xref: /openbmc/linux/drivers/crypto/inside-secure/safexcel_hash.c (revision aa88f331)

// SPDX-License-Identifier: GPL-2.0
/*
 * Copyright (C) 2017 Marvell
 *
 * Antoine Tenart <antoine.tenart@free-electrons.com>
 */

#include <crypto/hmac.h>
#include <crypto/md5.h>
#include <crypto/sha.h>
#include <linux/device.h>
#include <linux/dma-mapping.h>
#include <linux/dmapool.h>

#include "safexcel.h"

struct safexcel_ahash_ctx {
	struct safexcel_context base;
	struct safexcel_crypto_priv *priv;

	u32 alg;

	u32 ipad[SHA512_DIGEST_SIZE / sizeof(u32)];
	u32 opad[SHA512_DIGEST_SIZE / sizeof(u32)];
};

struct safexcel_ahash_req {
	bool last_req;
	bool finish;
	bool hmac;
	bool needs_inv;
	bool hmac_zlen;
	bool len_is_le;

	int nents;
	dma_addr_t result_dma;

	u32 digest;

	u8 state_sz;    /* expected state size, only set once */
	u8 block_sz;    /* block size, only set once */
	u32 state[SHA512_DIGEST_SIZE / sizeof(u32)] __aligned(sizeof(u32));

	u64 len;
	u64 processed;

	u8 cache[HASH_CACHE_SIZE] __aligned(sizeof(u32));
	dma_addr_t cache_dma;
	unsigned int cache_sz;

	u8 cache_next[HASH_CACHE_SIZE] __aligned(sizeof(u32));
};

static inline u64 safexcel_queued_len(struct safexcel_ahash_req *req)
{
	return req->len - req->processed;
}

static void safexcel_hash_token(struct safexcel_command_desc *cdesc,
				u32 input_length, u32 result_length)
{
	struct safexcel_token *token =
		(struct safexcel_token *)cdesc->control_data.token;

	token[0].opcode = EIP197_TOKEN_OPCODE_DIRECTION;
	token[0].packet_length = input_length;
	token[0].stat = EIP197_TOKEN_STAT_LAST_HASH;
	token[0].instructions = EIP197_TOKEN_INS_TYPE_HASH;

	token[1].opcode = EIP197_TOKEN_OPCODE_INSERT;
	token[1].packet_length = result_length;
	token[1].stat = EIP197_TOKEN_STAT_LAST_HASH |
			EIP197_TOKEN_STAT_LAST_PACKET;
	token[1].instructions = EIP197_TOKEN_INS_TYPE_OUTPUT |
				EIP197_TOKEN_INS_INSERT_HASH_DIGEST;
}

static void safexcel_context_control(struct safexcel_ahash_ctx *ctx,
				     struct safexcel_ahash_req *req,
				     struct safexcel_command_desc *cdesc)
{
	struct safexcel_crypto_priv *priv = ctx->priv;
	u64 count = 0;

	cdesc->control_data.control0 |= ctx->alg;

	/*
	 * Copy the input digest if needed, and setup the context
	 * fields. Do this now as we need it to setup the first command
	 * descriptor.
	 */
	if (!req->processed) {
		/* First - and possibly only - block of basic hash only */
		if (req->finish) {
			cdesc->control_data.control0 |=
				CONTEXT_CONTROL_TYPE_HASH_OUT |
				CONTEXT_CONTROL_RESTART_HASH  |
				/* ensure its not 0! */
				CONTEXT_CONTROL_SIZE(1);
		} else {
			cdesc->control_data.control0 |=
				CONTEXT_CONTROL_TYPE_HASH_OUT  |
				CONTEXT_CONTROL_RESTART_HASH   |
				CONTEXT_CONTROL_NO_FINISH_HASH |
				/* ensure its not 0! */
				CONTEXT_CONTROL_SIZE(1);
		}
		return;
	}

	/* Hash continuation or HMAC, setup (inner) digest from state */
	memcpy(ctx->base.ctxr->data, req->state, req->state_sz);

	if (req->finish) {
		/* Compute digest count for hash/HMAC finish operations */
		if ((req->digest == CONTEXT_CONTROL_DIGEST_PRECOMPUTED) ||
		    req->hmac_zlen || (req->processed != req->block_sz)) {
			count = req->processed / EIP197_COUNTER_BLOCK_SIZE;

			/* This is a hardware limitation, as the
			 * counter must fit into an u32. This represents
			 * a fairly big amount of input data, so we
			 * shouldn't see this.
			 */
			if (unlikely(count & 0xffffffff00000000ULL)) {
				dev_warn(priv->dev,
					 "Input data is too big\n");
				return;
			}
		}

		if ((req->digest == CONTEXT_CONTROL_DIGEST_PRECOMPUTED) ||
		    /* Special case: zero length HMAC */
		    req->hmac_zlen ||
		    /* PE HW < 4.4 cannot do HMAC continue, fake using hash */
		    (req->processed != req->block_sz)) {
			/* Basic hash continue operation, need digest + cnt */
			cdesc->control_data.control0 |=
				CONTEXT_CONTROL_SIZE((req->state_sz >> 2) + 1) |
				CONTEXT_CONTROL_TYPE_HASH_OUT |
				CONTEXT_CONTROL_DIGEST_PRECOMPUTED;
			/* For zero-len HMAC, don't finalize, already padded! */
			if (req->hmac_zlen)
				cdesc->control_data.control0 |=
					CONTEXT_CONTROL_NO_FINISH_HASH;
			cdesc->control_data.control1 |=
				CONTEXT_CONTROL_DIGEST_CNT;
			ctx->base.ctxr->data[req->state_sz >> 2] =
				cpu_to_le32(count);
			req->digest = CONTEXT_CONTROL_DIGEST_PRECOMPUTED;

			/* Clear zero-length HMAC flag for next operation! */
			req->hmac_zlen = false;
		} else { /* HMAC */
			/* Need outer digest for HMAC finalization */
			memcpy(ctx->base.ctxr->data + (req->state_sz >> 2),
			       ctx->opad, req->state_sz);

			/* Single pass HMAC - no digest count */
			cdesc->control_data.control0 |=
				CONTEXT_CONTROL_SIZE(req->state_sz >> 1) |
				CONTEXT_CONTROL_TYPE_HASH_OUT |
				CONTEXT_CONTROL_DIGEST_HMAC;
		}
	} else { /* Hash continuation, do not finish yet */
		cdesc->control_data.control0 |=
			CONTEXT_CONTROL_SIZE(req->state_sz >> 2) |
			CONTEXT_CONTROL_DIGEST_PRECOMPUTED |
			CONTEXT_CONTROL_TYPE_HASH_OUT |
			CONTEXT_CONTROL_NO_FINISH_HASH;
	}
}

static int safexcel_ahash_enqueue(struct ahash_request *areq);

static int safexcel_handle_req_result(struct safexcel_crypto_priv *priv,
				      int ring,
				      struct crypto_async_request *async,
				      bool *should_complete, int *ret)
{
	struct safexcel_result_desc *rdesc;
	struct ahash_request *areq = ahash_request_cast(async);
	struct crypto_ahash *ahash = crypto_ahash_reqtfm(areq);
	struct safexcel_ahash_req *sreq = ahash_request_ctx(areq);
	struct safexcel_ahash_ctx *ctx = crypto_ahash_ctx(ahash);
	u64 cache_len;

