text: // SPDX-License-Identifier: GPL-2.0-only
  /*
   * Intel IXP4xx NPE-C crypto driver
   *
   * Copyright (C) 2008 Christian Hohnstaedt <chohnstaedt@innominate.com>
   */
  
  #include <linux/platform_device.h>
  #include <linux/dma-mapping.h>
  #include <linux/dmapool.h>
  #include <linux/crypto.h>
  #include <linux/kernel.h>
  #include <linux/rtnetlink.h>
  #include <linux/interrupt.h>
  #include <linux/spinlock.h>
  #include <linux/gfp.h>
  #include <linux/module.h>
  
  #include <crypto/ctr.h>
  #include <crypto/internal/des.h>
  #include <crypto/aes.h>
  #include <crypto/hmac.h>
  #include <crypto/sha1.h>
  #include <crypto/algapi.h>
  #include <crypto/internal/aead.h>
  #include <crypto/internal/skcipher.h>
  #include <crypto/authenc.h>
  #include <crypto/scatterwalk.h>
  
  #include <linux/soc/ixp4xx/npe.h>
  #include <linux/soc/ixp4xx/qmgr.h>
  
  #define MAX_KEYLEN 32
  
  /* hash: cfgword + 2 * digestlen; crypt: keylen + cfgword */
  #define NPE_CTX_LEN 80
  #define AES_BLOCK128 16
  
  #define NPE_OP_HASH_VERIFY   0x01
  #define NPE_OP_CCM_ENABLE    0x04
  #define NPE_OP_CRYPT_ENABLE  0x08
  #define NPE_OP_HASH_ENABLE   0x10
  #define NPE_OP_NOT_IN_PLACE  0x20
  #define NPE_OP_HMAC_DISABLE  0x40
  #define NPE_OP_CRYPT_ENCRYPT 0x80
  
  #define NPE_OP_CCM_GEN_MIC   0xcc
  #define NPE_OP_HASH_GEN_ICV  0x50
  #define NPE_OP_ENC_GEN_KEY   0xc9
  
  #define MOD_ECB     0x0000
  #define MOD_CTR     0x1000
  #define MOD_CBC_ENC 0x2000
  #define MOD_CBC_DEC 0x3000
  #define MOD_CCM_ENC 0x4000
  #define MOD_CCM_DEC 0x5000
  
  #define KEYLEN_128  4
  #define KEYLEN_192  6
  #define KEYLEN_256  8
  
  #define CIPH_DECR   0x0000
  #define CIPH_ENCR   0x0400
  
  #define MOD_DES     0x0000
  #define MOD_TDEA2   0x0100
  #define MOD_3DES   0x0200
  #define MOD_AES     0x0800
  #define MOD_AES128  (0x0800 | KEYLEN_128)
  #define MOD_AES192  (0x0900 | KEYLEN_192)
  #define MOD_AES256  (0x0a00 | KEYLEN_256)
  
  #define MAX_IVLEN   16
  #define NPE_ID      2  /* NPE C */
  #define NPE_QLEN    16
  /* Space for registering when the first
   * NPE_QLEN crypt_ctl are busy */
  #define NPE_QLEN_TOTAL 64
  
  #define SEND_QID    29
  #define RECV_QID    30
  
  #define CTL_FLAG_UNUSED		0x0000
  #define CTL_FLAG_USED		0x1000
  #define CTL_FLAG_PERFORM_ABLK	0x0001
  #define CTL_FLAG_GEN_ICV	0x0002
  #define CTL_FLAG_GEN_REVAES	0x0004
  #define CTL_FLAG_PERFORM_AEAD	0x0008
  #define CTL_FLAG_MASK		0x000f
  
  #define HMAC_PAD_BLOCKLEN SHA1_BLOCK_SIZE
  
  #define MD5_DIGEST_SIZE   16
  
  struct buffer_desc {
  	u32 phys_next;
  #ifdef __ARMEB__
  	u16 buf_len;
  	u16 pkt_len;
  #else
  	u16 pkt_len;
  	u16 buf_len;
  #endif
  	dma_addr_t phys_addr;
  	u32 __reserved[4];
  	struct buffer_desc *next;
  	enum dma_data_direction dir;
  };
  
  struct crypt_ctl {
  #ifdef __ARMEB__
  	u8 mode;		/* NPE_OP_*  operation mode */
  	u8 init_len;
  	u16 reserved;
  #else
  	u16 reserved;
  	u8 init_len;
  	u8 mode;		/* NPE_OP_*  operation mode */
  #endif
  	u8 iv[MAX_IVLEN];	/* IV for CBC mode or CTR IV for CTR mode */
  	dma_addr_t icv_rev_aes;	/* icv or rev aes */
  	dma_addr_t src_buf;
  	dma_addr_t dst_buf;
  #ifdef __ARMEB__
  	u16 auth_offs;		/* Authentication start offset */
  	u16 auth_len;		/* Authentication data length */
  	u16 crypt_offs;		/* Cryption start offset */
  	u16 crypt_len;		/* Cryption data length */
  #else
  	u16 auth_len;		/* Authentication data length */
  	u16 auth_offs;		/* Authentication start offset */
  	u16 crypt_len;		/* Cryption data length */
  	u16 crypt_offs;		/* Cryption start offset */
  #endif
  	u32 aadAddr;		/* Additional Auth Data Addr for CCM mode */
  	u32 crypto_ctx;		/* NPE Crypto Param structure address */
  
  	/* Used by Host: 4*4 bytes*/
  	unsigned ctl_flags;
  	union {
  		struct skcipher_request *ablk_req;
  		struct aead_request *aead_req;
  		struct crypto_tfm *tfm;
  	} data;
  	struct buffer_desc *regist_buf;
  	u8 *regist_ptr;
  };
  
  struct ablk_ctx {
  	struct buffer_desc *src;
  	struct buffer_desc *dst;
  };
  
  struct aead_ctx {
  	struct buffer_desc *src;
  	struct buffer_desc *dst;
  	struct scatterlist ivlist;
  	/* used when the hmac is not on one sg entry */
  	u8 *hmac_virt;
  	int encrypt;
  };
  
  struct ix_hash_algo {
  	u32 cfgword;
  	unsigned char *icv;
  };
  
  struct ix_sa_dir {
  	unsigned char *npe_ctx;
  	dma_addr_t npe_ctx_phys;
  	int npe_ctx_idx;
  	u8 npe_mode;
  };
  
  struct ixp_ctx {
  	struct ix_sa_dir encrypt;
  	struct ix_sa_dir decrypt;
  	int authkey_len;
  	u8 authkey[MAX_KEYLEN];
  	int enckey_len;
  	u8 enckey[MAX_KEYLEN];
  	u8 salt[MAX_IVLEN];
  	u8 nonce[CTR_RFC3686_NONCE_SIZE];
  	unsigned salted;
  	atomic_t configuring;
  	struct completion completion;
  };
  
  struct ixp_alg {
  	struct skcipher_alg crypto;
  	const struct ix_hash_algo *hash;
  	u32 cfg_enc;
  	u32 cfg_dec;
  
  	int registered;
  };
  
  struct ixp_aead_alg {
  	struct aead_alg crypto;
  	const struct ix_hash_algo *hash;
  	u32 cfg_enc;
  	u32 cfg_dec;
  
  	int registered;
  };
  
  static const struct ix_hash_algo hash_alg_md5 = {
  	.cfgword	= 0xAA010004,
  	.icv		= "\x01\x23\x45\x67\x89\xAB\xCD\xEF"
  			  "\xFE\xDC\xBA\x98\x76\x54\x32\x10",
  };
  static const struct ix_hash_algo hash_alg_sha1 = {
  	.cfgword	= 0x00000005,
  	.icv		= "\x67\x45\x23\x01\xEF\xCD\xAB\x89\x98\xBA"
  			  "\xDC\xFE\x10\x32\x54\x76\xC3\xD2\xE1\xF0",
  };
  
  static struct npe *npe_c;
  static struct dma_pool *buffer_pool = NULL;
  static struct dma_pool *ctx_pool = NULL;
  
  static struct crypt_ctl *crypt_virt = NULL;
  static dma_addr_t crypt_phys;
  
  static int support_aes = 1;
  
