crypto: chelsio -Split Hash requests for large scatter gather list

Send multiple WRs to H/W when No. of entries received in scatter list cannot be sent in single request. Signed-off-by: Harsh Jain <harsh@chelsio.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2018-03-06 10:37:52 +05:30
parent 7ffb911882
commit 5110e65536
4 changed files with 302 additions and 112 deletions
--- a/drivers/crypto/chelsio/chcr_algo.c
+++ b/drivers/crypto/chelsio/chcr_algo.c
@@ -131,6 +131,11 @@ static inline int is_ofld_imm(const struct sk_buff *skb)
 	return (skb->len <= SGE_MAX_WR_LEN);
 }

+static inline void chcr_init_hctx_per_wr(struct chcr_ahash_req_ctx *reqctx)
+{
+	memset(&reqctx->hctx_wr, 0, sizeof(struct chcr_hctx_per_wr));
+}
+
 static int sg_nents_xlen(struct scatterlist *sg, unsigned int reqlen,
 			 unsigned int entlen,
 			 unsigned int skip)
@@ -165,6 +170,7 @@ static inline void chcr_handle_ahash_resp(struct ahash_request *req,
 					  int err)
 {
 	struct chcr_ahash_req_ctx *reqctx = ahash_request_ctx(req);
+	struct chcr_hctx_per_wr *hctx_wr = &reqctx->hctx_wr;
 	int digestsize, updated_digestsize;
 	struct crypto_ahash *tfm = crypto_ahash_reqtfm(req);
 	struct uld_ctx *u_ctx = ULD_CTX(h_ctx(tfm));
@@ -172,25 +178,43 @@ static inline void chcr_handle_ahash_resp(struct ahash_request *req,
 	if (input == NULL)
 		goto out;
 	digestsize = crypto_ahash_digestsize(crypto_ahash_reqtfm(req));
-	if (reqctx->is_sg_map)
-		chcr_hash_dma_unmap(&u_ctx->lldi.pdev->dev, req);
-	if (reqctx->dma_addr)
-		dma_unmap_single(&u_ctx->lldi.pdev->dev, reqctx->dma_addr,
-				 reqctx->dma_len, DMA_TO_DEVICE);
-	reqctx->dma_addr = 0;
 	updated_digestsize = digestsize;
 	if (digestsize == SHA224_DIGEST_SIZE)
 		updated_digestsize = SHA256_DIGEST_SIZE;
 	else if (digestsize == SHA384_DIGEST_SIZE)
 		updated_digestsize = SHA512_DIGEST_SIZE;
-	if (reqctx->result == 1) {
-		reqctx->result = 0;
-		memcpy(req->result, input + sizeof(struct cpl_fw6_pld),
-		       digestsize);
-	} else {
-		memcpy(reqctx->partial_hash, input + sizeof(struct cpl_fw6_pld),
-		       updated_digestsize);
+
+	if (hctx_wr->dma_addr) {
+		dma_unmap_single(&u_ctx->lldi.pdev->dev, hctx_wr->dma_addr,
+				 hctx_wr->dma_len, DMA_TO_DEVICE);
+		hctx_wr->dma_addr = 0;
 	}
+	if (hctx_wr->isfinal || ((hctx_wr->processed + reqctx->reqlen) ==
+				 req->nbytes)) {
+		if (hctx_wr->result == 1) {
+			hctx_wr->result = 0;
+			memcpy(req->result, input + sizeof(struct cpl_fw6_pld),
+			       digestsize);
+		} else {
+			memcpy(reqctx->partial_hash,
+			       input + sizeof(struct cpl_fw6_pld),
+			       updated_digestsize);
+
+		}
+		goto unmap;
+	}
+	memcpy(reqctx->partial_hash, input + sizeof(struct cpl_fw6_pld),
+	       updated_digestsize);
+
+	err = chcr_ahash_continue(req);
+	if (err)
+		goto unmap;
+	return;
+unmap:
+	if (hctx_wr->is_sg_map)
+		chcr_hash_dma_unmap(&u_ctx->lldi.pdev->dev, req);
+
+
 out:
 	req->base.complete(&req->base, err);
 }
@@ -563,7 +587,6 @@ static void  ulptx_walk_add_sg(struct ulptx_walk *walk,