	*ret = 0;

	rdesc = safexcel_ring_next_rptr(priv, &priv->ring[ring].rdr);
	if (IS_ERR(rdesc)) {
		dev_err(priv->dev,
			"hash: result: could not retrieve the result descriptor\n");
		*ret = PTR_ERR(rdesc);
	} else {
		*ret = safexcel_rdesc_check_errors(priv, rdesc);
	}

	safexcel_complete(priv, ring);

	if (sreq->nents) {
		dma_unmap_sg(priv->dev, areq->src, sreq->nents, DMA_TO_DEVICE);
		sreq->nents = 0;
	}

	if (sreq->result_dma) {
		dma_unmap_single(priv->dev, sreq->result_dma, sreq->state_sz,
				 DMA_FROM_DEVICE);
		sreq->result_dma = 0;
	}

	if (sreq->cache_dma) {
		dma_unmap_single(priv->dev, sreq->cache_dma, sreq->cache_sz,
				 DMA_TO_DEVICE);
		sreq->cache_dma = 0;
		sreq->cache_sz = 0;
	}

	if (sreq->finish) {
		if (sreq->hmac &&
		    (sreq->digest != CONTEXT_CONTROL_DIGEST_HMAC)) {
			/* Faking HMAC using hash - need to do outer hash */
			memcpy(sreq->cache, sreq->state,
			       crypto_ahash_digestsize(ahash));

			memcpy(sreq->state, ctx->opad, sreq->state_sz);

			sreq->len = sreq->block_sz +
				    crypto_ahash_digestsize(ahash);
			sreq->processed = sreq->block_sz;
			sreq->hmac = 0;

			ctx->base.needs_inv = true;
			areq->nbytes = 0;
			safexcel_ahash_enqueue(areq);

			*should_complete = false; /* Not done yet */
			return 1;
		}

		memcpy(areq->result, sreq->state,
		       crypto_ahash_digestsize(ahash));
	}

	cache_len = safexcel_queued_len(sreq);
	if (cache_len)
		memcpy(sreq->cache, sreq->cache_next, cache_len);

	*should_complete = true;

	return 1;
}

static int safexcel_ahash_send_req(struct crypto_async_request *async, int ring,
				   int *commands, int *results)
{
	struct ahash_request *areq = ahash_request_cast(async);
	struct safexcel_ahash_req *req = ahash_request_ctx(areq);
	struct safexcel_ahash_ctx *ctx = crypto_ahash_ctx(crypto_ahash_reqtfm(areq));
	struct safexcel_crypto_priv *priv = ctx->priv;
	struct safexcel_command_desc *cdesc, *first_cdesc = NULL;
	struct safexcel_result_desc *rdesc;
	struct scatterlist *sg;
	int i, extra = 0, n_cdesc = 0, ret = 0;
	u64 queued, len, cache_len;

	queued = len = safexcel_queued_len(req);
	if (queued <= HASH_CACHE_SIZE)
		cache_len = queued;
	else
		cache_len = queued - areq->nbytes;

	if (!req->finish && !req->last_req) {
		/* If this is not the last request and the queued data does not
		 * fit into full cache blocks, cache it for the next send call.
		 */
		extra = queued & (HASH_CACHE_SIZE - 1);

		/* If this is not the last request and the queued data
		 * is a multiple of a block, cache the last one for now.
		 */
		if (!extra)
			extra = HASH_CACHE_SIZE;

		sg_pcopy_to_buffer(areq->src, sg_nents(areq->src),
				   req->cache_next, extra,
				   areq->nbytes - extra);

		queued -= extra;
		len -= extra;

		if (!queued) {
			*commands = 0;
			*results = 0;
			return 0;
		}
	}

	/* Add a command descriptor for the cached data, if any */
	if (cache_len) {
		req->cache_dma = dma_map_single(priv->dev, req->cache,
						cache_len, DMA_TO_DEVICE);
		if (dma_mapping_error(priv->dev, req->cache_dma))
			return -EINVAL;

		req->cache_sz = cache_len;
		first_cdesc = safexcel_add_cdesc(priv, ring, 1,
						 (cache_len == len),
						 req->cache_dma, cache_len, len,
						 ctx->base.ctxr_dma);
		if (IS_ERR(first_cdesc)) {
			ret = PTR_ERR(first_cdesc);
			goto unmap_cache;
		}
		n_cdesc++;

		queued -= cache_len;
		if (!queued)
			goto send_command;
	}

	/* Skip descriptor generation for zero-length requests */
	if (!areq->nbytes)
		goto send_command;

	/* Now handle the current ahash request buffer(s) */
	req->nents = dma_map_sg(priv->dev, areq->src,
				sg_nents_for_len(areq->src,
						 areq->nbytes),
				DMA_TO_DEVICE);
	if (!req->nents) {
		ret = -ENOMEM;
		goto cdesc_rollback;
	}

	for_each_sg(areq->src, sg, req->nents, i) {
		int sglen = sg_dma_len(sg);

		/* Do not overflow the request */
		if (queued < sglen)
			sglen = queued;

		cdesc = safexcel_add_cdesc(priv, ring, !n_cdesc,
					   !(queued - sglen),
					   sg_dma_address(sg),
					   sglen, len, ctx->base.ctxr_dma);
		if (IS_ERR(cdesc)) {
			ret = PTR_ERR(cdesc);
			goto unmap_sg;
		}
		n_cdesc++;

		if (n_cdesc == 1)
			first_cdesc = cdesc;

		queued -= sglen;
		if (!queued)
			break;
	}

send_command:
	/* Setup the context options */
	safexcel_context_control(ctx, req, first_cdesc);

	/* Add the token */
	safexcel_hash_token(first_cdesc, len, req->state_sz);

	req->result_dma = dma_map_single(priv->dev, req->state, req->state_sz,
					 DMA_FROM_DEVICE);
	if (dma_mapping_error(priv->dev, req->result_dma)) {
		ret = -EINVAL;
		goto unmap_sg;
	}

	/* Add a result descriptor */
	rdesc = safexcel_add_rdesc(priv, ring, 1, 1, req->result_dma,
				   req->state_sz);
	if (IS_ERR(rdesc)) {
		ret = PTR_ERR(rdesc);
		goto unmap_result;
	}

	safexcel_rdr_req_set(priv, ring, rdesc, &areq->base);

	req->processed += len;

	*commands = n_cdesc;
	*results = 1;
	return 0;

unmap_result:
	dma_unmap_single(priv->dev, req->result_dma, req->state_sz,
			 DMA_FROM_DEVICE);
unmap_sg:
	dma_unmap_sg(priv->dev, areq->src, req->nents, DMA_TO_DEVICE);
cdesc_rollback:
	for (i = 0; i < n_cdesc; i++)
		safexcel_ring_rollback_wptr(priv, &priv->ring[ring].cdr);
unmap_cache:
	if (req->cache_dma) {
		dma_unmap_single(priv->dev, req->cache_dma, req->cache_sz,
				 DMA_TO_DEVICE);
		req->cache_dma = 0;
		req->cache_sz = 0;
	}

	return ret;
}

static int safexcel_handle_inv_result(struct safexcel_crypto_priv *priv,
				      int ring,
				      struct crypto_async_request *async,
				      bool *should_complete, int *ret)
{
	struct safexcel_result_desc *rdesc;
	struct ahash_request *areq = ahash_request_cast(async);
	struct crypto_ahash *ahash = crypto_ahash_reqtfm(areq);
	struct safexcel_ahash_ctx *ctx = crypto_ahash_ctx(ahash);
	int enq_ret;

	*ret = 0;

	rdesc = safexcel_ring_next_rptr(priv, &priv->ring[ring].rdr);
	if (IS_ERR(rdesc)) {
		dev_err(priv->dev,
			"hash: invalidate: could not retrieve the result descriptor\n");
		*ret = PTR_ERR(rdesc);
	} else {
		*ret = safexcel_rdesc_check_errors(priv, rdesc);
	}

	safexcel_complete(priv, ring);

	if (ctx->base.exit_inv) {
		dma_pool_free(priv->context_pool, ctx->base.ctxr,
			      ctx->base.ctxr_dma);

		*should_complete = true;
		return 1;
	}

	ring = safexcel_select_ring(priv);
	ctx->base.ring = ring;

	spin_lock_bh(&priv->ring[ring].queue_lock);
	enq_ret = crypto_enqueue_request(&priv->ring[ring].queue, async);
	spin_unlock_bh(&priv->ring[ring].queue_lock);

	if (enq_ret != -EINPROGRESS)
		*ret = enq_ret;

	queue_work(priv->ring[ring].workqueue,
		   &priv->ring[ring].work_data.work);

