt ? (1 << SPA_CTRL_ENCRYPT_IDX) :
902 (1 << SPA_CTRL_KEY_EXP));
903
904 mod_timer(&engine->packet_timeout, jiffies + PACKET_TIMEOUT);
905
906 writel(ctrl, engine->regs + SPA_CTRL_REG_OFFSET);
907
908 return -EINPROGRESS;
909}
910
911static int spacc_ablk_do_fallback(struct ablkcipher_request *req,
912 unsigned alg_type, bool is_encrypt)
913{
914 struct crypto_tfm *old_tfm =
915 crypto_ablkcipher_tfm(crypto_ablkcipher_reqtfm(req));
916 struct spacc_ablk_ctx *ctx = crypto_tfm_ctx(old_tfm);
917 SKCIPHER_REQUEST_ON_STACK(subreq, ctx->sw_cipher);
918 int err;
919
920 /*
921 * Change the request to use the software fallback transform, and once
922 * the ciphering has completed, put the old transform back into the
923 * request.
924 */
925 skcipher_request_set_tfm(subreq, ctx->sw_cipher);
926 skcipher_request_set_callback(subreq, req->base.flags, NULL, NULL);
927 skcipher_request_set_crypt(subreq, req->src, req->dst,
928 req->nbytes, req->info);
929 err = is_encrypt ? crypto_skcipher_encrypt(subreq) :
930 crypto_skcipher_decrypt(subreq);
931 skcipher_request_zero(subreq);
932
933 return err;
934}
935
936static int spacc_ablk_setup(struct ablkcipher_request *req, unsigned alg_type,
937 bool is_encrypt)
938{
939 struct crypto_alg *alg = req->base.tfm->__crt_alg;
940 struct spacc_engine *engine = to_spacc_alg(alg)->engine;
941 struct spacc_req *dev_req = ablkcipher_request_ctx(req);
942 unsigned long flags;
943 int err = -ENOMEM;
944
945 dev_req->req = &req->base;
946 dev_req->is_encrypt = is_encrypt;
947 dev_req->engine = engine;
948 dev_req->complete = spacc_ablk_complete;
949 dev_req->result = -EINPROGRESS;
950
951 if (unlikely(spacc_ablk_need_fallback(dev_req)))
952 return spacc_ablk_do_fallback(req, alg_type, is_encrypt);
953
954 /*
955 * Create the DDT's for the engine. If we share the same source and
956 * destination then we can optimize by reusing the DDT's.
957 */
958 if (req->src != req->dst) {
959 dev_req->src_ddt = spacc_sg_to_ddt(engine, req->src,
960 req->nbytes, DMA_TO_DEVICE, &dev_req->src_addr);
961 if (!dev_req->src_ddt)
962 goto out;
963
964 dev_req->dst_ddt = spacc_sg_to_ddt(engine, req->dst,
965 req->nbytes, DMA_FROM_DEVICE, &dev_req->dst_addr);
966 if (!dev_req->dst_ddt)
967 goto out_free_src;
968 } else {
969 dev_req->dst_ddt = spacc_sg_to_ddt(engine, req->dst,
970 req->nbytes, DMA_BIDIRECTIONAL, &dev_req->dst_addr);
971 if (!dev_req->dst_ddt)
972 goto out;
973
974 dev_req->src_ddt = NULL;
975 dev_req->src_addr = dev_req->dst_addr;
976 }
977
978 err = -EINPROGRESS;
979 spin_lock_irqsave(&engine->hw_lock, flags);
980 /*
981 * Check if the engine will accept the operation now. If it won't then
982 * we either stick it on the end of a pending list if we can backlog,
983 * or bailout with an error if not.
984 */
985 if (unlikely(spacc_fifo_cmd_full(engine)) ||
986 engine->in_flight + 1 > engine->fifo_sz) {
987 if (!(req->base.flags & CRYPTO_TFM_REQ_MAY_BACKLOG)) {
988 err = -EBUSY;
989 spin_unlock_irqrestore(&engine->hw_lock, flags);
990 goto out_free_ddts;
991 }
992 list_add_tail(&dev_req->list, &engine->pending);
993 } else {
994 list_add_tail(&dev_req->list, &engine->pending);
995 spacc_push(engine);
996 }
997 spin_unlock_irqrestore(&engine->hw_lock, flags);
998
999 goto out;
1000
1001out_free_ddts:
1002 spacc_free_ddt(dev_req, dev_req->dst_ddt, dev_req->dst_addr, req->dst,
1003 req->nbytes, req->src == req->dst ?
