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crypto: atmel-sha - add support for latest release of the IP (0x410)

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Updates from IP release 0x320 to 0x400:
 - add DMA support (previous IP revision use PDC)
 - add DMA double input buffer support
 - add SHA224 support

Update from IP release 0x400 to 0x410:
 - add SHA384 and SHA512 support

Signed-off-by: Nicolas Royer <nicolas@eukrea.com>
Acked-by: Nicolas Ferre <nicolas.ferre@atmel.com>
Acked-by: Eric Bénard <eric@eukrea.com>
Tested-by: Eric Bénard <eric@eukrea.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Nicolas Royer 2013-02-20 17:10:26 +01:00 committed by Herbert Xu
parent 1f858040c2
commit d4905b38d1
3 changed files with 495 additions and 102 deletions
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8
drivers/crypto/Kconfig
View File

@ -361,15 +361,17 @@ config CRYPTO_DEV_ATMEL_TDES
will be called atmel-tdes.
config CRYPTO_DEV_ATMEL_SHA
tristate "Support for Atmel SHA1/SHA256 hw accelerator"
tristate "Support for Atmel SHA hw accelerator"
depends on ARCH_AT91
select CRYPTO_SHA1
select CRYPTO_SHA256
select CRYPTO_SHA512
select CRYPTO_ALGAPI
help
Some Atmel processors have SHA1/SHA256 hw accelerator.
Some Atmel processors have SHA1/SHA224/SHA256/SHA384/SHA512
hw accelerator.
Select this if you want to use the Atmel module for
SHA1/SHA256 algorithms.
SHA1/SHA224/SHA256/SHA384/SHA512 algorithms.
To compile this driver as a module, choose M here: the module
will be called atmel-sha.

7
drivers/crypto/atmel-sha-regs.h
View File

@ -14,10 +14,13 @@
#define SHA_MR_MODE_MANUAL 0x0
#define SHA_MR_MODE_AUTO 0x1
#define SHA_MR_MODE_PDC 0x2
#define SHA_MR_DUALBUFF (1 << 3)
#define SHA_MR_PROCDLY (1 << 4)
#define SHA_MR_ALGO_SHA1 (0 << 8)
#define SHA_MR_ALGO_SHA256 (1 << 8)
#define SHA_MR_ALGO_SHA384 (2 << 8)
#define SHA_MR_ALGO_SHA512 (3 << 8)
#define SHA_MR_ALGO_SHA224 (4 << 8)
#define SHA_MR_DUALBUFF (1 << 16)
#define SHA_IER 0x10
#define SHA_IDR 0x14
@ -33,6 +36,8 @@
#define SHA_ISR_URAT_MR (0x2 << 12)
#define SHA_ISR_URAT_WO (0x5 << 12)
#define SHA_HW_VERSION 0xFC
#define SHA_TPR 0x108
#define SHA_TCR 0x10C
#define SHA_TNPR 0x118

582
drivers/crypto/atmel-sha.c
View File

@ -38,6 +38,7 @@
#include <crypto/sha.h>
#include <crypto/hash.h>
#include <crypto/internal/hash.h>
#include <linux/platform_data/crypto-atmel.h>
#include "atmel-sha-regs.h"
/* SHA flags */
@ -52,11 +53,12 @@
#define SHA_FLAGS_FINUP BIT(16)
#define SHA_FLAGS_SG BIT(17)
#define SHA_FLAGS_SHA1 BIT(18)
#define SHA_FLAGS_SHA256 BIT(19)
#define SHA_FLAGS_ERROR BIT(20)
#define SHA_FLAGS_PAD BIT(21)
#define SHA_FLAGS_DUALBUFF BIT(24)
#define SHA_FLAGS_SHA224 BIT(19)
#define SHA_FLAGS_SHA256 BIT(20)
#define SHA_FLAGS_SHA384 BIT(21)
#define SHA_FLAGS_SHA512 BIT(22)
#define SHA_FLAGS_ERROR BIT(23)
#define SHA_FLAGS_PAD BIT(24)
#define SHA_OP_UPDATE 1
#define SHA_OP_FINAL 2
@ -65,6 +67,12 @@
#define ATMEL_SHA_DMA_THRESHOLD 56
struct atmel_sha_caps {
bool has_dma;
bool has_dualbuff;
bool has_sha224;
bool has_sha_384_512;
};
struct atmel_sha_dev;
@ -73,8 +81,8 @@ struct atmel_sha_reqctx {
unsigned long flags;
unsigned long op;
u8 digest[SHA256_DIGEST_SIZE] __aligned(sizeof(u32));
size_t digcnt;
u8 digest[SHA512_DIGEST_SIZE] __aligned(sizeof(u32));
u64 digcnt[2];
size_t bufcnt;
size_t buflen;
dma_addr_t dma_addr;
@ -84,6 +92,8 @@ struct atmel_sha_reqctx {
unsigned int offset; /* offset in current sg */
unsigned int total; /* total request */
size_t block_size;
u8 buffer[0] __aligned(sizeof(u32));
};
@ -97,7 +107,12 @@ struct atmel_sha_ctx {
};
#define ATMEL_SHA_QUEUE_LENGTH 1
#define ATMEL_SHA_QUEUE_LENGTH 50
struct atmel_sha_dma {
struct dma_chan *chan;
struct dma_slave_config dma_conf;
};
struct atmel_sha_dev {
struct list_head list;
@ -114,6 +129,12 @@ struct atmel_sha_dev {
unsigned long flags;
struct crypto_queue queue;
struct ahash_request *req;
struct atmel_sha_dma dma_lch_in;
struct atmel_sha_caps caps;
u32 hw_version;
};
struct atmel_sha_drv {
@ -137,14 +158,6 @@ static inline void atmel_sha_write(struct atmel_sha_dev *dd,
writel_relaxed(value, dd->io_base + offset);
}
static void atmel_sha_dualbuff_test(struct atmel_sha_dev *dd)
{
atmel_sha_write(dd, SHA_MR, SHA_MR_DUALBUFF);
if (atmel_sha_read(dd, SHA_MR) & SHA_MR_DUALBUFF)
dd->flags |= SHA_FLAGS_DUALBUFF;
}
static size_t atmel_sha_append_sg(struct atmel_sha_reqctx *ctx)
{
size_t count;
@ -176,31 +189,58 @@ static size_t atmel_sha_append_sg(struct atmel_sha_reqctx *ctx)
}
/*
* The purpose of this padding is to ensure that the padded message
* is a multiple of 512 bits. The bit "1" is appended at the end of
* the message followed by "padlen-1" zero bits. Then a 64 bits block
* equals to the message length in bits is appended.
