text: /*
   * Cipher algorithms supported by the CESA: DES, 3DES and AES.
   *
   * Author: Boris Brezillon <boris.brezillon@free-electrons.com>
   * Author: Arnaud Ebalard <arno@natisbad.org>
   *
   * This work is based on an initial version written by
   * Sebastian Andrzej Siewior < sebastian at breakpoint dot cc >
   *
   * This program is free software; you can redistribute it and/or modify it
   * under the terms of the GNU General Public License version 2 as published
   * by the Free Software Foundation.
   */
  
  #include <crypto/aes.h>
  #include <crypto/des.h>
  
  #include "cesa.h"
  
  struct mv_cesa_des_ctx {
  	struct mv_cesa_ctx base;
  	u8 key[DES_KEY_SIZE];
  };
  
  struct mv_cesa_des3_ctx {
  	struct mv_cesa_ctx base;
  	u8 key[DES3_EDE_KEY_SIZE];
  };
  
  struct mv_cesa_aes_ctx {
  	struct mv_cesa_ctx base;
  	struct crypto_aes_ctx aes;
  };
  
  struct mv_cesa_ablkcipher_dma_iter {
  	struct mv_cesa_dma_iter base;
  	struct mv_cesa_sg_dma_iter src;
  	struct mv_cesa_sg_dma_iter dst;
  };
  
  static inline void
  mv_cesa_ablkcipher_req_iter_init(struct mv_cesa_ablkcipher_dma_iter *iter,
  				 struct ablkcipher_request *req)
  {
  	mv_cesa_req_dma_iter_init(&iter->base, req->nbytes);
  	mv_cesa_sg_dma_iter_init(&iter->src, req->src, DMA_TO_DEVICE);
  	mv_cesa_sg_dma_iter_init(&iter->dst, req->dst, DMA_FROM_DEVICE);
  }
  
  static inline bool
  mv_cesa_ablkcipher_req_iter_next_op(struct mv_cesa_ablkcipher_dma_iter *iter)
  {
  	iter->src.op_offset = 0;
  	iter->dst.op_offset = 0;
  
  	return mv_cesa_req_dma_iter_next_op(&iter->base);
  }
  
  static inline void
  mv_cesa_ablkcipher_dma_cleanup(struct ablkcipher_request *req)
  {
  	struct mv_cesa_ablkcipher_req *creq = ablkcipher_request_ctx(req);
  
  	if (req->dst != req->src) {
  		dma_unmap_sg(cesa_dev->dev, req->dst, creq->dst_nents,
  			     DMA_FROM_DEVICE);
  		dma_unmap_sg(cesa_dev->dev, req->src, creq->src_nents,
  			     DMA_TO_DEVICE);
  	} else {
  		dma_unmap_sg(cesa_dev->dev, req->src, creq->src_nents,
  			     DMA_BIDIRECTIONAL);
  	}
  	mv_cesa_dma_cleanup(&creq->base);
  }
  
  static inline void mv_cesa_ablkcipher_cleanup(struct ablkcipher_request *req)
  {
  	struct mv_cesa_ablkcipher_req *creq = ablkcipher_request_ctx(req);
  
  	if (mv_cesa_req_get_type(&creq->base) == CESA_DMA_REQ)
  		mv_cesa_ablkcipher_dma_cleanup(req);
  }
  
  static void mv_cesa_ablkcipher_std_step(struct ablkcipher_request *req)
  {
  	struct mv_cesa_ablkcipher_req *creq = ablkcipher_request_ctx(req);
  	struct mv_cesa_ablkcipher_std_req *sreq = &creq->std;
  	struct mv_cesa_engine *engine = creq->base.engine;
  	size_t  len = min_t(size_t, req->nbytes - sreq->offset,
  			    CESA_SA_SRAM_PAYLOAD_SIZE);
  
  	mv_cesa_adjust_op(engine, &sreq->op);
  	memcpy_toio(engine->sram, &sreq->op, sizeof(sreq->op));
  
  	len = sg_pcopy_to_buffer(req->src, creq->src_nents,
  				 engine->sram + CESA_SA_DATA_SRAM_OFFSET,
  				 len, sreq->offset);
  
  	sreq->size = len;
  	mv_cesa_set_crypt_op_len(&sreq->op, len);
  
