crypto: caam - ahash hmac support

caam supports ahash hmac with sha algorithms and md5.

Signed-off-by: Yuan Kang <Yuan.Kang@freescale.com>
Signed-off-by: Kim Phillips <kim.phillips@freescale.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

6 files changed, 1869 insertions, 0 deletions

diff --git a/drivers/crypto/caam/Kconfig b/drivers/crypto/caam/Kconfig
index 2d876bb..e61b7f5 100644
--- a/drivers/crypto/caam/Kconfig
+++ b/drivers/crypto/caam/Kconfig
@@ -70,3 +70,15 @@ config CRYPTO_DEV_FSL_CAAM_CRYPTO_API
 
 	  To compile this as a module, choose M here: the module
 	  will be called caamalg.
+
+config CRYPTO_DEV_FSL_CAAM_AHASH_API
+	tristate "Register hash algorithm implementations with Crypto API"
+	depends on CRYPTO_DEV_FSL_CAAM
+	default y
+	select CRYPTO_AHASH
+	help
+	  Selecting this will offload ahash for users of the
+	  scatterlist crypto API to the SEC4 via job ring.
+
+	  To compile this as a module, choose M here: the module
+	  will be called caamhash.
diff --git a/drivers/crypto/caam/Makefile b/drivers/crypto/caam/Makefile
index 4447e57..9ef1cb0 100644
--- a/drivers/crypto/caam/Makefile
+++ b/drivers/crypto/caam/Makefile
@@ -4,5 +4,6 @@
 
 obj-$(CONFIG_CRYPTO_DEV_FSL_CAAM) += caam.o
 obj-$(CONFIG_CRYPTO_DEV_FSL_CAAM_CRYPTO_API) += caamalg.o
+obj-$(CONFIG_CRYPTO_DEV_FSL_CAAM_AHASH_API) += caamhash.o
 
 caam-objs := ctrl.o jr.o error.o key_gen.o
diff --git a/drivers/crypto/caam/caamhash.c b/drivers/crypto/caam/caamhash.c
new file mode 100644
index 0000000..c0b6d86
--- /dev/null
+++ b/drivers/crypto/caam/caamhash.c
@@ -0,0 +1,1814 @@
+/*
+ * caam - Freescale FSL CAAM support for ahash functions of crypto API
+ *
+ * Copyright 2011 Freescale Semiconductor, Inc.
+ *
+ * Based on caamalg.c crypto API driver.
+ *
+ * relationship of digest job descriptor or first job descriptor after init to
+ * shared descriptors:
+ *
+ * ---------------                     ---------------
+ * | JobDesc #1  |-------------------->|  ShareDesc  |
+ * | *(packet 1) |                     |  (hashKey)  |
+ * ---------------                     | (operation) |
+ *                                     ---------------
+ *
+ * relationship of subsequent job descriptors to shared descriptors:
+ *
+ * ---------------                     ---------------
+ * | JobDesc #2  |-------------------->|  ShareDesc  |
+ * | *(packet 2) |      |------------->|  (hashKey)  |
+ * ---------------      |    |-------->| (operation) |
+ *       .              |    |         | (load ctx2) |
+ *       .              |    |         ---------------
+ * ---------------      |    |
+ * | JobDesc #3  |------|    |
+ * | *(packet 3) |           |
+ * ---------------           |
+ *       .                   |
+ *       .                   |
+ * ---------------           |
+ * | JobDesc #4  |------------
+ * | *(packet 4) |
+ * ---------------
+ *
+ * The SharedDesc never changes for a connection unless rekeyed, but
+ * each packet will likely be in a different place. So all we need
+ * to know to process the packet is where the input is, where the
+ * output goes, and what context we want to process with. Context is
+ * in the SharedDesc, packet references in the JobDesc.
+ *
+ * So, a job desc looks like:
+ *
+ * ---------------------
+ * | Header            |
+ * | ShareDesc Pointer |
+ * | SEQ_OUT_PTR       |
+ * | (output buffer)   |
+ * | (output length)   |
+ * | SEQ_IN_PTR        |
+ * | (input buffer)    |
+ * | (input length)    |
+ * ---------------------
+ */
+
+#include "compat.h"
+
+#include "regs.h"
+#include "intern.h"
+#include "desc_constr.h"
+#include "jr.h"
+#include "error.h"
+#include "sg_sw_sec4.h"
+#include "key_gen.h"
+
+#define CAAM_CRA_PRIORITY		3000
+
+/* max hash key is max split key size */
+#define CAAM_MAX_HASH_KEY_SIZE		(SHA512_DIGEST_SIZE * 2)
+
+#define CAAM_MAX_HASH_BLOCK_SIZE	SHA512_BLOCK_SIZE
+#define CAAM_MAX_HASH_DIGEST_SIZE	SHA512_DIGEST_SIZE
+
+/* length of descriptors text */
+#define DESC_JOB_IO_LEN			(CAAM_CMD_SZ * 5 + CAAM_PTR_SZ * 3)
+
+#define DESC_AHASH_BASE			(4 * CAAM_CMD_SZ)
+#define DESC_AHASH_UPDATE_LEN		(6 * CAAM_CMD_SZ)
+#define DESC_AHASH_UPDATE_FIRST_LEN	(DESC_AHASH_BASE + 4 * CAAM_CMD_SZ)
+#define DESC_AHASH_FINAL_LEN		(DESC_AHASH_BASE + 5 * CAAM_CMD_SZ)
+#define DESC_AHASH_FINUP_LEN		(DESC_AHASH_BASE + 5 * CAAM_CMD_SZ)
+#define DESC_AHASH_DIGEST_LEN		(DESC_AHASH_BASE + 4 * CAAM_CMD_SZ)
+
+#define DESC_HASH_MAX_USED_BYTES	(DESC_AHASH_FINAL_LEN + \
+					 CAAM_MAX_HASH_KEY_SIZE)
+#define DESC_HASH_MAX_USED_LEN		(DESC_HASH_MAX_USED_BYTES / CAAM_CMD_SZ)
+
+/* caam context sizes for hashes: running digest + 8 */
+#define HASH_MSG_LEN			8
+#define MAX_CTX_LEN			(HASH_MSG_LEN + SHA512_DIGEST_SIZE)
+
+#ifdef DEBUG
+/* for print_hex_dumps with line references */
+#define xstr(s) str(s)
+#define str(s) #s
+#define debug(format, arg...) printk(format, arg)
+#else
+#define debug(format, arg...)
+#endif
+
+/* ahash per-session context */
+struct caam_hash_ctx {
+	struct device *jrdev;
+	u32 sh_desc_update[DESC_HASH_MAX_USED_LEN];
+	u32 sh_desc_update_first[DESC_HASH_MAX_USED_LEN];
+	u32 sh_desc_fin[DESC_HASH_MAX_USED_LEN];
+	u32 sh_desc_digest[DESC_HASH_MAX_USED_LEN];
+	u32 sh_desc_finup[DESC_HASH_MAX_USED_LEN];
+	dma_addr_t sh_desc_update_dma;
+	dma_addr_t sh_desc_update_first_dma;
+	dma_addr_t sh_desc_fin_dma;
+	dma_addr_t sh_desc_digest_dma;
+	dma_addr_t sh_desc_finup_dma;
+	u32 alg_type;
+	u32 alg_op;
+	u8 key[CAAM_MAX_HASH_KEY_SIZE];
+	dma_addr_t key_dma;
+	int ctx_len;
+	unsigned int split_key_len;
+	unsigned int split_key_pad_len;
+};
+
+/* ahash state */
+struct caam_hash_state {
+	dma_addr_t buf_dma;
+	dma_addr_t ctx_dma;
+	u8 buf_0[CAAM_MAX_HASH_BLOCK_SIZE] ____cacheline_aligned;
+	int buflen_0;
+	u8 buf_1[CAAM_MAX_HASH_BLOCK_SIZE] ____cacheline_aligned;
+	int buflen_1;
+	u8 caam_ctx[MAX_CTX_LEN];
+	int (*update)(struct ahash_request *req);
+	int (*final)(struct ahash_request *req);
+	int (*finup)(struct ahash_request *req);
+	int current_buf;
+};
+
+/* Common job descriptor seq in/out ptr routines */
+
+/* Map state->caam_ctx, and append seq_out_ptr command that points to it */
+static inline void map_seq_out_ptr_ctx(u32 *desc, struct device *jrdev,
+				       struct caam_hash_state *state,
+				       int ctx_len)
+{
+	state->ctx_dma = dma_map_single(jrdev, state->caam_ctx,
+					ctx_len, DMA_FROM_DEVICE);
+	append_seq_out_ptr(desc, state->ctx_dma, ctx_len, 0);
+}
+
+/* Map req->result, and append seq_out_ptr command that points to it */
+static inline dma_addr_t map_seq_out_ptr_result(u32 *desc, struct device *jrdev,
+						u8 *result, int digestsize)
+{
+	dma_addr_t dst_dma;
+
+	dst_dma = dma_map_single(jrdev, result, digestsize, DMA_FROM_DEVICE);
+	append_seq_out_ptr(desc, dst_dma, digestsize, 0);
+
+	return dst_dma;
+}
+
+/* Map current buffer in state and put it in link table */
+static inline dma_addr_t buf_map_to_sec4_sg(struct device *jrdev,
+					    struct sec4_sg_entry *sec4_sg,
+					    u8 *buf, int buflen)
+{
+	dma_addr_t buf_dma;
+
+	buf_dma = dma_map_single(jrdev, buf, buflen, DMA_TO_DEVICE);
+	dma_to_sec4_sg_one(sec4_sg, buf_dma, buflen, 0);
+
+	return buf_dma;
+}
+
+/* Map req->src and put it in link table */
+static inline void src_map_to_sec4_sg(struct device *jrdev,
+				      struct scatterlist *src, int src_nents,
+				      struct sec4_sg_entry *sec4_sg)
+{
+	dma_map_sg(jrdev, src, src_nents, DMA_TO_DEVICE);
+	sg_to_sec4_sg_last(src, src_nents, sec4_sg, 0);
+}
+
+/*
+ * Only put buffer in link table if it contains data, which is possible,
