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Subject[PATCH] crypto: rockchip: Don't dequeue the request when device is busy
Date
The device can only process one request at a time. So if multiple
requests came at the same time, we can enqueue them first, and
dequeue them one by one when the device is idle.

Signed-off-by: zain wang <wzz@rock-chips.com>
---
drivers/crypto/rockchip/rk3288_crypto.c | 46 ++++++-
drivers/crypto/rockchip/rk3288_crypto.h | 11 +-
drivers/crypto/rockchip/rk3288_crypto_ablkcipher.c | 118 ++++++++----------
drivers/crypto/rockchip/rk3288_crypto_ahash.c | 133 ++++++++++-----------
4 files changed, 160 insertions(+), 148 deletions(-)

diff --git a/drivers/crypto/rockchip/rk3288_crypto.c b/drivers/crypto/rockchip/rk3288_crypto.c
index 57c3783..c9d622a 100644
--- a/drivers/crypto/rockchip/rk3288_crypto.c
+++ b/drivers/crypto/rockchip/rk3288_crypto.c
@@ -184,15 +184,53 @@ static irqreturn_t rk_crypto_irq_handle(int irq, void *dev_id)
return IRQ_HANDLED;
}

+static int rk_crypto_enqueue(struct rk_crypto_info *dev,
+ struct crypto_async_request *async_req)
+{
+ unsigned long flags;
+ int ret;
+
+ spin_lock_irqsave(&dev->lock, flags);
+ ret = crypto_enqueue_request(&dev->queue, async_req);
+ if (dev->busy) {
+ spin_unlock_irqrestore(&dev->lock, flags);
+ return ret;
+ }
+ dev->busy = true;
+ spin_unlock_irqrestore(&dev->lock, flags);
+ tasklet_schedule(&dev->queue_task);
+
+ return ret;
+}
+
static void rk_crypto_queue_task_cb(unsigned long data)
{
struct rk_crypto_info *dev = (struct rk_crypto_info *)data;
+ struct crypto_async_request *async_req, *backlog;
+ unsigned long flags;
int err = 0;

dev->err = 0;
+ spin_lock_irqsave(&dev->lock, flags);
+ backlog = crypto_get_backlog(&dev->queue);
+ async_req = crypto_dequeue_request(&dev->queue);
+
+ if (!async_req) {
+ dev->busy = false;
+ spin_unlock_irqrestore(&dev->lock, flags);
+ return;
+ }
+ spin_unlock_irqrestore(&dev->lock, flags);
+
+ if (backlog) {
+ backlog->complete(backlog, -EINPROGRESS);
+ backlog = NULL;
+ }
+
+ dev->async_req = async_req;
err = dev->start(dev);
if (err)
- dev->complete(dev, err);
+ dev->complete(dev->async_req, err);
}

static void rk_crypto_done_task_cb(unsigned long data)
@@ -200,13 +238,13 @@ static void rk_crypto_done_task_cb(unsigned long data)
struct rk_crypto_info *dev = (struct rk_crypto_info *)data;

if (dev->err) {
- dev->complete(dev, dev->err);
+ dev->complete(dev->async_req, dev->err);
return;
}

dev->err = dev->update(dev);
if (dev->err)
- dev->complete(dev, dev->err);
+ dev->complete(dev->async_req, dev->err);
}

static struct rk_crypto_tmp *rk_cipher_algs[] = {
@@ -365,6 +403,8 @@ static int rk_crypto_probe(struct platform_device *pdev)
crypto_info->disable_clk = rk_crypto_disable_clk;
crypto_info->load_data = rk_load_data;
crypto_info->unload_data = rk_unload_data;
+ crypto_info->enqueue = rk_crypto_enqueue;
+ crypto_info->busy = false;

