2 * Support for Marvell's crypto engine which can be found on some Orion5X
5 * Author: Sebastian Andrzej Siewior < sebastian at breakpoint dot cc >
9 #include <crypto/aes.h>
10 #include <crypto/algapi.h>
11 #include <linux/crypto.h>
12 #include <linux/interrupt.h>
14 #include <linux/kthread.h>
15 #include <linux/platform_device.h>
16 #include <linux/scatterlist.h>
17 #include <linux/slab.h>
18 #include <crypto/internal/hash.h>
19 #include <crypto/sha.h>
23 #define MV_CESA "MV-CESA:"
24 #define MAX_HW_HASH_SIZE 0xFFFF
28 * /---------------------------------------\
29 * | | request complete
31 * IDLE -> new request -> BUSY -> done -> DEQUEUE
33 * | | more scatter entries
43 * struct req_progress - used for every crypt request
44 * @src_sg_it: sg iterator for src
45 * @dst_sg_it: sg iterator for dst
46 * @sg_src_left: bytes left in src to process (scatter list)
47 * @src_start: offset to add to src start position (scatter list)
48 * @crypt_len: length of current hw crypt/hash process
49 * @hw_nbytes: total bytes to process in hw for this request
50 * @copy_back: whether to copy data back (crypt) or not (hash)
51 * @sg_dst_left: bytes left dst to process in this scatter list
52 * @dst_start: offset to add to dst start position (scatter list)
53 * @hw_processed_bytes: number of bytes processed by hw (request).
55 * sg helper are used to iterate over the scatterlist. Since the size of the
56 * SRAM may be less than the scatter size, this struct struct is used to keep
57 * track of progress within current scatterlist.
60 struct sg_mapping_iter src_sg_it;
61 struct sg_mapping_iter dst_sg_it;
62 void (*complete) (void);
63 void (*process) (int is_first);
74 int hw_processed_bytes;
81 struct task_struct *queue_th;
83 /* the lock protects queue and eng_st */
85 struct crypto_queue queue;
86 enum engine_status eng_st;
87 struct crypto_async_request *cur_req;
88 struct req_progress p;
95 static struct crypto_priv *cpg;
98 u8 aes_enc_key[AES_KEY_LEN];
101 u32 need_calc_aes_dkey;
119 struct mv_tfm_hash_ctx {
120 struct crypto_shash *fallback;
121 struct crypto_shash *base_hash;
122 u32 ivs[2 * SHA1_DIGEST_SIZE / 4];
127 struct mv_req_hash_ctx {
129 u32 state[SHA1_DIGEST_SIZE / 4];
130 u8 buffer[SHA1_BLOCK_SIZE];
131 int first_hash; /* marks that we don't have previous state */
132 int last_chunk; /* marks that this is the 'final' request */
133 int extra_bytes; /* unprocessed bytes in buffer */
138 static void compute_aes_dec_key(struct mv_ctx *ctx)
140 struct crypto_aes_ctx gen_aes_key;
143 if (!ctx->need_calc_aes_dkey)
146 crypto_aes_expand_key(&gen_aes_key, ctx->aes_enc_key, ctx->key_len);
148 key_pos = ctx->key_len + 24;
149 memcpy(ctx->aes_dec_key, &gen_aes_key.key_enc[key_pos], 4 * 4);
150 switch (ctx->key_len) {