1004 DMA_BIDIRECTIONAL : DMA_FROM_DEVICE);
1005out_free_src:
1006 if (req->src != req->dst)
1007 spacc_free_ddt(dev_req, dev_req->src_ddt, dev_req->src_addr,
1008 req->src, req->nbytes, DMA_TO_DEVICE);
1009out:
1010 return err;
1011}
1012
1013static int spacc_ablk_cra_init(struct crypto_tfm *tfm)
1014{
1015 struct spacc_ablk_ctx *ctx = crypto_tfm_ctx(tfm);
1016 struct crypto_alg *alg = tfm->__crt_alg;
1017 struct spacc_alg *spacc_alg = to_spacc_alg(alg);
1018 struct spacc_engine *engine = spacc_alg->engine;
1019
1020 ctx->generic.flags = spacc_alg->type;
1021 ctx->generic.engine = engine;
1022 if (alg->cra_flags & CRYPTO_ALG_NEED_FALLBACK) {
1023 ctx->sw_cipher = crypto_alloc_skcipher(
1024 alg->cra_name, 0, CRYPTO_ALG_ASYNC |
1025 CRYPTO_ALG_NEED_FALLBACK);
1026 if (IS_ERR(ctx->sw_cipher)) {
1027 dev_warn(engine->dev, "failed to allocate fallback for %s\n",
1028 alg->cra_name);
1029 return PTR_ERR(ctx->sw_cipher);
1030 }
1031 }
1032 ctx->generic.key_offs = spacc_alg->key_offs;
1033 ctx->generic.iv_offs = spacc_alg->iv_offs;
1034
1035 tfm->crt_ablkcipher.reqsize = sizeof(struct spacc_req);
1036
1037 return 0;
1038}
1039
1040static void spacc_ablk_cra_exit(struct crypto_tfm *tfm)
1041{
1042 struct spacc_ablk_ctx *ctx = crypto_tfm_ctx(tfm);
1043
1044 crypto_free_skcipher(ctx->sw_cipher);
1045}
1046
1047static int spacc_ablk_encrypt(struct ablkcipher_request *req)
1048{
1049 struct crypto_ablkcipher *cipher = crypto_ablkcipher_reqtfm(req);
1050 struct crypto_tfm *tfm = crypto_ablkcipher_tfm(cipher);
1051 struct spacc_alg *alg = to_spacc_alg(tfm->__crt_alg);
1052
1053 return spacc_ablk_setup(req, alg->type, 1);
1054}
1055
1056static int spacc_ablk_decrypt(struct ablkcipher_request *req)
1057{
1058 struct crypto_ablkcipher *cipher = crypto_ablkcipher_reqtfm(req);
1059 struct crypto_tfm *tfm = crypto_ablkcipher_tfm(cipher);
1060 struct spacc_alg *alg = to_spacc_alg(tfm->__crt_alg);
1061
1062 return spacc_ablk_setup(req, alg->type, 0);
1063}
1064
1065static inline int spacc_fifo_stat_empty(struct spacc_engine *engine)
1066{
1067 return readl(engine->regs + SPA_FIFO_STAT_REG_OFFSET) &
1068 SPA_FIFO_STAT_EMPTY;
1069}
1070
1071static void spacc_process_done(struct spacc_engine *engine)
1072{
1073 struct spacc_req *req;
1074 unsigned long flags;
1075
1076 spin_lock_irqsave(&engine->hw_lock, flags);
1077
1078 while (!spacc_fifo_stat_empty(engine)) {
1079 req = list_first_entry(&engine->in_progress, struct spacc_req,
1080 list);
1081 list_move_tail(&req->list, &engine->completed);
1082 --engine->in_flight;
1083
1084 /* POP the status register. */
1085 writel(~0, engine->regs + SPA_STAT_POP_REG_OFFSET);
1086 req->result = (readl(engine->regs + SPA_STATUS_REG_OFFSET) &
1087 SPA_STATUS_RES_CODE_MASK) >> SPA_STATUS_RES_CODE_OFFSET;
1088
1089 /*
1090 * Convert the SPAcc error status into the standard POSIX error
1091 * codes.
1092 */
1093 if (unlikely(req->result)) {
1094 switch (req->result) {
1095 case SPA_STATUS_ICV_FAIL:
1096 req->result = -EBADMSG;
1097 break;
1098
1099 case SPA_STATUS_MEMORY_ERROR:
1100 dev_warn(engine->dev,
1101 "memory error triggered\n");
1102 req->result = -EFAULT;
1103 break;
1104
1105 case SPA_STATUS_BLOCK_ERROR:
1106 dev_warn(engine->dev,
1107 "block error triggered\n");
1108 req->result = -EIO;
1109 break;
1110 }
1111 }
1112 }
1113
1114 tasklet_schedule(&engine->complete);
1115
1116 spin_unlock_irqrestore(&engine->hw_lock, flags);
1117}
1118
1119static irqreturn_t spacc_spacc_irq(int irq, void *dev)
1120{
1121 struct spacc_engine *engine = (struct spacc_engine *)dev;
1122 u32 spacc_irq_stat = readl(engine->regs + SPA_IRQ_STAT_REG_OFFSET);
1123
1124 writel(spacc_irq_stat, engine->regs + SPA_IRQ_STAT_REG_OFFSET);
1125 spacc_process_done(engine);
1126
1127 return IRQ_HANDLED;
1128}
1129
1130static void spacc_packet_timeout(struct timer_list *t)
1131{
1132 struct spacc_engine *engine = from_timer(engine, t, packet_timeout);
1133
1134 spacc_process_done(engine);
1135}
1136
1137static int spacc_req_submit(struct spacc_req *req)
1138{
1139 struct crypto_alg *alg = req->req->tfm->__crt_alg;
1140
1141 if (CRYPTO_ALG_TYPE_AEAD == (CRYPTO_ALG_TYPE_MASK & alg->cra_flags))
1142 return spacc_aead_submit(req);
1143 else
1144 return spacc_ablk_submit(req);
1145}
1146
1147static void spacc_spacc_complete(unsigned long data)
1148{
1149 struct spacc_engine *engine = (struct spacc_engine *)data;
1150 struct spacc_req *req, *tmp;
1151 unsigned long flags;
1152 LIST_HEAD(completed);
1153
1154 spin_lock_irqsave(&engine->hw_lock, flags);
1155
1156 list_splice_init(&engine->completed, &completed);
1157 spacc_push(engine);
1158 if (engine->in_flight)
1159 mod_timer(&engine->packet_timeout, jiffies + PACKET_TIMEOUT);
1160
1161 spin_unlock_irqrestore(&engine->hw_lock, flags);
1162
1163 list_for_each_entry_safe(req, tmp, &completed, list) {
1164 list_del(&req->list);
1165 req->complete(req);
1166 }
1167}
1168
1169#ifdef CONFIG_PM
1170static int spacc_suspend(struct device *dev)
1171{
1172 struct platform_device *pdev = to_platform_device(dev);
1173 struct spacc_engine *engine = platform_get_drvdata(pdev);
1174
1175 /*
1176 * We only support standby mode. All we have to do is gate the clock to
1177 * the spacc. The hardware will preserve state until we turn it back
1178 * on again.