err = rk_crypto_register(crypto_info);
if (err) {
diff --git a/drivers/crypto/rockchip/rk3288_crypto.h b/drivers/crypto/rockchip/rk3288_crypto.h
index 65ad1c2..ab6a1b4 100644
--- a/drivers/crypto/rockchip/rk3288_crypto.h
+++ b/drivers/crypto/rockchip/rk3288_crypto.h
@@ -192,8 +192,7 @@ struct rk_crypto_info {
struct crypto_queue queue;
struct tasklet_struct queue_task;
struct tasklet_struct done_task;
- struct ablkcipher_request *ablk_req;
- struct ahash_request *ahash_req;
+ struct crypto_async_request *async_req;
int err;
/* device lock */
spinlock_t lock;
@@ -210,18 +209,20 @@ struct rk_crypto_info {
size_t nents;
unsigned int total;
unsigned int count;
- u32 mode;
dma_addr_t addr_in;
dma_addr_t addr_out;
+ bool busy;
int (*start)(struct rk_crypto_info *dev);
int (*update)(struct rk_crypto_info *dev);
- void (*complete)(struct rk_crypto_info *dev, int err);
+ void (*complete)(struct crypto_async_request *base, int err);
int (*enable_clk)(struct rk_crypto_info *dev);
void (*disable_clk)(struct rk_crypto_info *dev);
int (*load_data)(struct rk_crypto_info *dev,
struct scatterlist *sg_src,
struct scatterlist *sg_dst);
void (*unload_data)(struct rk_crypto_info *dev);
+ int (*enqueue)(struct rk_crypto_info *dev,
+ struct crypto_async_request *async_req);
};

/* the private variable of hash */
@@ -234,12 +235,14 @@ struct rk_ahash_ctx {
/* the privete variable of hash for fallback */
struct rk_ahash_rctx {
struct ahash_request fallback_req;
+ u32 mode;
};

/* the private variable of cipher */
struct rk_cipher_ctx {
struct rk_crypto_info *dev;
unsigned int keylen;
+ u32 mode;
};

enum alg_type {
diff --git a/drivers/crypto/rockchip/rk3288_crypto_ablkcipher.c b/drivers/crypto/rockchip/rk3288_crypto_ablkcipher.c
index dbe78de..639c15c 100644
--- a/drivers/crypto/rockchip/rk3288_crypto_ablkcipher.c
+++ b/drivers/crypto/rockchip/rk3288_crypto_ablkcipher.c
@@ -15,50 +15,19 @@

#define RK_CRYPTO_DEC BIT(0)

-static void rk_crypto_complete(struct rk_crypto_info *dev, int err)
+static void rk_crypto_complete(struct crypto_async_request *base, int err)
{
- if (dev->ablk_req->base.complete)
- dev->ablk_req->base.complete(&dev->ablk_req->base, err);
+ if (base->complete)
+ base->complete(base, err);
}

static int rk_handle_req(struct rk_crypto_info *dev,
struct ablkcipher_request *req)
{
- unsigned long flags;
- struct crypto_async_request *async_req, *backlog;
- int err;
-
if (!IS_ALIGNED(req->nbytes, dev->align_size))
return -EINVAL;
-
- dev->left_bytes = req->nbytes;
- dev->total = req->nbytes;
- dev->sg_src = req->src;
- dev->first = req->src;
- dev->nents = sg_nents(req->src);
- dev->sg_dst = req->dst;
- dev->aligned = 1;
- dev->ablk_req = req;
-
- spin_lock_irqsave(&dev->lock, flags);
- err = ablkcipher_enqueue_request(&dev->queue, req);
- backlog = crypto_get_backlog(&dev->queue);
- async_req = crypto_dequeue_request(&dev->queue);
- spin_unlock_irqrestore(&dev->lock, flags);
-
- if (!async_req) {
- dev_err(dev->dev, "async_req is NULL !!\n");
- return err;
- }
- if (backlog) {
- backlog->complete(backlog, -EINPROGRESS);
- backlog = NULL;
- }
-
- dev->ablk_req = ablkcipher_request_cast(async_req);
-
- tasklet_schedule(&dev->queue_task);
- return err;
+ else
+ return dev->enqueue(dev, &req->base);
}

static int rk_aes_setkey(struct crypto_ablkcipher *cipher,
@@ -108,7 +77,7 @@ static int rk_aes_ecb_encrypt(struct ablkcipher_request *req)
struct rk_cipher_ctx *ctx = crypto_ablkcipher_ctx(tfm);
struct rk_crypto_info *dev = ctx->dev;

