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Commit 9a655608 authored by LEROY Christophe's avatar LEROY Christophe Committed by Herbert Xu
Browse files

crypto: talitos - simplify tests in ipsec_esp()



Do (desc->hdr & DESC_HDR_TYPE_IPSEC_ESP) only once.
Limit number of if/else paths

Signed-off-by: default avatarChristophe Leroy <christophe.leroy@c-s.fr>
Signed-off-by: default avatarHerbert Xu <herbert@gondor.apana.org.au>
parent da9de146
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+20 −22
Original line number Diff line number Diff line
@@ -938,12 +938,15 @@ static void ipsec_esp_unmap(struct device *dev,
	struct crypto_aead *aead = crypto_aead_reqtfm(areq);
	struct talitos_ctx *ctx = crypto_aead_ctx(aead);
	unsigned int ivsize = crypto_aead_ivsize(aead);
	bool is_ipsec_esp = edesc->desc.hdr & DESC_HDR_TYPE_IPSEC_ESP;
	struct talitos_ptr *civ_ptr = &edesc->desc.ptr[is_ipsec_esp ? 2 : 3];
	struct talitos_ptr *ckey_ptr = &edesc->desc.ptr[is_ipsec_esp ? 3 : 2];

	if (edesc->desc.hdr & DESC_HDR_TYPE_IPSEC_ESP)
	if (is_ipsec_esp)
		unmap_single_talitos_ptr(dev, &edesc->desc.ptr[6],
					 DMA_FROM_DEVICE);
	unmap_single_talitos_ptr(dev, &edesc->desc.ptr[3], DMA_TO_DEVICE);
	unmap_single_talitos_ptr(dev, &edesc->desc.ptr[2], DMA_TO_DEVICE);
	unmap_single_talitos_ptr(dev, ckey_ptr, DMA_TO_DEVICE);
	unmap_single_talitos_ptr(dev, civ_ptr, DMA_TO_DEVICE);
	unmap_single_talitos_ptr(dev, &edesc->desc.ptr[0], DMA_TO_DEVICE);

	talitos_sg_unmap(dev, edesc, areq->src, areq->dst, areq->cryptlen,
@@ -953,7 +956,7 @@ static void ipsec_esp_unmap(struct device *dev,
		dma_unmap_single(dev, edesc->dma_link_tbl, edesc->dma_len,
				 DMA_BIDIRECTIONAL);

	if (!(edesc->desc.hdr & DESC_HDR_TYPE_IPSEC_ESP)) {
	if (!is_ipsec_esp) {
		unsigned int dst_nents = edesc->dst_nents ? : 1;

		sg_pcopy_to_buffer(areq->dst, dst_nents, ctx->iv, ivsize,
@@ -1156,6 +1159,9 @@ static int ipsec_esp(struct talitos_edesc *edesc, struct aead_request *areq,
	bool sync_needed = false;
	struct talitos_private *priv = dev_get_drvdata(dev);
	bool is_sec1 = has_ftr_sec1(priv);
	bool is_ipsec_esp = desc->hdr & DESC_HDR_TYPE_IPSEC_ESP;
	struct talitos_ptr *civ_ptr = &desc->ptr[is_ipsec_esp ? 2 : 3];
	struct talitos_ptr *ckey_ptr = &desc->ptr[is_ipsec_esp ? 3 : 2];

	/* hmac key */
	map_single_talitos_ptr(dev, &desc->ptr[0], ctx->authkeylen, &ctx->key,
@@ -1180,18 +1186,10 @@ static int ipsec_esp(struct talitos_edesc *edesc, struct aead_request *areq,
	}

	/* cipher iv */
	if (desc->hdr & DESC_HDR_TYPE_IPSEC_ESP)
		to_talitos_ptr(&desc->ptr[2], edesc->iv_dma, ivsize, is_sec1);
	else
		to_talitos_ptr(&desc->ptr[3], edesc->iv_dma, ivsize, is_sec1);
	to_talitos_ptr(civ_ptr, edesc->iv_dma, ivsize, is_sec1);

	/* cipher key */
	if (desc->hdr & DESC_HDR_TYPE_IPSEC_ESP)
		map_single_talitos_ptr(dev, &desc->ptr[3], ctx->enckeylen,
				       (char *)&ctx->key + ctx->authkeylen,
				       DMA_TO_DEVICE);
	else
		map_single_talitos_ptr(dev, &desc->ptr[2], ctx->enckeylen,
	map_single_talitos_ptr(dev, ckey_ptr, ctx->enckeylen,
			       (char *)&ctx->key + ctx->authkeylen,
			       DMA_TO_DEVICE);

@@ -1203,10 +1201,10 @@ static int ipsec_esp(struct talitos_edesc *edesc, struct aead_request *areq,
	 */
	sg_link_tbl_len = cryptlen;

	if (desc->hdr & DESC_HDR_TYPE_IPSEC_ESP) {
	if (is_ipsec_esp) {
		to_talitos_ptr_ext_set(&desc->ptr[4], authsize, is_sec1);

		if (edesc->desc.hdr & DESC_HDR_MODE1_MDEU_CICV)
		if (desc->hdr & DESC_HDR_MODE1_MDEU_CICV)
			sg_link_tbl_len += authsize;
	}

@@ -1228,7 +1226,7 @@ static int ipsec_esp(struct talitos_edesc *edesc, struct aead_request *areq,
	ret = talitos_sg_map(dev, areq->dst, cryptlen, edesc, &desc->ptr[5],
			     sg_count, areq->assoclen, tbl_off);

	if (desc->hdr & DESC_HDR_TYPE_IPSEC_ESP)
	if (is_ipsec_esp)
		to_talitos_ptr_ext_or(&desc->ptr[5], authsize, is_sec1);

	/* ICV data */
@@ -1237,7 +1235,7 @@ static int ipsec_esp(struct talitos_edesc *edesc, struct aead_request *areq,
		edesc->icv_ool = true;
		sync_needed = true;

		if (desc->hdr & DESC_HDR_TYPE_IPSEC_ESP) {
		if (is_ipsec_esp) {
			struct talitos_ptr *tbl_ptr = &edesc->link_tbl[tbl_off];
			int offset = (edesc->src_nents + edesc->dst_nents + 2) *
				     sizeof(struct talitos_ptr) + authsize;
@@ -1260,7 +1258,7 @@ static int ipsec_esp(struct talitos_edesc *edesc, struct aead_request *areq,

			to_talitos_ptr(&desc->ptr[6], addr, authsize, is_sec1);
		}
	} else if (!(desc->hdr & DESC_HDR_TYPE_IPSEC_ESP)) {
	} else if (!is_ipsec_esp) {
		ret = talitos_sg_map(dev, areq->dst, authsize, edesc,
				     &desc->ptr[6], sg_count, areq->assoclen +
							      cryptlen,
@@ -1277,7 +1275,7 @@ static int ipsec_esp(struct talitos_edesc *edesc, struct aead_request *areq,
	}

	/* iv out */
	if (desc->hdr & DESC_HDR_TYPE_IPSEC_ESP)
	if (is_ipsec_esp)
		map_single_talitos_ptr(dev, &desc->ptr[6], ivsize, ctx->iv,
				       DMA_FROM_DEVICE);