Messages in this thread Patch in this message | | | From | Fenghua Yu <> | Subject | [PATCH v2 1/3] dmaengine: idxd: Add descriptor definitions for 16 bytes of pattern in memory fill operation | Date | Fri, 3 Mar 2023 13:34:11 -0800 |
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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> --- v2: - Change anonymous struct to uint64_t for pattern_upper (Dave Jiang)
include/uapi/linux/idxd.h | 4 ++++ 1 file changed, 4 insertions(+)
diff --git a/include/uapi/linux/idxd.h b/include/uapi/linux/idxd.h index 1d553bedbdb5..c43d7df5fc15 100644 --- a/include/uapi/linux/idxd.h +++ b/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)); -- 2.37.1
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