+ * since a buffer has previously been used, and needs to be unmapped,
+ */
+static inline dma_addr_t
+try_buf_map_to_sec4_sg(struct device *jrdev, struct sec4_sg_entry *sec4_sg,
+		       u8 *buf, dma_addr_t buf_dma, int buflen,
+		       int last_buflen)
+{
+	if (buf_dma && !dma_mapping_error(jrdev, buf_dma))
+		dma_unmap_single(jrdev, buf_dma, last_buflen, DMA_TO_DEVICE);
+	if (buflen)
+		buf_dma = buf_map_to_sec4_sg(jrdev, sec4_sg, buf, buflen);
+	else
+		buf_dma = 0;
+
+	return buf_dma;
+}
+
+/* Map state->caam_ctx, and add it to link table */
+static inline void ctx_map_to_sec4_sg(u32 *desc, struct device *jrdev,
+				      struct caam_hash_state *state,
+				      int ctx_len,
+				      struct sec4_sg_entry *sec4_sg,
+				      u32 flag)
+{
+	state->ctx_dma = dma_map_single(jrdev, state->caam_ctx, ctx_len, flag);
+	dma_to_sec4_sg_one(sec4_sg, state->ctx_dma, ctx_len, 0);
+}
+
+/* Common shared descriptor commands */
+static inline void append_key_ahash(u32 *desc, struct caam_hash_ctx *ctx)
+{
+	append_key_as_imm(desc, ctx->key, ctx->split_key_pad_len,
+			  ctx->split_key_len, CLASS_2 |
+			  KEY_DEST_MDHA_SPLIT | KEY_ENC);
+}
+
+/* Append key if it has been set */
+static inline void init_sh_desc_key_ahash(u32 *desc, struct caam_hash_ctx *ctx)
+{
+	u32 *key_jump_cmd;
+
+	init_sh_desc(desc, HDR_SHARE_WAIT);
+
+	if (ctx->split_key_len) {
+		/* Skip if already shared */
+		key_jump_cmd = append_jump(desc, JUMP_JSL | JUMP_TEST_ALL |
+					   JUMP_COND_SHRD);
+
+		append_key_ahash(desc, ctx);
+
+		set_jump_tgt_here(desc, key_jump_cmd);
+	}
+
+	/* Propagate errors from shared to job descriptor */
+	append_cmd(desc, SET_OK_NO_PROP_ERRORS | CMD_LOAD);
+}
+
+/*
+ * For ahash read data from seqin following state->caam_ctx,
+ * and write resulting class2 context to seqout, which may be state->caam_ctx
+ * or req->result
+ */
+static inline void ahash_append_load_str(u32 *desc, int digestsize)
+{
+	/* Calculate remaining bytes to read */
+	append_math_add(desc, VARSEQINLEN, SEQINLEN, REG0, CAAM_CMD_SZ);
+
+	/* Read remaining bytes */
+	append_seq_fifo_load(desc, 0, FIFOLD_CLASS_CLASS2 | FIFOLD_TYPE_LAST2 |
+			     FIFOLD_TYPE_MSG | KEY_VLF);
+
+	/* Store class2 context bytes */
+	append_seq_store(desc, digestsize, LDST_CLASS_2_CCB |
+			 LDST_SRCDST_BYTE_CONTEXT);
+}
+
+/*
+ * For ahash update, final and finup, import context, read and write to seqout
+ */
+static inline void ahash_ctx_data_to_out(u32 *desc, u32 op, u32 state,
+					 int digestsize,
+					 struct caam_hash_ctx *ctx)
+{
+	init_sh_desc_key_ahash(desc, ctx);
+
+	/* Import context from software */
+	append_cmd(desc, CMD_SEQ_LOAD | LDST_SRCDST_BYTE_CONTEXT |
+		   LDST_CLASS_2_CCB | ctx->ctx_len);
+
+	/* Class 2 operation */
+	append_operation(desc, op | state | OP_ALG_ENCRYPT);
+
+	/*
+	 * Load from buf and/or src and write to req->result or state->context
+	 */
+	ahash_append_load_str(desc, digestsize);
+}
+
+/* For ahash firsts and digest, read and write to seqout */
+static inline void ahash_data_to_out(u32 *desc, u32 op, u32 state,
+				     int digestsize, struct caam_hash_ctx *ctx)
+{
+	init_sh_desc_key_ahash(desc, ctx);
+
+	/* Class 2 operation */
+	append_operation(desc, op | state | OP_ALG_ENCRYPT);
+
+	/*
+	 * Load from buf and/or src and write to req->result or state->context
+	 */
+	ahash_append_load_str(desc, digestsize);
+}
+
+static int ahash_set_sh_desc(struct crypto_ahash *ahash)
+{
+	struct caam_hash_ctx *ctx = crypto_ahash_ctx(ahash);
+	int digestsize = crypto_ahash_digestsize(ahash);
+	struct device *jrdev = ctx->jrdev;
+	u32 have_key = 0;
+	u32 *desc;
+
+	if (ctx->split_key_len)
+		have_key = OP_ALG_AAI_HMAC_PRECOMP;
+
+	/* ahash_update shared descriptor */
+	desc = ctx->sh_desc_update;
+
+	init_sh_desc(desc, HDR_SHARE_WAIT);
+
+	/* Import context from software */
+	append_cmd(desc, CMD_SEQ_LOAD | LDST_SRCDST_BYTE_CONTEXT |
+		   LDST_CLASS_2_CCB | ctx->ctx_len);
+
+	/* Class 2 operation */
+	append_operation(desc, ctx->alg_type | OP_ALG_AS_UPDATE |
+			 OP_ALG_ENCRYPT);
+
+	/* Load data and write to result or context */
+	ahash_append_load_str(desc, ctx->ctx_len);
+
+	ctx->sh_desc_update_dma = dma_map_single(jrdev, desc, desc_bytes(desc),
+						 DMA_TO_DEVICE);
+	if (dma_mapping_error(jrdev, ctx->sh_desc_update_dma)) {
+		dev_err(jrdev, "unable to map shared descriptor\n");
+		return -ENOMEM;
+	}
+#ifdef DEBUG
+	print_hex_dump(KERN_ERR, "ahash update shdesc@"xstr(__LINE__)": ",
+		       DUMP_PREFIX_ADDRESS, 16, 4, desc, desc_bytes(desc), 1);
+#endif
+
+	/* ahash_update_first shared descriptor */
+	desc = ctx->sh_desc_update_first;
+
+	ahash_data_to_out(desc, have_key | ctx->alg_type, OP_ALG_AS_INIT,
+			  ctx->ctx_len, ctx);
+
+	ctx->sh_desc_update_first_dma = dma_map_single(jrdev, desc,
+						       desc_bytes(desc),
+						       DMA_TO_DEVICE);
+	if (dma_mapping_error(jrdev, ctx->sh_desc_update_first_dma)) {
+		dev_err(jrdev, "unable to map shared descriptor\n");
+		return -ENOMEM;
+	}
+#ifdef DEBUG
+	print_hex_dump(KERN_ERR, "ahash update first shdesc@"xstr(__LINE__)": ",
+		       DUMP_PREFIX_ADDRESS, 16, 4, desc, desc_bytes(desc), 1);
+#endif
+
+	/* ahash_final shared descriptor */
+	desc = ctx->sh_desc_fin;
+
+	ahash_ctx_data_to_out(desc, have_key | ctx->alg_type,
+			      OP_ALG_AS_FINALIZE, digestsize, ctx);
+
+	ctx->sh_desc_fin_dma = dma_map_single(jrdev, desc, desc_bytes(desc),
+					      DMA_TO_DEVICE);
+	if (dma_mapping_error(jrdev, ctx->sh_desc_fin_dma)) {
+		dev_err(jrdev, "unable to map shared descriptor\n");
+		return -ENOMEM;
+	}
+#ifdef DEBUG
+	print_hex_dump(KERN_ERR, "ahash final shdesc@"xstr(__LINE__)": ",
+		       DUMP_PREFIX_ADDRESS, 16, 4, desc,
+		       desc_bytes(desc), 1);
+#endif
+
+	/* ahash_finup shared descriptor */
+	desc = ctx->sh_desc_finup;
+
+	ahash_ctx_data_to_out(desc, have_key | ctx->alg_type,
+			      OP_ALG_AS_FINALIZE, digestsize, ctx);
+
+	ctx->sh_desc_finup_dma = dma_map_single(jrdev, desc, desc_bytes(desc),
+						DMA_TO_DEVICE);
+	if (dma_mapping_error(jrdev, ctx->sh_desc_finup_dma)) {
+		dev_err(jrdev, "unable to map shared descriptor\n");
+		return -ENOMEM;
+	}
+#ifdef DEBUG
+	print_hex_dump(KERN_ERR, "ahash finup shdesc@"xstr(__LINE__)": ",
+		       DUMP_PREFIX_ADDRESS, 16, 4, desc,
+		       desc_bytes(desc), 1);
+#endif
+
+	/* ahash_digest shared descriptor */
+	desc = ctx->sh_desc_digest;
+
+	ahash_data_to_out(desc, have_key | ctx->alg_type, OP_ALG_AS_INITFINAL,
+			  digestsize, ctx);
+
+	ctx->sh_desc_digest_dma = dma_map_single(jrdev, desc,
+						 desc_bytes(desc),
+						 DMA_TO_DEVICE);
+	if (dma_mapping_error(jrdev, ctx->sh_desc_digest_dma)) {
+		dev_err(jrdev, "unable to map shared descriptor\n");
+		return -ENOMEM;
+	}
+#ifdef DEBUG
+	print_hex_dump(KERN_ERR, "ahash digest shdesc@"xstr(__LINE__)": ",
+		       DUMP_PREFIX_ADDRESS, 16, 4, desc,
+		       desc_bytes(desc), 1);
+#endif
+
+	return 0;
+}
+
+static u32 gen_split_hash_key(struct caam_hash_ctx *ctx, const u8 *key_in,
+			      u32 keylen)
+{
+	return gen_split_key(ctx->jrdev, ctx->key, ctx->split_key_len,
+			       ctx->split_key_pad_len, key_in, keylen,
+			       ctx->alg_op);
+}
+
+/* Digest hash size if it is too large */
+static u32 hash_digest_key(struct caam_hash_ctx *ctx, const u8 *key_in,
+			   u32 *keylen, u8 *key_out, u32 digestsize)
+{
+	struct device *jrdev = ctx->jrdev;
+	u32 *desc;
+	struct split_key_result result;
+	dma_addr_t src_dma, dst_dma;
+	int ret = 0;
+
+	desc = kmalloc(CAAM_CMD_SZ * 6 + CAAM_PTR_SZ * 2, GFP_KERNEL | GFP_DMA);
