From 3972be23bd2d2bcfaa44595a260a371cd9218872 Mon Sep 17 00:00:00 2001 From: James Smart Date: Mon, 6 Jun 2016 23:20:47 +0200 Subject: [PATCH] nvme.h: add constants for PSDT and FUSE values Signed-off-by: James Smart Reviewed-by: Sagi Grimberg Signed-off-by: Christoph Hellwig Reviewed-by: Keith Busch Signed-off-by: Jens Axboe --- include/linux/nvme.h | 23 +++++++++++++++++++++++ 1 file changed, 23 insertions(+) diff --git a/include/linux/nvme.h b/include/linux/nvme.h index a9b8c7bcaf85..2b82f05fe4ec 100644 --- a/include/linux/nvme.h +++ b/include/linux/nvme.h @@ -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; -- 2.20.1