- dev->mode = RK_CRYPTO_AES_ECB_MODE;
+ ctx->mode = RK_CRYPTO_AES_ECB_MODE;
return rk_handle_req(dev, req);
}

@@ -118,7 +87,7 @@ static int rk_aes_ecb_decrypt(struct ablkcipher_request *req)
struct rk_cipher_ctx *ctx = crypto_ablkcipher_ctx(tfm);
struct rk_crypto_info *dev = ctx->dev;

- dev->mode = RK_CRYPTO_AES_ECB_MODE | RK_CRYPTO_DEC;
+ ctx->mode = RK_CRYPTO_AES_ECB_MODE | RK_CRYPTO_DEC;
return rk_handle_req(dev, req);
}

@@ -128,7 +97,7 @@ static int rk_aes_cbc_encrypt(struct ablkcipher_request *req)
struct rk_cipher_ctx *ctx = crypto_ablkcipher_ctx(tfm);
struct rk_crypto_info *dev = ctx->dev;

- dev->mode = RK_CRYPTO_AES_CBC_MODE;
+ ctx->mode = RK_CRYPTO_AES_CBC_MODE;
return rk_handle_req(dev, req);
}

@@ -138,7 +107,7 @@ static int rk_aes_cbc_decrypt(struct ablkcipher_request *req)
struct rk_cipher_ctx *ctx = crypto_ablkcipher_ctx(tfm);
struct rk_crypto_info *dev = ctx->dev;

- dev->mode = RK_CRYPTO_AES_CBC_MODE | RK_CRYPTO_DEC;
+ ctx->mode = RK_CRYPTO_AES_CBC_MODE | RK_CRYPTO_DEC;
return rk_handle_req(dev, req);
}

@@ -148,7 +117,7 @@ static int rk_des_ecb_encrypt(struct ablkcipher_request *req)
struct rk_cipher_ctx *ctx = crypto_ablkcipher_ctx(tfm);
struct rk_crypto_info *dev = ctx->dev;

- dev->mode = 0;
+ ctx->mode = 0;
return rk_handle_req(dev, req);
}

@@ -158,7 +127,7 @@ static int rk_des_ecb_decrypt(struct ablkcipher_request *req)
struct rk_cipher_ctx *ctx = crypto_ablkcipher_ctx(tfm);
struct rk_crypto_info *dev = ctx->dev;

- dev->mode = RK_CRYPTO_DEC;
+ ctx->mode = RK_CRYPTO_DEC;
return rk_handle_req(dev, req);
}

@@ -168,7 +137,7 @@ static int rk_des_cbc_encrypt(struct ablkcipher_request *req)
struct rk_cipher_ctx *ctx = crypto_ablkcipher_ctx(tfm);
struct rk_crypto_info *dev = ctx->dev;

- dev->mode = RK_CRYPTO_TDES_CHAINMODE_CBC;
+ ctx->mode = RK_CRYPTO_TDES_CHAINMODE_CBC;
return rk_handle_req(dev, req);
}

@@ -178,7 +147,7 @@ static int rk_des_cbc_decrypt(struct ablkcipher_request *req)
struct rk_cipher_ctx *ctx = crypto_ablkcipher_ctx(tfm);
struct rk_crypto_info *dev = ctx->dev;

- dev->mode = RK_CRYPTO_TDES_CHAINMODE_CBC | RK_CRYPTO_DEC;
+ ctx->mode = RK_CRYPTO_TDES_CHAINMODE_CBC | RK_CRYPTO_DEC;
return rk_handle_req(dev, req);
}

