1 // SPDX-License-Identifier: GPL-2.0-or-later
3 * Copyright (c) 2010-2011 Picochip Ltd., Jamie Iles
5 #include <crypto/internal/aead.h>
6 #include <crypto/aes.h>
7 #include <crypto/algapi.h>
8 #include <crypto/authenc.h>
9 #include <crypto/internal/des.h>
10 #include <crypto/md5.h>
11 #include <crypto/sha.h>
12 #include <crypto/internal/skcipher.h>
13 #include <linux/clk.h>
14 #include <linux/crypto.h>
15 #include <linux/delay.h>
16 #include <linux/dma-mapping.h>
17 #include <linux/dmapool.h>
18 #include <linux/err.h>
19 #include <linux/init.h>
20 #include <linux/interrupt.h>
22 #include <linux/list.h>
23 #include <linux/module.h>
25 #include <linux/platform_device.h>
27 #include <linux/rtnetlink.h>
28 #include <linux/scatterlist.h>
29 #include <linux/sched.h>
30 #include <linux/sizes.h>
31 #include <linux/slab.h>
32 #include <linux/timer.h>
34 #include "picoxcell_crypto_regs.h"
37 * The threshold for the number of entries in the CMD FIFO available before
38 * the CMD0_CNT interrupt is raised. Increasing this value will reduce the
39 * number of interrupts raised to the CPU.
41 #define CMD0_IRQ_THRESHOLD 1
44 * The timeout period (in jiffies) for a PDU. When the the number of PDUs in
45 * flight is greater than the STAT_IRQ_THRESHOLD or 0 the timer is disabled.
46 * When there are packets in flight but lower than the threshold, we enable
47 * the timer and at expiry, attempt to remove any processed packets from the
48 * queue and if there are still packets left, schedule the timer again.
50 #define PACKET_TIMEOUT 1
52 /* The priority to register each algorithm with. */
53 #define SPACC_CRYPTO_ALG_PRIORITY 10000
55 #define SPACC_CRYPTO_KASUMI_F8_KEY_LEN 16
56 #define SPACC_CRYPTO_IPSEC_CIPHER_PG_SZ 64
57 #define SPACC_CRYPTO_IPSEC_HASH_PG_SZ 64
58 #define SPACC_CRYPTO_IPSEC_MAX_CTXS 32
59 #define SPACC_CRYPTO_IPSEC_FIFO_SZ 32
60 #define SPACC_CRYPTO_L2_CIPHER_PG_SZ 64
61 #define SPACC_CRYPTO_L2_HASH_PG_SZ 64
62 #define SPACC_CRYPTO_L2_MAX_CTXS 128
63 #define SPACC_CRYPTO_L2_FIFO_SZ 128
65 #define MAX_DDT_LEN 16
67 /* DDT format. This must match the hardware DDT format exactly. */
74 * Asynchronous crypto request structure.
76 * This structure defines a request that is either queued for processing or
80 struct list_head list;
81 struct spacc_engine *engine;
82 struct crypto_async_request *req;
86 dma_addr_t src_addr, dst_addr;
87 struct spacc_ddt *src_ddt, *dst_ddt;
88 void (*complete)(struct spacc_req *req);
92 unsigned long ctrl_default;
95 struct spacc_engine *engine;
96 struct list_head entry;
101 struct spacc_engine {
103 struct list_head pending;
107 struct list_head completed;
108 struct list_head in_progress;
109 struct tasklet_struct complete;
110 unsigned long fifo_sz;
111 void __iomem *cipher_ctx_base;
112 void __iomem *hash_key_base;
113 struct spacc_alg *algs;
115 struct list_head registered_algs;
116 struct spacc_aead *aeads;
118 struct list_head registered_aeads;
125 struct timer_list packet_timeout;
126 unsigned stat_irq_thresh;
127 struct dma_pool *req_pool;
130 /* Algorithm type mask. */
131 #define SPACC_CRYPTO_ALG_MASK 0x7
133 /* SPACC definition of a crypto algorithm. */
135 unsigned long ctrl_default;
137 struct skcipher_alg alg;
138 struct spacc_engine *engine;
139 struct list_head entry;
144 /* Generic context structure for any algorithm type. */
145 struct spacc_generic_ctx {
146 struct spacc_engine *engine;
152 /* Block cipher context. */
153 struct spacc_ablk_ctx {
154 struct spacc_generic_ctx generic;
155 u8 key[AES_MAX_KEY_SIZE];
158 * The fallback cipher. If the operation can't be done in hardware,
159 * fallback to a software version.
161 struct crypto_sync_skcipher *sw_cipher;
164 /* AEAD cipher context. */
165 struct spacc_aead_ctx {
166 struct spacc_generic_ctx generic;
167 u8 cipher_key[AES_MAX_KEY_SIZE];
168 u8 hash_ctx[SPACC_CRYPTO_IPSEC_HASH_PG_SZ];
171 struct crypto_aead *sw_cipher;
174 static int spacc_ablk_submit(struct spacc_req *req);
176 static inline struct spacc_alg *to_spacc_skcipher(struct skcipher_alg *alg)
178 return alg ? container_of(alg, struct spacc_alg, alg) : NULL;
181 static inline struct spacc_aead *to_spacc_aead(struct aead_alg *alg)
183 return container_of(alg, struct spacc_aead, alg);
186 static inline int spacc_fifo_cmd_full(struct spacc_engine *engine)
188 u32 fifo_stat = readl(engine->regs + SPA_FIFO_STAT_REG_OFFSET);
190 return fifo_stat & SPA_FIFO_CMD_FULL;
194 * Given a cipher context, and a context number, get the base address of the
197 * Returns the address of the context page where the key/context may
200 static inline void __iomem *spacc_ctx_page_addr(struct spacc_generic_ctx *ctx,
204 return is_cipher_ctx ? ctx->engine->cipher_ctx_base +
205 (indx * ctx->engine->cipher_pg_sz) :
206 ctx->engine->hash_key_base + (indx * ctx->engine->hash_pg_sz);
209 /* The context pages can only be written with 32-bit accesses. */
210 static inline void memcpy_toio32(u32 __iomem *dst, const void *src,
213 const u32 *src32 = (const u32 *) src;
216 writel(*src32++, dst++);
219 static void spacc_cipher_write_ctx(struct spacc_generic_ctx *ctx,
220 void __iomem *page_addr, const u8 *key,
221 size_t key_len, const u8 *iv, size_t iv_len)
223 void __iomem *key_ptr = page_addr + ctx->key_offs;
224 void __iomem *iv_ptr = page_addr + ctx->iv_offs;
226 memcpy_toio32(key_ptr, key, key_len / 4);
227 memcpy_toio32(iv_ptr, iv, iv_len / 4);
231 * Load a context into the engines context memory.
233 * Returns the index of the context page where the context was loaded.
235 static unsigned spacc_load_ctx(struct spacc_generic_ctx *ctx,
236 const u8 *ciph_key, size_t ciph_len,
237 const u8 *iv, size_t ivlen, const u8 *hash_key,
240 unsigned indx = ctx->engine->next_ctx++;
241 void __iomem *ciph_page_addr, *hash_page_addr;
243 ciph_page_addr = spacc_ctx_page_addr(ctx, indx, 1);
244 hash_page_addr = spacc_ctx_page_addr(ctx, indx, 0);
246 ctx->engine->next_ctx &= ctx->engine->fifo_sz - 1;
247 spacc_cipher_write_ctx(ctx, ciph_page_addr, ciph_key, ciph_len, iv,
249 writel(ciph_len | (indx << SPA_KEY_SZ_CTX_INDEX_OFFSET) |
250 (1 << SPA_KEY_SZ_CIPHER_OFFSET),
251 ctx->engine->regs + SPA_KEY_SZ_REG_OFFSET);
254 memcpy_toio32(hash_page_addr, hash_key, hash_len / 4);
255 writel(hash_len | (indx << SPA_KEY_SZ_CTX_INDEX_OFFSET),
256 ctx->engine->regs + SPA_KEY_SZ_REG_OFFSET);
262 static inline void ddt_set(struct spacc_ddt *ddt, dma_addr_t phys, size_t len)
269 * Take a crypto request and scatterlists for the data and turn them into DDTs
270 * for passing to the crypto engines. This also DMA maps the data so that the
271 * crypto engines can DMA to/from them.