+
+	init_job_desc(desc, 0);
+
+	src_dma = dma_map_single(jrdev, (void *)key_in, *keylen,
+				 DMA_TO_DEVICE);
+	if (dma_mapping_error(jrdev, src_dma)) {
+		dev_err(jrdev, "unable to map key input memory\n");
+		kfree(desc);
+		return -ENOMEM;
+	}
+	dst_dma = dma_map_single(jrdev, (void *)key_out, digestsize,
+				 DMA_FROM_DEVICE);
+	if (dma_mapping_error(jrdev, dst_dma)) {
+		dev_err(jrdev, "unable to map key output memory\n");
+		dma_unmap_single(jrdev, src_dma, *keylen, DMA_TO_DEVICE);
+		kfree(desc);
+		return -ENOMEM;
+	}
+
+	/* Job descriptor to perform unkeyed hash on key_in */
+	append_operation(desc, ctx->alg_type | OP_ALG_ENCRYPT |
+			 OP_ALG_AS_INITFINAL);
+	append_seq_in_ptr(desc, src_dma, *keylen, 0);
+	append_seq_fifo_load(desc, *keylen, FIFOLD_CLASS_CLASS2 |
+			     FIFOLD_TYPE_LAST2 | FIFOLD_TYPE_MSG);
+	append_seq_out_ptr(desc, dst_dma, digestsize, 0);
+	append_seq_store(desc, digestsize, LDST_CLASS_2_CCB |
+			 LDST_SRCDST_BYTE_CONTEXT);
+
+#ifdef DEBUG
+	print_hex_dump(KERN_ERR, "key_in@"xstr(__LINE__)": ",
+		       DUMP_PREFIX_ADDRESS, 16, 4, key_in, *keylen, 1);
+	print_hex_dump(KERN_ERR, "jobdesc@"xstr(__LINE__)": ",
+		       DUMP_PREFIX_ADDRESS, 16, 4, desc, desc_bytes(desc), 1);
+#endif
+
+	result.err = 0;
+	init_completion(&result.completion);
+
+	ret = caam_jr_enqueue(jrdev, desc, split_key_done, &result);
+	if (!ret) {
+		/* in progress */
+		wait_for_completion_interruptible(&result.completion);
+		ret = result.err;
+#ifdef DEBUG
+		print_hex_dump(KERN_ERR, "digested key@"xstr(__LINE__)": ",
+			       DUMP_PREFIX_ADDRESS, 16, 4, key_in,
+			       digestsize, 1);
+#endif
+	}
+	*keylen = digestsize;
+
+	dma_unmap_single(jrdev, src_dma, *keylen, DMA_TO_DEVICE);
+	dma_unmap_single(jrdev, dst_dma, digestsize, DMA_FROM_DEVICE);
+
+	kfree(desc);
+
+	return ret;
+}
+
+static int ahash_setkey(struct crypto_ahash *ahash,
+			const u8 *key, unsigned int keylen)
+{
+	/* Sizes for MDHA pads (*not* keys): MD5, SHA1, 224, 256, 384, 512 */
+	static const u8 mdpadlen[] = { 16, 20, 32, 32, 64, 64 };
+	struct caam_hash_ctx *ctx = crypto_ahash_ctx(ahash);
+	struct device *jrdev = ctx->jrdev;
+	int blocksize = crypto_tfm_alg_blocksize(&ahash->base);
+	int digestsize = crypto_ahash_digestsize(ahash);
+	int ret = 0;
+	u8 *hashed_key = NULL;
+
+#ifdef DEBUG
+	printk(KERN_ERR "keylen %d\n", keylen);
+#endif
+
+	if (keylen > blocksize) {
+		hashed_key = kmalloc(sizeof(u8) * digestsize, GFP_KERNEL |
+				     GFP_DMA);
+		if (!hashed_key)
+			return -ENOMEM;
+		ret = hash_digest_key(ctx, key, &keylen, hashed_key,
+				      digestsize);
+		if (ret)
+			goto badkey;
+		key = hashed_key;
+	}
+
+	/* Pick class 2 key length from algorithm submask */
+	ctx->split_key_len = mdpadlen[(ctx->alg_op & OP_ALG_ALGSEL_SUBMASK) >>
+				      OP_ALG_ALGSEL_SHIFT] * 2;
+	ctx->split_key_pad_len = ALIGN(ctx->split_key_len, 16);
+
+#ifdef DEBUG
+	printk(KERN_ERR "split_key_len %d split_key_pad_len %d\n",
+	       ctx->split_key_len, ctx->split_key_pad_len);
+	print_hex_dump(KERN_ERR, "key in @"xstr(__LINE__)": ",
+		       DUMP_PREFIX_ADDRESS, 16, 4, key, keylen, 1);
+#endif
+
+	ret = gen_split_hash_key(ctx, key, keylen);
+	if (ret)
+		goto badkey;
+
+	ctx->key_dma = dma_map_single(jrdev, ctx->key, ctx->split_key_pad_len,
+				      DMA_TO_DEVICE);
+	if (dma_mapping_error(jrdev, ctx->key_dma)) {
+		dev_err(jrdev, "unable to map key i/o memory\n");
+		return -ENOMEM;
+	}
+#ifdef DEBUG
+	print_hex_dump(KERN_ERR, "ctx.key@"xstr(__LINE__)": ",
+		       DUMP_PREFIX_ADDRESS, 16, 4, ctx->key,
+		       ctx->split_key_pad_len, 1);
+#endif
+
+	ret = ahash_set_sh_desc(ahash);
+	if (ret) {
+		dma_unmap_single(jrdev, ctx->key_dma, ctx->split_key_pad_len,
+				 DMA_TO_DEVICE);
+	}
+
+	kfree(hashed_key);
+	return ret;
+badkey:
+	kfree(hashed_key);
+	crypto_ahash_set_flags(ahash, CRYPTO_TFM_RES_BAD_KEY_LEN);
+	return -EINVAL;
+}
+
+/*
+ * ahash_edesc - s/w-extended ahash descriptor
+ * @dst_dma: physical mapped address of req->result
+ * @sec4_sg_dma: physical mapped address of h/w link table
+ * @src_nents: number of segments in input scatterlist
+ * @sec4_sg_bytes: length of dma mapped sec4_sg space
+ * @sec4_sg: pointer to h/w link table
+ * @hw_desc: the h/w job descriptor followed by any referenced link tables
+ */
+struct ahash_edesc {
+	dma_addr_t dst_dma;
+	dma_addr_t sec4_sg_dma;
+	int src_nents;
+	int sec4_sg_bytes;
+	struct sec4_sg_entry *sec4_sg;
+	u32 hw_desc[0];
+};
+
+static inline void ahash_unmap(struct device *dev,
+			struct ahash_edesc *edesc,
+			struct ahash_request *req, int dst_len)
+{
+	if (edesc->src_nents)
+		dma_unmap_sg(dev, req->src, edesc->src_nents, DMA_TO_DEVICE);
+	if (edesc->dst_dma)
+		dma_unmap_single(dev, edesc->dst_dma, dst_len, DMA_FROM_DEVICE);
+
+	if (edesc->sec4_sg_bytes)
+		dma_unmap_single(dev, edesc->sec4_sg_dma,
+				 edesc->sec4_sg_bytes, DMA_TO_DEVICE);
+}
+
+static inline void ahash_unmap_ctx(struct device *dev,
+			struct ahash_edesc *edesc,
+			struct ahash_request *req, int dst_len, u32 flag)
+{
+	struct crypto_ahash *ahash = crypto_ahash_reqtfm(req);
+	struct caam_hash_ctx *ctx = crypto_ahash_ctx(ahash);
+	struct caam_hash_state *state = ahash_request_ctx(req);
+
+	if (state->ctx_dma)
+		dma_unmap_single(dev, state->ctx_dma, ctx->ctx_len, flag);
+	ahash_unmap(dev, edesc, req, dst_len);
+}
+
+static void ahash_done(struct device *jrdev, u32 *desc, u32 err,
+		       void *context)
+{
+	struct ahash_request *req = context;
+	struct ahash_edesc *edesc;
+	struct crypto_ahash *ahash = crypto_ahash_reqtfm(req);
+	int digestsize = crypto_ahash_digestsize(ahash);
+#ifdef DEBUG
+	struct caam_hash_ctx *ctx = crypto_ahash_ctx(ahash);
+	struct caam_hash_state *state = ahash_request_ctx(req);
+
+	dev_err(jrdev, "%s %d: err 0x%x\n", __func__, __LINE__, err);
+#endif
+
+	edesc = (struct ahash_edesc *)((char *)desc -
+		 offsetof(struct ahash_edesc, hw_desc));
+	if (err) {
+		char tmp[CAAM_ERROR_STR_MAX];
+
+		dev_err(jrdev, "%08x: %s\n", err, caam_jr_strstatus(tmp, err));
+	}
+
+	ahash_unmap(jrdev, edesc, req, digestsize);
+	kfree(edesc);
+
+#ifdef DEBUG
+	print_hex_dump(KERN_ERR, "ctx@"xstr(__LINE__)": ",
+		       DUMP_PREFIX_ADDRESS, 16, 4, state->caam_ctx,
+		       ctx->ctx_len, 1);
+	if (req->result)
+		print_hex_dump(KERN_ERR, "result@"xstr(__LINE__)": ",
+			       DUMP_PREFIX_ADDRESS, 16, 4, req->result,
+			       digestsize, 1);
+#endif
+
+	req->base.complete(&req->base, err);
+}
+
+static void ahash_done_bi(struct device *jrdev, u32 *desc, u32 err,
+			    void *context)
+{
+	struct ahash_request *req = context;
+	struct ahash_edesc *edesc;
+	struct crypto_ahash *ahash = crypto_ahash_reqtfm(req);
+	struct caam_hash_ctx *ctx = crypto_ahash_ctx(ahash);
+#ifdef DEBUG
+	struct caam_hash_state *state = ahash_request_ctx(req);
+	int digestsize = crypto_ahash_digestsize(ahash);
+
+	dev_err(jrdev, "%s %d: err 0x%x\n", __func__, __LINE__, err);
+#endif
+
+	edesc = (struct ahash_edesc *)((char *)desc -
+		 offsetof(struct ahash_edesc, hw_desc));
+	if (err) {
+		char tmp[CAAM_ERROR_STR_MAX];
+
+		dev_err(jrdev, "%08x: %s\n", err, caam_jr_strstatus(tmp, err));
+	}
+
+	ahash_unmap_ctx(jrdev, edesc, req, ctx->ctx_len, DMA_BIDIRECTIONAL);
+	kfree(edesc);
+
+#ifdef DEBUG
+	print_hex_dump(KERN_ERR, "ctx@"xstr(__LINE__)": ",
+		       DUMP_PREFIX_ADDRESS, 16, 4, state->caam_ctx,
+		       ctx->ctx_len, 1);
+	if (req->result)
+		print_hex_dump(KERN_ERR, "result@"xstr(__LINE__)": ",
+			       DUMP_PREFIX_ADDRESS, 16, 4, req->result,