@@ -188,7 +157,7 @@ static int rk_des3_ede_ecb_encrypt(struct ablkcipher_request *req)
struct rk_cipher_ctx *ctx = crypto_ablkcipher_ctx(tfm);
struct rk_crypto_info *dev = ctx->dev;

- dev->mode = RK_CRYPTO_TDES_SELECT;
+ ctx->mode = RK_CRYPTO_TDES_SELECT;
return rk_handle_req(dev, req);
}

@@ -198,7 +167,7 @@ static int rk_des3_ede_ecb_decrypt(struct ablkcipher_request *req)
struct rk_cipher_ctx *ctx = crypto_ablkcipher_ctx(tfm);
struct rk_crypto_info *dev = ctx->dev;

- dev->mode = RK_CRYPTO_TDES_SELECT | RK_CRYPTO_DEC;
+ ctx->mode = RK_CRYPTO_TDES_SELECT | RK_CRYPTO_DEC;
return rk_handle_req(dev, req);
}

@@ -208,7 +177,7 @@ static int rk_des3_ede_cbc_encrypt(struct ablkcipher_request *req)
struct rk_cipher_ctx *ctx = crypto_ablkcipher_ctx(tfm);
struct rk_crypto_info *dev = ctx->dev;

- dev->mode = RK_CRYPTO_TDES_SELECT | RK_CRYPTO_TDES_CHAINMODE_CBC;
+ ctx->mode = RK_CRYPTO_TDES_SELECT | RK_CRYPTO_TDES_CHAINMODE_CBC;
return rk_handle_req(dev, req);
}

@@ -218,15 +187,16 @@ static int rk_des3_ede_cbc_decrypt(struct ablkcipher_request *req)
struct rk_cipher_ctx *ctx = crypto_ablkcipher_ctx(tfm);
struct rk_crypto_info *dev = ctx->dev;

- dev->mode = RK_CRYPTO_TDES_SELECT | RK_CRYPTO_TDES_CHAINMODE_CBC |
+ ctx->mode = RK_CRYPTO_TDES_SELECT | RK_CRYPTO_TDES_CHAINMODE_CBC |
RK_CRYPTO_DEC;
return rk_handle_req(dev, req);
}

static void rk_ablk_hw_init(struct rk_crypto_info *dev)
{
- struct crypto_ablkcipher *cipher =
- crypto_ablkcipher_reqtfm(dev->ablk_req);
+ struct ablkcipher_request *req =
+ ablkcipher_request_cast(dev->async_req);
+ struct crypto_ablkcipher *cipher = crypto_ablkcipher_reqtfm(req);
struct crypto_tfm *tfm = crypto_ablkcipher_tfm(cipher);
struct rk_cipher_ctx *ctx = crypto_ablkcipher_ctx(cipher);
u32 ivsize, block, conf_reg = 0;
@@ -235,25 +205,23 @@ static void rk_ablk_hw_init(struct rk_crypto_info *dev)
ivsize = crypto_ablkcipher_ivsize(cipher);

