Adding upstream version 4.19.249.upstream/4.19.249

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

8 files changed, 3261 insertions, 0 deletions

diff --git a/drivers/crypto/amcc/Makefile b/drivers/crypto/amcc/Makefile
new file mode 100644
index 000000000..e33c185fc
--- /dev/null
+++ b/drivers/crypto/amcc/Makefile
@@ -0,0 +1,3 @@
+obj-$(CONFIG_CRYPTO_DEV_PPC4XX) += crypto4xx.o
+crypto4xx-y :=  crypto4xx_core.o crypto4xx_alg.o
+crypto4xx-$(CONFIG_HW_RANDOM_PPC4XX) += crypto4xx_trng.o
diff --git a/drivers/crypto/amcc/crypto4xx_alg.c b/drivers/crypto/amcc/crypto4xx_alg.c
new file mode 100644
index 000000000..1d87deca3
--- /dev/null
+++ b/drivers/crypto/amcc/crypto4xx_alg.c
@@ -0,0 +1,760 @@
+/**
+ * AMCC SoC PPC4xx Crypto Driver
+ *
+ * Copyright (c) 2008 Applied Micro Circuits Corporation.
+ * All rights reserved. James Hsiao <jhsiao@amcc.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * This file implements the Linux crypto algorithms.
+ */
+
+#include <linux/kernel.h>
+#include <linux/interrupt.h>
+#include <linux/spinlock_types.h>
+#include <linux/scatterlist.h>
+#include <linux/crypto.h>
+#include <linux/hash.h>
+#include <crypto/internal/hash.h>
+#include <linux/dma-mapping.h>
+#include <crypto/algapi.h>
+#include <crypto/aead.h>
+#include <crypto/aes.h>
+#include <crypto/gcm.h>
+#include <crypto/sha.h>
+#include <crypto/ctr.h>
+#include <crypto/skcipher.h>
+#include "crypto4xx_reg_def.h"
+#include "crypto4xx_core.h"
+#include "crypto4xx_sa.h"
+
+static void set_dynamic_sa_command_0(struct dynamic_sa_ctl *sa, u32 save_h,
+				     u32 save_iv, u32 ld_h, u32 ld_iv,
+				     u32 hdr_proc, u32 h, u32 c, u32 pad_type,
+				     u32 op_grp, u32 op, u32 dir)
+{
+	sa->sa_command_0.w = 0;
+	sa->sa_command_0.bf.save_hash_state = save_h;
+	sa->sa_command_0.bf.save_iv = save_iv;
+	sa->sa_command_0.bf.load_hash_state = ld_h;
+	sa->sa_command_0.bf.load_iv = ld_iv;
+	sa->sa_command_0.bf.hdr_proc = hdr_proc;
+	sa->sa_command_0.bf.hash_alg = h;
+	sa->sa_command_0.bf.cipher_alg = c;
+	sa->sa_command_0.bf.pad_type = pad_type & 3;
+	sa->sa_command_0.bf.extend_pad = pad_type >> 2;
+	sa->sa_command_0.bf.op_group = op_grp;
+	sa->sa_command_0.bf.opcode = op;
+	sa->sa_command_0.bf.dir = dir;
+}
+
+static void set_dynamic_sa_command_1(struct dynamic_sa_ctl *sa, u32 cm,
+				     u32 hmac_mc, u32 cfb, u32 esn,
+				     u32 sn_mask, u32 mute, u32 cp_pad,
+				     u32 cp_pay, u32 cp_hdr)
+{
+	sa->sa_command_1.w = 0;
+	sa->sa_command_1.bf.crypto_mode31 = (cm & 4) >> 2;
+	sa->sa_command_1.bf.crypto_mode9_8 = cm & 3;
+	sa->sa_command_1.bf.feedback_mode = cfb,
+	sa->sa_command_1.bf.sa_rev = 1;
+	sa->sa_command_1.bf.hmac_muting = hmac_mc;
+	sa->sa_command_1.bf.extended_seq_num = esn;
+	sa->sa_command_1.bf.seq_num_mask = sn_mask;
+	sa->sa_command_1.bf.mutable_bit_proc = mute;
+	sa->sa_command_1.bf.copy_pad = cp_pad;
+	sa->sa_command_1.bf.copy_payload = cp_pay;
+	sa->sa_command_1.bf.copy_hdr = cp_hdr;
+}
+
+static inline int crypto4xx_crypt(struct skcipher_request *req,
+				  const unsigned int ivlen, bool decrypt,
+				  bool check_blocksize)
+{
+	struct crypto_skcipher *cipher = crypto_skcipher_reqtfm(req);
+	struct crypto4xx_ctx *ctx = crypto_skcipher_ctx(cipher);
+	__le32 iv[AES_IV_SIZE];
+
+	if (check_blocksize && !IS_ALIGNED(req->cryptlen, AES_BLOCK_SIZE))
+		return -EINVAL;
+
+	if (ivlen)
+		crypto4xx_memcpy_to_le32(iv, req->iv, ivlen);
+
+	return crypto4xx_build_pd(&req->base, ctx, req->src, req->dst,
+		req->cryptlen, iv, ivlen, decrypt ? ctx->sa_in : ctx->sa_out,
+		ctx->sa_len, 0, NULL);
+}
+
+int crypto4xx_encrypt_noiv_block(struct skcipher_request *req)
+{
+	return crypto4xx_crypt(req, 0, false, true);
+}
+
+int crypto4xx_encrypt_iv_stream(struct skcipher_request *req)
+{
+	return crypto4xx_crypt(req, AES_IV_SIZE, false, false);
+}
+
+int crypto4xx_decrypt_noiv_block(struct skcipher_request *req)
+{
+	return crypto4xx_crypt(req, 0, true, true);
+}
+
+int crypto4xx_decrypt_iv_stream(struct skcipher_request *req)
+{
+	return crypto4xx_crypt(req, AES_IV_SIZE, true, false);
+}
+
+int crypto4xx_encrypt_iv_block(struct skcipher_request *req)
+{
+	return crypto4xx_crypt(req, AES_IV_SIZE, false, true);
+}
+
+int crypto4xx_decrypt_iv_block(struct skcipher_request *req)
+{
+	return crypto4xx_crypt(req, AES_IV_SIZE, true, true);
+}
+
+/**
+ * AES Functions
+ */
+static int crypto4xx_setkey_aes(struct crypto_skcipher *cipher,
+				const u8 *key,
+				unsigned int keylen,
+				unsigned char cm,
+				u8 fb)
+{
+	struct crypto4xx_ctx *ctx = crypto_skcipher_ctx(cipher);
+	struct dynamic_sa_ctl *sa;
+	int    rc;
+
+	if (keylen != AES_KEYSIZE_256 &&
+		keylen != AES_KEYSIZE_192 && keylen != AES_KEYSIZE_128) {
+		crypto_skcipher_set_flags(cipher,
+				CRYPTO_TFM_RES_BAD_KEY_LEN);
+		return -EINVAL;
+	}
+
+	/* Create SA */
+	if (ctx->sa_in || ctx->sa_out)
+		crypto4xx_free_sa(ctx);
+
+	rc = crypto4xx_alloc_sa(ctx, SA_AES128_LEN + (keylen-16) / 4);
+	if (rc)
+		return rc;
+
+	/* Setup SA */
+	sa = ctx->sa_in;
+
+	set_dynamic_sa_command_0(sa, SA_NOT_SAVE_HASH, (cm == CRYPTO_MODE_ECB ?
+				 SA_NOT_SAVE_IV : SA_SAVE_IV),
+				 SA_NOT_LOAD_HASH, (cm == CRYPTO_MODE_ECB ?
+				 SA_LOAD_IV_FROM_SA : SA_LOAD_IV_FROM_STATE),
+				 SA_NO_HEADER_PROC, SA_HASH_ALG_NULL,
+				 SA_CIPHER_ALG_AES, SA_PAD_TYPE_ZERO,
+				 SA_OP_GROUP_BASIC, SA_OPCODE_DECRYPT,
+				 DIR_INBOUND);
+
+	set_dynamic_sa_command_1(sa, cm, SA_HASH_MODE_HASH,
+				 fb, SA_EXTENDED_SN_OFF,
+				 SA_SEQ_MASK_OFF, SA_MC_ENABLE,
+				 SA_NOT_COPY_PAD, SA_NOT_COPY_PAYLOAD,
+				 SA_NOT_COPY_HDR);
+	crypto4xx_memcpy_to_le32(get_dynamic_sa_key_field(sa),
+				 key, keylen);
+	sa->sa_contents.w = SA_AES_CONTENTS | (keylen << 2);
+	sa->sa_command_1.bf.key_len = keylen >> 3;
+
+	memcpy(ctx->sa_out, ctx->sa_in, ctx->sa_len * 4);
+	sa = ctx->sa_out;
+	sa->sa_command_0.bf.dir = DIR_OUTBOUND;
+	/*
+	 * SA_OPCODE_ENCRYPT is the same value as SA_OPCODE_DECRYPT.
+	 * it's the DIR_(IN|OUT)BOUND that matters
+	 */
+	sa->sa_command_0.bf.opcode = SA_OPCODE_ENCRYPT;
+
+	return 0;
+}
+
+int crypto4xx_setkey_aes_cbc(struct crypto_skcipher *cipher,
+			     const u8 *key, unsigned int keylen)
+{
+	return crypto4xx_setkey_aes(cipher, key, keylen, CRYPTO_MODE_CBC,
+				    CRYPTO_FEEDBACK_MODE_NO_FB);
+}
+
+int crypto4xx_setkey_aes_cfb(struct crypto_skcipher *cipher,
+			     const u8 *key, unsigned int keylen)
+{
+	return crypto4xx_setkey_aes(cipher, key, keylen, CRYPTO_MODE_CFB,
+				    CRYPTO_FEEDBACK_MODE_128BIT_CFB);
+}
+
+int crypto4xx_setkey_aes_ecb(struct crypto_skcipher *cipher,
+			     const u8 *key, unsigned int keylen)
+{
+	return crypto4xx_setkey_aes(cipher, key, keylen, CRYPTO_MODE_ECB,
+				    CRYPTO_FEEDBACK_MODE_NO_FB);
+}
+
+int crypto4xx_setkey_aes_ofb(struct crypto_skcipher *cipher,
+			     const u8 *key, unsigned int keylen)
+{
+	return crypto4xx_setkey_aes(cipher, key, keylen, CRYPTO_MODE_OFB,
+				    CRYPTO_FEEDBACK_MODE_64BIT_OFB);
+}
+
+int crypto4xx_setkey_rfc3686(struct crypto_skcipher *cipher,
+			     const u8 *key, unsigned int keylen)
+{
+	struct crypto4xx_ctx *ctx = crypto_skcipher_ctx(cipher);
+	int rc;
+
+	rc = crypto4xx_setkey_aes(cipher, key, keylen - CTR_RFC3686_NONCE_SIZE,
+		CRYPTO_MODE_CTR, CRYPTO_FEEDBACK_MODE_NO_FB);
+	if (rc)
+		return rc;
+
+	ctx->iv_nonce = cpu_to_le32p((u32 *)&key[keylen -
+						 CTR_RFC3686_NONCE_SIZE]);
+
+	return 0;
+}
+
+int crypto4xx_rfc3686_encrypt(struct skcipher_request *req)
+{
+	struct crypto_skcipher *cipher = crypto_skcipher_reqtfm(req);
+	struct crypto4xx_ctx *ctx = crypto_skcipher_ctx(cipher);
+	__le32 iv[AES_IV_SIZE / 4] = {
+		ctx->iv_nonce,
+		cpu_to_le32p((u32 *) req->iv),
+		cpu_to_le32p((u32 *) (req->iv + 4)),
+		cpu_to_le32(1) };
+
+	return crypto4xx_build_pd(&req->base, ctx, req->src, req->dst,
+				  req->cryptlen, iv, AES_IV_SIZE,
+				  ctx->sa_out, ctx->sa_len, 0, NULL);
+}
+
+int crypto4xx_rfc3686_decrypt(struct skcipher_request *req)
+{
+	struct crypto_skcipher *cipher = crypto_skcipher_reqtfm(req);
+	struct crypto4xx_ctx *ctx = crypto_skcipher_ctx(cipher);
+	__le32 iv[AES_IV_SIZE / 4] = {
+		ctx->iv_nonce,
+		cpu_to_le32p((u32 *) req->iv),
+		cpu_to_le32p((u32 *) (req->iv + 4)),
+		cpu_to_le32(1) };
+
+	return crypto4xx_build_pd(&req->base, ctx, req->src, req->dst,
+				  req->cryptlen, iv, AES_IV_SIZE,
+				  ctx->sa_out, ctx->sa_len, 0, NULL);
+}
+
+static int
+crypto4xx_ctr_crypt(struct skcipher_request *req, bool encrypt)
+{
+	struct crypto_skcipher *cipher = crypto_skcipher_reqtfm(req);
+	struct crypto4xx_ctx *ctx = crypto_skcipher_ctx(cipher);
+	size_t iv_len = crypto_skcipher_ivsize(cipher);
+	unsigned int counter = be32_to_cpup((__be32 *)(req->iv + iv_len - 4));
+	unsigned int nblks = ALIGN(req->cryptlen, AES_BLOCK_SIZE) /
+			AES_BLOCK_SIZE;
+
+	/*
+	 * The hardware uses only the last 32-bits as the counter while the
+	 * kernel tests (aes_ctr_enc_tv_template[4] for example) expect that
+	 * the whole IV is a counter.  So fallback if the counter is going to
+	 * overlow.
+	 */
+	if (counter + nblks < counter) {
+		struct skcipher_request *subreq = skcipher_request_ctx(req);
+		int ret;
+
+		skcipher_request_set_tfm(subreq, ctx->sw_cipher.cipher);
+		skcipher_request_set_callback(subreq, req->base.flags,
+			NULL, NULL);
+		skcipher_request_set_crypt(subreq, req->src, req->dst,
+			req->cryptlen, req->iv);
+		ret = encrypt ? crypto_skcipher_encrypt(subreq)
+			: crypto_skcipher_decrypt(subreq);
+		skcipher_request_zero(subreq);
+		return ret;
+	}
+
+	return encrypt ? crypto4xx_encrypt_iv_stream(req)
+		       : crypto4xx_decrypt_iv_stream(req);
+}
+
+static int crypto4xx_sk_setup_fallback(struct crypto4xx_ctx *ctx,
+				       struct crypto_skcipher *cipher,
+				       const u8 *key,
+				       unsigned int keylen)
+{
+	int rc;
+
+	crypto_skcipher_clear_flags(ctx->sw_cipher.cipher,
+				    CRYPTO_TFM_REQ_MASK);
+	crypto_skcipher_set_flags(ctx->sw_cipher.cipher,
+		crypto_skcipher_get_flags(cipher) & CRYPTO_TFM_REQ_MASK);
+	rc = crypto_skcipher_setkey(ctx->sw_cipher.cipher, key, keylen);
+	crypto_skcipher_clear_flags(cipher, CRYPTO_TFM_RES_MASK);
+	crypto_skcipher_set_flags(cipher,
+		crypto_skcipher_get_flags(ctx->sw_cipher.cipher) &
+			CRYPTO_TFM_RES_MASK);
+
+	return rc;
+}
+
+int crypto4xx_setkey_aes_ctr(struct crypto_skcipher *cipher,
+			     const u8 *key, unsigned int keylen)
+{
+	struct crypto4xx_ctx *ctx = crypto_skcipher_ctx(cipher);
+	int rc;
+
+	rc = crypto4xx_sk_setup_fallback(ctx, cipher, key, keylen);
+	if (rc)
+		return rc;
+
+	return crypto4xx_setkey_aes(cipher, key, keylen,
+		CRYPTO_MODE_CTR, CRYPTO_FEEDBACK_MODE_NO_FB);
+}
+
+int crypto4xx_encrypt_ctr(struct skcipher_request *req)
+{
+	return crypto4xx_ctr_crypt(req, true);
+}
+
+int crypto4xx_decrypt_ctr(struct skcipher_request *req)
+{
+	return crypto4xx_ctr_crypt(req, false);
+}
+
+static inline bool crypto4xx_aead_need_fallback(struct aead_request *req,
+						unsigned int len,
+						bool is_ccm, bool decrypt)
+{
+	struct crypto_aead *aead = crypto_aead_reqtfm(req);
+
+	/* authsize has to be a multiple of 4 */
+	if (aead->authsize & 3)
+		return true;
+
+	/*
+	 * hardware does not handle cases where plaintext
+	 * is less than a block.
