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

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
...@@ -306,6 +306,29 @@ enum nvme_opcode { ...@@ -306,6 +306,29 @@ enum nvme_opcode {
nvme_cmd_resv_release = 0x15, 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 { struct nvme_common_command {
__u8 opcode; __u8 opcode;
__u8 flags; __u8 flags;
......
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