 	if (!len)
 		return;
-
 	while (sg && skip) {
 		if (sg_dma_len(sg) <= skip) {
 			skip -= sg_dma_len(sg);
@@ -653,6 +676,35 @@ static int generate_copy_rrkey(struct ablk_ctx *ablkctx,
 	}
 	return 0;
 }
+
+static int chcr_hash_ent_in_wr(struct scatterlist *src,
+			     unsigned int minsg,
+			     unsigned int space,
+			     unsigned int srcskip)
+{
+	int srclen = 0;
+	int srcsg = minsg;
+	int soffset = 0, sless;
+
+	if (sg_dma_len(src) == srcskip) {
+		src = sg_next(src);
+		srcskip = 0;
+	}
+	while (src && space > (sgl_ent_len[srcsg + 1])) {
+		sless = min_t(unsigned int, sg_dma_len(src) - soffset -	srcskip,
+							CHCR_SRC_SG_SIZE);
+		srclen += sless;
+		soffset += sless;
+		srcsg++;
+		if (sg_dma_len(src) == (soffset + srcskip)) {
+			src = sg_next(src);
+			soffset = 0;
+			srcskip = 0;
+		}
+	}
+	return srclen;
+}
+
 static int chcr_sg_ent_in_wr(struct scatterlist *src,
 			     struct scatterlist *dst,
 			     unsigned int minsg,
@@ -1153,7 +1205,7 @@ static int chcr_handle_cipher_resp(struct ablkcipher_request *req,
 	}
 	if (!reqctx->imm) {
 		bytes = chcr_sg_ent_in_wr(reqctx->srcsg, reqctx->dstsg, 1,
-					  SPACE_LEFT(ablkctx->enckey_len),
+					  CIP_SPACE_LEFT(ablkctx->enckey_len),
 					  reqctx->src_ofst, reqctx->dst_ofst);
 		if ((bytes + reqctx->processed) >= req->nbytes)
 			bytes  = req->nbytes - reqctx->processed;
@@ -1257,7 +1309,7 @@ static int process_cipher(struct ablkcipher_request *req,
 	if (!reqctx->imm) {
 		bytes = chcr_sg_ent_in_wr(req->src, req->dst,
 					  MIN_CIPHER_SG,
-					  SPACE_LEFT(ablkctx->enckey_len),
+					  CIP_SPACE_LEFT(ablkctx->enckey_len),
 					  0, 0);
 		if ((bytes + reqctx->processed) >= req->nbytes)
 			bytes  = req->nbytes - reqctx->processed;
@@ -1513,35 +1565,24 @@ static struct sk_buff *create_hash_wr(struct ahash_request *req,
 	struct uld_ctx *u_ctx = ULD_CTX(h_ctx(tfm));
 	struct chcr_wr *chcr_req;
 	struct ulptx_sgl *ulptx;
-	unsigned int nents = 0, transhdr_len, iopad_alignment = 0;
-	unsigned int digestsize = crypto_ahash_digestsize(tfm);
-	unsigned int kctx_len = 0, temp = 0;
-	u8 hash_size_in_response = 0;
+	unsigned int nents = 0, transhdr_len;
+	unsigned int temp = 0;
 	gfp_t flags = req->base.flags & CRYPTO_TFM_REQ_MAY_SLEEP ? GFP_KERNEL :
 		GFP_ATOMIC;
 	struct adapter *adap = padap(h_ctx(tfm)->dev);
 	int error = 0;

-	iopad_alignment = KEYCTX_ALIGN_PAD(digestsize);
-	kctx_len = param->alg_prm.result_size + iopad_alignment;
-	if (param->opad_needed)
-		kctx_len += param->alg_prm.result_size + iopad_alignment;
-
-	if (req_ctx->result)
-		hash_size_in_response = digestsize;
-	else
-		hash_size_in_response = param->alg_prm.result_size;
-	transhdr_len = HASH_TRANSHDR_SIZE(kctx_len);
-	req_ctx->imm = (transhdr_len + param->bfr_len + param->sg_len) <=
-		SGE_MAX_WR_LEN;
-	nents = sg_nents_xlen(req->src, param->sg_len, CHCR_SRC_SG_SIZE, 0);
+	transhdr_len = HASH_TRANSHDR_SIZE(param->kctx_len);
+	req_ctx->hctx_wr.imm = (transhdr_len + param->bfr_len +
+				param->sg_len) <= SGE_MAX_WR_LEN;
+	nents = sg_nents_xlen(req_ctx->hctx_wr.srcsg, param->sg_len,
+		      CHCR_SRC_SG_SIZE, req_ctx->hctx_wr.src_ofst);
 	nents += param->bfr_len ? 1 : 0;
-	transhdr_len += req_ctx->imm ? roundup((param->bfr_len +
-			param->sg_len), 16) :
-			(sgl_len(nents) * 8);
+	transhdr_len += req_ctx->hctx_wr.imm ? roundup(param->bfr_len +
+				param->sg_len, 16) : (sgl_len(nents) * 8);
 	transhdr_len = roundup(transhdr_len, 16);