+	 */
+	if (len < AES_BLOCK_SIZE)
+		return true;
+
+	/* assoc len needs to be a multiple of 4 and <= 1020 */
+	if (req->assoclen & 0x3 || req->assoclen > 1020)
+		return true;
+
+	/* CCM supports only counter field length of 2 and 4 bytes */
+	if (is_ccm && !(req->iv[0] == 1 || req->iv[0] == 3))
+		return true;
+
+	return false;
+}
+
+static int crypto4xx_aead_fallback(struct aead_request *req,
+	struct crypto4xx_ctx *ctx, bool do_decrypt)
+{
+	struct aead_request *subreq = aead_request_ctx(req);
+
+	aead_request_set_tfm(subreq, ctx->sw_cipher.aead);
+	aead_request_set_callback(subreq, req->base.flags,
+				  req->base.complete, req->base.data);
+	aead_request_set_crypt(subreq, req->src, req->dst, req->cryptlen,
+			       req->iv);
+	aead_request_set_ad(subreq, req->assoclen);
+	return do_decrypt ? crypto_aead_decrypt(subreq) :
+			    crypto_aead_encrypt(subreq);
+}
+
+static int crypto4xx_aead_setup_fallback(struct crypto4xx_ctx *ctx,
+					 struct crypto_aead *cipher,
+					 const u8 *key,
+					 unsigned int keylen)
+{
+	int rc;
+
+	crypto_aead_clear_flags(ctx->sw_cipher.aead, CRYPTO_TFM_REQ_MASK);
+	crypto_aead_set_flags(ctx->sw_cipher.aead,
+		crypto_aead_get_flags(cipher) & CRYPTO_TFM_REQ_MASK);
+	rc = crypto_aead_setkey(ctx->sw_cipher.aead, key, keylen);
+	crypto_aead_clear_flags(cipher, CRYPTO_TFM_RES_MASK);
+	crypto_aead_set_flags(cipher,
+		crypto_aead_get_flags(ctx->sw_cipher.aead) &
+			CRYPTO_TFM_RES_MASK);
+
+	return rc;
+}
+
+/**
+ * AES-CCM Functions
+ */
+
+int crypto4xx_setkey_aes_ccm(struct crypto_aead *cipher, const u8 *key,
+			     unsigned int keylen)
+{
+	struct crypto_tfm *tfm = crypto_aead_tfm(cipher);
+	struct crypto4xx_ctx *ctx = crypto_tfm_ctx(tfm);
+	struct dynamic_sa_ctl *sa;
+	int rc = 0;
+
+	rc = crypto4xx_aead_setup_fallback(ctx, cipher, key, keylen);
+	if (rc)
+		return rc;
+
+	if (ctx->sa_in || ctx->sa_out)
+		crypto4xx_free_sa(ctx);
+
+	rc = crypto4xx_alloc_sa(ctx, SA_AES128_CCM_LEN + (keylen - 16) / 4);
+	if (rc)
+		return rc;
+
+	/* Setup SA */
+	sa = (struct dynamic_sa_ctl *) ctx->sa_in;
+	sa->sa_contents.w = SA_AES_CCM_CONTENTS | (keylen << 2);
+
+	set_dynamic_sa_command_0(sa, SA_SAVE_HASH, SA_NOT_SAVE_IV,
+				 SA_LOAD_HASH_FROM_SA, SA_LOAD_IV_FROM_STATE,
+				 SA_NO_HEADER_PROC, SA_HASH_ALG_CBC_MAC,
+				 SA_CIPHER_ALG_AES,
+				 SA_PAD_TYPE_ZERO, SA_OP_GROUP_BASIC,
+				 SA_OPCODE_HASH_DECRYPT, DIR_INBOUND);
+
+	set_dynamic_sa_command_1(sa, CRYPTO_MODE_CTR, SA_HASH_MODE_HASH,
+				 CRYPTO_FEEDBACK_MODE_NO_FB, SA_EXTENDED_SN_OFF,
+				 SA_SEQ_MASK_OFF, SA_MC_ENABLE,
+				 SA_NOT_COPY_PAD, SA_COPY_PAYLOAD,
+				 SA_NOT_COPY_HDR);
+
+	sa->sa_command_1.bf.key_len = keylen >> 3;
+
+	crypto4xx_memcpy_to_le32(get_dynamic_sa_key_field(sa), key, keylen);
+
+	memcpy(ctx->sa_out, ctx->sa_in, ctx->sa_len * 4);
+	sa = (struct dynamic_sa_ctl *) ctx->sa_out;
+
+	set_dynamic_sa_command_0(sa, SA_SAVE_HASH, SA_NOT_SAVE_IV,
+				 SA_LOAD_HASH_FROM_SA, SA_LOAD_IV_FROM_STATE,
+				 SA_NO_HEADER_PROC, SA_HASH_ALG_CBC_MAC,
+				 SA_CIPHER_ALG_AES,
+				 SA_PAD_TYPE_ZERO, SA_OP_GROUP_BASIC,
+				 SA_OPCODE_ENCRYPT_HASH, DIR_OUTBOUND);
+
+	set_dynamic_sa_command_1(sa, CRYPTO_MODE_CTR, SA_HASH_MODE_HASH,
+				 CRYPTO_FEEDBACK_MODE_NO_FB, SA_EXTENDED_SN_OFF,
+				 SA_SEQ_MASK_OFF, SA_MC_ENABLE,
+				 SA_COPY_PAD, SA_COPY_PAYLOAD,
+				 SA_NOT_COPY_HDR);
+
+	sa->sa_command_1.bf.key_len = keylen >> 3;
+	return 0;
+}
+
+static int crypto4xx_crypt_aes_ccm(struct aead_request *req, bool decrypt)
+{
+	struct crypto4xx_ctx *ctx  = crypto_tfm_ctx(req->base.tfm);
+	struct crypto4xx_aead_reqctx *rctx = aead_request_ctx(req);
+	struct crypto_aead *aead = crypto_aead_reqtfm(req);
+	__le32 iv[16];
+	u32 tmp_sa[SA_AES128_CCM_LEN + 4];
+	struct dynamic_sa_ctl *sa = (struct dynamic_sa_ctl *)tmp_sa;
+	unsigned int len = req->cryptlen;
+
+	if (decrypt)
+		len -= crypto_aead_authsize(aead);
+
+	if (crypto4xx_aead_need_fallback(req, len, true, decrypt))
+		return crypto4xx_aead_fallback(req, ctx, decrypt);
+
+	memcpy(tmp_sa, decrypt ? ctx->sa_in : ctx->sa_out, ctx->sa_len * 4);
+	sa->sa_command_0.bf.digest_len = crypto_aead_authsize(aead) >> 2;
+
+	if (req->iv[0] == 1) {
+		/* CRYPTO_MODE_AES_ICM */
+		sa->sa_command_1.bf.crypto_mode9_8 = 1;
+	}
+
+	iv[3] = cpu_to_le32(0);
+	crypto4xx_memcpy_to_le32(iv, req->iv, 16 - (req->iv[0] + 1));
+
+	return crypto4xx_build_pd(&req->base, ctx, req->src, req->dst,
+				  len, iv, sizeof(iv),
+				  sa, ctx->sa_len, req->assoclen, rctx->dst);
+}
+
+int crypto4xx_encrypt_aes_ccm(struct aead_request *req)
+{
+	return crypto4xx_crypt_aes_ccm(req, false);
+}
+
+int crypto4xx_decrypt_aes_ccm(struct aead_request *req)
+{
+	return crypto4xx_crypt_aes_ccm(req, true);
+}
+
+int crypto4xx_setauthsize_aead(struct crypto_aead *cipher,
+			       unsigned int authsize)
+{
+	struct crypto_tfm *tfm = crypto_aead_tfm(cipher);
+	struct crypto4xx_ctx *ctx = crypto_tfm_ctx(tfm);
+
+	return crypto_aead_setauthsize(ctx->sw_cipher.aead, authsize);
+}
+
+/**
+ * AES-GCM Functions
+ */
+
+static int crypto4xx_aes_gcm_validate_keylen(unsigned int keylen)
+{
+	switch (keylen) {
+	case 16:
+	case 24:
+	case 32:
+		return 0;
+	default:
+		return -EINVAL;
+	}
+}
+
+static int crypto4xx_compute_gcm_hash_key_sw(__le32 *hash_start, const u8 *key,
+					     unsigned int keylen)
+{
+	struct crypto_cipher *aes_tfm = NULL;
+	uint8_t src[16] = { 0 };
+	int rc = 0;
+
+	aes_tfm = crypto_alloc_cipher("aes", 0, CRYPTO_ALG_ASYNC |
+				      CRYPTO_ALG_NEED_FALLBACK);
+	if (IS_ERR(aes_tfm)) {
+		rc = PTR_ERR(aes_tfm);
+		pr_warn("could not load aes cipher driver: %d\n", rc);
+		return rc;
+	}
+
+	rc = crypto_cipher_setkey(aes_tfm, key, keylen);
+	if (rc) {
+		pr_err("setkey() failed: %d\n", rc);
+		goto out;
+	}
+
+	crypto_cipher_encrypt_one(aes_tfm, src, src);
+	crypto4xx_memcpy_to_le32(hash_start, src, 16);
+out:
+	crypto_free_cipher(aes_tfm);
+	return rc;
+}
+
+int crypto4xx_setkey_aes_gcm(struct crypto_aead *cipher,
+			     const u8 *key, unsigned int keylen)
+{
+	struct crypto_tfm *tfm = crypto_aead_tfm(cipher);
+	struct crypto4xx_ctx *ctx = crypto_tfm_ctx(tfm);
+	struct dynamic_sa_ctl *sa;
+	int    rc = 0;
+
+	if (crypto4xx_aes_gcm_validate_keylen(keylen) != 0) {
+		crypto_aead_set_flags(cipher, CRYPTO_TFM_RES_BAD_KEY_LEN);
+		return -EINVAL;
+	}
+
+	rc = crypto4xx_aead_setup_fallback(ctx, cipher, key, keylen);
+	if (rc)
+		return rc;
+
+	if (ctx->sa_in || ctx->sa_out)
+		crypto4xx_free_sa(ctx);
+
+	rc = crypto4xx_alloc_sa(ctx, SA_AES128_GCM_LEN + (keylen - 16) / 4);
+	if (rc)
+		return rc;
+
+	sa  = (struct dynamic_sa_ctl *) ctx->sa_in;
+
+	sa->sa_contents.w = SA_AES_GCM_CONTENTS | (keylen << 2);
+	set_dynamic_sa_command_0(sa, SA_SAVE_HASH, SA_NOT_SAVE_IV,
+				 SA_LOAD_HASH_FROM_SA, SA_LOAD_IV_FROM_STATE,
+				 SA_NO_HEADER_PROC, SA_HASH_ALG_GHASH,
+				 SA_CIPHER_ALG_AES, SA_PAD_TYPE_ZERO,
+				 SA_OP_GROUP_BASIC, SA_OPCODE_HASH_DECRYPT,
+				 DIR_INBOUND);
+	set_dynamic_sa_command_1(sa, CRYPTO_MODE_CTR, SA_HASH_MODE_HASH,
+				 CRYPTO_FEEDBACK_MODE_NO_FB, SA_EXTENDED_SN_OFF,
+				 SA_SEQ_MASK_ON, SA_MC_DISABLE,
+				 SA_NOT_COPY_PAD, SA_COPY_PAYLOAD,
+				 SA_NOT_COPY_HDR);
+
+	sa->sa_command_1.bf.key_len = keylen >> 3;
+
+	crypto4xx_memcpy_to_le32(get_dynamic_sa_key_field(sa),
+				 key, keylen);
+
+	rc = crypto4xx_compute_gcm_hash_key_sw(get_dynamic_sa_inner_digest(sa),
+		key, keylen);
+	if (rc) {
+		pr_err("GCM hash key setting failed = %d\n", rc);
+		goto err;
+	}
+
+	memcpy(ctx->sa_out, ctx->sa_in, ctx->sa_len * 4);
+	sa = (struct dynamic_sa_ctl *) ctx->sa_out;
+	sa->sa_command_0.bf.dir = DIR_OUTBOUND;
+	sa->sa_command_0.bf.opcode = SA_OPCODE_ENCRYPT_HASH;
+
+	return 0;
+err:
+	crypto4xx_free_sa(ctx);
+	return rc;
+}
+
+static inline int crypto4xx_crypt_aes_gcm(struct aead_request *req,
+					  bool decrypt)
+{
+	struct crypto4xx_ctx *ctx = crypto_tfm_ctx(req->base.tfm);
+	struct crypto4xx_aead_reqctx *rctx = aead_request_ctx(req);
+	__le32 iv[4];
+	unsigned int len = req->cryptlen;
+
+	if (decrypt)
+		len -= crypto_aead_authsize(crypto_aead_reqtfm(req));
+
+	if (crypto4xx_aead_need_fallback(req, len, false, decrypt))
+		return crypto4xx_aead_fallback(req, ctx, decrypt);
+
+	crypto4xx_memcpy_to_le32(iv, req->iv, GCM_AES_IV_SIZE);
+	iv[3] = cpu_to_le32(1);
+
+	return crypto4xx_build_pd(&req->base, ctx, req->src, req->dst,
+				  len, iv, sizeof(iv),
+				  decrypt ? ctx->sa_in : ctx->sa_out,
+				  ctx->sa_len, req->assoclen, rctx->dst);
+}
+
+int crypto4xx_encrypt_aes_gcm(struct aead_request *req)
+{
+	return crypto4xx_crypt_aes_gcm(req, false);
+}
+
+int crypto4xx_decrypt_aes_gcm(struct aead_request *req)
+{
+	return crypto4xx_crypt_aes_gcm(req, true);
+}
+
+/**
+ * HASH SHA1 Functions
+ */
+static int crypto4xx_hash_alg_init(struct crypto_tfm *tfm,
+				   unsigned int sa_len,
+				   unsigned char ha,
+				   unsigned char hm)
+{
+	struct crypto_alg *alg = tfm->__crt_alg;
+	struct crypto4xx_alg *my_alg;
+	struct crypto4xx_ctx *ctx = crypto_tfm_ctx(tfm);
+	struct dynamic_sa_hash160 *sa;
+	int rc;
+
+	my_alg = container_of(__crypto_ahash_alg(alg), struct crypto4xx_alg,
+			      alg.u.hash);
+	ctx->dev   = my_alg->dev;
+
+	/* Create SA */
+	if (ctx->sa_in || ctx->sa_out)
+		crypto4xx_free_sa(ctx);
+
+	rc = crypto4xx_alloc_sa(ctx, sa_len);
+	if (rc)
+		return rc;
+
+	crypto_ahash_set_reqsize(__crypto_ahash_cast(tfm),
+				 sizeof(struct crypto4xx_ctx));
+	sa = (struct dynamic_sa_hash160 *)ctx->sa_in;
+	set_dynamic_sa_command_0(&sa->ctrl, SA_SAVE_HASH, SA_NOT_SAVE_IV,
+				 SA_NOT_LOAD_HASH, SA_LOAD_IV_FROM_SA,
+				 SA_NO_HEADER_PROC, ha, SA_CIPHER_ALG_NULL,
+				 SA_PAD_TYPE_ZERO, SA_OP_GROUP_BASIC,
+				 SA_OPCODE_HASH, DIR_INBOUND);
+	set_dynamic_sa_command_1(&sa->ctrl, 0, SA_HASH_MODE_HASH,
+				 CRYPTO_FEEDBACK_MODE_NO_FB, SA_EXTENDED_SN_OFF,
+				 SA_SEQ_MASK_OFF, SA_MC_ENABLE,
+				 SA_NOT_COPY_PAD, SA_NOT_COPY_PAYLOAD,
+				 SA_NOT_COPY_HDR);
+	/* Need to zero hash digest in SA */
+	memset(sa->inner_digest, 0, sizeof(sa->inner_digest));
+	memset(sa->outer_digest, 0, sizeof(sa->outer_digest));
+
+	return 0;
+}
+
+int crypto4xx_hash_init(struct ahash_request *req)
+{
+	struct crypto4xx_ctx *ctx = crypto_tfm_ctx(req->base.tfm);
+	int ds;
+	struct dynamic_sa_ctl *sa;
+
+	sa = ctx->sa_in;
+	ds = crypto_ahash_digestsize(
+			__crypto_ahash_cast(req->base.tfm));
+	sa->sa_command_0.bf.digest_len = ds >> 2;
+	sa->sa_command_0.bf.load_hash_state = SA_LOAD_HASH_FROM_SA;
+
+	return 0;
+}
+
+int crypto4xx_hash_update(struct ahash_request *req)
+{
+	struct crypto_ahash *ahash = crypto_ahash_reqtfm(req);
+	struct crypto4xx_ctx *ctx = crypto_tfm_ctx(req->base.tfm);
+	struct scatterlist dst;
+	unsigned int ds = crypto_ahash_digestsize(ahash);
+
+	sg_init_one(&dst, req->result, ds);
+
+	return crypto4xx_build_pd(&req->base, ctx, req->src, &dst,
+				  req->nbytes, NULL, 0, ctx->sa_in,
+				  ctx->sa_len, 0, NULL);
+}
+
+int crypto4xx_hash_final(struct ahash_request *req)
+{
+	return 0;
+}
+
+int crypto4xx_hash_digest(struct ahash_request *req)
+{
+	struct crypto_ahash *ahash = crypto_ahash_reqtfm(req);
+	struct crypto4xx_ctx *ctx = crypto_tfm_ctx(req->base.tfm);
+	struct scatterlist dst;
+	unsigned int ds = crypto_ahash_digestsize(ahash);
+
+	sg_init_one(&dst, req->result, ds);
+
+	return crypto4xx_build_pd(&req->base, ctx, req->src, &dst,
+				  req->nbytes, NULL, 0, ctx->sa_in,
+				  ctx->sa_len, 0, NULL);
+}
+
+/**
+ * SHA1 Algorithm
+ */
+int crypto4xx_sha1_alg_init(struct crypto_tfm *tfm)
+{
+	return crypto4xx_hash_alg_init(tfm, SA_HASH160_LEN, SA_HASH_ALG_SHA1,
+				       SA_HASH_MODE_HASH);
+}
diff --git a/drivers/crypto/amcc/crypto4xx_core.c b/drivers/crypto/amcc/crypto4xx_core.c
new file mode 100644
index 000000000..cd00afb57
--- /dev/null
+++ b/drivers/crypto/amcc/crypto4xx_core.c
@@ -0,0 +1,1474 @@
+/**
+ * AMCC SoC PPC4xx Crypto Driver
+ *
+ * Copyright (c) 2008 Applied Micro Circuits Corporation.