	*should_complete = false;

	return 1;
}

static int safexcel_handle_result(struct safexcel_crypto_priv *priv, int ring,
				  struct crypto_async_request *async,
				  bool *should_complete, int *ret)
{
	struct ahash_request *areq = ahash_request_cast(async);
	struct safexcel_ahash_req *req = ahash_request_ctx(areq);
	int err;

	BUG_ON(!(priv->flags & EIP197_TRC_CACHE) && req->needs_inv);

	if (req->needs_inv) {
		req->needs_inv = false;
		err = safexcel_handle_inv_result(priv, ring, async,
						 should_complete, ret);
	} else {
		err = safexcel_handle_req_result(priv, ring, async,
						 should_complete, ret);
	}

	return err;
}

static int safexcel_ahash_send_inv(struct crypto_async_request *async,
				   int ring, int *commands, int *results)
{
	struct ahash_request *areq = ahash_request_cast(async);
	struct safexcel_ahash_ctx *ctx = crypto_ahash_ctx(crypto_ahash_reqtfm(areq));
	int ret;

	ret = safexcel_invalidate_cache(async, ctx->priv,
					ctx->base.ctxr_dma, ring);
	if (unlikely(ret))
		return ret;

	*commands = 1;
	*results = 1;

	return 0;
}

static int safexcel_ahash_send(struct crypto_async_request *async,
			       int ring, int *commands, int *results)
{
	struct ahash_request *areq = ahash_request_cast(async);
	struct safexcel_ahash_req *req = ahash_request_ctx(areq);
	int ret;

	if (req->needs_inv)
		ret = safexcel_ahash_send_inv(async, ring, commands, results);
	else
		ret = safexcel_ahash_send_req(async, ring, commands, results);

	return ret;
}

static int safexcel_ahash_exit_inv(struct crypto_tfm *tfm)
{
	struct safexcel_ahash_ctx *ctx = crypto_tfm_ctx(tfm);
	struct safexcel_crypto_priv *priv = ctx->priv;
	EIP197_REQUEST_ON_STACK(req, ahash, EIP197_AHASH_REQ_SIZE);
	struct safexcel_ahash_req *rctx = ahash_request_ctx(req);
	struct safexcel_inv_result result = {};
	int ring = ctx->base.ring;

	memset(req, 0, EIP197_AHASH_REQ_SIZE);

	/* create invalidation request */
	init_completion(&result.completion);
	ahash_request_set_callback(req, CRYPTO_TFM_REQ_MAY_BACKLOG,
				   safexcel_inv_complete, &result);

	ahash_request_set_tfm(req, __crypto_ahash_cast(tfm));
	ctx = crypto_tfm_ctx(req->base.tfm);
	ctx->base.exit_inv = true;
	rctx->needs_inv = true;

	spin_lock_bh(&priv->ring[ring].queue_lock);
	crypto_enqueue_request(&priv->ring[ring].queue, &req->base);
	spin_unlock_bh(&priv->ring[ring].queue_lock);

	queue_work(priv->ring[ring].workqueue,
		   &priv->ring[ring].work_data.work);

	wait_for_completion(&result.completion);

	if (result.error) {
		dev_warn(priv->dev, "hash: completion error (%d)\n",
			 result.error);
		return result.error;
	}

	return 0;
}

/* safexcel_ahash_cache: cache data until at least one request can be sent to
 * the engine, aka. when there is at least 1 block size in the pipe.
 */
static int safexcel_ahash_cache(struct ahash_request *areq)
{
	struct safexcel_ahash_req *req = ahash_request_ctx(areq);
	u64 cache_len;

	/* cache_len: everything accepted by the driver but not sent yet,
	 * tot sz handled by update() - last req sz - tot sz handled by send()
	 */
	cache_len = safexcel_queued_len(req);

	/*
	 * In case there isn't enough bytes to proceed (less than a
	 * block size), cache the data until we have enough.
	 */
	if (cache_len + areq->nbytes <= HASH_CACHE_SIZE) {
		sg_pcopy_to_buffer(areq->src, sg_nents(areq->src),
				   req->cache + cache_len,
				   areq->nbytes, 0);
		return 0;
	}

	/* We couldn't cache all the data */
	return -E2BIG;
}

static int safexcel_ahash_enqueue(struct ahash_request *areq)
{
	struct safexcel_ahash_ctx *ctx = crypto_ahash_ctx(crypto_ahash_reqtfm(areq));
	struct safexcel_ahash_req *req = ahash_request_ctx(areq);
	struct safexcel_crypto_priv *priv = ctx->priv;
	int ret, ring;

	req->needs_inv = false;

	if (ctx->base.ctxr) {
		if (priv->flags & EIP197_TRC_CACHE && !ctx->base.needs_inv &&
		    req->processed &&
		    (/* invalidate for basic hash continuation finish */
		     (req->finish &&
		      (req->digest == CONTEXT_CONTROL_DIGEST_PRECOMPUTED)) ||
		     /* invalidate if (i)digest changed */
		     memcmp(ctx->base.ctxr->data, req->state, req->state_sz) ||
		     /* invalidate for HMAC continuation finish */
		     (req->finish && (req->processed != req->block_sz)) ||
		     /* invalidate for HMAC finish with odigest changed */
		     (req->finish &&
		      memcmp(ctx->base.ctxr->data + (req->state_sz>>2),
			     ctx->opad, req->state_sz))))
			/*
			 * We're still setting needs_inv here, even though it is
			 * cleared right away, because the needs_inv flag can be
			 * set in other functions and we want to keep the same
			 * logic.
			 */
			ctx->base.needs_inv = true;

		if (ctx->base.needs_inv) {
			ctx->base.needs_inv = false;
			req->needs_inv = true;
		}
	} else {
		ctx->base.ring = safexcel_select_ring(priv);
		ctx->base.ctxr = dma_pool_zalloc(priv->context_pool,
						 EIP197_GFP_FLAGS(areq->base),
						 &ctx->base.ctxr_dma);
		if (!ctx->base.ctxr)
			return -ENOMEM;
	}

	ring = ctx->base.ring;

	spin_lock_bh(&priv->ring[ring].queue_lock);
	ret = crypto_enqueue_request(&priv->ring[ring].queue, &areq->base);
	spin_unlock_bh(&priv->ring[ring].queue_lock);

	queue_work(priv->ring[ring].workqueue,
		   &priv->ring[ring].work_data.work);

	return ret;
}

static int safexcel_ahash_update(struct ahash_request *areq)
{
	struct safexcel_ahash_req *req = ahash_request_ctx(areq);
	int ret;

	/* If the request is 0 length, do nothing */
	if (!areq->nbytes)
		return 0;

	/* Add request to the cache if it fits */
	ret = safexcel_ahash_cache(areq);

	/* Update total request length */
	req->len += areq->nbytes;

	/* If not all data could fit into the cache, go process the excess.
	 * Also go process immediately for an HMAC IV precompute, which
	 * will never be finished at all, but needs to be processed anyway.
	 */
	if ((ret && !req->finish) || req->last_req)
		return safexcel_ahash_enqueue(areq);

	return 0;
}

static int safexcel_ahash_final(struct ahash_request *areq)
{
	struct safexcel_ahash_req *req = ahash_request_ctx(areq);
	struct safexcel_ahash_ctx *ctx = crypto_ahash_ctx(crypto_ahash_reqtfm(areq));

	req->finish = true;

	if (unlikely(!req->len && !areq->nbytes)) {
		/*
		 * If we have an overall 0 length *hash* request:
		 * The HW cannot do 0 length hash, so we provide the correct
		 * result directly here.
		 */
		if (ctx->alg == CONTEXT_CONTROL_CRYPTO_ALG_MD5)
			memcpy(areq->result, md5_zero_message_hash,
			       MD5_DIGEST_SIZE);
		else if (ctx->alg == CONTEXT_CONTROL_CRYPTO_ALG_SHA1)
			memcpy(areq->result, sha1_zero_message_hash,
			       SHA1_DIGEST_SIZE);
		else if (ctx->alg == CONTEXT_CONTROL_CRYPTO_ALG_SHA224)
			memcpy(areq->result, sha224_zero_message_hash,
			       SHA224_DIGEST_SIZE);
		else if (ctx->alg == CONTEXT_CONTROL_CRYPTO_ALG_SHA256)
			memcpy(areq->result, sha256_zero_message_hash,
			       SHA256_DIGEST_SIZE);
		else if (ctx->alg == CONTEXT_CONTROL_CRYPTO_ALG_SHA384)
			memcpy(areq->result, sha384_zero_message_hash,
			       SHA384_DIGEST_SIZE);
		else if (ctx->alg == CONTEXT_CONTROL_CRYPTO_ALG_SHA512)
			memcpy(areq->result, sha512_zero_message_hash,
			       SHA512_DIGEST_SIZE);

		return 0;
	} else if (unlikely(req->hmac &&
			    (req->len == req->block_sz) &&
			    !areq->nbytes)) {
		/*
		 * If we have an overall 0 length *HMAC* request:
		 * For HMAC, we need to finalize the inner digest
		 * and then perform the outer hash.
		 */