273 static struct spacc_ddt *spacc_sg_to_ddt(struct spacc_engine *engine,
274 struct scatterlist *payload,
276 enum dma_data_direction dir,
277 dma_addr_t *ddt_phys)
279 unsigned mapped_ents;
280 struct scatterlist *cur;
281 struct spacc_ddt *ddt;
285 nents = sg_nents_for_len(payload, nbytes);
287 dev_err(engine->dev, "Invalid numbers of SG.\n");
290 mapped_ents = dma_map_sg(engine->dev, payload, nents, dir);
292 if (mapped_ents + 1 > MAX_DDT_LEN)
295 ddt = dma_pool_alloc(engine->req_pool, GFP_ATOMIC, ddt_phys);
299 for_each_sg(payload, cur, mapped_ents, i)
300 ddt_set(&ddt[i], sg_dma_address(cur), sg_dma_len(cur));
301 ddt_set(&ddt[mapped_ents], 0, 0);
306 dma_unmap_sg(engine->dev, payload, nents, dir);
310 static int spacc_aead_make_ddts(struct aead_request *areq)
312 struct crypto_aead *aead = crypto_aead_reqtfm(areq);
313 struct spacc_req *req = aead_request_ctx(areq);
314 struct spacc_engine *engine = req->engine;
315 struct spacc_ddt *src_ddt, *dst_ddt;
317 int src_nents, dst_nents;
318 struct scatterlist *cur;
319 int i, dst_ents, src_ents;
321 total = areq->assoclen + areq->cryptlen;
323 total += crypto_aead_authsize(aead);
325 src_nents = sg_nents_for_len(areq->src, total);
327 dev_err(engine->dev, "Invalid numbers of src SG.\n");
330 if (src_nents + 1 > MAX_DDT_LEN)
334 if (areq->src != areq->dst) {
335 dst_nents = sg_nents_for_len(areq->dst, total);
337 dev_err(engine->dev, "Invalid numbers of dst SG.\n");
340 if (src_nents + 1 > MAX_DDT_LEN)
344 src_ddt = dma_pool_alloc(engine->req_pool, GFP_ATOMIC, &req->src_addr);
348 dst_ddt = dma_pool_alloc(engine->req_pool, GFP_ATOMIC, &req->dst_addr);
352 req->src_ddt = src_ddt;
353 req->dst_ddt = dst_ddt;
356 src_ents = dma_map_sg(engine->dev, areq->src, src_nents,
361 dst_ents = dma_map_sg(engine->dev, areq->dst, dst_nents,
365 dma_unmap_sg(engine->dev, areq->src, src_nents,
370 src_ents = dma_map_sg(engine->dev, areq->src, src_nents,
378 * Now map in the payload for the source and destination and terminate
379 * with the NULL pointers.
381 for_each_sg(areq->src, cur, src_ents, i)
382 ddt_set(src_ddt++, sg_dma_address(cur), sg_dma_len(cur));
384 /* For decryption we need to skip the associated data. */
385 total = req->is_encrypt ? 0 : areq->assoclen;
386 for_each_sg(areq->dst, cur, dst_ents, i) {
387 unsigned len = sg_dma_len(cur);
394 ddt_set(dst_ddt++, sg_dma_address(cur) + total, len - total);
397 ddt_set(src_ddt, 0, 0);
398 ddt_set(dst_ddt, 0, 0);
403 dma_pool_free(engine->req_pool, dst_ddt, req->dst_addr);
405 dma_pool_free(engine->req_pool, src_ddt, req->src_addr);
410 static void spacc_aead_free_ddts(struct spacc_req *req)
412 struct aead_request *areq = container_of(req->req, struct aead_request,
414 struct crypto_aead *aead = crypto_aead_reqtfm(areq);
415 unsigned total = areq->assoclen + areq->cryptlen +
416 (req->is_encrypt ? crypto_aead_authsize(aead) : 0);
417 struct spacc_aead_ctx *aead_ctx = crypto_aead_ctx(aead);
418 struct spacc_engine *engine = aead_ctx->generic.engine;
419 int nents = sg_nents_for_len(areq->src, total);
421 /* sg_nents_for_len should not fail since it works when mapping sg */
422 if (unlikely(nents < 0)) {
423 dev_err(engine->dev, "Invalid numbers of src SG.\n");
427 if (areq->src != areq->dst) {
428 dma_unmap_sg(engine->dev, areq->src, nents, DMA_TO_DEVICE);
429 nents = sg_nents_for_len(areq->dst, total);
430 if (unlikely(nents < 0)) {
431 dev_err(engine->dev, "Invalid numbers of dst SG.\n");
434 dma_unmap_sg(engine->dev, areq->dst, nents, DMA_FROM_DEVICE);
436 dma_unmap_sg(engine->dev, areq->src, nents, DMA_BIDIRECTIONAL);
438 dma_pool_free(engine->req_pool, req->src_ddt, req->src_addr);
439 dma_pool_free(engine->req_pool, req->dst_ddt, req->dst_addr);
442 static void spacc_free_ddt(struct spacc_req *req, struct spacc_ddt *ddt,
443 dma_addr_t ddt_addr, struct scatterlist *payload,
444 unsigned nbytes, enum dma_data_direction dir)
446 int nents = sg_nents_for_len(payload, nbytes);
449 dev_err(req->engine->dev, "Invalid numbers of SG.\n");
453 dma_unmap_sg(req->engine->dev, payload, nents, dir);
454 dma_pool_free(req->engine->req_pool, ddt, ddt_addr);
457 static int spacc_aead_setkey(struct crypto_aead *tfm, const u8 *key,
460 struct spacc_aead_ctx *ctx = crypto_aead_ctx(tfm);
461 struct crypto_authenc_keys keys;
464 crypto_aead_clear_flags(ctx->sw_cipher, CRYPTO_TFM_REQ_MASK);
465 crypto_aead_set_flags(ctx->sw_cipher, crypto_aead_get_flags(tfm) &
466 CRYPTO_TFM_REQ_MASK);
467 err = crypto_aead_setkey(ctx->sw_cipher, key, keylen);
468 crypto_aead_clear_flags(tfm, CRYPTO_TFM_RES_MASK);
469 crypto_aead_set_flags(tfm, crypto_aead_get_flags(ctx->sw_cipher) &
470 CRYPTO_TFM_RES_MASK);
474 if (crypto_authenc_extractkeys(&keys, key, keylen) != 0)
477 if (keys.enckeylen > AES_MAX_KEY_SIZE)
480 if (keys.authkeylen > sizeof(ctx->hash_ctx))
483 memcpy(ctx->cipher_key, keys.enckey, keys.enckeylen);
484 ctx->cipher_key_len = keys.enckeylen;
486 memcpy(ctx->hash_ctx, keys.authkey, keys.authkeylen);
487 ctx->hash_key_len = keys.authkeylen;
489 memzero_explicit(&keys, sizeof(keys));
493 crypto_aead_set_flags(tfm, CRYPTO_TFM_RES_BAD_KEY_LEN);
494 memzero_explicit(&keys, sizeof(keys));
498 static int spacc_aead_setauthsize(struct crypto_aead *tfm,
499 unsigned int authsize)
501 struct spacc_aead_ctx *ctx = crypto_tfm_ctx(crypto_aead_tfm(tfm));
503 return crypto_aead_setauthsize(ctx->sw_cipher, authsize);
507 * Check if an AEAD request requires a fallback operation. Some requests can't
508 * be completed in hardware because the hardware may not support certain key
509 * sizes. In these cases we need to complete the request in software.