  #define DRIVER_NAME "ixp4xx_crypto"
  
  static struct platform_device *pdev;
  
  static inline dma_addr_t crypt_virt2phys(struct crypt_ctl *virt)
  {
  	return crypt_phys + (virt - crypt_virt) * sizeof(struct crypt_ctl);
  }
  
  static inline struct crypt_ctl *crypt_phys2virt(dma_addr_t phys)
  {
  	return crypt_virt + (phys - crypt_phys) / sizeof(struct crypt_ctl);
  }
  
  static inline u32 cipher_cfg_enc(struct crypto_tfm *tfm)
  {
  	return container_of(tfm->__crt_alg, struct ixp_alg,crypto.base)->cfg_enc;
  }
  
  static inline u32 cipher_cfg_dec(struct crypto_tfm *tfm)
  {
  	return container_of(tfm->__crt_alg, struct ixp_alg,crypto.base)->cfg_dec;
  }
  
  static inline const struct ix_hash_algo *ix_hash(struct crypto_tfm *tfm)
  {
  	return container_of(tfm->__crt_alg, struct ixp_alg, crypto.base)->hash;
  }
  
  static int setup_crypt_desc(void)
  {
  	struct device *dev = &pdev->dev;
  	BUILD_BUG_ON(sizeof(struct crypt_ctl) != 64);
  	crypt_virt = dma_alloc_coherent(dev,
  					NPE_QLEN * sizeof(struct crypt_ctl),
  					&crypt_phys, GFP_ATOMIC);
  	if (!crypt_virt)
  		return -ENOMEM;
  	return 0;
  }
  
  static DEFINE_SPINLOCK(desc_lock);
  static struct crypt_ctl *get_crypt_desc(void)
  {
  	int i;
  	static int idx = 0;
  	unsigned long flags;
  
  	spin_lock_irqsave(&desc_lock, flags);
  
  	if (unlikely(!crypt_virt))
  		setup_crypt_desc();
  	if (unlikely(!crypt_virt)) {
  		spin_unlock_irqrestore(&desc_lock, flags);
  		return NULL;
  	}
  	i = idx;
  	if (crypt_virt[i].ctl_flags == CTL_FLAG_UNUSED) {
  		if (++idx >= NPE_QLEN)
  			idx = 0;
  		crypt_virt[i].ctl_flags = CTL_FLAG_USED;
  		spin_unlock_irqrestore(&desc_lock, flags);
  		return crypt_virt +i;
  	} else {
  		spin_unlock_irqrestore(&desc_lock, flags);
  		return NULL;
  	}
  }
  
  static DEFINE_SPINLOCK(emerg_lock);
  static struct crypt_ctl *get_crypt_desc_emerg(void)
  {
  	int i;
  	static int idx = NPE_QLEN;
  	struct crypt_ctl *desc;
  	unsigned long flags;
  
  	desc = get_crypt_desc();
  	if (desc)
  		return desc;
  	if (unlikely(!crypt_virt))
  		return NULL;
  
  	spin_lock_irqsave(&emerg_lock, flags);
  	i = idx;
  	if (crypt_virt[i].ctl_flags == CTL_FLAG_UNUSED) {
  		if (++idx >= NPE_QLEN_TOTAL)
  			idx = NPE_QLEN;
  		crypt_virt[i].ctl_flags = CTL_FLAG_USED;
  		spin_unlock_irqrestore(&emerg_lock, flags);
  		return crypt_virt +i;
  	} else {
  		spin_unlock_irqrestore(&emerg_lock, flags);
  		return NULL;
  	}
  }
  
  static void free_buf_chain(struct device *dev, struct buffer_desc *buf,
  			   dma_addr_t phys)
  {
  	while (buf) {
  		struct buffer_desc *buf1;
  		u32 phys1;
  
  		buf1 = buf->next;
  		phys1 = buf->phys_next;
  		dma_unmap_single(dev, buf->phys_next, buf->buf_len, buf->dir);
  		dma_pool_free(buffer_pool, buf, phys);
  		buf = buf1;
  		phys = phys1;
  	}
  }
  
  static struct tasklet_struct crypto_done_tasklet;
  
  static void finish_scattered_hmac(struct crypt_ctl *crypt)
  {
  	struct aead_request *req = crypt->data.aead_req;
  	struct aead_ctx *req_ctx = aead_request_ctx(req);
  	struct crypto_aead *tfm = crypto_aead_reqtfm(req);
  	int authsize = crypto_aead_authsize(tfm);
  	int decryptlen = req->assoclen + req->cryptlen - authsize;
  
  	if (req_ctx->encrypt) {
  		scatterwalk_map_and_copy(req_ctx->hmac_virt,
  			req->dst, decryptlen, authsize, 1);
  	}
  	dma_pool_free(buffer_pool, req_ctx->hmac_virt, crypt->icv_rev_aes);
  }
  
  static void one_packet(dma_addr_t phys)
  {
  	struct device *dev = &pdev->dev;
  	struct crypt_ctl *crypt;
  	struct ixp_ctx *ctx;
  	int failed;
  
  	failed = phys & 0x1 ? -EBADMSG : 0;
  	phys &= ~0x3;
  	crypt = crypt_phys2virt(phys);
  
  	switch (crypt->ctl_flags & CTL_FLAG_MASK) {
  	case CTL_FLAG_PERFORM_AEAD: {
  		struct aead_request *req = crypt->data.aead_req;
  		struct aead_ctx *req_ctx = aead_request_ctx(req);
  
  		free_buf_chain(dev, req_ctx->src, crypt->src_buf);
  		free_buf_chain(dev, req_ctx->dst, crypt->dst_buf);
  		if (req_ctx->hmac_virt) {
  			finish_scattered_hmac(crypt);
  		}
  		req->base.complete(&req->base, failed);
  		break;
  	}
  	case CTL_FLAG_PERFORM_ABLK: {
  		struct skcipher_request *req = crypt->data.ablk_req;
  		struct ablk_ctx *req_ctx = skcipher_request_ctx(req);
  
  		if (req_ctx->dst) {
  			free_buf_chain(dev, req_ctx->dst, crypt->dst_buf);
  		}
  		free_buf_chain(dev, req_ctx->src, crypt->src_buf);
  		req->base.complete(&req->base, failed);
  		break;
  	}
  	case CTL_FLAG_GEN_ICV:
  		ctx = crypto_tfm_ctx(crypt->data.tfm);
  		dma_pool_free(ctx_pool, crypt->regist_ptr,
  				crypt->regist_buf->phys_addr);
  		dma_pool_free(buffer_pool, crypt->regist_buf, crypt->src_buf);
  		if (atomic_dec_and_test(&ctx->configuring))
  			complete(&ctx->completion);
  		break;
  	case CTL_FLAG_GEN_REVAES:
  		ctx = crypto_tfm_ctx(crypt->data.tfm);
  		*(u32*)ctx->decrypt.npe_ctx &= cpu_to_be32(~CIPH_ENCR);
  		if (atomic_dec_and_test(&ctx->configuring))
  			complete(&ctx->completion);
  		break;
  	default:
  		BUG();
  	}
  	crypt->ctl_flags = CTL_FLAG_UNUSED;
  }
  