151 case AES_KEYSIZE_256:
154 case AES_KEYSIZE_192:
156 memcpy(&ctx->aes_dec_key[4], &gen_aes_key.key_enc[key_pos],
160 ctx->need_calc_aes_dkey = 0;
163 static int mv_setkey_aes(struct crypto_ablkcipher *cipher, const u8 *key,
166 struct crypto_tfm *tfm = crypto_ablkcipher_tfm(cipher);
167 struct mv_ctx *ctx = crypto_tfm_ctx(tfm);
170 case AES_KEYSIZE_128:
171 case AES_KEYSIZE_192:
172 case AES_KEYSIZE_256:
175 crypto_ablkcipher_set_flags(cipher, CRYPTO_TFM_RES_BAD_KEY_LEN);
179 ctx->need_calc_aes_dkey = 1;
181 memcpy(ctx->aes_enc_key, key, AES_KEY_LEN);
185 static void copy_src_to_buf(struct req_progress *p, char *dbuf, int len)
192 if (!p->sg_src_left) {
193 ret = sg_miter_next(&p->src_sg_it);
195 p->sg_src_left = p->src_sg_it.length;
199 sbuf = p->src_sg_it.addr + p->src_start;
201 copy_len = min(p->sg_src_left, len);
202 memcpy(dbuf, sbuf, copy_len);
204 p->src_start += copy_len;
205 p->sg_src_left -= copy_len;
212 static void setup_data_in(void)
214 struct req_progress *p = &cpg->p;
216 min(p->hw_nbytes - p->hw_processed_bytes, cpg->max_req_size);
217 copy_src_to_buf(p, cpg->sram + SRAM_DATA_IN_START + p->crypt_len,
218 data_in_sram - p->crypt_len);
219 p->crypt_len = data_in_sram;
222 static void mv_process_current_q(int first_block)
224 struct ablkcipher_request *req = ablkcipher_request_cast(cpg->cur_req);
225 struct mv_ctx *ctx = crypto_tfm_ctx(req->base.tfm);
226 struct mv_req_ctx *req_ctx = ablkcipher_request_ctx(req);
227 struct sec_accel_config op;
229 switch (req_ctx->op) {
231 op.config = CFG_OP_CRYPT_ONLY | CFG_ENCM_AES | CFG_ENC_MODE_ECB;
235 op.config = CFG_OP_CRYPT_ONLY | CFG_ENCM_AES | CFG_ENC_MODE_CBC;
236 op.enc_iv = ENC_IV_POINT(SRAM_DATA_IV) |
237 ENC_IV_BUF_POINT(SRAM_DATA_IV_BUF);
239 memcpy(cpg->sram + SRAM_DATA_IV, req->info, 16);
242 if (req_ctx->decrypt) {
243 op.config |= CFG_DIR_DEC;
244 memcpy(cpg->sram + SRAM_DATA_KEY_P, ctx->aes_dec_key,
247 op.config |= CFG_DIR_ENC;
248 memcpy(cpg->sram + SRAM_DATA_KEY_P, ctx->aes_enc_key,
252 switch (ctx->key_len) {
253 case AES_KEYSIZE_128:
254 op.config |= CFG_AES_LEN_128;
256 case AES_KEYSIZE_192:
257 op.config |= CFG_AES_LEN_192;
259 case AES_KEYSIZE_256:
260 op.config |= CFG_AES_LEN_256;
263 op.enc_p = ENC_P_SRC(SRAM_DATA_IN_START) |
264 ENC_P_DST(SRAM_DATA_OUT_START);
265 op.enc_key_p = SRAM_DATA_KEY_P;
268 op.enc_len = cpg->p.crypt_len;
269 memcpy(cpg->sram + SRAM_CONFIG, &op,
270 sizeof(struct sec_accel_config));
273 writel(SEC_CMD_EN_SEC_ACCL0, cpg->reg + SEC_ACCEL_CMD);
276 * XXX: add timer if the interrupt does not occur for some mystery
281 static void mv_crypto_algo_completion(void)
283 struct ablkcipher_request *req = ablkcipher_request_cast(cpg->cur_req);
284 struct mv_req_ctx *req_ctx = ablkcipher_request_ctx(req);