+			       digestsize, 1);
+#endif
+
+	req->base.complete(&req->base, err);
+}
+
+static void ahash_done_ctx_src(struct device *jrdev, u32 *desc, u32 err,
+			       void *context)
+{
+	struct ahash_request *req = context;
+	struct ahash_edesc *edesc;
+	struct crypto_ahash *ahash = crypto_ahash_reqtfm(req);
+	int digestsize = crypto_ahash_digestsize(ahash);
+#ifdef DEBUG
+	struct caam_hash_ctx *ctx = crypto_ahash_ctx(ahash);
+	struct caam_hash_state *state = ahash_request_ctx(req);
+
+	dev_err(jrdev, "%s %d: err 0x%x\n", __func__, __LINE__, err);
+#endif
+
+	edesc = (struct ahash_edesc *)((char *)desc -
+		 offsetof(struct ahash_edesc, hw_desc));
+	if (err) {
+		char tmp[CAAM_ERROR_STR_MAX];
+
+		dev_err(jrdev, "%08x: %s\n", err, caam_jr_strstatus(tmp, err));
+	}
+
+	ahash_unmap_ctx(jrdev, edesc, req, digestsize, DMA_FROM_DEVICE);
+	kfree(edesc);
+
+#ifdef DEBUG
+	print_hex_dump(KERN_ERR, "ctx@"xstr(__LINE__)": ",
+		       DUMP_PREFIX_ADDRESS, 16, 4, state->caam_ctx,
+		       ctx->ctx_len, 1);
+	if (req->result)
+		print_hex_dump(KERN_ERR, "result@"xstr(__LINE__)": ",
+			       DUMP_PREFIX_ADDRESS, 16, 4, req->result,
+			       digestsize, 1);
+#endif
+
+	req->base.complete(&req->base, err);
+}
+
+static void ahash_done_ctx_dst(struct device *jrdev, u32 *desc, u32 err,
+			       void *context)
+{
+	struct ahash_request *req = context;
+	struct ahash_edesc *edesc;
+	struct crypto_ahash *ahash = crypto_ahash_reqtfm(req);
+	struct caam_hash_ctx *ctx = crypto_ahash_ctx(ahash);
+#ifdef DEBUG
+	struct caam_hash_state *state = ahash_request_ctx(req);
+	int digestsize = crypto_ahash_digestsize(ahash);
+
+	dev_err(jrdev, "%s %d: err 0x%x\n", __func__, __LINE__, err);
+#endif
+
+	edesc = (struct ahash_edesc *)((char *)desc -
+		 offsetof(struct ahash_edesc, hw_desc));
+	if (err) {
+		char tmp[CAAM_ERROR_STR_MAX];
+
+		dev_err(jrdev, "%08x: %s\n", err, caam_jr_strstatus(tmp, err));
+	}
+
+	ahash_unmap_ctx(jrdev, edesc, req, ctx->ctx_len, DMA_TO_DEVICE);
+	kfree(edesc);
+
+#ifdef DEBUG
+	print_hex_dump(KERN_ERR, "ctx@"xstr(__LINE__)": ",
+		       DUMP_PREFIX_ADDRESS, 16, 4, state->caam_ctx,
+		       ctx->ctx_len, 1);
+	if (req->result)
+		print_hex_dump(KERN_ERR, "result@"xstr(__LINE__)": ",
+			       DUMP_PREFIX_ADDRESS, 16, 4, req->result,
+			       digestsize, 1);
+#endif
+
+	req->base.complete(&req->base, err);
+}
+
+/* submit update job descriptor */
+static int ahash_update_ctx(struct ahash_request *req)
+{
+	struct crypto_ahash *ahash = crypto_ahash_reqtfm(req);
+	struct caam_hash_ctx *ctx = crypto_ahash_ctx(ahash);
+	struct caam_hash_state *state = ahash_request_ctx(req);
+	struct device *jrdev = ctx->jrdev;
+	gfp_t flags = (req->base.flags & (CRYPTO_TFM_REQ_MAY_BACKLOG |
+		       CRYPTO_TFM_REQ_MAY_SLEEP)) ? GFP_KERNEL : GFP_ATOMIC;
+	u8 *buf = state->current_buf ? state->buf_1 : state->buf_0;
+	int *buflen = state->current_buf ? &state->buflen_1 : &state->buflen_0;
+	u8 *next_buf = state->current_buf ? state->buf_0 : state->buf_1;
+	int *next_buflen = state->current_buf ? &state->buflen_0 :
+			   &state->buflen_1, last_buflen;
+	int in_len = *buflen + req->nbytes, to_hash;
+	u32 *sh_desc = ctx->sh_desc_update, *desc;
+	dma_addr_t ptr = ctx->sh_desc_update_dma;
+	int src_nents, sec4_sg_bytes, sec4_sg_src_index;
+	struct ahash_edesc *edesc;
+	int ret = 0;
+	int sh_len;
+
+	last_buflen = *next_buflen;
+	*next_buflen = in_len & (crypto_tfm_alg_blocksize(&ahash->base) - 1);
+	to_hash = in_len - *next_buflen;
+
+	if (to_hash) {
+		src_nents = __sg_count(req->src, req->nbytes - (*next_buflen));
+		sec4_sg_src_index = 1 + (*buflen ? 1 : 0);
+		sec4_sg_bytes = (sec4_sg_src_index + src_nents) *
+				 sizeof(struct sec4_sg_entry);
+
+		/*
+		 * allocate space for base edesc and hw desc commands,
+		 * link tables
+		 */
+		edesc = kmalloc(sizeof(struct ahash_edesc) + DESC_JOB_IO_LEN +
+				sec4_sg_bytes, GFP_DMA | flags);
+		if (!edesc) {
+			dev_err(jrdev,
+				"could not allocate extended descriptor\n");
+			return -ENOMEM;
+		}
+
+		edesc->src_nents = src_nents;
+		edesc->sec4_sg_bytes = sec4_sg_bytes;
+		edesc->sec4_sg = (void *)edesc + sizeof(struct ahash_edesc) +
+				 DESC_JOB_IO_LEN;
+		edesc->sec4_sg_dma = dma_map_single(jrdev, edesc->sec4_sg,
+						     sec4_sg_bytes,
+						     DMA_TO_DEVICE);
+
+		ctx_map_to_sec4_sg(desc, jrdev, state, ctx->ctx_len,
+				   edesc->sec4_sg, DMA_BIDIRECTIONAL);
+
+		state->buf_dma = try_buf_map_to_sec4_sg(jrdev,
+							edesc->sec4_sg + 1,
+							buf, state->buf_dma,
+							*buflen, last_buflen);
+
+		if (src_nents) {
+			src_map_to_sec4_sg(jrdev, req->src, src_nents,
+					   edesc->sec4_sg + sec4_sg_src_index);
+			if (*next_buflen) {
+				sg_copy_part(next_buf, req->src, to_hash -
+					     *buflen, req->nbytes);
+				state->current_buf = !state->current_buf;
+			}
+		} else {
+			(edesc->sec4_sg + sec4_sg_src_index - 1)->len |=
+							SEC4_SG_LEN_FIN;
+		}
+
+		sh_len = desc_len(sh_desc);
+		desc = edesc->hw_desc;
+		init_job_desc_shared(desc, ptr, sh_len, HDR_SHARE_DEFER |
+				     HDR_REVERSE);
+
+		append_seq_in_ptr(desc, edesc->sec4_sg_dma, ctx->ctx_len +
+				       to_hash, LDST_SGF);
+
+		append_seq_out_ptr(desc, state->ctx_dma, ctx->ctx_len, 0);
+
+#ifdef DEBUG
+		print_hex_dump(KERN_ERR, "jobdesc@"xstr(__LINE__)": ",
+			       DUMP_PREFIX_ADDRESS, 16, 4, desc,
+			       desc_bytes(desc), 1);
+#endif
+
+		ret = caam_jr_enqueue(jrdev, desc, ahash_done_bi, req);
+		if (!ret) {
+			ret = -EINPROGRESS;
+		} else {
+			ahash_unmap_ctx(jrdev, edesc, req, ctx->ctx_len,
+					   DMA_BIDIRECTIONAL);
+			kfree(edesc);
+		}
+	} else if (*next_buflen) {
+		sg_copy(buf + *buflen, req->src, req->nbytes);
+		*buflen = *next_buflen;
+		*next_buflen = last_buflen;
+	}
+#ifdef DEBUG
+	print_hex_dump(KERN_ERR, "buf@"xstr(__LINE__)": ",
+		       DUMP_PREFIX_ADDRESS, 16, 4, buf, *buflen, 1);
+	print_hex_dump(KERN_ERR, "next buf@"xstr(__LINE__)": ",
+		       DUMP_PREFIX_ADDRESS, 16, 4, next_buf,
+		       *next_buflen, 1);
+#endif
+
+	return ret;
+}
+
+static int ahash_final_ctx(struct ahash_request *req)
+{
+	struct crypto_ahash *ahash = crypto_ahash_reqtfm(req);
+	struct caam_hash_ctx *ctx = crypto_ahash_ctx(ahash);
+	struct caam_hash_state *state = ahash_request_ctx(req);
+	struct device *jrdev = ctx->jrdev;
+	gfp_t flags = (req->base.flags & (CRYPTO_TFM_REQ_MAY_BACKLOG |
+		       CRYPTO_TFM_REQ_MAY_SLEEP)) ? GFP_KERNEL : GFP_ATOMIC;
+	u8 *buf = state->current_buf ? state->buf_1 : state->buf_0;
+	int buflen = state->current_buf ? state->buflen_1 : state->buflen_0;
+	int last_buflen = state->current_buf ? state->buflen_0 :
+			  state->buflen_1;
+	u32 *sh_desc = ctx->sh_desc_fin, *desc;
+	dma_addr_t ptr = ctx->sh_desc_fin_dma;
+	int sec4_sg_bytes;
+	int digestsize = crypto_ahash_digestsize(ahash);
+	struct ahash_edesc *edesc;
+	int ret = 0;
+	int sh_len;
+
+	sec4_sg_bytes = (1 + (buflen ? 1 : 0)) * sizeof(struct sec4_sg_entry);
+
+	/* allocate space for base edesc and hw desc commands, link tables */
+	edesc = kmalloc(sizeof(struct ahash_edesc) + DESC_JOB_IO_LEN +
+			sec4_sg_bytes, GFP_DMA | flags);
+	if (!edesc) {
+		dev_err(jrdev, "could not allocate extended descriptor\n");
+		return -ENOMEM;
+	}
+
+	sh_len = desc_len(sh_desc);
+	desc = edesc->hw_desc;
+	init_job_desc_shared(desc, ptr, sh_len, HDR_SHARE_DEFER | HDR_REVERSE);
+
+	edesc->sec4_sg_bytes = sec4_sg_bytes;
+	edesc->sec4_sg = (void *)edesc + sizeof(struct ahash_edesc) +
+			 DESC_JOB_IO_LEN;
+	edesc->sec4_sg_dma = dma_map_single(jrdev, edesc->sec4_sg,