  static void irqhandler(void *_unused)
  {
  	tasklet_schedule(&crypto_done_tasklet);
  }
  
  static void crypto_done_action(unsigned long arg)
  {
  	int i;
  
  	for(i=0; i<4; i++) {
  		dma_addr_t phys = qmgr_get_entry(RECV_QID);
  		if (!phys)
  			return;
  		one_packet(phys);
  	}
  	tasklet_schedule(&crypto_done_tasklet);
  }
  
  static int init_ixp_crypto(struct device *dev)
  {
  	int ret = -ENODEV;
  	u32 msg[2] = { 0, 0 };
  
  	if (! ( ~(*IXP4XX_EXP_CFG2) & (IXP4XX_FEATURE_HASH |
  				IXP4XX_FEATURE_AES | IXP4XX_FEATURE_DES))) {
  		printk(KERN_ERR "ixp_crypto: No HW crypto available\n");
  		return ret;
  	}
  	npe_c = npe_request(NPE_ID);
  	if (!npe_c)
  		return ret;
  
  	if (!npe_running(npe_c)) {
  		ret = npe_load_firmware(npe_c, npe_name(npe_c), dev);
  		if (ret)
  			goto npe_release;
  		if (npe_recv_message(npe_c, msg, "STATUS_MSG"))
  			goto npe_error;
  	} else {
  		if (npe_send_message(npe_c, msg, "STATUS_MSG"))
  			goto npe_error;
  
  		if (npe_recv_message(npe_c, msg, "STATUS_MSG"))
  			goto npe_error;
  	}
  
  	switch ((msg[1]>>16) & 0xff) {
  	case 3:
  		printk(KERN_WARNING "Firmware of %s lacks AES support\n",
  				npe_name(npe_c));
  		support_aes = 0;
  		break;
  	case 4:
  	case 5:
  		support_aes = 1;
  		break;
  	default:
  		printk(KERN_ERR "Firmware of %s lacks crypto support\n",
  			npe_name(npe_c));
  		ret = -ENODEV;
  		goto npe_release;
  	}
  	/* buffer_pool will also be used to sometimes store the hmac,
  	 * so assure it is large enough
  	 */
  	BUILD_BUG_ON(SHA1_DIGEST_SIZE > sizeof(struct buffer_desc));
  	buffer_pool = dma_pool_create("buffer", dev,
  			sizeof(struct buffer_desc), 32, 0);
  	ret = -ENOMEM;
  	if (!buffer_pool) {
  		goto err;
  	}
  	ctx_pool = dma_pool_create("context", dev,
  			NPE_CTX_LEN, 16, 0);
  	if (!ctx_pool) {
  		goto err;
  	}
  	ret = qmgr_request_queue(SEND_QID, NPE_QLEN_TOTAL, 0, 0,
  				 "ixp_crypto:out", NULL);
  	if (ret)
  		goto err;
  	ret = qmgr_request_queue(RECV_QID, NPE_QLEN, 0, 0,
  				 "ixp_crypto:in", NULL);
  	if (ret) {
  		qmgr_release_queue(SEND_QID);
  		goto err;
  	}
  	qmgr_set_irq(RECV_QID, QUEUE_IRQ_SRC_NOT_EMPTY, irqhandler, NULL);
  	tasklet_init(&crypto_done_tasklet, crypto_done_action, 0);
  
  	qmgr_enable_irq(RECV_QID);
  	return 0;
  
  npe_error:
  	printk(KERN_ERR "%s not responding\n", npe_name(npe_c));
  	ret = -EIO;
  err:
  	dma_pool_destroy(ctx_pool);
  	dma_pool_destroy(buffer_pool);
  npe_release:
  	npe_release(npe_c);
  	return ret;
  }
  
  static void release_ixp_crypto(struct device *dev)
  {
  	qmgr_disable_irq(RECV_QID);
  	tasklet_kill(&crypto_done_tasklet);
  
  	qmgr_release_queue(SEND_QID);
  	qmgr_release_queue(RECV_QID);
  
  	dma_pool_destroy(ctx_pool);
  	dma_pool_destroy(buffer_pool);
  
  	npe_release(npe_c);
  
  	if (crypt_virt) {
  		dma_free_coherent(dev,
  			NPE_QLEN * sizeof(struct crypt_ctl),
  			crypt_virt, crypt_phys);
  	}
  }
  
  static void reset_sa_dir(struct ix_sa_dir *dir)
  {
  	memset(dir->npe_ctx, 0, NPE_CTX_LEN);
  	dir->npe_ctx_idx = 0;
  	dir->npe_mode = 0;
  }
  
  static int init_sa_dir(struct ix_sa_dir *dir)
  {
  	dir->npe_ctx = dma_pool_alloc(ctx_pool, GFP_KERNEL, &dir->npe_ctx_phys);
  	if (!dir->npe_ctx) {
  		return -ENOMEM;
  	}
  	reset_sa_dir(dir);
  	return 0;
  }
  
  static void free_sa_dir(struct ix_sa_dir *dir)
  {
  	memset(dir->npe_ctx, 0, NPE_CTX_LEN);
  	dma_pool_free(ctx_pool, dir->npe_ctx, dir->npe_ctx_phys);
  }
  
  static int init_tfm(struct crypto_tfm *tfm)
  {
  	struct ixp_ctx *ctx = crypto_tfm_ctx(tfm);
  	int ret;
  
  	atomic_set(&ctx->configuring, 0);
  	ret = init_sa_dir(&ctx->encrypt);
  	if (ret)
  		return ret;
  	ret = init_sa_dir(&ctx->decrypt);
  	if (ret) {
  		free_sa_dir(&ctx->encrypt);
  	}
  	return ret;
  }
  
  static int init_tfm_ablk(struct crypto_skcipher *tfm)
  {
  	crypto_skcipher_set_reqsize(tfm, sizeof(struct ablk_ctx));
  	return init_tfm(crypto_skcipher_tfm(tfm));
  }
  
  static int init_tfm_aead(struct crypto_aead *tfm)
  {
  	crypto_aead_set_reqsize(tfm, sizeof(struct aead_ctx));
  	return init_tfm(crypto_aead_tfm(tfm));
  }
  
  static void exit_tfm(struct crypto_tfm *tfm)
  {
  	struct ixp_ctx *ctx = crypto_tfm_ctx(tfm);
  	free_sa_dir(&ctx->encrypt);
  	free_sa_dir(&ctx->decrypt);
  }
  
  static void exit_tfm_ablk(struct crypto_skcipher *tfm)
  {
  	exit_tfm(crypto_skcipher_tfm(tfm));
  }
  
  static void exit_tfm_aead(struct crypto_aead *tfm)
  {
  	exit_tfm(crypto_aead_tfm(tfm));
  }
  
  static int register_chain_var(struct crypto_tfm *tfm, u8 xpad, u32 target,
  		int init_len, u32 ctx_addr, const u8 *key, int key_len)
  {
  	struct ixp_ctx *ctx = crypto_tfm_ctx(tfm);
  	struct crypt_ctl *crypt;
  	struct buffer_desc *buf;
  	int i;
  	u8 *pad;
  	dma_addr_t pad_phys, buf_phys;
  