511 static int spacc_aead_need_fallback(struct aead_request *aead_req)
513 struct crypto_aead *aead = crypto_aead_reqtfm(aead_req);
514 struct aead_alg *alg = crypto_aead_alg(aead);
515 struct spacc_aead *spacc_alg = to_spacc_aead(alg);
516 struct spacc_aead_ctx *ctx = crypto_aead_ctx(aead);
519 * If we have a non-supported key-length, then we need to do a
522 if ((spacc_alg->ctrl_default & SPACC_CRYPTO_ALG_MASK) ==
523 SPA_CTRL_CIPH_ALG_AES &&
524 ctx->cipher_key_len != AES_KEYSIZE_128 &&
525 ctx->cipher_key_len != AES_KEYSIZE_256)
531 static int spacc_aead_do_fallback(struct aead_request *req, unsigned alg_type,
534 struct crypto_tfm *old_tfm = crypto_aead_tfm(crypto_aead_reqtfm(req));
535 struct spacc_aead_ctx *ctx = crypto_tfm_ctx(old_tfm);
536 struct aead_request *subreq = aead_request_ctx(req);
538 aead_request_set_tfm(subreq, ctx->sw_cipher);
539 aead_request_set_callback(subreq, req->base.flags,
540 req->base.complete, req->base.data);
541 aead_request_set_crypt(subreq, req->src, req->dst, req->cryptlen,
543 aead_request_set_ad(subreq, req->assoclen);
545 return is_encrypt ? crypto_aead_encrypt(subreq) :
546 crypto_aead_decrypt(subreq);
549 static void spacc_aead_complete(struct spacc_req *req)
551 spacc_aead_free_ddts(req);
552 req->req->complete(req->req, req->result);
555 static int spacc_aead_submit(struct spacc_req *req)
557 struct aead_request *aead_req =
558 container_of(req->req, struct aead_request, base);
559 struct crypto_aead *aead = crypto_aead_reqtfm(aead_req);
560 unsigned int authsize = crypto_aead_authsize(aead);
561 struct spacc_aead_ctx *ctx = crypto_aead_ctx(aead);
562 struct aead_alg *alg = crypto_aead_alg(aead);
563 struct spacc_aead *spacc_alg = to_spacc_aead(alg);
564 struct spacc_engine *engine = ctx->generic.engine;
565 u32 ctrl, proc_len, assoc_len;
567 req->result = -EINPROGRESS;
568 req->ctx_id = spacc_load_ctx(&ctx->generic, ctx->cipher_key,
569 ctx->cipher_key_len, aead_req->iv, crypto_aead_ivsize(aead),
570 ctx->hash_ctx, ctx->hash_key_len);
572 /* Set the source and destination DDT pointers. */
573 writel(req->src_addr, engine->regs + SPA_SRC_PTR_REG_OFFSET);
574 writel(req->dst_addr, engine->regs + SPA_DST_PTR_REG_OFFSET);
575 writel(0, engine->regs + SPA_OFFSET_REG_OFFSET);
577 assoc_len = aead_req->assoclen;
578 proc_len = aead_req->cryptlen + assoc_len;
581 * If we are decrypting, we need to take the length of the ICV out of
582 * the processing length.
584 if (!req->is_encrypt)
585 proc_len -= authsize;
587 writel(proc_len, engine->regs + SPA_PROC_LEN_REG_OFFSET);
588 writel(assoc_len, engine->regs + SPA_AAD_LEN_REG_OFFSET);
589 writel(authsize, engine->regs + SPA_ICV_LEN_REG_OFFSET);
590 writel(0, engine->regs + SPA_ICV_OFFSET_REG_OFFSET);
591 writel(0, engine->regs + SPA_AUX_INFO_REG_OFFSET);
593 ctrl = spacc_alg->ctrl_default | (req->ctx_id << SPA_CTRL_CTX_IDX) |
594 (1 << SPA_CTRL_ICV_APPEND);
596 ctrl |= (1 << SPA_CTRL_ENCRYPT_IDX) | (1 << SPA_CTRL_AAD_COPY);
598 ctrl |= (1 << SPA_CTRL_KEY_EXP);
600 mod_timer(&engine->packet_timeout, jiffies + PACKET_TIMEOUT);
602 writel(ctrl, engine->regs + SPA_CTRL_REG_OFFSET);
607 static int spacc_req_submit(struct spacc_req *req);
609 static void spacc_push(struct spacc_engine *engine)
611 struct spacc_req *req;
613 while (!list_empty(&engine->pending) &&
614 engine->in_flight + 1 <= engine->fifo_sz) {
617 req = list_first_entry(&engine->pending, struct spacc_req,
619 list_move_tail(&req->list, &engine->in_progress);
621 req->result = spacc_req_submit(req);
626 * Setup an AEAD request for processing. This will configure the engine, load
627 * the context and then start the packet processing.
629 static int spacc_aead_setup(struct aead_request *req,
630 unsigned alg_type, bool is_encrypt)
632 struct crypto_aead *aead = crypto_aead_reqtfm(req);
633 struct aead_alg *alg = crypto_aead_alg(aead);
634 struct spacc_engine *engine = to_spacc_aead(alg)->engine;
635 struct spacc_req *dev_req = aead_request_ctx(req);
639 dev_req->req = &req->base;
640 dev_req->is_encrypt = is_encrypt;
641 dev_req->result = -EBUSY;
642 dev_req->engine = engine;
643 dev_req->complete = spacc_aead_complete;
645 if (unlikely(spacc_aead_need_fallback(req) ||
646 ((err = spacc_aead_make_ddts(req)) == -E2BIG)))
647 return spacc_aead_do_fallback(req, alg_type, is_encrypt);
653 spin_lock_irqsave(&engine->hw_lock, flags);
654 if (unlikely(spacc_fifo_cmd_full(engine)) ||
655 engine->in_flight + 1 > engine->fifo_sz) {
656 if (!(req->base.flags & CRYPTO_TFM_REQ_MAY_BACKLOG)) {
658 spin_unlock_irqrestore(&engine->hw_lock, flags);
661 list_add_tail(&dev_req->list, &engine->pending);
663 list_add_tail(&dev_req->list, &engine->pending);
666 spin_unlock_irqrestore(&engine->hw_lock, flags);
671 spacc_aead_free_ddts(dev_req);
676 static int spacc_aead_encrypt(struct aead_request *req)
678 struct crypto_aead *aead = crypto_aead_reqtfm(req);
679 struct spacc_aead *alg = to_spacc_aead(crypto_aead_alg(aead));
681 return spacc_aead_setup(req, alg->type, 1);
684 static int spacc_aead_decrypt(struct aead_request *req)
686 struct crypto_aead *aead = crypto_aead_reqtfm(req);
687 struct spacc_aead *alg = to_spacc_aead(crypto_aead_alg(aead));
689 return spacc_aead_setup(req, alg->type, 0);
693 * Initialise a new AEAD context. This is responsible for allocating the
694 * fallback cipher and initialising the context.
696 static int spacc_aead_cra_init(struct crypto_aead *tfm)
698 struct spacc_aead_ctx *ctx = crypto_aead_ctx(tfm);
699 struct aead_alg *alg = crypto_aead_alg(tfm);
700 struct spacc_aead *spacc_alg = to_spacc_aead(alg);
701 struct spacc_engine *engine = spacc_alg->engine;
703 ctx->generic.flags = spacc_alg->type;
704 ctx->generic.engine = engine;
705 ctx->sw_cipher = crypto_alloc_aead(alg->base.cra_name, 0,
706 CRYPTO_ALG_NEED_FALLBACK);
707 if (IS_ERR(ctx->sw_cipher))
708 return PTR_ERR(ctx->sw_cipher);
709 ctx->generic.key_offs = spacc_alg->key_offs;
710 ctx->generic.iv_offs = spacc_alg->iv_offs;
712 crypto_aead_set_reqsize(
714 max(sizeof(struct spacc_req),
715 sizeof(struct aead_request) +
716 crypto_aead_reqsize(ctx->sw_cipher)));
722 * Destructor for an AEAD context. This is called when the transform is freed
723 * and must free the fallback cipher.
725 static void spacc_aead_cra_exit(struct crypto_aead *tfm)
727 struct spacc_aead_ctx *ctx = crypto_aead_ctx(tfm);
729 crypto_free_aead(ctx->sw_cipher);
733 * Set the DES key for a block cipher transform. This also performs weak key
734 * checking if the transform has requested it.
736 static int spacc_des_setkey(struct crypto_skcipher *cipher, const u8 *key,
739 struct spacc_ablk_ctx *ctx = crypto_skcipher_ctx(cipher);
742 err = verify_skcipher_des_key(cipher, key);
746 memcpy(ctx->key, key, len);
753 * Set the 3DES key for a block cipher transform. This also performs weak key
754 * checking if the transform has requested it.