-	skb = alloc_skb(SGE_MAX_WR_LEN, flags);
+	skb = alloc_skb(transhdr_len, flags);
 	if (!skb)
 		return ERR_PTR(-ENOMEM);
 	chcr_req = __skb_put_zero(skb, transhdr_len);
@@ -1573,33 +1614,33 @@ static struct sk_buff *create_hash_wr(struct ahash_request *req,
 	chcr_req->key_ctx.ctx_hdr = FILL_KEY_CTX_HDR(CHCR_KEYCTX_NO_KEY,
 					    param->alg_prm.mk_size, 0,
 					    param->opad_needed,
-					    ((kctx_len +
+					    ((param->kctx_len +
 					     sizeof(chcr_req->key_ctx)) >> 4));
 	chcr_req->sec_cpl.scmd1 = cpu_to_be64((u64)param->scmd1);
-	ulptx = (struct ulptx_sgl *)((u8 *)(chcr_req + 1) + kctx_len +
+	ulptx = (struct ulptx_sgl *)((u8 *)(chcr_req + 1) + param->kctx_len +
 				     DUMMY_BYTES);
 	if (param->bfr_len != 0) {
-		req_ctx->dma_addr = dma_map_single(&u_ctx->lldi.pdev->dev,
-					  req_ctx->reqbfr, param->bfr_len,
-					  DMA_TO_DEVICE);
+		req_ctx->hctx_wr.dma_addr =
+			dma_map_single(&u_ctx->lldi.pdev->dev, req_ctx->reqbfr,
+				       param->bfr_len, DMA_TO_DEVICE);
 		if (dma_mapping_error(&u_ctx->lldi.pdev->dev,
-				       req_ctx->dma_addr)) {
+				       req_ctx->hctx_wr. dma_addr)) {
 			error = -ENOMEM;
 			goto err;
 		}
-		req_ctx->dma_len = param->bfr_len;
+		req_ctx->hctx_wr.dma_len = param->bfr_len;
 	} else {
-		req_ctx->dma_addr = 0;
+		req_ctx->hctx_wr.dma_addr = 0;
 	}
 	chcr_add_hash_src_ent(req, ulptx, param);
 	/* Request upto max wr size */
-	temp = kctx_len + DUMMY_BYTES + (req_ctx->imm ? (param->sg_len
-					+ param->bfr_len) : 0);
+	temp = param->kctx_len + DUMMY_BYTES + (req_ctx->hctx_wr.imm ?
+				(param->sg_len + param->bfr_len) : 0);
 	atomic_inc(&adap->chcr_stats.digest_rqst);
-	create_wreq(h_ctx(tfm), chcr_req, &req->base, req_ctx->imm,
-		    hash_size_in_response, transhdr_len,
+	create_wreq(h_ctx(tfm), chcr_req, &req->base, req_ctx->hctx_wr.imm,
+		    param->hash_size, transhdr_len,
 		    temp,  0);
-	req_ctx->skb = skb;
+	req_ctx->hctx_wr.skb = skb;
 	return skb;
 err:
 	kfree_skb(skb);
@@ -1618,7 +1659,6 @@ static int chcr_ahash_update(struct ahash_request *req)
 	int error;