* The purpose of this padding is to ensure that the padded message is a
* multiple of 512 bits (SHA1/SHA224/SHA256) or 1024 bits (SHA384/SHA512).
* The bit "1" is appended at the end of the message followed by
* "padlen-1" zero bits. Then a 64 bits block (SHA1/SHA224/SHA256) or
* 128 bits block (SHA384/SHA512) equals to the message length in bits
* is appended.
*
* padlen is calculated as followed:
* For SHA1/SHA224/SHA256, padlen is calculated as followed:
* - if message length < 56 bytes then padlen = 56 - message length
* - else padlen = 64 + 56 - message length
*
* For SHA384/SHA512, padlen is calculated as followed:
* - if message length < 112 bytes then padlen = 112 - message length
* - else padlen = 128 + 112 - message length
*/
static void atmel_sha_fill_padding(struct atmel_sha_reqctx *ctx, int length)
{
unsigned int index, padlen;
u64 bits;
u64 size;
u64 bits[2];
u64 size[2];
bits = (ctx->bufcnt + ctx->digcnt + length) << 3;
size = cpu_to_be64(bits);
size[0] = ctx->digcnt[0];
size[1] = ctx->digcnt[1];
index = ctx->bufcnt & 0x3f;
padlen = (index < 56) ? (56 - index) : ((64+56) - index);
*(ctx->buffer + ctx->bufcnt) = 0x80;
memset(ctx->buffer + ctx->bufcnt + 1, 0, padlen-1);
memcpy(ctx->buffer + ctx->bufcnt + padlen, &size, 8);
ctx->bufcnt += padlen + 8;
ctx->flags |= SHA_FLAGS_PAD;
size[0] += ctx->bufcnt;
if (size[0] < ctx->bufcnt)
size[1]++;
size[0] += length;
if (size[0] < length)
size[1]++;
bits[1] = cpu_to_be64(size[0] << 3);
bits[0] = cpu_to_be64(size[1] << 3 | size[0] >> 61);
if (ctx->flags & (SHA_FLAGS_SHA384 | SHA_FLAGS_SHA512)) {
index = ctx->bufcnt & 0x7f;
padlen = (index < 112) ? (112 - index) : ((128+112) - index);
*(ctx->buffer + ctx->bufcnt) = 0x80;
memset(ctx->buffer + ctx->bufcnt + 1, 0, padlen-1);
memcpy(ctx->buffer + ctx->bufcnt + padlen, bits, 16);
ctx->bufcnt += padlen + 16;
ctx->flags |= SHA_FLAGS_PAD;
} else {
index = ctx->bufcnt & 0x3f;
padlen = (index < 56) ? (56 - index) : ((64+56) - index);
*(ctx->buffer + ctx->bufcnt) = 0x80;
memset(ctx->buffer + ctx->bufcnt + 1, 0, padlen-1);
memcpy(ctx->buffer + ctx->bufcnt + padlen, &bits[1], 8);
ctx->bufcnt += padlen + 8;
ctx->flags |= SHA_FLAGS_PAD;
}
}
static int atmel_sha_init(struct ahash_request *req)
@ -231,13 +271,35 @@ static int atmel_sha_init(struct ahash_request *req)
dev_dbg(dd->dev, "init: digest size: %d\n",
crypto_ahash_digestsize(tfm));
if (crypto_ahash_digestsize(tfm) == SHA1_DIGEST_SIZE)
switch (crypto_ahash_digestsize(tfm)) {
case SHA1_DIGEST_SIZE:
ctx->flags |= SHA_FLAGS_SHA1;
else if (crypto_ahash_digestsize(tfm) == SHA256_DIGEST_SIZE)
ctx->block_size = SHA1_BLOCK_SIZE;
break;
case SHA224_DIGEST_SIZE:
ctx->flags |= SHA_FLAGS_SHA224;
ctx->block_size = SHA224_BLOCK_SIZE;
break;
case SHA256_DIGEST_SIZE:
ctx->flags |= SHA_FLAGS_SHA256;
ctx->block_size = SHA256_BLOCK_SIZE;
break;
case SHA384_DIGEST_SIZE:
ctx->flags |= SHA_FLAGS_SHA384;
ctx->block_size = SHA384_BLOCK_SIZE;
break;
case SHA512_DIGEST_SIZE:
ctx->flags |= SHA_FLAGS_SHA512;
ctx->block_size = SHA512_BLOCK_SIZE;
break;
default:
return -EINVAL;
break;
}
ctx->bufcnt = 0;
ctx->digcnt = 0;
ctx->digcnt[0] = 0;
ctx->digcnt[1] = 0;
ctx->buflen = SHA_BUFFER_LEN;
return 0;
@ -249,19 +311,28 @@ static void atmel_sha_write_ctrl(struct atmel_sha_dev *dd, int dma)
u32 valcr = 0, valmr = SHA_MR_MODE_AUTO;
if (likely(dma)) {
atmel_sha_write(dd, SHA_IER, SHA_INT_TXBUFE);
if (!dd->caps.has_dma)
atmel_sha_write(dd, SHA_IER, SHA_INT_TXBUFE);