756 static int spacc_des3_setkey(struct crypto_skcipher *cipher, const u8 *key,
759 struct spacc_ablk_ctx *ctx = crypto_skcipher_ctx(cipher);
762 err = verify_skcipher_des3_key(cipher, key);
766 memcpy(ctx->key, key, len);
773 * Set the key for an AES block cipher. Some key lengths are not supported in
774 * hardware so this must also check whether a fallback is needed.
776 static int spacc_aes_setkey(struct crypto_skcipher *cipher, const u8 *key,
779 struct crypto_tfm *tfm = crypto_skcipher_tfm(cipher);
780 struct spacc_ablk_ctx *ctx = crypto_tfm_ctx(tfm);
783 if (len > AES_MAX_KEY_SIZE) {
784 crypto_skcipher_set_flags(cipher, CRYPTO_TFM_RES_BAD_KEY_LEN);
789 * IPSec engine only supports 128 and 256 bit AES keys. If we get a
790 * request for any other size (192 bits) then we need to do a software
793 if (len != AES_KEYSIZE_128 && len != AES_KEYSIZE_256) {
798 * Set the fallback transform to use the same request flags as
799 * the hardware transform.
801 crypto_sync_skcipher_clear_flags(ctx->sw_cipher,
802 CRYPTO_TFM_REQ_MASK);
803 crypto_sync_skcipher_set_flags(ctx->sw_cipher,
804 cipher->base.crt_flags &
805 CRYPTO_TFM_REQ_MASK);
807 err = crypto_sync_skcipher_setkey(ctx->sw_cipher, key, len);
809 tfm->crt_flags &= ~CRYPTO_TFM_RES_MASK;
811 crypto_sync_skcipher_get_flags(ctx->sw_cipher) &
815 goto sw_setkey_failed;
818 memcpy(ctx->key, key, len);
825 static int spacc_kasumi_f8_setkey(struct crypto_skcipher *cipher,
826 const u8 *key, unsigned int len)
828 struct crypto_tfm *tfm = crypto_skcipher_tfm(cipher);
829 struct spacc_ablk_ctx *ctx = crypto_tfm_ctx(tfm);
832 if (len > AES_MAX_KEY_SIZE) {
833 crypto_skcipher_set_flags(cipher, CRYPTO_TFM_RES_BAD_KEY_LEN);
838 memcpy(ctx->key, key, len);
845 static int spacc_ablk_need_fallback(struct spacc_req *req)
847 struct skcipher_request *ablk_req = skcipher_request_cast(req->req);
848 struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(ablk_req);
849 struct spacc_alg *spacc_alg = to_spacc_skcipher(crypto_skcipher_alg(tfm));
850 struct spacc_ablk_ctx *ctx;
852 ctx = crypto_skcipher_ctx(tfm);
854 return (spacc_alg->ctrl_default & SPACC_CRYPTO_ALG_MASK) ==
855 SPA_CTRL_CIPH_ALG_AES &&
856 ctx->key_len != AES_KEYSIZE_128 &&
857 ctx->key_len != AES_KEYSIZE_256;
860 static void spacc_ablk_complete(struct spacc_req *req)
862 struct skcipher_request *ablk_req = skcipher_request_cast(req->req);
864 if (ablk_req->src != ablk_req->dst) {
865 spacc_free_ddt(req, req->src_ddt, req->src_addr, ablk_req->src,
866 ablk_req->cryptlen, DMA_TO_DEVICE);
867 spacc_free_ddt(req, req->dst_ddt, req->dst_addr, ablk_req->dst,
868 ablk_req->cryptlen, DMA_FROM_DEVICE);
870 spacc_free_ddt(req, req->dst_ddt, req->dst_addr, ablk_req->dst,
871 ablk_req->cryptlen, DMA_BIDIRECTIONAL);
873 req->req->complete(req->req, req->result);
876 static int spacc_ablk_submit(struct spacc_req *req)
878 struct skcipher_request *ablk_req = skcipher_request_cast(req->req);
879 struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(ablk_req);
880 struct skcipher_alg *alg = crypto_skcipher_alg(tfm);
881 struct spacc_alg *spacc_alg = to_spacc_skcipher(alg);
882 struct spacc_ablk_ctx *ctx = crypto_skcipher_ctx(tfm);
883 struct spacc_engine *engine = ctx->generic.engine;
886 req->ctx_id = spacc_load_ctx(&ctx->generic, ctx->key,
887 ctx->key_len, ablk_req->iv, alg->ivsize,
890 writel(req->src_addr, engine->regs + SPA_SRC_PTR_REG_OFFSET);
891 writel(req->dst_addr, engine->regs + SPA_DST_PTR_REG_OFFSET);
892 writel(0, engine->regs + SPA_OFFSET_REG_OFFSET);
894 writel(ablk_req->cryptlen, engine->regs + SPA_PROC_LEN_REG_OFFSET);
895 writel(0, engine->regs + SPA_ICV_OFFSET_REG_OFFSET);
896 writel(0, engine->regs + SPA_AUX_INFO_REG_OFFSET);
897 writel(0, engine->regs + SPA_AAD_LEN_REG_OFFSET);
899 ctrl = spacc_alg->ctrl_default | (req->ctx_id << SPA_CTRL_CTX_IDX) |
900 (req->is_encrypt ? (1 << SPA_CTRL_ENCRYPT_IDX) :
901 (1 << SPA_CTRL_KEY_EXP));
903 mod_timer(&engine->packet_timeout, jiffies + PACKET_TIMEOUT);
905 writel(ctrl, engine->regs + SPA_CTRL_REG_OFFSET);
910 static int spacc_ablk_do_fallback(struct skcipher_request *req,
911 unsigned alg_type, bool is_encrypt)
913 struct crypto_tfm *old_tfm =
914 crypto_skcipher_tfm(crypto_skcipher_reqtfm(req));
915 struct spacc_ablk_ctx *ctx = crypto_tfm_ctx(old_tfm);
916 SYNC_SKCIPHER_REQUEST_ON_STACK(subreq, ctx->sw_cipher);
920 * Change the request to use the software fallback transform, and once
921 * the ciphering has completed, put the old transform back into the
924 skcipher_request_set_sync_tfm(subreq, ctx->sw_cipher);
925 skcipher_request_set_callback(subreq, req->base.flags, NULL, NULL);
926 skcipher_request_set_crypt(subreq, req->src, req->dst,
927 req->cryptlen, req->iv);
928 err = is_encrypt ? crypto_skcipher_encrypt(subreq) :
929 crypto_skcipher_decrypt(subreq);
930 skcipher_request_zero(subreq);
935 static int spacc_ablk_setup(struct skcipher_request *req, unsigned alg_type,
938 struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
939 struct skcipher_alg *alg = crypto_skcipher_alg(tfm);
940 struct spacc_engine *engine = to_spacc_skcipher(alg)->engine;
941 struct spacc_req *dev_req = skcipher_request_ctx(req);
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;
951 if (unlikely(spacc_ablk_need_fallback(dev_req)))
952 return spacc_ablk_do_fallback(req, alg_type, is_encrypt);
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.
958 if (req->src != req->dst) {
959 dev_req->src_ddt = spacc_sg_to_ddt(engine, req->src,
960 req->cryptlen, DMA_TO_DEVICE, &dev_req->src_addr);
961 if (!dev_req->src_ddt)
964 dev_req->dst_ddt = spacc_sg_to_ddt(engine, req->dst,
965 req->cryptlen, DMA_FROM_DEVICE, &dev_req->dst_addr);
966 if (!dev_req->dst_ddt)
969 dev_req->dst_ddt = spacc_sg_to_ddt(engine, req->dst,
970 req->cryptlen, DMA_BIDIRECTIONAL, &dev_req->dst_addr);
971 if (!dev_req->dst_ddt)
974 dev_req->src_ddt = NULL;
975 dev_req->src_addr = dev_req->dst_addr;
979 spin_lock_irqsave(&engine->hw_lock, flags);
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.
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)) {
989 spin_unlock_irqrestore(&engine->hw_lock, flags);
992 list_add_tail(&dev_req->list, &engine->pending);
994 list_add_tail(&dev_req->list, &engine->pending);
997 spin_unlock_irqrestore(&engine->hw_lock, flags);
1002 spacc_free_ddt(dev_req, dev_req->dst_ddt, dev_req->dst_addr, req->dst,
1003 req->cryptlen, req->src == req->dst ?