 	bs = crypto_tfm_alg_blocksize(crypto_ahash_tfm(rtfm));
-
 	u_ctx = ULD_CTX(h_ctx(rtfm));
 	if (unlikely(cxgb4_is_crypto_q_full(u_ctx->lldi.ports[0],
 					    h_ctx(rtfm)->tx_qidx))) {
@@ -1635,17 +1675,26 @@ static int chcr_ahash_update(struct ahash_request *req)
 		req_ctx->reqlen += nbytes;
 		return 0;
 	}
+	chcr_init_hctx_per_wr(req_ctx);
 	error = chcr_hash_dma_map(&u_ctx->lldi.pdev->dev, req);
 	if (error)
 		return -ENOMEM;
+	get_alg_config(&params.alg_prm, crypto_ahash_digestsize(rtfm));
+	params.kctx_len = roundup(params.alg_prm.result_size, 16);
+	params.sg_len = chcr_hash_ent_in_wr(req->src, !!req_ctx->reqlen,
+				     HASH_SPACE_LEFT(params.kctx_len), 0);
+	if (params.sg_len > req->nbytes)
+		params.sg_len = req->nbytes;
+	params.sg_len = rounddown(params.sg_len + req_ctx->reqlen, bs) -
+			req_ctx->reqlen;
 	params.opad_needed = 0;
 	params.more = 1;
 	params.last = 0;
-	params.sg_len = nbytes - req_ctx->reqlen;
 	params.bfr_len = req_ctx->reqlen;
 	params.scmd1 = 0;
-	get_alg_config(&params.alg_prm, crypto_ahash_digestsize(rtfm));
-	req_ctx->result = 0;
+	req_ctx->hctx_wr.srcsg = req->src;
+
+	params.hash_size = params.alg_prm.result_size;
 	req_ctx->data_len += params.sg_len + params.bfr_len;
 	skb = create_hash_wr(req, &params);
 	if (IS_ERR(skb)) {
@@ -1653,6 +1702,7 @@ static int chcr_ahash_update(struct ahash_request *req)
 		goto unmap;
 	}

+	req_ctx->hctx_wr.processed += params.sg_len;
 	if (remainder) {
 		/* Swap buffers */
 		swap(req_ctx->reqbfr, req_ctx->skbfr);
@@ -1690,16 +1740,27 @@ static int chcr_ahash_final(struct ahash_request *req)
 	struct uld_ctx *u_ctx = NULL;
 	u8 bs = crypto_tfm_alg_blocksize(crypto_ahash_tfm(rtfm));

+	chcr_init_hctx_per_wr(req_ctx);
 	u_ctx = ULD_CTX(h_ctx(rtfm));
 	if (is_hmac(crypto_ahash_tfm(rtfm)))
 		params.opad_needed = 1;
 	else
 		params.opad_needed = 0;
 	params.sg_len = 0;
+	req_ctx->hctx_wr.isfinal = 1;
 	get_alg_config(&params.alg_prm, crypto_ahash_digestsize(rtfm));
-	req_ctx->result = 1;
+	params.kctx_len = roundup(params.alg_prm.result_size, 16);
+	if (is_hmac(crypto_ahash_tfm(rtfm))) {
+		params.opad_needed = 1;
+		params.kctx_len *= 2;
+	} else {
+		params.opad_needed = 0;
+	}
+
+	req_ctx->hctx_wr.result = 1;
 	params.bfr_len = req_ctx->reqlen;
 	req_ctx->data_len += params.bfr_len + params.sg_len;
+	req_ctx->hctx_wr.srcsg = req->src;
 	if (req_ctx->reqlen == 0) {
 		create_last_hash_block(req_ctx->reqbfr, bs, req_ctx->data_len);
 		params.last = 0;
@@ -1712,16 +1773,81 @@ static int chcr_ahash_final(struct ahash_request *req)
 		params.last = 1;
 		params.more = 0;
 	}
+	params.hash_size = crypto_ahash_digestsize(rtfm);
 	skb = create_hash_wr(req, &params);
 	if (IS_ERR(skb))
 		return PTR_ERR(skb);
-
+	req_ctx->reqlen = 0;
 	skb->dev = u_ctx->lldi.ports[0];
 	set_wr_txq(skb, CPL_PRIORITY_DATA, h_ctx(rtfm)->tx_qidx);
 	chcr_send_wr(skb);
 	return -EINPROGRESS;
 }