valmr = SHA_MR_MODE_PDC;
if (dd->flags & SHA_FLAGS_DUALBUFF)
valmr = SHA_MR_DUALBUFF;
if (dd->caps.has_dualbuff)
valmr |= SHA_MR_DUALBUFF;
} else {
atmel_sha_write(dd, SHA_IER, SHA_INT_DATARDY);
}
if (ctx->flags & SHA_FLAGS_SHA256)
if (ctx->flags & SHA_FLAGS_SHA1)
valmr |= SHA_MR_ALGO_SHA1;
else if (ctx->flags & SHA_FLAGS_SHA224)
valmr |= SHA_MR_ALGO_SHA224;
else if (ctx->flags & SHA_FLAGS_SHA256)
valmr |= SHA_MR_ALGO_SHA256;
else if (ctx->flags & SHA_FLAGS_SHA384)
valmr |= SHA_MR_ALGO_SHA384;
else if (ctx->flags & SHA_FLAGS_SHA512)
valmr |= SHA_MR_ALGO_SHA512;
/* Setting CR_FIRST only for the first iteration */
if (!ctx->digcnt)
if (!(ctx->digcnt[0] || ctx->digcnt[1]))
valcr = SHA_CR_FIRST;
atmel_sha_write(dd, SHA_CR, valcr);
@ -275,13 +346,15 @@ static int atmel_sha_xmit_cpu(struct atmel_sha_dev *dd, const u8 *buf,
int count, len32;
const u32 *buffer = (const u32 *)buf;
dev_dbg(dd->dev, "xmit_cpu: digcnt: %d, length: %d, final: %d\n",
ctx->digcnt, length, final);
dev_dbg(dd->dev, "xmit_cpu: digcnt: 0x%llx 0x%llx, length: %d, final: %d\n",
ctx->digcnt[1], ctx->digcnt[0], length, final);
atmel_sha_write_ctrl(dd, 0);
/* should be non-zero before next lines to disable clocks later */
ctx->digcnt += length;
ctx->digcnt[0] += length;
if (ctx->digcnt[0] < length)
ctx->digcnt[1]++;
if (final)
dd->flags |= SHA_FLAGS_FINAL; /* catch last interrupt */
@ -302,8 +375,8 @@ static int atmel_sha_xmit_pdc(struct atmel_sha_dev *dd, dma_addr_t dma_addr1,
struct atmel_sha_reqctx *ctx = ahash_request_ctx(dd->req);
int len32;
dev_dbg(dd->dev, "xmit_pdc: digcnt: %d, length: %d, final: %d\n",
ctx->digcnt, length1, final);
dev_dbg(dd->dev, "xmit_pdc: digcnt: 0x%llx 0x%llx, length: %d, final: %d\n",
ctx->digcnt[1], ctx->digcnt[0], length1, final);
len32 = DIV_ROUND_UP(length1, sizeof(u32));
atmel_sha_write(dd, SHA_PTCR, SHA_PTCR_TXTDIS);
@ -317,7 +390,9 @@ static int atmel_sha_xmit_pdc(struct atmel_sha_dev *dd, dma_addr_t dma_addr1,
atmel_sha_write_ctrl(dd, 1);
/* should be non-zero before next lines to disable clocks later */
ctx->digcnt += length1;
ctx->digcnt[0] += length1;
if (ctx->digcnt[0] < length1)
ctx->digcnt[1]++;
if (final)
dd->flags |= SHA_FLAGS_FINAL; /* catch last interrupt */
@ -330,6 +405,86 @@ static int atmel_sha_xmit_pdc(struct atmel_sha_dev *dd, dma_addr_t dma_addr1,
return -EINPROGRESS;
}
static void atmel_sha_dma_callback(void *data)
{
struct atmel_sha_dev *dd = data;
/* dma_lch_in - completed - wait DATRDY */
atmel_sha_write(dd, SHA_IER, SHA_INT_DATARDY);
}
static int atmel_sha_xmit_dma(struct atmel_sha_dev *dd, dma_addr_t dma_addr1,
size_t length1, dma_addr_t dma_addr2, size_t length2, int final)
{
struct atmel_sha_reqctx *ctx = ahash_request_ctx(dd->req);
struct dma_async_tx_descriptor *in_desc;
struct scatterlist sg[2];
dev_dbg(dd->dev, "xmit_dma: digcnt: 0x%llx 0x%llx, length: %d, final: %d\n",
ctx->digcnt[1], ctx->digcnt[0], length1, final);
if (ctx->flags & (SHA_FLAGS_SHA1 | SHA_FLAGS_SHA224 |
SHA_FLAGS_SHA256)) {
dd->dma_lch_in.dma_conf.src_maxburst = 16;
dd->dma_lch_in.dma_conf.dst_maxburst = 16;
} else {
dd->dma_lch_in.dma_conf.src_maxburst = 32;
dd->dma_lch_in.dma_conf.dst_maxburst = 32;
}
dmaengine_slave_config(dd->dma_lch_in.chan, &dd->dma_lch_in.dma_conf);
if (length2) {
sg_init_table(sg, 2);
sg_dma_address(&sg[0]) = dma_addr1;
sg_dma_len(&sg[0]) = length1;
sg_dma_address(&sg[1]) = dma_addr2;
sg_dma_len(&sg[1]) = length2;
