Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit fea40451 authored by LABBE Corentin's avatar LABBE Corentin Committed by Herbert Xu
Browse files

crypto: qce - dma_map_sg can handle chained SG 



The qce driver use two dma_map_sg path according to SG are chained
or not.
Since dma_map_sg can handle both case, clean the code with all
references to sg chained.

Thus removing qce_mapsg, qce_unmapsg and qce_countsg functions.

Signed-off-by: default avatarLABBE Corentin <clabbe.montjoie@gmail.com>
Signed-off-by: default avatarHerbert Xu <herbert@gondor.apana.org.au>
parent 166db195

drivers/crypto/qce/ablkcipher.c

+10 −20
Original line number Diff line number Diff line
@@ -44,10 +44,8 @@ static void qce_ablkcipher_done(void *data) 
			error);



	if (diff_dst)

		qce_unmapsg(qce->dev, rctx->src_sg, rctx->src_nents, dir_src,

			    rctx->dst_chained);

	qce_unmapsg(qce->dev, rctx->dst_sg, rctx->dst_nents, dir_dst,

		    rctx->dst_chained);

		dma_unmap_sg(qce->dev, rctx->src_sg, rctx->src_nents, dir_src);

	dma_unmap_sg(qce->dev, rctx->dst_sg, rctx->dst_nents, dir_dst);



	sg_free_table(&rctx->dst_tbl);
@@ -80,15 +78,11 @@ qce_ablkcipher_async_req_handle(struct crypto_async_request *async_req) 
	dir_src = diff_dst ? DMA_TO_DEVICE : DMA_BIDIRECTIONAL;

	dir_dst = diff_dst ? DMA_FROM_DEVICE : DMA_BIDIRECTIONAL;



	rctx->src_nents = qce_countsg(req->src, req->nbytes,

				      &rctx->src_chained);

	if (diff_dst) {

		rctx->dst_nents = qce_countsg(req->dst, req->nbytes,

					      &rctx->dst_chained);

	} else {

	rctx->src_nents = sg_nents_for_len(req->src, req->nbytes);

	if (diff_dst)

		rctx->dst_nents = sg_nents_for_len(req->dst, req->nbytes);

	else

		rctx->dst_nents = rctx->src_nents;

		rctx->dst_chained = rctx->src_chained;

	}



	rctx->dst_nents += 1;
@@ -116,14 +110,12 @@ qce_ablkcipher_async_req_handle(struct crypto_async_request *async_req) 
	sg_mark_end(sg);

	rctx->dst_sg = rctx->dst_tbl.sgl;



	ret = qce_mapsg(qce->dev, rctx->dst_sg, rctx->dst_nents, dir_dst,

			rctx->dst_chained);

	ret = dma_map_sg(qce->dev, rctx->dst_sg, rctx->dst_nents, dir_dst);

	if (ret < 0)

		goto error_free;



	if (diff_dst) {

		ret = qce_mapsg(qce->dev, req->src, rctx->src_nents, dir_src,

				rctx->src_chained);

		ret = dma_map_sg(qce->dev, req->src, rctx->src_nents, dir_src);

		if (ret < 0)

			goto error_unmap_dst;

		rctx->src_sg = req->src;
@@ -149,11 +141,9 @@ qce_ablkcipher_async_req_handle(struct crypto_async_request *async_req) 
	qce_dma_terminate_all(&qce->dma);

error_unmap_src:

	if (diff_dst)

		qce_unmapsg(qce->dev, req->src, rctx->src_nents, dir_src,

			    rctx->src_chained);

		dma_unmap_sg(qce->dev, req->src, rctx->src_nents, dir_src);

error_unmap_dst:

	qce_unmapsg(qce->dev, rctx->dst_sg, rctx->dst_nents, dir_dst,

		    rctx->dst_chained);

	dma_unmap_sg(qce->dev, rctx->dst_sg, rctx->dst_nents, dir_dst);

error_free:

	sg_free_table(&rctx->dst_tbl);

	return ret;

drivers/crypto/qce/cipher.h

+0 −4
Original line number Diff line number Diff line
@@ -32,8 +32,6 @@ struct qce_cipher_ctx { 
 * @ivsize: IV size

 * @src_nents: source entries

 * @dst_nents: destination entries

 * @src_chained: is source chained

 * @dst_chained: is destination chained

 * @result_sg: scatterlist used for result buffer

 * @dst_tbl: destination sg table

 * @dst_sg: destination sg pointer table beginning
@@ -47,8 +45,6 @@ struct qce_cipher_reqctx { 
	unsigned int ivsize;

	int src_nents;

	int dst_nents;

	bool src_chained;

	bool dst_chained;

	struct scatterlist result_sg;

	struct sg_table dst_tbl;

	struct scatterlist *dst_sg;

drivers/crypto/qce/dma.c

+0 −52
Original line number Diff line number Diff line
@@ -54,58 +54,6 @@ void qce_dma_release(struct qce_dma_data *dma) 
	kfree(dma->result_buf);

