crypto/fsl: fix BLOB encapsulation and decapsulation
The blob_encap and blob_decap functions were not flushing the dcache
before passing data to CAAM/DMA and not invalidating the dcache when
getting data back.
Therefore, blob encapsulation and decapsulation failed with errors like
the following due to data cache incoherency:
"40000006: DECO: desc idx 0: Invalid KEY command"
To ensure coherency, we require the key_mod, src and dst buffers to be
aligned to the cache line size and flush/invalidate the memory regions.
The same requirements apply to the job descriptor.
Tested on an i.MX6Q board.
Reviewed-by: Sumit Garg <sumit.garg@nxp.com>
Signed-off-by: Clemens Gruber <clemens.gruber@pqgruber.com>
diff --git a/include/fsl_sec.h b/include/fsl_sec.h
index 61c671d..a2f5f5a 100644
--- a/include/fsl_sec.h
+++ b/include/fsl_sec.h
@@ -215,6 +215,8 @@
#define SG_ENTRY_OFFSET_SHIFT 0
};
+#define BLOB_SIZE(x) ((x) + 32 + 16) /* Blob buffer size */
+
#if defined(CONFIG_MX6) || defined(CONFIG_MX7)
/* Job Ring Base Address */
#define JR_BASE_ADDR(x) (CONFIG_SYS_FSL_SEC_ADDR + 0x1000 * (x + 1))
@@ -274,8 +276,6 @@
#define PERM 0x0000B008 /* Clear on release, lock SMAP
* lock SMAG group 1 Blob */
-#define BLOB_SIZE(x) (x + 32 + 16) /* Blob buffer size */
-
/* HAB WRAPPED KEY header */
#define WRP_HDR_SIZE 0x08
#define HDR_TAG 0x81