1004 DMA_BIDIRECTIONAL : DMA_FROM_DEVICE);
1006 if (req->src != req->dst)
1007 spacc_free_ddt(dev_req, dev_req->src_ddt, dev_req->src_addr,
1008 req->src, req->cryptlen, DMA_TO_DEVICE);
1013 static int spacc_ablk_init_tfm(struct crypto_skcipher *tfm)
1015 struct spacc_ablk_ctx *ctx = crypto_skcipher_ctx(tfm);
1016 struct skcipher_alg *alg = crypto_skcipher_alg(tfm);
1017 struct spacc_alg *spacc_alg = to_spacc_skcipher(alg);
1018 struct spacc_engine *engine = spacc_alg->engine;
1020 ctx->generic.flags = spacc_alg->type;
1021 ctx->generic.engine = engine;
1022 if (alg->base.cra_flags & CRYPTO_ALG_NEED_FALLBACK) {
1023 ctx->sw_cipher = crypto_alloc_sync_skcipher(
1024 alg->base.cra_name, 0, CRYPTO_ALG_NEED_FALLBACK);
1025 if (IS_ERR(ctx->sw_cipher)) {
1026 dev_warn(engine->dev, "failed to allocate fallback for %s\n",
1027 alg->base.cra_name);
1028 return PTR_ERR(ctx->sw_cipher);
1031 ctx->generic.key_offs = spacc_alg->key_offs;
1032 ctx->generic.iv_offs = spacc_alg->iv_offs;
1034 crypto_skcipher_set_reqsize(tfm, sizeof(struct spacc_req));
1039 static void spacc_ablk_exit_tfm(struct crypto_skcipher *tfm)
1041 struct spacc_ablk_ctx *ctx = crypto_skcipher_ctx(tfm);
1043 crypto_free_sync_skcipher(ctx->sw_cipher);
1046 static int spacc_ablk_encrypt(struct skcipher_request *req)
1048 struct crypto_skcipher *cipher = crypto_skcipher_reqtfm(req);
1049 struct skcipher_alg *alg = crypto_skcipher_alg(cipher);
1050 struct spacc_alg *spacc_alg = to_spacc_skcipher(alg);
1052 return spacc_ablk_setup(req, spacc_alg->type, 1);
1055 static int spacc_ablk_decrypt(struct skcipher_request *req)
1057 struct crypto_skcipher *cipher = crypto_skcipher_reqtfm(req);
1058 struct skcipher_alg *alg = crypto_skcipher_alg(cipher);
1059 struct spacc_alg *spacc_alg = to_spacc_skcipher(alg);
1061 return spacc_ablk_setup(req, spacc_alg->type, 0);
1064 static inline int spacc_fifo_stat_empty(struct spacc_engine *engine)
1066 return readl(engine->regs + SPA_FIFO_STAT_REG_OFFSET) &
1067 SPA_FIFO_STAT_EMPTY;
1070 static void spacc_process_done(struct spacc_engine *engine)
1072 struct spacc_req *req;
1073 unsigned long flags;
1075 spin_lock_irqsave(&engine->hw_lock, flags);
1077 while (!spacc_fifo_stat_empty(engine)) {
1078 req = list_first_entry(&engine->in_progress, struct spacc_req,
1080 list_move_tail(&req->list, &engine->completed);
1081 --engine->in_flight;
1083 /* POP the status register. */
1084 writel(~0, engine->regs + SPA_STAT_POP_REG_OFFSET);
1085 req->result = (readl(engine->regs + SPA_STATUS_REG_OFFSET) &
1086 SPA_STATUS_RES_CODE_MASK) >> SPA_STATUS_RES_CODE_OFFSET;
1089 * Convert the SPAcc error status into the standard POSIX error
1092 if (unlikely(req->result)) {
1093 switch (req->result) {
1094 case SPA_STATUS_ICV_FAIL:
1095 req->result = -EBADMSG;
1098 case SPA_STATUS_MEMORY_ERROR:
1099 dev_warn(engine->dev,
1100 "memory error triggered\n");
1101 req->result = -EFAULT;
1104 case SPA_STATUS_BLOCK_ERROR:
1105 dev_warn(engine->dev,
1106 "block error triggered\n");
1113 tasklet_schedule(&engine->complete);
1115 spin_unlock_irqrestore(&engine->hw_lock, flags);
1118 static irqreturn_t spacc_spacc_irq(int irq, void *dev)
1120 struct spacc_engine *engine = (struct spacc_engine *)dev;
1121 u32 spacc_irq_stat = readl(engine->regs + SPA_IRQ_STAT_REG_OFFSET);
1123 writel(spacc_irq_stat, engine->regs + SPA_IRQ_STAT_REG_OFFSET);
1124 spacc_process_done(engine);
1129 static void spacc_packet_timeout(struct timer_list *t)
1131 struct spacc_engine *engine = from_timer(engine, t, packet_timeout);
1133 spacc_process_done(engine);
1136 static int spacc_req_submit(struct spacc_req *req)
1138 struct crypto_alg *alg = req->req->tfm->__crt_alg;
1140 if (CRYPTO_ALG_TYPE_AEAD == (CRYPTO_ALG_TYPE_MASK & alg->cra_flags))
1141 return spacc_aead_submit(req);
1143 return spacc_ablk_submit(req);
1146 static void spacc_spacc_complete(unsigned long data)
1148 struct spacc_engine *engine = (struct spacc_engine *)data;
1149 struct spacc_req *req, *tmp;
1150 unsigned long flags;
1151 LIST_HEAD(completed);
1153 spin_lock_irqsave(&engine->hw_lock, flags);
1155 list_splice_init(&engine->completed, &completed);
1157 if (engine->in_flight)
1158 mod_timer(&engine->packet_timeout, jiffies + PACKET_TIMEOUT);
1160 spin_unlock_irqrestore(&engine->hw_lock, flags);
1162 list_for_each_entry_safe(req, tmp, &completed, list) {
1163 list_del(&req->list);
1169 static int spacc_suspend(struct device *dev)
1171 struct spacc_engine *engine = dev_get_drvdata(dev);
1174 * We only support standby mode. All we have to do is gate the clock to
1175 * the spacc. The hardware will preserve state until we turn it back
1178 clk_disable(engine->clk);
1183 static int spacc_resume(struct device *dev)
1185 struct spacc_engine *engine = dev_get_drvdata(dev);
1187 return clk_enable(engine->clk);
1190 static const struct dev_pm_ops spacc_pm_ops = {
1191 .suspend = spacc_suspend,
1192 .resume = spacc_resume,
1194 #endif /* CONFIG_PM */
1196 static inline struct spacc_engine *spacc_dev_to_engine(struct device *dev)
1198 return dev ? dev_get_drvdata(dev) : NULL;
1201 static ssize_t spacc_stat_irq_thresh_show(struct device *dev,
1202 struct device_attribute *attr,
1205 struct spacc_engine *engine = spacc_dev_to_engine(dev);
1207 return snprintf(buf, PAGE_SIZE, "%u\n", engine->stat_irq_thresh);
1210 static ssize_t spacc_stat_irq_thresh_store(struct device *dev,
1211 struct device_attribute *attr,
1212 const char *buf, size_t len)