+static int chcr_ahash_continue(struct ahash_request *req)
+{
+	struct chcr_ahash_req_ctx *reqctx = ahash_request_ctx(req);
+	struct chcr_hctx_per_wr *hctx_wr = &reqctx->hctx_wr;
+	struct crypto_ahash *rtfm = crypto_ahash_reqtfm(req);
+	struct uld_ctx *u_ctx = NULL;
+	struct sk_buff *skb;
+	struct hash_wr_param params;
+	u8  bs;
+	int error;
+
+	bs = crypto_tfm_alg_blocksize(crypto_ahash_tfm(rtfm));
+	u_ctx = ULD_CTX(h_ctx(rtfm));
+	if (unlikely(cxgb4_is_crypto_q_full(u_ctx->lldi.ports[0],
+					    h_ctx(rtfm)->tx_qidx))) {
+		if (!(req->base.flags & CRYPTO_TFM_REQ_MAY_BACKLOG))
+			return -EBUSY;
+	}
+	get_alg_config(&params.alg_prm, crypto_ahash_digestsize(rtfm));
+	params.kctx_len = roundup(params.alg_prm.result_size, 16);
+	if (is_hmac(crypto_ahash_tfm(rtfm))) {
+		params.kctx_len *= 2;
+		params.opad_needed = 1;
+	} else {
+		params.opad_needed = 0;
+	}
+	params.sg_len = chcr_hash_ent_in_wr(hctx_wr->srcsg, 0,
+					    HASH_SPACE_LEFT(params.kctx_len),
+					    hctx_wr->src_ofst);
+	if ((params.sg_len + hctx_wr->processed) > req->nbytes)
+		params.sg_len = req->nbytes - hctx_wr->processed;
+	if (!hctx_wr->result ||
+	    ((params.sg_len + hctx_wr->processed) < req->nbytes)) {
+		if (is_hmac(crypto_ahash_tfm(rtfm))) {
+			params.kctx_len /= 2;
+			params.opad_needed = 0;
+		}
+		params.last = 0;
+		params.more = 1;
+		params.sg_len = rounddown(params.sg_len, bs);
+		params.hash_size = params.alg_prm.result_size;
+		params.scmd1 = 0;
+	} else {
+		params.last = 1;
+		params.more = 0;
+		params.hash_size = crypto_ahash_digestsize(rtfm);
+		params.scmd1 = reqctx->data_len + params.sg_len;
+	}
+	params.bfr_len = 0;
+	reqctx->data_len += params.sg_len;
+	skb = create_hash_wr(req, &params);
+	if (IS_ERR(skb)) {
+		error = PTR_ERR(skb);
+		goto err;
+	}
+	hctx_wr->processed += params.sg_len;
+	skb->dev = u_ctx->lldi.ports[0];
+	set_wr_txq(skb, CPL_PRIORITY_DATA, h_ctx(rtfm)->tx_qidx);
+	chcr_send_wr(skb);
+	return 0;
+err:
+	return error;
+}
+
 static int chcr_ahash_finup(struct ahash_request *req)
 {
 	struct chcr_ahash_req_ctx *req_ctx = ahash_request_ctx(req);
@@ -1740,37 +1866,59 @@ static int chcr_ahash_finup(struct ahash_request *req)
 		if (!(req->base.flags & CRYPTO_TFM_REQ_MAY_BACKLOG))
 			return -EBUSY;
 	}
+	chcr_init_hctx_per_wr(req_ctx);
+	error = chcr_hash_dma_map(&u_ctx->lldi.pdev->dev, req);
+	if (error)
+		return -ENOMEM;