  	BUILD_BUG_ON(NPE_CTX_LEN < HMAC_PAD_BLOCKLEN);
  	pad = dma_pool_alloc(ctx_pool, GFP_KERNEL, &pad_phys);
  	if (!pad)
  		return -ENOMEM;
  	buf = dma_pool_alloc(buffer_pool, GFP_KERNEL, &buf_phys);
  	if (!buf) {
  		dma_pool_free(ctx_pool, pad, pad_phys);
  		return -ENOMEM;
  	}
  	crypt = get_crypt_desc_emerg();
  	if (!crypt) {
  		dma_pool_free(ctx_pool, pad, pad_phys);
  		dma_pool_free(buffer_pool, buf, buf_phys);
  		return -EAGAIN;
  	}
  
  	memcpy(pad, key, key_len);
  	memset(pad + key_len, 0, HMAC_PAD_BLOCKLEN - key_len);
  	for (i = 0; i < HMAC_PAD_BLOCKLEN; i++) {
  		pad[i] ^= xpad;
  	}
  
  	crypt->data.tfm = tfm;
  	crypt->regist_ptr = pad;
  	crypt->regist_buf = buf;
  
  	crypt->auth_offs = 0;
  	crypt->auth_len = HMAC_PAD_BLOCKLEN;
  	crypt->crypto_ctx = ctx_addr;
  	crypt->src_buf = buf_phys;
  	crypt->icv_rev_aes = target;
  	crypt->mode = NPE_OP_HASH_GEN_ICV;
  	crypt->init_len = init_len;
  	crypt->ctl_flags |= CTL_FLAG_GEN_ICV;
  
  	buf->next = 0;
  	buf->buf_len = HMAC_PAD_BLOCKLEN;
  	buf->pkt_len = 0;
  	buf->phys_addr = pad_phys;
  
  	atomic_inc(&ctx->configuring);
  	qmgr_put_entry(SEND_QID, crypt_virt2phys(crypt));
  	BUG_ON(qmgr_stat_overflow(SEND_QID));
  	return 0;
  }
  
  static int setup_auth(struct crypto_tfm *tfm, int encrypt, unsigned authsize,
  		const u8 *key, int key_len, unsigned digest_len)
  {
  	u32 itarget, otarget, npe_ctx_addr;
  	unsigned char *cinfo;
  	int init_len, ret = 0;
  	u32 cfgword;
  	struct ix_sa_dir *dir;
  	struct ixp_ctx *ctx = crypto_tfm_ctx(tfm);
  	const struct ix_hash_algo *algo;
  
  	dir = encrypt ? &ctx->encrypt : &ctx->decrypt;
  	cinfo = dir->npe_ctx + dir->npe_ctx_idx;
  	algo = ix_hash(tfm);
  
  	/* write cfg word to cryptinfo */
  	cfgword = algo->cfgword | ( authsize << 6); /* (authsize/4) << 8 */
  #ifndef __ARMEB__
  	cfgword ^= 0xAA000000; /* change the "byte swap" flags */
  #endif
  	*(u32*)cinfo = cpu_to_be32(cfgword);
  	cinfo += sizeof(cfgword);
  
  	/* write ICV to cryptinfo */
  	memcpy(cinfo, algo->icv, digest_len);
  	cinfo += digest_len;
  
  	itarget = dir->npe_ctx_phys + dir->npe_ctx_idx
  				+ sizeof(algo->cfgword);
  	otarget = itarget + digest_len;
  	init_len = cinfo - (dir->npe_ctx + dir->npe_ctx_idx);
  	npe_ctx_addr = dir->npe_ctx_phys + dir->npe_ctx_idx;
  
  	dir->npe_ctx_idx += init_len;
  	dir->npe_mode |= NPE_OP_HASH_ENABLE;
  
  	if (!encrypt)
  		dir->npe_mode |= NPE_OP_HASH_VERIFY;
  
  	ret = register_chain_var(tfm, HMAC_OPAD_VALUE, otarget,
  			init_len, npe_ctx_addr, key, key_len);
  	if (ret)
  		return ret;
  	return register_chain_var(tfm, HMAC_IPAD_VALUE, itarget,
  			init_len, npe_ctx_addr, key, key_len);
  }
  
  static int gen_rev_aes_key(struct crypto_tfm *tfm)
  {
  	struct crypt_ctl *crypt;
  	struct ixp_ctx *ctx = crypto_tfm_ctx(tfm);
  	struct ix_sa_dir *dir = &ctx->decrypt;
  
  	crypt = get_crypt_desc_emerg();
  	if (!crypt) {
  		return -EAGAIN;
  	}
  	*(u32*)dir->npe_ctx |= cpu_to_be32(CIPH_ENCR);
  
  	crypt->data.tfm = tfm;
  	crypt->crypt_offs = 0;
  	crypt->crypt_len = AES_BLOCK128;
  	crypt->src_buf = 0;
  	crypt->crypto_ctx = dir->npe_ctx_phys;
  	crypt->icv_rev_aes = dir->npe_ctx_phys + sizeof(u32);
  	crypt->mode = NPE_OP_ENC_GEN_KEY;
  	crypt->init_len = dir->npe_ctx_idx;
  	crypt->ctl_flags |= CTL_FLAG_GEN_REVAES;
  
  	atomic_inc(&ctx->configuring);
  	qmgr_put_entry(SEND_QID, crypt_virt2phys(crypt));
  	BUG_ON(qmgr_stat_overflow(SEND_QID));
  	return 0;
  }
  
  static int setup_cipher(struct crypto_tfm *tfm, int encrypt,
  		const u8 *key, int key_len)
  {
  	u8 *cinfo;
  	u32 cipher_cfg;
  	u32 keylen_cfg = 0;
  	struct ix_sa_dir *dir;
  	struct ixp_ctx *ctx = crypto_tfm_ctx(tfm);
  	int err;
  
  	dir = encrypt ? &ctx->encrypt : &ctx->decrypt;
  	cinfo = dir->npe_ctx;
  
  	if (encrypt) {
  		cipher_cfg = cipher_cfg_enc(tfm);
  		dir->npe_mode |= NPE_OP_CRYPT_ENCRYPT;
  	} else {
  		cipher_cfg = cipher_cfg_dec(tfm);
  	}
  	if (cipher_cfg & MOD_AES) {
  		switch (key_len) {
  		case 16: keylen_cfg = MOD_AES128; break;
  		case 24: keylen_cfg = MOD_AES192; break;
  		case 32: keylen_cfg = MOD_AES256; break;
  		default:
  			return -EINVAL;
  		}
  		cipher_cfg |= keylen_cfg;
  	} else {
  		err = crypto_des_verify_key(tfm, key);
  		if (err)
  			return err;
  	}
  	/* write cfg word to cryptinfo */
  	*(u32*)cinfo = cpu_to_be32(cipher_cfg);
  	cinfo += sizeof(cipher_cfg);
  