if (block == DES_BLOCK_SIZE) {
- dev->mode |= RK_CRYPTO_TDES_FIFO_MODE |
+ ctx->mode |= RK_CRYPTO_TDES_FIFO_MODE |
RK_CRYPTO_TDES_BYTESWAP_KEY |
RK_CRYPTO_TDES_BYTESWAP_IV;
- CRYPTO_WRITE(dev, RK_CRYPTO_TDES_CTRL, dev->mode);
- memcpy_toio(dev->reg + RK_CRYPTO_TDES_IV_0,
- dev->ablk_req->info, ivsize);
+ CRYPTO_WRITE(dev, RK_CRYPTO_TDES_CTRL, ctx->mode);
+ memcpy_toio(dev->reg + RK_CRYPTO_TDES_IV_0, req->info, ivsize);
conf_reg = RK_CRYPTO_DESSEL;
} else {
- dev->mode |= RK_CRYPTO_AES_FIFO_MODE |
+ ctx->mode |= RK_CRYPTO_AES_FIFO_MODE |
RK_CRYPTO_AES_KEY_CHANGE |
RK_CRYPTO_AES_BYTESWAP_KEY |
RK_CRYPTO_AES_BYTESWAP_IV;
if (ctx->keylen == AES_KEYSIZE_192)
- dev->mode |= RK_CRYPTO_AES_192BIT_key;
+ ctx->mode |= RK_CRYPTO_AES_192BIT_key;
else if (ctx->keylen == AES_KEYSIZE_256)
- dev->mode |= RK_CRYPTO_AES_256BIT_key;
- CRYPTO_WRITE(dev, RK_CRYPTO_AES_CTRL, dev->mode);
- memcpy_toio(dev->reg + RK_CRYPTO_AES_IV_0,
- dev->ablk_req->info, ivsize);
+ ctx->mode |= RK_CRYPTO_AES_256BIT_key;
+ CRYPTO_WRITE(dev, RK_CRYPTO_AES_CTRL, ctx->mode);
+ memcpy_toio(dev->reg + RK_CRYPTO_AES_IV_0, req->info, ivsize);
}
conf_reg |= RK_CRYPTO_BYTESWAP_BTFIFO |
RK_CRYPTO_BYTESWAP_BRFIFO;
@@ -283,8 +251,18 @@ static int rk_set_data_start(struct rk_crypto_info *dev)

static int rk_ablk_start(struct rk_crypto_info *dev)
{
+ struct ablkcipher_request *req =
+ ablkcipher_request_cast(dev->async_req);
unsigned long flags;
- int err;
+ int err = 0;
+
+ dev->left_bytes = req->nbytes;
+ dev->total = req->nbytes;
+ dev->sg_src = req->src;
+ dev->first = req->src;
+ dev->nents = sg_nents(req->src);
+ dev->sg_dst = req->dst;
+ dev->aligned = 1;

spin_lock_irqsave(&dev->lock, flags);
rk_ablk_hw_init(dev);
@@ -295,15 +273,16 @@ static int rk_ablk_start(struct rk_crypto_info *dev)

static void rk_iv_copyback(struct rk_crypto_info *dev)
{
- struct crypto_ablkcipher *tfm = crypto_ablkcipher_reqtfm(dev->ablk_req);
+ struct ablkcipher_request *req =
+ ablkcipher_request_cast(dev->async_req);
+ struct crypto_ablkcipher *tfm = crypto_ablkcipher_reqtfm(req);
u32 ivsize = crypto_ablkcipher_ivsize(tfm);

if (ivsize == DES_BLOCK_SIZE)
- memcpy_fromio(dev->ablk_req->info,
- dev->reg + RK_CRYPTO_TDES_IV_0, ivsize);
+ memcpy_fromio(req->info, dev->reg + RK_CRYPTO_TDES_IV_0,
+ ivsize);
else if (ivsize == AES_BLOCK_SIZE)
- memcpy_fromio(dev->ablk_req->info,
- dev->reg + RK_CRYPTO_AES_IV_0, ivsize);
+ memcpy_fromio(req->info, dev->reg + RK_CRYPTO_AES_IV_0, ivsize);
}