  	/* FIXME: only update enc_len field */
  	if (!sreq->skip_ctx) {
  		memcpy_toio(engine->sram, &sreq->op, sizeof(sreq->op));
  		sreq->skip_ctx = true;
  	} else {
  		memcpy_toio(engine->sram, &sreq->op, sizeof(sreq->op.desc));
  	}
  
  	mv_cesa_set_int_mask(engine, CESA_SA_INT_ACCEL0_DONE);
  	writel_relaxed(CESA_SA_CFG_PARA_DIS, engine->regs + CESA_SA_CFG);
  	BUG_ON(readl(engine->regs + CESA_SA_CMD) &
  	       CESA_SA_CMD_EN_CESA_SA_ACCL0);
  	writel(CESA_SA_CMD_EN_CESA_SA_ACCL0, engine->regs + CESA_SA_CMD);
  }
  
  static int mv_cesa_ablkcipher_std_process(struct ablkcipher_request *req,
  					  u32 status)
  {
  	struct mv_cesa_ablkcipher_req *creq = ablkcipher_request_ctx(req);
  	struct mv_cesa_ablkcipher_std_req *sreq = &creq->std;
  	struct mv_cesa_engine *engine = creq->base.engine;
  	size_t len;
  
  	len = sg_pcopy_from_buffer(req->dst, creq->dst_nents,
  				   engine->sram + CESA_SA_DATA_SRAM_OFFSET,
  				   sreq->size, sreq->offset);
  
  	sreq->offset += len;
  	if (sreq->offset < req->nbytes)
  		return -EINPROGRESS;
  
  	return 0;
  }
  
  static int mv_cesa_ablkcipher_process(struct crypto_async_request *req,
  				      u32 status)
  {
  	struct ablkcipher_request *ablkreq = ablkcipher_request_cast(req);
  	struct mv_cesa_ablkcipher_req *creq = ablkcipher_request_ctx(ablkreq);
  	struct mv_cesa_req *basereq = &creq->base;
  
  	if (mv_cesa_req_get_type(basereq) == CESA_STD_REQ)
  		return mv_cesa_ablkcipher_std_process(ablkreq, status);
  
  	return mv_cesa_dma_process(basereq, status);
  }
  
  static void mv_cesa_ablkcipher_step(struct crypto_async_request *req)
  {
  	struct ablkcipher_request *ablkreq = ablkcipher_request_cast(req);
  	struct mv_cesa_ablkcipher_req *creq = ablkcipher_request_ctx(ablkreq);
  
  	if (mv_cesa_req_get_type(&creq->base) == CESA_DMA_REQ)
  		mv_cesa_dma_step(&creq->base);
  	else
  		mv_cesa_ablkcipher_std_step(ablkreq);
  }
  
  static inline void
  mv_cesa_ablkcipher_dma_prepare(struct ablkcipher_request *req)
  {
  	struct mv_cesa_ablkcipher_req *creq = ablkcipher_request_ctx(req);
  	struct mv_cesa_req *basereq = &creq->base;
  
  	mv_cesa_dma_prepare(basereq, basereq->engine);
  }
  
  static inline void
  mv_cesa_ablkcipher_std_prepare(struct ablkcipher_request *req)
  {
  	struct mv_cesa_ablkcipher_req *creq = ablkcipher_request_ctx(req);
  	struct mv_cesa_ablkcipher_std_req *sreq = &creq->std;
  
  	sreq->size = 0;
  	sreq->offset = 0;
  }
  
  static inline void mv_cesa_ablkcipher_prepare(struct crypto_async_request *req,
  					      struct mv_cesa_engine *engine)
  {
  	struct ablkcipher_request *ablkreq = ablkcipher_request_cast(req);
  	struct mv_cesa_ablkcipher_req *creq = ablkcipher_request_ctx(ablkreq);
  	creq->base.engine = engine;
  
  	if (mv_cesa_req_get_type(&creq->base) == CESA_DMA_REQ)
  		mv_cesa_ablkcipher_dma_prepare(ablkreq);
  	else
  		mv_cesa_ablkcipher_std_prepare(ablkreq);
  }
  
  static inline void
  mv_cesa_ablkcipher_req_cleanup(struct crypto_async_request *req)
  {
  	struct ablkcipher_request *ablkreq = ablkcipher_request_cast(req);
  
  	mv_cesa_ablkcipher_cleanup(ablkreq);
  }
  
  static void
  mv_cesa_ablkcipher_complete(struct crypto_async_request *req)
  {
  	struct ablkcipher_request *ablkreq = ablkcipher_request_cast(req);
  	struct mv_cesa_ablkcipher_req *creq = ablkcipher_request_ctx(ablkreq);
  	struct mv_cesa_engine *engine = creq->base.engine;
  	unsigned int ivsize;
  