+					    sec4_sg_bytes, DMA_TO_DEVICE);
+	edesc->src_nents = 0;
+
+	ctx_map_to_sec4_sg(desc, jrdev, state, ctx->ctx_len, edesc->sec4_sg,
+			   DMA_TO_DEVICE);
+
+	state->buf_dma = try_buf_map_to_sec4_sg(jrdev, edesc->sec4_sg + 1,
+						buf, state->buf_dma, buflen,
+						last_buflen);
+	(edesc->sec4_sg + sec4_sg_bytes - 1)->len |= SEC4_SG_LEN_FIN;
+
+	append_seq_in_ptr(desc, edesc->sec4_sg_dma, ctx->ctx_len + buflen,
+			  LDST_SGF);
+
+	edesc->dst_dma = map_seq_out_ptr_result(desc, jrdev, req->result,
+						digestsize);
+
+#ifdef DEBUG
+	print_hex_dump(KERN_ERR, "jobdesc@"xstr(__LINE__)": ",
+		       DUMP_PREFIX_ADDRESS, 16, 4, desc, desc_bytes(desc), 1);
+#endif
+
+	ret = caam_jr_enqueue(jrdev, desc, ahash_done_ctx_src, req);
+	if (!ret) {
+		ret = -EINPROGRESS;
+	} else {
+		ahash_unmap_ctx(jrdev, edesc, req, digestsize, DMA_FROM_DEVICE);
+		kfree(edesc);
+	}
+
+	return ret;
+}
+
+static int ahash_finup_ctx(struct ahash_request *req)
+{
+	struct crypto_ahash *ahash = crypto_ahash_reqtfm(req);
+	struct caam_hash_ctx *ctx = crypto_ahash_ctx(ahash);
+	struct caam_hash_state *state = ahash_request_ctx(req);
+	struct device *jrdev = ctx->jrdev;
+	gfp_t flags = (req->base.flags & (CRYPTO_TFM_REQ_MAY_BACKLOG |
+		       CRYPTO_TFM_REQ_MAY_SLEEP)) ? GFP_KERNEL : GFP_ATOMIC;
+	u8 *buf = state->current_buf ? state->buf_1 : state->buf_0;
+	int buflen = state->current_buf ? state->buflen_1 : state->buflen_0;
+	int last_buflen = state->current_buf ? state->buflen_0 :
+			  state->buflen_1;
+	u32 *sh_desc = ctx->sh_desc_finup, *desc;
+	dma_addr_t ptr = ctx->sh_desc_finup_dma;
+	int sec4_sg_bytes, sec4_sg_src_index;
+	int src_nents;
+	int digestsize = crypto_ahash_digestsize(ahash);
+	struct ahash_edesc *edesc;
+	int ret = 0;
+	int sh_len;
+
+	src_nents = __sg_count(req->src, req->nbytes);
+	sec4_sg_src_index = 1 + (buflen ? 1 : 0);
+	sec4_sg_bytes = (sec4_sg_src_index + src_nents) *
+			 sizeof(struct sec4_sg_entry);
+
+	/* allocate space for base edesc and hw desc commands, link tables */
+	edesc = kmalloc(sizeof(struct ahash_edesc) + DESC_JOB_IO_LEN +
+			sec4_sg_bytes, GFP_DMA | flags);
+	if (!edesc) {
+		dev_err(jrdev, "could not allocate extended descriptor\n");
+		return -ENOMEM;
+	}
+
+	sh_len = desc_len(sh_desc);
+	desc = edesc->hw_desc;
+	init_job_desc_shared(desc, ptr, sh_len, HDR_SHARE_DEFER | HDR_REVERSE);
+
+	edesc->src_nents = src_nents;
+	edesc->sec4_sg_bytes = sec4_sg_bytes;
+	edesc->sec4_sg = (void *)edesc + sizeof(struct ahash_edesc) +
+			 DESC_JOB_IO_LEN;
+	edesc->sec4_sg_dma = dma_map_single(jrdev, edesc->sec4_sg,
+					    sec4_sg_bytes, DMA_TO_DEVICE);
+
+	ctx_map_to_sec4_sg(desc, jrdev, state, ctx->ctx_len, edesc->sec4_sg,
+			   DMA_TO_DEVICE);
+
+	state->buf_dma = try_buf_map_to_sec4_sg(jrdev, edesc->sec4_sg + 1,
+						buf, state->buf_dma, buflen,
+						last_buflen);
+
+	src_map_to_sec4_sg(jrdev, req->src, src_nents, edesc->sec4_sg +
+			   sec4_sg_src_index);
+
+	append_seq_in_ptr(desc, edesc->sec4_sg_dma, ctx->ctx_len +
+			       buflen + req->nbytes, LDST_SGF);
+
+	edesc->dst_dma = map_seq_out_ptr_result(desc, jrdev, req->result,
+						digestsize);
+
+#ifdef DEBUG
+	print_hex_dump(KERN_ERR, "jobdesc@"xstr(__LINE__)": ",
+		       DUMP_PREFIX_ADDRESS, 16, 4, desc, desc_bytes(desc), 1);
+#endif
+
+	ret = caam_jr_enqueue(jrdev, desc, ahash_done_ctx_src, req);
+	if (!ret) {
+		ret = -EINPROGRESS;
+	} else {
+		ahash_unmap_ctx(jrdev, edesc, req, digestsize, DMA_FROM_DEVICE);
+		kfree(edesc);
+	}
+
+	return ret;
+}
+
+static int ahash_digest(struct ahash_request *req)
+{
+	struct crypto_ahash *ahash = crypto_ahash_reqtfm(req);
+	struct caam_hash_ctx *ctx = crypto_ahash_ctx(ahash);
+	struct device *jrdev = ctx->jrdev;
+	gfp_t flags = (req->base.flags & (CRYPTO_TFM_REQ_MAY_BACKLOG |
+		       CRYPTO_TFM_REQ_MAY_SLEEP)) ? GFP_KERNEL : GFP_ATOMIC;
+	u32 *sh_desc = ctx->sh_desc_digest, *desc;
+	dma_addr_t ptr = ctx->sh_desc_digest_dma;
+	int digestsize = crypto_ahash_digestsize(ahash);
+	int src_nents, sec4_sg_bytes;
+	dma_addr_t src_dma;
+	struct ahash_edesc *edesc;
+	int ret = 0;
+	u32 options;
+	int sh_len;
+
+	src_nents = sg_count(req->src, req->nbytes);
+	dma_map_sg(jrdev, req->src, src_nents ? : 1, DMA_TO_DEVICE);
+	sec4_sg_bytes = src_nents * sizeof(struct sec4_sg_entry);
+
+	/* allocate space for base edesc and hw desc commands, link tables */
+	edesc = kmalloc(sizeof(struct ahash_edesc) + sec4_sg_bytes +
+			DESC_JOB_IO_LEN, GFP_DMA | flags);
+	if (!edesc) {
+		dev_err(jrdev, "could not allocate extended descriptor\n");
+		return -ENOMEM;
+	}
+	edesc->sec4_sg = (void *)edesc + sizeof(struct ahash_edesc) +
+			  DESC_JOB_IO_LEN;
+	edesc->sec4_sg_dma = dma_map_single(jrdev, edesc->sec4_sg,
+					    sec4_sg_bytes, DMA_TO_DEVICE);
+	edesc->src_nents = src_nents;
+
+	sh_len = desc_len(sh_desc);
+	desc = edesc->hw_desc;
+	init_job_desc_shared(desc, ptr, sh_len, HDR_SHARE_DEFER | HDR_REVERSE);
+
+	if (src_nents) {
+		sg_to_sec4_sg_last(req->src, src_nents, edesc->sec4_sg, 0);
+		src_dma = edesc->sec4_sg_dma;
+		options = LDST_SGF;
+	} else {
+		src_dma = sg_dma_address(req->src);
+		options = 0;
+	}
+	append_seq_in_ptr(desc, src_dma, req->nbytes, options);
+
+	edesc->dst_dma = map_seq_out_ptr_result(desc, jrdev, req->result,
+						digestsize);
+
+#ifdef DEBUG
+	print_hex_dump(KERN_ERR, "jobdesc@"xstr(__LINE__)": ",
+		       DUMP_PREFIX_ADDRESS, 16, 4, desc, desc_bytes(desc), 1);
+#endif
+
+	ret = caam_jr_enqueue(jrdev, desc, ahash_done, req);
+	if (!ret) {
+		ret = -EINPROGRESS;
+	} else {
+		ahash_unmap(jrdev, edesc, req, digestsize);
+		kfree(edesc);
+	}
+
+	return ret;
+}
+
+/* submit ahash final if it the first job descriptor */
+static int ahash_final_no_ctx(struct ahash_request *req)
+{
+	struct crypto_ahash *ahash = crypto_ahash_reqtfm(req);
+	struct caam_hash_ctx *ctx = crypto_ahash_ctx(ahash);
+	struct caam_hash_state *state = ahash_request_ctx(req);
+	struct device *jrdev = ctx->jrdev;
+	gfp_t flags = (req->base.flags & (CRYPTO_TFM_REQ_MAY_BACKLOG |
+		       CRYPTO_TFM_REQ_MAY_SLEEP)) ? GFP_KERNEL : GFP_ATOMIC;
+	u8 *buf = state->current_buf ? state->buf_1 : state->buf_0;
+	int buflen = state->current_buf ? state->buflen_1 : state->buflen_0;
+	u32 *sh_desc = ctx->sh_desc_digest, *desc;
+	dma_addr_t ptr = ctx->sh_desc_digest_dma;
+	int digestsize = crypto_ahash_digestsize(ahash);
+	struct ahash_edesc *edesc;
+	int ret = 0;
+	int sh_len;
+
+	/* allocate space for base edesc and hw desc commands, link tables */
+	edesc = kmalloc(sizeof(struct ahash_edesc) + DESC_JOB_IO_LEN,
+			GFP_DMA | flags);
+	if (!edesc) {
+		dev_err(jrdev, "could not allocate extended descriptor\n");
+		return -ENOMEM;
+	}
+
+	sh_len = desc_len(sh_desc);
+	desc = edesc->hw_desc;
+	init_job_desc_shared(desc, ptr, sh_len, HDR_SHARE_DEFER | HDR_REVERSE);
+
+	state->buf_dma = dma_map_single(jrdev, buf, buflen, DMA_TO_DEVICE);
+
+	append_seq_in_ptr(desc, state->buf_dma, buflen, 0);
+
+	edesc->dst_dma = map_seq_out_ptr_result(desc, jrdev, req->result,
+						digestsize);
+	edesc->src_nents = 0;
+
+#ifdef DEBUG
+	print_hex_dump(KERN_ERR, "jobdesc@"xstr(__LINE__)": ",
+		       DUMP_PREFIX_ADDRESS, 16, 4, desc, desc_bytes(desc), 1);
+#endif
+
+	ret = caam_jr_enqueue(jrdev, desc, ahash_done, req);
+	if (!ret) {
+		ret = -EINPROGRESS;
+	} else {
+		ahash_unmap(jrdev, edesc, req, digestsize);
+		kfree(edesc);
+	}
+
+	return ret;
+}
+
+/* submit ahash update if it the first job descriptor after update */
+static int ahash_update_no_ctx(struct ahash_request *req)
+{
