mirror of
https://mirrors.bfsu.edu.cn/git/linux.git
synced 2024-11-11 04:18:39 +08:00
crypto: talitos - dma_map_sg can handle chained SG
The talitos 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 talitos_map_sg, talitos_unmap_sg_chain and sg_count functions. Signed-off-by: LABBE Corentin <clabbe.montjoie@gmail.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
LABBE Corentin
Herbert Xu
parent
be2cfac076
commit
b8a011d41c
@ -857,8 +857,6 @@ badkey:
|
||||
* talitos_edesc - s/w-extended descriptor
|
||||
* @src_nents: number of segments in input scatterlist
|
||||
* @dst_nents: number of segments in output scatterlist
|
||||
* @src_chained: whether src is chained or not
|
||||
* @dst_chained: whether dst is chained or not
|
||||
* @icv_ool: whether ICV is out-of-line
|
||||
* @iv_dma: dma address of iv for checking continuity and link table
|
||||
* @dma_len: length of dma mapped link_tbl space
|
||||
@ -874,8 +872,6 @@ badkey:
|
||||
struct talitos_edesc {
|
||||
int src_nents;
|
||||
int dst_nents;
|
||||
bool src_chained;
|
||||
bool dst_chained;
|
||||
bool icv_ool;
|
||||
dma_addr_t iv_dma;
|
||||
int dma_len;
|
||||
@ -887,29 +883,6 @@ struct talitos_edesc {
|
||||
};
|
||||
};
|
||||
|
||||
static int talitos_map_sg(struct device *dev, struct scatterlist *sg,
|
||||
unsigned int nents, enum dma_data_direction dir,
|
||||
bool chained)
|
||||
{
|
||||
if (unlikely(chained))
|
||||
while (sg) {
|
||||
dma_map_sg(dev, sg, 1, dir);
|
||||
sg = sg_next(sg);
|
||||
}
|
||||
else
|
||||
dma_map_sg(dev, sg, nents, dir);
|
||||
return nents;
|
||||
}
|
||||
|
||||
static void talitos_unmap_sg_chain(struct device *dev, struct scatterlist *sg,
|
||||
enum dma_data_direction dir)
|
||||
{
|
||||
while (sg) {
|
||||
dma_unmap_sg(dev, sg, 1, dir);
|
||||
sg = sg_next(sg);
|
||||
}
|
||||
}
|
||||
|
||||
static void talitos_sg_unmap(struct device *dev,
|
||||
struct talitos_edesc *edesc,
|
||||
struct scatterlist *src,
|
||||
@ -919,24 +892,13 @@ static void talitos_sg_unmap(struct device *dev,
|
||||
unsigned int dst_nents = edesc->dst_nents ? : 1;
|
||||
|
||||
if (src != dst) {
|
||||
if (edesc->src_chained)
|
||||
talitos_unmap_sg_chain(dev, src, DMA_TO_DEVICE);
|
||||
else
|
||||
dma_unmap_sg(dev, src, src_nents, DMA_TO_DEVICE);
|
||||
dma_unmap_sg(dev, src, src_nents, DMA_TO_DEVICE);
|
||||
|
||||
if (dst) {
|
||||
if (edesc->dst_chained)
|
||||
talitos_unmap_sg_chain(dev, dst,
|
||||
DMA_FROM_DEVICE);
|
||||
else
|
||||
dma_unmap_sg(dev, dst, dst_nents,
|
||||
DMA_FROM_DEVICE);
|
||||
dma_unmap_sg(dev, dst, dst_nents, DMA_FROM_DEVICE);
|
||||
}
|
||||
} else
|
||||
if (edesc->src_chained)
|
||||
talitos_unmap_sg_chain(dev, src, DMA_BIDIRECTIONAL);
|
||||
else
|
||||
dma_unmap_sg(dev, src, src_nents, DMA_BIDIRECTIONAL);