+ * All rights reserved. James Hsiao <jhsiao@amcc.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * This file implements AMCC crypto offload Linux device driver for use with
+ * Linux CryptoAPI.
+ */
+
+#include <linux/kernel.h>
+#include <linux/interrupt.h>
+#include <linux/spinlock_types.h>
+#include <linux/random.h>
+#include <linux/scatterlist.h>
+#include <linux/crypto.h>
+#include <linux/dma-mapping.h>
+#include <linux/platform_device.h>
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/of_address.h>
+#include <linux/of_irq.h>
+#include <linux/of_platform.h>
+#include <linux/slab.h>
+#include <asm/dcr.h>
+#include <asm/dcr-regs.h>
+#include <asm/cacheflush.h>
+#include <crypto/aead.h>
+#include <crypto/aes.h>
+#include <crypto/ctr.h>
+#include <crypto/gcm.h>
+#include <crypto/sha.h>
+#include <crypto/scatterwalk.h>
+#include <crypto/skcipher.h>
+#include <crypto/internal/aead.h>
+#include <crypto/internal/skcipher.h>
+#include "crypto4xx_reg_def.h"
+#include "crypto4xx_core.h"
+#include "crypto4xx_sa.h"
+#include "crypto4xx_trng.h"
+
+#define PPC4XX_SEC_VERSION_STR			"0.5"
+
+/**
+ * PPC4xx Crypto Engine Initialization Routine
+ */
+static void crypto4xx_hw_init(struct crypto4xx_device *dev)
+{
+	union ce_ring_size ring_size;
+	union ce_ring_control ring_ctrl;
+	union ce_part_ring_size part_ring_size;
+	union ce_io_threshold io_threshold;
+	u32 rand_num;
+	union ce_pe_dma_cfg pe_dma_cfg;
+	u32 device_ctrl;
+
+	writel(PPC4XX_BYTE_ORDER, dev->ce_base + CRYPTO4XX_BYTE_ORDER_CFG);
+	/* setup pe dma, include reset sg, pdr and pe, then release reset */
+	pe_dma_cfg.w = 0;
+	pe_dma_cfg.bf.bo_sgpd_en = 1;
+	pe_dma_cfg.bf.bo_data_en = 0;
+	pe_dma_cfg.bf.bo_sa_en = 1;
+	pe_dma_cfg.bf.bo_pd_en = 1;
+	pe_dma_cfg.bf.dynamic_sa_en = 1;
+	pe_dma_cfg.bf.reset_sg = 1;
+	pe_dma_cfg.bf.reset_pdr = 1;
+	pe_dma_cfg.bf.reset_pe = 1;
+	writel(pe_dma_cfg.w, dev->ce_base + CRYPTO4XX_PE_DMA_CFG);
+	/* un reset pe,sg and pdr */
+	pe_dma_cfg.bf.pe_mode = 0;
+	pe_dma_cfg.bf.reset_sg = 0;
+	pe_dma_cfg.bf.reset_pdr = 0;
+	pe_dma_cfg.bf.reset_pe = 0;
+	pe_dma_cfg.bf.bo_td_en = 0;
+	writel(pe_dma_cfg.w, dev->ce_base + CRYPTO4XX_PE_DMA_CFG);
+	writel(dev->pdr_pa, dev->ce_base + CRYPTO4XX_PDR_BASE);
+	writel(dev->pdr_pa, dev->ce_base + CRYPTO4XX_RDR_BASE);
+	writel(PPC4XX_PRNG_CTRL_AUTO_EN, dev->ce_base + CRYPTO4XX_PRNG_CTRL);
+	get_random_bytes(&rand_num, sizeof(rand_num));
+	writel(rand_num, dev->ce_base + CRYPTO4XX_PRNG_SEED_L);
+	get_random_bytes(&rand_num, sizeof(rand_num));
+	writel(rand_num, dev->ce_base + CRYPTO4XX_PRNG_SEED_H);
+	ring_size.w = 0;
+	ring_size.bf.ring_offset = PPC4XX_PD_SIZE;
+	ring_size.bf.ring_size   = PPC4XX_NUM_PD;
+	writel(ring_size.w, dev->ce_base + CRYPTO4XX_RING_SIZE);
+	ring_ctrl.w = 0;
+	writel(ring_ctrl.w, dev->ce_base + CRYPTO4XX_RING_CTRL);
+	device_ctrl = readl(dev->ce_base + CRYPTO4XX_DEVICE_CTRL);
+	device_ctrl |= PPC4XX_DC_3DES_EN;
+	writel(device_ctrl, dev->ce_base + CRYPTO4XX_DEVICE_CTRL);
+	writel(dev->gdr_pa, dev->ce_base + CRYPTO4XX_GATH_RING_BASE);
+	writel(dev->sdr_pa, dev->ce_base + CRYPTO4XX_SCAT_RING_BASE);
+	part_ring_size.w = 0;
+	part_ring_size.bf.sdr_size = PPC4XX_SDR_SIZE;
+	part_ring_size.bf.gdr_size = PPC4XX_GDR_SIZE;
+	writel(part_ring_size.w, dev->ce_base + CRYPTO4XX_PART_RING_SIZE);
+	writel(PPC4XX_SD_BUFFER_SIZE, dev->ce_base + CRYPTO4XX_PART_RING_CFG);
+	io_threshold.w = 0;
+	io_threshold.bf.output_threshold = PPC4XX_OUTPUT_THRESHOLD;
+	io_threshold.bf.input_threshold  = PPC4XX_INPUT_THRESHOLD;
+	writel(io_threshold.w, dev->ce_base + CRYPTO4XX_IO_THRESHOLD);
+	writel(0, dev->ce_base + CRYPTO4XX_PDR_BASE_UADDR);
+	writel(0, dev->ce_base + CRYPTO4XX_RDR_BASE_UADDR);
+	writel(0, dev->ce_base + CRYPTO4XX_PKT_SRC_UADDR);
+	writel(0, dev->ce_base + CRYPTO4XX_PKT_DEST_UADDR);
+	writel(0, dev->ce_base + CRYPTO4XX_SA_UADDR);
+	writel(0, dev->ce_base + CRYPTO4XX_GATH_RING_BASE_UADDR);
+	writel(0, dev->ce_base + CRYPTO4XX_SCAT_RING_BASE_UADDR);
+	/* un reset pe,sg and pdr */
+	pe_dma_cfg.bf.pe_mode = 1;
+	pe_dma_cfg.bf.reset_sg = 0;
+	pe_dma_cfg.bf.reset_pdr = 0;
+	pe_dma_cfg.bf.reset_pe = 0;
+	pe_dma_cfg.bf.bo_td_en = 0;
+	writel(pe_dma_cfg.w, dev->ce_base + CRYPTO4XX_PE_DMA_CFG);
+	/*clear all pending interrupt*/
+	writel(PPC4XX_INTERRUPT_CLR, dev->ce_base + CRYPTO4XX_INT_CLR);
+	writel(PPC4XX_INT_DESCR_CNT, dev->ce_base + CRYPTO4XX_INT_DESCR_CNT);
+	writel(PPC4XX_INT_DESCR_CNT, dev->ce_base + CRYPTO4XX_INT_DESCR_CNT);
+	writel(PPC4XX_INT_CFG, dev->ce_base + CRYPTO4XX_INT_CFG);
+	if (dev->is_revb) {
+		writel(PPC4XX_INT_TIMEOUT_CNT_REVB << 10,
+		       dev->ce_base + CRYPTO4XX_INT_TIMEOUT_CNT);
+		writel(PPC4XX_PD_DONE_INT | PPC4XX_TMO_ERR_INT,
+		       dev->ce_base + CRYPTO4XX_INT_EN);
+	} else {
+		writel(PPC4XX_PD_DONE_INT, dev->ce_base + CRYPTO4XX_INT_EN);
+	}
+}
+
+int crypto4xx_alloc_sa(struct crypto4xx_ctx *ctx, u32 size)
+{
+	ctx->sa_in = kcalloc(size, 4, GFP_ATOMIC);
+	if (ctx->sa_in == NULL)
+		return -ENOMEM;
+
+	ctx->sa_out = kcalloc(size, 4, GFP_ATOMIC);
+	if (ctx->sa_out == NULL) {
+		kfree(ctx->sa_in);
+		ctx->sa_in = NULL;
+		return -ENOMEM;
+	}
+
+	ctx->sa_len = size;
+
+	return 0;
+}
+
+void crypto4xx_free_sa(struct crypto4xx_ctx *ctx)
+{
+	kfree(ctx->sa_in);
+	ctx->sa_in = NULL;
+	kfree(ctx->sa_out);
+	ctx->sa_out = NULL;
+	ctx->sa_len = 0;
+}
+
+/**
+ * alloc memory for the gather ring
+ * no need to alloc buf for the ring
+ * gdr_tail, gdr_head and gdr_count are initialized by this function
+ */
+static u32 crypto4xx_build_pdr(struct crypto4xx_device *dev)
+{
+	int i;
+	dev->pdr = dma_alloc_coherent(dev->core_dev->device,
+				      sizeof(struct ce_pd) * PPC4XX_NUM_PD,
+				      &dev->pdr_pa, GFP_ATOMIC);
+	if (!dev->pdr)
+		return -ENOMEM;
+
+	dev->pdr_uinfo = kcalloc(PPC4XX_NUM_PD, sizeof(struct pd_uinfo),
+				 GFP_KERNEL);
+	if (!dev->pdr_uinfo) {
+		dma_free_coherent(dev->core_dev->device,
+				  sizeof(struct ce_pd) * PPC4XX_NUM_PD,
+				  dev->pdr,
+				  dev->pdr_pa);
+		return -ENOMEM;
+	}
+	memset(dev->pdr, 0, sizeof(struct ce_pd) * PPC4XX_NUM_PD);
+	dev->shadow_sa_pool = dma_alloc_coherent(dev->core_dev->device,
+				   sizeof(union shadow_sa_buf) * PPC4XX_NUM_PD,
+				   &dev->shadow_sa_pool_pa,
+				   GFP_ATOMIC);
+	if (!dev->shadow_sa_pool)
+		return -ENOMEM;
+
+	dev->shadow_sr_pool = dma_alloc_coherent(dev->core_dev->device,
+			 sizeof(struct sa_state_record) * PPC4XX_NUM_PD,
+			 &dev->shadow_sr_pool_pa, GFP_ATOMIC);
+	if (!dev->shadow_sr_pool)
+		return -ENOMEM;
+	for (i = 0; i < PPC4XX_NUM_PD; i++) {
+		struct ce_pd *pd = &dev->pdr[i];
+		struct pd_uinfo *pd_uinfo = &dev->pdr_uinfo[i];
+
+		pd->sa = dev->shadow_sa_pool_pa +
+			sizeof(union shadow_sa_buf) * i;
+
+		/* alloc 256 bytes which is enough for any kind of dynamic sa */
+		pd_uinfo->sa_va = &dev->shadow_sa_pool[i].sa;
+
+		/* alloc state record */
+		pd_uinfo->sr_va = &dev->shadow_sr_pool[i];
+		pd_uinfo->sr_pa = dev->shadow_sr_pool_pa +
+		    sizeof(struct sa_state_record) * i;
+	}
+
+	return 0;
+}
+
+static void crypto4xx_destroy_pdr(struct crypto4xx_device *dev)
+{
+	if (dev->pdr)
+		dma_free_coherent(dev->core_dev->device,
+				  sizeof(struct ce_pd) * PPC4XX_NUM_PD,
+				  dev->pdr, dev->pdr_pa);
+
+	if (dev->shadow_sa_pool)
+		dma_free_coherent(dev->core_dev->device,
+			sizeof(union shadow_sa_buf) * PPC4XX_NUM_PD,
+			dev->shadow_sa_pool, dev->shadow_sa_pool_pa);
+
+	if (dev->shadow_sr_pool)
+		dma_free_coherent(dev->core_dev->device,
+			sizeof(struct sa_state_record) * PPC4XX_NUM_PD,
+			dev->shadow_sr_pool, dev->shadow_sr_pool_pa);
+
+	kfree(dev->pdr_uinfo);
+}
+
+static u32 crypto4xx_get_pd_from_pdr_nolock(struct crypto4xx_device *dev)
+{
+	u32 retval;
+	u32 tmp;
+
+	retval = dev->pdr_head;
+	tmp = (dev->pdr_head + 1) % PPC4XX_NUM_PD;
+
+	if (tmp == dev->pdr_tail)
+		return ERING_WAS_FULL;
+
+	dev->pdr_head = tmp;
+
+	return retval;
+}
+
+static u32 crypto4xx_put_pd_to_pdr(struct crypto4xx_device *dev, u32 idx)
+{
+	struct pd_uinfo *pd_uinfo = &dev->pdr_uinfo[idx];
+	u32 tail;
+	unsigned long flags;
+
+	spin_lock_irqsave(&dev->core_dev->lock, flags);
+	pd_uinfo->state = PD_ENTRY_FREE;
+
+	if (dev->pdr_tail != PPC4XX_LAST_PD)
+		dev->pdr_tail++;
+	else
+		dev->pdr_tail = 0;
+	tail = dev->pdr_tail;
+	spin_unlock_irqrestore(&dev->core_dev->lock, flags);
+
+	return tail;
+}
+
+/**
+ * alloc memory for the gather ring
+ * no need to alloc buf for the ring
+ * gdr_tail, gdr_head and gdr_count are initialized by this function
+ */
+static u32 crypto4xx_build_gdr(struct crypto4xx_device *dev)
+{
+	dev->gdr = dma_zalloc_coherent(dev->core_dev->device,
+				       sizeof(struct ce_gd) * PPC4XX_NUM_GD,
+				       &dev->gdr_pa, GFP_ATOMIC);
+	if (!dev->gdr)
+		return -ENOMEM;
+
+	return 0;
+}
+
+static inline void crypto4xx_destroy_gdr(struct crypto4xx_device *dev)
+{
+	dma_free_coherent(dev->core_dev->device,
+			  sizeof(struct ce_gd) * PPC4XX_NUM_GD,
+			  dev->gdr, dev->gdr_pa);
+}
+
+/*
+ * when this function is called.
+ * preemption or interrupt must be disabled
+ */
+static u32 crypto4xx_get_n_gd(struct crypto4xx_device *dev, int n)
+{
+	u32 retval;
+	u32 tmp;
+
+	if (n >= PPC4XX_NUM_GD)
+		return ERING_WAS_FULL;
+
+	retval = dev->gdr_head;
+	tmp = (dev->gdr_head + n) % PPC4XX_NUM_GD;
+	if (dev->gdr_head > dev->gdr_tail) {
+		if (tmp < dev->gdr_head && tmp >= dev->gdr_tail)
+			return ERING_WAS_FULL;
+	} else if (dev->gdr_head < dev->gdr_tail) {
+		if (tmp < dev->gdr_head || tmp >= dev->gdr_tail)
+			return ERING_WAS_FULL;
+	}
+	dev->gdr_head = tmp;
+
+	return retval;
+}
+
+static u32 crypto4xx_put_gd_to_gdr(struct crypto4xx_device *dev)
+{
+	unsigned long flags;
+
+	spin_lock_irqsave(&dev->core_dev->lock, flags);
+	if (dev->gdr_tail == dev->gdr_head) {
+		spin_unlock_irqrestore(&dev->core_dev->lock, flags);
+		return 0;
+	}
+
+	if (dev->gdr_tail != PPC4XX_LAST_GD)
+		dev->gdr_tail++;
+	else
+		dev->gdr_tail = 0;
+
+	spin_unlock_irqrestore(&dev->core_dev->lock, flags);
+
+	return 0;
+}
+
+static inline struct ce_gd *crypto4xx_get_gdp(struct crypto4xx_device *dev,
+					      dma_addr_t *gd_dma, u32 idx)
+{
+	*gd_dma = dev->gdr_pa + sizeof(struct ce_gd) * idx;
+
+	return &dev->gdr[idx];
+}
+
+/**
+ * alloc memory for the scatter ring
+ * need to alloc buf for the ring
+ * sdr_tail, sdr_head and sdr_count are initialized by this function
+ */
+static u32 crypto4xx_build_sdr(struct crypto4xx_device *dev)
+{
+	int i;
+
+	/* alloc memory for scatter descriptor ring */
+	dev->sdr = dma_alloc_coherent(dev->core_dev->device,
+				      sizeof(struct ce_sd) * PPC4XX_NUM_SD,
+				      &dev->sdr_pa, GFP_ATOMIC);
+	if (!dev->sdr)
+		return -ENOMEM;
+
+	dev->scatter_buffer_va =
+		dma_alloc_coherent(dev->core_dev->device,
+			PPC4XX_SD_BUFFER_SIZE * PPC4XX_NUM_SD,
+			&dev->scatter_buffer_pa, GFP_ATOMIC);
+	if (!dev->scatter_buffer_va)
+		return -ENOMEM;
+
+	for (i = 0; i < PPC4XX_NUM_SD; i++) {
+		dev->sdr[i].ptr = dev->scatter_buffer_pa +
+				  PPC4XX_SD_BUFFER_SIZE * i;
+	}
+
+	return 0;
+}
+
+static void crypto4xx_destroy_sdr(struct crypto4xx_device *dev)
+{
+	if (dev->sdr)
+		dma_free_coherent(dev->core_dev->device,
+				  sizeof(struct ce_sd) * PPC4XX_NUM_SD,
+				  dev->sdr, dev->sdr_pa);
+
+	if (dev->scatter_buffer_va)
+		dma_free_coherent(dev->core_dev->device,
+				  PPC4XX_SD_BUFFER_SIZE * PPC4XX_NUM_SD,
+				  dev->scatter_buffer_va,
+				  dev->scatter_buffer_pa);
+}
+
+/*
+ * when this function is called.