in_desc = dmaengine_prep_slave_sg(dd->dma_lch_in.chan, sg, 2,
DMA_MEM_TO_DEV, DMA_PREP_INTERRUPT | DMA_CTRL_ACK);
} else {
sg_init_table(sg, 1);
sg_dma_address(&sg[0]) = dma_addr1;
sg_dma_len(&sg[0]) = length1;
in_desc = dmaengine_prep_slave_sg(dd->dma_lch_in.chan, sg, 1,
DMA_MEM_TO_DEV, DMA_PREP_INTERRUPT | DMA_CTRL_ACK);
}
if (!in_desc)
return -EINVAL;
in_desc->callback = atmel_sha_dma_callback;
in_desc->callback_param = dd;
atmel_sha_write_ctrl(dd, 1);
/* should be non-zero before next lines to disable clocks later */
ctx->digcnt[0] += length1;
if (ctx->digcnt[0] < length1)
ctx->digcnt[1]++;
if (final)
dd->flags |= SHA_FLAGS_FINAL; /* catch last interrupt */
dd->flags |= SHA_FLAGS_DMA_ACTIVE;
/* Start DMA transfer */
dmaengine_submit(in_desc);
dma_async_issue_pending(dd->dma_lch_in.chan);
return -EINPROGRESS;
}
static int atmel_sha_xmit_start(struct atmel_sha_dev *dd, dma_addr_t dma_addr1,
size_t length1, dma_addr_t dma_addr2, size_t length2, int final)
{
if (dd->caps.has_dma)
return atmel_sha_xmit_dma(dd, dma_addr1, length1,
dma_addr2, length2, final);
else
return atmel_sha_xmit_pdc(dd, dma_addr1, length1,
dma_addr2, length2, final);
}
static int atmel_sha_update_cpu(struct atmel_sha_dev *dd)
{
struct atmel_sha_reqctx *ctx = ahash_request_ctx(dd->req);
@ -337,7 +492,6 @@ static int atmel_sha_update_cpu(struct atmel_sha_dev *dd)
atmel_sha_append_sg(ctx);
atmel_sha_fill_padding(ctx, 0);
bufcnt = ctx->bufcnt;
ctx->bufcnt = 0;
@ -349,17 +503,17 @@ static int atmel_sha_xmit_dma_map(struct atmel_sha_dev *dd,
size_t length, int final)
{
ctx->dma_addr = dma_map_single(dd->dev, ctx->buffer,
ctx->buflen + SHA1_BLOCK_SIZE, DMA_TO_DEVICE);
ctx->buflen + ctx->block_size, DMA_TO_DEVICE);
if (dma_mapping_error(dd->dev, ctx->dma_addr)) {
dev_err(dd->dev, "dma %u bytes error\n", ctx->buflen +
SHA1_BLOCK_SIZE);
ctx->block_size);
return -EINVAL;
}
ctx->flags &= ~SHA_FLAGS_SG;
/* next call does not fail... so no unmap in the case of error */
return atmel_sha_xmit_pdc(dd, ctx->dma_addr, length, 0, 0, final);
return atmel_sha_xmit_start(dd, ctx->dma_addr, length, 0, 0, final);
}
static int atmel_sha_update_dma_slow(struct atmel_sha_dev *dd)
@ -372,8 +526,8 @@ static int atmel_sha_update_dma_slow(struct atmel_sha_dev *dd)
final = (ctx->flags & SHA_FLAGS_FINUP) && !ctx->total;
dev_dbg(dd->dev, "slow: bufcnt: %u, digcnt: %d, final: %d\n",
ctx->bufcnt, ctx->digcnt, final);
dev_dbg(dd->dev, "slow: bufcnt: %u, digcnt: 0x%llx 0x%llx, final: %d\n",
ctx->bufcnt, ctx->digcnt[1], ctx->digcnt[0], final);
if (final)
atmel_sha_fill_padding(ctx, 0);
@ -400,30 +554,25 @@ static int atmel_sha_update_dma_start(struct atmel_sha_dev *dd)
if (ctx->bufcnt || ctx->offset)
return atmel_sha_update_dma_slow(dd);
dev_dbg(dd->dev, "fast: digcnt: %d, bufcnt: %u, total: %u\n",
ctx->digcnt, ctx->bufcnt, ctx->total);
dev_dbg(dd->dev, "fast: digcnt: 0x%llx 0x%llx, bufcnt: %u, total: %u\n",
ctx->digcnt[1], ctx->digcnt[0], ctx->bufcnt, ctx->total);
sg = ctx->sg;
if (!IS_ALIGNED(sg->offset, sizeof(u32)))
return atmel_sha_update_dma_slow(dd);
if (!sg_is_last(sg) && !IS_ALIGNED(sg->length, SHA1_BLOCK_SIZE))
/* size is not SHA1_BLOCK_SIZE aligned */
if (!sg_is_last(sg) && !IS_ALIGNED(sg->length, ctx->block_size))
/* size is not ctx->block_size aligned */
return atmel_sha_update_dma_slow(dd);
length = min(ctx->total, sg->length);
if (sg_is_last(sg)) {
if (!(ctx->flags & SHA_FLAGS_FINUP)) {