/* return:
@@ -313,10 +292,12 @@ static void rk_iv_copyback(struct rk_crypto_info *dev)
static int rk_ablk_rx(struct rk_crypto_info *dev)
{
int err = 0;
+ struct ablkcipher_request *req =
+ ablkcipher_request_cast(dev->async_req);

dev->unload_data(dev);
if (!dev->aligned) {
- if (!sg_pcopy_from_buffer(dev->ablk_req->dst, dev->nents,
+ if (!sg_pcopy_from_buffer(req->dst, dev->nents,
dev->addr_vir, dev->count,
dev->total - dev->left_bytes -
dev->count)) {
@@ -339,7 +320,8 @@ static int rk_ablk_rx(struct rk_crypto_info *dev)
} else {
rk_iv_copyback(dev);
/* here show the calculation is over without any err */
- dev->complete(dev, 0);
+ dev->complete(dev->async_req, 0);
+ tasklet_schedule(&dev->queue_task);
}
out_rx:
return err;
diff --git a/drivers/crypto/rockchip/rk3288_crypto_ahash.c b/drivers/crypto/rockchip/rk3288_crypto_ahash.c
index ebc46e0..821a506 100644
--- a/drivers/crypto/rockchip/rk3288_crypto_ahash.c
+++ b/drivers/crypto/rockchip/rk3288_crypto_ahash.c
@@ -40,14 +40,16 @@ static int zero_message_process(struct ahash_request *req)
return 0;
}

-static void rk_ahash_crypto_complete(struct rk_crypto_info *dev, int err)
+static void rk_ahash_crypto_complete(struct crypto_async_request *base, int err)
{
- if (dev->ahash_req->base.complete)
- dev->ahash_req->base.complete(&dev->ahash_req->base, err);
+ if (base->complete)
+ base->complete(base, err);
}

static void rk_ahash_reg_init(struct rk_crypto_info *dev)
{
+ struct ahash_request *req = ahash_request_cast(dev->async_req);
+ struct rk_ahash_rctx *rctx = ahash_request_ctx(req);
int reg_status = 0;

reg_status = CRYPTO_READ(dev, RK_CRYPTO_CTRL) |
@@ -67,7 +69,7 @@ static void rk_ahash_reg_init(struct rk_crypto_info *dev)
CRYPTO_WRITE(dev, RK_CRYPTO_INTSTS, RK_CRYPTO_HRDMA_ERR_INT |
RK_CRYPTO_HRDMA_DONE_INT);

- CRYPTO_WRITE(dev, RK_CRYPTO_HASH_CTRL, dev->mode |
+ CRYPTO_WRITE(dev, RK_CRYPTO_HASH_CTRL, rctx->mode |
RK_CRYPTO_HASH_SWAP_DO);

CRYPTO_WRITE(dev, RK_CRYPTO_CONF, RK_CRYPTO_BYTESWAP_HRFIFO |
@@ -164,78 +166,13 @@ static int rk_ahash_export(struct ahash_request *req, void *out)

static int rk_ahash_digest(struct ahash_request *req)
{
- struct crypto_ahash *tfm = crypto_ahash_reqtfm(req);
struct rk_ahash_ctx *tctx = crypto_tfm_ctx(req->base.tfm);
- struct crypto_async_request *async_req, *backlog;
- struct rk_crypto_info *dev = NULL;
- unsigned long flags;
- int ret;
+ struct rk_crypto_info *dev = tctx->dev;