-	if (is_hmac(crypto_ahash_tfm(rtfm)))
-		params.opad_needed = 1;
-	else
-		params.opad_needed = 0;
-
-	params.sg_len = req->nbytes;
-	params.bfr_len = req_ctx->reqlen;
 	get_alg_config(&params.alg_prm, crypto_ahash_digestsize(rtfm));
+	params.kctx_len = roundup(params.alg_prm.result_size, 16);
+	if (is_hmac(crypto_ahash_tfm(rtfm))) {
+		params.kctx_len *= 2;
+		params.opad_needed = 1;
+	} else {
+		params.opad_needed = 0;
+	}
+
+	params.sg_len = chcr_hash_ent_in_wr(req->src, !!req_ctx->reqlen,
+				    HASH_SPACE_LEFT(params.kctx_len), 0);
+	if (params.sg_len < req->nbytes) {
+		if (is_hmac(crypto_ahash_tfm(rtfm))) {
+			params.kctx_len /= 2;
+			params.opad_needed = 0;
+		}
+		params.last = 0;
+		params.more = 1;
+		params.sg_len = rounddown(params.sg_len + req_ctx->reqlen, bs)
+					- req_ctx->reqlen;
+		params.hash_size = params.alg_prm.result_size;
+		params.scmd1 = 0;
+	} else {
+		params.last = 1;
+		params.more = 0;
+		params.sg_len = req->nbytes;
+		params.hash_size = crypto_ahash_digestsize(rtfm);
+		params.scmd1 = req_ctx->data_len + req_ctx->reqlen +
+				params.sg_len;
+	}
+	params.bfr_len = req_ctx->reqlen;
 	req_ctx->data_len += params.bfr_len + params.sg_len;
-	req_ctx->result = 1;
+	req_ctx->hctx_wr.result = 1;
+	req_ctx->hctx_wr.srcsg = req->src;
 	if ((req_ctx->reqlen + req->nbytes) == 0) {
 		create_last_hash_block(req_ctx->reqbfr, bs, req_ctx->data_len);
 		params.last = 0;
 		params.more = 1;
 		params.scmd1 = 0;
 		params.bfr_len = bs;
-	} else {
-		params.scmd1 = req_ctx->data_len;
-		params.last = 1;
-		params.more = 0;
 	}
-	error = chcr_hash_dma_map(&u_ctx->lldi.pdev->dev, req);
-	if (error)
-		return -ENOMEM;
-
 	skb = create_hash_wr(req, &params);
 	if (IS_ERR(skb)) {
 		error = PTR_ERR(skb);
 		goto unmap;
 	}
+	req_ctx->reqlen = 0;
+	req_ctx->hctx_wr.processed += params.sg_len;
 	skb->dev = u_ctx->lldi.ports[0];
 	set_wr_txq(skb, CPL_PRIORITY_DATA, h_ctx(rtfm)->tx_qidx);
 	chcr_send_wr(skb);
@@ -1801,21 +1949,42 @@ static int chcr_ahash_digest(struct ahash_request *req)
 			return -EBUSY;
 	}

-	if (is_hmac(crypto_ahash_tfm(rtfm)))
-		params.opad_needed = 1;
-	else
-		params.opad_needed = 0;
+	chcr_init_hctx_per_wr(req_ctx);
 	error = chcr_hash_dma_map(&u_ctx->lldi.pdev->dev, req);
 	if (error)
 		return -ENOMEM;

-	params.last = 0;
-	params.more = 0;
-	params.sg_len = req->nbytes;
-	params.bfr_len = 0;
-	params.scmd1 = 0;
 	get_alg_config(&params.alg_prm, crypto_ahash_digestsize(rtfm));
-	req_ctx->result = 1;
+	params.kctx_len = roundup(params.alg_prm.result_size, 16);
+	if (is_hmac(crypto_ahash_tfm(rtfm))) {
+		params.kctx_len *= 2;
+		params.opad_needed = 1;
+	} else {
+		params.opad_needed = 0;
+	}
+	params.sg_len = chcr_hash_ent_in_wr(req->src, !!req_ctx->reqlen,
+				HASH_SPACE_LEFT(params.kctx_len), 0);
+	if (params.sg_len < req->nbytes) {
+		if (is_hmac(crypto_ahash_tfm(rtfm))) {
+			params.kctx_len /= 2;
+			params.opad_needed = 0;
+		}
+		params.last = 0;
+		params.more = 1;
+		params.scmd1 = 0;
+		params.sg_len = rounddown(params.sg_len, bs);
+		params.hash_size = params.alg_prm.result_size;
+	} else {
+		params.sg_len = req->nbytes;
+		params.hash_size = crypto_ahash_digestsize(rtfm);
+		params.last = 1;
+		params.more = 0;
+		params.scmd1 = req->nbytes + req_ctx->data_len;
+
+	}
+	params.bfr_len = 0;
+	req_ctx->hctx_wr.result = 1;
+	req_ctx->hctx_wr.srcsg = req->src;
 	req_ctx->data_len += params.bfr_len + params.sg_len;

 	if (req->nbytes == 0) {
@@ -1829,6 +1998,7 @@ static int chcr_ahash_digest(struct ahash_request *req)
 		error = PTR_ERR(skb);
 		goto unmap;
 	}
+	req_ctx->hctx_wr.processed += params.sg_len;
 	skb->dev = u_ctx->lldi.ports[0];
 	set_wr_txq(skb, CPL_PRIORITY_DATA, h_ctx(rtfm)->tx_qidx);
 	chcr_send_wr(skb);
@@ -1845,11 +2015,10 @@ static int chcr_ahash_export(struct ahash_request *areq, void *out)

 	state->reqlen = req_ctx->reqlen;
 	state->data_len = req_ctx->data_len;
-	state->is_sg_map = 0;
-	state->result = 0;
 	memcpy(state->bfr1, req_ctx->reqbfr, req_ctx->reqlen);
 	memcpy(state->partial_hash, req_ctx->partial_hash,
 	       CHCR_HASH_MAX_DIGEST_SIZE);
+	chcr_init_hctx_per_wr(state);
 		return 0;
 }

