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crypto: atmel-tdes - Map driver data flags to Mode Register 

Simplifies the configuration of the TDES IP.

Signed-off-by: Tudor Ambarus <tudor.ambarus@microchip.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Tudor Ambarus 2019-12-05 09:53:56 +00:00 committed by Herbert Xu
parent 7d0979e2df
commit 848572f817
1 changed files with 70 additions and 72 deletions
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142
drivers/crypto/atmel-tdes.c
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@ -40,20 +40,23 @@
#define ATMEL_TDES_PRIORITY 300
/* TDES flags */
#define TDES_FLAGS_MODE_MASK 0x00ff
#define TDES_FLAGS_ENCRYPT BIT(0)
#define TDES_FLAGS_CBC BIT(1)
#define TDES_FLAGS_CFB BIT(2)
#define TDES_FLAGS_CFB8 BIT(3)
#define TDES_FLAGS_CFB16 BIT(4)
#define TDES_FLAGS_CFB32 BIT(5)
#define TDES_FLAGS_CFB64 BIT(6)
#define TDES_FLAGS_OFB BIT(7)
/* Reserve bits [17:16], [13:12], [2:0] for AES Mode Register */
#define TDES_FLAGS_ENCRYPT TDES_MR_CYPHER_ENC
#define TDES_FLAGS_OPMODE_MASK (TDES_MR_OPMOD_MASK | TDES_MR_CFBS_MASK)
#define TDES_FLAGS_ECB TDES_MR_OPMOD_ECB
#define TDES_FLAGS_CBC TDES_MR_OPMOD_CBC
#define TDES_FLAGS_OFB TDES_MR_OPMOD_OFB
#define TDES_FLAGS_CFB64 (TDES_MR_OPMOD_CFB | TDES_MR_CFBS_64b)
#define TDES_FLAGS_CFB32 (TDES_MR_OPMOD_CFB | TDES_MR_CFBS_32b)
#define TDES_FLAGS_CFB16 (TDES_MR_OPMOD_CFB | TDES_MR_CFBS_16b)
#define TDES_FLAGS_CFB8 (TDES_MR_OPMOD_CFB | TDES_MR_CFBS_8b)
#define TDES_FLAGS_INIT BIT(16)
#define TDES_FLAGS_FAST BIT(17)
#define TDES_FLAGS_BUSY BIT(18)
#define TDES_FLAGS_DMA BIT(19)
#define TDES_FLAGS_MODE_MASK (TDES_FLAGS_OPMODE_MASK | TDES_FLAGS_ENCRYPT)
#define TDES_FLAGS_INIT BIT(3)
#define TDES_FLAGS_FAST BIT(4)
#define TDES_FLAGS_BUSY BIT(5)
#define TDES_FLAGS_DMA BIT(6)
#define ATMEL_TDES_QUEUE_LENGTH 50
@ -287,35 +290,15 @@ static int atmel_tdes_write_ctrl(struct atmel_tdes_dev *dd)
valmr |= TDES_MR_TDESMOD_DES;
}
if (dd->flags & TDES_FLAGS_CBC) {
valmr |= TDES_MR_OPMOD_CBC;
} else if (dd->flags & TDES_FLAGS_CFB) {
valmr |= TDES_MR_OPMOD_CFB;
if (dd->flags & TDES_FLAGS_CFB8)
valmr |= TDES_MR_CFBS_8b;
else if (dd->flags & TDES_FLAGS_CFB16)
valmr |= TDES_MR_CFBS_16b;
else if (dd->flags & TDES_FLAGS_CFB32)
valmr |= TDES_MR_CFBS_32b;
else if (dd->flags & TDES_FLAGS_CFB64)
valmr |= TDES_MR_CFBS_64b;
} else if (dd->flags & TDES_FLAGS_OFB) {
valmr |= TDES_MR_OPMOD_OFB;
}
if ((dd->flags & TDES_FLAGS_ENCRYPT) || (dd->flags & TDES_FLAGS_OFB))
valmr |= TDES_MR_CYPHER_ENC;
valmr |= dd->flags & TDES_FLAGS_MODE_MASK;
atmel_tdes_write(dd, TDES_MR, valmr);
atmel_tdes_write_n(dd, TDES_KEY1W1R, dd->ctx->key,
dd->ctx->keylen >> 2);
if (((dd->flags & TDES_FLAGS_CBC) || (dd->flags & TDES_FLAGS_CFB) ||
(dd->flags & TDES_FLAGS_OFB)) && dd->req->iv) {
if (dd->req->iv && (valmr & TDES_MR_OPMOD_MASK) != TDES_MR_OPMOD_ECB)
atmel_tdes_write_n(dd, TDES_IV1R, (void *)dd->req->iv, 2);
}
return 0;
}
@ -406,6 +389,7 @@ static int atmel_tdes_crypt_pdc(struct crypto_tfm *tfm, dma_addr_t dma_addr_in,
{
struct atmel_tdes_ctx *ctx = crypto_tfm_ctx(tfm);
