dmaengine: idxd: Add descriptor definitions for 16 bytes of pattern in memory fill operation

The memory fill operation (0x04) can fill in memory with either 8 bytes
or 16 bytes of pattern. To fill in memory with 16 bytes of pattern, the
first 8 bytes are provided in pattern lower in bytes 16-23 and the next
8 bytes are in pattern upper in bytes 40-47 in the descriptor. Currently
only 8 bytes of pattern is enabled.

Add descriptor definitions for pattern lower and pattern upper so that
user can use 16 bytes of pattern to fill memory.
Signed-off-by: Fenghua Yu <fenghua.yu@intel.com>
Reviewed-by: Dave Jiang <dave.jiang@intel.com>
Link: https://lore.kernel.org/r/20230303213413.3357431-2-fenghua.yu@intel.comSigned-off-by: Vinod Koul <vkoul@kernel.org>

include/uapi/linux/idxd.h

@@ -180,6 +180,7 @@ struct dsa_hw_desc {
 		uint64_t	rdback_addr;
 		uint64_t	pattern;
 		uint64_t	desc_list_addr;
+		uint64_t	pattern_lower;
 	};
 	union {
 		uint64_t	dst_addr;
@@ -244,6 +245,9 @@ struct dsa_hw_desc {
 			uint16_t	dest_app_tag_seed;
 		};
 
+		/* Fill */
+		uint64_t	pattern_upper;
+
 		uint8_t		op_specific[24];
 	};
 } __attribute__((packed));