  	/* write cipher key to cryptinfo */
  	memcpy(cinfo, key, key_len);
  	/* NPE wants keylen set to DES3_EDE_KEY_SIZE even for single DES */
  	if (key_len < DES3_EDE_KEY_SIZE && !(cipher_cfg & MOD_AES)) {
  		memset(cinfo + key_len, 0, DES3_EDE_KEY_SIZE -key_len);
  		key_len = DES3_EDE_KEY_SIZE;
  	}
  	dir->npe_ctx_idx = sizeof(cipher_cfg) + key_len;
  	dir->npe_mode |= NPE_OP_CRYPT_ENABLE;
  	if ((cipher_cfg & MOD_AES) && !encrypt) {
  		return gen_rev_aes_key(tfm);
  	}
  	return 0;
  }
  
  static struct buffer_desc *chainup_buffers(struct device *dev,
  		struct scatterlist *sg,	unsigned nbytes,
  		struct buffer_desc *buf, gfp_t flags,
  		enum dma_data_direction dir)
  {
  	for (; nbytes > 0; sg = sg_next(sg)) {
  		unsigned len = min(nbytes, sg->length);
  		struct buffer_desc *next_buf;
  		dma_addr_t next_buf_phys;
  		void *ptr;
  
  		nbytes -= len;
  		ptr = sg_virt(sg);
  		next_buf = dma_pool_alloc(buffer_pool, flags, &next_buf_phys);
  		if (!next_buf) {
  			buf = NULL;
  			break;
  		}
  		sg_dma_address(sg) = dma_map_single(dev, ptr, len, dir);
  		buf->next = next_buf;
  		buf->phys_next = next_buf_phys;
  		buf = next_buf;
  
  		buf->phys_addr = sg_dma_address(sg);
  		buf->buf_len = len;
  		buf->dir = dir;
  	}
  	buf->next = NULL;
  	buf->phys_next = 0;
  	return buf;
  }
  
  static int ablk_setkey(struct crypto_skcipher *tfm, const u8 *key,
  			unsigned int key_len)
  {
  	struct ixp_ctx *ctx = crypto_skcipher_ctx(tfm);
  	int ret;
  
  	init_completion(&ctx->completion);
  	atomic_inc(&ctx->configuring);
  
  	reset_sa_dir(&ctx->encrypt);
  	reset_sa_dir(&ctx->decrypt);
  
  	ctx->encrypt.npe_mode = NPE_OP_HMAC_DISABLE;
  	ctx->decrypt.npe_mode = NPE_OP_HMAC_DISABLE;
  
  	ret = setup_cipher(&tfm->base, 0, key, key_len);
  	if (ret)
  		goto out;
  	ret = setup_cipher(&tfm->base, 1, key, key_len);
  out:
  	if (!atomic_dec_and_test(&ctx->configuring))
  		wait_for_completion(&ctx->completion);
  	return ret;
  }
  
  static int ablk_des3_setkey(struct crypto_skcipher *tfm, const u8 *key,
  			    unsigned int key_len)
  {
  	return verify_skcipher_des3_key(tfm, key) ?:
  	       ablk_setkey(tfm, key, key_len);
  }
  
  static int ablk_rfc3686_setkey(struct crypto_skcipher *tfm, const u8 *key,
  		unsigned int key_len)
  {
  	struct ixp_ctx *ctx = crypto_skcipher_ctx(tfm);
  
  	/* the nonce is stored in bytes at end of key */
  	if (key_len < CTR_RFC3686_NONCE_SIZE)
  		return -EINVAL;
  
  	memcpy(ctx->nonce, key + (key_len - CTR_RFC3686_NONCE_SIZE),
  			CTR_RFC3686_NONCE_SIZE);
  
  	key_len -= CTR_RFC3686_NONCE_SIZE;
  	return ablk_setkey(tfm, key, key_len);
  }
  
  static int ablk_perform(struct skcipher_request *req, int encrypt)
  {
  	struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
  	struct ixp_ctx *ctx = crypto_skcipher_ctx(tfm);
  	unsigned ivsize = crypto_skcipher_ivsize(tfm);
  	struct ix_sa_dir *dir;
  	struct crypt_ctl *crypt;
  	unsigned int nbytes = req->cryptlen;
  	enum dma_data_direction src_direction = DMA_BIDIRECTIONAL;
  	struct ablk_ctx *req_ctx = skcipher_request_ctx(req);
  	struct buffer_desc src_hook;
  	struct device *dev = &pdev->dev;
  	gfp_t flags = req->base.flags & CRYPTO_TFM_REQ_MAY_SLEEP ?
  				GFP_KERNEL : GFP_ATOMIC;
  
  	if (qmgr_stat_full(SEND_QID))
  		return -EAGAIN;
  	if (atomic_read(&ctx->configuring))
  		return -EAGAIN;
  
  	dir = encrypt ? &ctx->encrypt : &ctx->decrypt;
  
  	crypt = get_crypt_desc();
  	if (!crypt)
  		return -ENOMEM;
  
  	crypt->data.ablk_req = req;
  	crypt->crypto_ctx = dir->npe_ctx_phys;
  	crypt->mode = dir->npe_mode;
  	crypt->init_len = dir->npe_ctx_idx;
  
  	crypt->crypt_offs = 0;
  	crypt->crypt_len = nbytes;
  
  	BUG_ON(ivsize && !req->iv);
  	memcpy(crypt->iv, req->iv, ivsize);
  	if (req->src != req->dst) {
  		struct buffer_desc dst_hook;
  		crypt->mode |= NPE_OP_NOT_IN_PLACE;
  		/* This was never tested by Intel
  		 * for more than one dst buffer, I think. */
  		req_ctx->dst = NULL;
  		if (!chainup_buffers(dev, req->dst, nbytes, &dst_hook,
  					flags, DMA_FROM_DEVICE))
  			goto free_buf_dest;
  		src_direction = DMA_TO_DEVICE;
  		req_ctx->dst = dst_hook.next;
  		crypt->dst_buf = dst_hook.phys_next;
  	} else {
  		req_ctx->dst = NULL;
  	}
  	req_ctx->src = NULL;
  	if (!chainup_buffers(dev, req->src, nbytes, &src_hook,
  				flags, src_direction))
  		goto free_buf_src;
  
  	req_ctx->src = src_hook.next;
  	crypt->src_buf = src_hook.phys_next;
  	crypt->ctl_flags |= CTL_FLAG_PERFORM_ABLK;
  	qmgr_put_entry(SEND_QID, crypt_virt2phys(crypt));
  	BUG_ON(qmgr_stat_overflow(SEND_QID));
  	return -EINPROGRESS;
  
  free_buf_src:
  	free_buf_chain(dev, req_ctx->src, crypt->src_buf);
  free_buf_dest:
  	if (req->src != req->dst) {
  		free_buf_chain(dev, req_ctx->dst, crypt->dst_buf);
  	}
  	crypt->ctl_flags = CTL_FLAG_UNUSED;
  	return -ENOMEM;
  }
  
  static int ablk_encrypt(struct skcipher_request *req)
  {
  	return ablk_perform(req, 1);
  }
  
  static int ablk_decrypt(struct skcipher_request *req)
  {
  	return ablk_perform(req, 0);
  }
  
  static int ablk_rfc3686_crypt(struct skcipher_request *req)
  {
  	struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
  	struct ixp_ctx *ctx = crypto_skcipher_ctx(tfm);
  	u8 iv[CTR_RFC3686_BLOCK_SIZE];
  	u8 *info = req->iv;
  	int ret;
  
  	/* set up counter block */
          memcpy(iv, ctx->nonce, CTR_RFC3686_NONCE_SIZE);
  	memcpy(iv + CTR_RFC3686_NONCE_SIZE, info, CTR_RFC3686_IV_SIZE);
  