+	struct crypto_ahash *ahash = crypto_ahash_reqtfm(req);
+	struct caam_hash_ctx *ctx = crypto_ahash_ctx(ahash);
+	struct caam_hash_state *state = ahash_request_ctx(req);
+	struct device *jrdev = ctx->jrdev;
+	gfp_t flags = (req->base.flags & (CRYPTO_TFM_REQ_MAY_BACKLOG |
+		       CRYPTO_TFM_REQ_MAY_SLEEP)) ? GFP_KERNEL : GFP_ATOMIC;
+	u8 *buf = state->current_buf ? state->buf_1 : state->buf_0;
+	int *buflen = state->current_buf ? &state->buflen_1 : &state->buflen_0;
+	u8 *next_buf = state->current_buf ? state->buf_0 : state->buf_1;
+	int *next_buflen = state->current_buf ? &state->buflen_0 :
+			   &state->buflen_1;
+	int in_len = *buflen + req->nbytes, to_hash;
+	int sec4_sg_bytes, src_nents;
+	struct ahash_edesc *edesc;
+	u32 *desc, *sh_desc = ctx->sh_desc_update_first;
+	dma_addr_t ptr = ctx->sh_desc_update_first_dma;
+	int ret = 0;
+	int sh_len;
+
+	*next_buflen = in_len & (crypto_tfm_alg_blocksize(&ahash->base) - 1);
+	to_hash = in_len - *next_buflen;
+
+	if (to_hash) {
+		src_nents = __sg_count(req->src, req->nbytes - (*next_buflen));
+		sec4_sg_bytes = (1 + src_nents) *
+				sizeof(struct sec4_sg_entry);
+
+		/*
+		 * allocate space for base edesc and hw desc commands,
+		 * link tables
+		 */
+		edesc = kmalloc(sizeof(struct ahash_edesc) + DESC_JOB_IO_LEN +
+				sec4_sg_bytes, GFP_DMA | flags);
+		if (!edesc) {
+			dev_err(jrdev,
+				"could not allocate extended descriptor\n");
+			return -ENOMEM;
+		}
+
+		edesc->src_nents = src_nents;
+		edesc->sec4_sg_bytes = sec4_sg_bytes;
+		edesc->sec4_sg = (void *)edesc + sizeof(struct ahash_edesc) +
+				 DESC_JOB_IO_LEN;
+		edesc->sec4_sg_dma = dma_map_single(jrdev, edesc->sec4_sg,
+						    sec4_sg_bytes,
+						    DMA_TO_DEVICE);
+
+		state->buf_dma = buf_map_to_sec4_sg(jrdev, edesc->sec4_sg,
+						    buf, *buflen);
+		src_map_to_sec4_sg(jrdev, req->src, src_nents,
+				   edesc->sec4_sg + 1);
+		if (*next_buflen) {
+			sg_copy_part(next_buf, req->src, to_hash - *buflen,
+				    req->nbytes);
+			state->current_buf = !state->current_buf;
+		}
+
+		sh_len = desc_len(sh_desc);
+		desc = edesc->hw_desc;
+		init_job_desc_shared(desc, ptr, sh_len, HDR_SHARE_DEFER |
+				     HDR_REVERSE);
+
+		append_seq_in_ptr(desc, edesc->sec4_sg_dma, to_hash, LDST_SGF);
+
+		map_seq_out_ptr_ctx(desc, jrdev, state, ctx->ctx_len);
+
+#ifdef DEBUG
+		print_hex_dump(KERN_ERR, "jobdesc@"xstr(__LINE__)": ",
+			       DUMP_PREFIX_ADDRESS, 16, 4, desc,
+			       desc_bytes(desc), 1);
+#endif
+
+		ret = caam_jr_enqueue(jrdev, desc, ahash_done_ctx_dst, req);
+		if (!ret) {
+			ret = -EINPROGRESS;
+			state->update = ahash_update_ctx;
+			state->finup = ahash_finup_ctx;
+			state->final = ahash_final_ctx;
+		} else {
+			ahash_unmap_ctx(jrdev, edesc, req, ctx->ctx_len,
+					DMA_TO_DEVICE);
+			kfree(edesc);
+		}
+	} else if (*next_buflen) {
+		sg_copy(buf + *buflen, req->src, req->nbytes);
+		*buflen = *next_buflen;
+		*next_buflen = 0;
+	}
+#ifdef DEBUG
+	print_hex_dump(KERN_ERR, "buf@"xstr(__LINE__)": ",
+		       DUMP_PREFIX_ADDRESS, 16, 4, buf, *buflen, 1);
+	print_hex_dump(KERN_ERR, "next buf@"xstr(__LINE__)": ",
+		       DUMP_PREFIX_ADDRESS, 16, 4, next_buf,
+		       *next_buflen, 1);
+#endif
+
+	return ret;
+}
+
+/* submit ahash finup if it the first job descriptor after update */
+static int ahash_finup_no_ctx(struct ahash_request *req)
+{
+	struct crypto_ahash *ahash = crypto_ahash_reqtfm(req);
+	struct caam_hash_ctx *ctx = crypto_ahash_ctx(ahash);
+	struct caam_hash_state *state = ahash_request_ctx(req);
+	struct device *jrdev = ctx->jrdev;
+	gfp_t flags = (req->base.flags & (CRYPTO_TFM_REQ_MAY_BACKLOG |
+		       CRYPTO_TFM_REQ_MAY_SLEEP)) ? GFP_KERNEL : GFP_ATOMIC;
+	u8 *buf = state->current_buf ? state->buf_1 : state->buf_0;
+	int buflen = state->current_buf ? state->buflen_1 : state->buflen_0;
+	int last_buflen = state->current_buf ? state->buflen_0 :
+			  state->buflen_1;
+	u32 *sh_desc = ctx->sh_desc_digest, *desc;
+	dma_addr_t ptr = ctx->sh_desc_digest_dma;
+	int sec4_sg_bytes, sec4_sg_src_index, src_nents;
+	int digestsize = crypto_ahash_digestsize(ahash);
+	struct ahash_edesc *edesc;
+	int sh_len;
+	int ret = 0;
+
+	src_nents = __sg_count(req->src, req->nbytes);
+	sec4_sg_src_index = 2;
+	sec4_sg_bytes = (sec4_sg_src_index + src_nents) *
+			 sizeof(struct sec4_sg_entry);
+
+	/* allocate space for base edesc and hw desc commands, link tables */
+	edesc = kmalloc(sizeof(struct ahash_edesc) + DESC_JOB_IO_LEN +
+			sec4_sg_bytes, GFP_DMA | flags);
+	if (!edesc) {
+		dev_err(jrdev, "could not allocate extended descriptor\n");
+		return -ENOMEM;
+	}
+
+	sh_len = desc_len(sh_desc);
+	desc = edesc->hw_desc;
+	init_job_desc_shared(desc, ptr, sh_len, HDR_SHARE_DEFER | HDR_REVERSE);
+
+	edesc->src_nents = src_nents;
+	edesc->sec4_sg_bytes = sec4_sg_bytes;
+	edesc->sec4_sg = (void *)edesc + sizeof(struct ahash_edesc) +
+			 DESC_JOB_IO_LEN;
+	edesc->sec4_sg_dma = dma_map_single(jrdev, edesc->sec4_sg,
+					    sec4_sg_bytes, DMA_TO_DEVICE);
+
+	state->buf_dma = try_buf_map_to_sec4_sg(jrdev, edesc->sec4_sg, buf,
+						state->buf_dma, buflen,
+						last_buflen);
+
+	src_map_to_sec4_sg(jrdev, req->src, src_nents, edesc->sec4_sg + 1);
+
+	append_seq_in_ptr(desc, edesc->sec4_sg_dma, buflen +
+			       req->nbytes, LDST_SGF);
+
+	edesc->dst_dma = map_seq_out_ptr_result(desc, jrdev, req->result,
+						digestsize);
+
+#ifdef DEBUG
+	print_hex_dump(KERN_ERR, "jobdesc@"xstr(__LINE__)": ",
+		       DUMP_PREFIX_ADDRESS, 16, 4, desc, desc_bytes(desc), 1);
+#endif
+
+	ret = caam_jr_enqueue(jrdev, desc, ahash_done, req);
+	if (!ret) {
+		ret = -EINPROGRESS;
+	} else {
+		ahash_unmap(jrdev, edesc, req, digestsize);
+		kfree(edesc);
+	}
+
+	return ret;
+}
+
+/* submit first update job descriptor after init */
+static int ahash_update_first(struct ahash_request *req)
+{
+	struct crypto_ahash *ahash = crypto_ahash_reqtfm(req);
+	struct caam_hash_ctx *ctx = crypto_ahash_ctx(ahash);
+	struct caam_hash_state *state = ahash_request_ctx(req);
+	struct device *jrdev = ctx->jrdev;
+	gfp_t flags = (req->base.flags & (CRYPTO_TFM_REQ_MAY_BACKLOG |
+		       CRYPTO_TFM_REQ_MAY_SLEEP)) ? GFP_KERNEL : GFP_ATOMIC;
+	u8 *next_buf = state->buf_0 + state->current_buf *
+		       CAAM_MAX_HASH_BLOCK_SIZE;
+	int *next_buflen = &state->buflen_0 + state->current_buf;
+	int to_hash;
+	u32 *sh_desc = ctx->sh_desc_update_first, *desc;
+	dma_addr_t ptr = ctx->sh_desc_update_first_dma;
+	int sec4_sg_bytes, src_nents;
+	dma_addr_t src_dma;
+	u32 options;
+	struct ahash_edesc *edesc;
+	int ret = 0;
+	int sh_len;
+
+	*next_buflen = req->nbytes & (crypto_tfm_alg_blocksize(&ahash->base) -
+				      1);
+	to_hash = req->nbytes - *next_buflen;
+
+	if (to_hash) {
+		src_nents = sg_count(req->src, req->nbytes - (*next_buflen));
+		dma_map_sg(jrdev, req->src, src_nents ? : 1, DMA_TO_DEVICE);
+		sec4_sg_bytes = src_nents * sizeof(struct sec4_sg_entry);
+
+		/*
+		 * allocate space for base edesc and hw desc commands,
+		 * link tables
+		 */
+		edesc = kmalloc(sizeof(struct ahash_edesc) + DESC_JOB_IO_LEN +
+				sec4_sg_bytes, GFP_DMA | flags);
+		if (!edesc) {
+			dev_err(jrdev,
+				"could not allocate extended descriptor\n");
+			return -ENOMEM;
+		}
+
+		edesc->src_nents = src_nents;
+		edesc->sec4_sg_bytes = sec4_sg_bytes;
+		edesc->sec4_sg = (void *)edesc + sizeof(struct ahash_edesc) +
+				 DESC_JOB_IO_LEN;
+		edesc->sec4_sg_dma = dma_map_single(jrdev, edesc->sec4_sg,
+						    sec4_sg_bytes,
+						    DMA_TO_DEVICE);
+
+		if (src_nents) {
+			sg_to_sec4_sg_last(req->src, src_nents,