+ * preemption or interrupt must be disabled
+ */
+static u32 crypto4xx_get_n_sd(struct crypto4xx_device *dev, int n)
+{
+	u32 retval;
+	u32 tmp;
+
+	if (n >= PPC4XX_NUM_SD)
+		return ERING_WAS_FULL;
+
+	retval = dev->sdr_head;
+	tmp = (dev->sdr_head + n) % PPC4XX_NUM_SD;
+	if (dev->sdr_head > dev->gdr_tail) {
+		if (tmp < dev->sdr_head && tmp >= dev->sdr_tail)
+			return ERING_WAS_FULL;
+	} else if (dev->sdr_head < dev->sdr_tail) {
+		if (tmp < dev->sdr_head || tmp >= dev->sdr_tail)
+			return ERING_WAS_FULL;
+	} /* the head = tail, or empty case is already take cared */
+	dev->sdr_head = tmp;
+
+	return retval;
+}
+
+static u32 crypto4xx_put_sd_to_sdr(struct crypto4xx_device *dev)
+{
+	unsigned long flags;
+
+	spin_lock_irqsave(&dev->core_dev->lock, flags);
+	if (dev->sdr_tail == dev->sdr_head) {
+		spin_unlock_irqrestore(&dev->core_dev->lock, flags);
+		return 0;
+	}
+	if (dev->sdr_tail != PPC4XX_LAST_SD)
+		dev->sdr_tail++;
+	else
+		dev->sdr_tail = 0;
+	spin_unlock_irqrestore(&dev->core_dev->lock, flags);
+
+	return 0;
+}
+
+static inline struct ce_sd *crypto4xx_get_sdp(struct crypto4xx_device *dev,
+					      dma_addr_t *sd_dma, u32 idx)
+{
+	*sd_dma = dev->sdr_pa + sizeof(struct ce_sd) * idx;
+
+	return &dev->sdr[idx];
+}
+
+static void crypto4xx_copy_pkt_to_dst(struct crypto4xx_device *dev,
+				      struct ce_pd *pd,
+				      struct pd_uinfo *pd_uinfo,
+				      u32 nbytes,
+				      struct scatterlist *dst)
+{
+	unsigned int first_sd = pd_uinfo->first_sd;
+	unsigned int last_sd;
+	unsigned int overflow = 0;
+	unsigned int to_copy;
+	unsigned int dst_start = 0;
+
+	/*
+	 * Because the scatter buffers are all neatly organized in one
+	 * big continuous ringbuffer; scatterwalk_map_and_copy() can
+	 * be instructed to copy a range of buffers in one go.
+	 */
+
+	last_sd = (first_sd + pd_uinfo->num_sd);
+	if (last_sd > PPC4XX_LAST_SD) {
+		last_sd = PPC4XX_LAST_SD;
+		overflow = last_sd % PPC4XX_NUM_SD;
+	}
+
+	while (nbytes) {
+		void *buf = dev->scatter_buffer_va +
+			first_sd * PPC4XX_SD_BUFFER_SIZE;
+
+		to_copy = min(nbytes, PPC4XX_SD_BUFFER_SIZE *
+				      (1 + last_sd - first_sd));
+		scatterwalk_map_and_copy(buf, dst, dst_start, to_copy, 1);
+		nbytes -= to_copy;
+
+		if (overflow) {
+			first_sd = 0;
+			last_sd = overflow;
+			dst_start += to_copy;
+			overflow = 0;
+		}
+	}
+}
+
+static void crypto4xx_copy_digest_to_dst(void *dst,
+					struct pd_uinfo *pd_uinfo,
+					struct crypto4xx_ctx *ctx)
+{
+	struct dynamic_sa_ctl *sa = (struct dynamic_sa_ctl *) ctx->sa_in;
+
+	if (sa->sa_command_0.bf.hash_alg == SA_HASH_ALG_SHA1) {
+		memcpy(dst, pd_uinfo->sr_va->save_digest,
+		       SA_HASH_ALG_SHA1_DIGEST_SIZE);
+	}
+}
+
+static void crypto4xx_ret_sg_desc(struct crypto4xx_device *dev,
+				  struct pd_uinfo *pd_uinfo)
+{
+	int i;
+	if (pd_uinfo->num_gd) {
+		for (i = 0; i < pd_uinfo->num_gd; i++)
+			crypto4xx_put_gd_to_gdr(dev);
+		pd_uinfo->first_gd = 0xffffffff;
+		pd_uinfo->num_gd = 0;
+	}
+	if (pd_uinfo->num_sd) {
+		for (i = 0; i < pd_uinfo->num_sd; i++)
+			crypto4xx_put_sd_to_sdr(dev);
+
+		pd_uinfo->first_sd = 0xffffffff;
+		pd_uinfo->num_sd = 0;
+	}
+}
+
+static void crypto4xx_cipher_done(struct crypto4xx_device *dev,
+				     struct pd_uinfo *pd_uinfo,
+				     struct ce_pd *pd)
+{
+	struct skcipher_request *req;
+	struct scatterlist *dst;
+	dma_addr_t addr;
+
+	req = skcipher_request_cast(pd_uinfo->async_req);
+
+	if (pd_uinfo->using_sd) {
+		crypto4xx_copy_pkt_to_dst(dev, pd, pd_uinfo,
+					  req->cryptlen, req->dst);
+	} else {
+		dst = pd_uinfo->dest_va;
+		addr = dma_map_page(dev->core_dev->device, sg_page(dst),
+				    dst->offset, dst->length, DMA_FROM_DEVICE);
+	}
+
+	if (pd_uinfo->sa_va->sa_command_0.bf.save_iv == SA_SAVE_IV) {
+		struct crypto_skcipher *skcipher = crypto_skcipher_reqtfm(req);
+
+		crypto4xx_memcpy_from_le32((u32 *)req->iv,
+			pd_uinfo->sr_va->save_iv,
+			crypto_skcipher_ivsize(skcipher));
+	}
+
+	crypto4xx_ret_sg_desc(dev, pd_uinfo);
+
+	if (pd_uinfo->state & PD_ENTRY_BUSY)
+		skcipher_request_complete(req, -EINPROGRESS);
+	skcipher_request_complete(req, 0);
+}
+
+static void crypto4xx_ahash_done(struct crypto4xx_device *dev,
+				struct pd_uinfo *pd_uinfo)
+{
+	struct crypto4xx_ctx *ctx;
+	struct ahash_request *ahash_req;
+
+	ahash_req = ahash_request_cast(pd_uinfo->async_req);
+	ctx  = crypto_tfm_ctx(ahash_req->base.tfm);
+
+	crypto4xx_copy_digest_to_dst(ahash_req->result, pd_uinfo,
+				     crypto_tfm_ctx(ahash_req->base.tfm));
+	crypto4xx_ret_sg_desc(dev, pd_uinfo);
+
+	if (pd_uinfo->state & PD_ENTRY_BUSY)
+		ahash_request_complete(ahash_req, -EINPROGRESS);
+	ahash_request_complete(ahash_req, 0);
+}
+
+static void crypto4xx_aead_done(struct crypto4xx_device *dev,
+				struct pd_uinfo *pd_uinfo,
+				struct ce_pd *pd)
+{
+	struct aead_request *aead_req = container_of(pd_uinfo->async_req,
+		struct aead_request, base);
+	struct scatterlist *dst = pd_uinfo->dest_va;
+	size_t cp_len = crypto_aead_authsize(
+		crypto_aead_reqtfm(aead_req));
+	u32 icv[AES_BLOCK_SIZE];
+	int err = 0;
+
+	if (pd_uinfo->using_sd) {
+		crypto4xx_copy_pkt_to_dst(dev, pd, pd_uinfo,
+					  pd->pd_ctl_len.bf.pkt_len,
+					  dst);
+	} else {
+		__dma_sync_page(sg_page(dst), dst->offset, dst->length,
+				DMA_FROM_DEVICE);
+	}
+
+	if (pd_uinfo->sa_va->sa_command_0.bf.dir == DIR_OUTBOUND) {
+		/* append icv at the end */
+		crypto4xx_memcpy_from_le32(icv, pd_uinfo->sr_va->save_digest,
+					   sizeof(icv));
+
+		scatterwalk_map_and_copy(icv, dst, aead_req->cryptlen,
+					 cp_len, 1);
+	} else {
+		/* check icv at the end */
+		scatterwalk_map_and_copy(icv, aead_req->src,
+			aead_req->assoclen + aead_req->cryptlen -
+			cp_len, cp_len, 0);
+
+		crypto4xx_memcpy_from_le32(icv, icv, sizeof(icv));
+
+		if (crypto_memneq(icv, pd_uinfo->sr_va->save_digest, cp_len))
+			err = -EBADMSG;
+	}
+
+	crypto4xx_ret_sg_desc(dev, pd_uinfo);
+
+	if (pd->pd_ctl.bf.status & 0xff) {
+		if (!__ratelimit(&dev->aead_ratelimit)) {
+			if (pd->pd_ctl.bf.status & 2)
+				pr_err("pad fail error\n");
+			if (pd->pd_ctl.bf.status & 4)
+				pr_err("seqnum fail\n");
+			if (pd->pd_ctl.bf.status & 8)
+				pr_err("error _notify\n");
+			pr_err("aead return err status = 0x%02x\n",
+				pd->pd_ctl.bf.status & 0xff);
+			pr_err("pd pad_ctl = 0x%08x\n",
+				pd->pd_ctl.bf.pd_pad_ctl);
+		}
+		err = -EINVAL;
+	}
+
+	if (pd_uinfo->state & PD_ENTRY_BUSY)
+		aead_request_complete(aead_req, -EINPROGRESS);
+
+	aead_request_complete(aead_req, err);
+}
+
+static void crypto4xx_pd_done(struct crypto4xx_device *dev, u32 idx)
+{
+	struct ce_pd *pd = &dev->pdr[idx];
+	struct pd_uinfo *pd_uinfo = &dev->pdr_uinfo[idx];
+
+	switch (crypto_tfm_alg_type(pd_uinfo->async_req->tfm)) {
+	case CRYPTO_ALG_TYPE_SKCIPHER:
+		crypto4xx_cipher_done(dev, pd_uinfo, pd);
+		break;
+	case CRYPTO_ALG_TYPE_AEAD:
+		crypto4xx_aead_done(dev, pd_uinfo, pd);
+		break;
+	case CRYPTO_ALG_TYPE_AHASH:
+		crypto4xx_ahash_done(dev, pd_uinfo);
+		break;
+	}
+}
+
+static void crypto4xx_stop_all(struct crypto4xx_core_device *core_dev)
+{
+	crypto4xx_destroy_pdr(core_dev->dev);
+	crypto4xx_destroy_gdr(core_dev->dev);
+	crypto4xx_destroy_sdr(core_dev->dev);
+	iounmap(core_dev->dev->ce_base);
+	kfree(core_dev->dev);
+	kfree(core_dev);
+}
+
+static u32 get_next_gd(u32 current)
+{
+	if (current != PPC4XX_LAST_GD)
+		return current + 1;
+	else
+		return 0;
+}
+
+static u32 get_next_sd(u32 current)
+{
+	if (current != PPC4XX_LAST_SD)
+		return current + 1;
+	else
+		return 0;
+}
+
+int crypto4xx_build_pd(struct crypto_async_request *req,
+		       struct crypto4xx_ctx *ctx,
+		       struct scatterlist *src,
+		       struct scatterlist *dst,
+		       const unsigned int datalen,
+		       const __le32 *iv, const u32 iv_len,
+		       const struct dynamic_sa_ctl *req_sa,
+		       const unsigned int sa_len,
+		       const unsigned int assoclen,
+		       struct scatterlist *_dst)
+{
+	struct crypto4xx_device *dev = ctx->dev;
+	struct dynamic_sa_ctl *sa;
+	struct ce_gd *gd;
+	struct ce_pd *pd;
+	u32 num_gd, num_sd;
+	u32 fst_gd = 0xffffffff;
+	u32 fst_sd = 0xffffffff;
+	u32 pd_entry;
+	unsigned long flags;
+	struct pd_uinfo *pd_uinfo;
+	unsigned int nbytes = datalen;
+	size_t offset_to_sr_ptr;
+	u32 gd_idx = 0;
+	int tmp;
+	bool is_busy, force_sd;
+
+	/*
+	 * There's a very subtile/disguised "bug" in the hardware that
+	 * gets indirectly mentioned in 18.1.3.5 Encryption/Decryption
+	 * of the hardware spec:
+	 * *drum roll* the AES/(T)DES OFB and CFB modes are listed as
+	 * operation modes for >>> "Block ciphers" <<<.
+	 *
+	 * To workaround this issue and stop the hardware from causing
+	 * "overran dst buffer" on crypttexts that are not a multiple
+	 * of 16 (AES_BLOCK_SIZE), we force the driver to use the
+	 * scatter buffers.
+	 */
+	force_sd = (req_sa->sa_command_1.bf.crypto_mode9_8 == CRYPTO_MODE_CFB
+		|| req_sa->sa_command_1.bf.crypto_mode9_8 == CRYPTO_MODE_OFB)
+		&& (datalen % AES_BLOCK_SIZE);
+
+	/* figure how many gd are needed */
+	tmp = sg_nents_for_len(src, assoclen + datalen);
+	if (tmp < 0) {
+		dev_err(dev->core_dev->device, "Invalid number of src SG.\n");
+		return tmp;
+	}
+	if (tmp == 1)
+		tmp = 0;
+	num_gd = tmp;
+
+	if (assoclen) {
+		nbytes += assoclen;
+		dst = scatterwalk_ffwd(_dst, dst, assoclen);
+	}
+
+	/* figure how many sd are needed */
+	if (sg_is_last(dst) && force_sd == false) {
+		num_sd = 0;
+	} else {
+		if (datalen > PPC4XX_SD_BUFFER_SIZE) {
+			num_sd = datalen / PPC4XX_SD_BUFFER_SIZE;
+			if (datalen % PPC4XX_SD_BUFFER_SIZE)
+				num_sd++;
+		} else {
+			num_sd = 1;
+		}
+	}
+
+	/*
+	 * The follow section of code needs to be protected
+	 * The gather ring and scatter ring needs to be consecutive
+	 * In case of run out of any kind of descriptor, the descriptor
+	 * already got must be return the original place.
+	 */
+	spin_lock_irqsave(&dev->core_dev->lock, flags);
+	/*
+	 * Let the caller know to slow down, once more than 13/16ths = 81%
+	 * of the available data contexts are being used simultaneously.
+	 *
+	 * With PPC4XX_NUM_PD = 256, this will leave a "backlog queue" for
+	 * 31 more contexts. Before new requests have to be rejected.
+	 */
+	if (req->flags & CRYPTO_TFM_REQ_MAY_BACKLOG) {
+		is_busy = ((dev->pdr_head - dev->pdr_tail) % PPC4XX_NUM_PD) >=
+			((PPC4XX_NUM_PD * 13) / 16);
+	} else {
+		/*
+		 * To fix contention issues between ipsec (no blacklog) and
+		 * dm-crypto (backlog) reserve 32 entries for "no backlog"
+		 * data contexts.