  	atomic_sub(ablkreq->nbytes, &engine->load);
  	ivsize = crypto_ablkcipher_ivsize(crypto_ablkcipher_reqtfm(ablkreq));
  
  	if (mv_cesa_req_get_type(&creq->base) == CESA_DMA_REQ) {
  		struct mv_cesa_req *basereq;
  
  		basereq = &creq->base;
  		memcpy(ablkreq->info, basereq->chain.last->data, ivsize);
  	} else {
  		memcpy_fromio(ablkreq->info,
  			      engine->sram + CESA_SA_CRYPT_IV_SRAM_OFFSET,
  			      ivsize);
  	}
  }
  
  static const struct mv_cesa_req_ops mv_cesa_ablkcipher_req_ops = {
  	.step = mv_cesa_ablkcipher_step,
  	.process = mv_cesa_ablkcipher_process,
  	.cleanup = mv_cesa_ablkcipher_req_cleanup,
  	.complete = mv_cesa_ablkcipher_complete,
  };
  
  static int mv_cesa_ablkcipher_cra_init(struct crypto_tfm *tfm)
  {
  	struct mv_cesa_aes_ctx *ctx = crypto_tfm_ctx(tfm);
  
  	ctx->base.ops = &mv_cesa_ablkcipher_req_ops;
  
  	tfm->crt_ablkcipher.reqsize = sizeof(struct mv_cesa_ablkcipher_req);
  
  	return 0;
  }
  
  static int mv_cesa_aes_setkey(struct crypto_ablkcipher *cipher, const u8 *key,
  			      unsigned int len)
  {
  	struct crypto_tfm *tfm = crypto_ablkcipher_tfm(cipher);
  	struct mv_cesa_aes_ctx *ctx = crypto_tfm_ctx(tfm);
  	int remaining;
  	int offset;
  	int ret;
  	int i;
  
  	ret = crypto_aes_expand_key(&ctx->aes, key, len);
  	if (ret) {
  		crypto_ablkcipher_set_flags(cipher, CRYPTO_TFM_RES_BAD_KEY_LEN);
  		return ret;
  	}
  
  	remaining = (ctx->aes.key_length - 16) / 4;
  	offset = ctx->aes.key_length + 24 - remaining;
  	for (i = 0; i < remaining; i++)
  		ctx->aes.key_dec[4 + i] =
  			cpu_to_le32(ctx->aes.key_enc[offset + i]);
  
  	return 0;
  }
  
  static int mv_cesa_des_setkey(struct crypto_ablkcipher *cipher, const u8 *key,
  			      unsigned int len)
  {
  	struct crypto_tfm *tfm = crypto_ablkcipher_tfm(cipher);
  	struct mv_cesa_des_ctx *ctx = crypto_tfm_ctx(tfm);
  	u32 tmp[DES_EXPKEY_WORDS];
  	int ret;
  
  	if (len != DES_KEY_SIZE) {
  		crypto_ablkcipher_set_flags(cipher, CRYPTO_TFM_RES_BAD_KEY_LEN);
  		return -EINVAL;
  	}
  
  	ret = des_ekey(tmp, key);
  	if (!ret && (tfm->crt_flags & CRYPTO_TFM_REQ_WEAK_KEY)) {
  		tfm->crt_flags |= CRYPTO_TFM_RES_WEAK_KEY;
  		return -EINVAL;
  	}
  
  	memcpy(ctx->key, key, DES_KEY_SIZE);
  
  	return 0;
  }
  
  static int mv_cesa_des3_ede_setkey(struct crypto_ablkcipher *cipher,
  				   const u8 *key, unsigned int len)
  {
  	struct crypto_tfm *tfm = crypto_ablkcipher_tfm(cipher);
  	struct mv_cesa_des_ctx *ctx = crypto_tfm_ctx(tfm);
  
  	if (len != DES3_EDE_KEY_SIZE) {
  		crypto_ablkcipher_set_flags(cipher, CRYPTO_TFM_RES_BAD_KEY_LEN);
  		return -EINVAL;
  	}
  
  	memcpy(ctx->key, key, DES3_EDE_KEY_SIZE);
  
  	return 0;
  }
  
  static int mv_cesa_ablkcipher_dma_req_init(struct ablkcipher_request *req,
  				const struct mv_cesa_op_ctx *op_templ)
  {
  	struct mv_cesa_ablkcipher_req *creq = ablkcipher_request_ctx(req);
  	gfp_t flags = (req->base.flags & CRYPTO_TFM_REQ_MAY_SLEEP) ?
  		      GFP_KERNEL : GFP_ATOMIC;
  	struct mv_cesa_req *basereq = &creq->base;
  	struct mv_cesa_ablkcipher_dma_iter iter;
  	bool skip_ctx = false;
  	int ret;
  	unsigned int ivsize;
  