1179 */
1180 clk_disable(engine->clk);
1181
1182 return 0;
1183}
1184
1185static int spacc_resume(struct device *dev)
1186{
1187 struct platform_device *pdev = to_platform_device(dev);
1188 struct spacc_engine *engine = platform_get_drvdata(pdev);
1189
1190 return clk_enable(engine->clk);
1191}
1192
1193static const struct dev_pm_ops spacc_pm_ops = {
1194 .suspend = spacc_suspend,
1195 .resume = spacc_resume,
1196};
1197#endif /* CONFIG_PM */
1198
1199static inline struct spacc_engine *spacc_dev_to_engine(struct device *dev)
1200{
1201 return dev ? platform_get_drvdata(to_platform_device(dev)) : NULL;
1202}
1203
1204static ssize_t spacc_stat_irq_thresh_show(struct device *dev,
1205 struct device_attribute *attr,
1206 char *buf)
1207{
1208 struct spacc_engine *engine = spacc_dev_to_engine(dev);
1209
1210 return snprintf(buf, PAGE_SIZE, "%u\n", engine->stat_irq_thresh);
1211}
1212
1213static ssize_t spacc_stat_irq_thresh_store(struct device *dev,
1214 struct device_attribute *attr,
1215 const char *buf, size_t len)
1216{
1217 struct spacc_engine *engine = spacc_dev_to_engine(dev);
1218 unsigned long thresh;
1219
1220 if (kstrtoul(buf, 0, &thresh))
1221 return -EINVAL;
1222
1223 thresh = clamp(thresh, 1UL, engine->fifo_sz - 1);
1224
1225 engine->stat_irq_thresh = thresh;
1226 writel(engine->stat_irq_thresh << SPA_IRQ_CTRL_STAT_CNT_OFFSET,
1227 engine->regs + SPA_IRQ_CTRL_REG_OFFSET);
1228
1229 return len;
1230}
1231static DEVICE_ATTR(stat_irq_thresh, 0644, spacc_stat_irq_thresh_show,
1232 spacc_stat_irq_thresh_store);
1233
1234static struct spacc_alg ipsec_engine_algs[] = {
1235 {
1236 .ctrl_default = SPA_CTRL_CIPH_ALG_AES | SPA_CTRL_CIPH_MODE_CBC,
1237 .key_offs = 0,
1238 .iv_offs = AES_MAX_KEY_SIZE,
1239 .alg = {
1240 .cra_name = "cbc(aes)",
1241 .cra_driver_name = "cbc-aes-picoxcell",
1242 .cra_priority = SPACC_CRYPTO_ALG_PRIORITY,
1243 .cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER |
1244 CRYPTO_ALG_KERN_DRIVER_ONLY |
1245 CRYPTO_ALG_ASYNC |
1246 CRYPTO_ALG_NEED_FALLBACK,
1247 .cra_blocksize = AES_BLOCK_SIZE,
1248 .cra_ctxsize = sizeof(struct spacc_ablk_ctx),
1249 .cra_type = &crypto_ablkcipher_type,
1250 .cra_module = THIS_MODULE,
1251 .cra_ablkcipher = {
1252 .setkey = spacc_aes_setkey,
1253 .encrypt = spacc_ablk_encrypt,
1254 .decrypt = spacc_ablk_decrypt,
1255 .min_keysize = AES_MIN_KEY_SIZE,
1256 .max_keysize = AES_MAX_KEY_SIZE,
1257 .ivsize = AES_BLOCK_SIZE,
1258 },
1259 .cra_init = spacc_ablk_cra_init,
1260 .cra_exit = spacc_ablk_cra_exit,
1261 },
1262 },
1263 {
1264 .key_offs = 0,
1265 .iv_offs = AES_MAX_KEY_SIZE,
1266 .ctrl_default = SPA_CTRL_CIPH_ALG_AES | SPA_CTRL_CIPH_MODE_ECB,
1267 .alg = {
1268 .cra_name = "ecb(aes)",
1269 .cra_driver_name = "ecb-aes-picoxcell",
1270 .cra_priority = SPACC_CRYPTO_ALG_PRIORITY,
1271 .cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER |
1272 CRYPTO_ALG_KERN_DRIVER_ONLY |
1273 CRYPTO_ALG_ASYNC | CRYPTO_ALG_NEED_FALLBACK,
1274 .cra_blocksize = AES_BLOCK_SIZE,
1275 .cra_ctxsize = sizeof(struct spacc_ablk_ctx),
1276 .cra_type = &crypto_ablkcipher_type,
1277 .cra_module = THIS_MODULE,
1278 .cra_ablkcipher = {
1279 .setkey = spacc_aes_setkey,
1280 .encrypt = spacc_ablk_encrypt,
1281 .decrypt = spacc_ablk_decrypt,
1282 .min_keysize = AES_MIN_KEY_SIZE,
1283 .max_keysize = AES_MAX_KEY_SIZE,
1284 },
