[PATCH 4/4 v2] crypto: Atmel SHA driver: add support for latest release of the IP (0x410)
From: Nicolas Royer
Date: Wed Feb 20 2013 - 11:11:48 EST
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@xxxxxxxxxx>
Acked-by: Nicolas Ferre <nicolas.ferre@xxxxxxxxx>
Acked-by: Eric BÃnard <eric@xxxxxxxxxx>
Tested-by: Eric BÃnard <eric@xxxxxxxxxx>
---
v2 : no change.
drivers/crypto/Kconfig | 8 +-
drivers/crypto/atmel-sha-regs.h | 7 +-
drivers/crypto/atmel-sha.c | 586 +++++++++++++++++++++++++++++++++-------
3 files changed, 497 insertions(+), 104 deletions(-)
diff --git a/drivers/crypto/Kconfig b/drivers/crypto/Kconfig
index 87ec4d0..e66fb0a 100644
--- a/drivers/crypto/Kconfig
+++ b/drivers/crypto/Kconfig
@@ -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.
diff --git a/drivers/crypto/atmel-sha-regs.h b/drivers/crypto/atmel-sha-regs.h
index dc53a20..83b2d74 100644
--- a/drivers/crypto/atmel-sha-regs.h
+++ b/drivers/crypto/atmel-sha-regs.h
@@ -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
diff --git a/drivers/crypto/atmel-sha.c b/drivers/crypto/atmel-sha.c
index 4918e94..eaed8bf 100644
--- a/drivers/crypto/atmel-sha.c
+++ b/drivers/crypto/atmel-sha.c
@@ -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;
-
- bits = (ctx->bufcnt + ctx->digcnt + length) << 3;
- size = cpu_to_be64(bits);
-
- 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;
+ u64 bits[2];
+ u64 size[2];
+
+ size[0] = ctx->digcnt[0];
+ size[1] = ctx->digcnt[1];
+
+ 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_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_algs[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 - EukrÃa Electromatique");
--
1.8.1
--
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