  	basereq->chain.first = NULL;
  	basereq->chain.last = NULL;
  
  	if (req->src != req->dst) {
  		ret = dma_map_sg(cesa_dev->dev, req->src, creq->src_nents,
  				 DMA_TO_DEVICE);
  		if (!ret)
  			return -ENOMEM;
  
  		ret = dma_map_sg(cesa_dev->dev, req->dst, creq->dst_nents,
  				 DMA_FROM_DEVICE);
  		if (!ret) {
  			ret = -ENOMEM;
  			goto err_unmap_src;
  		}
  	} else {
  		ret = dma_map_sg(cesa_dev->dev, req->src, creq->src_nents,
  				 DMA_BIDIRECTIONAL);
  		if (!ret)
  			return -ENOMEM;
  	}
  
  	mv_cesa_tdma_desc_iter_init(&basereq->chain);
  	mv_cesa_ablkcipher_req_iter_init(&iter, req);
  
  	do {
  		struct mv_cesa_op_ctx *op;
  
  		op = mv_cesa_dma_add_op(&basereq->chain, op_templ, skip_ctx, flags);
  		if (IS_ERR(op)) {
  			ret = PTR_ERR(op);
  			goto err_free_tdma;
  		}
  		skip_ctx = true;
  
  		mv_cesa_set_crypt_op_len(op, iter.base.op_len);
  
  		/* Add input transfers */
  		ret = mv_cesa_dma_add_op_transfers(&basereq->chain, &iter.base,
  						   &iter.src, flags);
  		if (ret)
  			goto err_free_tdma;
  
  		/* Add dummy desc to launch the crypto operation */
  		ret = mv_cesa_dma_add_dummy_launch(&basereq->chain, flags);
  		if (ret)
  			goto err_free_tdma;
  
  		/* Add output transfers */
  		ret = mv_cesa_dma_add_op_transfers(&basereq->chain, &iter.base,
  						   &iter.dst, flags);
  		if (ret)
  			goto err_free_tdma;
  
  	} while (mv_cesa_ablkcipher_req_iter_next_op(&iter));
  
  	/* Add output data for IV */
  	ivsize = crypto_ablkcipher_ivsize(crypto_ablkcipher_reqtfm(req));
  	ret = mv_cesa_dma_add_iv_op(&basereq->chain, CESA_SA_CRYPT_IV_SRAM_OFFSET,
  				    ivsize, CESA_TDMA_SRC_IN_SRAM, flags);
  
  	if (ret)
  		goto err_free_tdma;
  
  	basereq->chain.last->flags |= CESA_TDMA_END_OF_REQ;
  
  	return 0;
  
  err_free_tdma:
  	mv_cesa_dma_cleanup(basereq);
  	if (req->dst != req->src)
  		dma_unmap_sg(cesa_dev->dev, req->dst, creq->dst_nents,
  			     DMA_FROM_DEVICE);
  
  err_unmap_src:
  	dma_unmap_sg(cesa_dev->dev, req->src, creq->src_nents,
  		     req->dst != req->src ? DMA_TO_DEVICE : DMA_BIDIRECTIONAL);
  
  	return ret;
  }
  
  static inline int
  mv_cesa_ablkcipher_std_req_init(struct ablkcipher_request *req,
  				const struct mv_cesa_op_ctx *op_templ)
  {
  	struct mv_cesa_ablkcipher_req *creq = ablkcipher_request_ctx(req);
  	struct mv_cesa_ablkcipher_std_req *sreq = &creq->std;
  	struct mv_cesa_req *basereq = &creq->base;
  
  	sreq->op = *op_templ;
  	sreq->skip_ctx = false;
  	basereq->chain.first = NULL;
  	basereq->chain.last = NULL;
  
  	return 0;
  }
  
  static int mv_cesa_ablkcipher_req_init(struct ablkcipher_request *req,
  				       struct mv_cesa_op_ctx *tmpl)
  {
  	struct mv_cesa_ablkcipher_req *creq = ablkcipher_request_ctx(req);
  	struct crypto_ablkcipher *tfm = crypto_ablkcipher_reqtfm(req);
  	unsigned int blksize = crypto_ablkcipher_blocksize(tfm);
  	int ret;
  
  	if (!IS_ALIGNED(req->nbytes, blksize))
  		return -EINVAL;
  