1285 .cra_init = spacc_ablk_cra_init,
1286 .cra_exit = spacc_ablk_cra_exit,
1287 },
1288 },
1289 {
1290 .key_offs = DES_BLOCK_SIZE,
1291 .iv_offs = 0,
1292 .ctrl_default = SPA_CTRL_CIPH_ALG_DES | SPA_CTRL_CIPH_MODE_CBC,
1293 .alg = {
1294 .cra_name = "cbc(des)",
1295 .cra_driver_name = "cbc-des-picoxcell",
1296 .cra_priority = SPACC_CRYPTO_ALG_PRIORITY,
1297 .cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER |
1298 CRYPTO_ALG_ASYNC |
1299 CRYPTO_ALG_KERN_DRIVER_ONLY,
1300 .cra_blocksize = DES_BLOCK_SIZE,
1301 .cra_ctxsize = sizeof(struct spacc_ablk_ctx),
1302 .cra_type = &crypto_ablkcipher_type,
1303 .cra_module = THIS_MODULE,
1304 .cra_ablkcipher = {
1305 .setkey = spacc_des_setkey,
1306 .encrypt = spacc_ablk_encrypt,
1307 .decrypt = spacc_ablk_decrypt,
1308 .min_keysize = DES_KEY_SIZE,
1309 .max_keysize = DES_KEY_SIZE,
1310 .ivsize = DES_BLOCK_SIZE,
1311 },
1312 .cra_init = spacc_ablk_cra_init,
1313 .cra_exit = spacc_ablk_cra_exit,
1314 },
1315 },
1316 {
1317 .key_offs = DES_BLOCK_SIZE,
1318 .iv_offs = 0,
1319 .ctrl_default = SPA_CTRL_CIPH_ALG_DES | SPA_CTRL_CIPH_MODE_ECB,
1320 .alg = {
1321 .cra_name = "ecb(des)",
1322 .cra_driver_name = "ecb-des-picoxcell",
1323 .cra_priority = SPACC_CRYPTO_ALG_PRIORITY,
1324 .cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER |
1325 CRYPTO_ALG_ASYNC |
1326 CRYPTO_ALG_KERN_DRIVER_ONLY,
1327 .cra_blocksize = DES_BLOCK_SIZE,
1328 .cra_ctxsize = sizeof(struct spacc_ablk_ctx),
1329 .cra_type = &crypto_ablkcipher_type,
1330 .cra_module = THIS_MODULE,
1331 .cra_ablkcipher = {
1332 .setkey = spacc_des_setkey,
1333 .encrypt = spacc_ablk_encrypt,
1334 .decrypt = spacc_ablk_decrypt,
1335 .min_keysize = DES_KEY_SIZE,
1336 .max_keysize = DES_KEY_SIZE,
1337 },
1338 .cra_init = spacc_ablk_cra_init,
1339 .cra_exit = spacc_ablk_cra_exit,
1340 },
1341 },
1342 {
1343 .key_offs = DES_BLOCK_SIZE,
1344 .iv_offs = 0,
1345 .ctrl_default = SPA_CTRL_CIPH_ALG_DES | SPA_CTRL_CIPH_MODE_CBC,
1346 .alg = {
1347 .cra_name = "cbc(des3_ede)",
1348 .cra_driver_name = "cbc-des3-ede-picoxcell",
1349 .cra_priority = SPACC_CRYPTO_ALG_PRIORITY,
1350 .cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER |
1351 CRYPTO_ALG_ASYNC |
1352 CRYPTO_ALG_KERN_DRIVER_ONLY,
1353 .cra_blocksize = DES3_EDE_BLOCK_SIZE,
1354 .cra_ctxsize = sizeof(struct spacc_ablk_ctx),
1355 .cra_type = &crypto_ablkcipher_type,
1356 .cra_module = THIS_MODULE,
1357 .cra_ablkcipher = {
1358 .setkey = spacc_des_setkey,
1359 .encrypt = spacc_ablk_encrypt,
1360 .decrypt = spacc_ablk_decrypt,
1361 .min_keysize = DES3_EDE_KEY_SIZE,
1362 .max_keysize = DES3_EDE_KEY_SIZE,
1363 .ivsize = DES3_EDE_BLOCK_SIZE,
1364 },
1365 .cra_init = spacc_ablk_cra_init,
1366 .cra_exit = spacc_ablk_cra_exit,
1367 },
1368 },
1369 {
1370 .key_offs = DES_BLOCK_SIZE,
1371 .iv_offs = 0,
1372 .ctrl_default = SPA_CTRL_CIPH_ALG_DES | SPA_CTRL_CIPH_MODE_ECB,
1373 .alg = {
1374 .cra_name = "ecb(des3_ede)",
1375 .cra_driver_name = "ecb-des3-ede-picoxcell",
1376 .cra_priority = SPACC_CRYPTO_ALG_PRIORITY,
1377 .cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER |
1378 CRYPTO_ALG_ASYNC |
1379 CRYPTO_ALG_KERN_DRIVER_ONLY,
1380 .cra_blocksize = DES3_EDE_BLOCK_SIZE,
1381 .cra_ctxsize = sizeof(struct spacc_ablk_ctx),
1382 .cra_type = &crypto_ablkcipher_type,
1383 .cra_module = THIS_MODULE,
1384 .cra_ablkcipher = {
1385 .setkey = spacc_des_setkey,