+					   edesc->sec4_sg, 0);
+			src_dma = edesc->sec4_sg_dma;
+			options = LDST_SGF;
+		} else {
+			src_dma = sg_dma_address(req->src);
+			options = 0;
+		}
+
+		if (*next_buflen)
+			sg_copy_part(next_buf, req->src, to_hash, req->nbytes);
+
+		sh_len = desc_len(sh_desc);
+		desc = edesc->hw_desc;
+		init_job_desc_shared(desc, ptr, sh_len, HDR_SHARE_DEFER |
+				     HDR_REVERSE);
+
+		append_seq_in_ptr(desc, src_dma, to_hash, options);
+
+		map_seq_out_ptr_ctx(desc, jrdev, state, ctx->ctx_len);
+
+#ifdef DEBUG
+		print_hex_dump(KERN_ERR, "jobdesc@"xstr(__LINE__)": ",
+			       DUMP_PREFIX_ADDRESS, 16, 4, desc,
+			       desc_bytes(desc), 1);
+#endif
+
+		ret = caam_jr_enqueue(jrdev, desc, ahash_done_ctx_dst,
+				      req);
+		if (!ret) {
+			ret = -EINPROGRESS;
+			state->update = ahash_update_ctx;
+			state->finup = ahash_finup_ctx;
+			state->final = ahash_final_ctx;
+		} else {
+			ahash_unmap_ctx(jrdev, edesc, req, ctx->ctx_len,
+					DMA_TO_DEVICE);
+			kfree(edesc);
+		}
+	} else if (*next_buflen) {
+		state->update = ahash_update_no_ctx;
+		state->finup = ahash_finup_no_ctx;
+		state->final = ahash_final_no_ctx;
+		sg_copy(next_buf, req->src, req->nbytes);
+	}
+#ifdef DEBUG
+	print_hex_dump(KERN_ERR, "next buf@"xstr(__LINE__)": ",
+		       DUMP_PREFIX_ADDRESS, 16, 4, next_buf,
+		       *next_buflen, 1);
+#endif
+
+	return ret;
+}
+
+static int ahash_finup_first(struct ahash_request *req)
+{
+	return ahash_digest(req);
+}
+
+static int ahash_init(struct ahash_request *req)
+{
+	struct caam_hash_state *state = ahash_request_ctx(req);
+
+	state->update = ahash_update_first;
+	state->finup = ahash_finup_first;
+	state->final = ahash_final_no_ctx;
+
+	state->current_buf = 0;
+
+	return 0;
+}
+
+static int ahash_update(struct ahash_request *req)
+{
+	struct caam_hash_state *state = ahash_request_ctx(req);
+
+	return state->update(req);
+}
+
+static int ahash_finup(struct ahash_request *req)
+{
+	struct caam_hash_state *state = ahash_request_ctx(req);
+
+	return state->finup(req);
+}
+
+static int ahash_final(struct ahash_request *req)
+{
+	struct caam_hash_state *state = ahash_request_ctx(req);
+
+	return state->final(req);
+}
+
+static int ahash_export(struct ahash_request *req, void *out)
+{
+	struct crypto_ahash *ahash = crypto_ahash_reqtfm(req);
+	struct caam_hash_ctx *ctx = crypto_ahash_ctx(ahash);
+	struct caam_hash_state *state = ahash_request_ctx(req);
+
+	memcpy(out, ctx, sizeof(struct caam_hash_ctx));
+	memcpy(out + sizeof(struct caam_hash_ctx), state,
+	       sizeof(struct caam_hash_state));
+	return 0;
+}
+
+static int ahash_import(struct ahash_request *req, const void *in)
+{
+	struct crypto_ahash *ahash = crypto_ahash_reqtfm(req);
+	struct caam_hash_ctx *ctx = crypto_ahash_ctx(ahash);
+	struct caam_hash_state *state = ahash_request_ctx(req);
+
+	memcpy(ctx, in, sizeof(struct caam_hash_ctx));
+	memcpy(state, in + sizeof(struct caam_hash_ctx),
+	       sizeof(struct caam_hash_state));
+	return 0;
+}
+
+struct caam_hash_template {
+	char name[CRYPTO_MAX_ALG_NAME];
+	char driver_name[CRYPTO_MAX_ALG_NAME];
+	unsigned int blocksize;
+	struct ahash_alg template_ahash;
+	u32 alg_type;
+	u32 alg_op;
+};
+
+/* ahash descriptors */
+static struct caam_hash_template driver_hash[] = {
+	{
+		.name = "hmac(sha1)",
+		.driver_name = "hmac-sha1-caam",
+		.blocksize = SHA1_BLOCK_SIZE,
+		.template_ahash = {
+			.init = ahash_init,
+			.update = ahash_update,
+			.final = ahash_final,
+			.finup = ahash_finup,
+			.digest = ahash_digest,
+			.export = ahash_export,
+			.import = ahash_import,
+			.setkey = ahash_setkey,
+			.halg = {
+				.digestsize = SHA1_DIGEST_SIZE,
+				},
+			},
+		.alg_type = OP_ALG_ALGSEL_SHA1,
+		.alg_op = OP_ALG_ALGSEL_SHA1 | OP_ALG_AAI_HMAC,
+	}, {
+		.name = "hmac(sha224)",
+		.driver_name = "hmac-sha224-caam",
+		.blocksize = SHA224_BLOCK_SIZE,
+		.template_ahash = {
+			.init = ahash_init,
+			.update = ahash_update,
+			.final = ahash_final,
+			.finup = ahash_finup,
+			.digest = ahash_digest,
+			.export = ahash_export,
+			.import = ahash_import,
+			.setkey = ahash_setkey,
+			.halg = {
+				.digestsize = SHA224_DIGEST_SIZE,
+				},
+			},
+		.alg_type = OP_ALG_ALGSEL_SHA224,
+		.alg_op = OP_ALG_ALGSEL_SHA224 | OP_ALG_AAI_HMAC,
+	}, {
+		.name = "hmac(sha256)",
+		.driver_name = "hmac-sha256-caam",
+		.blocksize = SHA256_BLOCK_SIZE,
+		.template_ahash = {
+			.init = ahash_init,
+			.update = ahash_update,
+			.final = ahash_final,
+			.finup = ahash_finup,
+			.digest = ahash_digest,
+			.export = ahash_export,
+			.import = ahash_import,
+			.setkey = ahash_setkey,
+			.halg = {
+				.digestsize = SHA256_DIGEST_SIZE,
+				},
+			},
+		.alg_type = OP_ALG_ALGSEL_SHA256,
+		.alg_op = OP_ALG_ALGSEL_SHA256 | OP_ALG_AAI_HMAC,
+	}, {
+		.name = "hmac(sha384)",
+		.driver_name = "hmac-sha384-caam",
+		.blocksize = SHA384_BLOCK_SIZE,
+		.template_ahash = {
+			.init = ahash_init,
+			.update = ahash_update,
+			.final = ahash_final,
+			.finup = ahash_finup,
+			.digest = ahash_digest,
+			.export = ahash_export,
+			.import = ahash_import,
+			.setkey = ahash_setkey,
+			.halg = {
+				.digestsize = SHA384_DIGEST_SIZE,
+				},
+			},
+		.alg_type = OP_ALG_ALGSEL_SHA384,
+		.alg_op = OP_ALG_ALGSEL_SHA384 | OP_ALG_AAI_HMAC,
+	}, {
+		.name = "hmac(sha512)",
+		.driver_name = "hmac-sha512-caam",
+		.blocksize = SHA512_BLOCK_SIZE,
+		.template_ahash = {
+			.init = ahash_init,
+			.update = ahash_update,
+			.final = ahash_final,
+			.finup = ahash_finup,
+			.digest = ahash_digest,
+			.export = ahash_export,
+			.import = ahash_import,
+			.setkey = ahash_setkey,
+			.halg = {
+				.digestsize = SHA512_DIGEST_SIZE,
+				},
+			},
+		.alg_type = OP_ALG_ALGSEL_SHA512,
+		.alg_op = OP_ALG_ALGSEL_SHA512 | OP_ALG_AAI_HMAC,
+	}, {
+		.name = "hmac(md5)",
+		.driver_name = "hmac-md5-caam",
+		.blocksize = MD5_BLOCK_WORDS * 4,
+		.template_ahash = {
+			.init = ahash_init,
+			.update = ahash_update,
+			.final = ahash_final,
+			.finup = ahash_finup,
+			.digest = ahash_digest,
+			.export = ahash_export,
+			.import = ahash_import,
+			.setkey = ahash_setkey,
+			.halg = {
+				.digestsize = MD5_DIGEST_SIZE,
+				},
+			},
+		.alg_type = OP_ALG_ALGSEL_MD5,
+		.alg_op = OP_ALG_ALGSEL_MD5 | OP_ALG_AAI_HMAC,
+	},
+};
+
+struct caam_hash_alg {
+	struct list_head entry;
+	struct device *ctrldev;
+	int alg_type;
+	int alg_op;
+	struct ahash_alg ahash_alg;
+};
+
+static int caam_hash_cra_init(struct crypto_tfm *tfm)
+{
+	struct crypto_ahash *ahash = __crypto_ahash_cast(tfm);
+	struct crypto_alg *base = tfm->__crt_alg;
+	struct hash_alg_common *halg =
+		 container_of(base, struct hash_alg_common, base);
+	struct ahash_alg *alg =
+		 container_of(halg, struct ahash_alg, halg);
+	struct caam_hash_alg *caam_hash =
+		 container_of(alg, struct caam_hash_alg, ahash_alg);
+	struct caam_hash_ctx *ctx = crypto_tfm_ctx(tfm);
+	struct caam_drv_private *priv = dev_get_drvdata(caam_hash->ctrldev);
+	/* Sizes for MDHA running digests: MD5, SHA1, 224, 256, 384, 512 */
+	static const u8 runninglen[] = { HASH_MSG_LEN + MD5_DIGEST_SIZE,
+					 HASH_MSG_LEN + SHA1_DIGEST_SIZE,
+					 HASH_MSG_LEN + 32,
+					 HASH_MSG_LEN + SHA256_DIGEST_SIZE,
+					 HASH_MSG_LEN + 64,
+					 HASH_MSG_LEN + SHA512_DIGEST_SIZE };
+	int tgt_jr = atomic_inc_return(&priv->tfm_count);
+	int ret = 0;
+
+	/*
+	 * distribute tfms across job rings to ensure in-order
+	 * crypto request processing per tfm
+	 */
+	ctx->jrdev = priv->jrdev[tgt_jr % priv->total_jobrs];