struct atmel_tdes_dev *dd = ctx->dd;
struct atmel_tdes_reqctx *rctx = skcipher_request_ctx(dd->req);
int len32;
dd->dma_size = length;
@ -415,12 +399,19 @@ static int atmel_tdes_crypt_pdc(struct crypto_tfm *tfm, dma_addr_t dma_addr_in,
DMA_TO_DEVICE);
}
if ((dd->flags & TDES_FLAGS_CFB) && (dd->flags & TDES_FLAGS_CFB8))
switch (rctx->mode & TDES_FLAGS_OPMODE_MASK) {
case TDES_FLAGS_CFB8:
len32 = DIV_ROUND_UP(length, sizeof(u8));
else if ((dd->flags & TDES_FLAGS_CFB) && (dd->flags & TDES_FLAGS_CFB16))
break;
case TDES_FLAGS_CFB16:
len32 = DIV_ROUND_UP(length, sizeof(u16));
else
break;
default:
len32 = DIV_ROUND_UP(length, sizeof(u32));
break;
}
atmel_tdes_write(dd, TDES_PTCR, TDES_PTCR_TXTDIS|TDES_PTCR_RXTDIS);
atmel_tdes_write(dd, TDES_TPR, dma_addr_in);
@ -442,8 +433,10 @@ static int atmel_tdes_crypt_dma(struct crypto_tfm *tfm, dma_addr_t dma_addr_in,
{
struct atmel_tdes_ctx *ctx = crypto_tfm_ctx(tfm);
struct atmel_tdes_dev *dd = ctx->dd;
struct atmel_tdes_reqctx *rctx = skcipher_request_ctx(dd->req);
struct scatterlist sg[2];
struct dma_async_tx_descriptor *in_desc, *out_desc;
enum dma_slave_buswidth addr_width;
dd->dma_size = length;
@ -452,23 +445,23 @@ static int atmel_tdes_crypt_dma(struct crypto_tfm *tfm, dma_addr_t dma_addr_in,
DMA_TO_DEVICE);
}
if (dd->flags & TDES_FLAGS_CFB8) {
dd->dma_lch_in.dma_conf.dst_addr_width =
DMA_SLAVE_BUSWIDTH_1_BYTE;
dd->dma_lch_out.dma_conf.src_addr_width =
DMA_SLAVE_BUSWIDTH_1_BYTE;
} else if (dd->flags & TDES_FLAGS_CFB16) {
dd->dma_lch_in.dma_conf.dst_addr_width =
DMA_SLAVE_BUSWIDTH_2_BYTES;
dd->dma_lch_out.dma_conf.src_addr_width =
DMA_SLAVE_BUSWIDTH_2_BYTES;
} else {
dd->dma_lch_in.dma_conf.dst_addr_width =
DMA_SLAVE_BUSWIDTH_4_BYTES;
dd->dma_lch_out.dma_conf.src_addr_width =
DMA_SLAVE_BUSWIDTH_4_BYTES;
switch (rctx->mode & TDES_FLAGS_OPMODE_MASK) {
case TDES_FLAGS_CFB8:
addr_width = DMA_SLAVE_BUSWIDTH_1_BYTE;
break;
case TDES_FLAGS_CFB16:
addr_width = DMA_SLAVE_BUSWIDTH_2_BYTES;
break;
default:
addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES;
break;
}
dd->dma_lch_in.dma_conf.dst_addr_width = addr_width;
dd->dma_lch_out.dma_conf.src_addr_width = addr_width;
dmaengine_slave_config(dd->dma_lch_in.chan, &dd->dma_lch_in.dma_conf);
dmaengine_slave_config(dd->dma_lch_out.chan, &dd->dma_lch_out.dma_conf);
@ -703,30 +696,38 @@ static int atmel_tdes_crypt(struct skcipher_request *req, unsigned long mode)
struct atmel_tdes_ctx *ctx = crypto_skcipher_ctx(skcipher);
struct atmel_tdes_reqctx *rctx = skcipher_request_ctx(req);
if (mode & TDES_FLAGS_CFB8) {
switch (mode & TDES_FLAGS_OPMODE_MASK) {
case TDES_FLAGS_CFB8:
if (!IS_ALIGNED(req->cryptlen, CFB8_BLOCK_SIZE)) {
pr_err("request size is not exact amount of CFB8 blocks\n");
return -EINVAL;
}
ctx->block_size = CFB8_BLOCK_SIZE;
} else if (mode & TDES_FLAGS_CFB16) {
break;
case TDES_FLAGS_CFB16:
if (!IS_ALIGNED(req->cryptlen, CFB16_BLOCK_SIZE)) {
pr_err("request size is not exact amount of CFB16 blocks\n");
return -EINVAL;
}
ctx->block_size = CFB16_BLOCK_SIZE;
} else if (mode & TDES_FLAGS_CFB32) {
