commit 2e5f12e2a43b28e95c3783d20bfe8d5d6f9b5fe7
author Tharun Kumar Merugu <mtharu@codeaurora.org> Thu Jul 06 12:04:40 2017 +0530
committer Gerrit - the friendly Code Review server <code-review@localhost> Wed Jul 12 00:08:18 2017 -0700
tree 43796fc057c5815f445478480af97916086bba17
parent 780c4f61bed54c6b04a84b4927a6aa7158e9113b

msm: adsprpc: Map uncached buffers as non-coherent

Map un-cached buffers as non io-coherent to avoid snooping overhead.

Change-Id: I612f9c4217cf7c9df93208a96b8c32fa8758276c
Acked-by: Viswanatham Paduchuri <vpaduchu@qti.qualcomm.com>
Signed-off-by: Tharun Kumar Merugu <mtharu@codeaurora.org>

drivers/char/adsprpc_shared.h

diff --git a/drivers/char/adsprpc_shared.h b/drivers/char/adsprpc_shared.h
index fb7afa3..e3fe064 100644
--- a/drivers/char/adsprpc_shared.h
+++ b/drivers/char/adsprpc_shared.h
@@ -36,6 +36,12 @@
 /* Set for buffers that have no virtual mapping in userspace */
 #define FASTRPC_ATTR_NOVA 0x1
 
+/* Set for buffers that are NOT dma coherent */
+#define FASTRPC_ATTR_NON_COHERENT 0x2
+
+/* Set for buffers that are dma coherent */
+#define FASTRPC_ATTR_COHERENT 0x4
+
 /* Driver should operate in parallel with the co-processor */
 #define FASTRPC_MODE_PARALLEL    0