1386 .encrypt = spacc_ablk_encrypt,
1387 .decrypt = spacc_ablk_decrypt,
1388 .min_keysize = DES3_EDE_KEY_SIZE,
1389 .max_keysize = DES3_EDE_KEY_SIZE,
1390 },
1391 .cra_init = spacc_ablk_cra_init,
1392 .cra_exit = spacc_ablk_cra_exit,
1393 },
1394 },
1395};
1396
1397static struct spacc_aead ipsec_engine_aeads[] = {
1398 {
1399 .ctrl_default = SPA_CTRL_CIPH_ALG_AES |
1400 SPA_CTRL_CIPH_MODE_CBC |
1401 SPA_CTRL_HASH_ALG_SHA |
1402 SPA_CTRL_HASH_MODE_HMAC,
1403 .key_offs = 0,
1404 .iv_offs = AES_MAX_KEY_SIZE,
1405 .alg = {
1406 .base = {
1407 .cra_name = "authenc(hmac(sha1),cbc(aes))",
1408 .cra_driver_name = "authenc-hmac-sha1-"
1409 "cbc-aes-picoxcell",
1410 .cra_priority = SPACC_CRYPTO_ALG_PRIORITY,
1411 .cra_flags = CRYPTO_ALG_ASYNC |
1412 CRYPTO_ALG_NEED_FALLBACK |
1413 CRYPTO_ALG_KERN_DRIVER_ONLY,
1414 .cra_blocksize = AES_BLOCK_SIZE,
1415 .cra_ctxsize = sizeof(struct spacc_aead_ctx),
1416 .cra_module = THIS_MODULE,
1417 },
1418 .setkey = spacc_aead_setkey,
1419 .setauthsize = spacc_aead_setauthsize,
1420 .encrypt = spacc_aead_encrypt,
1421 .decrypt = spacc_aead_decrypt,
1422 .ivsize = AES_BLOCK_SIZE,
1423 .maxauthsize = SHA1_DIGEST_SIZE,
1424 .init = spacc_aead_cra_init,
1425 .exit = spacc_aead_cra_exit,
1426 },
1427 },
1428 {
1429 .ctrl_default = SPA_CTRL_CIPH_ALG_AES |
1430 SPA_CTRL_CIPH_MODE_CBC |
1431 SPA_CTRL_HASH_ALG_SHA256 |
1432 SPA_CTRL_HASH_MODE_HMAC,
1433 .key_offs = 0,
1434 .iv_offs = AES_MAX_KEY_SIZE,
1435 .alg = {
1436 .base = {
1437 .cra_name = "authenc(hmac(sha256),cbc(aes))",
1438 .cra_driver_name = "authenc-hmac-sha256-"
1439 "cbc-aes-picoxcell",
1440 .cra_priority = SPACC_CRYPTO_ALG_PRIORITY,
1441 .cra_flags = CRYPTO_ALG_ASYNC |
1442 CRYPTO_ALG_NEED_FALLBACK |
1443 CRYPTO_ALG_KERN_DRIVER_ONLY,
1444 .cra_blocksize = AES_BLOCK_SIZE,
1445 .cra_ctxsize = sizeof(struct spacc_aead_ctx),
1446 .cra_module = THIS_MODULE,
1447 },
1448 .setkey = spacc_aead_setkey,
1449 .setauthsize = spacc_aead_setauthsize,
1450 .encrypt = spacc_aead_encrypt,
1451 .decrypt = spacc_aead_decrypt,
1452 .ivsize = AES_BLOCK_SIZE,
1453 .maxauthsize = SHA256_DIGEST_SIZE,
1454 .init = spacc_aead_cra_init,
1455 .exit = spacc_aead_cra_exit,
1456 },
1457 },
1458 {
1459 .key_offs = 0,
1460 .iv_offs = AES_MAX_KEY_SIZE,
1461 .ctrl_default = SPA_CTRL_CIPH_ALG_AES |
1462 SPA_CTRL_CIPH_MODE_CBC |
1463 SPA_CTRL_HASH_ALG_MD5 |
1464 SPA_CTRL_HASH_MODE_HMAC,
1465 .alg = {
1466 .base = {
1467 .cra_name = "authenc(hmac(md5),cbc(aes))",
1468 .cra_driver_name = "authenc-hmac-md5-"
1469 "cbc-aes-picoxcell",
1470 .cra_priority = SPACC_CRYPTO_ALG_PRIORITY,
1471 .cra_flags = CRYPTO_ALG_ASYNC |
1472 CRYPTO_ALG_NEED_FALLBACK |
1473 CRYPTO_ALG_KERN_DRIVER_ONLY,
1474 .cra_blocksize = AES_BLOCK_SIZE,
1475 .cra_ctxsize = sizeof(struct spacc_aead_ctx),
1476 .cra_module = THIS_MODULE,
1477 },
1478 .setkey = spacc_aead_setkey,
1479 .setauthsize = spacc_aead_setauthsize,
1480 .encrypt = spacc_aead_encrypt,
1481 .decrypt = spacc_aead_decrypt,
1482 .ivsize = AES_BLOCK_SIZE,
1483 .maxauthsize = MD5_DIGEST_SIZE,
1484 .init = spacc_aead_cra_init,
1485 .exit = spacc_aead_cra_exit,
1486 },
1487 },
1488 {
1489 .key_offs = DES_BLOCK_SIZE,
1490 .iv_offs = 0,
1491 .ctrl_default = SPA_CTRL_CIPH_ALG_DES |
1492 SPA_CTRL_CIPH_MODE_CBC |
1493 SPA_CTRL_HASH_ALG_SHA |
1494 SPA_CTRL_HASH_MODE_HMAC,
1495 .alg = {