/* not last sg must be SHA1_BLOCK_SIZE aligned */
tail = length & (SHA1_BLOCK_SIZE - 1);
/* not last sg must be ctx->block_size aligned */
tail = length & (ctx->block_size - 1);
length -= tail;
if (length == 0) {
/* offset where to start slow */
ctx->offset = length;
return atmel_sha_update_dma_slow(dd);
}
}
}
@ -434,7 +583,7 @@ static int atmel_sha_update_dma_start(struct atmel_sha_dev *dd)
/* Add padding */
if (final) {
tail = length & (SHA1_BLOCK_SIZE - 1);
tail = length & (ctx->block_size - 1);
length -= tail;
ctx->total += tail;
ctx->offset = length; /* offset where to start slow */
@ -445,10 +594,10 @@ static int atmel_sha_update_dma_start(struct atmel_sha_dev *dd)
atmel_sha_fill_padding(ctx, length);
ctx->dma_addr = dma_map_single(dd->dev, ctx->buffer,
ctx->buflen + SHA1_BLOCK_SIZE, DMA_TO_DEVICE);
ctx->buflen + ctx->block_size, DMA_TO_DEVICE);
if (dma_mapping_error(dd->dev, ctx->dma_addr)) {
dev_err(dd->dev, "dma %u bytes error\n",
ctx->buflen + SHA1_BLOCK_SIZE);
ctx->buflen + ctx->block_size);
return -EINVAL;
}
@ -456,7 +605,7 @@ static int atmel_sha_update_dma_start(struct atmel_sha_dev *dd)
ctx->flags &= ~SHA_FLAGS_SG;
count = ctx->bufcnt;
ctx->bufcnt = 0;
return atmel_sha_xmit_pdc(dd, ctx->dma_addr, count, 0,
return atmel_sha_xmit_start(dd, ctx->dma_addr, count, 0,
0, final);
} else {
ctx->sg = sg;
@ -470,7 +619,7 @@ static int atmel_sha_update_dma_start(struct atmel_sha_dev *dd)
count = ctx->bufcnt;
ctx->bufcnt = 0;
return atmel_sha_xmit_pdc(dd, sg_dma_address(ctx->sg),
return atmel_sha_xmit_start(dd, sg_dma_address(ctx->sg),
length, ctx->dma_addr, count, final);
}
}
@ -483,7 +632,7 @@ static int atmel_sha_update_dma_start(struct atmel_sha_dev *dd)
ctx->flags |= SHA_FLAGS_SG;
/* next call does not fail... so no unmap in the case of error */
return atmel_sha_xmit_pdc(dd, sg_dma_address(ctx->sg), length, 0,
return atmel_sha_xmit_start(dd, sg_dma_address(ctx->sg), length, 0,
0, final);
}
@ -498,12 +647,13 @@ static int atmel_sha_update_dma_stop(struct atmel_sha_dev *dd)
if (ctx->sg)
ctx->offset = 0;
}
if (ctx->flags & SHA_FLAGS_PAD)
if (ctx->flags & SHA_FLAGS_PAD) {
dma_unmap_single(dd->dev, ctx->dma_addr,
ctx->buflen + SHA1_BLOCK_SIZE, DMA_TO_DEVICE);
ctx->buflen + ctx->block_size, DMA_TO_DEVICE);
}
} else {
dma_unmap_single(dd->dev, ctx->dma_addr, ctx->buflen +
SHA1_BLOCK_SIZE, DMA_TO_DEVICE);
ctx->block_size, DMA_TO_DEVICE);
}
return 0;
@ -515,8 +665,8 @@ static int atmel_sha_update_req(struct atmel_sha_dev *dd)
struct atmel_sha_reqctx *ctx = ahash_request_ctx(req);
int err;
dev_dbg(dd->dev, "update_req: total: %u, digcnt: %d, finup: %d\n",
ctx->total, ctx->digcnt, (ctx->flags & SHA_FLAGS_FINUP) != 0);
dev_dbg(dd->dev, "update_req: total: %u, digcnt: 0x%llx 0x%llx\n",
ctx->total, ctx->digcnt[1], ctx->digcnt[0]);
if (ctx->flags & SHA_FLAGS_CPU)
err = atmel_sha_update_cpu(dd);
@ -524,8 +674,8 @@ static int atmel_sha_update_req(struct atmel_sha_dev *dd)
err = atmel_sha_update_dma_start(dd);
/* wait for dma completion before can take more data */
dev_dbg(dd->dev, "update: err: %d, digcnt: %d\n",
err, ctx->digcnt);
dev_dbg(dd->dev, "update: err: %d, digcnt: 0x%llx 0%llx\n",
err, ctx->digcnt[1], ctx->digcnt[0]);
return err;
}
@ -562,12 +712,21 @@ static void atmel_sha_copy_hash(struct ahash_request *req)
u32 *hash = (u32 *)ctx->digest;
int i;
if (likely(ctx->flags & SHA_FLAGS_SHA1))
if (ctx->flags & SHA_FLAGS_SHA1)
for (i = 0; i < SHA1_DIGEST_SIZE / sizeof(u32); i++)