286 sg_miter_stop(&cpg->p.src_sg_it);
287 sg_miter_stop(&cpg->p.dst_sg_it);
289 if (req_ctx->op != COP_AES_CBC)
292 memcpy(req->info, cpg->sram + SRAM_DATA_IV_BUF, 16);
295 static void mv_process_hash_current(int first_block)
297 struct ahash_request *req = ahash_request_cast(cpg->cur_req);
298 const struct mv_tfm_hash_ctx *tfm_ctx = crypto_tfm_ctx(req->base.tfm);
299 struct mv_req_hash_ctx *req_ctx = ahash_request_ctx(req);
300 struct req_progress *p = &cpg->p;
301 struct sec_accel_config op = { 0 };
304 switch (req_ctx->op) {
307 op.config = CFG_OP_MAC_ONLY | CFG_MACM_SHA1;
310 op.config = CFG_OP_MAC_ONLY | CFG_MACM_HMAC_SHA1;
311 memcpy(cpg->sram + SRAM_HMAC_IV_IN,
312 tfm_ctx->ivs, sizeof(tfm_ctx->ivs));
317 MAC_SRC_DATA_P(SRAM_DATA_IN_START) | MAC_SRC_TOTAL_LEN((u32)
324 MAC_DIGEST_P(SRAM_DIGEST_BUF) | MAC_FRAG_LEN(p->crypt_len);
326 MAC_INNER_IV_P(SRAM_HMAC_IV_IN) |
327 MAC_OUTER_IV_P(SRAM_HMAC_IV_OUT);
329 is_last = req_ctx->last_chunk
330 && (p->hw_processed_bytes + p->crypt_len >= p->hw_nbytes)
331 && (req_ctx->count <= MAX_HW_HASH_SIZE);
332 if (req_ctx->first_hash) {
334 op.config |= CFG_NOT_FRAG;
336 op.config |= CFG_FIRST_FRAG;
338 req_ctx->first_hash = 0;
341 op.config |= CFG_LAST_FRAG;
343 op.config |= CFG_MID_FRAG;
345 writel(req_ctx->state[0], cpg->reg + DIGEST_INITIAL_VAL_A);
346 writel(req_ctx->state[1], cpg->reg + DIGEST_INITIAL_VAL_B);
347 writel(req_ctx->state[2], cpg->reg + DIGEST_INITIAL_VAL_C);
348 writel(req_ctx->state[3], cpg->reg + DIGEST_INITIAL_VAL_D);
349 writel(req_ctx->state[4], cpg->reg + DIGEST_INITIAL_VAL_E);
352 memcpy(cpg->sram + SRAM_CONFIG, &op, sizeof(struct sec_accel_config));
355 writel(SEC_CMD_EN_SEC_ACCL0, cpg->reg + SEC_ACCEL_CMD);
358 * XXX: add timer if the interrupt does not occur for some mystery
363 static inline int mv_hash_import_sha1_ctx(const struct mv_req_hash_ctx *ctx,
364 struct shash_desc *desc)
367 struct sha1_state shash_state;
369 shash_state.count = ctx->count + ctx->count_add;
370 for (i = 0; i < 5; i++)
371 shash_state.state[i] = ctx->state[i];
372 memcpy(shash_state.buffer, ctx->buffer, sizeof(shash_state.buffer));
373 return crypto_shash_import(desc, &shash_state);
376 static int mv_hash_final_fallback(struct ahash_request *req)
378 const struct mv_tfm_hash_ctx *tfm_ctx = crypto_tfm_ctx(req->base.tfm);
379 struct mv_req_hash_ctx *req_ctx = ahash_request_ctx(req);
381 struct shash_desc shash;
382 char ctx[crypto_shash_descsize(tfm_ctx->fallback)];
386 desc.shash.tfm = tfm_ctx->fallback;
387 desc.shash.flags = CRYPTO_TFM_REQ_MAY_SLEEP;
388 if (unlikely(req_ctx->first_hash)) {
389 crypto_shash_init(&desc.shash);
390 crypto_shash_update(&desc.shash, req_ctx->buffer,
391 req_ctx->extra_bytes);
393 /* only SHA1 for now....
