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crypto: talitos - helper function for ptr len 

This patch adds a helper function for reads and writes of the len
param of the talitos descriptor. This will help implement
SEC1 later.

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 2015-04-17 16:31:59 +02:00 committed by Herbert Xu
parent a2b35aa86e
commit 538caf8337
1 changed files with 17 additions and 7 deletions
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24
drivers/crypto/talitos.c
View File

@ -61,6 +61,16 @@ static void to_talitos_ptr(struct talitos_ptr *ptr, dma_addr_t dma_addr)
ptr->eptr = upper_32_bits(dma_addr);
}
static void to_talitos_ptr_len(struct talitos_ptr *ptr, unsigned short len)
{
ptr->len = cpu_to_be16(len);
}
static unsigned short from_talitos_ptr_len(struct talitos_ptr *ptr)
{
return be16_to_cpu(ptr->len);
}
static void to_talitos_ptr_extent_clear(struct talitos_ptr *ptr)
{
ptr->j_extent = 0;
@ -76,7 +86,7 @@ static void map_single_talitos_ptr(struct device *dev,
{
dma_addr_t dma_addr = dma_map_single(dev, data, len, dir);
ptr->len = cpu_to_be16(len);
to_talitos_ptr_len(ptr, len);
to_talitos_ptr(ptr, dma_addr);
to_talitos_ptr_extent_clear(ptr);
}
@ -89,7 +99,7 @@ static void unmap_single_talitos_ptr(struct device *dev,
enum dma_data_direction dir)
{
dma_unmap_single(dev, be32_to_cpu(ptr->ptr),
be16_to_cpu(ptr->len), dir);
from_talitos_ptr_len(ptr), dir);
}
static int reset_channel(struct device *dev, int ch)
@ -1375,7 +1385,7 @@ int map_sg_in_talitos_ptr(struct device *dev, struct scatterlist *src,
{
int sg_count;
ptr->len = cpu_to_be16(len);
to_talitos_ptr_len(ptr, len);
to_talitos_ptr_extent_clear(ptr);
sg_count = talitos_map_sg(dev, src, edesc->src_nents ? : 1, dir,
@ -1405,7 +1415,7 @@ void map_sg_out_talitos_ptr(struct device *dev, struct scatterlist *dst,
enum dma_data_direction dir,
struct talitos_ptr *ptr, int sg_count)
{
ptr->len = cpu_to_be16(len);
to_talitos_ptr_len(ptr, len);
to_talitos_ptr_extent_clear(ptr);
if (dir != DMA_NONE)
@ -1447,7 +1457,7 @@ static int common_nonsnoop(struct talitos_edesc *edesc,
/* cipher iv */
to_talitos_ptr(&desc->ptr[1], edesc->iv_dma);
desc->ptr[1].len = cpu_to_be16(ivsize);
to_talitos_ptr_len(&desc->ptr[1], ivsize);
to_talitos_ptr_extent_clear(&desc->ptr[1]);
/* cipher key */
@ -1539,11 +1549,11 @@ static void common_nonsnoop_hash_unmap(struct device *dev,
unmap_sg_talitos_ptr(dev, req_ctx->psrc, NULL, 0, edesc);
/* When using hashctx-in, must unmap it. */
if (edesc->desc.ptr[1].len)
if (from_talitos_ptr_len(&edesc->desc.ptr[1]))
unmap_single_talitos_ptr(dev, &edesc->desc.ptr[1],
DMA_TO_DEVICE);
if (edesc->desc.ptr[2].len)
if (from_talitos_ptr_len(&edesc->desc.ptr[2]))
unmap_single_talitos_ptr(dev, &edesc->desc.ptr[2],
DMA_TO_DEVICE);