hash[i] = atmel_sha_read(ctx->dd, SHA_REG_DIGEST(i));
else
else if (ctx->flags & SHA_FLAGS_SHA224)
for (i = 0; i < SHA224_DIGEST_SIZE / sizeof(u32); i++)
hash[i] = atmel_sha_read(ctx->dd, SHA_REG_DIGEST(i));
else if (ctx->flags & SHA_FLAGS_SHA256)
for (i = 0; i < SHA256_DIGEST_SIZE / sizeof(u32); i++)
hash[i] = atmel_sha_read(ctx->dd, SHA_REG_DIGEST(i));
else if (ctx->flags & SHA_FLAGS_SHA384)
for (i = 0; i < SHA384_DIGEST_SIZE / sizeof(u32); i++)
hash[i] = atmel_sha_read(ctx->dd, SHA_REG_DIGEST(i));
else
for (i = 0; i < SHA512_DIGEST_SIZE / sizeof(u32); i++)
hash[i] = atmel_sha_read(ctx->dd, SHA_REG_DIGEST(i));
}
static void atmel_sha_copy_ready_hash(struct ahash_request *req)
@ -577,10 +736,16 @@ static void atmel_sha_copy_ready_hash(struct ahash_request *req)
if (!req->result)
return;
if (likely(ctx->flags & SHA_FLAGS_SHA1))
if (ctx->flags & SHA_FLAGS_SHA1)
memcpy(req->result, ctx->digest, SHA1_DIGEST_SIZE);
else
else if (ctx->flags & SHA_FLAGS_SHA224)
memcpy(req->result, ctx->digest, SHA224_DIGEST_SIZE);
else if (ctx->flags & SHA_FLAGS_SHA256)
memcpy(req->result, ctx->digest, SHA256_DIGEST_SIZE);
else if (ctx->flags & SHA_FLAGS_SHA384)
memcpy(req->result, ctx->digest, SHA384_DIGEST_SIZE);
else
memcpy(req->result, ctx->digest, SHA512_DIGEST_SIZE);
}
static int atmel_sha_finish(struct ahash_request *req)
@ -589,11 +754,11 @@ static int atmel_sha_finish(struct ahash_request *req)
struct atmel_sha_dev *dd = ctx->dd;
int err = 0;
if (ctx->digcnt)
if (ctx->digcnt[0] || ctx->digcnt[1])
atmel_sha_copy_ready_hash(req);
dev_dbg(dd->dev, "digcnt: %d, bufcnt: %d\n", ctx->digcnt,
ctx->bufcnt);
dev_dbg(dd->dev, "digcnt: 0x%llx 0x%llx, bufcnt: %d\n", ctx->digcnt[1],
ctx->digcnt[0], ctx->bufcnt);
return err;
}
@ -628,9 +793,8 @@ static int atmel_sha_hw_init(struct atmel_sha_dev *dd)
{
clk_prepare_enable(dd->iclk);
if (SHA_FLAGS_INIT & dd->flags) {
if (!(SHA_FLAGS_INIT & dd->flags)) {
atmel_sha_write(dd, SHA_CR, SHA_CR_SWRST);
atmel_sha_dualbuff_test(dd);
dd->flags |= SHA_FLAGS_INIT;
dd->err = 0;
}
@ -638,6 +802,23 @@ static int atmel_sha_hw_init(struct atmel_sha_dev *dd)
return 0;
}
static inline unsigned int atmel_sha_get_version(struct atmel_sha_dev *dd)
{
return atmel_sha_read(dd, SHA_HW_VERSION) & 0x00000fff;
}
static void atmel_sha_hw_version_init(struct atmel_sha_dev *dd)
{
atmel_sha_hw_init(dd);
dd->hw_version = atmel_sha_get_version(dd);
dev_info(dd->dev,
"version: 0x%x\n", dd->hw_version);
clk_disable_unprepare(dd->iclk);
}
static int atmel_sha_handle_queue(struct atmel_sha_dev *dd,
struct ahash_request *req)
{
@ -682,10 +863,9 @@ static int atmel_sha_handle_queue(struct atmel_sha_dev *dd,
if (ctx->op == SHA_OP_UPDATE) {
err = atmel_sha_update_req(dd);
if (err != -EINPROGRESS && (ctx->flags & SHA_FLAGS_FINUP)) {
if (err != -EINPROGRESS && (ctx->flags & SHA_FLAGS_FINUP))
/* no final() after finup() */
err = atmel_sha_final_req(dd);
}
} else if (ctx->op == SHA_OP_FINAL) {
err = atmel_sha_final_req(dd);
}
@ -808,7 +988,7 @@ static int atmel_sha_cra_init_alg(struct crypto_tfm *tfm, const char *alg_base)
}
crypto_ahash_set_reqsize(__crypto_ahash_cast(tfm),
sizeof(struct atmel_sha_reqctx) +
SHA_BUFFER_LEN + SHA256_BLOCK_SIZE);
SHA_BUFFER_LEN + SHA512_BLOCK_SIZE);
return 0;
}
@ -826,7 +1006,7 @@ static void atmel_sha_cra_exit(struct crypto_tfm *tfm)
tctx->fallback = NULL;
}
static struct ahash_alg sha_algs[] = {
static struct ahash_alg sha_1_256_algs[] = {
{
