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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: Christophe Leroy <christophe.leroy@c-s.fr>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
LEROY Christophe 2017-10-06 15:04:59 +02:00 committed by Herbert Xu
parent da9de146eb
commit 9a655608a4
1 changed files with 20 additions and 22 deletions
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42
drivers/crypto/talitos.c
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@ -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,
@ -1180,20 +1186,12 @@ 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,
(char *)&ctx->key + ctx->authkeylen,
DMA_TO_DEVICE);
map_single_talitos_ptr(dev, ckey_ptr, ctx->enckeylen,
(char *)&ctx->key + ctx->authkeylen,
DMA_TO_DEVICE);
/*
* cipher in
@ -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);