  	creq->src_nents = sg_nents_for_len(req->src, req->nbytes);
  	if (creq->src_nents < 0) {
  		dev_err(cesa_dev->dev, "Invalid number of src SG");
  		return creq->src_nents;
  	}
  	creq->dst_nents = sg_nents_for_len(req->dst, req->nbytes);
  	if (creq->dst_nents < 0) {
  		dev_err(cesa_dev->dev, "Invalid number of dst SG");
  		return creq->dst_nents;
  	}
  
  	mv_cesa_update_op_cfg(tmpl, CESA_SA_DESC_CFG_OP_CRYPT_ONLY,
  			      CESA_SA_DESC_CFG_OP_MSK);
  
  	if (cesa_dev->caps->has_tdma)
  		ret = mv_cesa_ablkcipher_dma_req_init(req, tmpl);
  	else
  		ret = mv_cesa_ablkcipher_std_req_init(req, tmpl);
  
  	return ret;
  }
  
  static int mv_cesa_ablkcipher_queue_req(struct ablkcipher_request *req,
  					struct mv_cesa_op_ctx *tmpl)
  {
  	int ret;
  	struct mv_cesa_ablkcipher_req *creq = ablkcipher_request_ctx(req);
  	struct mv_cesa_engine *engine;
  
  	ret = mv_cesa_ablkcipher_req_init(req, tmpl);
  	if (ret)
  		return ret;
  
  	engine = mv_cesa_select_engine(req->nbytes);
  	mv_cesa_ablkcipher_prepare(&req->base, engine);
  
  	ret = mv_cesa_queue_req(&req->base, &creq->base);
  
  	if (mv_cesa_req_needs_cleanup(&req->base, ret))
  		mv_cesa_ablkcipher_cleanup(req);
  
  	return ret;
  }
  
  static int mv_cesa_des_op(struct ablkcipher_request *req,
  			  struct mv_cesa_op_ctx *tmpl)
  {
  	struct mv_cesa_des_ctx *ctx = crypto_tfm_ctx(req->base.tfm);
  
  	mv_cesa_update_op_cfg(tmpl, CESA_SA_DESC_CFG_CRYPTM_DES,
  			      CESA_SA_DESC_CFG_CRYPTM_MSK);
  
  	memcpy(tmpl->ctx.blkcipher.key, ctx->key, DES_KEY_SIZE);
  
  	return mv_cesa_ablkcipher_queue_req(req, tmpl);
  }
  
  static int mv_cesa_ecb_des_encrypt(struct ablkcipher_request *req)
  {
  	struct mv_cesa_op_ctx tmpl;
  
  	mv_cesa_set_op_cfg(&tmpl,
  			   CESA_SA_DESC_CFG_CRYPTCM_ECB |
  			   CESA_SA_DESC_CFG_DIR_ENC);
  
  	return mv_cesa_des_op(req, &tmpl);
  }
  
  static int mv_cesa_ecb_des_decrypt(struct ablkcipher_request *req)
  {
  	struct mv_cesa_op_ctx tmpl;
  
  	mv_cesa_set_op_cfg(&tmpl,
  			   CESA_SA_DESC_CFG_CRYPTCM_ECB |
  			   CESA_SA_DESC_CFG_DIR_DEC);
  
  	return mv_cesa_des_op(req, &tmpl);
  }
  
  struct crypto_alg mv_cesa_ecb_des_alg = {
  	.cra_name = "ecb(des)",
  	.cra_driver_name = "mv-ecb-des",
  	.cra_priority = 300,
  	.cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER |
  		     CRYPTO_ALG_KERN_DRIVER_ONLY | CRYPTO_ALG_ASYNC,
  	.cra_blocksize = DES_BLOCK_SIZE,
  	.cra_ctxsize = sizeof(struct mv_cesa_des_ctx),
  	.cra_alignmask = 0,
  	.cra_type = &crypto_ablkcipher_type,
  	.cra_module = THIS_MODULE,
  	.cra_init = mv_cesa_ablkcipher_cra_init,
  	.cra_u = {
  		.ablkcipher = {
  			.min_keysize = DES_KEY_SIZE,
  			.max_keysize = DES_KEY_SIZE,
  			.setkey = mv_cesa_des_setkey,
  			.encrypt = mv_cesa_ecb_des_encrypt,
  			.decrypt = mv_cesa_ecb_des_decrypt,
  		},
  	},
  };
  
  static int mv_cesa_cbc_des_op(struct ablkcipher_request *req,
  			      struct mv_cesa_op_ctx *tmpl)
  {
  	mv_cesa_update_op_cfg(tmpl, CESA_SA_DESC_CFG_CRYPTCM_CBC,
  			      CESA_SA_DESC_CFG_CRYPTCM_MSK);
  
