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crypto: caam - use dma_map_sg() return code

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dma_map_sg() might coalesce S/G entries, so use the number of S/G
entries returned by it instead of what sg_nents_for_len() initially
returns.

Signed-off-by: Horia Geantă <horia.geanta@nxp.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Horia Geantă 2017-02-10 14:07:20 +02:00 committed by Herbert Xu
parent fa0c92db1e
commit 838e0a89e3
1 changed files with 80 additions and 71 deletions
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151
drivers/crypto/caam/caamalg.c
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@ -1328,9 +1328,8 @@ static struct aead_edesc *aead_edesc_alloc(struct aead_request *req,
struct device *jrdev = ctx->jrdev;
gfp_t flags = (req->base.flags & (CRYPTO_TFM_REQ_MAY_BACKLOG |
CRYPTO_TFM_REQ_MAY_SLEEP)) ? GFP_KERNEL : GFP_ATOMIC;
int src_nents, dst_nents = 0;
int src_nents, mapped_src_nents, dst_nents = 0, mapped_dst_nents = 0;
struct aead_edesc *edesc;
int sgc;
int sec4_sg_index, sec4_sg_len, sec4_sg_bytes;
unsigned int authsize = ctx->authsize;
@ -1365,60 +1364,62 @@ static struct aead_edesc *aead_edesc_alloc(struct aead_request *req,
}
}
sec4_sg_len = src_nents > 1 ? src_nents : 0;
sec4_sg_len += dst_nents > 1 ? dst_nents : 0;
if (likely(req->src == req->dst)) {
mapped_src_nents = dma_map_sg(jrdev, req->src, src_nents,
DMA_BIDIRECTIONAL);
if (unlikely(!mapped_src_nents)) {
dev_err(jrdev, "unable to map source\n");
return ERR_PTR(-ENOMEM);
}
} else {
/* Cover also the case of null (zero length) input data */
if (src_nents) {
mapped_src_nents = dma_map_sg(jrdev, req->src,
src_nents, DMA_TO_DEVICE);
if (unlikely(!mapped_src_nents)) {
dev_err(jrdev, "unable to map source\n");
return ERR_PTR(-ENOMEM);
}
} else {
mapped_src_nents = 0;
}
mapped_dst_nents = dma_map_sg(jrdev, req->dst, dst_nents,
DMA_FROM_DEVICE);
if (unlikely(!mapped_dst_nents)) {
dev_err(jrdev, "unable to map destination\n");
dma_unmap_sg(jrdev, req->src, src_nents, DMA_TO_DEVICE);
return ERR_PTR(-ENOMEM);
}
}
sec4_sg_len = mapped_src_nents > 1 ? mapped_src_nents : 0;
sec4_sg_len += mapped_dst_nents > 1 ? mapped_dst_nents : 0;
sec4_sg_bytes = sec4_sg_len * sizeof(struct sec4_sg_entry);
/* allocate space for base edesc and hw desc commands, link tables */
edesc = kzalloc(sizeof(*edesc) + desc_bytes + sec4_sg_bytes,
GFP_DMA | flags);
if (!edesc) {
dev_err(jrdev, "could not allocate extended descriptor\n");
caam_unmap(jrdev, req->src, req->dst, src_nents, dst_nents, 0,
0, 0, 0);
return ERR_PTR(-ENOMEM);
}
if (likely(req->src == req->dst)) {
sgc = dma_map_sg(jrdev, req->src, src_nents, DMA_BIDIRECTIONAL);
if (unlikely(!sgc)) {
dev_err(jrdev, "unable to map source\n");
kfree(edesc);
return ERR_PTR(-ENOMEM);
}
} else {
/* Cover also the case of null (zero length) input data */
if (src_nents) {
sgc = dma_map_sg(jrdev, req->src, src_nents,
DMA_TO_DEVICE);
if (unlikely(!sgc)) {
dev_err(jrdev, "unable to map source\n");
kfree(edesc);
return ERR_PTR(-ENOMEM);
}
}
sgc = dma_map_sg(jrdev, req->dst, dst_nents, DMA_FROM_DEVICE);
if (unlikely(!sgc)) {
dev_err(jrdev, "unable to map destination\n");
dma_unmap_sg(jrdev, req->src, src_nents, DMA_TO_DEVICE);
kfree(edesc);
return ERR_PTR(-ENOMEM);
}
}
edesc->src_nents = src_nents;
edesc->dst_nents = dst_nents;
edesc->sec4_sg = (void *)edesc + sizeof(struct aead_edesc) +
desc_bytes;
*all_contig_ptr = !(src_nents > 1);
*all_contig_ptr = !(mapped_src_nents > 1);
sec4_sg_index = 0;
if (src_nents > 1) {
sg_to_sec4_sg_last(req->src, src_nents,
edesc->sec4_sg + sec4_sg_index, 0);
sec4_sg_index += src_nents;
if (mapped_src_nents > 1) {
sg_to_sec4_sg_last(req->src, mapped_src_nents,
edesc->sec4_sg + sec4_sg_index, 0);
sec4_sg_index += mapped_src_nents;
}
if (dst_nents > 1) {
sg_to_sec4_sg_last(req->dst, dst_nents,
if (mapped_dst_nents > 1) {
sg_to_sec4_sg_last(req->dst, mapped_dst_nents,
edesc->sec4_sg + sec4_sg_index, 0);
}
@ -1616,13 +1617,12 @@ static struct ablkcipher_edesc *ablkcipher_edesc_alloc(struct ablkcipher_request
gfp_t flags = (req->base.flags & (CRYPTO_TFM_REQ_MAY_BACKLOG |
CRYPTO_TFM_REQ_MAY_SLEEP)) ?
