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crypto: talitos - do hw_context DMA mapping outside the requests 

At every request, we map and unmap the same hash hw_context.

This patch moves the dma mapping/unmapping in functions ahash_init()
and ahash_import().

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 15:05:04 +02:00 committed by Herbert Xu
parent 2e13ce0812
commit 49f9783b0c
1 changed files with 57 additions and 23 deletions
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80
drivers/crypto/talitos.c
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@ -819,6 +819,7 @@ struct talitos_ctx {
unsigned int keylen;
unsigned int enckeylen;
unsigned int authkeylen;
dma_addr_t dma_hw_context;
};
#define HASH_MAX_BLOCK_SIZE SHA512_BLOCK_SIZE
@ -1663,18 +1664,9 @@ static void common_nonsnoop_hash_unmap(struct device *dev,
struct ahash_request *areq)
{
struct talitos_ahash_req_ctx *req_ctx = ahash_request_ctx(areq);
struct talitos_private *priv = dev_get_drvdata(dev);
bool is_sec1 = has_ftr_sec1(priv);
unmap_single_talitos_ptr(dev, &edesc->desc.ptr[5], DMA_FROM_DEVICE);
talitos_sg_unmap(dev, edesc, req_ctx->psrc, NULL, 0, 0);
/* When using hashctx-in, must unmap it. */
if (from_talitos_ptr_len(&edesc->desc.ptr[1], is_sec1))
unmap_single_talitos_ptr(dev, &edesc->desc.ptr[1],
DMA_TO_DEVICE);
if (edesc->dma_len)
dma_unmap_single(dev, edesc->dma_link_tbl, edesc->dma_len,
DMA_BIDIRECTIONAL);
@ -1744,10 +1736,8 @@ static int common_nonsnoop_hash(struct talitos_edesc *edesc,
/* hash context in */
if (!req_ctx->first || req_ctx->swinit) {
map_single_talitos_ptr(dev, &desc->ptr[1],
req_ctx->hw_context_size,
(char *)req_ctx->hw_context,
DMA_TO_DEVICE);
to_talitos_ptr(&desc->ptr[1], ctx->dma_hw_context,
req_ctx->hw_context_size, is_sec1);
req_ctx->swinit = 0;
}
/* Indicate next op is not the first. */
@ -1780,9 +1770,8 @@ static int common_nonsnoop_hash(struct talitos_edesc *edesc,
crypto_ahash_digestsize(tfm),
areq->result, DMA_FROM_DEVICE);
else
map_single_talitos_ptr(dev, &desc->ptr[5],
req_ctx->hw_context_size,
req_ctx->hw_context, DMA_FROM_DEVICE);
to_talitos_ptr(&desc->ptr[5], ctx->dma_hw_context,
req_ctx->hw_context_size, is_sec1);
/* last DWORD empty */
@ -1815,17 +1804,25 @@ static struct talitos_edesc *ahash_edesc_alloc(struct ahash_request *areq,
static int ahash_init(struct ahash_request *areq)
{
struct crypto_ahash *tfm = crypto_ahash_reqtfm(areq);
struct talitos_ctx *ctx = crypto_ahash_ctx(tfm);
struct device *dev = ctx->dev;
struct talitos_ahash_req_ctx *req_ctx = ahash_request_ctx(areq);
unsigned int size;
/* Initialize the context */
req_ctx->nbuf = 0;
req_ctx->first = 1; /* first indicates h/w must init its context */
req_ctx->swinit = 0; /* assume h/w init of context */
req_ctx->hw_context_size =
(crypto_ahash_digestsize(tfm) <= SHA256_DIGEST_SIZE)
size = (crypto_ahash_digestsize(tfm) <= SHA256_DIGEST_SIZE)
? TALITOS_MDEU_CONTEXT_SIZE_MD5_SHA1_SHA256
: TALITOS_MDEU_CONTEXT_SIZE_SHA384_SHA512;
req_ctx->hw_context_size = size;
if (ctx->dma_hw_context)
dma_unmap_single(dev, ctx->dma_hw_context, size,
DMA_BIDIRECTIONAL);
ctx->dma_hw_context = dma_map_single(dev, req_ctx->hw_context, size,
DMA_BIDIRECTIONAL);
return 0;
}
@ -1836,6 +1833,9 @@ static int ahash_init(struct ahash_request *areq)
static int ahash_init_sha224_swinit(struct ahash_request *areq)