+		 */
+		is_busy = ((dev->pdr_head - dev->pdr_tail) % PPC4XX_NUM_PD) >=
+			((PPC4XX_NUM_PD * 15) / 16);
+
+		if (is_busy) {
+			spin_unlock_irqrestore(&dev->core_dev->lock, flags);
+			return -EBUSY;
+		}
+	}
+
+	if (num_gd) {
+		fst_gd = crypto4xx_get_n_gd(dev, num_gd);
+		if (fst_gd == ERING_WAS_FULL) {
+			spin_unlock_irqrestore(&dev->core_dev->lock, flags);
+			return -EAGAIN;
+		}
+	}
+	if (num_sd) {
+		fst_sd = crypto4xx_get_n_sd(dev, num_sd);
+		if (fst_sd == ERING_WAS_FULL) {
+			if (num_gd)
+				dev->gdr_head = fst_gd;
+			spin_unlock_irqrestore(&dev->core_dev->lock, flags);
+			return -EAGAIN;
+		}
+	}
+	pd_entry = crypto4xx_get_pd_from_pdr_nolock(dev);
+	if (pd_entry == ERING_WAS_FULL) {
+		if (num_gd)
+			dev->gdr_head = fst_gd;
+		if (num_sd)
+			dev->sdr_head = fst_sd;
+		spin_unlock_irqrestore(&dev->core_dev->lock, flags);
+		return -EAGAIN;
+	}
+	spin_unlock_irqrestore(&dev->core_dev->lock, flags);
+
+	pd = &dev->pdr[pd_entry];
+	pd->sa_len = sa_len;
+
+	pd_uinfo = &dev->pdr_uinfo[pd_entry];
+	pd_uinfo->num_gd = num_gd;
+	pd_uinfo->num_sd = num_sd;
+	pd_uinfo->dest_va = dst;
+	pd_uinfo->async_req = req;
+
+	if (iv_len)
+		memcpy(pd_uinfo->sr_va->save_iv, iv, iv_len);
+
+	sa = pd_uinfo->sa_va;
+	memcpy(sa, req_sa, sa_len * 4);
+
+	sa->sa_command_1.bf.hash_crypto_offset = (assoclen >> 2);
+	offset_to_sr_ptr = get_dynamic_sa_offset_state_ptr_field(sa);
+	*(u32 *)((unsigned long)sa + offset_to_sr_ptr) = pd_uinfo->sr_pa;
+
+	if (num_gd) {
+		dma_addr_t gd_dma;
+		struct scatterlist *sg;
+
+		/* get first gd we are going to use */
+		gd_idx = fst_gd;
+		pd_uinfo->first_gd = fst_gd;
+		gd = crypto4xx_get_gdp(dev, &gd_dma, gd_idx);
+		pd->src = gd_dma;
+		/* enable gather */
+		sa->sa_command_0.bf.gather = 1;
+		/* walk the sg, and setup gather array */
+
+		sg = src;
+		while (nbytes) {
+			size_t len;
+
+			len = min(sg->length, nbytes);
+			gd->ptr = dma_map_page(dev->core_dev->device,
+				sg_page(sg), sg->offset, len, DMA_TO_DEVICE);
+			gd->ctl_len.len = len;
+			gd->ctl_len.done = 0;
+			gd->ctl_len.ready = 1;
+			if (len >= nbytes)
+				break;
+
+			nbytes -= sg->length;
+			gd_idx = get_next_gd(gd_idx);
+			gd = crypto4xx_get_gdp(dev, &gd_dma, gd_idx);
+			sg = sg_next(sg);
+		}
+	} else {
+		pd->src = (u32)dma_map_page(dev->core_dev->device, sg_page(src),
+				src->offset, min(nbytes, src->length),
+				DMA_TO_DEVICE);
+		/*
+		 * Disable gather in sa command
+		 */
+		sa->sa_command_0.bf.gather = 0;
+		/*
+		 * Indicate gather array is not used
+		 */
+		pd_uinfo->first_gd = 0xffffffff;
+	}
+	if (!num_sd) {
+		/*
+		 * we know application give us dst a whole piece of memory
+		 * no need to use scatter ring.
+		 */
+		pd_uinfo->using_sd = 0;
+		pd_uinfo->first_sd = 0xffffffff;
+		sa->sa_command_0.bf.scatter = 0;
+		pd->dest = (u32)dma_map_page(dev->core_dev->device,
+					     sg_page(dst), dst->offset,
+					     min(datalen, dst->length),
+					     DMA_TO_DEVICE);
+	} else {
+		dma_addr_t sd_dma;
+		struct ce_sd *sd = NULL;
+
+		u32 sd_idx = fst_sd;
+		nbytes = datalen;
+		sa->sa_command_0.bf.scatter = 1;
+		pd_uinfo->using_sd = 1;
+		pd_uinfo->first_sd = fst_sd;
+		sd = crypto4xx_get_sdp(dev, &sd_dma, sd_idx);
+		pd->dest = sd_dma;
+		/* setup scatter descriptor */
+		sd->ctl.done = 0;
+		sd->ctl.rdy = 1;
+		/* sd->ptr should be setup by sd_init routine*/
+		if (nbytes >= PPC4XX_SD_BUFFER_SIZE)
+			nbytes -= PPC4XX_SD_BUFFER_SIZE;
+		else
+			nbytes = 0;
+		while (nbytes) {
+			sd_idx = get_next_sd(sd_idx);
+			sd = crypto4xx_get_sdp(dev, &sd_dma, sd_idx);
+			/* setup scatter descriptor */
+			sd->ctl.done = 0;
+			sd->ctl.rdy = 1;
+			if (nbytes >= PPC4XX_SD_BUFFER_SIZE) {
+				nbytes -= PPC4XX_SD_BUFFER_SIZE;
+			} else {
+				/*
+				 * SD entry can hold PPC4XX_SD_BUFFER_SIZE,
+				 * which is more than nbytes, so done.
+				 */
+				nbytes = 0;
+			}
+		}
+	}
+
+	pd->pd_ctl.w = PD_CTL_HOST_READY |
+		((crypto_tfm_alg_type(req->tfm) == CRYPTO_ALG_TYPE_AHASH) ||
+		 (crypto_tfm_alg_type(req->tfm) == CRYPTO_ALG_TYPE_AEAD) ?
+			PD_CTL_HASH_FINAL : 0);
+	pd->pd_ctl_len.w = 0x00400000 | (assoclen + datalen);
+	pd_uinfo->state = PD_ENTRY_INUSE | (is_busy ? PD_ENTRY_BUSY : 0);
+
+	wmb();
+	/* write any value to push engine to read a pd */
+	writel(0, dev->ce_base + CRYPTO4XX_INT_DESCR_RD);
+	writel(1, dev->ce_base + CRYPTO4XX_INT_DESCR_RD);
+	return is_busy ? -EBUSY : -EINPROGRESS;
+}
+
+/**
+ * Algorithm Registration Functions
+ */
+static void crypto4xx_ctx_init(struct crypto4xx_alg *amcc_alg,
+			       struct crypto4xx_ctx *ctx)
+{
+	ctx->dev = amcc_alg->dev;
+	ctx->sa_in = NULL;
+	ctx->sa_out = NULL;
+	ctx->sa_len = 0;
+}
+
+static int crypto4xx_sk_init(struct crypto_skcipher *sk)
+{
+	struct skcipher_alg *alg = crypto_skcipher_alg(sk);
+	struct crypto4xx_alg *amcc_alg;
+	struct crypto4xx_ctx *ctx =  crypto_skcipher_ctx(sk);
+
+	if (alg->base.cra_flags & CRYPTO_ALG_NEED_FALLBACK) {
+		ctx->sw_cipher.cipher =
+			crypto_alloc_skcipher(alg->base.cra_name, 0,
+					      CRYPTO_ALG_NEED_FALLBACK |
+					      CRYPTO_ALG_ASYNC);
+		if (IS_ERR(ctx->sw_cipher.cipher))
+			return PTR_ERR(ctx->sw_cipher.cipher);
+
+		crypto_skcipher_set_reqsize(sk,
+			sizeof(struct skcipher_request) + 32 +
+			crypto_skcipher_reqsize(ctx->sw_cipher.cipher));
+	}
+
+	amcc_alg = container_of(alg, struct crypto4xx_alg, alg.u.cipher);
+	crypto4xx_ctx_init(amcc_alg, ctx);
+	return 0;
+}
+
+static void crypto4xx_common_exit(struct crypto4xx_ctx *ctx)
+{
+	crypto4xx_free_sa(ctx);
+}
+
+static void crypto4xx_sk_exit(struct crypto_skcipher *sk)
+{
+	struct crypto4xx_ctx *ctx =  crypto_skcipher_ctx(sk);
+
+	crypto4xx_common_exit(ctx);
+	if (ctx->sw_cipher.cipher)
+		crypto_free_skcipher(ctx->sw_cipher.cipher);
+}
+
+static int crypto4xx_aead_init(struct crypto_aead *tfm)
+{
+	struct aead_alg *alg = crypto_aead_alg(tfm);
+	struct crypto4xx_ctx *ctx = crypto_aead_ctx(tfm);
+	struct crypto4xx_alg *amcc_alg;
+
+	ctx->sw_cipher.aead = crypto_alloc_aead(alg->base.cra_name, 0,
+						CRYPTO_ALG_NEED_FALLBACK |
+						CRYPTO_ALG_ASYNC);
+	if (IS_ERR(ctx->sw_cipher.aead))
+		return PTR_ERR(ctx->sw_cipher.aead);
+
+	amcc_alg = container_of(alg, struct crypto4xx_alg, alg.u.aead);
+	crypto4xx_ctx_init(amcc_alg, ctx);
+	crypto_aead_set_reqsize(tfm, max(sizeof(struct aead_request) + 32 +
+				crypto_aead_reqsize(ctx->sw_cipher.aead),
+				sizeof(struct crypto4xx_aead_reqctx)));
+	return 0;
+}
+
+static void crypto4xx_aead_exit(struct crypto_aead *tfm)
+{
+	struct crypto4xx_ctx *ctx = crypto_aead_ctx(tfm);
+
+	crypto4xx_common_exit(ctx);
+	crypto_free_aead(ctx->sw_cipher.aead);
+}
+
+static int crypto4xx_register_alg(struct crypto4xx_device *sec_dev,
+				  struct crypto4xx_alg_common *crypto_alg,
+				  int array_size)
+{
+	struct crypto4xx_alg *alg;
+	int i;
+	int rc = 0;
+
+	for (i = 0; i < array_size; i++) {
+		alg = kzalloc(sizeof(struct crypto4xx_alg), GFP_KERNEL);
+		if (!alg)
+			return -ENOMEM;
+
+		alg->alg = crypto_alg[i];
+		alg->dev = sec_dev;
+
+		switch (alg->alg.type) {
+		case CRYPTO_ALG_TYPE_AEAD:
+			rc = crypto_register_aead(&alg->alg.u.aead);
+			break;
+
+		case CRYPTO_ALG_TYPE_AHASH:
+			rc = crypto_register_ahash(&alg->alg.u.hash);
+			break;
+
+		default:
+			rc = crypto_register_skcipher(&alg->alg.u.cipher);
+			break;
+		}
+
+		if (rc)
+			kfree(alg);
+		else
+			list_add_tail(&alg->entry, &sec_dev->alg_list);
+	}
+
+	return 0;
+}
+
+static void crypto4xx_unregister_alg(struct crypto4xx_device *sec_dev)
+{
+	struct crypto4xx_alg *alg, *tmp;
+
+	list_for_each_entry_safe(alg, tmp, &sec_dev->alg_list, entry) {
+		list_del(&alg->entry);
+		switch (alg->alg.type) {
+		case CRYPTO_ALG_TYPE_AHASH:
+			crypto_unregister_ahash(&alg->alg.u.hash);
+			break;
+
+		case CRYPTO_ALG_TYPE_AEAD:
+			crypto_unregister_aead(&alg->alg.u.aead);
+			break;
+
+		default:
+			crypto_unregister_skcipher(&alg->alg.u.cipher);
+		}
+		kfree(alg);
+	}
+}
+
+static void crypto4xx_bh_tasklet_cb(unsigned long data)
+{
+	struct device *dev = (struct device *)data;
+	struct crypto4xx_core_device *core_dev = dev_get_drvdata(dev);
+	struct pd_uinfo *pd_uinfo;
+	struct ce_pd *pd;
+	u32 tail = core_dev->dev->pdr_tail;
+	u32 head = core_dev->dev->pdr_head;
+
+	do {
+		pd_uinfo = &core_dev->dev->pdr_uinfo[tail];
+		pd = &core_dev->dev->pdr[tail];
+		if ((pd_uinfo->state & PD_ENTRY_INUSE) &&
+		     ((READ_ONCE(pd->pd_ctl.w) &
+		       (PD_CTL_PE_DONE | PD_CTL_HOST_READY)) ==
+		       PD_CTL_PE_DONE)) {
+			crypto4xx_pd_done(core_dev->dev, tail);
+			tail = crypto4xx_put_pd_to_pdr(core_dev->dev, tail);
+		} else {
+			/* if tail not done, break */
+			break;
+		}
+	} while (head != tail);
+}
+
+/**
+ * Top Half of isr.
+ */
+static inline irqreturn_t crypto4xx_interrupt_handler(int irq, void *data,
+						      u32 clr_val)
+{
+	struct device *dev = (struct device *)data;
+	struct crypto4xx_core_device *core_dev = dev_get_drvdata(dev);
+
+	writel(clr_val, core_dev->dev->ce_base + CRYPTO4XX_INT_CLR);
+	tasklet_schedule(&core_dev->tasklet);
+
+	return IRQ_HANDLED;
+}
+
+static irqreturn_t crypto4xx_ce_interrupt_handler(int irq, void *data)
+{
+	return crypto4xx_interrupt_handler(irq, data, PPC4XX_INTERRUPT_CLR);
+}
+
+static irqreturn_t crypto4xx_ce_interrupt_handler_revb(int irq, void *data)
+{
+	return crypto4xx_interrupt_handler(irq, data, PPC4XX_INTERRUPT_CLR |
+		PPC4XX_TMO_ERR_INT);
+}
+
+/**
+ * Supported Crypto Algorithms
+ */
+static struct crypto4xx_alg_common crypto4xx_alg[] = {
+	/* Crypto AES modes */
+	{ .type = CRYPTO_ALG_TYPE_SKCIPHER, .u.cipher = {
+		.base = {
+			.cra_name = "cbc(aes)",
+			.cra_driver_name = "cbc-aes-ppc4xx",
+			.cra_priority = CRYPTO4XX_CRYPTO_PRIORITY,
+			.cra_flags = CRYPTO_ALG_ASYNC |
+				CRYPTO_ALG_KERN_DRIVER_ONLY,
+			.cra_blocksize = AES_BLOCK_SIZE,
+			.cra_ctxsize = sizeof(struct crypto4xx_ctx),
+			.cra_module = THIS_MODULE,
+		},
+		.min_keysize = AES_MIN_KEY_SIZE,
+		.max_keysize = AES_MAX_KEY_SIZE,
+		.ivsize	= AES_IV_SIZE,
+		.setkey = crypto4xx_setkey_aes_cbc,
+		.encrypt = crypto4xx_encrypt_iv_block,
+		.decrypt = crypto4xx_decrypt_iv_block,
+		.init = crypto4xx_sk_init,
+		.exit = crypto4xx_sk_exit,
+	} },
+	{ .type = CRYPTO_ALG_TYPE_SKCIPHER, .u.cipher = {
+		.base = {
+			.cra_name = "cfb(aes)",
+			.cra_driver_name = "cfb-aes-ppc4xx",
+			.cra_priority = CRYPTO4XX_CRYPTO_PRIORITY,
+			.cra_flags = CRYPTO_ALG_ASYNC |
+				CRYPTO_ALG_KERN_DRIVER_ONLY,
+			.cra_blocksize = AES_BLOCK_SIZE,
+			.cra_ctxsize = sizeof(struct crypto4xx_ctx),
+			.cra_module = THIS_MODULE,
+		},
+		.min_keysize = AES_MIN_KEY_SIZE,
+		.max_keysize = AES_MAX_KEY_SIZE,
+		.ivsize	= AES_IV_SIZE,
+		.setkey	= crypto4xx_setkey_aes_cfb,
+		.encrypt = crypto4xx_encrypt_iv_stream,
+		.decrypt = crypto4xx_decrypt_iv_stream,
+		.init = crypto4xx_sk_init,
+		.exit = crypto4xx_sk_exit,
+	} },
+	{ .type = CRYPTO_ALG_TYPE_SKCIPHER, .u.cipher = {
+		.base = {
+			.cra_name = "ctr(aes)",
+			.cra_driver_name = "ctr-aes-ppc4xx",
+			.cra_priority = CRYPTO4XX_CRYPTO_PRIORITY,
+			.cra_flags = CRYPTO_ALG_NEED_FALLBACK |
+				CRYPTO_ALG_ASYNC |
+				CRYPTO_ALG_KERN_DRIVER_ONLY,
+			.cra_blocksize = 1,
+			.cra_ctxsize = sizeof(struct crypto4xx_ctx),
+			.cra_module = THIS_MODULE,
+		},
+		.min_keysize = AES_MIN_KEY_SIZE,
+		.max_keysize = AES_MAX_KEY_SIZE,
+		.ivsize	= AES_IV_SIZE,
+		.setkey	= crypto4xx_setkey_aes_ctr,
+		.encrypt = crypto4xx_encrypt_ctr,
+		.decrypt = crypto4xx_decrypt_ctr,
+		.init = crypto4xx_sk_init,
+		.exit = crypto4xx_sk_exit,
+	} },
+	{ .type = CRYPTO_ALG_TYPE_SKCIPHER, .u.cipher = {
+		.base = {
+			.cra_name = "rfc3686(ctr(aes))",
+			.cra_driver_name = "rfc3686-ctr-aes-ppc4xx",
+			.cra_priority = CRYPTO4XX_CRYPTO_PRIORITY,
+			.cra_flags = CRYPTO_ALG_ASYNC |
+				CRYPTO_ALG_KERN_DRIVER_ONLY,
+			.cra_blocksize = 1,
+			.cra_ctxsize = sizeof(struct crypto4xx_ctx),
+			.cra_module = THIS_MODULE,
+		},
+		.min_keysize = AES_MIN_KEY_SIZE + CTR_RFC3686_NONCE_SIZE,
+		.max_keysize = AES_MAX_KEY_SIZE + CTR_RFC3686_NONCE_SIZE,
+		.ivsize	= CTR_RFC3686_IV_SIZE,
+		.setkey = crypto4xx_setkey_rfc3686,
+		.encrypt = crypto4xx_rfc3686_encrypt,
+		.decrypt = crypto4xx_rfc3686_decrypt,
+		.init = crypto4xx_sk_init,
+		.exit = crypto4xx_sk_exit,
+	} },
+	{ .type = CRYPTO_ALG_TYPE_SKCIPHER, .u.cipher = {
+		.base = {
+			.cra_name = "ecb(aes)",
+			.cra_driver_name = "ecb-aes-ppc4xx",
+			.cra_priority = CRYPTO4XX_CRYPTO_PRIORITY,
+			.cra_flags = CRYPTO_ALG_ASYNC |
+				CRYPTO_ALG_KERN_DRIVER_ONLY,
+			.cra_blocksize = 1,
+			.cra_ctxsize = sizeof(struct crypto4xx_ctx),
+			.cra_module = THIS_MODULE,
+		},
+		.min_keysize = AES_MIN_KEY_SIZE,
+		.max_keysize = AES_MAX_KEY_SIZE,
+		.setkey	= crypto4xx_setkey_aes_ecb,
+		.encrypt = crypto4xx_encrypt_noiv_block,
+		.decrypt = crypto4xx_decrypt_noiv_block,
+		.init = crypto4xx_sk_init,
+		.exit = crypto4xx_sk_exit,
+	} },
+	{ .type = CRYPTO_ALG_TYPE_SKCIPHER, .u.cipher = {
+		.base = {
+			.cra_name = "ofb(aes)",
+			.cra_driver_name = "ofb-aes-ppc4xx",
+			.cra_priority = CRYPTO4XX_CRYPTO_PRIORITY,
+			.cra_flags = CRYPTO_ALG_ASYNC |