395 rc = mv_hash_import_sha1_ctx(req_ctx, &desc.shash);
399 rc = crypto_shash_final(&desc.shash, req->result);
404 static void mv_hash_algo_completion(void)
406 struct ahash_request *req = ahash_request_cast(cpg->cur_req);
407 struct mv_req_hash_ctx *ctx = ahash_request_ctx(req);
409 if (ctx->extra_bytes)
410 copy_src_to_buf(&cpg->p, ctx->buffer, ctx->extra_bytes);
411 sg_miter_stop(&cpg->p.src_sg_it);
413 if (likely(ctx->last_chunk)) {
414 if (likely(ctx->count <= MAX_HW_HASH_SIZE)) {
415 memcpy(req->result, cpg->sram + SRAM_DIGEST_BUF,
416 crypto_ahash_digestsize(crypto_ahash_reqtfm
419 mv_hash_final_fallback(req);
421 ctx->state[0] = readl(cpg->reg + DIGEST_INITIAL_VAL_A);
422 ctx->state[1] = readl(cpg->reg + DIGEST_INITIAL_VAL_B);
423 ctx->state[2] = readl(cpg->reg + DIGEST_INITIAL_VAL_C);
424 ctx->state[3] = readl(cpg->reg + DIGEST_INITIAL_VAL_D);
425 ctx->state[4] = readl(cpg->reg + DIGEST_INITIAL_VAL_E);
429 static void dequeue_complete_req(void)
431 struct crypto_async_request *req = cpg->cur_req;
434 cpg->p.hw_processed_bytes += cpg->p.crypt_len;
435 if (cpg->p.copy_back) {
436 int need_copy_len = cpg->p.crypt_len;
441 if (!cpg->p.sg_dst_left) {
442 ret = sg_miter_next(&cpg->p.dst_sg_it);
444 cpg->p.sg_dst_left = cpg->p.dst_sg_it.length;
445 cpg->p.dst_start = 0;
448 buf = cpg->p.dst_sg_it.addr;
449 buf += cpg->p.dst_start;
451 dst_copy = min(need_copy_len, cpg->p.sg_dst_left);
454 cpg->sram + SRAM_DATA_OUT_START + sram_offset,
456 sram_offset += dst_copy;
457 cpg->p.sg_dst_left -= dst_copy;
458 need_copy_len -= dst_copy;
459 cpg->p.dst_start += dst_copy;
460 } while (need_copy_len > 0);
463 cpg->p.crypt_len = 0;
465 BUG_ON(cpg->eng_st != ENGINE_W_DEQUEUE);
466 if (cpg->p.hw_processed_bytes < cpg->p.hw_nbytes) {
467 /* process next scatter list entry */
468 cpg->eng_st = ENGINE_BUSY;
472 cpg->eng_st = ENGINE_IDLE;
474 req->complete(req, 0);
479 static int count_sgs(struct scatterlist *sl, unsigned int total_bytes)
485 cur_len = sl[i].length;
487 if (total_bytes > cur_len)
488 total_bytes -= cur_len;
496 static void mv_start_new_crypt_req(struct ablkcipher_request *req)
498 struct req_progress *p = &cpg->p;
501 cpg->cur_req = &req->base;
502 memset(p, 0, sizeof(struct req_progress));
503 p->hw_nbytes = req->nbytes;
504 p->complete = mv_crypto_algo_completion;
505 p->process = mv_process_current_q;
508 num_sgs = count_sgs(req->src, req->nbytes);
509 sg_miter_start(&p->src_sg_it, req->src, num_sgs, SG_MITER_FROM_SG);
511 num_sgs = count_sgs(req->dst, req->nbytes);
512 sg_miter_start(&p->dst_sg_it, req->dst, num_sgs, SG_MITER_TO_SG);
514 mv_process_current_q(1);
517 static void mv_start_new_hash_req(struct ahash_request *req)
519 struct req_progress *p = &cpg->p;
520 struct mv_req_hash_ctx *ctx = ahash_request_ctx(req);
521 int num_sgs, hw_bytes, old_extra_bytes, rc;
522 cpg->cur_req = &req->base;
523 memset(p, 0, sizeof(struct req_progress));
524 hw_bytes = req->nbytes + ctx->extra_bytes;
525 old_extra_bytes = ctx->extra_bytes;
527 ctx->extra_bytes = hw_bytes % SHA1_BLOCK_SIZE;
528 if (ctx->extra_bytes != 0
529 && (!ctx->last_chunk || ctx->count > MAX_HW_HASH_SIZE))
530 hw_bytes -= ctx->extra_bytes;
532 ctx->extra_bytes = 0;
