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-rw-r--r--drivers/crypto/caam/desc_constr.h11
1 files changed, 11 insertions, 0 deletions
diff --git a/drivers/crypto/caam/desc_constr.h b/drivers/crypto/caam/desc_constr.h
index 2980b8ef1fb1..5988a26a2441 100644
--- a/drivers/crypto/caam/desc_constr.h
+++ b/drivers/crypto/caam/desc_constr.h
@@ -3,6 +3,7 @@
* caam descriptor construction helper functions
*
* Copyright 2008-2012 Freescale Semiconductor, Inc.
+ * Copyright 2019 NXP
*/
#ifndef DESC_CONSTR_H
@@ -37,6 +38,16 @@
extern bool caam_little_end;
+/*
+ * HW fetches 4 S/G table entries at a time, irrespective of how many entries
+ * are in the table. It's SW's responsibility to make sure these accesses
+ * do not have side effects.
+ */
+static inline int pad_sg_nents(int sg_nents)
+{
+ return ALIGN(sg_nents, 4);
+}
+
static inline int desc_len(u32 * const desc)
{
return caam32_to_cpu(*desc) & HDR_DESCLEN_MASK;