1496 .base = {
1497 .cra_name = "authenc(hmac(sha1),cbc(des3_ede))",
1498 .cra_driver_name = "authenc-hmac-sha1-"
1499 "cbc-3des-picoxcell",
1500 .cra_priority = SPACC_CRYPTO_ALG_PRIORITY,
1501 .cra_flags = CRYPTO_ALG_ASYNC |
1502 CRYPTO_ALG_NEED_FALLBACK |
1503 CRYPTO_ALG_KERN_DRIVER_ONLY,
1504 .cra_blocksize = DES3_EDE_BLOCK_SIZE,
1505 .cra_ctxsize = sizeof(struct spacc_aead_ctx),
1506 .cra_module = THIS_MODULE,
1507 },
1508 .setkey = spacc_aead_setkey,
1509 .setauthsize = spacc_aead_setauthsize,
1510 .encrypt = spacc_aead_encrypt,
1511 .decrypt = spacc_aead_decrypt,
1512 .ivsize = DES3_EDE_BLOCK_SIZE,
1513 .maxauthsize = SHA1_DIGEST_SIZE,
1514 .init = spacc_aead_cra_init,
1515 .exit = spacc_aead_cra_exit,
1516 },
1517 },
1518 {
1519 .key_offs = DES_BLOCK_SIZE,
1520 .iv_offs = 0,
1521 .ctrl_default = SPA_CTRL_CIPH_ALG_AES |
1522 SPA_CTRL_CIPH_MODE_CBC |
1523 SPA_CTRL_HASH_ALG_SHA256 |
1524 SPA_CTRL_HASH_MODE_HMAC,
1525 .alg = {
1526 .base = {
1527 .cra_name = "authenc(hmac(sha256),"
1528 "cbc(des3_ede))",
1529 .cra_driver_name = "authenc-hmac-sha256-"
1530 "cbc-3des-picoxcell",
1531 .cra_priority = SPACC_CRYPTO_ALG_PRIORITY,
1532 .cra_flags = CRYPTO_ALG_ASYNC |
1533 CRYPTO_ALG_NEED_FALLBACK |
1534 CRYPTO_ALG_KERN_DRIVER_ONLY,
1535 .cra_blocksize = DES3_EDE_BLOCK_SIZE,
1536 .cra_ctxsize = sizeof(struct spacc_aead_ctx),
1537 .cra_module = THIS_MODULE,
1538 },
1539 .setkey = spacc_aead_setkey,
1540 .setauthsize = spacc_aead_setauthsize,
1541 .encrypt = spacc_aead_encrypt,
1542 .decrypt = spacc_aead_decrypt,
1543 .ivsize = DES3_EDE_BLOCK_SIZE,
1544 .maxauthsize = SHA256_DIGEST_SIZE,
1545 .init = spacc_aead_cra_init,
1546 .exit = spacc_aead_cra_exit,
1547 },
1548 },
1549 {
1550 .key_offs = DES_BLOCK_SIZE,
1551 .iv_offs = 0,
1552 .ctrl_default = SPA_CTRL_CIPH_ALG_DES |
1553 SPA_CTRL_CIPH_MODE_CBC |
1554 SPA_CTRL_HASH_ALG_MD5 |
1555 SPA_CTRL_HASH_MODE_HMAC,
1556 .alg = {
1557 .base = {
1558 .cra_name = "authenc(hmac(md5),cbc(des3_ede))",
1559 .cra_driver_name = "authenc-hmac-md5-"
1560 "cbc-3des-picoxcell",
1561 .cra_priority = SPACC_CRYPTO_ALG_PRIORITY,
1562 .cra_flags = CRYPTO_ALG_ASYNC |
1563 CRYPTO_ALG_NEED_FALLBACK |
1564 CRYPTO_ALG_KERN_DRIVER_ONLY,
1565 .cra_blocksize = DES3_EDE_BLOCK_SIZE,
1566 .cra_ctxsize = sizeof(struct spacc_aead_ctx),
1567 .cra_module = THIS_MODULE,
1568 },
1569 .setkey = spacc_aead_setkey,
1570 .setauthsize = spacc_aead_setauthsize,
1571 .encrypt = spacc_aead_encrypt,
1572 .decrypt = spacc_aead_decrypt,
1573 .ivsize = DES3_EDE_BLOCK_SIZE,
1574 .maxauthsize = MD5_DIGEST_SIZE,
1575 .init = spacc_aead_cra_init,
1576 .exit = spacc_aead_cra_exit,
1577 },
1578 },
1579};
1580
1581static struct spacc_alg l2_engine_algs[] = {
1582 {
1583 .key_offs = 0,
1584 .iv_offs = SPACC_CRYPTO_KASUMI_F8_KEY_LEN,
1585 .ctrl_default = SPA_CTRL_CIPH_ALG_KASUMI |
1586 SPA_CTRL_CIPH_MODE_F8,
1587 .alg = {
1588 .cra_name = "f8(kasumi)",
1589 .cra_driver_name = "f8-kasumi-picoxcell",
1590 .cra_priority = SPACC_CRYPTO_ALG_PRIORITY,
1591 .cra_flags = CRYPTO_ALG_TYPE_GIVCIPHER |
1592 CRYPTO_ALG_ASYNC |
1593 CRYPTO_ALG_KERN_DRIVER_ONLY,
1594 .cra_blocksize = 8,
1595 .cra_ctxsize = sizeof(struct spacc_ablk_ctx),
1596 .cra_type = &crypto_ablkcipher_type,
1597 .cra_module = THIS_MODULE,
1598 .cra_ablkcipher = {
1599 .setkey = spacc_kasumi_f8_setkey,
1600 .encrypt = spacc_ablk_encrypt,
