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crypto: atmel-tdes - consolidate transfer setup

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atmel_tdes_crypt_pdc() and atmel_tdes_crypt_dma() store the transfer
length in dd->dma_size and synchronize the bounce buffers before a slow
transfer.

Move the shared code to atmel_tdes_crypt_start() and use dd->dma_size in
atmel_tdes_crypt_pdc() and atmel_tdes_crypt_dma() instead of passing the
length separately.

Signed-off-by: Thorsten Blum <blum@kernel.org>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Thorsten Blum 2026-09-16 19:17:01 +02:00 committed by Herbert Xu
parent 9fa551ef51
commit bbdc0b7a8e
1 changed files with 13 additions and 27 deletions
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40
drivers/crypto/atmel-tdes.c
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@ -349,20 +349,9 @@ static void atmel_tdes_buff_cleanup(struct atmel_tdes_dev *dd)
static int atmel_tdes_crypt_pdc(struct atmel_tdes_dev *dd,
dma_addr_t dma_addr_in,
dma_addr_t dma_addr_out, int length)
dma_addr_t dma_addr_out)
{
int len32;
dd->dma_size = length;
if (!(dd->flags & TDES_FLAGS_FAST)) {
dma_sync_single_for_device(dd->dev, dma_addr_in, length,
DMA_TO_DEVICE);
dma_sync_single_for_device(dd->dev, dma_addr_out, length,
DMA_FROM_DEVICE);
}
len32 = DIV_ROUND_UP(length, sizeof(u32));
u32 len32 = DIV_ROUND_UP(dd->dma_size, sizeof(u32));
atmel_tdes_write(dd, TDES_PTCR, TDES_PTCR_TXTDIS|TDES_PTCR_RXTDIS);
atmel_tdes_write(dd, TDES_TPR, dma_addr_in);
@ -381,21 +370,12 @@ static int atmel_tdes_crypt_pdc(struct atmel_tdes_dev *dd,
static int atmel_tdes_crypt_dma(struct atmel_tdes_dev *dd,
dma_addr_t dma_addr_in,
dma_addr_t dma_addr_out, int length)
dma_addr_t dma_addr_out)
{
struct scatterlist sg[2];
struct dma_async_tx_descriptor *in_desc, *out_desc;
enum dma_slave_buswidth addr_width;
dd->dma_size = length;
if (!(dd->flags & TDES_FLAGS_FAST)) {
dma_sync_single_for_device(dd->dev, dma_addr_in, length,
DMA_TO_DEVICE);
dma_sync_single_for_device(dd->dev, dma_addr_out, length,
DMA_FROM_DEVICE);
}
addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES;
dd->dma_lch_in.dma_conf.dst_addr_width = addr_width;
@ -408,11 +388,11 @@ static int atmel_tdes_crypt_dma(struct atmel_tdes_dev *dd,
sg_init_table(&sg[0], 1);
sg_dma_address(&sg[0]) = dma_addr_in;
sg_dma_len(&sg[0]) = length;
sg_dma_len(&sg[0]) = dd->dma_size;
sg_init_table(&sg[1], 1);
sg_dma_address(&sg[1]) = dma_addr_out;
sg_dma_len(&sg[1]) = length;
sg_dma_len(&sg[1]) = dd->dma_size;
in_desc = dmaengine_prep_slave_sg(dd->dma_lch_in.chan, &sg[0],
1, DMA_MEM_TO_DEV,
@ -486,11 +466,17 @@ static int atmel_tdes_crypt_start(struct atmel_tdes_dev *dd)
}
dd->total -= count;
dd->dma_size = count;
if (!fast) {
dma_sync_single_for_device(dd->dev, addr_in, dd->dma_size, DMA_TO_DEVICE);
dma_sync_single_for_device(dd->dev, addr_out, dd->dma_size, DMA_FROM_DEVICE);
}
if (dd->caps.has_dma)
err = atmel_tdes_crypt_dma(dd, addr_in, addr_out, count);
err = atmel_tdes_crypt_dma(dd, addr_in, addr_out);
else
err = atmel_tdes_crypt_pdc(dd, addr_in, addr_out, count);
err = atmel_tdes_crypt_pdc(dd, addr_in, addr_out);
if (err && (dd->flags & TDES_FLAGS_FAST)) {
dma_unmap_sg(dd->dev, dd->in_sg, 1, DMA_TO_DEVICE);