{
struct talitos_ahash_req_ctx *req_ctx = ahash_request_ctx(areq);
struct crypto_ahash *tfm = crypto_ahash_reqtfm(areq);
struct talitos_ctx *ctx = crypto_ahash_ctx(tfm);
struct device *dev = ctx->dev;
ahash_init(areq);
req_ctx->swinit = 1;/* prevent h/w initting context with sha256 values*/
@ -1853,6 +1853,9 @@ static int ahash_init_sha224_swinit(struct ahash_request *areq)
req_ctx->hw_context[8] = 0;
req_ctx->hw_context[9] = 0;
dma_sync_single_for_device(dev, ctx->dma_hw_context,
req_ctx->hw_context_size, DMA_TO_DEVICE);
return 0;
}
@ -1990,7 +1993,12 @@ static int ahash_export(struct ahash_request *areq, void *out)
{
struct talitos_ahash_req_ctx *req_ctx = ahash_request_ctx(areq);
struct talitos_export_state *export = out;
struct crypto_ahash *ahash = crypto_ahash_reqtfm(areq);
struct talitos_ctx *ctx = crypto_ahash_ctx(ahash);
struct device *dev = ctx->dev;
dma_sync_single_for_cpu(dev, ctx->dma_hw_context,
req_ctx->hw_context_size, DMA_FROM_DEVICE);
memcpy(export->hw_context, req_ctx->hw_context,
req_ctx->hw_context_size);
memcpy(export->buf, req_ctx->buf, req_ctx->nbuf);
@ -2008,14 +2016,22 @@ static int ahash_import(struct ahash_request *areq, const void *in)
struct talitos_ahash_req_ctx *req_ctx = ahash_request_ctx(areq);
struct crypto_ahash *tfm = crypto_ahash_reqtfm(areq);
const struct talitos_export_state *export = in;
unsigned int size;
struct talitos_ctx *ctx = crypto_ahash_ctx(tfm);
struct device *dev = ctx->dev;
memset(req_ctx, 0, sizeof(*req_ctx));
req_ctx->hw_context_size =
(crypto_ahash_digestsize(tfm) <= SHA256_DIGEST_SIZE)
size = (crypto_ahash_digestsize(tfm) <= SHA256_DIGEST_SIZE)
? TALITOS_MDEU_CONTEXT_SIZE_MD5_SHA1_SHA256
: TALITOS_MDEU_CONTEXT_SIZE_SHA384_SHA512;
memcpy(req_ctx->hw_context, export->hw_context,
req_ctx->hw_context_size);
req_ctx->hw_context_size = size;
if (ctx->dma_hw_context)
dma_unmap_single(dev, ctx->dma_hw_context, size,
DMA_BIDIRECTIONAL);
memcpy(req_ctx->hw_context, export->hw_context, size);
ctx->dma_hw_context = dma_map_single(dev, req_ctx->hw_context, size,
DMA_BIDIRECTIONAL);
memcpy(req_ctx->buf, export->buf, export->nbuf);
req_ctx->swinit = export->swinit;
req_ctx->first = export->first;
@ -2954,6 +2970,24 @@ static void talitos_cra_exit(struct crypto_tfm *tfm)
dma_unmap_single(dev, ctx->dma_key, ctx->keylen, DMA_TO_DEVICE);
}
static void talitos_cra_exit_ahash(struct crypto_tfm *tfm)
{
struct talitos_ctx *ctx = crypto_tfm_ctx(tfm);
struct device *dev = ctx->dev;
unsigned int size;
talitos_cra_exit(tfm);
size = (crypto_ahash_digestsize(__crypto_ahash_cast(tfm)) <=
SHA256_DIGEST_SIZE)
? TALITOS_MDEU_CONTEXT_SIZE_MD5_SHA1_SHA256
: TALITOS_MDEU_CONTEXT_SIZE_SHA384_SHA512;
if (ctx->dma_hw_context)
dma_unmap_single(dev, ctx->dma_hw_context, size,
DMA_BIDIRECTIONAL);
}
/*
* given the alg's descriptor header template, determine whether descriptor
* type and primary/secondary execution units required match the hw
@ -3052,7 +3086,7 @@ static struct talitos_crypto_alg *talitos_alg_alloc(struct device *dev,
case CRYPTO_ALG_TYPE_AHASH:
alg = &t_alg->algt.alg.hash.halg.base;
alg->cra_init = talitos_cra_init_ahash;
alg->cra_exit = talitos_cra_exit;
alg->cra_exit = talitos_cra_exit_ahash;
alg->cra_type = &crypto_ahash_type;
t_alg->algt.alg.hash.init = ahash_init;
t_alg->algt.alg.hash.update = ahash_update;