|
||||
dma_unmap_sg(dev, src, src_nents, DMA_BIDIRECTIONAL);
|
||||
}
|
||||
|
||||
static void ipsec_esp_unmap(struct device *dev,
|
||||
@ -1118,10 +1080,9 @@ static int ipsec_esp(struct talitos_edesc *edesc, struct aead_request *areq,
|
||||
map_single_talitos_ptr(dev, &desc->ptr[0], ctx->authkeylen, &ctx->key,
|
||||
DMA_TO_DEVICE);
|
||||
|
||||
sg_count = talitos_map_sg(dev, areq->src, edesc->src_nents ?: 1,
|
||||
(areq->src == areq->dst) ? DMA_BIDIRECTIONAL
|
||||
: DMA_TO_DEVICE,
|
||||
edesc->src_chained);
|
||||
sg_count = dma_map_sg(dev, areq->src, edesc->src_nents ?: 1,
|
||||
(areq->src == areq->dst) ? DMA_BIDIRECTIONAL
|
||||
: DMA_TO_DEVICE);
|
||||
|
||||
/* hmac data */
|
||||
desc->ptr[1].len = cpu_to_be16(areq->assoclen);
|
||||
@ -1185,9 +1146,8 @@ static int ipsec_esp(struct talitos_edesc *edesc, struct aead_request *areq,
|
||||
desc->ptr[5].j_extent = authsize;
|
||||
|
||||
if (areq->src != areq->dst)
|
||||
sg_count = talitos_map_sg(dev, areq->dst,
|
||||
edesc->dst_nents ? : 1,
|
||||
DMA_FROM_DEVICE, edesc->dst_chained);
|
||||
sg_count = dma_map_sg(dev, areq->dst, edesc->dst_nents ? : 1,
|
||||
DMA_FROM_DEVICE);
|
||||
|
||||
edesc->icv_ool = false;
|
||||
|
||||
@ -1233,26 +1193,6 @@ static int ipsec_esp(struct talitos_edesc *edesc, struct aead_request *areq,
|
||||
return ret;
|
||||
}
|
||||
|
||||
/*
|
||||
* derive number of elements in scatterlist
|
||||
*/
|
||||
static int sg_count(struct scatterlist *sg_list, int nbytes, bool *chained)
|
||||
{
|
||||
struct scatterlist *sg = sg_list;
|
||||
int sg_nents = 0;
|
||||
|
||||
*chained = false;
|
||||
while (nbytes > 0 && sg) {
|
||||
sg_nents++;
|
||||
nbytes -= sg->length;
|
||||
if (!sg_is_last(sg) && (sg + 1)->length == 0)
|
||||
*chained = true;
|
||||
sg = sg_next(sg);
|
||||
}
|
||||
|
||||
return sg_nents;
|
||||
}
|
||||
|
||||
/*
|
||||
* allocate and map the extended descriptor
|
||||
*/
|
||||
@ -1270,7 +1210,6 @@ static struct talitos_edesc *talitos_edesc_alloc(struct device *dev,
|
||||
{
|
||||
struct talitos_edesc *edesc;
|
||||
int src_nents, dst_nents, alloc_len, dma_len;
|
||||
bool src_chained = false, dst_chained = false;
|
||||
dma_addr_t iv_dma = 0;
|
||||
gfp_t flags = cryptoflags & CRYPTO_TFM_REQ_MAY_SLEEP ? GFP_KERNEL :
|
||||
GFP_ATOMIC;
|
||||
@ -1287,18 +1226,16 @@ static struct talitos_edesc *talitos_edesc_alloc(struct device *dev,
|
||||
iv_dma = dma_map_single(dev, iv, ivsize, DMA_TO_DEVICE);
|
||||
|
||||
if (!dst || dst == src) {
|
||||
src_nents = sg_count(src, assoclen + cryptlen + authsize,
|
||||
&src_chained);
|
||||
src_nents = sg_nents_for_len(src,
|
||||
assoclen + cryptlen + authsize);
|
||||
src_nents = (src_nents == 1) ? 0 : src_nents;
|
||||
dst_nents = dst ? src_nents : 0;