.init = atmel_sha_init,
.update = atmel_sha_update,
@ -875,6 +1055,79 @@ static struct ahash_alg sha_algs[] = {
},
};
static struct ahash_alg sha_224_alg = {
.init = atmel_sha_init,
.update = atmel_sha_update,
.final = atmel_sha_final,
.finup = atmel_sha_finup,
.digest = atmel_sha_digest,
.halg = {
.digestsize = SHA224_DIGEST_SIZE,
.base = {
.cra_name = "sha224",
.cra_driver_name = "atmel-sha224",
.cra_priority = 100,
.cra_flags = CRYPTO_ALG_ASYNC |
CRYPTO_ALG_NEED_FALLBACK,
.cra_blocksize = SHA224_BLOCK_SIZE,
.cra_ctxsize = sizeof(struct atmel_sha_ctx),
.cra_alignmask = 0,
.cra_module = THIS_MODULE,
.cra_init = atmel_sha_cra_init,
.cra_exit = atmel_sha_cra_exit,
}
}
};
static struct ahash_alg sha_384_512_algs[] = {
{
.init = atmel_sha_init,
.update = atmel_sha_update,
.final = atmel_sha_final,
.finup = atmel_sha_finup,
.digest = atmel_sha_digest,
.halg = {
.digestsize = SHA384_DIGEST_SIZE,
.base = {
.cra_name = "sha384",
.cra_driver_name = "atmel-sha384",
.cra_priority = 100,
.cra_flags = CRYPTO_ALG_ASYNC |
CRYPTO_ALG_NEED_FALLBACK,
.cra_blocksize = SHA384_BLOCK_SIZE,
.cra_ctxsize = sizeof(struct atmel_sha_ctx),
.cra_alignmask = 0x3,
.cra_module = THIS_MODULE,
.cra_init = atmel_sha_cra_init,
.cra_exit = atmel_sha_cra_exit,
}
}
},
{
.init = atmel_sha_init,
.update = atmel_sha_update,
.final = atmel_sha_final,
.finup = atmel_sha_finup,
.digest = atmel_sha_digest,
.halg = {
.digestsize = SHA512_DIGEST_SIZE,
.base = {
.cra_name = "sha512",
.cra_driver_name = "atmel-sha512",
.cra_priority = 100,
.cra_flags = CRYPTO_ALG_ASYNC |
CRYPTO_ALG_NEED_FALLBACK,
.cra_blocksize = SHA512_BLOCK_SIZE,
.cra_ctxsize = sizeof(struct atmel_sha_ctx),
.cra_alignmask = 0x3,
.cra_module = THIS_MODULE,
.cra_init = atmel_sha_cra_init,
.cra_exit = atmel_sha_cra_exit,
}
}
},
};
static void atmel_sha_done_task(unsigned long data)
{
struct atmel_sha_dev *dd = (struct atmel_sha_dev *)data;
@ -941,32 +1194,142 @@ static void atmel_sha_unregister_algs(struct atmel_sha_dev *dd)
{
int i;
for (i = 0; i < ARRAY_SIZE(sha_algs); i++)
crypto_unregister_ahash(&sha_algs[i]);
for (i = 0; i < ARRAY_SIZE(sha_1_256_algs); i++)
crypto_unregister_ahash(&sha_1_256_algs[i]);
if (dd->caps.has_sha224)
crypto_unregister_ahash(&sha_224_alg);
if (dd->caps.has_sha_384_512) {
for (i = 0; i < ARRAY_SIZE(sha_384_512_algs); i++)
crypto_unregister_ahash(&sha_384_512_algs[i]);
}
}
static int atmel_sha_register_algs(struct atmel_sha_dev *dd)
{
int err, i, j;
for (i = 0; i < ARRAY_SIZE(sha_algs); i++) {
err = crypto_register_ahash(&sha_algs[i]);
for (i = 0; i < ARRAY_SIZE(sha_1_256_algs); i++) {
err = crypto_register_ahash(&sha_1_256_algs[i]);
if (err)
goto err_sha_algs;
goto err_sha_1_256_algs;
}
if (dd->caps.has_sha224) {
err = crypto_register_ahash(&sha_224_alg);
if (err)
goto err_sha_224_algs;
}
if (dd->caps.has_sha_384_512) {
for (i = 0; i < ARRAY_SIZE(sha_384_512_algs); i++) {
err = crypto_register_ahash(&sha_384_512_algs[i]);
if (err)
goto err_sha_384_512_algs;
}
}
return 0;
err_sha_algs:
err_sha_384_512_algs:
for (j = 0; j < i; j++)
crypto_unregister_ahash(&sha_algs[j]);
crypto_unregister_ahash(&sha_384_512_algs[j]);
crypto_unregister_ahash(&sha_224_alg);
err_sha_224_algs:
i = ARRAY_SIZE(sha_1_256_algs);
err_sha_1_256_algs:
for (j = 0; j < i; j++)
crypto_unregister_ahash(&sha_1_256_algs[j]);
return err;
}
static bool atmel_sha_filter(struct dma_chan *chan, void *slave)
{
struct at_dma_slave *sl = slave;