}



int qce_mapsg(struct device *dev, struct scatterlist *sg, int nents,

	      enum dma_data_direction dir, bool chained)

{

	int err;



	if (chained) {

		while (sg) {

			err = dma_map_sg(dev, sg, 1, dir);

			if (!err)

				return -EFAULT;

			sg = sg_next(sg);

		}

	} else {

		err = dma_map_sg(dev, sg, nents, dir);

		if (!err)

			return -EFAULT;

	}



	return nents;

}



void qce_unmapsg(struct device *dev, struct scatterlist *sg, int nents,

		 enum dma_data_direction dir, bool chained)

{

	if (chained)

		while (sg) {

			dma_unmap_sg(dev, sg, 1, dir);

			sg = sg_next(sg);

		}

	else

		dma_unmap_sg(dev, sg, nents, dir);

}



int qce_countsg(struct scatterlist *sglist, int nbytes, bool *chained)

{

	struct scatterlist *sg = sglist;

	int nents = 0;



	if (chained)

		*chained = false;



	while (nbytes > 0 && sg) {

		nents++;

		nbytes -= sg->length;

		if (!sg_is_last(sg) && (sg + 1)->length == 0 && chained)

			*chained = true;

		sg = sg_next(sg);

	}



	return nents;

}



struct scatterlist *

qce_sgtable_add(struct sg_table *sgt, struct scatterlist *new_sgl)

{

drivers/crypto/qce/dma.h

+0 −5
Original line number Diff line number Diff line
@@ -49,11 +49,6 @@ int qce_dma_prep_sgs(struct qce_dma_data *dma, struct scatterlist *sg_in, 
		     dma_async_tx_callback cb, void *cb_param);

void qce_dma_issue_pending(struct qce_dma_data *dma);

int qce_dma_terminate_all(struct qce_dma_data *dma);

int qce_countsg(struct scatterlist *sg_list, int nbytes, bool *chained);

void qce_unmapsg(struct device *dev, struct scatterlist *sg, int nents,

		 enum dma_data_direction dir, bool chained);

int qce_mapsg(struct device *dev, struct scatterlist *sg, int nents,

	      enum dma_data_direction dir, bool chained);

struct scatterlist *

qce_sgtable_add(struct sg_table *sgt, struct scatterlist *sg_add);

drivers/crypto/qce/sha.c

+7 −11
Original line number Diff line number Diff line
@@ -51,9 +51,8 @@ static void qce_ahash_done(void *data) 
	if (error)

		dev_dbg(qce->dev, "ahash dma termination error (%d)\n", error);



	qce_unmapsg(qce->dev, req->src, rctx->src_nents, DMA_TO_DEVICE,

		    rctx->src_chained);

	qce_unmapsg(qce->dev, &rctx->result_sg, 1, DMA_FROM_DEVICE, 0);

	dma_unmap_sg(qce->dev, req->src, rctx->src_nents, DMA_TO_DEVICE);

	dma_unmap_sg(qce->dev, &rctx->result_sg, 1, DMA_FROM_DEVICE);



	memcpy(rctx->digest, result->auth_iv, digestsize);

	if (req->result)
@@ -92,16 +91,14 @@ static int qce_ahash_async_req_handle(struct crypto_async_request *async_req) 
		rctx->authklen = AES_KEYSIZE_128;

	}



	rctx->src_nents = qce_countsg(req->src, req->nbytes,

				      &rctx->src_chained);

	ret = qce_mapsg(qce->dev, req->src, rctx->src_nents, DMA_TO_DEVICE,

			rctx->src_chained);

	rctx->src_nents = sg_nents_for_len(req->src, req->nbytes);

	ret = dma_map_sg(qce->dev, req->src, rctx->src_nents, DMA_TO_DEVICE);

	if (ret < 0)

		return ret;



	sg_init_one(&rctx->result_sg, qce->dma.result_buf, QCE_RESULT_BUF_SZ);



	ret = qce_mapsg(qce->dev, &rctx->result_sg, 1, DMA_FROM_DEVICE, 0);

	ret = dma_map_sg(qce->dev, &rctx->result_sg, 1, DMA_FROM_DEVICE);

	if (ret < 0)

		goto error_unmap_src;
@@ -121,10 +118,9 @@ static int qce_ahash_async_req_handle(struct crypto_async_request *async_req) 
error_terminate:

	qce_dma_terminate_all(&qce->dma);

error_unmap_dst:

	qce_unmapsg(qce->dev, &rctx->result_sg, 1, DMA_FROM_DEVICE, 0);

	dma_unmap_sg(qce->dev, &rctx->result_sg, 1, DMA_FROM_DEVICE);

error_unmap_src:

	qce_unmapsg(qce->dev, req->src, rctx->src_nents, DMA_TO_DEVICE,

		    rctx->src_chained);

	dma_unmap_sg(qce->dev, req->src, rctx->src_nents, DMA_TO_DEVICE);

	return ret;

}