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crypto: inside-secure - handle more result requests when counter is full 

This patch modifies the result handling logic to continue handling
results when the completed requests counter is full and not showing the
actual number of requests to handle.

Suggested-by: Ofer Heifetz <oferh@marvell.com>
Signed-off-by: Antoine Tenart <antoine.tenart@free-electrons.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Antoine Ténart 2017-12-14 15:26:56 +01:00 committed by Herbert Xu
parent 2313e9f7ec
commit 7f77f5a4fc
2 changed files with 14 additions and 3 deletions
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15
drivers/crypto/inside-secure/safexcel.c
View File

@ -600,12 +600,15 @@ static inline void safexcel_handle_result_descriptor(struct safexcel_crypto_priv
{
struct safexcel_request *sreq;
struct safexcel_context *ctx;
int ret, i, nreq, ndesc = 0, tot_descs = 0, done;
int ret, i, nreq, ndesc, tot_descs, done;
bool should_complete;
handle_results:
tot_descs = 0;
nreq = readl(priv->base + EIP197_HIA_RDR(ring) + EIP197_HIA_xDR_PROC_COUNT);
nreq >>= 24;
nreq &= GENMASK(6, 0);
nreq >>= EIP197_xDR_PROC_xD_PKT_OFFSET;
nreq &= EIP197_xDR_PROC_xD_PKT_MASK;
if (!nreq)
goto requests_left;
@ -642,6 +645,12 @@ acknowledge:
priv->base + EIP197_HIA_RDR(ring) + EIP197_HIA_xDR_PROC_COUNT);
}
/* If the number of requests overflowed the counter, try to proceed more
* requests.
*/
if (nreq == EIP197_xDR_PROC_xD_PKT_MASK)
goto handle_results;
requests_left:
spin_lock_bh(&priv->ring[ring].egress_lock);

2
drivers/crypto/inside-secure/safexcel.h
View File

@ -117,6 +117,8 @@
#define EIP197_xDR_PREP_CLR_COUNT BIT(31)
/* EIP197_HIA_xDR_PROC_COUNT */
#define EIP197_xDR_PROC_xD_PKT_OFFSET 24
#define EIP197_xDR_PROC_xD_PKT_MASK GENMASK(6, 0)
#define EIP197_xDR_PROC_xD_COUNT(n) ((n) << 2)
#define EIP197_xDR_PROC_xD_PKT(n) ((n) << 24)
#define EIP197_xDR_PROC_CLR_COUNT BIT(31)