534 num_sgs = count_sgs(req->src, req->nbytes);
535 sg_miter_start(&p->src_sg_it, req->src, num_sgs, SG_MITER_FROM_SG);
538 p->hw_nbytes = hw_bytes;
539 p->complete = mv_hash_algo_completion;
540 p->process = mv_process_hash_current;
542 if (unlikely(old_extra_bytes)) {
543 memcpy(cpg->sram + SRAM_DATA_IN_START, ctx->buffer,
545 p->crypt_len = old_extra_bytes;
548 mv_process_hash_current(1);
550 copy_src_to_buf(p, ctx->buffer + old_extra_bytes,
551 ctx->extra_bytes - old_extra_bytes);
552 sg_miter_stop(&p->src_sg_it);
554 rc = mv_hash_final_fallback(req);
557 cpg->eng_st = ENGINE_IDLE;
559 req->base.complete(&req->base, rc);
564 static int queue_manag(void *data)
566 cpg->eng_st = ENGINE_IDLE;
568 struct crypto_async_request *async_req = NULL;
569 struct crypto_async_request *backlog;
571 __set_current_state(TASK_INTERRUPTIBLE);
573 if (cpg->eng_st == ENGINE_W_DEQUEUE)
574 dequeue_complete_req();
576 spin_lock_irq(&cpg->lock);
577 if (cpg->eng_st == ENGINE_IDLE) {
578 backlog = crypto_get_backlog(&cpg->queue);
579 async_req = crypto_dequeue_request(&cpg->queue);
581 BUG_ON(cpg->eng_st != ENGINE_IDLE);
582 cpg->eng_st = ENGINE_BUSY;
585 spin_unlock_irq(&cpg->lock);
588 backlog->complete(backlog, -EINPROGRESS);
593 if (async_req->tfm->__crt_alg->cra_type !=
594 &crypto_ahash_type) {
595 struct ablkcipher_request *req =
596 ablkcipher_request_cast(async_req);
597 mv_start_new_crypt_req(req);
599 struct ahash_request *req =
600 ahash_request_cast(async_req);
601 mv_start_new_hash_req(req);
608 } while (!kthread_should_stop());
612 static int mv_handle_req(struct crypto_async_request *req)
617 spin_lock_irqsave(&cpg->lock, flags);
618 ret = crypto_enqueue_request(&cpg->queue, req);
619 spin_unlock_irqrestore(&cpg->lock, flags);
620 wake_up_process(cpg->queue_th);
624 static int mv_enc_aes_ecb(struct ablkcipher_request *req)
626 struct mv_req_ctx *req_ctx = ablkcipher_request_ctx(req);
628 req_ctx->op = COP_AES_ECB;
629 req_ctx->decrypt = 0;
631 return mv_handle_req(&req->base);
634 static int mv_dec_aes_ecb(struct ablkcipher_request *req)
636 struct mv_ctx *ctx = crypto_tfm_ctx(req->base.tfm);
637 struct mv_req_ctx *req_ctx = ablkcipher_request_ctx(req);
639 req_ctx->op = COP_AES_ECB;
640 req_ctx->decrypt = 1;
642 compute_aes_dec_key(ctx);
643 return mv_handle_req(&req->base);
646 static int mv_enc_aes_cbc(struct ablkcipher_request *req)
648 struct mv_req_ctx *req_ctx = ablkcipher_request_ctx(req);
650 req_ctx->op = COP_AES_CBC;
651 req_ctx->decrypt = 0;
653 return mv_handle_req(&req->base);
656 static int mv_dec_aes_cbc(struct ablkcipher_request *req)
658 struct mv_ctx *ctx = crypto_tfm_ctx(req->base.tfm);
659 struct mv_req_ctx *req_ctx = ablkcipher_request_ctx(req);
661 req_ctx->op = COP_AES_CBC;
662 req_ctx->decrypt = 1;
664 compute_aes_dec_key(ctx);
665 return mv_handle_req(&req->base);
668 static int mv_cra_init(struct crypto_tfm *tfm)
670 tfm->crt_ablkcipher.reqsize = sizeof(struct mv_req_ctx);
674 static void mv_init_hash_req_ctx(struct mv_req_hash_ctx *ctx, int op,
675 int is_last, unsigned int req_len,
678 memset(ctx, 0, sizeof(*ctx));
680 ctx->count = req_len;
682 ctx->last_chunk = is_last;
683 ctx->count_add = count_add;