  	memcpy(tmpl->ctx.blkcipher.iv, req->info, DES_BLOCK_SIZE);
  
  	return mv_cesa_des_op(req, tmpl);
  }
  
  static int mv_cesa_cbc_des_encrypt(struct ablkcipher_request *req)
  {
  	struct mv_cesa_op_ctx tmpl;
  
  	mv_cesa_set_op_cfg(&tmpl, CESA_SA_DESC_CFG_DIR_ENC);
  
  	return mv_cesa_cbc_des_op(req, &tmpl);
  }
  
  static int mv_cesa_cbc_des_decrypt(struct ablkcipher_request *req)
  {
  	struct mv_cesa_op_ctx tmpl;
  
  	mv_cesa_set_op_cfg(&tmpl, CESA_SA_DESC_CFG_DIR_DEC);
  
  	return mv_cesa_cbc_des_op(req, &tmpl);
  }
  
  struct crypto_alg mv_cesa_cbc_des_alg = {
  	.cra_name = "cbc(des)",
  	.cra_driver_name = "mv-cbc-des",
  	.cra_priority = 300,
  	.cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER |
  		     CRYPTO_ALG_KERN_DRIVER_ONLY | CRYPTO_ALG_ASYNC,
  	.cra_blocksize = DES_BLOCK_SIZE,
  	.cra_ctxsize = sizeof(struct mv_cesa_des_ctx),
  	.cra_alignmask = 0,
  	.cra_type = &crypto_ablkcipher_type,
  	.cra_module = THIS_MODULE,
  	.cra_init = mv_cesa_ablkcipher_cra_init,
  	.cra_u = {
  		.ablkcipher = {
  			.min_keysize = DES_KEY_SIZE,
  			.max_keysize = DES_KEY_SIZE,
  			.ivsize	     = DES_BLOCK_SIZE,
  			.setkey = mv_cesa_des_setkey,
  			.encrypt = mv_cesa_cbc_des_encrypt,
  			.decrypt = mv_cesa_cbc_des_decrypt,
  		},
  	},
  };
  
  static int mv_cesa_des3_op(struct ablkcipher_request *req,
  			   struct mv_cesa_op_ctx *tmpl)
  {
  	struct mv_cesa_des3_ctx *ctx = crypto_tfm_ctx(req->base.tfm);
  
  	mv_cesa_update_op_cfg(tmpl, CESA_SA_DESC_CFG_CRYPTM_3DES,
  			      CESA_SA_DESC_CFG_CRYPTM_MSK);
  
  	memcpy(tmpl->ctx.blkcipher.key, ctx->key, DES3_EDE_KEY_SIZE);
  
  	return mv_cesa_ablkcipher_queue_req(req, tmpl);
  }
  
  static int mv_cesa_ecb_des3_ede_encrypt(struct ablkcipher_request *req)
  {
  	struct mv_cesa_op_ctx tmpl;
  
  	mv_cesa_set_op_cfg(&tmpl,
  			   CESA_SA_DESC_CFG_CRYPTCM_ECB |
  			   CESA_SA_DESC_CFG_3DES_EDE |
  			   CESA_SA_DESC_CFG_DIR_ENC);
  
  	return mv_cesa_des3_op(req, &tmpl);
  }
  
  static int mv_cesa_ecb_des3_ede_decrypt(struct ablkcipher_request *req)
  {
  	struct mv_cesa_op_ctx tmpl;
  
  	mv_cesa_set_op_cfg(&tmpl,
  			   CESA_SA_DESC_CFG_CRYPTCM_ECB |
  			   CESA_SA_DESC_CFG_3DES_EDE |
  			   CESA_SA_DESC_CFG_DIR_DEC);
  
  	return mv_cesa_des3_op(req, &tmpl);
  }
  
  struct crypto_alg mv_cesa_ecb_des3_ede_alg = {
  	.cra_name = "ecb(des3_ede)",
  	.cra_driver_name = "mv-ecb-des3-ede",
  	.cra_priority = 300,
  	.cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER |
  		     CRYPTO_ALG_KERN_DRIVER_ONLY | CRYPTO_ALG_ASYNC,
  	.cra_blocksize = DES3_EDE_BLOCK_SIZE,
  	.cra_ctxsize = sizeof(struct mv_cesa_des3_ctx),
  	.cra_alignmask = 0,
  	.cra_type = &crypto_ablkcipher_type,
  	.cra_module = THIS_MODULE,
  	.cra_init = mv_cesa_ablkcipher_cra_init,
  	.cra_u = {
  		.ablkcipher = {
  			.min_keysize = DES3_EDE_KEY_SIZE,
  			.max_keysize = DES3_EDE_KEY_SIZE,
  			.ivsize	     = DES3_EDE_BLOCK_SIZE,
  			.setkey = mv_cesa_des3_ede_setkey,
  			.encrypt = mv_cesa_ecb_des3_ede_encrypt,
  			.decrypt = mv_cesa_ecb_des3_ede_decrypt,
  		},
  	},
  };
  