GFP_KERNEL : GFP_ATOMIC;
int src_nents, dst_nents = 0, sec4_sg_bytes;
int src_nents, mapped_src_nents, dst_nents = 0, mapped_dst_nents = 0;
struct ablkcipher_edesc *edesc;
dma_addr_t iv_dma = 0;
bool in_contig;
int sgc;
int ivsize = crypto_ablkcipher_ivsize(ablkcipher);
int dst_sg_idx, sec4_sg_ents;
int dst_sg_idx, sec4_sg_ents, sec4_sg_bytes;
src_nents = sg_nents_for_len(req->src, req->nbytes);
if (unlikely(src_nents < 0)) {
@ -1641,20 +1641,23 @@ static struct ablkcipher_edesc *ablkcipher_edesc_alloc(struct ablkcipher_request
}
if (likely(req->src == req->dst)) {
sgc = dma_map_sg(jrdev, req->src, src_nents, DMA_BIDIRECTIONAL);
if (unlikely(!sgc)) {
mapped_src_nents = dma_map_sg(jrdev, req->src, src_nents,
DMA_BIDIRECTIONAL);
if (unlikely(!mapped_src_nents)) {
dev_err(jrdev, "unable to map source\n");
return ERR_PTR(-ENOMEM);
}
} else {
sgc = dma_map_sg(jrdev, req->src, src_nents, DMA_TO_DEVICE);
if (unlikely(!sgc)) {
mapped_src_nents = dma_map_sg(jrdev, req->src, src_nents,
DMA_TO_DEVICE);
if (unlikely(!mapped_src_nents)) {
dev_err(jrdev, "unable to map source\n");
return ERR_PTR(-ENOMEM);
}
sgc = dma_map_sg(jrdev, req->dst, dst_nents, DMA_FROM_DEVICE);
if (unlikely(!sgc)) {
mapped_dst_nents = dma_map_sg(jrdev, req->dst, dst_nents,
DMA_FROM_DEVICE);
if (unlikely(!mapped_dst_nents)) {
dev_err(jrdev, "unable to map destination\n");
dma_unmap_sg(jrdev, req->src, src_nents, DMA_TO_DEVICE);
return ERR_PTR(-ENOMEM);
@ -1669,15 +1672,16 @@ static struct ablkcipher_edesc *ablkcipher_edesc_alloc(struct ablkcipher_request
return ERR_PTR(-ENOMEM);
}
if (src_nents == 1 && iv_dma + ivsize == sg_dma_address(req->src)) {
if (mapped_src_nents == 1 &&
iv_dma + ivsize == sg_dma_address(req->src)) {
in_contig = true;
sec4_sg_ents = 0;
} else {
in_contig = false;
sec4_sg_ents = 1 + src_nents;
sec4_sg_ents = 1 + mapped_src_nents;
}
dst_sg_idx = sec4_sg_ents;
sec4_sg_ents += dst_nents > 1 ? dst_nents : 0;
sec4_sg_ents += mapped_dst_nents > 1 ? mapped_dst_nents : 0;
sec4_sg_bytes = sec4_sg_ents * sizeof(struct sec4_sg_entry);
/* allocate space for base edesc and hw desc commands, link tables */
@ -1698,13 +1702,13 @@ static struct ablkcipher_edesc *ablkcipher_edesc_alloc(struct ablkcipher_request
if (!in_contig) {
dma_to_sec4_sg_one(edesc->sec4_sg, iv_dma, ivsize, 0);
sg_to_sec4_sg_last(req->src, src_nents,
sg_to_sec4_sg_last(req->src, mapped_src_nents,
edesc->sec4_sg + 1, 0);
}
if (dst_nents > 1) {
sg_to_sec4_sg_last(req->dst, dst_nents,
edesc->sec4_sg + dst_sg_idx, 0);
if (mapped_dst_nents > 1) {
sg_to_sec4_sg_last(req->dst, mapped_dst_nents,
edesc->sec4_sg + dst_sg_idx, 0);
}
edesc->sec4_sg_dma = dma_map_single(jrdev, edesc->sec4_sg,
@ -1819,13 +1823,12 @@ static struct ablkcipher_edesc *ablkcipher_giv_edesc_alloc(
gfp_t flags = (req->base.flags & (CRYPTO_TFM_REQ_MAY_BACKLOG |
CRYPTO_TFM_REQ_MAY_SLEEP)) ?