		/* generate pad block in the cache */
		/* start with a hash block of all zeroes */
		memset(req->cache, 0, req->block_sz);
		/* set the first byte to 0x80 to 'append a 1 bit' */
		req->cache[0] = 0x80;
		/* add the length in bits in the last 2 bytes */
		if (req->len_is_le) {
			/* Little endian length word (e.g. MD5) */
			req->cache[req->block_sz-8] = (req->block_sz << 3) &
						      255;
			req->cache[req->block_sz-7] = (req->block_sz >> 5);
		} else {
			/* Big endian length word (e.g. any SHA) */
			req->cache[req->block_sz-2] = (req->block_sz >> 5);
			req->cache[req->block_sz-1] = (req->block_sz << 3) &
						      255;
		}

		req->len += req->block_sz; /* plus 1 hash block */

		/* Set special zero-length HMAC flag */
		req->hmac_zlen = true;

		/* Finalize HMAC */
		req->digest = CONTEXT_CONTROL_DIGEST_HMAC;
	} else if (req->hmac) {
		/* Finalize HMAC */
		req->digest = CONTEXT_CONTROL_DIGEST_HMAC;
	}

	return safexcel_ahash_enqueue(areq);
}

static int safexcel_ahash_finup(struct ahash_request *areq)
{
	struct safexcel_ahash_req *req = ahash_request_ctx(areq);

	req->finish = true;

	safexcel_ahash_update(areq);
	return safexcel_ahash_final(areq);
}

static int safexcel_ahash_export(struct ahash_request *areq, void *out)
{
	struct safexcel_ahash_req *req = ahash_request_ctx(areq);
	struct safexcel_ahash_export_state *export = out;

	export->len = req->len;
	export->processed = req->processed;

	export->digest = req->digest;

	memcpy(export->state, req->state, req->state_sz);
	memcpy(export->cache, req->cache, HASH_CACHE_SIZE);

	return 0;
}

static int safexcel_ahash_import(struct ahash_request *areq, const void *in)
{
	struct safexcel_ahash_req *req = ahash_request_ctx(areq);
	const struct safexcel_ahash_export_state *export = in;
	int ret;

	ret = crypto_ahash_init(areq);
	if (ret)
		return ret;

	req->len = export->len;
	req->processed = export->processed;

	req->digest = export->digest;

	memcpy(req->cache, export->cache, HASH_CACHE_SIZE);
	memcpy(req->state, export->state, req->state_sz);

	return 0;
}

static int safexcel_ahash_cra_init(struct crypto_tfm *tfm)
{
	struct safexcel_ahash_ctx *ctx = crypto_tfm_ctx(tfm);
	struct safexcel_alg_template *tmpl =
		container_of(__crypto_ahash_alg(tfm->__crt_alg),
			     struct safexcel_alg_template, alg.ahash);

	ctx->priv = tmpl->priv;
	ctx->base.send = safexcel_ahash_send;
	ctx->base.handle_result = safexcel_handle_result;

	crypto_ahash_set_reqsize(__crypto_ahash_cast(tfm),
				 sizeof(struct safexcel_ahash_req));
	return 0;
}

static int safexcel_sha1_init(struct ahash_request *areq)
{
	struct safexcel_ahash_ctx *ctx = crypto_ahash_ctx(crypto_ahash_reqtfm(areq));
	struct safexcel_ahash_req *req = ahash_request_ctx(areq);

	memset(req, 0, sizeof(*req));

	ctx->alg = CONTEXT_CONTROL_CRYPTO_ALG_SHA1;
	req->digest = CONTEXT_CONTROL_DIGEST_PRECOMPUTED;
	req->state_sz = SHA1_DIGEST_SIZE;
	req->block_sz = SHA1_BLOCK_SIZE;

	return 0;
}

static int safexcel_sha1_digest(struct ahash_request *areq)
{
	int ret = safexcel_sha1_init(areq);

	if (ret)
		return ret;

	return safexcel_ahash_finup(areq);
}

static void safexcel_ahash_cra_exit(struct crypto_tfm *tfm)
{
	struct safexcel_ahash_ctx *ctx = crypto_tfm_ctx(tfm);
	struct safexcel_crypto_priv *priv = ctx->priv;
	int ret;

	/* context not allocated, skip invalidation */
	if (!ctx->base.ctxr)
		return;

	if (priv->flags & EIP197_TRC_CACHE) {
		ret = safexcel_ahash_exit_inv(tfm);
		if (ret)
			dev_warn(priv->dev, "hash: invalidation error %d\n", ret);
	} else {
		dma_pool_free(priv->context_pool, ctx->base.ctxr,
			      ctx->base.ctxr_dma);
	}
}

struct safexcel_alg_template safexcel_alg_sha1 = {
	.type = SAFEXCEL_ALG_TYPE_AHASH,
	.algo_mask = SAFEXCEL_ALG_SHA1,
	.alg.ahash = {
		.init = safexcel_sha1_init,
		.update = safexcel_ahash_update,
		.final = safexcel_ahash_final,
		.finup = safexcel_ahash_finup,
		.digest = safexcel_sha1_digest,
		.export = safexcel_ahash_export,
		.import = safexcel_ahash_import,
		.halg = {
			.digestsize = SHA1_DIGEST_SIZE,
			.statesize = sizeof(struct safexcel_ahash_export_state),
			.base = {
				.cra_name = "sha1",
				.cra_driver_name = "safexcel-sha1",
				.cra_priority = SAFEXCEL_CRA_PRIORITY,
				.cra_flags = CRYPTO_ALG_ASYNC |
					     CRYPTO_ALG_KERN_DRIVER_ONLY,
				.cra_blocksize = SHA1_BLOCK_SIZE,
				.cra_ctxsize = sizeof(struct safexcel_ahash_ctx),
				.cra_init = safexcel_ahash_cra_init,
				.cra_exit = safexcel_ahash_cra_exit,
				.cra_module = THIS_MODULE,
			},
		},
	},
};

static int safexcel_hmac_sha1_init(struct ahash_request *areq)
{
	struct safexcel_ahash_ctx *ctx = crypto_ahash_ctx(crypto_ahash_reqtfm(areq));
	struct safexcel_ahash_req *req = ahash_request_ctx(areq);

	memset(req, 0, sizeof(*req));

