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Commit 5588d039 authored by Russell King's avatar Russell King Committed by Herbert Xu
Browse files

crypto: caam - add ahash_edesc_alloc() for descriptor allocation 



Add a helper function to perform the descriptor allocation.

Signed-off-by: default avatarRussell King <rmk+kernel@arm.linux.org.uk>
Signed-off-by: default avatarHerbert Xu <herbert@gondor.apana.org.au>
parent bc13c69e

drivers/crypto/caam/caamhash.c

+33 −27
Original line number Diff line number Diff line
@@ -765,6 +765,25 @@ static void ahash_done_ctx_dst(struct device *jrdev, u32 *desc, u32 err, 
	req->base.complete(&req->base, err);

}



/*

 * Allocate an enhanced descriptor, which contains the hardware descriptor

 * and space for hardware scatter table containing sg_num entries.

 */

static struct ahash_edesc *ahash_edesc_alloc(struct caam_hash_ctx *ctx,

					     int sg_num, gfp_t flags)

{

	struct ahash_edesc *edesc;

	unsigned int sg_size = sg_num * sizeof(struct sec4_sg_entry);



	edesc = kzalloc(sizeof(*edesc) + sg_size, GFP_DMA | flags);

	if (!edesc) {

		dev_err(ctx->jrdev, "could not allocate extended descriptor\n");

		return NULL;

	}



	return edesc;

}



/* submit update job descriptor */

static int ahash_update_ctx(struct ahash_request *req)

{
@@ -818,11 +837,9 @@ static int ahash_update_ctx(struct ahash_request *req) 
		 * allocate space for base edesc and hw desc commands,

		 * link tables

		 */

		edesc = kzalloc(sizeof(*edesc) + sec4_sg_bytes,

				GFP_DMA | flags);

		edesc = ahash_edesc_alloc(ctx, sec4_sg_src_index + mapped_nents,

					  flags);

		if (!edesc) {

			dev_err(jrdev,

				"could not allocate extended descriptor\n");

			dma_unmap_sg(jrdev, req->src, src_nents, DMA_TO_DEVICE);

			return -ENOMEM;

		}
@@ -931,11 +948,9 @@ static int ahash_final_ctx(struct ahash_request *req) 
	sec4_sg_bytes = sec4_sg_src_index * sizeof(struct sec4_sg_entry);



	/* allocate space for base edesc and hw desc commands, link tables */

	edesc = kzalloc(sizeof(*edesc) + sec4_sg_bytes, GFP_DMA | flags);

	if (!edesc) {

		dev_err(jrdev, "could not allocate extended descriptor\n");

	edesc = ahash_edesc_alloc(ctx, sec4_sg_src_index, flags);

	if (!edesc)

		return -ENOMEM;

	}



	sh_len = desc_len(sh_desc);

	desc = edesc->hw_desc;
@@ -1034,9 +1049,9 @@ static int ahash_finup_ctx(struct ahash_request *req) 
			 sizeof(struct sec4_sg_entry);



	/* allocate space for base edesc and hw desc commands, link tables */

	edesc = kzalloc(sizeof(*edesc) + sec4_sg_bytes, GFP_DMA | flags);

	edesc = ahash_edesc_alloc(ctx, sec4_sg_src_index + mapped_nents,

				  flags);

	if (!edesc) {

		dev_err(jrdev, "could not allocate extended descriptor\n");

		dma_unmap_sg(jrdev, req->src, src_nents, DMA_TO_DEVICE);

		return -ENOMEM;

	}
@@ -1136,9 +1151,9 @@ static int ahash_digest(struct ahash_request *req) 
		sec4_sg_bytes = 0;



	/* allocate space for base edesc and hw desc commands, link tables */

	edesc = kzalloc(sizeof(*edesc) + sec4_sg_bytes, GFP_DMA | flags);

	edesc = ahash_edesc_alloc(ctx, mapped_nents > 1 ? mapped_nents : 0,

				  flags);

	if (!edesc) {

		dev_err(jrdev, "could not allocate extended descriptor\n");

		dma_unmap_sg(jrdev, req->src, src_nents, DMA_TO_DEVICE);

		return -ENOMEM;

	}
@@ -1212,13 +1227,10 @@ static int ahash_final_no_ctx(struct ahash_request *req) 
	int sh_len;



	/* allocate space for base edesc and hw desc commands, link tables */

	edesc = kzalloc(sizeof(*edesc), GFP_DMA | flags);

	if (!edesc) {

		dev_err(jrdev, "could not allocate extended descriptor\n");

	edesc = ahash_edesc_alloc(ctx, 0, flags);

	if (!edesc)

		return -ENOMEM;

	}



	edesc->sec4_sg_bytes = 0;

	sh_len = desc_len(sh_desc);

	desc = edesc->hw_desc;

	init_job_desc_shared(desc, ptr, sh_len, HDR_SHARE_DEFER | HDR_REVERSE);
@@ -1310,11 +1322,8 @@ static int ahash_update_no_ctx(struct ahash_request *req) 
		 * allocate space for base edesc and hw desc commands,

		 * link tables

		 */

		edesc = kzalloc(sizeof(*edesc) + sec4_sg_bytes,

				GFP_DMA | flags);

		edesc = ahash_edesc_alloc(ctx, 1 + mapped_nents, flags);

		if (!edesc) {

			dev_err(jrdev,

				"could not allocate extended descriptor\n");

			dma_unmap_sg(jrdev, req->src, src_nents, DMA_TO_DEVICE);

			return -ENOMEM;

		}
@@ -1435,9 +1444,8 @@ static int ahash_finup_no_ctx(struct ahash_request *req) 
			 sizeof(struct sec4_sg_entry);



	/* allocate space for base edesc and hw desc commands, link tables */

	edesc = kzalloc(sizeof(*edesc) + sec4_sg_bytes, GFP_DMA | flags);

	edesc = ahash_edesc_alloc(ctx, sec4_sg_src_index + mapped_nents, flags);

	if (!edesc) {

		dev_err(jrdev, "could not allocate extended descriptor\n");

		dma_unmap_sg(jrdev, req->src, src_nents, DMA_TO_DEVICE);

		return -ENOMEM;

	}
@@ -1546,11 +1554,9 @@ static int ahash_update_first(struct ahash_request *req) 
		 * allocate space for base edesc and hw desc commands,

		 * link tables

		 */

		edesc = kzalloc(sizeof(*edesc) + sec4_sg_bytes,

				GFP_DMA | flags);

		edesc = ahash_edesc_alloc(ctx, mapped_nents > 1 ?

					  mapped_nents : 0, flags);

		if (!edesc) {

			dev_err(jrdev,

				"could not allocate extended descriptor\n");

			dma_unmap_sg(jrdev, req->src, src_nents, DMA_TO_DEVICE);

			return -ENOMEM;

		}