686 static void mv_update_hash_req_ctx(struct mv_req_hash_ctx *ctx, int is_last,
689 ctx->last_chunk = is_last;
690 ctx->count += req_len;
693 static int mv_hash_init(struct ahash_request *req)
695 const struct mv_tfm_hash_ctx *tfm_ctx = crypto_tfm_ctx(req->base.tfm);
696 mv_init_hash_req_ctx(ahash_request_ctx(req), tfm_ctx->op, 0, 0,
701 static int mv_hash_update(struct ahash_request *req)
706 mv_update_hash_req_ctx(ahash_request_ctx(req), 0, req->nbytes);
707 return mv_handle_req(&req->base);
710 static int mv_hash_final(struct ahash_request *req)
712 struct mv_req_hash_ctx *ctx = ahash_request_ctx(req);
714 mv_update_hash_req_ctx(ctx, 1, 0);
715 return mv_handle_req(&req->base);
718 static int mv_hash_finup(struct ahash_request *req)
720 mv_update_hash_req_ctx(ahash_request_ctx(req), 1, req->nbytes);
721 return mv_handle_req(&req->base);
724 static int mv_hash_digest(struct ahash_request *req)
726 const struct mv_tfm_hash_ctx *tfm_ctx = crypto_tfm_ctx(req->base.tfm);
727 mv_init_hash_req_ctx(ahash_request_ctx(req), tfm_ctx->op, 1,
728 req->nbytes, tfm_ctx->count_add);
729 return mv_handle_req(&req->base);
732 static void mv_hash_init_ivs(struct mv_tfm_hash_ctx *ctx, const void *istate,
735 const struct sha1_state *isha1_state = istate, *osha1_state = ostate;
737 for (i = 0; i < 5; i++) {
738 ctx->ivs[i] = cpu_to_be32(isha1_state->state[i]);
739 ctx->ivs[i + 5] = cpu_to_be32(osha1_state->state[i]);
743 static int mv_hash_setkey(struct crypto_ahash *tfm, const u8 * key,
747 struct mv_tfm_hash_ctx *ctx = crypto_tfm_ctx(&tfm->base);
753 rc = crypto_shash_setkey(ctx->fallback, key, keylen);
757 /* Can't see a way to extract the ipad/opad from the fallback tfm
758 so I'm basically copying code from the hmac module */
759 bs = crypto_shash_blocksize(ctx->base_hash);
760 ds = crypto_shash_digestsize(ctx->base_hash);
761 ss = crypto_shash_statesize(ctx->base_hash);
765 struct shash_desc shash;
766 char ctx[crypto_shash_descsize(ctx->base_hash)];
772 desc.shash.tfm = ctx->base_hash;
773 desc.shash.flags = crypto_shash_get_flags(ctx->base_hash) &
774 CRYPTO_TFM_REQ_MAY_SLEEP;
780 crypto_shash_digest(&desc.shash, key, keylen, ipad);
786 memcpy(ipad, key, keylen);
788 memset(ipad + keylen, 0, bs - keylen);
789 memcpy(opad, ipad, bs);
791 for (i = 0; i < bs; i++) {
796 rc = crypto_shash_init(&desc.shash) ? :
797 crypto_shash_update(&desc.shash, ipad, bs) ? :
798 crypto_shash_export(&desc.shash, ipad) ? :
799 crypto_shash_init(&desc.shash) ? :
800 crypto_shash_update(&desc.shash, opad, bs) ? :
801 crypto_shash_export(&desc.shash, opad);
804 mv_hash_init_ivs(ctx, ipad, opad);
810 static int mv_cra_hash_init(struct crypto_tfm *tfm, const char *base_hash_name,
811 enum hash_op op, int count_add)
813 const char *fallback_driver_name = tfm->__crt_alg->cra_name;
814 struct mv_tfm_hash_ctx *ctx = crypto_tfm_ctx(tfm);
815 struct crypto_shash *fallback_tfm = NULL;
816 struct crypto_shash *base_hash = NULL;
820 ctx->count_add = count_add;
822 /* Allocate a fallback and abort if it failed. */
823 fallback_tfm = crypto_alloc_shash(fallback_driver_name, 0,
824 CRYPTO_ALG_NEED_FALLBACK);
825 if (IS_ERR(fallback_tfm)) {
826 printk(KERN_WARNING MV_CESA
827 "Fallback driver '%s' could not be loaded!\n",