	/* Start from ipad precompute */
	memcpy(req->state, ctx->ipad, SHA1_DIGEST_SIZE);
	/* Already processed the key^ipad part now! */
	req->len	= SHA1_BLOCK_SIZE;
	req->processed	= SHA1_BLOCK_SIZE;

	ctx->alg = CONTEXT_CONTROL_CRYPTO_ALG_SHA1;
	req->digest = CONTEXT_CONTROL_DIGEST_PRECOMPUTED;
	req->state_sz = SHA1_DIGEST_SIZE;
	req->block_sz = SHA1_BLOCK_SIZE;
	req->hmac = true;

	return 0;
}

static int safexcel_hmac_sha1_digest(struct ahash_request *areq)
{
	int ret = safexcel_hmac_sha1_init(areq);

	if (ret)
		return ret;

	return safexcel_ahash_finup(areq);
}

struct safexcel_ahash_result {
	struct completion completion;
	int error;
};

static void safexcel_ahash_complete(struct crypto_async_request *req, int error)
{
	struct safexcel_ahash_result *result = req->data;

	if (error == -EINPROGRESS)
		return;

	result->error = error;
	complete(&result->completion);
}

static int safexcel_hmac_init_pad(struct ahash_request *areq,
				  unsigned int blocksize, const u8 *key,
				  unsigned int keylen, u8 *ipad, u8 *opad)
{
	struct safexcel_ahash_result result;
	struct scatterlist sg;
	int ret, i;
	u8 *keydup;

	if (keylen <= blocksize) {
		memcpy(ipad, key, keylen);
	} else {
		keydup = kmemdup(key, keylen, GFP_KERNEL);
		if (!keydup)
			return -ENOMEM;

		ahash_request_set_callback(areq, CRYPTO_TFM_REQ_MAY_BACKLOG,
					   safexcel_ahash_complete, &result);
		sg_init_one(&sg, keydup, keylen);
		ahash_request_set_crypt(areq, &sg, ipad, keylen);
		init_completion(&result.completion);

		ret = crypto_ahash_digest(areq);
		if (ret == -EINPROGRESS || ret == -EBUSY) {
			wait_for_completion_interruptible(&result.completion);
			ret = result.error;
		}

		/* Avoid leaking */
		memzero_explicit(keydup, keylen);
		kfree(keydup);

		if (ret)
			return ret;

		keylen = crypto_ahash_digestsize(crypto_ahash_reqtfm(areq));
	}

	memset(ipad + keylen, 0, blocksize - keylen);
	memcpy(opad, ipad, blocksize);

	for (i = 0; i < blocksize; i++) {
		ipad[i] ^= HMAC_IPAD_VALUE;
		opad[i] ^= HMAC_OPAD_VALUE;
	}

	return 0;
}

static int safexcel_hmac_init_iv(struct ahash_request *areq,
				 unsigned int blocksize, u8 *pad, void *state)
{
	struct safexcel_ahash_result result;
	struct safexcel_ahash_req *req;
	struct scatterlist sg;
	int ret;

	ahash_request_set_callback(areq, CRYPTO_TFM_REQ_MAY_BACKLOG,
				   safexcel_ahash_complete, &result);
	sg_init_one(&sg, pad, blocksize);
	ahash_request_set_crypt(areq, &sg, pad, blocksize);
	init_completion(&result.completion);

	ret = crypto_ahash_init(areq);
	if (ret)
		return ret;

	req = ahash_request_ctx(areq);
	req->hmac = true;
	req->last_req = true;

	ret = crypto_ahash_update(areq);
	if (ret && ret != -EINPROGRESS && ret != -EBUSY)
		return ret;

	wait_for_completion_interruptible(&result.completion);
	if (result.error)
		return result.error;

	return crypto_ahash_export(areq, state);
}

int safexcel_hmac_setkey(const char *alg, const u8 *key, unsigned int keylen,
			 void *istate, void *ostate)
{
	struct ahash_request *areq;
	struct crypto_ahash *tfm;
	unsigned int blocksize;
	u8 *ipad, *opad;
	int ret;

	tfm = crypto_alloc_ahash(alg, 0, 0);
	if (IS_ERR(tfm))
		return PTR_ERR(tfm);

	areq = ahash_request_alloc(tfm, GFP_KERNEL);
	if (!areq) {
		ret = -ENOMEM;
		goto free_ahash;
	}

	crypto_ahash_clear_flags(tfm, ~0);
	blocksize = crypto_tfm_alg_blocksize(crypto_ahash_tfm(tfm));

	ipad = kcalloc(2, blocksize, GFP_KERNEL);
	if (!ipad) {
		ret = -ENOMEM;
		goto free_request;
	}

	opad = ipad + blocksize;

	ret = safexcel_hmac_init_pad(areq, blocksize, key, keylen, ipad, opad);
	if (ret)
		goto free_ipad;

	ret = safexcel_hmac_init_iv(areq, blocksize, ipad, istate);
	if (ret)
		goto free_ipad;

	ret = safexcel_hmac_init_iv(areq, blocksize, opad, ostate);

free_ipad:
	kfree(ipad);
free_request:
	ahash_request_free(areq);
free_ahash:
	crypto_free_ahash(tfm);

	return ret;
}

static int safexcel_hmac_alg_setkey(struct crypto_ahash *tfm, const u8 *key,
				    unsigned int keylen, const char *alg,
				    unsigned int state_sz)
{
	struct safexcel_ahash_ctx *ctx = crypto_tfm_ctx(crypto_ahash_tfm(tfm));
	struct safexcel_crypto_priv *priv = ctx->priv;
	struct safexcel_ahash_export_state istate, ostate;
	int ret;

	ret = safexcel_hmac_setkey(alg, key, keylen, &istate, &ostate);
	if (ret)
		return ret;

	if (priv->flags & EIP197_TRC_CACHE && ctx->base.ctxr &&
	    (memcmp(ctx->ipad, istate.state, state_sz) ||
	     memcmp(ctx->opad, ostate.state, state_sz)))
		ctx->base.needs_inv = true;

	memcpy(ctx->ipad, &istate.state, state_sz);
	memcpy(ctx->opad, &ostate.state, state_sz);

	return 0;
}

static int safexcel_hmac_sha1_setkey(struct crypto_ahash *tfm, const u8 *key,
				     unsigned int keylen)
{
	return safexcel_hmac_alg_setkey(tfm, key, keylen, "safexcel-sha1",
					SHA1_DIGEST_SIZE);
}

struct safexcel_alg_template safexcel_alg_hmac_sha1 = {
	.type = SAFEXCEL_ALG_TYPE_AHASH,
	.algo_mask = SAFEXCEL_ALG_SHA1,
	.alg.ahash = {
		.init = safexcel_hmac_sha1_init,
		.update = safexcel_ahash_update,
		.final = safexcel_ahash_final,
		.finup = safexcel_ahash_finup,
		.digest = safexcel_hmac_sha1_digest,
		.setkey = safexcel_hmac_sha1_setkey,
		.export = safexcel_ahash_export,
		.import = safexcel_ahash_import,
		.halg = {
			.digestsize = SHA1_DIGEST_SIZE,
			.statesize = sizeof(struct safexcel_ahash_export_state),
			.base = {
				.cra_name = "hmac(sha1)",
				.cra_driver_name = "safexcel-hmac-sha1",
				.cra_priority = SAFEXCEL_CRA_PRIORITY,
				.cra_flags = CRYPTO_ALG_ASYNC |
					     CRYPTO_ALG_KERN_DRIVER_ONLY,
				.cra_blocksize = SHA1_BLOCK_SIZE,
				.cra_ctxsize = sizeof(struct safexcel_ahash_ctx),
				.cra_init = safexcel_ahash_cra_init,
				.cra_exit = safexcel_ahash_cra_exit,
				.cra_module = THIS_MODULE,
			},
		},
	},
};

static int safexcel_sha256_init(struct ahash_request *areq)
{
	struct safexcel_ahash_ctx *ctx = crypto_ahash_ctx(crypto_ahash_reqtfm(areq));
	struct safexcel_ahash_req *req = ahash_request_ctx(areq);

	memset(req, 0, sizeof(*req));

	ctx->alg = CONTEXT_CONTROL_CRYPTO_ALG_SHA256;
	req->digest = CONTEXT_CONTROL_DIGEST_PRECOMPUTED;
	req->state_sz = SHA256_DIGEST_SIZE;
	req->block_sz = SHA256_BLOCK_SIZE;

	return 0;
}

static int safexcel_sha256_digest(struct ahash_request *areq)
{
	int ret = safexcel_sha256_init(areq);

	if (ret)
		return ret;