  	/* initialize counter portion of counter block */
  	*(__be32 *)(iv + CTR_RFC3686_NONCE_SIZE + CTR_RFC3686_IV_SIZE) =
  		cpu_to_be32(1);
  
  	req->iv = iv;
  	ret = ablk_perform(req, 1);
  	req->iv = info;
  	return ret;
  }
  
  static int aead_perform(struct aead_request *req, int encrypt,
  		int cryptoffset, int eff_cryptlen, u8 *iv)
  {
  	struct crypto_aead *tfm = crypto_aead_reqtfm(req);
  	struct ixp_ctx *ctx = crypto_aead_ctx(tfm);
  	unsigned ivsize = crypto_aead_ivsize(tfm);
  	unsigned authsize = crypto_aead_authsize(tfm);
  	struct ix_sa_dir *dir;
  	struct crypt_ctl *crypt;
  	unsigned int cryptlen;
  	struct buffer_desc *buf, src_hook;
  	struct aead_ctx *req_ctx = aead_request_ctx(req);
  	struct device *dev = &pdev->dev;
  	gfp_t flags = req->base.flags & CRYPTO_TFM_REQ_MAY_SLEEP ?
  				GFP_KERNEL : GFP_ATOMIC;
  	enum dma_data_direction src_direction = DMA_BIDIRECTIONAL;
  	unsigned int lastlen;
  
  	if (qmgr_stat_full(SEND_QID))
  		return -EAGAIN;
  	if (atomic_read(&ctx->configuring))
  		return -EAGAIN;
  
  	if (encrypt) {
  		dir = &ctx->encrypt;
  		cryptlen = req->cryptlen;
  	} else {
  		dir = &ctx->decrypt;
  		/* req->cryptlen includes the authsize when decrypting */
  		cryptlen = req->cryptlen -authsize;
  		eff_cryptlen -= authsize;
  	}
  	crypt = get_crypt_desc();
  	if (!crypt)
  		return -ENOMEM;
  
  	crypt->data.aead_req = req;
  	crypt->crypto_ctx = dir->npe_ctx_phys;
  	crypt->mode = dir->npe_mode;
  	crypt->init_len = dir->npe_ctx_idx;
  
  	crypt->crypt_offs = cryptoffset;
  	crypt->crypt_len = eff_cryptlen;
  
  	crypt->auth_offs = 0;
  	crypt->auth_len = req->assoclen + cryptlen;
  	BUG_ON(ivsize && !req->iv);
  	memcpy(crypt->iv, req->iv, ivsize);
  
  	buf = chainup_buffers(dev, req->src, crypt->auth_len,
  			      &src_hook, flags, src_direction);
  	req_ctx->src = src_hook.next;
  	crypt->src_buf = src_hook.phys_next;
  	if (!buf)
  		goto free_buf_src;
  
  	lastlen = buf->buf_len;
  	if (lastlen >= authsize)
  		crypt->icv_rev_aes = buf->phys_addr +
  				     buf->buf_len - authsize;
  
  	req_ctx->dst = NULL;
  
  	if (req->src != req->dst) {
  		struct buffer_desc dst_hook;
  
  		crypt->mode |= NPE_OP_NOT_IN_PLACE;
  		src_direction = DMA_TO_DEVICE;
  
  		buf = chainup_buffers(dev, req->dst, crypt->auth_len,
  				      &dst_hook, flags, DMA_FROM_DEVICE);
  		req_ctx->dst = dst_hook.next;
  		crypt->dst_buf = dst_hook.phys_next;
  
  		if (!buf)
  			goto free_buf_dst;
  
  		if (encrypt) {
  			lastlen = buf->buf_len;
  			if (lastlen >= authsize)
  				crypt->icv_rev_aes = buf->phys_addr +
  						     buf->buf_len - authsize;
  		}
  	}
  
  	if (unlikely(lastlen < authsize)) {
  		/* The 12 hmac bytes are scattered,
  		 * we need to copy them into a safe buffer */
  		req_ctx->hmac_virt = dma_pool_alloc(buffer_pool, flags,
  				&crypt->icv_rev_aes);
  		if (unlikely(!req_ctx->hmac_virt))
  			goto free_buf_dst;
  		if (!encrypt) {
  			scatterwalk_map_and_copy(req_ctx->hmac_virt,
  				req->src, cryptlen, authsize, 0);
  		}
  		req_ctx->encrypt = encrypt;
  	} else {
  		req_ctx->hmac_virt = NULL;
  	}
  
  	crypt->ctl_flags |= CTL_FLAG_PERFORM_AEAD;
  	qmgr_put_entry(SEND_QID, crypt_virt2phys(crypt));
  	BUG_ON(qmgr_stat_overflow(SEND_QID));
  	return -EINPROGRESS;
  
  free_buf_dst:
  	free_buf_chain(dev, req_ctx->dst, crypt->dst_buf);
  free_buf_src:
  	free_buf_chain(dev, req_ctx->src, crypt->src_buf);
  	crypt->ctl_flags = CTL_FLAG_UNUSED;
  	return -ENOMEM;
  }
  
  static int aead_setup(struct crypto_aead *tfm, unsigned int authsize)
  {
  	struct ixp_ctx *ctx = crypto_aead_ctx(tfm);
  	unsigned digest_len = crypto_aead_maxauthsize(tfm);
  	int ret;
  
  	if (!ctx->enckey_len && !ctx->authkey_len)
  		return 0;
  	init_completion(&ctx->completion);
  	atomic_inc(&ctx->configuring);
  
  	reset_sa_dir(&ctx->encrypt);
  	reset_sa_dir(&ctx->decrypt);
  
  	ret = setup_cipher(&tfm->base, 0, ctx->enckey, ctx->enckey_len);
  	if (ret)
  		goto out;
  	ret = setup_cipher(&tfm->base, 1, ctx->enckey, ctx->enckey_len);
  	if (ret)
  		goto out;
  	ret = setup_auth(&tfm->base, 0, authsize, ctx->authkey,
  			ctx->authkey_len, digest_len);
  	if (ret)
  		goto out;
  	ret = setup_auth(&tfm->base, 1, authsize,  ctx->authkey,
  			ctx->authkey_len, digest_len);
  out:
  	if (!atomic_dec_and_test(&ctx->configuring))
  		wait_for_completion(&ctx->completion);
  	return ret;
  }
  
  static int aead_setauthsize(struct crypto_aead *tfm, unsigned int authsize)
  {
  	int max = crypto_aead_maxauthsize(tfm) >> 2;
  
  	if ((authsize>>2) < 1 || (authsize>>2) > max || (authsize & 3))
  		return -EINVAL;
  	return aead_setup(tfm, authsize);
  }
  
  static int aead_setkey(struct crypto_aead *tfm, const u8 *key,
  			unsigned int keylen)
  {
  	struct ixp_ctx *ctx = crypto_aead_ctx(tfm);
  	struct crypto_authenc_keys keys;
  
  	if (crypto_authenc_extractkeys(&keys, key, keylen) != 0)
  		goto badkey;
  
  	if (keys.authkeylen > sizeof(ctx->authkey))
  		goto badkey;
  
  	if (keys.enckeylen > sizeof(ctx->enckey))
  		goto badkey;
  
  	memcpy(ctx->authkey, keys.authkey, keys.authkeylen);
  	memcpy(ctx->enckey, keys.enckey, keys.enckeylen);
  	ctx->authkey_len = keys.authkeylen;
  	ctx->enckey_len = keys.enckeylen;
  
  	memzero_explicit(&keys, sizeof(keys));
  	return aead_setup(tfm, crypto_aead_authsize(tfm));
  badkey:
  	memzero_explicit(&keys, sizeof(keys));
  	return -EINVAL;
  }
  
