@@ -486,6 +486,16 @@ static int allocate_flows(struct sun8i_ss_dev *ss)
goto error_engine;
}
+ /* the padding could be up to two block. */
+ ss->flows[i].pad = devm_kmalloc(ss->dev, SHA256_BLOCK_SIZE * 2,
+ GFP_KERNEL | GFP_DMA);
+ if (!ss->flows[i].pad)
+ goto error_engine;
+ ss->flows[i].result = devm_kmalloc(ss->dev, SHA256_DIGEST_SIZE,
+ GFP_KERNEL | GFP_DMA);
+ if (!ss->flows[i].result)
+ goto error_engine;
+
ss->flows[i].engine = crypto_engine_alloc_init(ss->dev, true);
if (!ss->flows[i].engine) {
dev_err(ss->dev, "Cannot allocate engine\n");
@@ -332,18 +332,11 @@ int sun8i_ss_hash_run(struct crypto_engine *engine, void *breq)
if (digestsize == SHA224_DIGEST_SIZE)
digestsize = SHA256_DIGEST_SIZE;
- /* the padding could be up to two block. */
- pad = kzalloc(algt->alg.hash.halg.base.cra_blocksize * 2, GFP_KERNEL | GFP_DMA);
- if (!pad)
- return -ENOMEM;
+ result = ss->flows[rctx->flow].result;
+ pad = ss->flows[rctx->flow].pad;
+ memset(pad, 0, algt->alg.hash.halg.base.cra_blocksize * 2);
bf = (__le32 *)pad;
- result = kzalloc(digestsize, GFP_KERNEL | GFP_DMA);
- if (!result) {
- kfree(pad);
- return -ENOMEM;
- }
-
for (i = 0; i < MAX_SG; i++) {
rctx->t_dst[i].addr = 0;
rctx->t_dst[i].len = 0;
@@ -439,8 +432,6 @@ int sun8i_ss_hash_run(struct crypto_engine *engine, void *breq)
memcpy(areq->result, result, algt->alg.hash.halg.digestsize);
theend:
- kfree(pad);
- kfree(result);
local_bh_disable();
crypto_finalize_hash_request(engine, breq, err);
local_bh_enable();
@@ -123,6 +123,8 @@ struct sginfo {
* @stat_req: number of request done by this flow
* @iv: list of IV to use for each step
* @biv: buffer which contain the backuped IV
+ * @pad: padding buffer for hash operations
+ * @result: buffer for storing the result of hash operations
*/
struct sun8i_ss_flow {
struct crypto_engine *engine;
@@ -130,6 +132,8 @@ struct sun8i_ss_flow {
int status;
u8 *iv[MAX_SG];
u8 *biv;
+ void *pad;
+ void *result;
#ifdef CONFIG_CRYPTO_DEV_SUN8I_SS_DEBUG
unsigned long stat_req;
#endif
Instead of allocate memory on each requests, it is easier to pre-allocate buffers. This made error path easier. Signed-off-by: Corentin Labbe <clabbe@baylibre.com> --- drivers/crypto/allwinner/sun8i-ss/sun8i-ss-core.c | 10 ++++++++++ drivers/crypto/allwinner/sun8i-ss/sun8i-ss-hash.c | 15 +++------------ drivers/crypto/allwinner/sun8i-ss/sun8i-ss.h | 4 ++++ 3 files changed, 17 insertions(+), 12 deletions(-)