	return safexcel_ahash_finup(areq);
}

struct safexcel_alg_template safexcel_alg_sha256 = {
	.type = SAFEXCEL_ALG_TYPE_AHASH,
	.algo_mask = SAFEXCEL_ALG_SHA2_256,
	.alg.ahash = {
		.init = safexcel_sha256_init,
		.update = safexcel_ahash_update,
		.final = safexcel_ahash_final,
		.finup = safexcel_ahash_finup,
		.digest = safexcel_sha256_digest,
		.export = safexcel_ahash_export,
		.import = safexcel_ahash_import,
		.halg = {
			.digestsize = SHA256_DIGEST_SIZE,
			.statesize = sizeof(struct safexcel_ahash_export_state),
			.base = {
				.cra_name = "sha256",
				.cra_driver_name = "safexcel-sha256",
				.cra_priority = SAFEXCEL_CRA_PRIORITY,
				.cra_flags = CRYPTO_ALG_ASYNC |
					     CRYPTO_ALG_KERN_DRIVER_ONLY,
				.cra_blocksize = SHA256_BLOCK_SIZE,
				.cra_ctxsize = sizeof(struct safexcel_ahash_ctx),
				.cra_init = safexcel_ahash_cra_init,
				.cra_exit = safexcel_ahash_cra_exit,
				.cra_module = THIS_MODULE,
			},
		},
	},
};

static int safexcel_sha224_init(struct ahash_request *areq)
{
	struct safexcel_ahash_ctx *ctx = crypto_ahash_ctx(crypto_ahash_reqtfm(areq));
	struct safexcel_ahash_req *req = ahash_request_ctx(areq);

	memset(req, 0, sizeof(*req));

	ctx->alg = CONTEXT_CONTROL_CRYPTO_ALG_SHA224;
	req->digest = CONTEXT_CONTROL_DIGEST_PRECOMPUTED;
	req->state_sz = SHA256_DIGEST_SIZE;
	req->block_sz = SHA256_BLOCK_SIZE;

	return 0;
}

static int safexcel_sha224_digest(struct ahash_request *areq)
{
	int ret = safexcel_sha224_init(areq);

	if (ret)
		return ret;

	return safexcel_ahash_finup(areq);
}

struct safexcel_alg_template safexcel_alg_sha224 = {
	.type = SAFEXCEL_ALG_TYPE_AHASH,
	.algo_mask = SAFEXCEL_ALG_SHA2_256,
	.alg.ahash = {
		.init = safexcel_sha224_init,
		.update = safexcel_ahash_update,
		.final = safexcel_ahash_final,
		.finup = safexcel_ahash_finup,
		.digest = safexcel_sha224_digest,
		.export = safexcel_ahash_export,
		.import = safexcel_ahash_import,
		.halg = {
			.digestsize = SHA224_DIGEST_SIZE,
			.statesize = sizeof(struct safexcel_ahash_export_state),
			.base = {
				.cra_name = "sha224",
				.cra_driver_name = "safexcel-sha224",
				.cra_priority = SAFEXCEL_CRA_PRIORITY,
				.cra_flags = CRYPTO_ALG_ASYNC |
					     CRYPTO_ALG_KERN_DRIVER_ONLY,
				.cra_blocksize = SHA224_BLOCK_SIZE,
				.cra_ctxsize = sizeof(struct safexcel_ahash_ctx),
				.cra_init = safexcel_ahash_cra_init,
				.cra_exit = safexcel_ahash_cra_exit,
				.cra_module = THIS_MODULE,
			},
		},
	},
};

static int safexcel_hmac_sha224_setkey(struct crypto_ahash *tfm, const u8 *key,
				       unsigned int keylen)
{
	return safexcel_hmac_alg_setkey(tfm, key, keylen, "safexcel-sha224",
					SHA256_DIGEST_SIZE);
}

static int safexcel_hmac_sha224_init(struct ahash_request *areq)
{
	struct safexcel_ahash_ctx *ctx = crypto_ahash_ctx(crypto_ahash_reqtfm(areq));
	struct safexcel_ahash_req *req = ahash_request_ctx(areq);

	memset(req, 0, sizeof(*req));

	/* Start from ipad precompute */
	memcpy(req->state, ctx->ipad, SHA256_DIGEST_SIZE);
	/* Already processed the key^ipad part now! */
	req->len	= SHA256_BLOCK_SIZE;
	req->processed	= SHA256_BLOCK_SIZE;

	ctx->alg = CONTEXT_CONTROL_CRYPTO_ALG_SHA224;
	req->digest = CONTEXT_CONTROL_DIGEST_PRECOMPUTED;
	req->state_sz = SHA256_DIGEST_SIZE;
	req->block_sz = SHA256_BLOCK_SIZE;
	req->hmac = true;

	return 0;
}

static int safexcel_hmac_sha224_digest(struct ahash_request *areq)
{
	int ret = safexcel_hmac_sha224_init(areq);

	if (ret)
		return ret;

	return safexcel_ahash_finup(areq);
}

struct safexcel_alg_template safexcel_alg_hmac_sha224 = {
	.type = SAFEXCEL_ALG_TYPE_AHASH,
	.algo_mask = SAFEXCEL_ALG_SHA2_256,
	.alg.ahash = {
		.init = safexcel_hmac_sha224_init,
		.update = safexcel_ahash_update,
		.final = safexcel_ahash_final,
		.finup = safexcel_ahash_finup,
		.digest = safexcel_hmac_sha224_digest,
		.setkey = safexcel_hmac_sha224_setkey,
		.export = safexcel_ahash_export,
		.import = safexcel_ahash_import,
		.halg = {
			.digestsize = SHA224_DIGEST_SIZE,
			.statesize = sizeof(struct safexcel_ahash_export_state),
			.base = {
				.cra_name = "hmac(sha224)",
				.cra_driver_name = "safexcel-hmac-sha224",
				.cra_priority = SAFEXCEL_CRA_PRIORITY,
				.cra_flags = CRYPTO_ALG_ASYNC |
					     CRYPTO_ALG_KERN_DRIVER_ONLY,
				.cra_blocksize = SHA224_BLOCK_SIZE,
				.cra_ctxsize = sizeof(struct safexcel_ahash_ctx),
				.cra_init = safexcel_ahash_cra_init,
				.cra_exit = safexcel_ahash_cra_exit,
				.cra_module = THIS_MODULE,
			},
		},
	},
};

static int safexcel_hmac_sha256_setkey(struct crypto_ahash *tfm, const u8 *key,
				     unsigned int keylen)
{
	return safexcel_hmac_alg_setkey(tfm, key, keylen, "safexcel-sha256",
					SHA256_DIGEST_SIZE);
}

static int safexcel_hmac_sha256_init(struct ahash_request *areq)
{
	struct safexcel_ahash_ctx *ctx = crypto_ahash_ctx(crypto_ahash_reqtfm(areq));
	struct safexcel_ahash_req *req = ahash_request_ctx(areq);

	memset(req, 0, sizeof(*req));

	/* Start from ipad precompute */
	memcpy(req->state, ctx->ipad, SHA256_DIGEST_SIZE);
	/* Already processed the key^ipad part now! */
	req->len	= SHA256_BLOCK_SIZE;
	req->processed	= SHA256_BLOCK_SIZE;

	ctx->alg = CONTEXT_CONTROL_CRYPTO_ALG_SHA256;
	req->digest = CONTEXT_CONTROL_DIGEST_PRECOMPUTED;
	req->state_sz = SHA256_DIGEST_SIZE;
	req->block_sz = SHA256_BLOCK_SIZE;
	req->hmac = true;

	return 0;
}

static int safexcel_hmac_sha256_digest(struct ahash_request *areq)
{
	int ret = safexcel_hmac_sha256_init(areq);

	if (ret)
		return ret;