  static int des3_aead_setkey(struct crypto_aead *tfm, const u8 *key,
  			    unsigned int keylen)
  {
  	struct ixp_ctx *ctx = crypto_aead_ctx(tfm);
  	struct crypto_authenc_keys keys;
  	int err;
  
  	err = crypto_authenc_extractkeys(&keys, key, keylen);
  	if (unlikely(err))
  		goto badkey;
  
  	err = -EINVAL;
  	if (keys.authkeylen > sizeof(ctx->authkey))
  		goto badkey;
  
  	err = verify_aead_des3_key(tfm, keys.enckey, keys.enckeylen);
  	if (err)
  		goto badkey;
  
  	memcpy(ctx->authkey, keys.authkey, keys.authkeylen);
  	memcpy(ctx->enckey, keys.enckey, keys.enckeylen);
  	ctx->authkey_len = keys.authkeylen;
  	ctx->enckey_len = keys.enckeylen;
  
  	memzero_explicit(&keys, sizeof(keys));
  	return aead_setup(tfm, crypto_aead_authsize(tfm));
  badkey:
  	memzero_explicit(&keys, sizeof(keys));
  	return err;
  }
  
  static int aead_encrypt(struct aead_request *req)
  {
  	return aead_perform(req, 1, req->assoclen, req->cryptlen, req->iv);
  }
  
  static int aead_decrypt(struct aead_request *req)
  {
  	return aead_perform(req, 0, req->assoclen, req->cryptlen, req->iv);
  }
  
  static struct ixp_alg ixp4xx_algos[] = {
  {
  	.crypto	= {
  		.base.cra_name		= "cbc(des)",
  		.base.cra_blocksize	= DES_BLOCK_SIZE,
  
  		.min_keysize		= DES_KEY_SIZE,
  		.max_keysize		= DES_KEY_SIZE,
  		.ivsize			= DES_BLOCK_SIZE,
  	},
  	.cfg_enc = CIPH_ENCR | MOD_DES | MOD_CBC_ENC | KEYLEN_192,
  	.cfg_dec = CIPH_DECR | MOD_DES | MOD_CBC_DEC | KEYLEN_192,
  
  }, {
  	.crypto	= {
  		.base.cra_name		= "ecb(des)",
  		.base.cra_blocksize	= DES_BLOCK_SIZE,
  		.min_keysize		= DES_KEY_SIZE,
  		.max_keysize		= DES_KEY_SIZE,
  	},
  	.cfg_enc = CIPH_ENCR | MOD_DES | MOD_ECB | KEYLEN_192,
  	.cfg_dec = CIPH_DECR | MOD_DES | MOD_ECB | KEYLEN_192,
  }, {
  	.crypto	= {
  		.base.cra_name		= "cbc(des3_ede)",
  		.base.cra_blocksize	= DES3_EDE_BLOCK_SIZE,
  
  		.min_keysize		= DES3_EDE_KEY_SIZE,
  		.max_keysize		= DES3_EDE_KEY_SIZE,
  		.ivsize			= DES3_EDE_BLOCK_SIZE,
  		.setkey			= ablk_des3_setkey,
  	},
  	.cfg_enc = CIPH_ENCR | MOD_3DES | MOD_CBC_ENC | KEYLEN_192,
  	.cfg_dec = CIPH_DECR | MOD_3DES | MOD_CBC_DEC | KEYLEN_192,
  }, {
  	.crypto	= {
  		.base.cra_name		= "ecb(des3_ede)",
  		.base.cra_blocksize	= DES3_EDE_BLOCK_SIZE,
  
  		.min_keysize		= DES3_EDE_KEY_SIZE,
  		.max_keysize		= DES3_EDE_KEY_SIZE,
  		.setkey			= ablk_des3_setkey,
  	},
  	.cfg_enc = CIPH_ENCR | MOD_3DES | MOD_ECB | KEYLEN_192,
  	.cfg_dec = CIPH_DECR | MOD_3DES | MOD_ECB | KEYLEN_192,
  }, {
  	.crypto	= {
  		.base.cra_name		= "cbc(aes)",
  		.base.cra_blocksize	= AES_BLOCK_SIZE,
  
  		.min_keysize		= AES_MIN_KEY_SIZE,
  		.max_keysize		= AES_MAX_KEY_SIZE,
  		.ivsize			= AES_BLOCK_SIZE,
  	},
  	.cfg_enc = CIPH_ENCR | MOD_AES | MOD_CBC_ENC,
  	.cfg_dec = CIPH_DECR | MOD_AES | MOD_CBC_DEC,
  }, {
  	.crypto	= {
  		.base.cra_name		= "ecb(aes)",
  		.base.cra_blocksize	= AES_BLOCK_SIZE,
  
  		.min_keysize		= AES_MIN_KEY_SIZE,
  		.max_keysize		= AES_MAX_KEY_SIZE,
  	},
  	.cfg_enc = CIPH_ENCR | MOD_AES | MOD_ECB,
  	.cfg_dec = CIPH_DECR | MOD_AES | MOD_ECB,
  }, {
  	.crypto	= {
  		.base.cra_name		= "ctr(aes)",
  		.base.cra_blocksize	= 1,
  
  		.min_keysize		= AES_MIN_KEY_SIZE,
  		.max_keysize		= AES_MAX_KEY_SIZE,
  		.ivsize			= AES_BLOCK_SIZE,
  	},
  	.cfg_enc = CIPH_ENCR | MOD_AES | MOD_CTR,
  	.cfg_dec = CIPH_ENCR | MOD_AES | MOD_CTR,
  }, {
  	.crypto	= {
  		.base.cra_name		= "rfc3686(ctr(aes))",
  		.base.cra_blocksize	= 1,
  
  		.min_keysize		= AES_MIN_KEY_SIZE,
  		.max_keysize		= AES_MAX_KEY_SIZE,
  		.ivsize			= AES_BLOCK_SIZE,
  		.setkey			= ablk_rfc3686_setkey,
  		.encrypt		= ablk_rfc3686_crypt,
  		.decrypt		= ablk_rfc3686_crypt,
  	},
  	.cfg_enc = CIPH_ENCR | MOD_AES | MOD_CTR,
  	.cfg_dec = CIPH_ENCR | MOD_AES | MOD_CTR,
  } };
  