@@ -1862,11 +2031,10 @@ static int chcr_ahash_import(struct ahash_request *areq, const void *in)
 	req_ctx->data_len = state->data_len;
 	req_ctx->reqbfr = req_ctx->bfr1;
 	req_ctx->skbfr = req_ctx->bfr2;
-	req_ctx->is_sg_map = 0;
-	req_ctx->result = 0;
 	memcpy(req_ctx->bfr1, state->bfr1, CHCR_HASH_MAX_BLOCK_SIZE_128);
 	memcpy(req_ctx->partial_hash, state->partial_hash,
 	       CHCR_HASH_MAX_DIGEST_SIZE);
+	chcr_init_hctx_per_wr(req_ctx);
 	return 0;
 }

@@ -1963,10 +2131,8 @@ static int chcr_sha_init(struct ahash_request *areq)
 	req_ctx->reqlen = 0;
 	req_ctx->reqbfr = req_ctx->bfr1;
 	req_ctx->skbfr = req_ctx->bfr2;
-	req_ctx->skb = NULL;
-	req_ctx->result = 0;
-	req_ctx->is_sg_map = 0;
 	copy_hash_init_values(req_ctx->partial_hash, digestsize);
+
 	return 0;
 }

@@ -2407,22 +2573,26 @@ void chcr_add_hash_src_ent(struct ahash_request *req,
 	struct ulptx_walk ulp_walk;
 	struct chcr_ahash_req_ctx *reqctx = ahash_request_ctx(req);

-	if (reqctx->imm) {
+	if (reqctx->hctx_wr.imm) {
 		u8 *buf = (u8 *)ulptx;

 		if (param->bfr_len) {
 			memcpy(buf, reqctx->reqbfr, param->bfr_len);
 			buf += param->bfr_len;
 		}
-		sg_pcopy_to_buffer(req->src, sg_nents(req->src),
-				   buf, param->sg_len, 0);
+
+		sg_pcopy_to_buffer(reqctx->hctx_wr.srcsg,
+				   sg_nents(reqctx->hctx_wr.srcsg), buf,
+				   param->sg_len, 0);
 	} else {
 		ulptx_walk_init(&ulp_walk, ulptx);
 		if (param->bfr_len)
 			ulptx_walk_add_page(&ulp_walk, param->bfr_len,
-					    &reqctx->dma_addr);
-		ulptx_walk_add_sg(&ulp_walk, req->src, param->sg_len,
-				  0);
+					    &reqctx->hctx_wr.dma_addr);
+		ulptx_walk_add_sg(&ulp_walk, reqctx->hctx_wr.srcsg,
+				  param->sg_len, reqctx->hctx_wr.src_ofst);
+		reqctx->hctx_wr.srcsg = ulp_walk.last_sg;
+		reqctx->hctx_wr.src_ofst = ulp_walk.last_sg_len;
 		ulptx_walk_end(&ulp_walk);
 	}
 }
@@ -2439,7 +2609,7 @@ int chcr_hash_dma_map(struct device *dev,
 			   DMA_TO_DEVICE);
 	if (!error)
 		return -ENOMEM;
-	req_ctx->is_sg_map = 1;
+	req_ctx->hctx_wr.is_sg_map = 1;
 	return 0;
 }

@@ -2453,7 +2623,7 @@ void chcr_hash_dma_unmap(struct device *dev,

 	dma_unmap_sg(dev, req->src, sg_nents(req->src),
 			   DMA_TO_DEVICE);
-	req_ctx->is_sg_map = 0;
+	req_ctx->hctx_wr.is_sg_map = 0;