GFP_KERNEL : GFP_ATOMIC;
int src_nents, dst_nents, sec4_sg_bytes;
int src_nents, mapped_src_nents, dst_nents, mapped_dst_nents;
struct ablkcipher_edesc *edesc;
dma_addr_t iv_dma = 0;
bool out_contig;
int sgc;
int ivsize = crypto_ablkcipher_ivsize(ablkcipher);
int dst_sg_idx, sec4_sg_ents;
int dst_sg_idx, sec4_sg_ents, sec4_sg_bytes;
src_nents = sg_nents_for_len(req->src, req->nbytes);
if (unlikely(src_nents < 0)) {
@ -1835,16 +1838,19 @@ static struct ablkcipher_edesc *ablkcipher_giv_edesc_alloc(
}
if (likely(req->src == req->dst)) {
sgc = dma_map_sg(jrdev, req->src, src_nents, DMA_BIDIRECTIONAL);
if (unlikely(!sgc)) {
mapped_src_nents = dma_map_sg(jrdev, req->src, src_nents,
DMA_BIDIRECTIONAL);
if (unlikely(!mapped_src_nents)) {
dev_err(jrdev, "unable to map source\n");
return ERR_PTR(-ENOMEM);
}
dst_nents = src_nents;
mapped_dst_nents = src_nents;
} else {
sgc = dma_map_sg(jrdev, req->src, src_nents, DMA_TO_DEVICE);
if (unlikely(!sgc)) {
mapped_src_nents = dma_map_sg(jrdev, req->src, src_nents,
DMA_TO_DEVICE);
if (unlikely(!mapped_src_nents)) {
dev_err(jrdev, "unable to map source\n");
return ERR_PTR(-ENOMEM);
}
@ -1856,8 +1862,9 @@ static struct ablkcipher_edesc *ablkcipher_giv_edesc_alloc(
return ERR_PTR(dst_nents);
}
sgc = dma_map_sg(jrdev, req->dst, dst_nents, DMA_FROM_DEVICE);
if (unlikely(!sgc)) {
mapped_dst_nents = dma_map_sg(jrdev, req->dst, dst_nents,
DMA_FROM_DEVICE);
if (unlikely(!mapped_dst_nents)) {
dev_err(jrdev, "unable to map destination\n");
dma_unmap_sg(jrdev, req->src, src_nents, DMA_TO_DEVICE);
return ERR_PTR(-ENOMEM);
@ -1876,13 +1883,14 @@ static struct ablkcipher_edesc *ablkcipher_giv_edesc_alloc(
return ERR_PTR(-ENOMEM);
}
sec4_sg_ents = src_nents > 1 ? src_nents : 0;
sec4_sg_ents = mapped_src_nents > 1 ? mapped_src_nents : 0;
dst_sg_idx = sec4_sg_ents;
if (dst_nents == 1 && iv_dma + ivsize == sg_dma_address(req->dst)) {
if (mapped_dst_nents == 1 &&
iv_dma + ivsize == sg_dma_address(req->dst)) {
out_contig = true;
} else {
out_contig = false;
sec4_sg_ents += 1 + dst_nents;
sec4_sg_ents += 1 + mapped_dst_nents;
}
/* allocate space for base edesc and hw desc commands, link tables */
@ -1902,13 +1910,14 @@ static struct ablkcipher_edesc *ablkcipher_giv_edesc_alloc(
edesc->sec4_sg = (void *)edesc + sizeof(struct ablkcipher_edesc) +
desc_bytes;
if (src_nents > 1)
sg_to_sec4_sg_last(req->src, src_nents, edesc->sec4_sg, 0);
if (mapped_src_nents > 1)
sg_to_sec4_sg_last(req->src, mapped_src_nents, edesc->sec4_sg,
0);
if (!out_contig) {
dma_to_sec4_sg_one(edesc->sec4_sg + dst_sg_idx,
iv_dma, ivsize, 0);
sg_to_sec4_sg_last(req->dst, dst_nents,
sg_to_sec4_sg_last(req->dst, mapped_dst_nents,
edesc->sec4_sg + dst_sg_idx + 1, 0);
}