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crypto: rockchip - Don't dequeue the request when device is busy

Forráskód böngészése 
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>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Zain Wang
2017-08-15 15:48:15 +08:00
committed by Herbert Xu
szülő baf5b752da
commit 5a7801f663
4 fájl változott, egészen pontosan 160 új sor hozzáadva és 148 régi sor törölve
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133
drivers/crypto/rockchip/rk3288_crypto_ahash.c
Fájl megtekintése

@@ -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: