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Commit 3972be23 authored by James Smart's avatar James Smart Committed by Jens Axboe
Browse files

nvme.h: add constants for PSDT and FUSE values 



Signed-off-by: default avatarJames Smart <james.smart@broadcom.com>
Reviewed-by: default avatarSagi Grimberg <sagi@grimberg.me>
Signed-off-by: default avatarChristoph Hellwig <hch@lst.de>
Reviewed-by: default avatarKeith Busch <keith.busch@intel.com>
Signed-off-by: default avatarJens Axboe <axboe@fb.com>
parent 79f370ea

include/linux/nvme.h

+23 −0
Original line number Diff line number Diff line
@@ -306,6 +306,29 @@ enum nvme_opcode { 
	nvme_cmd_resv_release	= 0x15,

};



/*

 * Lowest two bits of our flags field (FUSE field in the spec):

 *

 * @NVME_CMD_FUSE_FIRST:   Fused Operation, first command

 * @NVME_CMD_FUSE_SECOND:  Fused Operation, second command

 *

 * Highest two bits in our flags field (PSDT field in the spec):

 *

 * @NVME_CMD_PSDT_SGL_METABUF:	Use SGLS for this transfer,

 *	If used, MPTR contains addr of single physical buffer (byte aligned).

 * @NVME_CMD_PSDT_SGL_METASEG:	Use SGLS for this transfer,

 *	If used, MPTR contains an address of an SGL segment containing

 *	exactly 1 SGL descriptor (qword aligned).

 */

enum {

	NVME_CMD_FUSE_FIRST	= (1 << 0),

	NVME_CMD_FUSE_SECOND	= (1 << 1),



	NVME_CMD_SGL_METABUF	= (1 << 6),

	NVME_CMD_SGL_METASEG	= (1 << 7),

	NVME_CMD_SGL_ALL	= NVME_CMD_SGL_METABUF | NVME_CMD_SGL_METASEG,

};



struct nvme_common_command {

	__u8			opcode;

	__u8			flags;