+
+	/* copy descriptor header template value */
+	ctx->alg_type = OP_TYPE_CLASS2_ALG | caam_hash->alg_type;
+	ctx->alg_op = OP_TYPE_CLASS2_ALG | caam_hash->alg_op;
+
+	ctx->ctx_len = runninglen[(ctx->alg_op & OP_ALG_ALGSEL_SUBMASK) >>
+				  OP_ALG_ALGSEL_SHIFT];
+
+	crypto_ahash_set_reqsize(__crypto_ahash_cast(tfm),
+				 sizeof(struct caam_hash_state));
+
+	ret = ahash_set_sh_desc(ahash);
+
+	return ret;
+}
+
+static void caam_hash_cra_exit(struct crypto_tfm *tfm)
+{
+	struct caam_hash_ctx *ctx = crypto_tfm_ctx(tfm);
+
+	if (ctx->sh_desc_update_dma &&
+	    !dma_mapping_error(ctx->jrdev, ctx->sh_desc_update_dma))
+		dma_unmap_single(ctx->jrdev, ctx->sh_desc_update_dma,
+				 desc_bytes(ctx->sh_desc_update),
+				 DMA_TO_DEVICE);
+	if (ctx->sh_desc_update_first_dma &&
+	    !dma_mapping_error(ctx->jrdev, ctx->sh_desc_update_first_dma))
+		dma_unmap_single(ctx->jrdev, ctx->sh_desc_update_first_dma,
+				 desc_bytes(ctx->sh_desc_update_first),
+				 DMA_TO_DEVICE);
+	if (ctx->sh_desc_fin_dma &&
+	    !dma_mapping_error(ctx->jrdev, ctx->sh_desc_fin_dma))
+		dma_unmap_single(ctx->jrdev, ctx->sh_desc_fin_dma,
+				 desc_bytes(ctx->sh_desc_fin), DMA_TO_DEVICE);
+	if (ctx->sh_desc_digest_dma &&
+	    !dma_mapping_error(ctx->jrdev, ctx->sh_desc_digest_dma))
+		dma_unmap_single(ctx->jrdev, ctx->sh_desc_digest_dma,
+				 desc_bytes(ctx->sh_desc_digest),
+				 DMA_TO_DEVICE);
+	if (ctx->sh_desc_finup_dma &&
+	    !dma_mapping_error(ctx->jrdev, ctx->sh_desc_finup_dma))
+		dma_unmap_single(ctx->jrdev, ctx->sh_desc_finup_dma,
+				 desc_bytes(ctx->sh_desc_finup), DMA_TO_DEVICE);
+}
+
+static void __exit caam_algapi_hash_exit(void)
+{
+	struct device_node *dev_node;
+	struct platform_device *pdev;
+	struct device *ctrldev;
+	struct caam_drv_private *priv;
+	struct caam_hash_alg *t_alg, *n;
+
+	dev_node = of_find_compatible_node(NULL, NULL, "fsl,sec-v4.0");
+	if (!dev_node)
+		return;
+
+	pdev = of_find_device_by_node(dev_node);
+	if (!pdev)
+		return;
+
+	ctrldev = &pdev->dev;
+	of_node_put(dev_node);
+	priv = dev_get_drvdata(ctrldev);
+
+	if (!priv->hash_list.next)
+		return;
+
+	list_for_each_entry_safe(t_alg, n, &priv->hash_list, entry) {
+		crypto_unregister_ahash(&t_alg->ahash_alg);
+		list_del(&t_alg->entry);
+		kfree(t_alg);
+	}
+}
+
+static struct caam_hash_alg *
+caam_hash_alloc(struct device *ctrldev, struct caam_hash_template *template)
+{
+	struct caam_hash_alg *t_alg;
+	struct ahash_alg *halg;
+	struct crypto_alg *alg;
+
+	t_alg = kzalloc(sizeof(struct caam_hash_alg), GFP_KERNEL);
+	if (!t_alg) {
+		dev_err(ctrldev, "failed to allocate t_alg\n");
+		return ERR_PTR(-ENOMEM);
+	}
+
+	t_alg->ahash_alg = template->template_ahash;
+	halg = &t_alg->ahash_alg;
+	alg = &halg->halg.base;
+
+	snprintf(alg->cra_name, CRYPTO_MAX_ALG_NAME, "%s", template->name);
+	snprintf(alg->cra_driver_name, CRYPTO_MAX_ALG_NAME, "%s",
+		 template->driver_name);
+	alg->cra_module = THIS_MODULE;
+	alg->cra_init = caam_hash_cra_init;
+	alg->cra_exit = caam_hash_cra_exit;
+	alg->cra_ctxsize = sizeof(struct caam_hash_ctx);
+	alg->cra_priority = CAAM_CRA_PRIORITY;
+	alg->cra_blocksize = template->blocksize;
+	alg->cra_alignmask = 0;
+	alg->cra_flags = CRYPTO_ALG_ASYNC | CRYPTO_ALG_TYPE_AHASH;
+	alg->cra_type = &crypto_ahash_type;
+
+	t_alg->alg_type = template->alg_type;
+	t_alg->alg_op = template->alg_op;
+	t_alg->ctrldev = ctrldev;
+
+	return t_alg;
+}
+
+static int __init caam_algapi_hash_init(void)
+{
+	struct device_node *dev_node;
+	struct platform_device *pdev;
+	struct device *ctrldev;
+	struct caam_drv_private *priv;
+	int i = 0, err = 0;
+
+	dev_node = of_find_compatible_node(NULL, NULL, "fsl,sec-v4.0");
+	if (!dev_node)
+		return -ENODEV;
+
+	pdev = of_find_device_by_node(dev_node);
+	if (!pdev)
+		return -ENODEV;
+
+	ctrldev = &pdev->dev;
+	priv = dev_get_drvdata(ctrldev);
+	of_node_put(dev_node);
+
+	INIT_LIST_HEAD(&priv->hash_list);
+
+	atomic_set(&priv->tfm_count, -1);
+
+	/* register crypto algorithms the device supports */
+	for (i = 0; i < ARRAY_SIZE(driver_hash); i++) {
+		/* TODO: check if h/w supports alg */
+		struct caam_hash_alg *t_alg;
+
+		t_alg = caam_hash_alloc(ctrldev, &driver_hash[i]);
+		if (IS_ERR(t_alg)) {
+			err = PTR_ERR(t_alg);
+			dev_warn(ctrldev, "%s alg allocation failed\n",
+				 driver_hash[i].driver_name);
+			continue;
+		}
+
+		err = crypto_register_ahash(&t_alg->ahash_alg);
+		if (err) {
+			dev_warn(ctrldev, "%s alg registration failed\n",
+				t_alg->ahash_alg.halg.base.cra_driver_name);
+			kfree(t_alg);
+		} else
+			list_add_tail(&t_alg->entry, &priv->hash_list);
+	}
+
+	return err;
+}
+
+module_init(caam_algapi_hash_init);
+module_exit(caam_algapi_hash_exit);
+
+MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION("FSL CAAM support for ahash functions of crypto API");
+MODULE_AUTHOR("Freescale Semiconductor - NMG");
diff --git a/drivers/crypto/caam/compat.h b/drivers/crypto/caam/compat.h
index a63bc65..762aeff 100644
--- a/drivers/crypto/caam/compat.h
+++ b/drivers/crypto/caam/compat.h
@@ -11,6 +11,7 @@
 #include <linux/device.h>
 #include <linux/interrupt.h>
 #include <linux/crypto.h>
+#include <linux/hash.h>
 #include <linux/hw_random.h>
 #include <linux/of_platform.h>
 #include <linux/dma-mapping.h>
@@ -33,5 +34,6 @@
 #include <crypto/authenc.h>
 #include <crypto/scatterwalk.h>
 #include <crypto/internal/skcipher.h>
+#include <crypto/internal/hash.h>
 
 #endif /* !defined(CAAM_COMPAT_H) */
diff --git a/drivers/crypto/caam/intern.h b/drivers/crypto/caam/intern.h
index 462be99..ed2b739 100644
--- a/drivers/crypto/caam/intern.h
+++ b/drivers/crypto/caam/intern.h
@@ -88,6 +88,8 @@ struct caam_drv_private {
 	atomic_t tfm_count ____cacheline_aligned;
 	/* list of registered crypto algorithms (mk generic context handle?) */
 	struct list_head alg_list;
+	/* list of registered hash algorithms (mk generic context handle?) */
+	struct list_head hash_list;
 
 	/*
 	 * debugfs entries for developer view into driver/device
diff --git a/drivers/crypto/caam/sg_sw_sec4.h b/drivers/crypto/caam/sg_sw_sec4.h
index a6ad7a4..2dda9e3 100644
--- a/drivers/crypto/caam/sg_sw_sec4.h
+++ b/drivers/crypto/caam/sg_sw_sec4.h
@@ -82,3 +82,41 @@ static inline int sg_count(struct scatterlist *sg_list, int nbytes)
 
 	return sg_nents;
 }
+
+/* Copy from len bytes of sg to dest, starting from beginning */
+static inline void sg_copy(u8 *dest, struct scatterlist *sg, unsigned int len)
+{
+	struct scatterlist *current_sg = sg;
+	int cpy_index = 0, next_cpy_index = current_sg->length;
+
+	while (next_cpy_index < len) {
+		memcpy(dest + cpy_index, (u8 *) sg_virt(current_sg),
+		       current_sg->length);
+		current_sg = scatterwalk_sg_next(current_sg);
+		cpy_index = next_cpy_index;
+		next_cpy_index += current_sg->length;
+	}
+	if (cpy_index < len)
+		memcpy(dest + cpy_index, (u8 *) sg_virt(current_sg),
+		       len - cpy_index);
+}
+
+/* Copy sg data, from to_skip to end, to dest */
+static inline void sg_copy_part(u8 *dest, struct scatterlist *sg,
+				      int to_skip, unsigned int end)
+{
+	struct scatterlist *current_sg = sg;
+	int sg_index, cpy_index;
+
+	sg_index = current_sg->length;
+	while (sg_index <= to_skip) {
+		current_sg = scatterwalk_sg_next(current_sg);
+		sg_index += current_sg->length;
+	}
+	cpy_index = sg_index - to_skip;
+	memcpy(dest, (u8 *) sg_virt(current_sg) +
+	       current_sg->length - cpy_index, cpy_index);
+	current_sg = scatterwalk_sg_next(current_sg);
+	if (end - sg_index)
+		sg_copy(dest + cpy_index, current_sg, end - sg_index);
+}