828 fallback_driver_name);
829 err = PTR_ERR(fallback_tfm);
832 ctx->fallback = fallback_tfm;
834 if (base_hash_name) {
835 /* Allocate a hash to compute the ipad/opad of hmac. */
836 base_hash = crypto_alloc_shash(base_hash_name, 0,
837 CRYPTO_ALG_NEED_FALLBACK);
838 if (IS_ERR(base_hash)) {
839 printk(KERN_WARNING MV_CESA
840 "Base driver '%s' could not be loaded!\n",
842 err = PTR_ERR(base_hash);
846 ctx->base_hash = base_hash;
848 crypto_ahash_set_reqsize(__crypto_ahash_cast(tfm),
849 sizeof(struct mv_req_hash_ctx) +
850 crypto_shash_descsize(ctx->fallback));
853 crypto_free_shash(fallback_tfm);
858 static void mv_cra_hash_exit(struct crypto_tfm *tfm)
860 struct mv_tfm_hash_ctx *ctx = crypto_tfm_ctx(tfm);
862 crypto_free_shash(ctx->fallback);
864 crypto_free_shash(ctx->base_hash);
867 static int mv_cra_hash_sha1_init(struct crypto_tfm *tfm)
869 return mv_cra_hash_init(tfm, NULL, COP_SHA1, 0);
872 static int mv_cra_hash_hmac_sha1_init(struct crypto_tfm *tfm)
874 return mv_cra_hash_init(tfm, "sha1", COP_HMAC_SHA1, SHA1_BLOCK_SIZE);
877 irqreturn_t crypto_int(int irq, void *priv)
881 val = readl(cpg->reg + SEC_ACCEL_INT_STATUS);
882 if (!(val & SEC_INT_ACCEL0_DONE))
885 val &= ~SEC_INT_ACCEL0_DONE;
886 writel(val, cpg->reg + FPGA_INT_STATUS);
887 writel(val, cpg->reg + SEC_ACCEL_INT_STATUS);
888 BUG_ON(cpg->eng_st != ENGINE_BUSY);
889 cpg->eng_st = ENGINE_W_DEQUEUE;
890 wake_up_process(cpg->queue_th);
894 struct crypto_alg mv_aes_alg_ecb = {
895 .cra_name = "ecb(aes)",
896 .cra_driver_name = "mv-ecb-aes",
898 .cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER | CRYPTO_ALG_ASYNC,
900 .cra_ctxsize = sizeof(struct mv_ctx),
902 .cra_type = &crypto_ablkcipher_type,
903 .cra_module = THIS_MODULE,
904 .cra_init = mv_cra_init,
907 .min_keysize = AES_MIN_KEY_SIZE,
908 .max_keysize = AES_MAX_KEY_SIZE,
909 .setkey = mv_setkey_aes,
910 .encrypt = mv_enc_aes_ecb,
911 .decrypt = mv_dec_aes_ecb,
916 struct crypto_alg mv_aes_alg_cbc = {
917 .cra_name = "cbc(aes)",
918 .cra_driver_name = "mv-cbc-aes",
920 .cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER | CRYPTO_ALG_ASYNC,
921 .cra_blocksize = AES_BLOCK_SIZE,
922 .cra_ctxsize = sizeof(struct mv_ctx),
924 .cra_type = &crypto_ablkcipher_type,
925 .cra_module = THIS_MODULE,
926 .cra_init = mv_cra_init,
929 .ivsize = AES_BLOCK_SIZE,
930 .min_keysize = AES_MIN_KEY_SIZE,
931 .max_keysize = AES_MAX_KEY_SIZE,
932 .setkey = mv_setkey_aes,
933 .encrypt = mv_enc_aes_cbc,
934 .decrypt = mv_dec_aes_cbc,
939 struct ahash_alg mv_sha1_alg = {
940 .init = mv_hash_init,
941 .update = mv_hash_update,
942 .final = mv_hash_final,
943 .finup = mv_hash_finup,
944 .digest = mv_hash_digest,
946 .digestsize = SHA1_DIGEST_SIZE,
949 .cra_driver_name = "mv-sha1",
952 CRYPTO_ALG_ASYNC | CRYPTO_ALG_NEED_FALLBACK,
953 .cra_blocksize = SHA1_BLOCK_SIZE,
954 .cra_ctxsize = sizeof(struct mv_tfm_hash_ctx),
955 .cra_init = mv_cra_hash_sha1_init,
956 .cra_exit = mv_cra_hash_exit,
957 .cra_module = THIS_MODULE,
962 struct ahash_alg mv_hmac_sha1_alg = {
963 .init = mv_hash_init,
964 .update = mv_hash_update,
965 .final = mv_hash_final,
966 .finup = mv_hash_finup,
967 .digest = mv_hash_digest,
968 .setkey = mv_hash_setkey,
