rdma/cxgb4: Add support for 64Byte cqes

This patch adds support for iw_cxb4 to extend cqes from existing 32Byte
size to 64Byte.

Also includes adds backward compatibility support (for 32Byte) to work
with older libraries.

Signed-off-by: Raju Rangoju <rajur@chelsio.com>
Reviewed-by: Steve Wise <swise@opengridcomputing.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>

include/uapi/rdma/cxgb4-abi.h

@@ -44,6 +44,16 @@
  * In particular do not use pointer types -- pass pointers in __aligned_u64
  * instead.
  */
+
+enum {
+	C4IW_64B_CQE = (1 << 0)
+};
+
+struct c4iw_create_cq {
+	__u32 flags;
+	__u32 reserved;
+};
+
 struct c4iw_create_cq_resp {
 	__aligned_u64 key;
 	__aligned_u64 gts_key;
@@ -51,7 +61,7 @@ struct c4iw_create_cq_resp {
 	__u32 cqid;
 	__u32 size;
 	__u32 qid_mask;
-	__u32 reserved; /* explicit padding (optional for i386) */
+	__u32 flags;
 };
 
 enum {