1214 struct spacc_engine *engine = spacc_dev_to_engine(dev);
1215 unsigned long thresh;
1217 if (kstrtoul(buf, 0, &thresh))
1220 thresh = clamp(thresh, 1UL, engine->fifo_sz - 1);
1222 engine->stat_irq_thresh = thresh;
1223 writel(engine->stat_irq_thresh << SPA_IRQ_CTRL_STAT_CNT_OFFSET,
1224 engine->regs + SPA_IRQ_CTRL_REG_OFFSET);
1228 static DEVICE_ATTR(stat_irq_thresh, 0644, spacc_stat_irq_thresh_show,
1229 spacc_stat_irq_thresh_store);
1231 static struct spacc_alg ipsec_engine_algs[] = {
1233 .ctrl_default = SPA_CTRL_CIPH_ALG_AES | SPA_CTRL_CIPH_MODE_CBC,
1235 .iv_offs = AES_MAX_KEY_SIZE,
1237 .base.cra_name = "cbc(aes)",
1238 .base.cra_driver_name = "cbc-aes-picoxcell",
1239 .base.cra_priority = SPACC_CRYPTO_ALG_PRIORITY,
1240 .base.cra_flags = CRYPTO_ALG_KERN_DRIVER_ONLY |
1242 CRYPTO_ALG_NEED_FALLBACK,
1243 .base.cra_blocksize = AES_BLOCK_SIZE,
1244 .base.cra_ctxsize = sizeof(struct spacc_ablk_ctx),
1245 .base.cra_module = THIS_MODULE,
1247 .setkey = spacc_aes_setkey,
1248 .encrypt = spacc_ablk_encrypt,
1249 .decrypt = spacc_ablk_decrypt,
1250 .min_keysize = AES_MIN_KEY_SIZE,
1251 .max_keysize = AES_MAX_KEY_SIZE,
1252 .ivsize = AES_BLOCK_SIZE,
1253 .init = spacc_ablk_init_tfm,
1254 .exit = spacc_ablk_exit_tfm,
1259 .iv_offs = AES_MAX_KEY_SIZE,
1260 .ctrl_default = SPA_CTRL_CIPH_ALG_AES | SPA_CTRL_CIPH_MODE_ECB,
1262 .base.cra_name = "ecb(aes)",
1263 .base.cra_driver_name = "ecb-aes-picoxcell",
1264 .base.cra_priority = SPACC_CRYPTO_ALG_PRIORITY,
1265 .base.cra_flags = CRYPTO_ALG_KERN_DRIVER_ONLY |
1267 CRYPTO_ALG_NEED_FALLBACK,
1268 .base.cra_blocksize = AES_BLOCK_SIZE,
1269 .base.cra_ctxsize = sizeof(struct spacc_ablk_ctx),
1270 .base.cra_module = THIS_MODULE,
1272 .setkey = spacc_aes_setkey,
1273 .encrypt = spacc_ablk_encrypt,
1274 .decrypt = spacc_ablk_decrypt,
1275 .min_keysize = AES_MIN_KEY_SIZE,
1276 .max_keysize = AES_MAX_KEY_SIZE,
1277 .init = spacc_ablk_init_tfm,
1278 .exit = spacc_ablk_exit_tfm,
1282 .key_offs = DES_BLOCK_SIZE,
1284 .ctrl_default = SPA_CTRL_CIPH_ALG_DES | SPA_CTRL_CIPH_MODE_CBC,
1286 .base.cra_name = "cbc(des)",
1287 .base.cra_driver_name = "cbc-des-picoxcell",
1288 .base.cra_priority = SPACC_CRYPTO_ALG_PRIORITY,
1289 .base.cra_flags = CRYPTO_ALG_KERN_DRIVER_ONLY |
1291 .base.cra_blocksize = DES_BLOCK_SIZE,
1292 .base.cra_ctxsize = sizeof(struct spacc_ablk_ctx),
1293 .base.cra_module = THIS_MODULE,
1295 .setkey = spacc_des_setkey,
1296 .encrypt = spacc_ablk_encrypt,
1297 .decrypt = spacc_ablk_decrypt,
1298 .min_keysize = DES_KEY_SIZE,
1299 .max_keysize = DES_KEY_SIZE,
1300 .ivsize = DES_BLOCK_SIZE,
1301 .init = spacc_ablk_init_tfm,
1302 .exit = spacc_ablk_exit_tfm,
1306 .key_offs = DES_BLOCK_SIZE,
1308 .ctrl_default = SPA_CTRL_CIPH_ALG_DES | SPA_CTRL_CIPH_MODE_ECB,
1310 .base.cra_name = "ecb(des)",
1311 .base.cra_driver_name = "ecb-des-picoxcell",
1312 .base.cra_priority = SPACC_CRYPTO_ALG_PRIORITY,
1313 .base.cra_flags = CRYPTO_ALG_KERN_DRIVER_ONLY |
1315 .base.cra_blocksize = DES_BLOCK_SIZE,
1316 .base.cra_ctxsize = sizeof(struct spacc_ablk_ctx),
1317 .base.cra_module = THIS_MODULE,
1319 .setkey = spacc_des_setkey,
1320 .encrypt = spacc_ablk_encrypt,
1321 .decrypt = spacc_ablk_decrypt,
1322 .min_keysize = DES_KEY_SIZE,
1323 .max_keysize = DES_KEY_SIZE,
1324 .init = spacc_ablk_init_tfm,
1325 .exit = spacc_ablk_exit_tfm,
1329 .key_offs = DES_BLOCK_SIZE,
1331 .ctrl_default = SPA_CTRL_CIPH_ALG_DES | SPA_CTRL_CIPH_MODE_CBC,
1333 .base.cra_name = "cbc(des3_ede)",
1334 .base.cra_driver_name = "cbc-des3-ede-picoxcell",
1335 .base.cra_priority = SPACC_CRYPTO_ALG_PRIORITY,
1336 .base.cra_flags = CRYPTO_ALG_ASYNC |
1337 CRYPTO_ALG_KERN_DRIVER_ONLY,
1338 .base.cra_blocksize = DES3_EDE_BLOCK_SIZE,
1339 .base.cra_ctxsize = sizeof(struct spacc_ablk_ctx),
1340 .base.cra_module = THIS_MODULE,
1342 .setkey = spacc_des3_setkey,
1343 .encrypt = spacc_ablk_encrypt,
1344 .decrypt = spacc_ablk_decrypt,
1345 .min_keysize = DES3_EDE_KEY_SIZE,
1346 .max_keysize = DES3_EDE_KEY_SIZE,
1347 .ivsize = DES3_EDE_BLOCK_SIZE,
1348 .init = spacc_ablk_init_tfm,
1349 .exit = spacc_ablk_exit_tfm,
1353 .key_offs = DES_BLOCK_SIZE,
1355 .ctrl_default = SPA_CTRL_CIPH_ALG_DES | SPA_CTRL_CIPH_MODE_ECB,
1357 .base.cra_name = "ecb(des3_ede)",
1358 .base.cra_driver_name = "ecb-des3-ede-picoxcell",
1359 .base.cra_priority = SPACC_CRYPTO_ALG_PRIORITY,
1360 .base.cra_flags = CRYPTO_ALG_ASYNC |
1361 CRYPTO_ALG_KERN_DRIVER_ONLY,
1362 .base.cra_blocksize = DES3_EDE_BLOCK_SIZE,
1363 .base.cra_ctxsize = sizeof(struct spacc_ablk_ctx),
1364 .base.cra_module = THIS_MODULE,
1366 .setkey = spacc_des3_setkey,
1367 .encrypt = spacc_ablk_encrypt,
1368 .decrypt = spacc_ablk_decrypt,
1369 .min_keysize = DES3_EDE_KEY_SIZE,
1370 .max_keysize = DES3_EDE_KEY_SIZE,
1371 .init = spacc_ablk_init_tfm,
1372 .exit = spacc_ablk_exit_tfm,
1377 static struct spacc_aead ipsec_engine_aeads[] = {
1379 .ctrl_default = SPA_CTRL_CIPH_ALG_AES |
1380 SPA_CTRL_CIPH_MODE_CBC |
1381 SPA_CTRL_HASH_ALG_SHA |
1382 SPA_CTRL_HASH_MODE_HMAC,
1384 .iv_offs = AES_MAX_KEY_SIZE,
1387 .cra_name = "authenc(hmac(sha1),cbc(aes))",
1388 .cra_driver_name = "authenc-hmac-sha1-"
1389 "cbc-aes-picoxcell",
1390 .cra_priority = SPACC_CRYPTO_ALG_PRIORITY,
1391 .cra_flags = CRYPTO_ALG_ASYNC |
1392 CRYPTO_ALG_NEED_FALLBACK |
1393 CRYPTO_ALG_KERN_DRIVER_ONLY,
1394 .cra_blocksize = AES_BLOCK_SIZE,
1395 .cra_ctxsize = sizeof(struct spacc_aead_ctx),
1396 .cra_module = THIS_MODULE,