1601 .decrypt = spacc_ablk_decrypt,
1602 .min_keysize = 16,
1603 .max_keysize = 16,
1604 .ivsize = 8,
1605 },
1606 .cra_init = spacc_ablk_cra_init,
1607 .cra_exit = spacc_ablk_cra_exit,
1608 },
1609 },
1610};
1611
1612#ifdef CONFIG_OF
1613static const struct of_device_id spacc_of_id_table[] = {
1614 { .compatible = "picochip,spacc-ipsec" },
1615 { .compatible = "picochip,spacc-l2" },
1616 {}
1617};
1618MODULE_DEVICE_TABLE(of, spacc_of_id_table);
1619#endif /* CONFIG_OF */
1620
1621static int spacc_probe(struct platform_device *pdev)
1622{
1623 int i, err, ret;
1624 struct resource *mem, *irq;
1625 struct device_node *np = pdev->dev.of_node;
1626 struct spacc_engine *engine = devm_kzalloc(&pdev->dev, sizeof(*engine),
1627 GFP_KERNEL);
1628 if (!engine)
1629 return -ENOMEM;
1630
1631 if (of_device_is_compatible(np, "picochip,spacc-ipsec")) {
1632 engine->max_ctxs = SPACC_CRYPTO_IPSEC_MAX_CTXS;
1633 engine->cipher_pg_sz = SPACC_CRYPTO_IPSEC_CIPHER_PG_SZ;
1634 engine->hash_pg_sz = SPACC_CRYPTO_IPSEC_HASH_PG_SZ;
1635 engine->fifo_sz = SPACC_CRYPTO_IPSEC_FIFO_SZ;
1636 engine->algs = ipsec_engine_algs;
1637 engine->num_algs = ARRAY_SIZE(ipsec_engine_algs);
1638 engine->aeads = ipsec_engine_aeads;
1639 engine->num_aeads = ARRAY_SIZE(ipsec_engine_aeads);
1640 } else if (of_device_is_compatible(np, "picochip,spacc-l2")) {
1641 engine->max_ctxs = SPACC_CRYPTO_L2_MAX_CTXS;
1642 engine->cipher_pg_sz = SPACC_CRYPTO_L2_CIPHER_PG_SZ;
1643 engine->hash_pg_sz = SPACC_CRYPTO_L2_HASH_PG_SZ;
1644 engine->fifo_sz = SPACC_CRYPTO_L2_FIFO_SZ;
1645 engine->algs = l2_engine_algs;
1646 engine->num_algs = ARRAY_SIZE(l2_engine_algs);
1647 } else {
1648 return -EINVAL;
1649 }
1650
1651 engine->name = dev_name(&pdev->dev);
1652
1653 mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1654 engine->regs = devm_ioremap_resource(&pdev->dev, mem);
1655 if (IS_ERR(engine->regs))
1656 return PTR_ERR(engine->regs);
1657
1658 irq = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
1659 if (!irq) {
1660 dev_err(&pdev->dev, "no memory/irq resource for engine\n");
1661 return -ENXIO;
1662 }
1663
1664 if (devm_request_irq(&pdev->dev, irq->start, spacc_spacc_irq, 0,
1665 engine->name, engine)) {
1666 dev_err(engine->dev, "failed to request IRQ\n");
1667 return -EBUSY;
1668 }
1669
1670 engine->dev = &pdev->dev;
1671 engine->cipher_ctx_base = engine->regs + SPA_CIPH_KEY_BASE_REG_OFFSET;
1672 engine->hash_key_base = engine->regs + SPA_HASH_KEY_BASE_REG_OFFSET;
1673
1674 engine->req_pool = dmam_pool_create(engine->name, engine->dev,
1675 MAX_DDT_LEN * sizeof(struct spacc_ddt), 8, SZ_64K);
1676 if (!engine->req_pool)
1677 return -ENOMEM;
1678
1679 spin_lock_init(&engine->hw_lock);
1680
1681 engine->clk = clk_get(&pdev->dev, "ref");
1682 if (IS_ERR(engine->clk)) {
1683 dev_info(&pdev->dev, "clk unavailable\n");
1684 return PTR_ERR(engine->clk);
1685 }
1686
1687 if (clk_prepare_enable(engine->clk)) {
1688 dev_info(&pdev->dev, "unable to prepare/enable clk\n");
1689 ret = -EIO;
1690 goto err_clk_put;
1691 }
1692
1693 ret = device_create_file(&pdev->dev, &dev_attr_stat_irq_thresh);
1694 if (ret)
1695 goto err_clk_disable;
1696
1697
1698 /*
1699 * Use an IRQ threshold of 50% as a default. This seems to be a
1700 * reasonable trade off of latency against throughput but can be
1701 * changed at runtime.
