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Subject[PATCH v3 06/17] 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>
---
drivers/crypto/talitos.c | 24 +++++++++++++++++-------
1 file changed, 17 insertions(+), 7 deletions(-)

diff --git a/drivers/crypto/talitos.c b/drivers/crypto/talitos.c
index 81e5636..bca6ded 100644
--- a/drivers/crypto/talitos.c
+++ b/drivers/crypto/talitos.c
@@ -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);

--
2.1.0


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