970 .digestsize = SHA1_DIGEST_SIZE,
972 .cra_name = "hmac(sha1)",
973 .cra_driver_name = "mv-hmac-sha1",
976 CRYPTO_ALG_ASYNC | CRYPTO_ALG_NEED_FALLBACK,
977 .cra_blocksize = SHA1_BLOCK_SIZE,
978 .cra_ctxsize = sizeof(struct mv_tfm_hash_ctx),
979 .cra_init = mv_cra_hash_hmac_sha1_init,
980 .cra_exit = mv_cra_hash_exit,
981 .cra_module = THIS_MODULE,
986 static int mv_probe(struct platform_device *pdev)
988 struct crypto_priv *cp;
989 struct resource *res;
994 printk(KERN_ERR MV_CESA "Second crypto dev?\n");
998 res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "regs");
1002 cp = kzalloc(sizeof(*cp), GFP_KERNEL);
1006 spin_lock_init(&cp->lock);
1007 crypto_init_queue(&cp->queue, 50);
1008 cp->reg = ioremap(res->start, resource_size(res));
1014 res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "sram");
1019 cp->sram_size = resource_size(res);
1020 cp->max_req_size = cp->sram_size - SRAM_CFG_SPACE;
1021 cp->sram = ioremap(res->start, cp->sram_size);
1027 irq = platform_get_irq(pdev, 0);
1028 if (irq < 0 || irq == NO_IRQ) {
1030 goto err_unmap_sram;
1034 platform_set_drvdata(pdev, cp);
1037 cp->queue_th = kthread_run(queue_manag, cp, "mv_crypto");
1038 if (IS_ERR(cp->queue_th)) {
1039 ret = PTR_ERR(cp->queue_th);
1040 goto err_unmap_sram;
1043 ret = request_irq(irq, crypto_int, IRQF_DISABLED, dev_name(&pdev->dev),
1048 writel(SEC_INT_ACCEL0_DONE, cpg->reg + SEC_ACCEL_INT_MASK);
1049 writel(SEC_CFG_STOP_DIG_ERR, cpg->reg + SEC_ACCEL_CFG);
1050 writel(SRAM_CONFIG, cpg->reg + SEC_ACCEL_DESC_P0);
1052 ret = crypto_register_alg(&mv_aes_alg_ecb);
1054 printk(KERN_WARNING MV_CESA
1055 "Could not register aes-ecb driver\n");
1059 ret = crypto_register_alg(&mv_aes_alg_cbc);
1061 printk(KERN_WARNING MV_CESA
1062 "Could not register aes-cbc driver\n");
1066 ret = crypto_register_ahash(&mv_sha1_alg);
1070 printk(KERN_WARNING MV_CESA "Could not register sha1 driver\n");
1072 ret = crypto_register_ahash(&mv_hmac_sha1_alg);
1074 cpg->has_hmac_sha1 = 1;
1076 printk(KERN_WARNING MV_CESA
1077 "Could not register hmac-sha1 driver\n");
1082 crypto_unregister_alg(&mv_aes_alg_ecb);
1086 kthread_stop(cp->queue_th);
1094 platform_set_drvdata(pdev, NULL);
1098 static int mv_remove(struct platform_device *pdev)
1100 struct crypto_priv *cp = platform_get_drvdata(pdev);
1102 crypto_unregister_alg(&mv_aes_alg_ecb);
1103 crypto_unregister_alg(&mv_aes_alg_cbc);
1105 crypto_unregister_ahash(&mv_sha1_alg);
1106 if (cp->has_hmac_sha1)
1107 crypto_unregister_ahash(&mv_hmac_sha1_alg);
1108 kthread_stop(cp->queue_th);
1109 free_irq(cp->irq, cp);
1110 memset(cp->sram, 0, cp->sram_size);
1118 static struct platform_driver marvell_crypto = {
1120 .remove = mv_remove,
1122 .owner = THIS_MODULE,
1123 .name = "mv_crypto",
1126 MODULE_ALIAS("platform:mv_crypto");
1128 static int __init mv_crypto_init(void)
1130 return platform_driver_register(&marvell_crypto);
1132 module_init(mv_crypto_init);
1134 static void __exit mv_crypto_exit(void)
1136 platform_driver_unregister(&marvell_crypto);
1138 module_exit(mv_crypto_exit);
1140 MODULE_AUTHOR("Sebastian Andrzej Siewior <sebastian@breakpoint.cc>");
1141 MODULE_DESCRIPTION("Support for Marvell's cryptographic engine");
1142 MODULE_LICENSE("GPL");