if (!req->nbytes)
return zero_message_process(req);
-
- dev = tctx->dev;
- dev->total = req->nbytes;
- dev->left_bytes = req->nbytes;
- dev->aligned = 0;
- dev->mode = 0;
- dev->align_size = 4;
- dev->sg_dst = NULL;
- dev->sg_src = req->src;
- dev->first = req->src;
- dev->nents = sg_nents(req->src);
-
- switch (crypto_ahash_digestsize(tfm)) {
- case SHA1_DIGEST_SIZE:
- dev->mode = RK_CRYPTO_HASH_SHA1;
- break;
- case SHA256_DIGEST_SIZE:
- dev->mode = RK_CRYPTO_HASH_SHA256;
- break;
- case MD5_DIGEST_SIZE:
- dev->mode = RK_CRYPTO_HASH_MD5;
- break;
- default:
- return -EINVAL;
- }
-
- rk_ahash_reg_init(dev);
-
- spin_lock_irqsave(&dev->lock, flags);
- ret = crypto_enqueue_request(&dev->queue, &req->base);
- backlog = crypto_get_backlog(&dev->queue);
- async_req = crypto_dequeue_request(&dev->queue);
- spin_unlock_irqrestore(&dev->lock, flags);
-
- if (!async_req) {
- dev_err(dev->dev, "async_req is NULL !!\n");
- return ret;
- }
- if (backlog) {
- backlog->complete(backlog, -EINPROGRESS);
- backlog = NULL;
- }
-
- dev->ahash_req = ahash_request_cast(async_req);
-
- tasklet_schedule(&dev->queue_task);
-
- /*
- * it will take some time to process date after last dma transmission.
- *
- * waiting time is relative with the last date len,
- * so cannot set a fixed time here.
- * 10-50 makes system not call here frequently wasting
- * efficiency, and make it response quickly when dma
- * complete.
- */
- while (!CRYPTO_READ(dev, RK_CRYPTO_HASH_STS))
- usleep_range(10, 50);
-
- memcpy_fromio(req->result, dev->reg + RK_CRYPTO_HASH_DOUT_0,
- crypto_ahash_digestsize(tfm));
-
- return 0;
+ else
+ return dev->enqueue(dev, &req->base);
}

static void crypto_ahash_dma_start(struct rk_crypto_info *dev)
@@ -258,12 +195,45 @@ static int rk_ahash_set_data_start(struct rk_crypto_info *dev)

static int rk_ahash_start(struct rk_crypto_info *dev)
{
+ struct ahash_request *req = ahash_request_cast(dev->async_req);
+ struct crypto_ahash *tfm;
+ struct rk_ahash_rctx *rctx;
+
+ dev->total = req->nbytes;
+ dev->left_bytes = req->nbytes;
+ dev->aligned = 0;
+ dev->align_size = 4;
+ dev->sg_dst = NULL;
+ dev->sg_src = req->src;
+ dev->first = req->src;
+ dev->nents = sg_nents(req->src);
+ rctx = ahash_request_ctx(req);
+ rctx->mode = 0;
+
+ tfm = crypto_ahash_reqtfm(req);
+ switch (crypto_ahash_digestsize(tfm)) {
+ case SHA1_DIGEST_SIZE:
+ rctx->mode = RK_CRYPTO_HASH_SHA1;
+ break;
+ case SHA256_DIGEST_SIZE:
+ rctx->mode = RK_CRYPTO_HASH_SHA256;
+ break;
+ case MD5_DIGEST_SIZE:
+ rctx->mode = RK_CRYPTO_HASH_MD5;
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ rk_ahash_reg_init(dev);
return rk_ahash_set_data_start(dev);
}

static int rk_ahash_crypto_rx(struct rk_crypto_info *dev)
{
int err = 0;
+ struct ahash_request *req = ahash_request_cast(dev->async_req);
+ struct crypto_ahash *tfm;

dev->unload_data(dev);
if (dev->left_bytes) {
@@ -278,7 +248,24 @@ static int rk_ahash_crypto_rx(struct rk_crypto_info *dev)
}
err = rk_ahash_set_data_start(dev);
} else {
- dev->complete(dev, 0);
+ /*
+ * it will take some time to process date after last dma
+ * transmission.
+ *
+ * waiting time is relative with the last date len,
+ * so cannot set a fixed time here.
+ * 10us makes system not call here frequently wasting
+ * efficiency, and make it response quickly when dma
+ * complete.
+ */
+ while (!CRYPTO_READ(dev, RK_CRYPTO_HASH_STS))
+ udelay(10);
+
+ tfm = crypto_ahash_reqtfm(req);
+ memcpy_fromio(req->result, dev->reg + RK_CRYPTO_HASH_DOUT_0,
+ crypto_ahash_digestsize(tfm));
+ dev->complete(dev->async_req, 0);
+ tasklet_schedule(&dev->queue_task);
}

out_rx:
--
1.9.1

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