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authorTero Kristo <t-kristo@ti.com>2016-09-19 18:22:16 +0300
committerHerbert Xu <herbert@gondor.apana.org.au>2016-09-22 13:32:50 +0300
commit2c5bd1ef1511ecf3df24a1f2ee94c7f39d3318e1 (patch)
treeb58ad53b362ab2e94c22a7c156cfd894ffc1c80b /drivers/crypto
parentf19de1bc67a042d00175139d1540cdb6ac97ed50 (diff)
downloadlinux-2c5bd1ef1511ecf3df24a1f2ee94c7f39d3318e1.tar.xz
crypto: omap-sham - change the DMA threshold value to a define
Currently the threshold value was hardcoded in the driver. Having a define for it makes it easier to configure. Signed-off-by: Tero Kristo <t-kristo@ti.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Diffstat (limited to 'drivers/crypto')
-rw-r--r--drivers/crypto/omap-sham.c8
1 files changed, 5 insertions, 3 deletions
diff --git a/drivers/crypto/omap-sham.c b/drivers/crypto/omap-sham.c
index 855898977d38..5c95bf97c132 100644
--- a/drivers/crypto/omap-sham.c
+++ b/drivers/crypto/omap-sham.c
@@ -137,6 +137,7 @@
#define OMAP_ALIGNED __attribute__((aligned(sizeof(u32))))
#define BUFLEN PAGE_SIZE
+#define OMAP_SHA_DMA_THRESHOLD 256
struct omap_sham_dev;
@@ -1435,10 +1436,11 @@ static int omap_sham_final(struct ahash_request *req)
/*
* OMAP HW accel works only with buffers >= 9.
* HMAC is always >= 9 because ipad == block size.
- * If buffersize is less than 240, we use fallback SW encoding,
- * as using DMA + HW in this case doesn't provide any benefit.
+ * If buffersize is less than DMA_THRESHOLD, we use fallback
+ * SW encoding, as using DMA + HW in this case doesn't provide
+ * any benefit.
*/
- if (!ctx->digcnt && ctx->bufcnt < 240)
+ if (!ctx->digcnt && ctx->bufcnt < OMAP_SHA_DMA_THRESHOLD)
return omap_sham_final_shash(req);
else if (ctx->bufcnt)
return omap_sham_enqueue(req, OP_FINAL);