if (sl && sl->dma_dev == chan->device->dev) {
chan->private = sl;
return true;
} else {
return false;
}
}
static int atmel_sha_dma_init(struct atmel_sha_dev *dd,
struct crypto_platform_data *pdata)
{
int err = -ENOMEM;
dma_cap_mask_t mask_in;
if (pdata && pdata->dma_slave->rxdata.dma_dev) {
/* Try to grab DMA channel */
dma_cap_zero(mask_in);
dma_cap_set(DMA_SLAVE, mask_in);
dd->dma_lch_in.chan = dma_request_channel(mask_in,
atmel_sha_filter, &pdata->dma_slave->rxdata);
if (!dd->dma_lch_in.chan)
return err;
dd->dma_lch_in.dma_conf.direction = DMA_MEM_TO_DEV;
dd->dma_lch_in.dma_conf.dst_addr = dd->phys_base +
SHA_REG_DIN(0);
dd->dma_lch_in.dma_conf.src_maxburst = 1;
dd->dma_lch_in.dma_conf.src_addr_width =
DMA_SLAVE_BUSWIDTH_4_BYTES;
dd->dma_lch_in.dma_conf.dst_maxburst = 1;
dd->dma_lch_in.dma_conf.dst_addr_width =
DMA_SLAVE_BUSWIDTH_4_BYTES;
dd->dma_lch_in.dma_conf.device_fc = false;
return 0;
}
return -ENODEV;
}
static void atmel_sha_dma_cleanup(struct atmel_sha_dev *dd)
{
dma_release_channel(dd->dma_lch_in.chan);
}
static void atmel_sha_get_cap(struct atmel_sha_dev *dd)
{
dd->caps.has_dma = 0;
dd->caps.has_dualbuff = 0;
dd->caps.has_sha224 = 0;
dd->caps.has_sha_384_512 = 0;
/* keep only major version number */
switch (dd->hw_version & 0xff0) {
case 0x410:
dd->caps.has_dma = 1;
dd->caps.has_dualbuff = 1;
dd->caps.has_sha224 = 1;
dd->caps.has_sha_384_512 = 1;
break;
case 0x400:
dd->caps.has_dma = 1;
dd->caps.has_dualbuff = 1;
dd->caps.has_sha224 = 1;
break;
case 0x320:
break;
default:
dev_warn(dd->dev,
"Unmanaged sha version, set minimum capabilities\n");
break;
}
}
static int atmel_sha_probe(struct platform_device *pdev)
{
struct atmel_sha_dev *sha_dd;
struct crypto_platform_data *pdata;
struct device *dev = &pdev->dev;
struct resource *sha_res;
unsigned long sha_phys_size;
@ -1018,7 +1381,7 @@ static int atmel_sha_probe(struct platform_device *pdev)
}
/* Initializing the clock */
sha_dd->iclk = clk_get(&pdev->dev, NULL);
sha_dd->iclk = clk_get(&pdev->dev, "sha_clk");
if (IS_ERR(sha_dd->iclk)) {
dev_err(dev, "clock intialization failed.\n");
err = PTR_ERR(sha_dd->iclk);
@ -1032,6 +1395,22 @@ static int atmel_sha_probe(struct platform_device *pdev)
goto sha_io_err;
}
atmel_sha_hw_version_init(sha_dd);
atmel_sha_get_cap(sha_dd);
if (sha_dd->caps.has_dma) {
pdata = pdev->dev.platform_data;
if (!pdata) {
dev_err(&pdev->dev, "platform data not available\n");
err = -ENXIO;
goto err_pdata;
}
err = atmel_sha_dma_init(sha_dd, pdata);
if (err)
goto err_sha_dma;
}
spin_lock(&atmel_sha.lock);
list_add_tail(&sha_dd->list, &atmel_sha.dev_list);
spin_unlock(&atmel_sha.lock);
@ -1048,6 +1427,10 @@ err_algs:
spin_lock(&atmel_sha.lock);
list_del(&sha_dd->list);
spin_unlock(&atmel_sha.lock);
if (sha_dd->caps.has_dma)
atmel_sha_dma_cleanup(sha_dd);
err_sha_dma:
err_pdata:
iounmap(sha_dd->io_base);
sha_io_err:
clk_put(sha_dd->iclk);
@ -1078,6 +1461,9 @@ static int atmel_sha_remove(struct platform_device *pdev)
tasklet_kill(&sha_dd->done_task);
if (sha_dd->caps.has_dma)
atmel_sha_dma_cleanup(sha_dd);
iounmap(sha_dd->io_base);
clk_put(sha_dd->iclk);
@ -1102,6 +1488,6 @@ static struct platform_driver atmel_sha_driver = {
module_platform_driver(atmel_sha_driver);
MODULE_DESCRIPTION("Atmel SHA1/SHA256 hw acceleration support.");
MODULE_DESCRIPTION("Atmel SHA (1/256/224/384/512) hw acceleration support.");
MODULE_LICENSE("GPL v2");
MODULE_AUTHOR("Nicolas Royer - Eukréa Electromatique");