	return safexcel_ahash_finup(areq);
}

struct safexcel_alg_template safexcel_alg_hmac_sha256 = {
	.type = SAFEXCEL_ALG_TYPE_AHASH,
	.algo_mask = SAFEXCEL_ALG_SHA2_256,
	.alg.ahash = {
		.init = safexcel_hmac_sha256_init,
		.update = safexcel_ahash_update,
		.final = safexcel_ahash_final,
		.finup = safexcel_ahash_finup,
		.digest = safexcel_hmac_sha256_digest,
		.setkey = safexcel_hmac_sha256_setkey,
		.export = safexcel_ahash_export,
		.import = safexcel_ahash_import,
		.halg = {
			.digestsize = SHA256_DIGEST_SIZE,
			.statesize = sizeof(struct safexcel_ahash_export_state),
			.base = {
				.cra_name = "hmac(sha256)",
				.cra_driver_name = "safexcel-hmac-sha256",
				.cra_priority = SAFEXCEL_CRA_PRIORITY,
				.cra_flags = CRYPTO_ALG_ASYNC |
					     CRYPTO_ALG_KERN_DRIVER_ONLY,
				.cra_blocksize = SHA256_BLOCK_SIZE,
				.cra_ctxsize = sizeof(struct safexcel_ahash_ctx),
				.cra_init = safexcel_ahash_cra_init,
				.cra_exit = safexcel_ahash_cra_exit,
				.cra_module = THIS_MODULE,
			},
		},
	},
};

static int safexcel_sha512_init(struct ahash_request *areq)
{
	struct safexcel_ahash_ctx *ctx = crypto_ahash_ctx(crypto_ahash_reqtfm(areq));
	struct safexcel_ahash_req *req = ahash_request_ctx(areq);

	memset(req, 0, sizeof(*req));

	ctx->alg = CONTEXT_CONTROL_CRYPTO_ALG_SHA512;
	req->digest = CONTEXT_CONTROL_DIGEST_PRECOMPUTED;
	req->state_sz = SHA512_DIGEST_SIZE;
	req->block_sz = SHA512_BLOCK_SIZE;

	return 0;
}

static int safexcel_sha512_digest(struct ahash_request *areq)
{
	int ret = safexcel_sha512_init(areq);

	if (ret)
		return ret;

	return safexcel_ahash_finup(areq);
}

struct safexcel_alg_template safexcel_alg_sha512 = {
	.type = SAFEXCEL_ALG_TYPE_AHASH,
	.algo_mask = SAFEXCEL_ALG_SHA2_512,
	.alg.ahash = {
		.init = safexcel_sha512_init,
		.update = safexcel_ahash_update,
		.final = safexcel_ahash_final,
		.finup = safexcel_ahash_finup,
		.digest = safexcel_sha512_digest,
		.export = safexcel_ahash_export,
		.import = safexcel_ahash_import,
		.halg = {
			.digestsize = SHA512_DIGEST_SIZE,
			.statesize = sizeof(struct safexcel_ahash_export_state),
			.base = {
				.cra_name = "sha512",
				.cra_driver_name = "safexcel-sha512",
				.cra_priority = SAFEXCEL_CRA_PRIORITY,
				.cra_flags = CRYPTO_ALG_ASYNC |
					     CRYPTO_ALG_KERN_DRIVER_ONLY,
				.cra_blocksize = SHA512_BLOCK_SIZE,
				.cra_ctxsize = sizeof(struct safexcel_ahash_ctx),
				.cra_init = safexcel_ahash_cra_init,
				.cra_exit = safexcel_ahash_cra_exit,
				.cra_module = THIS_MODULE,
			},
		},
	},
};

static int safexcel_sha384_init(struct ahash_request *areq)
{
	struct safexcel_ahash_ctx *ctx = crypto_ahash_ctx(crypto_ahash_reqtfm(areq));
	struct safexcel_ahash_req *req = ahash_request_ctx(areq);

	memset(req, 0, sizeof(*req));

	ctx->alg = CONTEXT_CONTROL_CRYPTO_ALG_SHA384;
	req->digest = CONTEXT_CONTROL_DIGEST_PRECOMPUTED;
	req->state_sz = SHA512_DIGEST_SIZE;
	req->block_sz = SHA512_BLOCK_SIZE;

	return 0;
}

static int safexcel_sha384_digest(struct ahash_request *areq)
{
	int ret = safexcel_sha384_init(areq);

	if (ret)
		return ret;

	return safexcel_ahash_finup(areq);
}

struct safexcel_alg_template safexcel_alg_sha384 = {
	.type = SAFEXCEL_ALG_TYPE_AHASH,
	.algo_mask = SAFEXCEL_ALG_SHA2_512,
	.alg.ahash = {
		.init = safexcel_sha384_init,
		.update = safexcel_ahash_update,
		.final = safexcel_ahash_final,
		.finup = safexcel_ahash_finup,
		.digest = safexcel_sha384_digest,
		.export = safexcel_ahash_export,
		.import = safexcel_ahash_import,
		.halg = {
			.digestsize = SHA384_DIGEST_SIZE,
			.statesize = sizeof(struct safexcel_ahash_export_state),
			.base = {
				.cra_name = "sha384",
				.cra_driver_name = "safexcel-sha384",
				.cra_priority = SAFEXCEL_CRA_PRIORITY,
				.cra_flags = CRYPTO_ALG_ASYNC |
					     CRYPTO_ALG_KERN_DRIVER_ONLY,
				.cra_blocksize = SHA384_BLOCK_SIZE,
				.cra_ctxsize = sizeof(struct safexcel_ahash_ctx),
				.cra_init = safexcel_ahash_cra_init,
				.cra_exit = safexcel_ahash_cra_exit,
				.cra_module = THIS_MODULE,
			},
		},
	},
};

static int safexcel_hmac_sha512_setkey(struct crypto_ahash *tfm, const u8 *key,
				       unsigned int keylen)
{
	return safexcel_hmac_alg_setkey(tfm, key, keylen, "safexcel-sha512",
					SHA512_DIGEST_SIZE);
}

static int safexcel_hmac_sha512_init(struct ahash_request *areq)
{
	struct safexcel_ahash_ctx *ctx = crypto_ahash_ctx(crypto_ahash_reqtfm(areq));
	struct safexcel_ahash_req *req = ahash_request_ctx(areq);

	memset(req, 0, sizeof(*req));

	/* Start from ipad precompute */
	memcpy(req->state, ctx->ipad, SHA512_DIGEST_SIZE);
	/* Already processed the key^ipad part now! */
	req->len	= SHA512_BLOCK_SIZE;
	req->processed	= SHA512_BLOCK_SIZE;

	ctx->alg = CONTEXT_CONTROL_CRYPTO_ALG_SHA512;
	req->digest = CONTEXT_CONTROL_DIGEST_PRECOMPUTED;
	req->state_sz = SHA512_DIGEST_SIZE;
	req->block_sz = SHA512_BLOCK_SIZE;
	req->hmac = true;

	return 0;
}

static int safexcel_hmac_sha512_digest(struct ahash_request *areq)
{
	int ret = safexcel_hmac_sha512_init(areq);

	if (ret)
		return ret;

	return safexcel_ahash_finup(areq);
}

struct safexcel_alg_template safexcel_alg_hmac_sha512 = {
	.type = SAFEXCEL_ALG_TYPE_AHASH,
	.algo_mask = SAFEXCEL_ALG_SHA2_512,
	.alg.ahash = {
		.init = safexcel_hmac_sha512_init,
		.update = safexcel_ahash_update,
		.final = safexcel_ahash_final,
		.finup = safexcel_ahash_finup,
		.digest = safexcel_hmac_sha512_digest,
		.setkey = safexcel_hmac_sha512_setkey,
		.export = safexcel_ahash_export,
		.import = safexcel_ahash_import,
		.halg = {
			.digestsize = SHA512_DIGEST_SIZE,
			.statesize = sizeof(struct safexcel_ahash_export_state),
			.base = {
				.cra_name = "hmac(sha512)",
				.cra_driver_name = "safexcel-hmac-sha512",
				.cra_priority = SAFEXCEL_CRA_PRIORITY,
				.cra_flags = CRYPTO_ALG_ASYNC |
					     CRYPTO_ALG_KERN_DRIVER_ONLY,
				.cra_blocksize = SHA512_BLOCK_SIZE,
				.cra_ctxsize = sizeof(struct safexcel_ahash_ctx),
				.cra_init = safexcel_ahash_cra_init,
				.cra_exit = safexcel_ahash_cra_exit,
				.cra_module = THIS_MODULE,
			},
		},
	},
};

static int safexcel_hmac_sha384_setkey(struct crypto_ahash *tfm, const u8 *key,
				       unsigned int keylen)
{
	return safexcel_hmac_alg_setkey(tfm, key, keylen, "safexcel-sha384",
					SHA512_DIGEST_SIZE);
}

static int safexcel_hmac_sha384_init(struct ahash_request *areq)
{
	struct safexcel_ahash_ctx *ctx = crypto_ahash_ctx(crypto_ahash_reqtfm(areq));
	struct safexcel_ahash_req *req = ahash_request_ctx(areq);

	memset(req, 0, sizeof(*req));