1702 */
1703 engine->stat_irq_thresh = (engine->fifo_sz / 2);
1704
1705 /*
1706 * Configure the interrupts. We only use the STAT_CNT interrupt as we
1707 * only submit a new packet for processing when we complete another in
1708 * the queue. This minimizes time spent in the interrupt handler.
1709 */
1710 writel(engine->stat_irq_thresh << SPA_IRQ_CTRL_STAT_CNT_OFFSET,
1711 engine->regs + SPA_IRQ_CTRL_REG_OFFSET);
1712 writel(SPA_IRQ_EN_STAT_EN | SPA_IRQ_EN_GLBL_EN,
1713 engine->regs + SPA_IRQ_EN_REG_OFFSET);
1714
1715 timer_setup(&engine->packet_timeout, spacc_packet_timeout, 0);
1716
1717 INIT_LIST_HEAD(&engine->pending);
1718 INIT_LIST_HEAD(&engine->completed);
1719 INIT_LIST_HEAD(&engine->in_progress);
1720 engine->in_flight = 0;
1721 tasklet_init(&engine->complete, spacc_spacc_complete,
1722 (unsigned long)engine);
1723
1724 platform_set_drvdata(pdev, engine);
1725
1726 ret = -EINVAL;
1727 INIT_LIST_HEAD(&engine->registered_algs);
1728 for (i = 0; i < engine->num_algs; ++i) {
1729 engine->algs[i].engine = engine;
1730 err = crypto_register_alg(&engine->algs[i].alg);
1731 if (!err) {
1732 list_add_tail(&engine->algs[i].entry,
1733 &engine->registered_algs);
1734 ret = 0;
1735 }
1736 if (err)
1737 dev_err(engine->dev, "failed to register alg \"%s\"\n",
1738 engine->algs[i].alg.cra_name);
1739 else
1740 dev_dbg(engine->dev, "registered alg \"%s\"\n",
1741 engine->algs[i].alg.cra_name);
1742 }
1743
1744 INIT_LIST_HEAD(&engine->registered_aeads);
1745 for (i = 0; i < engine->num_aeads; ++i) {
1746 engine->aeads[i].engine = engine;
1747 err = crypto_register_aead(&engine->aeads[i].alg);
1748 if (!err) {
1749 list_add_tail(&engine->aeads[i].entry,
1750 &engine->registered_aeads);
1751 ret = 0;
1752 }
1753 if (err)
1754 dev_err(engine->dev, "failed to register alg \"%s\"\n",
1755 engine->aeads[i].alg.base.cra_name);
1756 else
1757 dev_dbg(engine->dev, "registered alg \"%s\"\n",
1758 engine->aeads[i].alg.base.cra_name);
1759 }
1760
1761 if (!ret)
1762 return 0;
1763
1764 del_timer_sync(&engine->packet_timeout);
1765 device_remove_file(&pdev->dev, &dev_attr_stat_irq_thresh);
1766err_clk_disable:
1767 clk_disable_unprepare(engine->clk);
1768err_clk_put:
1769 clk_put(engine->clk);
1770
1771 return ret;
1772}
1773
1774static int spacc_remove(struct platform_device *pdev)
1775{
1776 struct spacc_aead *aead, *an;
1777 struct spacc_alg *alg, *next;
1778 struct spacc_engine *engine = platform_get_drvdata(pdev);
1779
1780 del_timer_sync(&engine->packet_timeout);
1781 device_remove_file(&pdev->dev, &dev_attr_stat_irq_thresh);
1782
1783 list_for_each_entry_safe(aead, an, &engine->registered_aeads, entry) {
1784 list_del(&aead->entry);
1785 crypto_unregister_aead(&aead->alg);
1786 }
1787
1788 list_for_each_entry_safe(alg, next, &engine->registered_algs, entry) {
1789 list_del(&alg->entry);
1790 crypto_unregister_alg(&alg->alg);
1791 }
1792
1793 clk_disable_unprepare(engine->clk);
1794 clk_put(engine->clk);
1795
1796 return 0;
1797}
1798
1799static struct platform_driver spacc_driver = {
1800 .probe = spacc_probe,
1801 .remove = spacc_remove,
1802 .driver = {
1803 .name = "picochip,spacc",
1804#ifdef CONFIG_PM
1805 .pm = &spacc_pm_ops,
1806#endif /* CONFIG_PM */
1807 .of_match_table = of_match_ptr(spacc_of_id_table),
1808 },
1809};
1810
1811module_platform_driver(spacc_driver);
1812
1813MODULE_LICENSE("GPL");
1814MODULE_AUTHOR("Jamie Iles");