break;
case TDES_FLAGS_CFB32:
if (!IS_ALIGNED(req->cryptlen, CFB32_BLOCK_SIZE)) {
pr_err("request size is not exact amount of CFB32 blocks\n");
return -EINVAL;
}
ctx->block_size = CFB32_BLOCK_SIZE;
} else {
break;
default:
if (!IS_ALIGNED(req->cryptlen, DES_BLOCK_SIZE)) {
pr_err("request size is not exact amount of DES blocks\n");
return -EINVAL;
}
ctx->block_size = DES_BLOCK_SIZE;
break;
}
rctx->mode = mode;
@ -833,17 +834,17 @@ static int atmel_tdes_setkey(struct crypto_skcipher *tfm, const u8 *key,
static int atmel_tdes_ecb_encrypt(struct skcipher_request *req)
{
return atmel_tdes_crypt(req, TDES_FLAGS_ENCRYPT);
return atmel_tdes_crypt(req, TDES_FLAGS_ECB | TDES_FLAGS_ENCRYPT);
}
static int atmel_tdes_ecb_decrypt(struct skcipher_request *req)
{
return atmel_tdes_crypt(req, 0);
return atmel_tdes_crypt(req, TDES_FLAGS_ECB);
}
static int atmel_tdes_cbc_encrypt(struct skcipher_request *req)
{
return atmel_tdes_crypt(req, TDES_FLAGS_ENCRYPT | TDES_FLAGS_CBC);
return atmel_tdes_crypt(req, TDES_FLAGS_CBC | TDES_FLAGS_ENCRYPT);
}
static int atmel_tdes_cbc_decrypt(struct skcipher_request *req)
@ -852,50 +853,47 @@ static int atmel_tdes_cbc_decrypt(struct skcipher_request *req)
}
static int atmel_tdes_cfb_encrypt(struct skcipher_request *req)
{
return atmel_tdes_crypt(req, TDES_FLAGS_ENCRYPT | TDES_FLAGS_CFB);
return atmel_tdes_crypt(req, TDES_FLAGS_CFB64 | TDES_FLAGS_ENCRYPT);
}
static int atmel_tdes_cfb_decrypt(struct skcipher_request *req)
{
return atmel_tdes_crypt(req, TDES_FLAGS_CFB);
return atmel_tdes_crypt(req, TDES_FLAGS_CFB64);
}
static int atmel_tdes_cfb8_encrypt(struct skcipher_request *req)
{
return atmel_tdes_crypt(req, TDES_FLAGS_ENCRYPT | TDES_FLAGS_CFB |
TDES_FLAGS_CFB8);
return atmel_tdes_crypt(req, TDES_FLAGS_CFB8 | TDES_FLAGS_ENCRYPT);
}
static int atmel_tdes_cfb8_decrypt(struct skcipher_request *req)
{
return atmel_tdes_crypt(req, TDES_FLAGS_CFB | TDES_FLAGS_CFB8);
return atmel_tdes_crypt(req, TDES_FLAGS_CFB8);
}
static int atmel_tdes_cfb16_encrypt(struct skcipher_request *req)
{
return atmel_tdes_crypt(req, TDES_FLAGS_ENCRYPT | TDES_FLAGS_CFB |
TDES_FLAGS_CFB16);
return atmel_tdes_crypt(req, TDES_FLAGS_CFB16 | TDES_FLAGS_ENCRYPT);
}
static int atmel_tdes_cfb16_decrypt(struct skcipher_request *req)
{
return atmel_tdes_crypt(req, TDES_FLAGS_CFB | TDES_FLAGS_CFB16);
return atmel_tdes_crypt(req, TDES_FLAGS_CFB16);
}
static int atmel_tdes_cfb32_encrypt(struct skcipher_request *req)
{
return atmel_tdes_crypt(req, TDES_FLAGS_ENCRYPT | TDES_FLAGS_CFB |
TDES_FLAGS_CFB32);
return atmel_tdes_crypt(req, TDES_FLAGS_CFB32 | TDES_FLAGS_ENCRYPT);
}
static int atmel_tdes_cfb32_decrypt(struct skcipher_request *req)
{
return atmel_tdes_crypt(req, TDES_FLAGS_CFB | TDES_FLAGS_CFB32);
return atmel_tdes_crypt(req, TDES_FLAGS_CFB32);
}
static int atmel_tdes_ofb_encrypt(struct skcipher_request *req)
{
return atmel_tdes_crypt(req, TDES_FLAGS_ENCRYPT | TDES_FLAGS_OFB);
return atmel_tdes_crypt(req, TDES_FLAGS_OFB | TDES_FLAGS_ENCRYPT);
}
static int atmel_tdes_ofb_decrypt(struct skcipher_request *req)