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From:   Fenghua Yu <fenghua.yu@intel.com>
To:     "Vinod Koul" <vkoul@kernel.org>,
        "Dave Jiang" <dave.jiang@intel.com>
Cc:     dmaengine@vger.kernel.org,
        "linux-kernel" <linux-kernel@vger.kernel.org>,
        Fenghua Yu <fenghua.yu@intel.com>
Subject: [PATCH 1/3] dmaengine: idxd: Add descriptor definitions for 16 bytes of pattern in memory fill operation
Date:   Mon,  7 Nov 2022 16:39:42 -0800
Message-Id: <20221108003944.2095567-2-fenghua.yu@intel.com>
In-Reply-To: <20221108003944.2095567-1-fenghua.yu@intel.com>
References: <20221108003944.2095567-1-fenghua.yu@intel.com>
MIME-Version: 1.0
Content-Transfer-Encoding: 8bit
Precedence: bulk

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>
---
 include/uapi/linux/idxd.h | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/include/uapi/linux/idxd.h b/include/uapi/linux/idxd.h
index 095299c75828..04a2f6411820 100644
--- a/include/uapi/linux/idxd.h
+++ b/include/uapi/linux/idxd.h
@@ -179,6 +179,7 @@ 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;
@@ -243,6 +244,11 @@ struct dsa_hw_desc {
 			uint16_t	dest_app_tag_seed;
 		};
 
+		/* Fill */
+		struct {
+			uint64_t	pattern_upper;
+		};
+
 		uint8_t		op_specific[24];
 	};
 } __attribute__((packed));
-- 
2.32.0