	/* Start from ipad precompute */
	memcpy(req->state, ctx->ipad, SHA512_DIGEST_SIZE);
	/* Already processed the key^ipad part now! */
	req->len	= SHA512_BLOCK_SIZE;
	req->processed	= SHA512_BLOCK_SIZE;

	ctx->alg = CONTEXT_CONTROL_CRYPTO_ALG_SHA384;
	req->digest = CONTEXT_CONTROL_DIGEST_PRECOMPUTED;
	req->state_sz = SHA512_DIGEST_SIZE;
	req->block_sz = SHA512_BLOCK_SIZE;
	req->hmac = true;

	return 0;
}

static int safexcel_hmac_sha384_digest(struct ahash_request *areq)
{
	int ret = safexcel_hmac_sha384_init(areq);

	if (ret)
		return ret;

	return safexcel_ahash_finup(areq);
}

struct safexcel_alg_template safexcel_alg_hmac_sha384 = {
	.type = SAFEXCEL_ALG_TYPE_AHASH,
	.algo_mask = SAFEXCEL_ALG_SHA2_512,
	.alg.ahash = {
		.init = safexcel_hmac_sha384_init,
		.update = safexcel_ahash_update,
		.final = safexcel_ahash_final,
		.finup = safexcel_ahash_finup,
		.digest = safexcel_hmac_sha384_digest,
		.setkey = safexcel_hmac_sha384_setkey,
		.export = safexcel_ahash_export,
		.import = safexcel_ahash_import,
		.halg = {
			.digestsize = SHA384_DIGEST_SIZE,
			.statesize = sizeof(struct safexcel_ahash_export_state),
			.base = {
				.cra_name = "hmac(sha384)",
				.cra_driver_name = "safexcel-hmac-sha384",
				.cra_priority = SAFEXCEL_CRA_PRIORITY,
				.cra_flags = CRYPTO_ALG_ASYNC |
					     CRYPTO_ALG_KERN_DRIVER_ONLY,
				.cra_blocksize = SHA384_BLOCK_SIZE,
				.cra_ctxsize = sizeof(struct safexcel_ahash_ctx),
				.cra_init = safexcel_ahash_cra_init,
				.cra_exit = safexcel_ahash_cra_exit,
				.cra_module = THIS_MODULE,
			},
		},
	},
};

static int safexcel_md5_init(struct ahash_request *areq)
{
	struct safexcel_ahash_ctx *ctx = crypto_ahash_ctx(crypto_ahash_reqtfm(areq));
	struct safexcel_ahash_req *req = ahash_request_ctx(areq);

	memset(req, 0, sizeof(*req));

	ctx->alg = CONTEXT_CONTROL_CRYPTO_ALG_MD5;
	req->digest = CONTEXT_CONTROL_DIGEST_PRECOMPUTED;
	req->state_sz = MD5_DIGEST_SIZE;
	req->block_sz = MD5_HMAC_BLOCK_SIZE;

	return 0;
}

static int safexcel_md5_digest(struct ahash_request *areq)
{
	int ret = safexcel_md5_init(areq);

	if (ret)
		return ret;

	return safexcel_ahash_finup(areq);
}

struct safexcel_alg_template safexcel_alg_md5 = {
	.type = SAFEXCEL_ALG_TYPE_AHASH,
	.algo_mask = SAFEXCEL_ALG_MD5,
	.alg.ahash = {
		.init = safexcel_md5_init,
		.update = safexcel_ahash_update,
		.final = safexcel_ahash_final,
		.finup = safexcel_ahash_finup,
		.digest = safexcel_md5_digest,
		.export = safexcel_ahash_export,
		.import = safexcel_ahash_import,
		.halg = {
			.digestsize = MD5_DIGEST_SIZE,
			.statesize = sizeof(struct safexcel_ahash_export_state),
			.base = {
				.cra_name = "md5",
				.cra_driver_name = "safexcel-md5",
				.cra_priority = SAFEXCEL_CRA_PRIORITY,
				.cra_flags = CRYPTO_ALG_ASYNC |
					     CRYPTO_ALG_KERN_DRIVER_ONLY,
				.cra_blocksize = MD5_HMAC_BLOCK_SIZE,
				.cra_ctxsize = sizeof(struct safexcel_ahash_ctx),
				.cra_init = safexcel_ahash_cra_init,
				.cra_exit = safexcel_ahash_cra_exit,
				.cra_module = THIS_MODULE,
			},
		},
	},
};

static int safexcel_hmac_md5_init(struct ahash_request *areq)
{
	struct safexcel_ahash_ctx *ctx = crypto_ahash_ctx(crypto_ahash_reqtfm(areq));
	struct safexcel_ahash_req *req = ahash_request_ctx(areq);

	memset(req, 0, sizeof(*req));

	/* Start from ipad precompute */
	memcpy(req->state, ctx->ipad, MD5_DIGEST_SIZE);
	/* Already processed the key^ipad part now! */
	req->len	= MD5_HMAC_BLOCK_SIZE;
	req->processed	= MD5_HMAC_BLOCK_SIZE;

	ctx->alg = CONTEXT_CONTROL_CRYPTO_ALG_MD5;
	req->digest = CONTEXT_CONTROL_DIGEST_PRECOMPUTED;
	req->state_sz = MD5_DIGEST_SIZE;
	req->block_sz = MD5_HMAC_BLOCK_SIZE;
	req->len_is_le = true; /* MD5 is little endian! ... */
	req->hmac = true;

	return 0;
}

static int safexcel_hmac_md5_setkey(struct crypto_ahash *tfm, const u8 *key,
				     unsigned int keylen)
{
	return safexcel_hmac_alg_setkey(tfm, key, keylen, "safexcel-md5",
					MD5_DIGEST_SIZE);
}

static int safexcel_hmac_md5_digest(struct ahash_request *areq)
{
	int ret = safexcel_hmac_md5_init(areq);

	if (ret)
		return ret;

	return safexcel_ahash_finup(areq);
}

struct safexcel_alg_template safexcel_alg_hmac_md5 = {
	.type = SAFEXCEL_ALG_TYPE_AHASH,
	.algo_mask = SAFEXCEL_ALG_MD5,
	.alg.ahash = {
		.init = safexcel_hmac_md5_init,
		.update = safexcel_ahash_update,
		.final = safexcel_ahash_final,
		.finup = safexcel_ahash_finup,
		.digest = safexcel_hmac_md5_digest,
		.setkey = safexcel_hmac_md5_setkey,
		.export = safexcel_ahash_export,
		.import = safexcel_ahash_import,
		.halg = {
			.digestsize = MD5_DIGEST_SIZE,
			.statesize = sizeof(struct safexcel_ahash_export_state),
			.base = {
				.cra_name = "hmac(md5)",
				.cra_driver_name = "safexcel-hmac-md5",
				.cra_priority = SAFEXCEL_CRA_PRIORITY,
				.cra_flags = CRYPTO_ALG_ASYNC |
					     CRYPTO_ALG_KERN_DRIVER_ONLY,
				.cra_blocksize = MD5_HMAC_BLOCK_SIZE,
				.cra_ctxsize = sizeof(struct safexcel_ahash_ctx),
				.cra_init = safexcel_ahash_cra_init,
				.cra_exit = safexcel_ahash_cra_exit,
				.cra_module = THIS_MODULE,
			},
		},
	},
};