  static int mv_cesa_cbc_des3_op(struct ablkcipher_request *req,
  			       struct mv_cesa_op_ctx *tmpl)
  {
  	memcpy(tmpl->ctx.blkcipher.iv, req->info, DES3_EDE_BLOCK_SIZE);
  
  	return mv_cesa_des3_op(req, tmpl);
  }
  
  static int mv_cesa_cbc_des3_ede_encrypt(struct ablkcipher_request *req)
  {
  	struct mv_cesa_op_ctx tmpl;
  
  	mv_cesa_set_op_cfg(&tmpl,
  			   CESA_SA_DESC_CFG_CRYPTCM_CBC |
  			   CESA_SA_DESC_CFG_3DES_EDE |
  			   CESA_SA_DESC_CFG_DIR_ENC);
  
  	return mv_cesa_cbc_des3_op(req, &tmpl);
  }
  
  static int mv_cesa_cbc_des3_ede_decrypt(struct ablkcipher_request *req)
  {
  	struct mv_cesa_op_ctx tmpl;
  
  	mv_cesa_set_op_cfg(&tmpl,
  			   CESA_SA_DESC_CFG_CRYPTCM_CBC |
  			   CESA_SA_DESC_CFG_3DES_EDE |
  			   CESA_SA_DESC_CFG_DIR_DEC);
  
  	return mv_cesa_cbc_des3_op(req, &tmpl);
  }
  
  struct crypto_alg mv_cesa_cbc_des3_ede_alg = {
  	.cra_name = "cbc(des3_ede)",
  	.cra_driver_name = "mv-cbc-des3-ede",
  	.cra_priority = 300,
  	.cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER |
  		     CRYPTO_ALG_KERN_DRIVER_ONLY | CRYPTO_ALG_ASYNC,
  	.cra_blocksize = DES3_EDE_BLOCK_SIZE,
  	.cra_ctxsize = sizeof(struct mv_cesa_des3_ctx),
  	.cra_alignmask = 0,
  	.cra_type = &crypto_ablkcipher_type,
  	.cra_module = THIS_MODULE,
  	.cra_init = mv_cesa_ablkcipher_cra_init,
  	.cra_u = {
  		.ablkcipher = {
  			.min_keysize = DES3_EDE_KEY_SIZE,
  			.max_keysize = DES3_EDE_KEY_SIZE,
  			.ivsize	     = DES3_EDE_BLOCK_SIZE,
  			.setkey = mv_cesa_des3_ede_setkey,
  			.encrypt = mv_cesa_cbc_des3_ede_encrypt,
  			.decrypt = mv_cesa_cbc_des3_ede_decrypt,
  		},
  	},
  };
  
  static int mv_cesa_aes_op(struct ablkcipher_request *req,
  			  struct mv_cesa_op_ctx *tmpl)
  {
  	struct mv_cesa_aes_ctx *ctx = crypto_tfm_ctx(req->base.tfm);
  	int i;
  	u32 *key;
  	u32 cfg;
  
  	cfg = CESA_SA_DESC_CFG_CRYPTM_AES;
  
  	if (mv_cesa_get_op_cfg(tmpl) & CESA_SA_DESC_CFG_DIR_DEC)
  		key = ctx->aes.key_dec;
  	else
  		key = ctx->aes.key_enc;
  
  	for (i = 0; i < ctx->aes.key_length / sizeof(u32); i++)
  		tmpl->ctx.blkcipher.key[i] = cpu_to_le32(key[i]);
  
  	if (ctx->aes.key_length == 24)
  		cfg |= CESA_SA_DESC_CFG_AES_LEN_192;
  	else if (ctx->aes.key_length == 32)
  		cfg |= CESA_SA_DESC_CFG_AES_LEN_256;
  
  	mv_cesa_update_op_cfg(tmpl, cfg,
  			      CESA_SA_DESC_CFG_CRYPTM_MSK |
  			      CESA_SA_DESC_CFG_AES_LEN_MSK);
  