|
||||
} else { /* dst && dst != src*/
|
||||
src_nents = sg_count(src, assoclen + cryptlen +
|
||||
(encrypt ? 0 : authsize),
|
||||
&src_chained);
|
||||
src_nents = sg_nents_for_len(src, assoclen + cryptlen +
|
||||
(encrypt ? 0 : authsize));
|
||||
src_nents = (src_nents == 1) ? 0 : src_nents;
|
||||
dst_nents = sg_count(dst, assoclen + cryptlen +
|
||||
(encrypt ? authsize : 0),
|
||||
&dst_chained);
|
||||
dst_nents = sg_nents_for_len(dst, assoclen + cryptlen +
|
||||
(encrypt ? authsize : 0));
|
||||
dst_nents = (dst_nents == 1) ? 0 : dst_nents;
|
||||
}
|
||||
|
||||
@ -1332,8 +1269,6 @@ static struct talitos_edesc *talitos_edesc_alloc(struct device *dev,
|
||||
|
||||
edesc->src_nents = src_nents;
|
||||
edesc->dst_nents = dst_nents;
|
||||
edesc->src_chained = src_chained;
|
||||
edesc->dst_chained = dst_chained;
|
||||
edesc->iv_dma = iv_dma;
|
||||
edesc->dma_len = dma_len;
|
||||
if (dma_len)
|
||||
@ -1518,8 +1453,7 @@ int map_sg_in_talitos_ptr(struct device *dev, struct scatterlist *src,
|
||||
} else {
|
||||
to_talitos_ptr_extent_clear(ptr, is_sec1);
|
||||
|
||||
sg_count = talitos_map_sg(dev, src, edesc->src_nents ? : 1, dir,
|
||||
edesc->src_chained);
|
||||
sg_count = dma_map_sg(dev, src, edesc->src_nents ? : 1, dir);
|
||||
|
||||
if (sg_count == 1) {
|
||||
to_talitos_ptr(ptr, sg_dma_address(src), is_sec1);
|
||||
@ -1552,8 +1486,7 @@ void map_sg_out_talitos_ptr(struct device *dev, struct scatterlist *dst,
|
||||
bool is_sec1 = has_ftr_sec1(priv);
|
||||
|
||||
if (dir != DMA_NONE)
|
||||
sg_count = talitos_map_sg(dev, dst, edesc->dst_nents ? : 1,
|
||||
dir, edesc->dst_chained);
|
||||
sg_count = dma_map_sg(dev, dst, edesc->dst_nents ? : 1, dir);
|
||||
|
||||
to_talitos_ptr_len(ptr, len, is_sec1);
|
||||
|
||||
@ -1897,12 +1830,11 @@ static int ahash_process_req(struct ahash_request *areq, unsigned int nbytes)
|
||||
unsigned int nbytes_to_hash;
|
||||
unsigned int to_hash_later;
|
||||
unsigned int nsg;
|
||||
bool chained;
|
||||
|
||||
if (!req_ctx->last && (nbytes + req_ctx->nbuf <= blocksize)) {
|
||||
/* Buffer up to one whole block */
|
||||
sg_copy_to_buffer(areq->src,
|
||||
sg_count(areq->src, nbytes, &chained),
|
||||
sg_nents_for_len(areq->src, nbytes),
|
||||
req_ctx->buf + req_ctx->nbuf, nbytes);
|
||||
req_ctx->nbuf += nbytes;
|
||||
return 0;
|
||||
@ -1935,7 +1867,7 @@ static int ahash_process_req(struct ahash_request *areq, unsigned int nbytes)
|
||||
req_ctx->psrc = areq->src;
|
||||
|
||||
if (to_hash_later) {
|
||||
int nents = sg_count(areq->src, nbytes, &chained);
|
||||
int nents = sg_nents_for_len(areq->src, nbytes);
|
||||
sg_pcopy_to_buffer(areq->src, nents,
|
||||
req_ctx->bufnext,
|
||||
to_hash_later,
|
||||
|
||||
Loading…
Reference in New Issue
Block a user