 }

--- a/drivers/crypto/chelsio/chcr_algo.h
+++ b/drivers/crypto/chelsio/chcr_algo.h
@@ -222,8 +222,10 @@
 #define MIN_GCM_SG			1 /* IV */
 #define MIN_DIGEST_SG			1 /*Partial Buffer*/
 #define MIN_CCM_SG			2 /*IV+B0*/
-#define SPACE_LEFT(len) \
-	((SGE_MAX_WR_LEN - WR_MIN_LEN - (len)))
+#define CIP_SPACE_LEFT(len) \
+	((SGE_MAX_WR_LEN - CIP_WR_MIN_LEN - (len)))
+#define HASH_SPACE_LEFT(len) \
+	((SGE_MAX_WR_LEN - HASH_WR_MIN_LEN - (len)))

 struct algo_param {
 	unsigned int auth_mode;
@@ -232,12 +234,14 @@ struct algo_param {
 };

 struct hash_wr_param {
+	struct algo_param alg_prm;
 	unsigned int opad_needed;
 	unsigned int more;
 	unsigned int last;
-	struct algo_param alg_prm;
+	unsigned int kctx_len;
 	unsigned int sg_len;
 	unsigned int bfr_len;
+	unsigned int hash_size;
 	u64 scmd1;
 };

--- a/drivers/crypto/chelsio/chcr_core.h
+++ b/drivers/crypto/chelsio/chcr_core.h
@@ -54,10 +54,14 @@
 #define MAC_ERROR_BIT		0
 #define CHK_MAC_ERR_BIT(x)	(((x) >> MAC_ERROR_BIT) & 1)
 #define MAX_SALT                4
-#define WR_MIN_LEN (sizeof(struct chcr_wr) + \
+#define CIP_WR_MIN_LEN (sizeof(struct chcr_wr) + \
 		    sizeof(struct cpl_rx_phys_dsgl) + \
 		    sizeof(struct ulptx_sgl))

+#define HASH_WR_MIN_LEN (sizeof(struct chcr_wr) + \
+			DUMMY_BYTES + \
+		    sizeof(struct ulptx_sgl))
+
 #define padap(dev) pci_get_drvdata(dev->u_ctx->lldi.pdev)

 struct uld_ctx;
--- a/drivers/crypto/chelsio/chcr_crypto.h
+++ b/drivers/crypto/chelsio/chcr_crypto.h
@@ -258,21 +258,32 @@ struct chcr_context {
 	struct __crypto_ctx crypto_ctx[0];
 };

-struct chcr_ahash_req_ctx {
-	u32 result;
-	u8 bfr1[CHCR_HASH_MAX_BLOCK_SIZE_128];
-	u8 bfr2[CHCR_HASH_MAX_BLOCK_SIZE_128];
-	u8 *reqbfr;
-	u8 *skbfr;
+struct chcr_hctx_per_wr {
+	struct scatterlist *srcsg;
+	struct sk_buff *skb;
 	dma_addr_t dma_addr;
 	u32 dma_len;
-	u8 reqlen;
-	u8 imm;
+	unsigned int src_ofst;
+	unsigned int processed;
+	u32 result;
 	u8 is_sg_map;
-	u8 partial_hash[CHCR_HASH_MAX_DIGEST_SIZE];
-	u64 data_len;  /* Data len till time */
+	u8 imm;
+	/*Final callback called. Driver cannot rely on nbytes to decide
+	 * final call
+	 */
+	u8 isfinal;
+};
+
+struct chcr_ahash_req_ctx {
+	struct chcr_hctx_per_wr hctx_wr;
+	u8 *reqbfr;
+	u8 *skbfr;
 	/* SKB which is being sent to the hardware for processing */
-	struct sk_buff *skb;
+	u64 data_len;  /* Data len till time */
+	u8 reqlen;
+	u8 partial_hash[CHCR_HASH_MAX_DIGEST_SIZE];
+	u8 bfr1[CHCR_HASH_MAX_BLOCK_SIZE_128];
+	u8 bfr2[CHCR_HASH_MAX_BLOCK_SIZE_128];
 };

 struct chcr_blkcipher_req_ctx {
@@ -329,4 +340,5 @@ void chcr_add_hash_src_ent(struct ahash_request *req, struct ulptx_sgl *ulptx,
 			   struct hash_wr_param *param);
 int chcr_hash_dma_map(struct device *dev, struct ahash_request *req);
 void chcr_hash_dma_unmap(struct device *dev, struct ahash_request *req);
+static int chcr_ahash_continue(struct ahash_request *req);
 #endif /* __CHCR_CRYPTO_H__ */