  	return mv_cesa_ablkcipher_queue_req(req, tmpl);
  }
  
  static int mv_cesa_ecb_aes_encrypt(struct ablkcipher_request *req)
  {
  	struct mv_cesa_op_ctx tmpl;
  
  	mv_cesa_set_op_cfg(&tmpl,
  			   CESA_SA_DESC_CFG_CRYPTCM_ECB |
  			   CESA_SA_DESC_CFG_DIR_ENC);
  
  	return mv_cesa_aes_op(req, &tmpl);
  }
  
  static int mv_cesa_ecb_aes_decrypt(struct ablkcipher_request *req)
  {
  	struct mv_cesa_op_ctx tmpl;
  
  	mv_cesa_set_op_cfg(&tmpl,
  			   CESA_SA_DESC_CFG_CRYPTCM_ECB |
  			   CESA_SA_DESC_CFG_DIR_DEC);
  
  	return mv_cesa_aes_op(req, &tmpl);
  }
  
  struct crypto_alg mv_cesa_ecb_aes_alg = {
  	.cra_name = "ecb(aes)",
  	.cra_driver_name = "mv-ecb-aes",
  	.cra_priority = 300,
  	.cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER |
  		     CRYPTO_ALG_KERN_DRIVER_ONLY | CRYPTO_ALG_ASYNC,
  	.cra_blocksize = AES_BLOCK_SIZE,
  	.cra_ctxsize = sizeof(struct mv_cesa_aes_ctx),
  	.cra_alignmask = 0,
  	.cra_type = &crypto_ablkcipher_type,
  	.cra_module = THIS_MODULE,
  	.cra_init = mv_cesa_ablkcipher_cra_init,
  	.cra_u = {
  		.ablkcipher = {
  			.min_keysize = AES_MIN_KEY_SIZE,
  			.max_keysize = AES_MAX_KEY_SIZE,
  			.setkey = mv_cesa_aes_setkey,
  			.encrypt = mv_cesa_ecb_aes_encrypt,
  			.decrypt = mv_cesa_ecb_aes_decrypt,
  		},
  	},
  };
  
  static int mv_cesa_cbc_aes_op(struct ablkcipher_request *req,
  			      struct mv_cesa_op_ctx *tmpl)
  {
  	mv_cesa_update_op_cfg(tmpl, CESA_SA_DESC_CFG_CRYPTCM_CBC,
  			      CESA_SA_DESC_CFG_CRYPTCM_MSK);
  	memcpy(tmpl->ctx.blkcipher.iv, req->info, AES_BLOCK_SIZE);
  
  	return mv_cesa_aes_op(req, tmpl);
  }
  
  static int mv_cesa_cbc_aes_encrypt(struct ablkcipher_request *req)
  {
  	struct mv_cesa_op_ctx tmpl;
  
  	mv_cesa_set_op_cfg(&tmpl, CESA_SA_DESC_CFG_DIR_ENC);
  
  	return mv_cesa_cbc_aes_op(req, &tmpl);
  }
  
  static int mv_cesa_cbc_aes_decrypt(struct ablkcipher_request *req)
  {
  	struct mv_cesa_op_ctx tmpl;
  
  	mv_cesa_set_op_cfg(&tmpl, CESA_SA_DESC_CFG_DIR_DEC);
  
  	return mv_cesa_cbc_aes_op(req, &tmpl);
  }
  
  struct crypto_alg mv_cesa_cbc_aes_alg = {
  	.cra_name = "cbc(aes)",
  	.cra_driver_name = "mv-cbc-aes",
  	.cra_priority = 300,
  	.cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER |
  		     CRYPTO_ALG_KERN_DRIVER_ONLY | CRYPTO_ALG_ASYNC,
  	.cra_blocksize = AES_BLOCK_SIZE,
  	.cra_ctxsize = sizeof(struct mv_cesa_aes_ctx),
  	.cra_alignmask = 0,
  	.cra_type = &crypto_ablkcipher_type,
  	.cra_module = THIS_MODULE,
  	.cra_init = mv_cesa_ablkcipher_cra_init,
  	.cra_u = {
  		.ablkcipher = {
  			.min_keysize = AES_MIN_KEY_SIZE,
  			.max_keysize = AES_MAX_KEY_SIZE,
  			.ivsize = AES_BLOCK_SIZE,
  			.setkey = mv_cesa_aes_setkey,
  			.encrypt = mv_cesa_cbc_aes_encrypt,
  			.decrypt = mv_cesa_cbc_aes_decrypt,
  		},
  	},
  };
  