1398 .setkey = spacc_aead_setkey,
1399 .setauthsize = spacc_aead_setauthsize,
1400 .encrypt = spacc_aead_encrypt,
1401 .decrypt = spacc_aead_decrypt,
1402 .ivsize = AES_BLOCK_SIZE,
1403 .maxauthsize = SHA1_DIGEST_SIZE,
1404 .init = spacc_aead_cra_init,
1405 .exit = spacc_aead_cra_exit,
1409 .ctrl_default = SPA_CTRL_CIPH_ALG_AES |
1410 SPA_CTRL_CIPH_MODE_CBC |
1411 SPA_CTRL_HASH_ALG_SHA256 |
1412 SPA_CTRL_HASH_MODE_HMAC,
1414 .iv_offs = AES_MAX_KEY_SIZE,
1417 .cra_name = "authenc(hmac(sha256),cbc(aes))",
1418 .cra_driver_name = "authenc-hmac-sha256-"
1419 "cbc-aes-picoxcell",
1420 .cra_priority = SPACC_CRYPTO_ALG_PRIORITY,
1421 .cra_flags = CRYPTO_ALG_ASYNC |
1422 CRYPTO_ALG_NEED_FALLBACK |
1423 CRYPTO_ALG_KERN_DRIVER_ONLY,
1424 .cra_blocksize = AES_BLOCK_SIZE,
1425 .cra_ctxsize = sizeof(struct spacc_aead_ctx),
1426 .cra_module = THIS_MODULE,
1428 .setkey = spacc_aead_setkey,
1429 .setauthsize = spacc_aead_setauthsize,
1430 .encrypt = spacc_aead_encrypt,
1431 .decrypt = spacc_aead_decrypt,
1432 .ivsize = AES_BLOCK_SIZE,
1433 .maxauthsize = SHA256_DIGEST_SIZE,
1434 .init = spacc_aead_cra_init,
1435 .exit = spacc_aead_cra_exit,
1440 .iv_offs = AES_MAX_KEY_SIZE,
1441 .ctrl_default = SPA_CTRL_CIPH_ALG_AES |
1442 SPA_CTRL_CIPH_MODE_CBC |
1443 SPA_CTRL_HASH_ALG_MD5 |
1444 SPA_CTRL_HASH_MODE_HMAC,
1447 .cra_name = "authenc(hmac(md5),cbc(aes))",
1448 .cra_driver_name = "authenc-hmac-md5-"
1449 "cbc-aes-picoxcell",
1450 .cra_priority = SPACC_CRYPTO_ALG_PRIORITY,
1451 .cra_flags = CRYPTO_ALG_ASYNC |
1452 CRYPTO_ALG_NEED_FALLBACK |
1453 CRYPTO_ALG_KERN_DRIVER_ONLY,
1454 .cra_blocksize = AES_BLOCK_SIZE,
1455 .cra_ctxsize = sizeof(struct spacc_aead_ctx),
1456 .cra_module = THIS_MODULE,
1458 .setkey = spacc_aead_setkey,
1459 .setauthsize = spacc_aead_setauthsize,
1460 .encrypt = spacc_aead_encrypt,
1461 .decrypt = spacc_aead_decrypt,
1462 .ivsize = AES_BLOCK_SIZE,
1463 .maxauthsize = MD5_DIGEST_SIZE,
1464 .init = spacc_aead_cra_init,
1465 .exit = spacc_aead_cra_exit,
1469 .key_offs = DES_BLOCK_SIZE,
1471 .ctrl_default = SPA_CTRL_CIPH_ALG_DES |
1472 SPA_CTRL_CIPH_MODE_CBC |
1473 SPA_CTRL_HASH_ALG_SHA |
1474 SPA_CTRL_HASH_MODE_HMAC,
1477 .cra_name = "authenc(hmac(sha1),cbc(des3_ede))",
1478 .cra_driver_name = "authenc-hmac-sha1-"
1479 "cbc-3des-picoxcell",
1480 .cra_priority = SPACC_CRYPTO_ALG_PRIORITY,
1481 .cra_flags = CRYPTO_ALG_ASYNC |
1482 CRYPTO_ALG_NEED_FALLBACK |
1483 CRYPTO_ALG_KERN_DRIVER_ONLY,
1484 .cra_blocksize = DES3_EDE_BLOCK_SIZE,
1485 .cra_ctxsize = sizeof(struct spacc_aead_ctx),
1486 .cra_module = THIS_MODULE,
1488 .setkey = spacc_aead_setkey,
1489 .setauthsize = spacc_aead_setauthsize,
1490 .encrypt = spacc_aead_encrypt,
1491 .decrypt = spacc_aead_decrypt,
1492 .ivsize = DES3_EDE_BLOCK_SIZE,
1493 .maxauthsize = SHA1_DIGEST_SIZE,
1494 .init = spacc_aead_cra_init,
1495 .exit = spacc_aead_cra_exit,
1499 .key_offs = DES_BLOCK_SIZE,
1501 .ctrl_default = SPA_CTRL_CIPH_ALG_AES |
1502 SPA_CTRL_CIPH_MODE_CBC |
1503 SPA_CTRL_HASH_ALG_SHA256 |
1504 SPA_CTRL_HASH_MODE_HMAC,
1507 .cra_name = "authenc(hmac(sha256),"
1509 .cra_driver_name = "authenc-hmac-sha256-"
1510 "cbc-3des-picoxcell",
1511 .cra_priority = SPACC_CRYPTO_ALG_PRIORITY,
1512 .cra_flags = CRYPTO_ALG_ASYNC |
1513 CRYPTO_ALG_NEED_FALLBACK |
1514 CRYPTO_ALG_KERN_DRIVER_ONLY,
1515 .cra_blocksize = DES3_EDE_BLOCK_SIZE,
1516 .cra_ctxsize = sizeof(struct spacc_aead_ctx),
1517 .cra_module = THIS_MODULE,
1519 .setkey = spacc_aead_setkey,
1520 .setauthsize = spacc_aead_setauthsize,
1521 .encrypt = spacc_aead_encrypt,
1522 .decrypt = spacc_aead_decrypt,
1523 .ivsize = DES3_EDE_BLOCK_SIZE,
1524 .maxauthsize = SHA256_DIGEST_SIZE,
1525 .init = spacc_aead_cra_init,
1526 .exit = spacc_aead_cra_exit,
1530 .key_offs = DES_BLOCK_SIZE,
1532 .ctrl_default = SPA_CTRL_CIPH_ALG_DES |
1533 SPA_CTRL_CIPH_MODE_CBC |
1534 SPA_CTRL_HASH_ALG_MD5 |
1535 SPA_CTRL_HASH_MODE_HMAC,
1538 .cra_name = "authenc(hmac(md5),cbc(des3_ede))",
1539 .cra_driver_name = "authenc-hmac-md5-"
1540 "cbc-3des-picoxcell",
1541 .cra_priority = SPACC_CRYPTO_ALG_PRIORITY,
1542 .cra_flags = CRYPTO_ALG_ASYNC |
1543 CRYPTO_ALG_NEED_FALLBACK |
1544 CRYPTO_ALG_KERN_DRIVER_ONLY,
1545 .cra_blocksize = DES3_EDE_BLOCK_SIZE,
1546 .cra_ctxsize = sizeof(struct spacc_aead_ctx),
1547 .cra_module = THIS_MODULE,
1549 .setkey = spacc_aead_setkey,
1550 .setauthsize = spacc_aead_setauthsize,
1551 .encrypt = spacc_aead_encrypt,
1552 .decrypt = spacc_aead_decrypt,
1553 .ivsize = DES3_EDE_BLOCK_SIZE,
1554 .maxauthsize = MD5_DIGEST_SIZE,
1555 .init = spacc_aead_cra_init,
1556 .exit = spacc_aead_cra_exit,
1561 static struct spacc_alg l2_engine_algs[] = {
1564 .iv_offs = SPACC_CRYPTO_KASUMI_F8_KEY_LEN,
1565 .ctrl_default = SPA_CTRL_CIPH_ALG_KASUMI |
1566 SPA_CTRL_CIPH_MODE_F8,
1568 .base.cra_name = "f8(kasumi)",
1569 .base.cra_driver_name = "f8-kasumi-picoxcell",
1570 .base.cra_priority = SPACC_CRYPTO_ALG_PRIORITY,
1571 .base.cra_flags = CRYPTO_ALG_ASYNC |
1572 CRYPTO_ALG_KERN_DRIVER_ONLY,
1573 .base.cra_blocksize = 8,
1574 .base.cra_ctxsize = sizeof(struct spacc_ablk_ctx),
1575 .base.cra_module = THIS_MODULE,
1577 .setkey = spacc_kasumi_f8_setkey,
1578 .encrypt = spacc_ablk_encrypt,
1579 .decrypt = spacc_ablk_decrypt,
1583 .init = spacc_ablk_init_tfm,
1584 .exit = spacc_ablk_exit_tfm,
1590 static const struct of_device_id spacc_of_id_table[] = {
1591 { .compatible = "picochip,spacc-ipsec" },
1592 { .compatible = "picochip,spacc-l2" },