+				CRYPTO_ALG_KERN_DRIVER_ONLY,
+			.cra_blocksize = 1,
+			.cra_ctxsize = sizeof(struct crypto4xx_ctx),
+			.cra_module = THIS_MODULE,
+		},
+		.min_keysize = AES_MIN_KEY_SIZE,
+		.max_keysize = AES_MAX_KEY_SIZE,
+		.ivsize	= AES_IV_SIZE,
+		.setkey	= crypto4xx_setkey_aes_ofb,
+		.encrypt = crypto4xx_encrypt_iv_stream,
+		.decrypt = crypto4xx_decrypt_iv_stream,
+		.init = crypto4xx_sk_init,
+		.exit = crypto4xx_sk_exit,
+	} },
+
+	/* AEAD */
+	{ .type = CRYPTO_ALG_TYPE_AEAD, .u.aead = {
+		.setkey		= crypto4xx_setkey_aes_ccm,
+		.setauthsize	= crypto4xx_setauthsize_aead,
+		.encrypt	= crypto4xx_encrypt_aes_ccm,
+		.decrypt	= crypto4xx_decrypt_aes_ccm,
+		.init		= crypto4xx_aead_init,
+		.exit		= crypto4xx_aead_exit,
+		.ivsize		= AES_BLOCK_SIZE,
+		.maxauthsize    = 16,
+		.base = {
+			.cra_name	= "ccm(aes)",
+			.cra_driver_name = "ccm-aes-ppc4xx",
+			.cra_priority	= CRYPTO4XX_CRYPTO_PRIORITY,
+			.cra_flags	= CRYPTO_ALG_ASYNC |
+					  CRYPTO_ALG_NEED_FALLBACK |
+					  CRYPTO_ALG_KERN_DRIVER_ONLY,
+			.cra_blocksize	= 1,
+			.cra_ctxsize	= sizeof(struct crypto4xx_ctx),
+			.cra_module	= THIS_MODULE,
+		},
+	} },
+	{ .type = CRYPTO_ALG_TYPE_AEAD, .u.aead = {
+		.setkey		= crypto4xx_setkey_aes_gcm,
+		.setauthsize	= crypto4xx_setauthsize_aead,
+		.encrypt	= crypto4xx_encrypt_aes_gcm,
+		.decrypt	= crypto4xx_decrypt_aes_gcm,
+		.init		= crypto4xx_aead_init,
+		.exit		= crypto4xx_aead_exit,
+		.ivsize		= GCM_AES_IV_SIZE,
+		.maxauthsize	= 16,
+		.base = {
+			.cra_name	= "gcm(aes)",
+			.cra_driver_name = "gcm-aes-ppc4xx",
+			.cra_priority	= CRYPTO4XX_CRYPTO_PRIORITY,
+			.cra_flags	= CRYPTO_ALG_ASYNC |
+					  CRYPTO_ALG_NEED_FALLBACK |
+					  CRYPTO_ALG_KERN_DRIVER_ONLY,
+			.cra_blocksize	= 1,
+			.cra_ctxsize	= sizeof(struct crypto4xx_ctx),
+			.cra_module	= THIS_MODULE,
+		},
+	} },
+};
+
+/**
+ * Module Initialization Routine
+ */
+static int crypto4xx_probe(struct platform_device *ofdev)
+{
+	int rc;
+	struct resource res;
+	struct device *dev = &ofdev->dev;
+	struct crypto4xx_core_device *core_dev;
+	u32 pvr;
+	bool is_revb = true;
+
+	rc = of_address_to_resource(ofdev->dev.of_node, 0, &res);
+	if (rc)
+		return -ENODEV;
+
+	if (of_find_compatible_node(NULL, NULL, "amcc,ppc460ex-crypto")) {
+		mtdcri(SDR0, PPC460EX_SDR0_SRST,
+		       mfdcri(SDR0, PPC460EX_SDR0_SRST) | PPC460EX_CE_RESET);
+		mtdcri(SDR0, PPC460EX_SDR0_SRST,
+		       mfdcri(SDR0, PPC460EX_SDR0_SRST) & ~PPC460EX_CE_RESET);
+	} else if (of_find_compatible_node(NULL, NULL,
+			"amcc,ppc405ex-crypto")) {
+		mtdcri(SDR0, PPC405EX_SDR0_SRST,
+		       mfdcri(SDR0, PPC405EX_SDR0_SRST) | PPC405EX_CE_RESET);
+		mtdcri(SDR0, PPC405EX_SDR0_SRST,
+		       mfdcri(SDR0, PPC405EX_SDR0_SRST) & ~PPC405EX_CE_RESET);
+		is_revb = false;
+	} else if (of_find_compatible_node(NULL, NULL,
+			"amcc,ppc460sx-crypto")) {
+		mtdcri(SDR0, PPC460SX_SDR0_SRST,
+		       mfdcri(SDR0, PPC460SX_SDR0_SRST) | PPC460SX_CE_RESET);
+		mtdcri(SDR0, PPC460SX_SDR0_SRST,
+		       mfdcri(SDR0, PPC460SX_SDR0_SRST) & ~PPC460SX_CE_RESET);
+	} else {
+		printk(KERN_ERR "Crypto Function Not supported!\n");
+		return -EINVAL;
+	}
+
+	core_dev = kzalloc(sizeof(struct crypto4xx_core_device), GFP_KERNEL);
+	if (!core_dev)
+		return -ENOMEM;
+
+	dev_set_drvdata(dev, core_dev);
+	core_dev->ofdev = ofdev;
+	core_dev->dev = kzalloc(sizeof(struct crypto4xx_device), GFP_KERNEL);
+	rc = -ENOMEM;
+	if (!core_dev->dev)
+		goto err_alloc_dev;
+
+	/*
+	 * Older version of 460EX/GT have a hardware bug.
+	 * Hence they do not support H/W based security intr coalescing
+	 */
+	pvr = mfspr(SPRN_PVR);
+	if (is_revb && ((pvr >> 4) == 0x130218A)) {
+		u32 min = PVR_MIN(pvr);
+
+		if (min < 4) {
+			dev_info(dev, "RevA detected - disable interrupt coalescing\n");
+			is_revb = false;
+		}
+	}
+
+	core_dev->dev->core_dev = core_dev;
+	core_dev->dev->is_revb = is_revb;
+	core_dev->device = dev;
+	spin_lock_init(&core_dev->lock);
+	INIT_LIST_HEAD(&core_dev->dev->alg_list);
+	ratelimit_default_init(&core_dev->dev->aead_ratelimit);
+	rc = crypto4xx_build_pdr(core_dev->dev);
+	if (rc)
+		goto err_build_pdr;
+
+	rc = crypto4xx_build_gdr(core_dev->dev);
+	if (rc)
+		goto err_build_pdr;
+
+	rc = crypto4xx_build_sdr(core_dev->dev);
+	if (rc)
+		goto err_build_sdr;
+
+	/* Init tasklet for bottom half processing */
+	tasklet_init(&core_dev->tasklet, crypto4xx_bh_tasklet_cb,
+		     (unsigned long) dev);
+
+	core_dev->dev->ce_base = of_iomap(ofdev->dev.of_node, 0);
+	if (!core_dev->dev->ce_base) {
+		dev_err(dev, "failed to of_iomap\n");
+		rc = -ENOMEM;
+		goto err_iomap;
+	}
+
+	/* Register for Crypto isr, Crypto Engine IRQ */
+	core_dev->irq = irq_of_parse_and_map(ofdev->dev.of_node, 0);
+	rc = request_irq(core_dev->irq, is_revb ?
+			 crypto4xx_ce_interrupt_handler_revb :
+			 crypto4xx_ce_interrupt_handler, 0,
+			 KBUILD_MODNAME, dev);
+	if (rc)
+		goto err_request_irq;
+
+	/* need to setup pdr, rdr, gdr and sdr before this */
+	crypto4xx_hw_init(core_dev->dev);
+
+	/* Register security algorithms with Linux CryptoAPI */
+	rc = crypto4xx_register_alg(core_dev->dev, crypto4xx_alg,
+			       ARRAY_SIZE(crypto4xx_alg));
+	if (rc)
+		goto err_start_dev;
+
+	ppc4xx_trng_probe(core_dev);
+	return 0;
+
+err_start_dev:
+	free_irq(core_dev->irq, dev);
+err_request_irq:
+	irq_dispose_mapping(core_dev->irq);
+	iounmap(core_dev->dev->ce_base);
+err_iomap:
+	tasklet_kill(&core_dev->tasklet);
+err_build_sdr:
+	crypto4xx_destroy_sdr(core_dev->dev);
+	crypto4xx_destroy_gdr(core_dev->dev);
+err_build_pdr:
+	crypto4xx_destroy_pdr(core_dev->dev);
+	kfree(core_dev->dev);
+err_alloc_dev:
+	kfree(core_dev);
+
+	return rc;
+}
+
+static int crypto4xx_remove(struct platform_device *ofdev)
+{
+	struct device *dev = &ofdev->dev;
+	struct crypto4xx_core_device *core_dev = dev_get_drvdata(dev);
+
+	ppc4xx_trng_remove(core_dev);
+
+	free_irq(core_dev->irq, dev);
+	irq_dispose_mapping(core_dev->irq);
+
+	tasklet_kill(&core_dev->tasklet);
+	/* Un-register with Linux CryptoAPI */
+	crypto4xx_unregister_alg(core_dev->dev);
+	/* Free all allocated memory */
+	crypto4xx_stop_all(core_dev);
+
+	return 0;
+}
+
+static const struct of_device_id crypto4xx_match[] = {
+	{ .compatible      = "amcc,ppc4xx-crypto",},
+	{ },
+};
+MODULE_DEVICE_TABLE(of, crypto4xx_match);
+
+static struct platform_driver crypto4xx_driver = {
+	.driver = {
+		.name = KBUILD_MODNAME,
+		.of_match_table = crypto4xx_match,
+	},
+	.probe		= crypto4xx_probe,
+	.remove		= crypto4xx_remove,
+};
+
+module_platform_driver(crypto4xx_driver);
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("James Hsiao <jhsiao@amcc.com>");
+MODULE_DESCRIPTION("Driver for AMCC PPC4xx crypto accelerator");
diff --git a/drivers/crypto/amcc/crypto4xx_core.h b/drivers/crypto/amcc/crypto4xx_core.h
new file mode 100644
index 000000000..21a6bbced
--- /dev/null
+++ b/drivers/crypto/amcc/crypto4xx_core.h
@@ -0,0 +1,250 @@
+/**
+ * AMCC SoC PPC4xx Crypto Driver
+ *
+ * Copyright (c) 2008 Applied Micro Circuits Corporation.
+ * All rights reserved. James Hsiao <jhsiao@amcc.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * This is the header file for AMCC Crypto offload Linux device driver for
+ * use with Linux CryptoAPI.
+
+ */
+
+#ifndef __CRYPTO4XX_CORE_H__
+#define __CRYPTO4XX_CORE_H__
+
+#include <linux/ratelimit.h>
+#include <crypto/internal/hash.h>
+#include <crypto/internal/aead.h>
+#include <crypto/internal/skcipher.h>
+#include "crypto4xx_reg_def.h"
+#include "crypto4xx_sa.h"
+
+#define PPC460SX_SDR0_SRST                      0x201
+#define PPC405EX_SDR0_SRST                      0x200
+#define PPC460EX_SDR0_SRST                      0x201
+#define PPC460EX_CE_RESET                       0x08000000
+#define PPC460SX_CE_RESET                       0x20000000
+#define PPC405EX_CE_RESET                       0x00000008
+
+#define CRYPTO4XX_CRYPTO_PRIORITY		300
+#define PPC4XX_NUM_PD				256
+#define PPC4XX_LAST_PD				(PPC4XX_NUM_PD - 1)
+#define PPC4XX_NUM_GD				1024
+#define PPC4XX_LAST_GD				(PPC4XX_NUM_GD - 1)
+#define PPC4XX_NUM_SD				256
+#define PPC4XX_LAST_SD				(PPC4XX_NUM_SD - 1)
+#define PPC4XX_SD_BUFFER_SIZE			2048
+
+#define PD_ENTRY_BUSY				BIT(1)
+#define PD_ENTRY_INUSE				BIT(0)
+#define PD_ENTRY_FREE				0
+#define ERING_WAS_FULL				0xffffffff
+
+struct crypto4xx_device;
+
+union shadow_sa_buf {
+	struct dynamic_sa_ctl sa;
+
+	/* alloc 256 bytes which is enough for any kind of dynamic sa */
+	u8 buf[256];
+} __packed;
+
+struct pd_uinfo {
+	struct crypto4xx_device *dev;
+	u32   state;
+	u32 using_sd;
+	u32 first_gd;		/* first gather discriptor
+				used by this packet */
+	u32 num_gd;             /* number of gather discriptor
+				used by this packet */
+	u32 first_sd;		/* first scatter discriptor
+				used by this packet */
+	u32 num_sd;		/* number of scatter discriptors
+				used by this packet */
+	struct dynamic_sa_ctl *sa_va;	/* shadow sa */
+	struct sa_state_record *sr_va;	/* state record for shadow sa */
+	u32 sr_pa;
+	struct scatterlist *dest_va;
+	struct crypto_async_request *async_req; 	/* base crypto request
+							for this packet */
+};
+
+struct crypto4xx_device {
+	struct crypto4xx_core_device *core_dev;
+	void __iomem *ce_base;
+	void __iomem *trng_base;
+
+	struct ce_pd *pdr;	/* base address of packet descriptor ring */
+	dma_addr_t pdr_pa;	/* physical address of pdr_base_register */
+	struct ce_gd *gdr;	/* gather descriptor ring */
+	dma_addr_t gdr_pa;	/* physical address of gdr_base_register */
+	struct ce_sd *sdr;	/* scatter descriptor ring */
+	dma_addr_t sdr_pa;	/* physical address of sdr_base_register */
+	void *scatter_buffer_va;
+	dma_addr_t scatter_buffer_pa;
+
+	union shadow_sa_buf *shadow_sa_pool;
+	dma_addr_t shadow_sa_pool_pa;
+	struct sa_state_record *shadow_sr_pool;
+	dma_addr_t shadow_sr_pool_pa;
+	u32 pdr_tail;
+	u32 pdr_head;
+	u32 gdr_tail;
+	u32 gdr_head;
+	u32 sdr_tail;
+	u32 sdr_head;
+	struct pd_uinfo *pdr_uinfo;
+	struct list_head alg_list;	/* List of algorithm supported
+					by this device */
+	struct ratelimit_state aead_ratelimit;
+	bool is_revb;
+};
+
+struct crypto4xx_core_device {
+	struct device *device;
+	struct platform_device *ofdev;
+	struct crypto4xx_device *dev;
+	struct hwrng *trng;
+	u32 int_status;
+	u32 irq;
+	struct tasklet_struct tasklet;
+	spinlock_t lock;
+};
+
+struct crypto4xx_ctx {
+	struct crypto4xx_device *dev;
+	struct dynamic_sa_ctl *sa_in;
+	struct dynamic_sa_ctl *sa_out;
+	__le32 iv_nonce;
+	u32 sa_len;
+	union {
+		struct crypto_skcipher *cipher;
+		struct crypto_aead *aead;
+	} sw_cipher;
+};
+
+struct crypto4xx_aead_reqctx {
+	struct scatterlist dst[2];
+};
+
+struct crypto4xx_alg_common {
+	u32 type;
+	union {
+		struct skcipher_alg cipher;
+		struct ahash_alg hash;
+		struct aead_alg aead;
+	} u;
+};
+
+struct crypto4xx_alg {
+	struct list_head  entry;
+	struct crypto4xx_alg_common alg;
+	struct crypto4xx_device *dev;
+};
+
+int crypto4xx_alloc_sa(struct crypto4xx_ctx *ctx, u32 size);
+void crypto4xx_free_sa(struct crypto4xx_ctx *ctx);
+void crypto4xx_free_ctx(struct crypto4xx_ctx *ctx);
+int crypto4xx_build_pd(struct crypto_async_request *req,
+		       struct crypto4xx_ctx *ctx,
+		       struct scatterlist *src,
+		       struct scatterlist *dst,
+		       const unsigned int datalen,
+		       const __le32 *iv, const u32 iv_len,
+		       const struct dynamic_sa_ctl *sa,
+		       const unsigned int sa_len,
+		       const unsigned int assoclen,
+		       struct scatterlist *dst_tmp);
+int crypto4xx_setkey_aes_cbc(struct crypto_skcipher *cipher,
+			     const u8 *key, unsigned int keylen);
+int crypto4xx_setkey_aes_cfb(struct crypto_skcipher *cipher,
+			     const u8 *key, unsigned int keylen);
+int crypto4xx_setkey_aes_ctr(struct crypto_skcipher *cipher,
+			     const u8 *key, unsigned int keylen);
+int crypto4xx_setkey_aes_ecb(struct crypto_skcipher *cipher,
+			     const u8 *key, unsigned int keylen);
+int crypto4xx_setkey_aes_ofb(struct crypto_skcipher *cipher,
+			     const u8 *key, unsigned int keylen);
+int crypto4xx_setkey_rfc3686(struct crypto_skcipher *cipher,
+			     const u8 *key, unsigned int keylen);
+int crypto4xx_encrypt_ctr(struct skcipher_request *req);
+int crypto4xx_decrypt_ctr(struct skcipher_request *req);
+int crypto4xx_encrypt_iv_stream(struct skcipher_request *req);
+int crypto4xx_decrypt_iv_stream(struct skcipher_request *req);
+int crypto4xx_encrypt_iv_block(struct skcipher_request *req);
+int crypto4xx_decrypt_iv_block(struct skcipher_request *req);
+int crypto4xx_encrypt_noiv_block(struct skcipher_request *req);
+int crypto4xx_decrypt_noiv_block(struct skcipher_request *req);
+int crypto4xx_rfc3686_encrypt(struct skcipher_request *req);
+int crypto4xx_rfc3686_decrypt(struct skcipher_request *req);
+int crypto4xx_sha1_alg_init(struct crypto_tfm *tfm);
+int crypto4xx_hash_digest(struct ahash_request *req);
+int crypto4xx_hash_final(struct ahash_request *req);
+int crypto4xx_hash_update(struct ahash_request *req);
+int crypto4xx_hash_init(struct ahash_request *req);
+
+/**
+ * Note: Only use this function to copy items that is word aligned.