  static struct ixp_aead_alg ixp4xx_aeads[] = {
  {
  	.crypto	= {
  		.base = {
  			.cra_name	= "authenc(hmac(md5),cbc(des))",
  			.cra_blocksize	= DES_BLOCK_SIZE,
  		},
  		.ivsize		= DES_BLOCK_SIZE,
  		.maxauthsize	= MD5_DIGEST_SIZE,
  	},
  	.hash = &hash_alg_md5,
  	.cfg_enc = CIPH_ENCR | MOD_DES | MOD_CBC_ENC | KEYLEN_192,
  	.cfg_dec = CIPH_DECR | MOD_DES | MOD_CBC_DEC | KEYLEN_192,
  }, {
  	.crypto	= {
  		.base = {
  			.cra_name	= "authenc(hmac(md5),cbc(des3_ede))",
  			.cra_blocksize	= DES3_EDE_BLOCK_SIZE,
  		},
  		.ivsize		= DES3_EDE_BLOCK_SIZE,
  		.maxauthsize	= MD5_DIGEST_SIZE,
  		.setkey		= des3_aead_setkey,
  	},
  	.hash = &hash_alg_md5,
  	.cfg_enc = CIPH_ENCR | MOD_3DES | MOD_CBC_ENC | KEYLEN_192,
  	.cfg_dec = CIPH_DECR | MOD_3DES | MOD_CBC_DEC | KEYLEN_192,
  }, {
  	.crypto	= {
  		.base = {
  			.cra_name	= "authenc(hmac(sha1),cbc(des))",
  			.cra_blocksize	= DES_BLOCK_SIZE,
  		},
  			.ivsize		= DES_BLOCK_SIZE,
  			.maxauthsize	= SHA1_DIGEST_SIZE,
  	},
  	.hash = &hash_alg_sha1,
  	.cfg_enc = CIPH_ENCR | MOD_DES | MOD_CBC_ENC | KEYLEN_192,
  	.cfg_dec = CIPH_DECR | MOD_DES | MOD_CBC_DEC | KEYLEN_192,
  }, {
  	.crypto	= {
  		.base = {
  			.cra_name	= "authenc(hmac(sha1),cbc(des3_ede))",
  			.cra_blocksize	= DES3_EDE_BLOCK_SIZE,
  		},
  		.ivsize		= DES3_EDE_BLOCK_SIZE,
  		.maxauthsize	= SHA1_DIGEST_SIZE,
  		.setkey		= des3_aead_setkey,
  	},
  	.hash = &hash_alg_sha1,
  	.cfg_enc = CIPH_ENCR | MOD_3DES | MOD_CBC_ENC | KEYLEN_192,
  	.cfg_dec = CIPH_DECR | MOD_3DES | MOD_CBC_DEC | KEYLEN_192,
  }, {
  	.crypto	= {
  		.base = {
  			.cra_name	= "authenc(hmac(md5),cbc(aes))",
  			.cra_blocksize	= AES_BLOCK_SIZE,
  		},
  		.ivsize		= AES_BLOCK_SIZE,
  		.maxauthsize	= MD5_DIGEST_SIZE,
  	},
  	.hash = &hash_alg_md5,
  	.cfg_enc = CIPH_ENCR | MOD_AES | MOD_CBC_ENC,
  	.cfg_dec = CIPH_DECR | MOD_AES | MOD_CBC_DEC,
  }, {
  	.crypto	= {
  		.base = {
  			.cra_name	= "authenc(hmac(sha1),cbc(aes))",
  			.cra_blocksize	= AES_BLOCK_SIZE,
  		},
  		.ivsize		= AES_BLOCK_SIZE,
  		.maxauthsize	= SHA1_DIGEST_SIZE,
  	},
  	.hash = &hash_alg_sha1,
  	.cfg_enc = CIPH_ENCR | MOD_AES | MOD_CBC_ENC,
  	.cfg_dec = CIPH_DECR | MOD_AES | MOD_CBC_DEC,
  } };
  
  #define IXP_POSTFIX "-ixp4xx"
  
  static const struct platform_device_info ixp_dev_info __initdata = {
  	.name		= DRIVER_NAME,
  	.id		= 0,
  	.dma_mask	= DMA_BIT_MASK(32),
  };
  
  static int __init ixp_module_init(void)
  {
  	int num = ARRAY_SIZE(ixp4xx_algos);
  	int i, err;
  
  	pdev = platform_device_register_full(&ixp_dev_info);
  	if (IS_ERR(pdev))
  		return PTR_ERR(pdev);
  
  	err = init_ixp_crypto(&pdev->dev);
  	if (err) {
  		platform_device_unregister(pdev);
  		return err;
  	}
  	for (i=0; i< num; i++) {
  		struct skcipher_alg *cra = &ixp4xx_algos[i].crypto;
  
  		if (snprintf(cra->base.cra_driver_name, CRYPTO_MAX_ALG_NAME,
  			"%s"IXP_POSTFIX, cra->base.cra_name) >=
  			CRYPTO_MAX_ALG_NAME)
  		{
  			continue;
  		}
  		if (!support_aes && (ixp4xx_algos[i].cfg_enc & MOD_AES)) {
  			continue;
  		}
  
  		/* block ciphers */
  		cra->base.cra_flags = CRYPTO_ALG_KERN_DRIVER_ONLY |
  				      CRYPTO_ALG_ASYNC |
  				      CRYPTO_ALG_ALLOCATES_MEMORY;
  		if (!cra->setkey)
  			cra->setkey = ablk_setkey;
  		if (!cra->encrypt)
  			cra->encrypt = ablk_encrypt;
  		if (!cra->decrypt)
  			cra->decrypt = ablk_decrypt;
  		cra->init = init_tfm_ablk;
  		cra->exit = exit_tfm_ablk;
  
  		cra->base.cra_ctxsize = sizeof(struct ixp_ctx);
  		cra->base.cra_module = THIS_MODULE;
  		cra->base.cra_alignmask = 3;
  		cra->base.cra_priority = 300;
  		if (crypto_register_skcipher(cra))
  			printk(KERN_ERR "Failed to register '%s'\n",
  				cra->base.cra_name);
  		else
  			ixp4xx_algos[i].registered = 1;
  	}
  
  	for (i = 0; i < ARRAY_SIZE(ixp4xx_aeads); i++) {
  		struct aead_alg *cra = &ixp4xx_aeads[i].crypto;
  
  		if (snprintf(cra->base.cra_driver_name, CRYPTO_MAX_ALG_NAME,
  			     "%s"IXP_POSTFIX, cra->base.cra_name) >=
  		    CRYPTO_MAX_ALG_NAME)
  			continue;
  		if (!support_aes && (ixp4xx_algos[i].cfg_enc & MOD_AES))
  			continue;
  
  		/* authenc */
  		cra->base.cra_flags = CRYPTO_ALG_KERN_DRIVER_ONLY |
  				      CRYPTO_ALG_ASYNC |
  				      CRYPTO_ALG_ALLOCATES_MEMORY;
  		cra->setkey = cra->setkey ?: aead_setkey;
  		cra->setauthsize = aead_setauthsize;
  		cra->encrypt = aead_encrypt;
  		cra->decrypt = aead_decrypt;
  		cra->init = init_tfm_aead;
  		cra->exit = exit_tfm_aead;
  
  		cra->base.cra_ctxsize = sizeof(struct ixp_ctx);
  		cra->base.cra_module = THIS_MODULE;
  		cra->base.cra_alignmask = 3;
  		cra->base.cra_priority = 300;
  
  		if (crypto_register_aead(cra))
  			printk(KERN_ERR "Failed to register '%s'\n",
  				cra->base.cra_driver_name);
  		else
  			ixp4xx_aeads[i].registered = 1;
  	}
  	return 0;
  }
  
  static void __exit ixp_module_exit(void)
  {
  	int num = ARRAY_SIZE(ixp4xx_algos);
  	int i;
  
  	for (i = 0; i < ARRAY_SIZE(ixp4xx_aeads); i++) {
  		if (ixp4xx_aeads[i].registered)
  			crypto_unregister_aead(&ixp4xx_aeads[i].crypto);
  	}
  
  	for (i=0; i< num; i++) {
  		if (ixp4xx_algos[i].registered)
  			crypto_unregister_skcipher(&ixp4xx_algos[i].crypto);
  	}
  	release_ixp_crypto(&pdev->dev);
  	platform_device_unregister(pdev);
  }
  
  module_init(ixp_module_init);
  module_exit(ixp_module_exit);
  
  MODULE_LICENSE("GPL");
  MODULE_AUTHOR("Christian Hohnstaedt <chohnstaedt@innominate.com>");
  MODULE_DESCRIPTION("IXP4xx hardware crypto");
  
  