1595 MODULE_DEVICE_TABLE(of, spacc_of_id_table);
1596 #endif /* CONFIG_OF */
1598 static int spacc_probe(struct platform_device *pdev)
1601 struct resource *irq;
1602 struct device_node *np = pdev->dev.of_node;
1603 struct spacc_engine *engine = devm_kzalloc(&pdev->dev, sizeof(*engine),
1608 if (of_device_is_compatible(np, "picochip,spacc-ipsec")) {
1609 engine->max_ctxs = SPACC_CRYPTO_IPSEC_MAX_CTXS;
1610 engine->cipher_pg_sz = SPACC_CRYPTO_IPSEC_CIPHER_PG_SZ;
1611 engine->hash_pg_sz = SPACC_CRYPTO_IPSEC_HASH_PG_SZ;
1612 engine->fifo_sz = SPACC_CRYPTO_IPSEC_FIFO_SZ;
1613 engine->algs = ipsec_engine_algs;
1614 engine->num_algs = ARRAY_SIZE(ipsec_engine_algs);
1615 engine->aeads = ipsec_engine_aeads;
1616 engine->num_aeads = ARRAY_SIZE(ipsec_engine_aeads);
1617 } else if (of_device_is_compatible(np, "picochip,spacc-l2")) {
1618 engine->max_ctxs = SPACC_CRYPTO_L2_MAX_CTXS;
1619 engine->cipher_pg_sz = SPACC_CRYPTO_L2_CIPHER_PG_SZ;
1620 engine->hash_pg_sz = SPACC_CRYPTO_L2_HASH_PG_SZ;
1621 engine->fifo_sz = SPACC_CRYPTO_L2_FIFO_SZ;
1622 engine->algs = l2_engine_algs;
1623 engine->num_algs = ARRAY_SIZE(l2_engine_algs);
1628 engine->name = dev_name(&pdev->dev);
1630 engine->regs = devm_platform_ioremap_resource(pdev, 0);
1631 if (IS_ERR(engine->regs))
1632 return PTR_ERR(engine->regs);
1634 irq = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
1636 dev_err(&pdev->dev, "no memory/irq resource for engine\n");
1640 if (devm_request_irq(&pdev->dev, irq->start, spacc_spacc_irq, 0,
1641 engine->name, engine)) {
1642 dev_err(engine->dev, "failed to request IRQ\n");
1646 engine->dev = &pdev->dev;
1647 engine->cipher_ctx_base = engine->regs + SPA_CIPH_KEY_BASE_REG_OFFSET;
1648 engine->hash_key_base = engine->regs + SPA_HASH_KEY_BASE_REG_OFFSET;
1650 engine->req_pool = dmam_pool_create(engine->name, engine->dev,
1651 MAX_DDT_LEN * sizeof(struct spacc_ddt), 8, SZ_64K);
1652 if (!engine->req_pool)
1655 spin_lock_init(&engine->hw_lock);
1657 engine->clk = clk_get(&pdev->dev, "ref");
1658 if (IS_ERR(engine->clk)) {
1659 dev_info(&pdev->dev, "clk unavailable\n");
1660 return PTR_ERR(engine->clk);
1663 if (clk_prepare_enable(engine->clk)) {
1664 dev_info(&pdev->dev, "unable to prepare/enable clk\n");
1669 ret = device_create_file(&pdev->dev, &dev_attr_stat_irq_thresh);
1671 goto err_clk_disable;
1675 * Use an IRQ threshold of 50% as a default. This seems to be a
1676 * reasonable trade off of latency against throughput but can be
1677 * changed at runtime.
1679 engine->stat_irq_thresh = (engine->fifo_sz / 2);
1682 * Configure the interrupts. We only use the STAT_CNT interrupt as we
1683 * only submit a new packet for processing when we complete another in
1684 * the queue. This minimizes time spent in the interrupt handler.
1686 writel(engine->stat_irq_thresh << SPA_IRQ_CTRL_STAT_CNT_OFFSET,
1687 engine->regs + SPA_IRQ_CTRL_REG_OFFSET);
1688 writel(SPA_IRQ_EN_STAT_EN | SPA_IRQ_EN_GLBL_EN,
1689 engine->regs + SPA_IRQ_EN_REG_OFFSET);
1691 timer_setup(&engine->packet_timeout, spacc_packet_timeout, 0);
1693 INIT_LIST_HEAD(&engine->pending);
1694 INIT_LIST_HEAD(&engine->completed);
1695 INIT_LIST_HEAD(&engine->in_progress);
1696 engine->in_flight = 0;
1697 tasklet_init(&engine->complete, spacc_spacc_complete,
1698 (unsigned long)engine);
1700 platform_set_drvdata(pdev, engine);
1703 INIT_LIST_HEAD(&engine->registered_algs);
1704 for (i = 0; i < engine->num_algs; ++i) {
1705 engine->algs[i].engine = engine;
1706 err = crypto_register_skcipher(&engine->algs[i].alg);
1708 list_add_tail(&engine->algs[i].entry,
1709 &engine->registered_algs);
1713 dev_err(engine->dev, "failed to register alg \"%s\"\n",
1714 engine->algs[i].alg.base.cra_name);
1716 dev_dbg(engine->dev, "registered alg \"%s\"\n",
1717 engine->algs[i].alg.base.cra_name);
1720 INIT_LIST_HEAD(&engine->registered_aeads);
1721 for (i = 0; i < engine->num_aeads; ++i) {
1722 engine->aeads[i].engine = engine;
1723 err = crypto_register_aead(&engine->aeads[i].alg);
1725 list_add_tail(&engine->aeads[i].entry,
1726 &engine->registered_aeads);
1730 dev_err(engine->dev, "failed to register alg \"%s\"\n",
1731 engine->aeads[i].alg.base.cra_name);
1733 dev_dbg(engine->dev, "registered alg \"%s\"\n",
1734 engine->aeads[i].alg.base.cra_name);
1740 del_timer_sync(&engine->packet_timeout);
1741 device_remove_file(&pdev->dev, &dev_attr_stat_irq_thresh);
1743 clk_disable_unprepare(engine->clk);
1745 clk_put(engine->clk);
1750 static int spacc_remove(struct platform_device *pdev)
1752 struct spacc_aead *aead, *an;
1753 struct spacc_alg *alg, *next;
1754 struct spacc_engine *engine = platform_get_drvdata(pdev);
1756 del_timer_sync(&engine->packet_timeout);
1757 device_remove_file(&pdev->dev, &dev_attr_stat_irq_thresh);
1759 list_for_each_entry_safe(aead, an, &engine->registered_aeads, entry) {
1760 list_del(&aead->entry);
1761 crypto_unregister_aead(&aead->alg);
1764 list_for_each_entry_safe(alg, next, &engine->registered_algs, entry) {
1765 list_del(&alg->entry);
1766 crypto_unregister_skcipher(&alg->alg);
1769 clk_disable_unprepare(engine->clk);
1770 clk_put(engine->clk);
1775 static struct platform_driver spacc_driver = {
1776 .probe = spacc_probe,
1777 .remove = spacc_remove,
1779 .name = "picochip,spacc",
1781 .pm = &spacc_pm_ops,
1782 #endif /* CONFIG_PM */
1783 .of_match_table = of_match_ptr(spacc_of_id_table),
1787 module_platform_driver(spacc_driver);
1789 MODULE_LICENSE("GPL");
1790 MODULE_AUTHOR("Jamie Iles");