+ */
+static inline void crypto4xx_memcpy_swab32(u32 *dst, const void *buf,
+					   size_t len)
+{
+	for (; len >= 4; buf += 4, len -= 4)
+		*dst++ = __swab32p((u32 *) buf);
+
+	if (len) {
+		const u8 *tmp = (u8 *)buf;
+
+		switch (len) {
+		case 3:
+			*dst = (tmp[2] << 16) |
+			       (tmp[1] << 8) |
+			       tmp[0];
+			break;
+		case 2:
+			*dst = (tmp[1] << 8) |
+			       tmp[0];
+			break;
+		case 1:
+			*dst = tmp[0];
+			break;
+		default:
+			break;
+		}
+	}
+}
+
+static inline void crypto4xx_memcpy_from_le32(u32 *dst, const void *buf,
+					      size_t len)
+{
+	crypto4xx_memcpy_swab32(dst, buf, len);
+}
+
+static inline void crypto4xx_memcpy_to_le32(__le32 *dst, const void *buf,
+					    size_t len)
+{
+	crypto4xx_memcpy_swab32((u32 *)dst, buf, len);
+}
+
+int crypto4xx_setauthsize_aead(struct crypto_aead *ciper,
+			       unsigned int authsize);
+int crypto4xx_setkey_aes_ccm(struct crypto_aead *cipher,
+			     const u8 *key, unsigned int keylen);
+int crypto4xx_encrypt_aes_ccm(struct aead_request *req);
+int crypto4xx_decrypt_aes_ccm(struct aead_request *req);
+int crypto4xx_setkey_aes_gcm(struct crypto_aead *cipher,
+			     const u8 *key, unsigned int keylen);
+int crypto4xx_encrypt_aes_gcm(struct aead_request *req);
+int crypto4xx_decrypt_aes_gcm(struct aead_request *req);
+
+#endif
diff --git a/drivers/crypto/amcc/crypto4xx_reg_def.h b/drivers/crypto/amcc/crypto4xx_reg_def.h
new file mode 100644
index 000000000..472331787
--- /dev/null
+++ b/drivers/crypto/amcc/crypto4xx_reg_def.h
@@ -0,0 +1,290 @@
+/**
+ * AMCC SoC PPC4xx Crypto Driver
+ *
+ * Copyright (c) 2008 Applied Micro Circuits Corporation.
+ * All rights reserved. James Hsiao <jhsiao@amcc.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * This filr defines the register set for Security Subsystem
+ */
+
+#ifndef __CRYPTO4XX_REG_DEF_H__
+#define __CRYPTO4XX_REG_DEF_H__
+
+/* CRYPTO4XX Register offset */
+#define CRYPTO4XX_DESCRIPTOR			0x00000000
+#define CRYPTO4XX_CTRL_STAT			0x00000000
+#define CRYPTO4XX_SOURCE			0x00000004
+#define CRYPTO4XX_DEST				0x00000008
+#define CRYPTO4XX_SA				0x0000000C
+#define CRYPTO4XX_SA_LENGTH			0x00000010
+#define CRYPTO4XX_LENGTH			0x00000014
+
+#define CRYPTO4XX_PE_DMA_CFG			0x00000040
+#define CRYPTO4XX_PE_DMA_STAT			0x00000044
+#define CRYPTO4XX_PDR_BASE			0x00000048
+#define CRYPTO4XX_RDR_BASE			0x0000004c
+#define CRYPTO4XX_RING_SIZE			0x00000050
+#define CRYPTO4XX_RING_CTRL			0x00000054
+#define CRYPTO4XX_INT_RING_STAT			0x00000058
+#define CRYPTO4XX_EXT_RING_STAT			0x0000005c
+#define CRYPTO4XX_IO_THRESHOLD			0x00000060
+#define CRYPTO4XX_GATH_RING_BASE		0x00000064
+#define CRYPTO4XX_SCAT_RING_BASE		0x00000068
+#define CRYPTO4XX_PART_RING_SIZE		0x0000006c
+#define CRYPTO4XX_PART_RING_CFG		        0x00000070
+
+#define CRYPTO4XX_PDR_BASE_UADDR		0x00000080
+#define CRYPTO4XX_RDR_BASE_UADDR		0x00000084
+#define CRYPTO4XX_PKT_SRC_UADDR			0x00000088
+#define CRYPTO4XX_PKT_DEST_UADDR		0x0000008c
+#define CRYPTO4XX_SA_UADDR			0x00000090
+#define CRYPTO4XX_GATH_RING_BASE_UADDR		0x000000A0
+#define CRYPTO4XX_SCAT_RING_BASE_UADDR		0x000000A4
+
+#define CRYPTO4XX_SEQ_RD			0x00000408
+#define CRYPTO4XX_SEQ_MASK_RD			0x0000040C
+
+#define CRYPTO4XX_SA_CMD_0			0x00010600
+#define CRYPTO4XX_SA_CMD_1			0x00010604
+
+#define CRYPTO4XX_STATE_PTR			0x000106dc
+#define CRYPTO4XX_STATE_IV			0x00010700
+#define CRYPTO4XX_STATE_HASH_BYTE_CNT_0		0x00010710
+#define CRYPTO4XX_STATE_HASH_BYTE_CNT_1		0x00010714
+
+#define CRYPTO4XX_STATE_IDIGEST_0		0x00010718
+#define CRYPTO4XX_STATE_IDIGEST_1		0x0001071c
+
+#define CRYPTO4XX_DATA_IN			0x00018000
+#define CRYPTO4XX_DATA_OUT			0x0001c000
+
+#define CRYPTO4XX_INT_UNMASK_STAT		0x000500a0
+#define CRYPTO4XX_INT_MASK_STAT			0x000500a4
+#define CRYPTO4XX_INT_CLR			0x000500a4
+#define CRYPTO4XX_INT_EN			0x000500a8
+
+#define CRYPTO4XX_INT_PKA			0x00000002
+#define CRYPTO4XX_INT_PDR_DONE			0x00008000
+#define CRYPTO4XX_INT_MA_WR_ERR			0x00020000
+#define CRYPTO4XX_INT_MA_RD_ERR			0x00010000
+#define CRYPTO4XX_INT_PE_ERR			0x00000200
+#define CRYPTO4XX_INT_USER_DMA_ERR		0x00000040
+#define CRYPTO4XX_INT_SLAVE_ERR			0x00000010
+#define CRYPTO4XX_INT_MASTER_ERR		0x00000008
+#define CRYPTO4XX_INT_ERROR			0x00030258
+
+#define CRYPTO4XX_INT_CFG			0x000500ac
+#define CRYPTO4XX_INT_DESCR_RD			0x000500b0
+#define CRYPTO4XX_INT_DESCR_CNT			0x000500b4
+#define CRYPTO4XX_INT_TIMEOUT_CNT		0x000500b8
+
+#define CRYPTO4XX_DEVICE_CTRL			0x00060080
+#define CRYPTO4XX_DEVICE_ID			0x00060084
+#define CRYPTO4XX_DEVICE_INFO			0x00060088
+#define CRYPTO4XX_DMA_USER_SRC			0x00060094
+#define CRYPTO4XX_DMA_USER_DEST			0x00060098
+#define CRYPTO4XX_DMA_USER_CMD			0x0006009C
+
+#define CRYPTO4XX_DMA_CFG	        	0x000600d4
+#define CRYPTO4XX_BYTE_ORDER_CFG 		0x000600d8
+#define CRYPTO4XX_ENDIAN_CFG			0x000600d8
+
+#define CRYPTO4XX_PRNG_STAT			0x00070000
+#define CRYPTO4XX_PRNG_CTRL			0x00070004
+#define CRYPTO4XX_PRNG_SEED_L			0x00070008
+#define CRYPTO4XX_PRNG_SEED_H			0x0007000c
+
+#define CRYPTO4XX_PRNG_RES_0			0x00070020
+#define CRYPTO4XX_PRNG_RES_1			0x00070024
+#define CRYPTO4XX_PRNG_RES_2			0x00070028
+#define CRYPTO4XX_PRNG_RES_3			0x0007002C
+
+#define CRYPTO4XX_PRNG_LFSR_L			0x00070030
+#define CRYPTO4XX_PRNG_LFSR_H			0x00070034
+
+/**
+ * Initialize CRYPTO ENGINE registers, and memory bases.
+ */
+#define PPC4XX_PDR_POLL				0x3ff
+#define PPC4XX_OUTPUT_THRESHOLD			2
+#define PPC4XX_INPUT_THRESHOLD			2
+#define PPC4XX_PD_SIZE				6
+#define PPC4XX_CTX_DONE_INT			0x2000
+#define PPC4XX_PD_DONE_INT			0x8000
+#define PPC4XX_TMO_ERR_INT			0x40000
+#define PPC4XX_BYTE_ORDER			0x22222
+#define PPC4XX_INTERRUPT_CLR			0x3ffff
+#define PPC4XX_PRNG_CTRL_AUTO_EN		0x3
+#define PPC4XX_DC_3DES_EN			1
+#define PPC4XX_TRNG_EN				0x00020000
+#define PPC4XX_INT_DESCR_CNT			7
+#define PPC4XX_INT_TIMEOUT_CNT			0
+#define PPC4XX_INT_TIMEOUT_CNT_REVB		0x3FF
+#define PPC4XX_INT_CFG				1
+/**
+ * all follow define are ad hoc
+ */
+#define PPC4XX_RING_RETRY			100
+#define PPC4XX_RING_POLL			100
+#define PPC4XX_SDR_SIZE				PPC4XX_NUM_SD
+#define PPC4XX_GDR_SIZE				PPC4XX_NUM_GD
+
+/**
+  * Generic Security Association (SA) with all possible fields. These will
+ * never likely used except for reference purpose. These structure format
+ * can be not changed as the hardware expects them to be layout as defined.
+ * Field can be removed or reduced but ordering can not be changed.
+ */
+#define CRYPTO4XX_DMA_CFG_OFFSET		0x40
+union ce_pe_dma_cfg {
+	struct {
+		u32 rsv:7;
+		u32 dir_host:1;
+		u32 rsv1:2;
+		u32 bo_td_en:1;
+		u32 dis_pdr_upd:1;
+		u32 bo_sgpd_en:1;
+		u32 bo_data_en:1;
+		u32 bo_sa_en:1;
+		u32 bo_pd_en:1;
+		u32 rsv2:4;
+		u32 dynamic_sa_en:1;
+		u32 pdr_mode:2;
+		u32 pe_mode:1;
+		u32 rsv3:5;
+		u32 reset_sg:1;
+		u32 reset_pdr:1;
+		u32 reset_pe:1;
+	} bf;
+    u32 w;
+} __attribute__((packed));
+
+#define CRYPTO4XX_PDR_BASE_OFFSET		0x48
+#define CRYPTO4XX_RDR_BASE_OFFSET		0x4c
+#define CRYPTO4XX_RING_SIZE_OFFSET		0x50
+union ce_ring_size {
+	struct {
+		u32 ring_offset:16;
+		u32 rsv:6;
+		u32 ring_size:10;
+	} bf;
+    u32 w;
+} __attribute__((packed));
+
+#define CRYPTO4XX_RING_CONTROL_OFFSET		0x54
+union ce_ring_control {
+	struct {
+		u32 continuous:1;
+		u32 rsv:5;
+		u32 ring_retry_divisor:10;
+		u32 rsv1:4;
+		u32 ring_poll_divisor:10;
+	} bf;
+    u32 w;
+} __attribute__((packed));
+
+#define CRYPTO4XX_IO_THRESHOLD_OFFSET		0x60
+union ce_io_threshold {
+	struct {
+		u32 rsv:6;
+		u32 output_threshold:10;
+		u32 rsv1:6;
+		u32 input_threshold:10;
+	} bf;
+    u32 w;
+} __attribute__((packed));
+
+#define CRYPTO4XX_GATHER_RING_BASE_OFFSET	0x64
+#define CRYPTO4XX_SCATTER_RING_BASE_OFFSET	0x68
+
+union ce_part_ring_size  {
+	struct {
+		u32 sdr_size:16;
+		u32 gdr_size:16;
+	} bf;
+    u32 w;
+} __attribute__((packed));
+
+#define MAX_BURST_SIZE_32			0
+#define MAX_BURST_SIZE_64			1
+#define MAX_BURST_SIZE_128			2
+#define MAX_BURST_SIZE_256			3
+
+/* gather descriptor control length */
+struct gd_ctl_len {
+	u32 len:16;
+	u32 rsv:14;
+	u32 done:1;
+	u32 ready:1;
+} __attribute__((packed));
+
+struct ce_gd {
+	u32 ptr;
+	struct gd_ctl_len ctl_len;
+} __attribute__((packed));
+
+struct sd_ctl {
+	u32 ctl:30;
+	u32 done:1;
+	u32 rdy:1;
+} __attribute__((packed));
+
+struct ce_sd {
+    u32 ptr;
+	struct sd_ctl ctl;
+} __attribute__((packed));
+
+#define PD_PAD_CTL_32	0x10
+#define PD_PAD_CTL_64	0x20
+#define PD_PAD_CTL_128	0x40
+#define PD_PAD_CTL_256	0x80
+union ce_pd_ctl {
+	struct {
+		u32 pd_pad_ctl:8;
+		u32 status:8;
+		u32 next_hdr:8;
+		u32 rsv:2;
+		u32 cached_sa:1;
+		u32 hash_final:1;
+		u32 init_arc4:1;
+		u32 rsv1:1;
+		u32 pe_done:1;
+		u32 host_ready:1;
+	} bf;
+	u32 w;
+} __attribute__((packed));
+#define PD_CTL_HASH_FINAL	BIT(4)
+#define PD_CTL_PE_DONE		BIT(1)
+#define PD_CTL_HOST_READY	BIT(0)
+
+union ce_pd_ctl_len {
+	struct {
+		u32 bypass:8;
+		u32 pe_done:1;
+		u32 host_ready:1;
+		u32 rsv:2;
+		u32 pkt_len:20;
+	} bf;
+	u32 w;
+} __attribute__((packed));
+
+struct ce_pd {
+	union ce_pd_ctl   pd_ctl;
+	u32 src;
+	u32 dest;
+	u32 sa;                 /* get from ctx->sa_dma_addr */
+	u32 sa_len;             /* only if dynamic sa is used */
+	union ce_pd_ctl_len pd_ctl_len;
+
+} __attribute__((packed));
+#endif
diff --git a/drivers/crypto/amcc/crypto4xx_sa.h b/drivers/crypto/amcc/crypto4xx_sa.h
new file mode 100644
index 000000000..a4d403528
--- /dev/null
+++ b/drivers/crypto/amcc/crypto4xx_sa.h
@@ -0,0 +1,318 @@
+/**
+ * AMCC SoC PPC4xx Crypto Driver
+ *
+ * Copyright (c) 2008 Applied Micro Circuits Corporation.
+ * All rights reserved. James Hsiao <jhsiao@amcc.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * This file defines the security context
+ * associate format.
+ */
+
+#ifndef __CRYPTO4XX_SA_H__
+#define __CRYPTO4XX_SA_H__
+
+#define AES_IV_SIZE				16
+
+/**
+ * Contents of Dynamic Security Association (SA) with all possible fields
+ */
+union dynamic_sa_contents {
+	struct {
+		u32 arc4_state_ptr:1;
+		u32 arc4_ij_ptr:1;
+		u32 state_ptr:1;
+		u32 iv3:1;
+		u32 iv2:1;
+		u32 iv1:1;
+		u32 iv0:1;
+		u32 seq_num_mask3:1;
+		u32 seq_num_mask2:1;
+		u32 seq_num_mask1:1;
+		u32 seq_num_mask0:1;
+		u32 seq_num1:1;
+		u32 seq_num0:1;
+		u32 spi:1;
+		u32 outer_size:5;
+		u32 inner_size:5;
+		u32 key_size:4;
+		u32 cmd_size:4;
+	} bf;
+	u32 w;
+} __attribute__((packed));
+
+#define DIR_OUTBOUND				0
+#define DIR_INBOUND				1
+#define SA_OP_GROUP_BASIC			0
+#define SA_OPCODE_ENCRYPT			0
+#define SA_OPCODE_DECRYPT			0
+#define SA_OPCODE_ENCRYPT_HASH			1
+#define SA_OPCODE_HASH_DECRYPT			1
+#define SA_OPCODE_HASH				3
+#define SA_CIPHER_ALG_DES			0
+#define SA_CIPHER_ALG_3DES			1
+#define SA_CIPHER_ALG_ARC4			2
+#define SA_CIPHER_ALG_AES			3
+#define SA_CIPHER_ALG_KASUMI			4
+#define SA_CIPHER_ALG_NULL			15
+
+#define SA_HASH_ALG_MD5				0
+#define SA_HASH_ALG_SHA1			1
+#define SA_HASH_ALG_GHASH			12
+#define SA_HASH_ALG_CBC_MAC			14
+#define SA_HASH_ALG_NULL			15
+#define SA_HASH_ALG_SHA1_DIGEST_SIZE		20
+
+#define SA_LOAD_HASH_FROM_SA			0
+#define SA_LOAD_HASH_FROM_STATE			2
+#define SA_NOT_LOAD_HASH			3
+#define SA_LOAD_IV_FROM_SA			0
+#define SA_LOAD_IV_FROM_INPUT			1
+#define SA_LOAD_IV_FROM_STATE			2
+#define SA_LOAD_IV_GEN_IV			3
+
+#define SA_PAD_TYPE_CONSTANT			2
+#define SA_PAD_TYPE_ZERO			3
+#define SA_PAD_TYPE_TLS				5
+#define SA_PAD_TYPE_DTLS			5
+#define SA_NOT_SAVE_HASH			0
+#define SA_SAVE_HASH				1
+#define SA_NOT_SAVE_IV				0
+#define SA_SAVE_IV				1
+#define SA_HEADER_PROC				1
+#define SA_NO_HEADER_PROC			0
+
+union sa_command_0 {
+	struct {
+		u32 scatter:1;
+		u32 gather:1;
+		u32 save_hash_state:1;
+		u32 save_iv:1;
+		u32 load_hash_state:2;
+		u32 load_iv:2;
+		u32 digest_len:4;
+		u32 hdr_proc:1;
+		u32 extend_pad:1;
+		u32 stream_cipher_pad:1;
+		u32 rsv:1;
+		u32 hash_alg:4;
+		u32 cipher_alg:4;
+		u32 pad_type:2;
+		u32 op_group:2;
+		u32 dir:1;
+		u32 opcode:3;
+	} bf;
+	u32 w;
+} __attribute__((packed));
+
+#define CRYPTO_MODE_ECB				0
+#define CRYPTO_MODE_CBC				1
+#define CRYPTO_MODE_OFB				2
+#define CRYPTO_MODE_CFB				3
+#define CRYPTO_MODE_CTR				4
+
+#define CRYPTO_FEEDBACK_MODE_NO_FB		0
+#define CRYPTO_FEEDBACK_MODE_64BIT_OFB		0
+#define CRYPTO_FEEDBACK_MODE_8BIT_CFB		1
+#define CRYPTO_FEEDBACK_MODE_1BIT_CFB		2
+#define CRYPTO_FEEDBACK_MODE_128BIT_CFB		3
+
+#define SA_AES_KEY_LEN_128			2
+#define SA_AES_KEY_LEN_192			3
+#define SA_AES_KEY_LEN_256			4
+
+#define SA_REV2					1
+/**
+ * The follow defines bits sa_command_1
+ * In Basic hash mode  this bit define simple hash or hmac.
+ * In IPsec mode, this bit define muting control.
+ */
+#define SA_HASH_MODE_HASH			0
+#define SA_HASH_MODE_HMAC			1
+#define SA_MC_ENABLE				0
+#define SA_MC_DISABLE				1
+#define SA_NOT_COPY_HDR				0
+#define SA_COPY_HDR				1
+#define SA_NOT_COPY_PAD				0
+#define SA_COPY_PAD				1
+#define SA_NOT_COPY_PAYLOAD			0
+#define SA_COPY_PAYLOAD				1
+#define SA_EXTENDED_SN_OFF			0
+#define SA_EXTENDED_SN_ON			1
+#define SA_SEQ_MASK_OFF				0
+#define SA_SEQ_MASK_ON				1
+
+union sa_command_1 {
+	struct {
+		u32 crypto_mode31:1;
+		u32 save_arc4_state:1;
+		u32 arc4_stateful:1;
+		u32 key_len:5;
+		u32 hash_crypto_offset:8;
+		u32 sa_rev:2;
+		u32 byte_offset:1;
+		u32 hmac_muting:1;
+		u32 feedback_mode:2;
+		u32 crypto_mode9_8:2;
+		u32 extended_seq_num:1;
+		u32 seq_num_mask:1;
+		u32 mutable_bit_proc:1;
+		u32 ip_version:1;
+		u32 copy_pad:1;
+		u32 copy_payload:1;
+		u32 copy_hdr:1;
+		u32 rsv1:1;
+	} bf;
+	u32 w;
+} __attribute__((packed));
+
+struct dynamic_sa_ctl {
+	union dynamic_sa_contents sa_contents;
+	union sa_command_0 sa_command_0;
+	union sa_command_1 sa_command_1;
+} __attribute__((packed));
+
+/**
+ * State Record for Security Association (SA)
+ */
+struct  sa_state_record {
+	__le32 save_iv[4];
+	__le32 save_hash_byte_cnt[2];
+	union {
+		u32 save_digest[16]; /* for MD5/SHA */
+		__le32 save_digest_le32[16]; /* GHASH / CBC */
+	};
+} __attribute__((packed));
+
+/**
+ * Security Association (SA) for AES128
+ *
+ */
+struct dynamic_sa_aes128 {
+	struct dynamic_sa_ctl	ctrl;
+	__le32 key[4];
+	__le32 iv[4]; /* for CBC, OFC, and CFB mode */
+	u32 state_ptr;
+	u32 reserved;
+} __attribute__((packed));
+
+#define SA_AES128_LEN		(sizeof(struct dynamic_sa_aes128)/4)
+#define SA_AES128_CONTENTS	0x3e000042
+
+/*
+ * Security Association (SA) for AES192
+ */
+struct dynamic_sa_aes192 {
+	struct dynamic_sa_ctl ctrl;
+	__le32 key[6];
+	__le32 iv[4]; /* for CBC, OFC, and CFB mode */
+	u32 state_ptr;
+	u32 reserved;
+} __attribute__((packed));
+
+#define SA_AES192_LEN		(sizeof(struct dynamic_sa_aes192)/4)
+#define SA_AES192_CONTENTS	0x3e000062
+
+/**
+ * Security Association (SA) for AES256
+ */
+struct dynamic_sa_aes256 {
+	struct dynamic_sa_ctl ctrl;
+	__le32 key[8];
+	__le32 iv[4]; /* for CBC, OFC, and CFB mode */
+	u32 state_ptr;
+	u32 reserved;
+} __attribute__((packed));
+
+#define SA_AES256_LEN		(sizeof(struct dynamic_sa_aes256)/4)
+#define SA_AES256_CONTENTS	0x3e000082
+#define SA_AES_CONTENTS		0x3e000002
+
+/**
+ * Security Association (SA) for AES128 CCM
+ */
+struct dynamic_sa_aes128_ccm {
+	struct dynamic_sa_ctl ctrl;
+	__le32 key[4];
+	__le32 iv[4];
+	u32 state_ptr;
+	u32 reserved;
+} __packed;
+#define SA_AES128_CCM_LEN	(sizeof(struct dynamic_sa_aes128_ccm)/4)
+#define SA_AES128_CCM_CONTENTS	0x3e000042
+#define SA_AES_CCM_CONTENTS	0x3e000002
+
+/**
+ * Security Association (SA) for AES128_GCM
+ */
+struct dynamic_sa_aes128_gcm {
+	struct dynamic_sa_ctl ctrl;
+	__le32 key[4];
+	__le32 inner_digest[4];
+	__le32 iv[4];
+	u32 state_ptr;
+	u32 reserved;
+} __packed;
+
+#define SA_AES128_GCM_LEN	(sizeof(struct dynamic_sa_aes128_gcm)/4)
+#define SA_AES128_GCM_CONTENTS	0x3e000442
+#define SA_AES_GCM_CONTENTS	0x3e000402
+
+/**
+ * Security Association (SA) for HASH160: HMAC-SHA1
+ */
+struct dynamic_sa_hash160 {
+	struct dynamic_sa_ctl ctrl;
+	__le32 inner_digest[5];
+	__le32 outer_digest[5];
+	u32 state_ptr;
+	u32 reserved;
+} __attribute__((packed));
+#define SA_HASH160_LEN		(sizeof(struct dynamic_sa_hash160)/4)
+#define SA_HASH160_CONTENTS     0x2000a502
+
+static inline u32
+get_dynamic_sa_offset_state_ptr_field(struct dynamic_sa_ctl *cts)
+{
+	u32 offset;
+
+	offset = cts->sa_contents.bf.key_size
+		+ cts->sa_contents.bf.inner_size
+		+ cts->sa_contents.bf.outer_size
+		+ cts->sa_contents.bf.spi
+		+ cts->sa_contents.bf.seq_num0
+		+ cts->sa_contents.bf.seq_num1
+		+ cts->sa_contents.bf.seq_num_mask0
+		+ cts->sa_contents.bf.seq_num_mask1
+		+ cts->sa_contents.bf.seq_num_mask2
+		+ cts->sa_contents.bf.seq_num_mask3
+		+ cts->sa_contents.bf.iv0
+		+ cts->sa_contents.bf.iv1
+		+ cts->sa_contents.bf.iv2
+		+ cts->sa_contents.bf.iv3;
+
+	return sizeof(struct dynamic_sa_ctl) + offset * 4;
+}
+
+static inline __le32 *get_dynamic_sa_key_field(struct dynamic_sa_ctl *cts)
+{
+	return (__le32 *) ((unsigned long)cts + sizeof(struct dynamic_sa_ctl));
+}
+
+static inline __le32 *get_dynamic_sa_inner_digest(struct dynamic_sa_ctl *cts)
+{
+	return (__le32 *) ((unsigned long)cts +
+		sizeof(struct dynamic_sa_ctl) +
+		cts->sa_contents.bf.key_size * 4);
+}
+
+#endif
diff --git a/drivers/crypto/amcc/crypto4xx_trng.c b/drivers/crypto/amcc/crypto4xx_trng.c
new file mode 100644
index 000000000..8a3ed4031
--- /dev/null
+++ b/drivers/crypto/amcc/crypto4xx_trng.c
@@ -0,0 +1,132 @@
+/*
+ * Generic PowerPC 44x RNG driver
+ *
+ * Copyright 2011 IBM Corporation
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; version 2 of the License.
+ */
+
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/interrupt.h>
+#include <linux/platform_device.h>
+#include <linux/hw_random.h>
+#include <linux/delay.h>
+#include <linux/of_address.h>
+#include <linux/of_platform.h>
+#include <linux/io.h>
+
+#include "crypto4xx_core.h"
+#include "crypto4xx_trng.h"
+#include "crypto4xx_reg_def.h"
+
+#define PPC4XX_TRNG_CTRL	0x0008
+#define PPC4XX_TRNG_CTRL_DALM	0x20
+#define PPC4XX_TRNG_STAT	0x0004
+#define PPC4XX_TRNG_STAT_B	0x1
+#define PPC4XX_TRNG_DATA	0x0000
+
+static int ppc4xx_trng_data_present(struct hwrng *rng, int wait)
+{
+	struct crypto4xx_device *dev = (void *)rng->priv;
+	int busy, i, present = 0;
+
+	for (i = 0; i < 20; i++) {
+		busy = (in_le32(dev->trng_base + PPC4XX_TRNG_STAT) &
+			PPC4XX_TRNG_STAT_B);
+		if (!busy || !wait) {
+			present = 1;
+			break;
+		}
+		udelay(10);
+	}
+	return present;
+}
+
+static int ppc4xx_trng_data_read(struct hwrng *rng, u32 *data)
+{
+	struct crypto4xx_device *dev = (void *)rng->priv;
+	*data = in_le32(dev->trng_base + PPC4XX_TRNG_DATA);
+	return 4;
+}
+
+static void ppc4xx_trng_enable(struct crypto4xx_device *dev, bool enable)
+{
+	u32 device_ctrl;
+
+	device_ctrl = readl(dev->ce_base + CRYPTO4XX_DEVICE_CTRL);
+	if (enable)
+		device_ctrl |= PPC4XX_TRNG_EN;
+	else
+		device_ctrl &= ~PPC4XX_TRNG_EN;
+	writel(device_ctrl, dev->ce_base + CRYPTO4XX_DEVICE_CTRL);
+}
+
+static const struct of_device_id ppc4xx_trng_match[] = {
+	{ .compatible = "ppc4xx-rng", },
+	{ .compatible = "amcc,ppc460ex-rng", },
+	{ .compatible = "amcc,ppc440epx-rng", },
+	{},
+};
+
+void ppc4xx_trng_probe(struct crypto4xx_core_device *core_dev)
+{
+	struct crypto4xx_device *dev = core_dev->dev;
+	struct device_node *trng = NULL;
+	struct hwrng *rng = NULL;
+	int err;
+
+	/* Find the TRNG device node and map it */
+	trng = of_find_matching_node(NULL, ppc4xx_trng_match);
+	if (!trng || !of_device_is_available(trng)) {
+		of_node_put(trng);
+		return;
+	}
+
+	dev->trng_base = of_iomap(trng, 0);
+	of_node_put(trng);
+	if (!dev->trng_base)
+		goto err_out;
+
+	rng = kzalloc(sizeof(*rng), GFP_KERNEL);
+	if (!rng)
+		goto err_out;
+
+	rng->name = KBUILD_MODNAME;
+	rng->data_present = ppc4xx_trng_data_present;
+	rng->data_read = ppc4xx_trng_data_read;
+	rng->priv = (unsigned long) dev;
+	core_dev->trng = rng;
+	ppc4xx_trng_enable(dev, true);
+	out_le32(dev->trng_base + PPC4XX_TRNG_CTRL, PPC4XX_TRNG_CTRL_DALM);
+	err = devm_hwrng_register(core_dev->device, core_dev->trng);
+	if (err) {
+		ppc4xx_trng_enable(dev, false);
+		dev_err(core_dev->device, "failed to register hwrng (%d).\n",
+			err);
+		goto err_out;
+	}
+	return;
+
+err_out:
+	iounmap(dev->trng_base);
+	kfree(rng);
+	dev->trng_base = NULL;
+	core_dev->trng = NULL;
+}
+
+void ppc4xx_trng_remove(struct crypto4xx_core_device *core_dev)
+{
+	if (core_dev && core_dev->trng) {
+		struct crypto4xx_device *dev = core_dev->dev;
+
+		devm_hwrng_unregister(core_dev->device, core_dev->trng);
+		ppc4xx_trng_enable(dev, false);
+		iounmap(dev->trng_base);
+		kfree(core_dev->trng);
+	}
+}
+
+MODULE_ALIAS("ppc4xx_rng");
diff --git a/drivers/crypto/amcc/crypto4xx_trng.h b/drivers/crypto/amcc/crypto4xx_trng.h
new file mode 100644
index 000000000..7bbda51b7
--- /dev/null
+++ b/drivers/crypto/amcc/crypto4xx_trng.h
@@ -0,0 +1,34 @@
+/**
+ * AMCC SoC PPC4xx Crypto Driver
+ *
+ * Copyright (c) 2008 Applied Micro Circuits Corporation.
+ * All rights reserved. James Hsiao <jhsiao@amcc.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * This file defines the security context
+ * associate format.
+ */
+
+#ifndef __CRYPTO4XX_TRNG_H__
+#define __CRYPTO4XX_TRNG_H__
+
+#ifdef CONFIG_HW_RANDOM_PPC4XX
+void ppc4xx_trng_probe(struct crypto4xx_core_device *core_dev);
+void ppc4xx_trng_remove(struct crypto4xx_core_device *core_dev);
+#else
+static inline void ppc4xx_trng_probe(
+	struct crypto4xx_core_device *dev __maybe_unused) { }
+static inline void ppc4xx_trng_remove(
+	struct crypto4xx_core_device *dev __maybe_unused) { }
+#endif
+
+#endif